llvm/test/Transforms/LoopUnroll/runtime-loop-multiple-exits.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: -p
; RUN: opt < %s -passes=loop-unroll -unroll-runtime=true -unroll-runtime-epilog=true -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,EPILOG
; RUN: opt < %s -passes=loop-unroll -unroll-runtime -unroll-count=2 -unroll-runtime-epilog=true -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,EPILOG-BLOCK
; RUN: opt < %s -passes=loop-unroll -unroll-runtime=true -unroll-runtime-epilog=false -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,PROLOG
; RUN: opt < %s -passes=loop-unroll -unroll-runtime -unroll-runtime-epilog=false -unroll-count=2 -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,PROLOG-BLOCK

; REQUIRES: asserts

; test with three exiting and three exit blocks.
; none of the exit blocks have successors
define void @test1(i64 %trip, i1 %cond) {
; EPILOG-LABEL: @test1(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit2.loopexit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; EPILOG:       loop_exiting_bb1:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2:
; EPILOG-NEXT:    br i1 false, label %loop_latch, label %exit3.loopexit
; EPILOG:       exit3.loopexit:
; EPILOG-NEXT:    br label %exit3
; EPILOG:       exit3.loopexit2:
; EPILOG-NEXT:    br label %exit3
; EPILOG:       exit3:
; EPILOG-NEXT:    ret void
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG:       loop_exiting_bb1.1:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.1:
; EPILOG-NEXT:    br i1 false, label %loop_latch.1, label %exit3.loopexit
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.2, label %loop_exiting_bb1.2
; EPILOG:       loop_exiting_bb1.2:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.2, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.2:
; EPILOG-NEXT:    br i1 false, label %loop_latch.2, label %exit3.loopexit
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.3, label %loop_exiting_bb1.3
; EPILOG:       loop_exiting_bb1.3:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.3, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.3:
; EPILOG-NEXT:    br i1 false, label %loop_latch.3, label %exit3.loopexit
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.4, label %loop_exiting_bb1.4
; EPILOG:       loop_exiting_bb1.4:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.4, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.4:
; EPILOG-NEXT:    br i1 false, label %loop_latch.4, label %exit3.loopexit
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.5, label %loop_exiting_bb1.5
; EPILOG:       loop_exiting_bb1.5:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.5, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.5:
; EPILOG-NEXT:    br i1 false, label %loop_latch.5, label %exit3.loopexit
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.6, label %loop_exiting_bb1.6
; EPILOG:       loop_exiting_bb1.6:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.6, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.6:
; EPILOG-NEXT:    br i1 false, label %loop_latch.6, label %exit3.loopexit
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.7, label %loop_exiting_bb1.7
; EPILOG:       loop_exiting_bb1.7:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.7, label %exit1.loopexit
; EPILOG:       loop_exiting_bb2.7:
; EPILOG-NEXT:    br i1 false, label %loop_latch.7, label %exit3.loopexit
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit2.loopexit.unr-lcssa.loopexit
; EPILOG:       exit1.loopexit:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1.loopexit1:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
; EPILOG:       exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit2.loopexit.unr-lcssa
; EPILOG:       exit2.loopexit.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.loopexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2.loopexit
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG:       loop_exiting_bb1.epil:
; EPILOG-NEXT:    br i1 false, label %loop_exiting_bb2.epil, label %exit1.loopexit1
; EPILOG:       loop_exiting_bb2.epil:
; EPILOG-NEXT:    br i1 false, label %loop_latch.epil, label %exit3.loopexit2
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.loopexit.epilog-lcssa, !llvm.loop !0
; EPILOG:       exit2.loopexit.epilog-lcssa:
; EPILOG-NEXT:    br label %exit2.loopexit
; EPILOG:       exit2.loopexit:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test1(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit2.loopexit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; EPILOG-BLOCK:       loop_exiting_bb1:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loop_latch, label %exit3.loopexit
; EPILOG-BLOCK:       exit3.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit3
; EPILOG-BLOCK:       exit3:
; EPILOG-BLOCK-NEXT:    ret void
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG-BLOCK:       loop_exiting_bb1.1:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loop_latch.1, label %exit3.loopexit
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit2.loopexit.unr-lcssa.loopexit, !llvm.loop !0
; EPILOG-BLOCK:       exit1.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
; EPILOG-BLOCK:       exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit2.loopexit.unr-lcssa
; EPILOG-BLOCK:       exit2.loopexit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2.loopexit
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG-BLOCK:       loop_exiting_bb1.epil:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loop_exiting_bb2.epil, label %exit1
; EPILOG-BLOCK:       loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loop_latch.epil, label %exit3
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit2.loopexit
; EPILOG-BLOCK:       exit2.loopexit:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test1(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.prol, label %loop_exiting_bb1.prol
; PROLOG:       loop_exiting_bb1.prol:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.prol, label %exit1.loopexit1
; PROLOG:       loop_exiting_bb2.prol:
; PROLOG-NEXT:    br i1 false, label %loop_latch.prol, label %exit3.loopexit2
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !0
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit2.loopexit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; PROLOG:       loop_exiting_bb1:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2:
; PROLOG-NEXT:    br i1 false, label %loop_latch, label %exit3.loopexit
; PROLOG:       exit3.loopexit:
; PROLOG-NEXT:    br label %exit3
; PROLOG:       exit3.loopexit2:
; PROLOG-NEXT:    br label %exit3
; PROLOG:       exit3:
; PROLOG-NEXT:    ret void
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; PROLOG:       loop_exiting_bb1.1:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.1:
; PROLOG-NEXT:    br i1 false, label %loop_latch.1, label %exit3.loopexit
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.2, label %loop_exiting_bb1.2
; PROLOG:       loop_exiting_bb1.2:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.2, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.2:
; PROLOG-NEXT:    br i1 false, label %loop_latch.2, label %exit3.loopexit
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.3, label %loop_exiting_bb1.3
; PROLOG:       loop_exiting_bb1.3:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.3, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.3:
; PROLOG-NEXT:    br i1 false, label %loop_latch.3, label %exit3.loopexit
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.4, label %loop_exiting_bb1.4
; PROLOG:       loop_exiting_bb1.4:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.4, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.4:
; PROLOG-NEXT:    br i1 false, label %loop_latch.4, label %exit3.loopexit
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.5, label %loop_exiting_bb1.5
; PROLOG:       loop_exiting_bb1.5:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.5, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.5:
; PROLOG-NEXT:    br i1 false, label %loop_latch.5, label %exit3.loopexit
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.6, label %loop_exiting_bb1.6
; PROLOG:       loop_exiting_bb1.6:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.6, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.6:
; PROLOG-NEXT:    br i1 false, label %loop_latch.6, label %exit3.loopexit
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.7, label %loop_exiting_bb1.7
; PROLOG:       loop_exiting_bb1.7:
; PROLOG-NEXT:    br i1 false, label %loop_exiting_bb2.7, label %exit1.loopexit
; PROLOG:       loop_exiting_bb2.7:
; PROLOG-NEXT:    br i1 false, label %loop_latch.7, label %exit3.loopexit
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit2.loopexit.unr-lcssa
; PROLOG:       exit1.loopexit:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1.loopexit1:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
; PROLOG:       exit2.loopexit.unr-lcssa:
; PROLOG-NEXT:    br label %exit2.loopexit
; PROLOG:       exit2.loopexit:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test1(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.prol, label %loop_exiting_bb1.prol
; PROLOG-BLOCK:       loop_exiting_bb1.prol:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loop_exiting_bb2.prol, label %exit1
; PROLOG-BLOCK:       loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loop_latch.prol, label %exit3
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit2.loopexit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; PROLOG-BLOCK:       loop_exiting_bb1:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loop_latch, label %exit3.loopexit
; PROLOG-BLOCK:       exit3.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit3
; PROLOG-BLOCK:       exit3:
; PROLOG-BLOCK-NEXT:    ret void
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; PROLOG-BLOCK:       loop_exiting_bb1.1:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loop_latch.1, label %exit3.loopexit
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit2.loopexit.unr-lcssa, !llvm.loop !0
; PROLOG-BLOCK:       exit1.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
; PROLOG-BLOCK:       exit2.loopexit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit2.loopexit
; PROLOG-BLOCK:       exit2.loopexit:
; PROLOG-BLOCK-NEXT:    ret void
;

entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  br i1 %cond, label %loop_latch, label %loop_exiting_bb1

loop_exiting_bb1:
  br i1 false, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
  br i1 false, label %loop_latch, label %exit3

exit3:
  ret void

loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit2.loopexit

exit1:
  ret void

exit2.loopexit:
  ret void
}


; test with three exiting and two exit blocks.
; The non-latch exit block has 2 unique predecessors.
; There are 2 values passed to the exit blocks that are calculated at every iteration.
; %sum.02 and %add. Both of these are incoming values for phi from every exiting
; unrolled block.
define i32 @test2(ptr nocapture %a, i64 %n) {
; EPILOG-LABEL: @test2(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %n
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %for.end.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %for.body.7 ]
; EPILOG-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %for.body.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %for.body.7 ]
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG:       for.exiting_block:
; EPILOG-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %for.body
; EPILOG:       for.body:
; EPILOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG:       for.exiting_block.1:
; EPILOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; EPILOG:       for.body.1:
; EPILOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-NEXT:    %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.2
; EPILOG:       for.exiting_block.2:
; EPILOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.2, label %for.exit2.loopexit, label %for.body.2
; EPILOG:       for.body.2:
; EPILOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; EPILOG-NEXT:    %5 = load i32, ptr %arrayidx.2, align 4
; EPILOG-NEXT:    %add.2 = add nsw i32 %5, %add.1
; EPILOG-NEXT:    %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.3
; EPILOG:       for.exiting_block.3:
; EPILOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.3, label %for.exit2.loopexit, label %for.body.3
; EPILOG:       for.body.3:
; EPILOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; EPILOG-NEXT:    %6 = load i32, ptr %arrayidx.3, align 4
; EPILOG-NEXT:    %add.3 = add nsw i32 %6, %add.2
; EPILOG-NEXT:    %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.4
; EPILOG:       for.exiting_block.4:
; EPILOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.4, label %for.exit2.loopexit, label %for.body.4
; EPILOG:       for.body.4:
; EPILOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; EPILOG-NEXT:    %7 = load i32, ptr %arrayidx.4, align 4
; EPILOG-NEXT:    %add.4 = add nsw i32 %7, %add.3
; EPILOG-NEXT:    %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.5
; EPILOG:       for.exiting_block.5:
; EPILOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.5, label %for.exit2.loopexit, label %for.body.5
; EPILOG:       for.body.5:
; EPILOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; EPILOG-NEXT:    %8 = load i32, ptr %arrayidx.5, align 4
; EPILOG-NEXT:    %add.5 = add nsw i32 %8, %add.4
; EPILOG-NEXT:    %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.6
; EPILOG:       for.exiting_block.6:
; EPILOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.6, label %for.exit2.loopexit, label %for.body.6
; EPILOG:       for.body.6:
; EPILOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; EPILOG-NEXT:    %9 = load i32, ptr %arrayidx.6, align 4
; EPILOG-NEXT:    %add.6 = add nsw i32 %9, %add.5
; EPILOG-NEXT:    %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.7
; EPILOG:       for.exiting_block.7:
; EPILOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.7, label %for.exit2.loopexit, label %for.body.7
; EPILOG:       for.body.7:
; EPILOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; EPILOG-NEXT:    %10 = load i32, ptr %arrayidx.7, align 4
; EPILOG-NEXT:    %add.7 = add nsw i32 %10, %add.6
; EPILOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %for.end.unr-lcssa.loopexit, label %header
; EPILOG:       for.end.unr-lcssa.loopexit:
; EPILOG-NEXT:    %sum.0.lcssa.ph.ph = phi i32 [ %add.7, %for.body.7 ]
; EPILOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %for.body.7 ]
; EPILOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.7, %for.body.7 ]
; EPILOG-NEXT:    br label %for.end.unr-lcssa
; EPILOG:       for.end.unr-lcssa:
; EPILOG-NEXT:    %sum.0.lcssa.ph = phi i32 [ undef, %entry ], [ %sum.0.lcssa.ph.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %for.end
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %for.body.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %sum.02.epil = phi i32 [ %add.epil, %for.body.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %for.body.epil ]
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit2, label %for.exiting_block.epil
; EPILOG:       for.exiting_block.epil:
; EPILOG-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.epil, label %for.exit2.loopexit2, label %for.body.epil
; EPILOG:       for.body.epil:
; EPILOG-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.epil
; EPILOG-NEXT:    %11 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-NEXT:    %add.epil = add nsw i32 %11, %sum.02.epil
; EPILOG-NEXT:    %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT:    %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %for.end.epilog-lcssa, !llvm.loop !2
; EPILOG:       for.end.epilog-lcssa:
; EPILOG-NEXT:    %sum.0.lcssa.ph1 = phi i32 [ %add.epil, %for.body.epil ]
; EPILOG-NEXT:    br label %for.end
; EPILOG:       for.end:
; EPILOG-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.ph, %for.end.unr-lcssa ], [ %sum.0.lcssa.ph1, %for.end.epilog-lcssa ]
; EPILOG-NEXT:    ret i32 %sum.0.lcssa
; EPILOG:       for.exit2.loopexit:
; EPILOG-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ], [ %add.1, %for.body.1 ], [ 42, %for.exiting_block.2 ], [ %add.2, %for.body.2 ], [ 42, %for.exiting_block.3 ], [ %add.3, %for.body.3 ], [ 42, %for.exiting_block.4 ], [ %add.4, %for.body.4 ], [ 42, %for.exiting_block.5 ], [ %add.5, %for.body.5 ], [ 42, %for.exiting_block.6 ], [ %add.6, %for.body.6 ], [ 42, %for.exiting_block.7 ]
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2.loopexit2:
; EPILOG-NEXT:    %retval.ph3 = phi i32 [ 42, %for.exiting_block.epil ], [ %sum.02.epil, %header.epil ]
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2:
; EPILOG-NEXT:    %retval = phi i32 [ %retval.ph, %for.exit2.loopexit ], [ %retval.ph3, %for.exit2.loopexit2 ]
; EPILOG-NEXT:    ret i32 %retval
;
; EPILOG-BLOCK-LABEL: @test2(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %n
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %for.end.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG-BLOCK:       for.exiting_block:
; EPILOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %for.body
; EPILOG-BLOCK:       for.body:
; EPILOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-BLOCK-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-BLOCK-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK:       for.exiting_block.1:
; EPILOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; EPILOG-BLOCK:       for.body.1:
; EPILOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %for.end.unr-lcssa.loopexit, label %header, !llvm.loop !2
; EPILOG-BLOCK:       for.end.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %sum.0.lcssa.ph.ph = phi i32 [ %add.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr.ph = phi i32 [ %add.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT:    br label %for.end.unr-lcssa
; EPILOG-BLOCK:       for.end.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %sum.0.lcssa.ph = phi i32 [ undef, %entry ], [ %sum.0.lcssa.ph.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %for.end
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 false, label %for.exit2, label %for.exiting_block.epil
; EPILOG-BLOCK:       for.exiting_block.epil:
; EPILOG-BLOCK-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.epil, label %for.exit2, label %for.body.epil
; EPILOG-BLOCK:       for.body.epil:
; EPILOG-BLOCK-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT:    %add.epil = add nsw i32 %5, %sum.02.unr
; EPILOG-BLOCK-NEXT:    br label %for.end
; EPILOG-BLOCK:       for.end:
; EPILOG-BLOCK-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.ph, %for.end.unr-lcssa ], [ %add.epil, %for.body.epil ]
; EPILOG-BLOCK-NEXT:    ret i32 %sum.0.lcssa
; EPILOG-BLOCK:       for.exit2.loopexit:
; EPILOG-BLOCK-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ]
; EPILOG-BLOCK-NEXT:    br label %for.exit2
; EPILOG-BLOCK:       for.exit2:
; EPILOG-BLOCK-NEXT:    %retval = phi i32 [ %sum.02.unr, %header.epil ], [ 42, %for.exiting_block.epil ], [ %retval.ph, %for.exit2.loopexit ]
; EPILOG-BLOCK-NEXT:    ret i32 %retval
;
; PROLOG-LABEL: @test2(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %n
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %for.body.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %sum.02.prol = phi i32 [ %add.prol, %for.body.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %for.body.prol ]
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit1, label %for.exiting_block.prol
; PROLOG:       for.exiting_block.prol:
; PROLOG-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.prol, label %for.exit2.loopexit1, label %for.body.prol
; PROLOG:       for.body.prol:
; PROLOG-NEXT:    %arrayidx.prol = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.prol
; PROLOG-NEXT:    %2 = load i32, ptr %arrayidx.prol, align 4
; PROLOG-NEXT:    %add.prol = add nsw i32 %2, %sum.02.prol
; PROLOG-NEXT:    %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT:    %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !2
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %sum.0.lcssa.unr.ph = phi i32 [ %add.prol, %for.body.prol ]
; PROLOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %for.body.prol ]
; PROLOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.prol, %for.body.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %sum.0.lcssa.unr = phi i32 [ undef, %entry ], [ %sum.0.lcssa.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %3, label %for.end, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %for.body.7 ]
; PROLOG-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %for.body.7 ]
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG:       for.exiting_block:
; PROLOG-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %for.body
; PROLOG:       for.body:
; PROLOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG:       for.exiting_block.1:
; PROLOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; PROLOG:       for.body.1:
; PROLOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.2
; PROLOG:       for.exiting_block.2:
; PROLOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.2, label %for.exit2.loopexit, label %for.body.2
; PROLOG:       for.body.2:
; PROLOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; PROLOG-NEXT:    %6 = load i32, ptr %arrayidx.2, align 4
; PROLOG-NEXT:    %add.2 = add nsw i32 %6, %add.1
; PROLOG-NEXT:    %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.3
; PROLOG:       for.exiting_block.3:
; PROLOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.3, label %for.exit2.loopexit, label %for.body.3
; PROLOG:       for.body.3:
; PROLOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; PROLOG-NEXT:    %7 = load i32, ptr %arrayidx.3, align 4
; PROLOG-NEXT:    %add.3 = add nsw i32 %7, %add.2
; PROLOG-NEXT:    %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.4
; PROLOG:       for.exiting_block.4:
; PROLOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.4, label %for.exit2.loopexit, label %for.body.4
; PROLOG:       for.body.4:
; PROLOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; PROLOG-NEXT:    %8 = load i32, ptr %arrayidx.4, align 4
; PROLOG-NEXT:    %add.4 = add nsw i32 %8, %add.3
; PROLOG-NEXT:    %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.5
; PROLOG:       for.exiting_block.5:
; PROLOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.5, label %for.exit2.loopexit, label %for.body.5
; PROLOG:       for.body.5:
; PROLOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; PROLOG-NEXT:    %9 = load i32, ptr %arrayidx.5, align 4
; PROLOG-NEXT:    %add.5 = add nsw i32 %9, %add.4
; PROLOG-NEXT:    %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.6
; PROLOG:       for.exiting_block.6:
; PROLOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.6, label %for.exit2.loopexit, label %for.body.6
; PROLOG:       for.body.6:
; PROLOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; PROLOG-NEXT:    %10 = load i32, ptr %arrayidx.6, align 4
; PROLOG-NEXT:    %add.6 = add nsw i32 %10, %add.5
; PROLOG-NEXT:    %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.7
; PROLOG:       for.exiting_block.7:
; PROLOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.7, label %for.exit2.loopexit, label %for.body.7
; PROLOG:       for.body.7:
; PROLOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; PROLOG-NEXT:    %11 = load i32, ptr %arrayidx.7, align 4
; PROLOG-NEXT:    %add.7 = add nsw i32 %11, %add.6
; PROLOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT:    %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT:    br i1 %exitcond.7, label %for.end.unr-lcssa, label %header
; PROLOG:       for.end.unr-lcssa:
; PROLOG-NEXT:    %sum.0.lcssa.ph = phi i32 [ %add.7, %for.body.7 ]
; PROLOG-NEXT:    br label %for.end
; PROLOG:       for.end:
; PROLOG-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.unr, %header.prol.loopexit ], [ %sum.0.lcssa.ph, %for.end.unr-lcssa ]
; PROLOG-NEXT:    ret i32 %sum.0.lcssa
; PROLOG:       for.exit2.loopexit:
; PROLOG-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ], [ %add.1, %for.body.1 ], [ 42, %for.exiting_block.2 ], [ %add.2, %for.body.2 ], [ 42, %for.exiting_block.3 ], [ %add.3, %for.body.3 ], [ 42, %for.exiting_block.4 ], [ %add.4, %for.body.4 ], [ 42, %for.exiting_block.5 ], [ %add.5, %for.body.5 ], [ 42, %for.exiting_block.6 ], [ %add.6, %for.body.6 ], [ 42, %for.exiting_block.7 ]
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2.loopexit1:
; PROLOG-NEXT:    %retval.ph2 = phi i32 [ 42, %for.exiting_block.prol ], [ %sum.02.prol, %header.prol ]
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2:
; PROLOG-NEXT:    %retval = phi i32 [ %retval.ph, %for.exit2.loopexit ], [ %retval.ph2, %for.exit2.loopexit1 ]
; PROLOG-NEXT:    ret i32 %retval
;
; PROLOG-BLOCK-LABEL: @test2(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %n
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 false, label %for.exit2, label %for.exiting_block.prol
; PROLOG-BLOCK:       for.exiting_block.prol:
; PROLOG-BLOCK-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.prol, label %for.exit2, label %for.body.prol
; PROLOG-BLOCK:       for.body.prol:
; PROLOG-BLOCK-NEXT:    %2 = load i32, ptr %a, align 4
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %sum.0.lcssa.unr = phi i32 [ undef, %entry ], [ %2, %for.body.prol ]
; PROLOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %for.body.prol ]
; PROLOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %2, %for.body.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %for.end, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %for.body.1 ]
; PROLOG-BLOCK-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %for.body.1 ]
; PROLOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG-BLOCK:       for.exiting_block:
; PROLOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %for.body
; PROLOG-BLOCK:       for.body:
; PROLOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-BLOCK-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-BLOCK-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK:       for.exiting_block.1:
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; PROLOG-BLOCK:       for.body.1:
; PROLOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT:    %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT:    br i1 %exitcond.1, label %for.end.unr-lcssa, label %header, !llvm.loop !2
; PROLOG-BLOCK:       for.end.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %sum.0.lcssa.ph = phi i32 [ %add.1, %for.body.1 ]
; PROLOG-BLOCK-NEXT:    br label %for.end
; PROLOG-BLOCK:       for.end:
; PROLOG-BLOCK-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.unr, %header.prol.loopexit ], [ %sum.0.lcssa.ph, %for.end.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i32 %sum.0.lcssa
; PROLOG-BLOCK:       for.exit2.loopexit:
; PROLOG-BLOCK-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ]
; PROLOG-BLOCK-NEXT:    br label %for.exit2
; PROLOG-BLOCK:       for.exit2:
; PROLOG-BLOCK-NEXT:    %retval = phi i32 [ 0, %header.prol ], [ 42, %for.exiting_block.prol ], [ %retval.ph, %for.exit2.loopexit ]
; PROLOG-BLOCK-NEXT:    ret i32 %retval
;


entry:
  br label %header

header:
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
  br i1 false, label %for.exit2, label %for.exiting_block

for.exiting_block:
  %cmp = icmp eq i64 %n, 42
  br i1 %cmp, label %for.exit2, label %for.body

for.body:
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %0, %sum.02
  %indvars.iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %for.end, label %header

for.end:                                          ; preds = %for.body
  %sum.0.lcssa = phi i32 [ %add, %for.body ]
  ret i32 %sum.0.lcssa

for.exit2:
  %retval = phi i32 [ %sum.02, %header ], [ 42, %for.exiting_block ]
  ret i32 %retval
}

; test with two exiting and three exit blocks.
; the non-latch exiting block has a switch.
define void @test3(i64 %trip, i64 %add) {
; EPILOG-LABEL: @test3(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit2.loopexit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %sum = phi i64 [ 0, %entry.new ], [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br i1 undef, label %loop_latch, label %loop_exiting_bb1
; EPILOG:       loop_exiting_bb1:
; EPILOG-NEXT:    switch i64 %sum, label %loop_latch [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       exit3.loopexit:
; EPILOG-NEXT:    br label %exit3
; EPILOG:       exit3.loopexit2:
; EPILOG-NEXT:    br label %exit3
; EPILOG:       exit3:
; EPILOG-NEXT:    ret void
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %sum.next = add i64 %sum, %add
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG:       loop_exiting_bb1.1:
; EPILOG-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.2, label %loop_exiting_bb1.2
; EPILOG:       loop_exiting_bb1.2:
; EPILOG-NEXT:    switch i64 %sum.next.1, label %loop_latch.2 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %sum.next.2 = add i64 %sum.next.1, %add
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.3, label %loop_exiting_bb1.3
; EPILOG:       loop_exiting_bb1.3:
; EPILOG-NEXT:    switch i64 %sum.next.2, label %loop_latch.3 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %sum.next.3 = add i64 %sum.next.2, %add
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.4, label %loop_exiting_bb1.4
; EPILOG:       loop_exiting_bb1.4:
; EPILOG-NEXT:    switch i64 %sum.next.3, label %loop_latch.4 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %sum.next.4 = add i64 %sum.next.3, %add
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.5, label %loop_exiting_bb1.5
; EPILOG:       loop_exiting_bb1.5:
; EPILOG-NEXT:    switch i64 %sum.next.4, label %loop_latch.5 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %sum.next.5 = add i64 %sum.next.4, %add
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.6, label %loop_exiting_bb1.6
; EPILOG:       loop_exiting_bb1.6:
; EPILOG-NEXT:    switch i64 %sum.next.5, label %loop_latch.6 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %sum.next.6 = add i64 %sum.next.5, %add
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 undef, label %loop_latch.7, label %loop_exiting_bb1.7
; EPILOG:       loop_exiting_bb1.7:
; EPILOG-NEXT:    switch i64 %sum.next.6, label %loop_latch.7 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add nuw nsw i64 %iv_next.6, 1
; EPILOG-NEXT:    %sum.next.7 = add i64 %sum.next.6, %add
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit2.loopexit.unr-lcssa.loopexit
; EPILOG:       exit1.loopexit:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1.loopexit1:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
; EPILOG:       exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %sum.unr.ph = phi i64 [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit2.loopexit.unr-lcssa
; EPILOG:       exit2.loopexit.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.loopexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %exit2.loopexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2.loopexit
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %sum.epil = phi i64 [ %sum.unr, %loop_header.epil.preheader ], [ %sum.next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    br i1 undef, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG:       loop_exiting_bb1.epil:
; EPILOG-NEXT:    switch i64 %sum.epil, label %loop_latch.epil [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit1
; EPILOG-NEXT:    i64 42, label %exit3.loopexit2
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add nuw nsw i64 %iv.epil, 1
; EPILOG-NEXT:    %sum.next.epil = add i64 %sum.epil, %add
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.loopexit.epilog-lcssa, !llvm.loop !3
; EPILOG:       exit2.loopexit.epilog-lcssa:
; EPILOG-NEXT:    br label %exit2.loopexit
; EPILOG:       exit2.loopexit:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test3(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit2.loopexit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum = phi i64 [ 0, %entry.new ], [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 undef, label %loop_latch, label %loop_exiting_bb1
; EPILOG-BLOCK:       loop_exiting_bb1:
; EPILOG-BLOCK-NEXT:    switch i64 %sum, label %loop_latch [
; EPILOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-BLOCK-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-BLOCK-NEXT:    ]
; EPILOG-BLOCK:       exit3.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit3
; EPILOG-BLOCK:       exit3:
; EPILOG-BLOCK-NEXT:    ret void
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %sum.next = add i64 %sum, %add
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 undef, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG-BLOCK:       loop_exiting_bb1.1:
; EPILOG-BLOCK-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; EPILOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-BLOCK-NEXT:    i64 42, label %exit3.loopexit
; EPILOG-BLOCK-NEXT:    ]
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit2.loopexit.unr-lcssa.loopexit, !llvm.loop !3
; EPILOG-BLOCK:       exit1.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
; EPILOG-BLOCK:       exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %sum.unr.ph = phi i64 [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %exit2.loopexit.unr-lcssa
; EPILOG-BLOCK:       exit2.loopexit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %exit2.loopexit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2.loopexit
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    br i1 undef, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG-BLOCK:       loop_exiting_bb1.epil:
; EPILOG-BLOCK-NEXT:    switch i64 %sum.unr, label %loop_latch.epil [
; EPILOG-BLOCK-NEXT:    i64 24, label %exit1
; EPILOG-BLOCK-NEXT:    i64 42, label %exit3
; EPILOG-BLOCK-NEXT:    ]
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit2.loopexit
; EPILOG-BLOCK:       exit2.loopexit:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test3(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %sum.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %sum.next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    br i1 undef, label %loop_latch.prol, label %loop_exiting_bb1.prol
; PROLOG:       loop_exiting_bb1.prol:
; PROLOG-NEXT:    switch i64 %sum.prol, label %loop_latch.prol [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit1
; PROLOG-NEXT:    i64 42, label %exit3.loopexit2
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add nuw nsw i64 %iv.prol, 1
; PROLOG-NEXT:    %sum.next.prol = add i64 %sum.prol, %add
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !3
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %sum.unr.ph = phi i64 [ %sum.next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit2.loopexit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    %sum = phi i64 [ %sum.unr, %entry.new ], [ %sum.next.7, %loop_latch.7 ]
; PROLOG-NEXT:    br i1 undef, label %loop_latch, label %loop_exiting_bb1
; PROLOG:       loop_exiting_bb1:
; PROLOG-NEXT:    switch i64 %sum, label %loop_latch [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       exit3.loopexit:
; PROLOG-NEXT:    br label %exit3
; PROLOG:       exit3.loopexit2:
; PROLOG-NEXT:    br label %exit3
; PROLOG:       exit3:
; PROLOG-NEXT:    ret void
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; PROLOG-NEXT:    %sum.next = add i64 %sum, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.1, label %loop_exiting_bb1.1
; PROLOG:       loop_exiting_bb1.1:
; PROLOG-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; PROLOG-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.2, label %loop_exiting_bb1.2
; PROLOG:       loop_exiting_bb1.2:
; PROLOG-NEXT:    switch i64 %sum.next.1, label %loop_latch.2 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; PROLOG-NEXT:    %sum.next.2 = add i64 %sum.next.1, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.3, label %loop_exiting_bb1.3
; PROLOG:       loop_exiting_bb1.3:
; PROLOG-NEXT:    switch i64 %sum.next.2, label %loop_latch.3 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; PROLOG-NEXT:    %sum.next.3 = add i64 %sum.next.2, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.4, label %loop_exiting_bb1.4
; PROLOG:       loop_exiting_bb1.4:
; PROLOG-NEXT:    switch i64 %sum.next.3, label %loop_latch.4 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; PROLOG-NEXT:    %sum.next.4 = add i64 %sum.next.3, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.5, label %loop_exiting_bb1.5
; PROLOG:       loop_exiting_bb1.5:
; PROLOG-NEXT:    switch i64 %sum.next.4, label %loop_latch.5 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; PROLOG-NEXT:    %sum.next.5 = add i64 %sum.next.4, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.6, label %loop_exiting_bb1.6
; PROLOG:       loop_exiting_bb1.6:
; PROLOG-NEXT:    switch i64 %sum.next.5, label %loop_latch.6 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; PROLOG-NEXT:    %sum.next.6 = add i64 %sum.next.5, %add
; PROLOG-NEXT:    br i1 undef, label %loop_latch.7, label %loop_exiting_bb1.7
; PROLOG:       loop_exiting_bb1.7:
; PROLOG-NEXT:    switch i64 %sum.next.6, label %loop_latch.7 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add nuw nsw i64 %iv_next.6, 1
; PROLOG-NEXT:    %sum.next.7 = add i64 %sum.next.6, %add
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit2.loopexit.unr-lcssa
; PROLOG:       exit1.loopexit:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1.loopexit1:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
; PROLOG:       exit2.loopexit.unr-lcssa:
; PROLOG-NEXT:    br label %exit2.loopexit
; PROLOG:       exit2.loopexit:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test3(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    br i1 undef, label %loop_latch.prol, label %loop_exiting_bb1.prol
; PROLOG-BLOCK:       loop_exiting_bb1.prol:
; PROLOG-BLOCK-NEXT:    switch i64 0, label %loop_latch.prol [
; PROLOG-BLOCK-NEXT:    i64 24, label %exit1
; PROLOG-BLOCK-NEXT:    i64 42, label %exit3
; PROLOG-BLOCK-NEXT:    ]
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %add, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit2.loopexit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum = phi i64 [ %sum.unr, %entry.new ], [ %sum.next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 undef, label %loop_latch, label %loop_exiting_bb1
; PROLOG-BLOCK:       loop_exiting_bb1:
; PROLOG-BLOCK-NEXT:    switch i64 %sum, label %loop_latch [
; PROLOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-BLOCK-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-BLOCK-NEXT:    ]
; PROLOG-BLOCK:       exit3.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit3
; PROLOG-BLOCK:       exit3:
; PROLOG-BLOCK-NEXT:    ret void
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; PROLOG-BLOCK-NEXT:    %sum.next = add i64 %sum, %add
; PROLOG-BLOCK-NEXT:    br i1 undef, label %loop_latch.1, label %loop_exiting_bb1.1
; PROLOG-BLOCK:       loop_exiting_bb1.1:
; PROLOG-BLOCK-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; PROLOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-BLOCK-NEXT:    i64 42, label %exit3.loopexit
; PROLOG-BLOCK-NEXT:    ]
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit2.loopexit.unr-lcssa, !llvm.loop !3
; PROLOG-BLOCK:       exit1.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
; PROLOG-BLOCK:       exit2.loopexit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit2.loopexit
; PROLOG-BLOCK:       exit2.loopexit:
; PROLOG-BLOCK-NEXT:    ret void
;

entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  %sum = phi i64 [ 0, %entry ], [ %sum.next, %loop_latch ]
  br i1 undef, label %loop_latch, label %loop_exiting_bb1

loop_exiting_bb1:
  switch i64 %sum, label %loop_latch [
  i64 24, label %exit1
  i64 42, label %exit3
  ]

exit3:
  ret void

loop_latch:
  %iv_next = add nuw nsw i64 %iv, 1
  %sum.next = add i64 %sum, %add
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit2.loopexit

exit1:
  ret void

exit2.loopexit:
  ret void
}

; FIXME: Support multiple exiting blocks to the same latch exit block.
; Three exiting blocks where header and latch exit to same LatchExit.
define i32 @hdr_latch_same_exit(ptr nocapture %a, i64 %n, i1 %cond) {
; EPILOG-LABEL: @hdr_latch_same_exit(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %n
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block
; EPILOG:       for.exiting_block:
; EPILOG-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.1
; EPILOG:       for.exiting_block.1:
; EPILOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-NEXT:    %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.2
; EPILOG:       for.exiting_block.2:
; EPILOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.2, label %for.exit2.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; EPILOG-NEXT:    %5 = load i32, ptr %arrayidx.2, align 4
; EPILOG-NEXT:    %add.2 = add nsw i32 %5, %add.1
; EPILOG-NEXT:    %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.3
; EPILOG:       for.exiting_block.3:
; EPILOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.3, label %for.exit2.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; EPILOG-NEXT:    %6 = load i32, ptr %arrayidx.3, align 4
; EPILOG-NEXT:    %add.3 = add nsw i32 %6, %add.2
; EPILOG-NEXT:    %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.4
; EPILOG:       for.exiting_block.4:
; EPILOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.4, label %for.exit2.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; EPILOG-NEXT:    %7 = load i32, ptr %arrayidx.4, align 4
; EPILOG-NEXT:    %add.4 = add nsw i32 %7, %add.3
; EPILOG-NEXT:    %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.5
; EPILOG:       for.exiting_block.5:
; EPILOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.5, label %for.exit2.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; EPILOG-NEXT:    %8 = load i32, ptr %arrayidx.5, align 4
; EPILOG-NEXT:    %add.5 = add nsw i32 %8, %add.4
; EPILOG-NEXT:    %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.6
; EPILOG:       for.exiting_block.6:
; EPILOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.6, label %for.exit2.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; EPILOG-NEXT:    %9 = load i32, ptr %arrayidx.6, align 4
; EPILOG-NEXT:    %add.6 = add nsw i32 %9, %add.5
; EPILOG-NEXT:    %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.7
; EPILOG:       for.exiting_block.7:
; EPILOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.7, label %for.exit2.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; EPILOG-NEXT:    %10 = load i32, ptr %arrayidx.7, align 4
; EPILOG-NEXT:    %add.7 = add nsw i32 %10, %add.6
; EPILOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %latchExit.unr-lcssa.loopexit, label %header
; EPILOG:       latchExit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    br label %latchExit.unr-lcssa
; EPILOG:       latchExit.unr-lcssa:
; EPILOG-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %latch.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %sum.02.epil = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit2, label %for.exiting_block.epil
; EPILOG:       for.exiting_block.epil:
; EPILOG-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.epil, label %for.exit2.loopexit4, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.epil
; EPILOG-NEXT:    %11 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-NEXT:    %add.epil = add nsw i32 %11, %sum.02.epil
; EPILOG-NEXT:    %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT:    %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latchExit.epilog-lcssa.loopexit2, !llvm.loop !4
; EPILOG:       latchExit.epilog-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph1.ph = phi i32 [ 0, %header ], [ 0, %latch ], [ 0, %latch.1 ], [ 0, %latch.2 ], [ 0, %latch.3 ], [ 0, %latch.4 ], [ 0, %latch.5 ], [ 0, %latch.6 ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa.loopexit2:
; EPILOG-NEXT:    %result.ph1.ph3 = phi i32 [ 0, %header.epil ], [ %add.epil, %latch.epil ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa:
; EPILOG-NEXT:    %result.ph1 = phi i32 [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ], [ %result.ph1.ph3, %latchExit.epilog-lcssa.loopexit2 ]
; EPILOG-NEXT:    br label %latchExit
; EPILOG:       latchExit:
; EPILOG-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-NEXT:    ret i32 %result
; EPILOG:       for.exit2.loopexit:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2.loopexit4:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2:
; EPILOG-NEXT:    ret i32 42
;
; EPILOG-BLOCK-LABEL: @hdr_latch_same_exit(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %n
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block
; EPILOG-BLOCK:       for.exiting_block:
; EPILOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-BLOCK-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-BLOCK-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK:       for.exiting_block.1:
; EPILOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !4
; EPILOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; EPILOG-BLOCK:       latchExit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %latchExit.epilog-lcssa, label %for.exiting_block.epil
; EPILOG-BLOCK:       for.exiting_block.epil:
; EPILOG-BLOCK-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.epil, label %for.exit2, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT:    %add.epil = add nsw i32 %5, %sum.02.unr
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph1.ph = phi i32 [ 0, %header ], [ 0, %latch ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph1 = phi i32 [ %add.epil, %latch.epil ], [ 0, %header.epil ], [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    br label %latchExit
; EPILOG-BLOCK:       latchExit:
; EPILOG-BLOCK-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-BLOCK-NEXT:    ret i32 %result
; EPILOG-BLOCK:       for.exit2.loopexit:
; EPILOG-BLOCK-NEXT:    br label %for.exit2
; EPILOG-BLOCK:       for.exit2:
; EPILOG-BLOCK-NEXT:    ret i32 42
;
; PROLOG-LABEL: @hdr_latch_same_exit(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %n
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %sum.02.prol = phi i32 [ %add.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit1, label %for.exiting_block.prol
; PROLOG:       for.exiting_block.prol:
; PROLOG-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.prol, label %for.exit2.loopexit3, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %arrayidx.prol = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.prol
; PROLOG-NEXT:    %2 = load i32, ptr %arrayidx.prol, align 4
; PROLOG-NEXT:    %add.prol = add nsw i32 %2, %sum.02.prol
; PROLOG-NEXT:    %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT:    %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !4
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %result.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %result.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; PROLOG-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block
; PROLOG:       for.exiting_block:
; PROLOG-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.1
; PROLOG:       for.exiting_block.1:
; PROLOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.2
; PROLOG:       for.exiting_block.2:
; PROLOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.2, label %for.exit2.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; PROLOG-NEXT:    %6 = load i32, ptr %arrayidx.2, align 4
; PROLOG-NEXT:    %add.2 = add nsw i32 %6, %add.1
; PROLOG-NEXT:    %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.3
; PROLOG:       for.exiting_block.3:
; PROLOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.3, label %for.exit2.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; PROLOG-NEXT:    %7 = load i32, ptr %arrayidx.3, align 4
; PROLOG-NEXT:    %add.3 = add nsw i32 %7, %add.2
; PROLOG-NEXT:    %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.4
; PROLOG:       for.exiting_block.4:
; PROLOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.4, label %for.exit2.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; PROLOG-NEXT:    %8 = load i32, ptr %arrayidx.4, align 4
; PROLOG-NEXT:    %add.4 = add nsw i32 %8, %add.3
; PROLOG-NEXT:    %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.5
; PROLOG:       for.exiting_block.5:
; PROLOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.5, label %for.exit2.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; PROLOG-NEXT:    %9 = load i32, ptr %arrayidx.5, align 4
; PROLOG-NEXT:    %add.5 = add nsw i32 %9, %add.4
; PROLOG-NEXT:    %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.6
; PROLOG:       for.exiting_block.6:
; PROLOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.6, label %for.exit2.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; PROLOG-NEXT:    %10 = load i32, ptr %arrayidx.6, align 4
; PROLOG-NEXT:    %add.6 = add nsw i32 %10, %add.5
; PROLOG-NEXT:    %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.7
; PROLOG:       for.exiting_block.7:
; PROLOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.7, label %for.exit2.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; PROLOG-NEXT:    %11 = load i32, ptr %arrayidx.7, align 4
; PROLOG-NEXT:    %add.7 = add nsw i32 %11, %add.6
; PROLOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT:    %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT:    br i1 %exitcond.7, label %latchExit.unr-lcssa.loopexit, label %header
; PROLOG:       latchExit.unr-lcssa.loopexit:
; PROLOG-NEXT:    %result.ph.ph = phi i32 [ 0, %header ], [ 0, %latch ], [ 0, %latch.1 ], [ 0, %latch.2 ], [ 0, %latch.3 ], [ 0, %latch.4 ], [ 0, %latch.5 ], [ 0, %latch.6 ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa.loopexit1:
; PROLOG-NEXT:    %result.ph.ph2 = phi i32 [ 0, %header.prol ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa:
; PROLOG-NEXT:    %result.ph = phi i32 [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ], [ %result.ph.ph2, %latchExit.unr-lcssa.loopexit1 ]
; PROLOG-NEXT:    br label %latchExit
; PROLOG:       latchExit:
; PROLOG-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-NEXT:    ret i32 %result
; PROLOG:       for.exit2.loopexit:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2.loopexit3:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2:
; PROLOG-NEXT:    ret i32 42
;
; PROLOG-BLOCK-LABEL: @hdr_latch_same_exit(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %n
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %latchExit.unr-lcssa, label %for.exiting_block.prol
; PROLOG-BLOCK:       for.exiting_block.prol:
; PROLOG-BLOCK-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.prol, label %for.exit2, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    %2 = load i32, ptr %a, align 4
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block
; PROLOG-BLOCK:       for.exiting_block:
; PROLOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-BLOCK-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-BLOCK-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %latchExit.unr-lcssa.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK:       for.exiting_block.1:
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT:    %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT:    br i1 %exitcond.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !4
; PROLOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ 0, %header ], [ 0, %latch ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; PROLOG-BLOCK:       latchExit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %result.ph = phi i32 [ 0, %header.prol ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; PROLOG-BLOCK-NEXT:    br label %latchExit
; PROLOG-BLOCK:       latchExit:
; PROLOG-BLOCK-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i32 %result
; PROLOG-BLOCK:       for.exit2.loopexit:
; PROLOG-BLOCK-NEXT:    br label %for.exit2
; PROLOG-BLOCK:       for.exit2:
; PROLOG-BLOCK-NEXT:    ret i32 42
;

entry:
  br label %header

header:
  %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
  %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
  br i1 %cond, label %latchExit, label %for.exiting_block

for.exiting_block:
  %cmp = icmp eq i64 %n, 42
  br i1 %cmp, label %for.exit2, label %latch

latch:                                         ; preds = %latch, %entry
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %0, %sum.02
  %indvars.iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %latchExit, label %header

latchExit:                                          ; preds = %latch, %entry
  %result = phi i32 [ 0, %header ], [ %add, %latch ]
  ret i32 %result

for.exit2:
  ret i32 42
}

; Two exiting blocks to latch where the exiting blocks are Latch and a
; non-header
; FIXME: We should unroll this loop.
define i32 @otherblock_latch_same_exit(ptr nocapture %a, i64 %n, i1 %cond) {
; EPILOG-LABEL: @otherblock_latch_same_exit(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %n
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG:       for.exiting_block:
; EPILOG-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp, label %latchExit.epilog-lcssa.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG:       for.exiting_block.1:
; EPILOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.1, label %latchExit.epilog-lcssa.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-NEXT:    %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.2
; EPILOG:       for.exiting_block.2:
; EPILOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.2, label %latchExit.epilog-lcssa.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; EPILOG-NEXT:    %5 = load i32, ptr %arrayidx.2, align 4
; EPILOG-NEXT:    %add.2 = add nsw i32 %5, %add.1
; EPILOG-NEXT:    %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.3
; EPILOG:       for.exiting_block.3:
; EPILOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.3, label %latchExit.epilog-lcssa.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; EPILOG-NEXT:    %6 = load i32, ptr %arrayidx.3, align 4
; EPILOG-NEXT:    %add.3 = add nsw i32 %6, %add.2
; EPILOG-NEXT:    %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.4
; EPILOG:       for.exiting_block.4:
; EPILOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.4, label %latchExit.epilog-lcssa.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; EPILOG-NEXT:    %7 = load i32, ptr %arrayidx.4, align 4
; EPILOG-NEXT:    %add.4 = add nsw i32 %7, %add.3
; EPILOG-NEXT:    %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.5
; EPILOG:       for.exiting_block.5:
; EPILOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.5, label %latchExit.epilog-lcssa.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; EPILOG-NEXT:    %8 = load i32, ptr %arrayidx.5, align 4
; EPILOG-NEXT:    %add.5 = add nsw i32 %8, %add.4
; EPILOG-NEXT:    %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.6
; EPILOG:       for.exiting_block.6:
; EPILOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.6, label %latchExit.epilog-lcssa.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; EPILOG-NEXT:    %9 = load i32, ptr %arrayidx.6, align 4
; EPILOG-NEXT:    %add.6 = add nsw i32 %9, %add.5
; EPILOG-NEXT:    %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.7
; EPILOG:       for.exiting_block.7:
; EPILOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.7, label %latchExit.epilog-lcssa.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; EPILOG-NEXT:    %10 = load i32, ptr %arrayidx.7, align 4
; EPILOG-NEXT:    %add.7 = add nsw i32 %10, %add.6
; EPILOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %latchExit.unr-lcssa.loopexit, label %header
; EPILOG:       latchExit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    br label %latchExit.unr-lcssa
; EPILOG:       latchExit.unr-lcssa:
; EPILOG-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %latch.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %sum.02.epil = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit2, label %for.exiting_block.epil
; EPILOG:       for.exiting_block.epil:
; EPILOG-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.epil, label %latchExit.epilog-lcssa.loopexit3, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.epil
; EPILOG-NEXT:    %11 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-NEXT:    %add.epil = add nsw i32 %11, %sum.02.epil
; EPILOG-NEXT:    %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT:    %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latchExit.epilog-lcssa.loopexit3, !llvm.loop !5
; EPILOG:       latchExit.epilog-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph1.ph = phi i32 [ 2, %for.exiting_block ], [ 2, %for.exiting_block.1 ], [ 2, %for.exiting_block.2 ], [ 2, %for.exiting_block.3 ], [ 2, %for.exiting_block.4 ], [ 2, %for.exiting_block.5 ], [ 2, %for.exiting_block.6 ], [ 2, %for.exiting_block.7 ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa.loopexit3:
; EPILOG-NEXT:    %result.ph1.ph4 = phi i32 [ 2, %for.exiting_block.epil ], [ %add.epil, %latch.epil ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa:
; EPILOG-NEXT:    %result.ph1 = phi i32 [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ], [ %result.ph1.ph4, %latchExit.epilog-lcssa.loopexit3 ]
; EPILOG-NEXT:    br label %latchExit
; EPILOG:       latchExit:
; EPILOG-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-NEXT:    ret i32 %result
; EPILOG:       for.exit2.loopexit:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2.loopexit2:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2:
; EPILOG-NEXT:    ret i32 42
;
; EPILOG-BLOCK-LABEL: @otherblock_latch_same_exit(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %n
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG-BLOCK:       for.exiting_block:
; EPILOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp, label %latchExit.epilog-lcssa.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-BLOCK-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-BLOCK-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK:       for.exiting_block.1:
; EPILOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.1, label %latchExit.epilog-lcssa.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !5
; EPILOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; EPILOG-BLOCK:       latchExit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2, label %for.exiting_block.epil
; EPILOG-BLOCK:       for.exiting_block.epil:
; EPILOG-BLOCK-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.epil, label %latchExit.epilog-lcssa, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT:    %add.epil = add nsw i32 %5, %sum.02.unr
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph1.ph = phi i32 [ 2, %for.exiting_block ], [ 2, %for.exiting_block.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph1 = phi i32 [ %add.epil, %latch.epil ], [ 2, %for.exiting_block.epil ], [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    br label %latchExit
; EPILOG-BLOCK:       latchExit:
; EPILOG-BLOCK-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-BLOCK-NEXT:    ret i32 %result
; EPILOG-BLOCK:       for.exit2.loopexit:
; EPILOG-BLOCK-NEXT:    br label %for.exit2
; EPILOG-BLOCK:       for.exit2:
; EPILOG-BLOCK-NEXT:    ret i32 42
;
; PROLOG-LABEL: @otherblock_latch_same_exit(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %n
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %sum.02.prol = phi i32 [ %add.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit1, label %for.exiting_block.prol
; PROLOG:       for.exiting_block.prol:
; PROLOG-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.prol, label %latchExit.unr-lcssa.loopexit2, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %arrayidx.prol = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.prol
; PROLOG-NEXT:    %2 = load i32, ptr %arrayidx.prol, align 4
; PROLOG-NEXT:    %add.prol = add nsw i32 %2, %sum.02.prol
; PROLOG-NEXT:    %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT:    %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !5
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %result.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %result.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; PROLOG-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG:       for.exiting_block:
; PROLOG-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp, label %latchExit.unr-lcssa.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG:       for.exiting_block.1:
; PROLOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.1, label %latchExit.unr-lcssa.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.2
; PROLOG:       for.exiting_block.2:
; PROLOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.2, label %latchExit.unr-lcssa.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; PROLOG-NEXT:    %6 = load i32, ptr %arrayidx.2, align 4
; PROLOG-NEXT:    %add.2 = add nsw i32 %6, %add.1
; PROLOG-NEXT:    %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.3
; PROLOG:       for.exiting_block.3:
; PROLOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.3, label %latchExit.unr-lcssa.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; PROLOG-NEXT:    %7 = load i32, ptr %arrayidx.3, align 4
; PROLOG-NEXT:    %add.3 = add nsw i32 %7, %add.2
; PROLOG-NEXT:    %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.4
; PROLOG:       for.exiting_block.4:
; PROLOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.4, label %latchExit.unr-lcssa.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; PROLOG-NEXT:    %8 = load i32, ptr %arrayidx.4, align 4
; PROLOG-NEXT:    %add.4 = add nsw i32 %8, %add.3
; PROLOG-NEXT:    %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.5
; PROLOG:       for.exiting_block.5:
; PROLOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.5, label %latchExit.unr-lcssa.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; PROLOG-NEXT:    %9 = load i32, ptr %arrayidx.5, align 4
; PROLOG-NEXT:    %add.5 = add nsw i32 %9, %add.4
; PROLOG-NEXT:    %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.6
; PROLOG:       for.exiting_block.6:
; PROLOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.6, label %latchExit.unr-lcssa.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; PROLOG-NEXT:    %10 = load i32, ptr %arrayidx.6, align 4
; PROLOG-NEXT:    %add.6 = add nsw i32 %10, %add.5
; PROLOG-NEXT:    %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.7
; PROLOG:       for.exiting_block.7:
; PROLOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.7, label %latchExit.unr-lcssa.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; PROLOG-NEXT:    %11 = load i32, ptr %arrayidx.7, align 4
; PROLOG-NEXT:    %add.7 = add nsw i32 %11, %add.6
; PROLOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT:    %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT:    br i1 %exitcond.7, label %latchExit.unr-lcssa.loopexit, label %header
; PROLOG:       latchExit.unr-lcssa.loopexit:
; PROLOG-NEXT:    %result.ph.ph = phi i32 [ 2, %for.exiting_block ], [ 2, %for.exiting_block.1 ], [ 2, %for.exiting_block.2 ], [ 2, %for.exiting_block.3 ], [ 2, %for.exiting_block.4 ], [ 2, %for.exiting_block.5 ], [ 2, %for.exiting_block.6 ], [ 2, %for.exiting_block.7 ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa.loopexit2:
; PROLOG-NEXT:    %result.ph.ph3 = phi i32 [ 2, %for.exiting_block.prol ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa:
; PROLOG-NEXT:    %result.ph = phi i32 [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ], [ %result.ph.ph3, %latchExit.unr-lcssa.loopexit2 ]
; PROLOG-NEXT:    br label %latchExit
; PROLOG:       latchExit:
; PROLOG-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-NEXT:    ret i32 %result
; PROLOG:       for.exit2.loopexit:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2.loopexit1:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2:
; PROLOG-NEXT:    ret i32 42
;
; PROLOG-BLOCK-LABEL: @otherblock_latch_same_exit(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %n
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2, label %for.exiting_block.prol
; PROLOG-BLOCK:       for.exiting_block.prol:
; PROLOG-BLOCK-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.prol, label %latchExit.unr-lcssa, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    %2 = load i32, ptr %a, align 4
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG-BLOCK:       for.exiting_block:
; PROLOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp, label %latchExit.unr-lcssa.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-BLOCK-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-BLOCK-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK:       for.exiting_block.1:
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %latchExit.unr-lcssa.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT:    %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT:    br i1 %exitcond.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !5
; PROLOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ 2, %for.exiting_block ], [ 2, %for.exiting_block.1 ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; PROLOG-BLOCK:       latchExit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %result.ph = phi i32 [ 2, %for.exiting_block.prol ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; PROLOG-BLOCK-NEXT:    br label %latchExit
; PROLOG-BLOCK:       latchExit:
; PROLOG-BLOCK-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i32 %result
; PROLOG-BLOCK:       for.exit2.loopexit:
; PROLOG-BLOCK-NEXT:    br label %for.exit2
; PROLOG-BLOCK:       for.exit2:
; PROLOG-BLOCK-NEXT:    ret i32 42
;

entry:
  br label %header

header:
  %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
  %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
  br i1 %cond, label %for.exit2, label %for.exiting_block

for.exiting_block:
  %cmp = icmp eq i64 %n, 42
  br i1 %cmp, label %latchExit, label %latch

latch:                                         ; preds = %latch, %entry
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %0, %sum.02
  %indvars.iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %latchExit, label %header

latchExit:                                          ; preds = %latch, %entry
  %result = phi i32 [ 2, %for.exiting_block ], [ %add, %latch ]
  ret i32 %result

for.exit2:
  ret i32 42
}

; Two exiting blocks to latch where the exiting blocks are Latch and a
; non-header
; Same as above test except the incoming value for latch Phi is from the header
; FIXME: We should be able to runtime unroll.
define i32 @otherblock_latch_same_exit2(ptr nocapture %a, i64 %n, i1 %cond) {
; EPILOG-LABEL: @otherblock_latch_same_exit2(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %n
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG:       for.exiting_block:
; EPILOG-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp, label %latchExit.epilog-lcssa.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG:       for.exiting_block.1:
; EPILOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.1, label %latchExit.epilog-lcssa.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-NEXT:    %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.2
; EPILOG:       for.exiting_block.2:
; EPILOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.2, label %latchExit.epilog-lcssa.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; EPILOG-NEXT:    %5 = load i32, ptr %arrayidx.2, align 4
; EPILOG-NEXT:    %add.2 = add nsw i32 %5, %add.1
; EPILOG-NEXT:    %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.3
; EPILOG:       for.exiting_block.3:
; EPILOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.3, label %latchExit.epilog-lcssa.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; EPILOG-NEXT:    %6 = load i32, ptr %arrayidx.3, align 4
; EPILOG-NEXT:    %add.3 = add nsw i32 %6, %add.2
; EPILOG-NEXT:    %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.4
; EPILOG:       for.exiting_block.4:
; EPILOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.4, label %latchExit.epilog-lcssa.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; EPILOG-NEXT:    %7 = load i32, ptr %arrayidx.4, align 4
; EPILOG-NEXT:    %add.4 = add nsw i32 %7, %add.3
; EPILOG-NEXT:    %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.5
; EPILOG:       for.exiting_block.5:
; EPILOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.5, label %latchExit.epilog-lcssa.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; EPILOG-NEXT:    %8 = load i32, ptr %arrayidx.5, align 4
; EPILOG-NEXT:    %add.5 = add nsw i32 %8, %add.4
; EPILOG-NEXT:    %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.6
; EPILOG:       for.exiting_block.6:
; EPILOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.6, label %latchExit.epilog-lcssa.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; EPILOG-NEXT:    %9 = load i32, ptr %arrayidx.6, align 4
; EPILOG-NEXT:    %add.6 = add nsw i32 %9, %add.5
; EPILOG-NEXT:    %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.7
; EPILOG:       for.exiting_block.7:
; EPILOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.7, label %latchExit.epilog-lcssa.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; EPILOG-NEXT:    %10 = load i32, ptr %arrayidx.7, align 4
; EPILOG-NEXT:    %add.7 = add nsw i32 %10, %add.6
; EPILOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %latchExit.unr-lcssa.loopexit, label %header
; EPILOG:       latchExit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    br label %latchExit.unr-lcssa
; EPILOG:       latchExit.unr-lcssa:
; EPILOG-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %latch.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %sum.02.epil = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit2, label %for.exiting_block.epil
; EPILOG:       for.exiting_block.epil:
; EPILOG-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.epil, label %latchExit.epilog-lcssa.loopexit3, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.epil
; EPILOG-NEXT:    %11 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-NEXT:    %add.epil = add nsw i32 %11, %sum.02.epil
; EPILOG-NEXT:    %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT:    %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latchExit.epilog-lcssa.loopexit3, !llvm.loop !6
; EPILOG:       latchExit.epilog-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph1.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %for.exiting_block.2 ], [ %add.2, %for.exiting_block.3 ], [ %add.3, %for.exiting_block.4 ], [ %add.4, %for.exiting_block.5 ], [ %add.5, %for.exiting_block.6 ], [ %add.6, %for.exiting_block.7 ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa.loopexit3:
; EPILOG-NEXT:    %result.ph1.ph4 = phi i32 [ %sum.02.epil, %for.exiting_block.epil ], [ %add.epil, %latch.epil ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa:
; EPILOG-NEXT:    %result.ph1 = phi i32 [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ], [ %result.ph1.ph4, %latchExit.epilog-lcssa.loopexit3 ]
; EPILOG-NEXT:    br label %latchExit
; EPILOG:       latchExit:
; EPILOG-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-NEXT:    ret i32 %result
; EPILOG:       for.exit2.loopexit:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2.loopexit2:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2:
; EPILOG-NEXT:    ret i32 42
;
; EPILOG-BLOCK-LABEL: @otherblock_latch_same_exit2(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %n
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG-BLOCK:       for.exiting_block:
; EPILOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp, label %latchExit.epilog-lcssa.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-BLOCK-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-BLOCK-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK:       for.exiting_block.1:
; EPILOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.1, label %latchExit.epilog-lcssa.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !6
; EPILOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; EPILOG-BLOCK:       latchExit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2, label %for.exiting_block.epil
; EPILOG-BLOCK:       for.exiting_block.epil:
; EPILOG-BLOCK-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.epil, label %latchExit.epilog-lcssa, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT:    %add.epil = add nsw i32 %5, %sum.02.unr
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph1.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph1 = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %for.exiting_block.epil ], [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    br label %latchExit
; EPILOG-BLOCK:       latchExit:
; EPILOG-BLOCK-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-BLOCK-NEXT:    ret i32 %result
; EPILOG-BLOCK:       for.exit2.loopexit:
; EPILOG-BLOCK-NEXT:    br label %for.exit2
; EPILOG-BLOCK:       for.exit2:
; EPILOG-BLOCK-NEXT:    ret i32 42
;
; PROLOG-LABEL: @otherblock_latch_same_exit2(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %n
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %sum.02.prol = phi i32 [ %add.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit1, label %for.exiting_block.prol
; PROLOG:       for.exiting_block.prol:
; PROLOG-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.prol, label %latchExit.unr-lcssa.loopexit2, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %arrayidx.prol = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.prol
; PROLOG-NEXT:    %2 = load i32, ptr %arrayidx.prol, align 4
; PROLOG-NEXT:    %add.prol = add nsw i32 %2, %sum.02.prol
; PROLOG-NEXT:    %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT:    %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !6
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %result.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %result.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; PROLOG-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG:       for.exiting_block:
; PROLOG-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp, label %latchExit.unr-lcssa.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG:       for.exiting_block.1:
; PROLOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.1, label %latchExit.unr-lcssa.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.2
; PROLOG:       for.exiting_block.2:
; PROLOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.2, label %latchExit.unr-lcssa.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; PROLOG-NEXT:    %6 = load i32, ptr %arrayidx.2, align 4
; PROLOG-NEXT:    %add.2 = add nsw i32 %6, %add.1
; PROLOG-NEXT:    %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.3
; PROLOG:       for.exiting_block.3:
; PROLOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.3, label %latchExit.unr-lcssa.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; PROLOG-NEXT:    %7 = load i32, ptr %arrayidx.3, align 4
; PROLOG-NEXT:    %add.3 = add nsw i32 %7, %add.2
; PROLOG-NEXT:    %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.4
; PROLOG:       for.exiting_block.4:
; PROLOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.4, label %latchExit.unr-lcssa.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; PROLOG-NEXT:    %8 = load i32, ptr %arrayidx.4, align 4
; PROLOG-NEXT:    %add.4 = add nsw i32 %8, %add.3
; PROLOG-NEXT:    %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.5
; PROLOG:       for.exiting_block.5:
; PROLOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.5, label %latchExit.unr-lcssa.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; PROLOG-NEXT:    %9 = load i32, ptr %arrayidx.5, align 4
; PROLOG-NEXT:    %add.5 = add nsw i32 %9, %add.4
; PROLOG-NEXT:    %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.6
; PROLOG:       for.exiting_block.6:
; PROLOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.6, label %latchExit.unr-lcssa.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; PROLOG-NEXT:    %10 = load i32, ptr %arrayidx.6, align 4
; PROLOG-NEXT:    %add.6 = add nsw i32 %10, %add.5
; PROLOG-NEXT:    %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.7
; PROLOG:       for.exiting_block.7:
; PROLOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.7, label %latchExit.unr-lcssa.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; PROLOG-NEXT:    %11 = load i32, ptr %arrayidx.7, align 4
; PROLOG-NEXT:    %add.7 = add nsw i32 %11, %add.6
; PROLOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT:    %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT:    br i1 %exitcond.7, label %latchExit.unr-lcssa.loopexit, label %header
; PROLOG:       latchExit.unr-lcssa.loopexit:
; PROLOG-NEXT:    %result.ph.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %for.exiting_block.2 ], [ %add.2, %for.exiting_block.3 ], [ %add.3, %for.exiting_block.4 ], [ %add.4, %for.exiting_block.5 ], [ %add.5, %for.exiting_block.6 ], [ %add.6, %for.exiting_block.7 ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa.loopexit2:
; PROLOG-NEXT:    %result.ph.ph3 = phi i32 [ %sum.02.prol, %for.exiting_block.prol ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa:
; PROLOG-NEXT:    %result.ph = phi i32 [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ], [ %result.ph.ph3, %latchExit.unr-lcssa.loopexit2 ]
; PROLOG-NEXT:    br label %latchExit
; PROLOG:       latchExit:
; PROLOG-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-NEXT:    ret i32 %result
; PROLOG:       for.exit2.loopexit:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2.loopexit1:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2:
; PROLOG-NEXT:    ret i32 42
;
; PROLOG-BLOCK-LABEL: @otherblock_latch_same_exit2(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %n
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2, label %for.exiting_block.prol
; PROLOG-BLOCK:       for.exiting_block.prol:
; PROLOG-BLOCK-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.prol, label %latchExit.unr-lcssa, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    %2 = load i32, ptr %a, align 4
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG-BLOCK:       for.exiting_block:
; PROLOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp, label %latchExit.unr-lcssa.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-BLOCK-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-BLOCK-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK:       for.exiting_block.1:
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %latchExit.unr-lcssa.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT:    %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT:    br i1 %exitcond.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !6
; PROLOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; PROLOG-BLOCK:       latchExit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %result.ph = phi i32 [ 0, %for.exiting_block.prol ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; PROLOG-BLOCK-NEXT:    br label %latchExit
; PROLOG-BLOCK:       latchExit:
; PROLOG-BLOCK-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i32 %result
; PROLOG-BLOCK:       for.exit2.loopexit:
; PROLOG-BLOCK-NEXT:    br label %for.exit2
; PROLOG-BLOCK:       for.exit2:
; PROLOG-BLOCK-NEXT:    ret i32 42
;

entry:
  br label %header

header:
  %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
  %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
  br i1 %cond, label %for.exit2, label %for.exiting_block

for.exiting_block:
  %cmp = icmp eq i64 %n, 42
  br i1 %cmp, label %latchExit, label %latch

latch:                                         ; preds = %latch, %entry
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %0, %sum.02
  %indvars.iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %latchExit, label %header

latchExit:                                          ; preds = %latch, %entry
  %result = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %latch ]
  ret i32 %result

for.exit2:
  ret i32 42
}

; Two exiting blocks to latch where the exiting blocks are Latch and a
; non-header
; Same as above test except the incoming value for cloned latch Phi is from the
; for.exiting_block.
; FIXME: We should be able to runtime unroll.
define i32 @otherblock_latch_same_exit3(ptr nocapture %a, i64 %n, i1 %cond) {
; EPILOG-LABEL: @otherblock_latch_same_exit3(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %n
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG:       for.exiting_block:
; EPILOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp, label %latchExit.epilog-lcssa.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG:       for.exiting_block.1:
; EPILOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.1, label %latchExit.epilog-lcssa.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.2
; EPILOG:       for.exiting_block.2:
; EPILOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; EPILOG-NEXT:    %5 = load i32, ptr %arrayidx.2, align 4
; EPILOG-NEXT:    %add.2 = add nsw i32 %5, %add.1
; EPILOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.2, label %latchExit.epilog-lcssa.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.3
; EPILOG:       for.exiting_block.3:
; EPILOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; EPILOG-NEXT:    %6 = load i32, ptr %arrayidx.3, align 4
; EPILOG-NEXT:    %add.3 = add nsw i32 %6, %add.2
; EPILOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.3, label %latchExit.epilog-lcssa.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.4
; EPILOG:       for.exiting_block.4:
; EPILOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; EPILOG-NEXT:    %7 = load i32, ptr %arrayidx.4, align 4
; EPILOG-NEXT:    %add.4 = add nsw i32 %7, %add.3
; EPILOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.4, label %latchExit.epilog-lcssa.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.5
; EPILOG:       for.exiting_block.5:
; EPILOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; EPILOG-NEXT:    %8 = load i32, ptr %arrayidx.5, align 4
; EPILOG-NEXT:    %add.5 = add nsw i32 %8, %add.4
; EPILOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.5, label %latchExit.epilog-lcssa.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.6
; EPILOG:       for.exiting_block.6:
; EPILOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; EPILOG-NEXT:    %9 = load i32, ptr %arrayidx.6, align 4
; EPILOG-NEXT:    %add.6 = add nsw i32 %9, %add.5
; EPILOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.6, label %latchExit.epilog-lcssa.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.7
; EPILOG:       for.exiting_block.7:
; EPILOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; EPILOG-NEXT:    %10 = load i32, ptr %arrayidx.7, align 4
; EPILOG-NEXT:    %add.7 = add nsw i32 %10, %add.6
; EPILOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.7, label %latchExit.epilog-lcssa.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %latchExit.unr-lcssa.loopexit, label %header
; EPILOG:       latchExit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    br label %latchExit.unr-lcssa
; EPILOG:       latchExit.unr-lcssa:
; EPILOG-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %latch.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %sum.02.epil = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    br i1 %cond, label %for.exit2.loopexit2, label %for.exiting_block.epil
; EPILOG:       for.exiting_block.epil:
; EPILOG-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.epil
; EPILOG-NEXT:    %11 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-NEXT:    %add.epil = add nsw i32 %11, %sum.02.epil
; EPILOG-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.epil, label %latchExit.epilog-lcssa.loopexit3, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT:    %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latchExit.epilog-lcssa.loopexit3, !llvm.loop !7
; EPILOG:       latchExit.epilog-lcssa.loopexit:
; EPILOG-NEXT:    %result.ph1.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %for.exiting_block.2 ], [ %add.2, %for.exiting_block.3 ], [ %add.3, %for.exiting_block.4 ], [ %add.4, %for.exiting_block.5 ], [ %add.5, %for.exiting_block.6 ], [ %add.6, %for.exiting_block.7 ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa.loopexit3:
; EPILOG-NEXT:    %result.ph1.ph4 = phi i32 [ %sum.02.epil, %for.exiting_block.epil ], [ %add.epil, %latch.epil ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa:
; EPILOG-NEXT:    %result.ph1 = phi i32 [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ], [ %result.ph1.ph4, %latchExit.epilog-lcssa.loopexit3 ]
; EPILOG-NEXT:    br label %latchExit
; EPILOG:       latchExit:
; EPILOG-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-NEXT:    ret i32 %result
; EPILOG:       for.exit2.loopexit:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2.loopexit2:
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2:
; EPILOG-NEXT:    ret i32 42
;
; EPILOG-BLOCK-LABEL: @otherblock_latch_same_exit3(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %n
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG-BLOCK:       for.exiting_block:
; EPILOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT:    %3 = load i32, ptr %arrayidx, align 4
; EPILOG-BLOCK-NEXT:    %add = add nsw i32 %3, %sum.02
; EPILOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp, label %latchExit.epilog-lcssa.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK:       for.exiting_block.1:
; EPILOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT:    %add.1 = add nsw i32 %4, %add
; EPILOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.1, label %latchExit.epilog-lcssa.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !7
; EPILOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; EPILOG-BLOCK:       latchExit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph = phi i32 [ undef, %entry ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2, label %for.exiting_block.epil
; EPILOG-BLOCK:       for.exiting_block.epil:
; EPILOG-BLOCK-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT:    %add.epil = add nsw i32 %5, %sum.02.unr
; EPILOG-BLOCK-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.epil, label %latchExit.epilog-lcssa, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph1.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    %result.ph1 = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %for.exiting_block.epil ], [ %result.ph1.ph, %latchExit.epilog-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    br label %latchExit
; EPILOG-BLOCK:       latchExit:
; EPILOG-BLOCK-NEXT:    %result = phi i32 [ %result.ph, %latchExit.unr-lcssa ], [ %result.ph1, %latchExit.epilog-lcssa ]
; EPILOG-BLOCK-NEXT:    ret i32 %result
; EPILOG-BLOCK:       for.exit2.loopexit:
; EPILOG-BLOCK-NEXT:    br label %for.exit2
; EPILOG-BLOCK:       for.exit2:
; EPILOG-BLOCK-NEXT:    ret i32 42
;
; PROLOG-LABEL: @otherblock_latch_same_exit3(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %n
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %sum.02.prol = phi i32 [ %add.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit1, label %for.exiting_block.prol
; PROLOG:       for.exiting_block.prol:
; PROLOG-NEXT:    %arrayidx.prol = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.prol
; PROLOG-NEXT:    %2 = load i32, ptr %arrayidx.prol, align 4
; PROLOG-NEXT:    %add.prol = add nsw i32 %2, %sum.02.prol
; PROLOG-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.prol, label %latchExit.unr-lcssa.loopexit2, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT:    %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !7
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %result.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %result.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; PROLOG-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG:       for.exiting_block:
; PROLOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp, label %latchExit.unr-lcssa.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG:       for.exiting_block.1:
; PROLOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.1, label %latchExit.unr-lcssa.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.2
; PROLOG:       for.exiting_block.2:
; PROLOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; PROLOG-NEXT:    %6 = load i32, ptr %arrayidx.2, align 4
; PROLOG-NEXT:    %add.2 = add nsw i32 %6, %add.1
; PROLOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.2, label %latchExit.unr-lcssa.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.3
; PROLOG:       for.exiting_block.3:
; PROLOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; PROLOG-NEXT:    %7 = load i32, ptr %arrayidx.3, align 4
; PROLOG-NEXT:    %add.3 = add nsw i32 %7, %add.2
; PROLOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.3, label %latchExit.unr-lcssa.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.4
; PROLOG:       for.exiting_block.4:
; PROLOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; PROLOG-NEXT:    %8 = load i32, ptr %arrayidx.4, align 4
; PROLOG-NEXT:    %add.4 = add nsw i32 %8, %add.3
; PROLOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.4, label %latchExit.unr-lcssa.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.5
; PROLOG:       for.exiting_block.5:
; PROLOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; PROLOG-NEXT:    %9 = load i32, ptr %arrayidx.5, align 4
; PROLOG-NEXT:    %add.5 = add nsw i32 %9, %add.4
; PROLOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.5, label %latchExit.unr-lcssa.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.6
; PROLOG:       for.exiting_block.6:
; PROLOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; PROLOG-NEXT:    %10 = load i32, ptr %arrayidx.6, align 4
; PROLOG-NEXT:    %add.6 = add nsw i32 %10, %add.5
; PROLOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.6, label %latchExit.unr-lcssa.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.7
; PROLOG:       for.exiting_block.7:
; PROLOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; PROLOG-NEXT:    %11 = load i32, ptr %arrayidx.7, align 4
; PROLOG-NEXT:    %add.7 = add nsw i32 %11, %add.6
; PROLOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.7, label %latchExit.unr-lcssa.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT:    %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT:    br i1 %exitcond.7, label %latchExit.unr-lcssa.loopexit, label %header
; PROLOG:       latchExit.unr-lcssa.loopexit:
; PROLOG-NEXT:    %result.ph.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %for.exiting_block.2 ], [ %add.2, %for.exiting_block.3 ], [ %add.3, %for.exiting_block.4 ], [ %add.4, %for.exiting_block.5 ], [ %add.5, %for.exiting_block.6 ], [ %add.6, %for.exiting_block.7 ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa.loopexit2:
; PROLOG-NEXT:    %result.ph.ph3 = phi i32 [ %sum.02.prol, %for.exiting_block.prol ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa:
; PROLOG-NEXT:    %result.ph = phi i32 [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ], [ %result.ph.ph3, %latchExit.unr-lcssa.loopexit2 ]
; PROLOG-NEXT:    br label %latchExit
; PROLOG:       latchExit:
; PROLOG-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-NEXT:    ret i32 %result
; PROLOG:       for.exit2.loopexit:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2.loopexit1:
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2:
; PROLOG-NEXT:    ret i32 42
;
; PROLOG-BLOCK-LABEL: @otherblock_latch_same_exit3(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %n
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2, label %for.exiting_block.prol
; PROLOG-BLOCK:       for.exiting_block.prol:
; PROLOG-BLOCK-NEXT:    %2 = load i32, ptr %a, align 4
; PROLOG-BLOCK-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.prol, label %latchExit.unr-lcssa, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %result.unr = phi i32 [ undef, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %latchExit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG-BLOCK:       for.exiting_block:
; PROLOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT:    %4 = load i32, ptr %arrayidx, align 4
; PROLOG-BLOCK-NEXT:    %add = add nsw i32 %4, %sum.02
; PROLOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp, label %latchExit.unr-lcssa.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK:       for.exiting_block.1:
; PROLOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT:    %5 = load i32, ptr %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT:    %add.1 = add nsw i32 %5, %add
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %latchExit.unr-lcssa.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT:    %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT:    br i1 %exitcond.1, label %latchExit.unr-lcssa.loopexit, label %header, !llvm.loop !7
; PROLOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    %result.ph.ph = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %for.exiting_block.1 ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; PROLOG-BLOCK:       latchExit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %result.ph = phi i32 [ 0, %for.exiting_block.prol ], [ %result.ph.ph, %latchExit.unr-lcssa.loopexit ]
; PROLOG-BLOCK-NEXT:    br label %latchExit
; PROLOG-BLOCK:       latchExit:
; PROLOG-BLOCK-NEXT:    %result = phi i32 [ %result.unr, %header.prol.loopexit ], [ %result.ph, %latchExit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i32 %result
; PROLOG-BLOCK:       for.exit2.loopexit:
; PROLOG-BLOCK-NEXT:    br label %for.exit2
; PROLOG-BLOCK:       for.exit2:
; PROLOG-BLOCK-NEXT:    ret i32 42
;

entry:
  br label %header

header:
  %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
  %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
  br i1 %cond, label %for.exit2, label %for.exiting_block

for.exiting_block:
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %0, %sum.02
  %cmp = icmp eq i64 %n, 42
  br i1 %cmp, label %latchExit, label %latch

latch:                                         ; preds = %latch, %entry
  %indvars.iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %latchExit, label %header

latchExit:                                          ; preds = %latch, %entry
  %result = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %latch ]
  ret i32 %result

for.exit2:
  ret i32 42
}

; Show a case where we have multiple exits, but (provably) exit on the
; first iteration and thus have nothing to unroll
define void @non_loop(i32 %arg) {
; CHECK-LABEL: @non_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    %i = icmp sgt i32 undef, %arg
; CHECK-NEXT:    br i1 %i, label %preheader, label %returnblock
; CHECK:       preheader:
; CHECK-NEXT:    br label %header
; CHECK:       header:
; CHECK-NEXT:    br i1 true, label %latchExit, label %latch
; CHECK:       latch:
; CHECK-NEXT:    br label %latchExit
; CHECK:       latchExit:
; CHECK-NEXT:    %i2.ph = phi i32 [ %arg, %header ], [ -1, %latch ]
; CHECK-NEXT:    br label %returnblock
; CHECK:       returnblock:
; CHECK-NEXT:    %i2 = phi i32 [ -1, %entry ], [ %i2.ph, %latchExit ]
; CHECK-NEXT:    ret void
;

entry:
  %i = icmp sgt i32 undef, %arg
  br i1 %i, label %preheader, label %returnblock

preheader:                                 ; preds = %entry
  br label %header

header:                                           ; preds = %preheader, %latch
  %i4 = phi i32 [ %inc, %latch ], [ %arg, %preheader ]
  %inc = add nsw i32 %i4, 1
  br i1 true, label %latchExit, label %latch

latch:                                            ; preds = %header
  %cmp = icmp slt i32 %inc, undef
  br i1 %cmp, label %header, label %latchExit

latchExit:                                ; preds = %header, %latch
  %i2.ph = phi i32 [ %i4, %header ], [ -1, %latch ]
  br label %returnblock

returnblock:                                         ; preds = %latchExit, %entry
  %i2 = phi i32 [ -1, %entry ], [ %i2.ph, %latchExit ]
  ret void
}

; Latch exit is shared by all exiting blocks
define void @unique_exit(i32 %N, i32 %M) {
; EPILOG-LABEL: @unique_exit(
; EPILOG-NEXT:  preheader:
; EPILOG-NEXT:    %M.shifted = shl i32 %M, 3
; EPILOG-NEXT:    %umax = call i32 @llvm.umax.i32(i32 %M.shifted, i32 1)
; EPILOG-NEXT:    %0 = freeze i32 %umax
; EPILOG-NEXT:    %1 = add i32 %0, -1
; EPILOG-NEXT:    %xtraiter = and i32 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i32 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %preheader.new
; EPILOG:       preheader.new:
; EPILOG-NEXT:    %unroll_iter = sub i32 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %i4 = phi i32 [ 0, %preheader.new ], [ %inc.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i32 [ 0, %preheader.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    %inc = add nuw nsw i32 %i4, 1
; EPILOG-NEXT:    %cmp1 = icmp ult i32 %inc, %N
; EPILOG-NEXT:    br i1 %cmp1, label %latch, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch:
; EPILOG-NEXT:    %niter.next = add nuw nsw i32 %niter, 1
; EPILOG-NEXT:    %inc.1 = add nuw nsw i32 %inc, 1
; EPILOG-NEXT:    %cmp1.1 = icmp ult i32 %inc.1, %N
; EPILOG-NEXT:    br i1 %cmp1.1, label %latch.1, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.1:
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i32 %niter.next, 1
; EPILOG-NEXT:    %inc.2 = add nuw nsw i32 %inc.1, 1
; EPILOG-NEXT:    %cmp1.2 = icmp ult i32 %inc.2, %N
; EPILOG-NEXT:    br i1 %cmp1.2, label %latch.2, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.2:
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i32 %niter.next.1, 1
; EPILOG-NEXT:    %inc.3 = add nuw nsw i32 %inc.2, 1
; EPILOG-NEXT:    %cmp1.3 = icmp ult i32 %inc.3, %N
; EPILOG-NEXT:    br i1 %cmp1.3, label %latch.3, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.3:
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i32 %niter.next.2, 1
; EPILOG-NEXT:    %inc.4 = add nuw nsw i32 %inc.3, 1
; EPILOG-NEXT:    %cmp1.4 = icmp ult i32 %inc.4, %N
; EPILOG-NEXT:    br i1 %cmp1.4, label %latch.4, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.4:
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i32 %niter.next.3, 1
; EPILOG-NEXT:    %inc.5 = add nuw nsw i32 %inc.4, 1
; EPILOG-NEXT:    %cmp1.5 = icmp ult i32 %inc.5, %N
; EPILOG-NEXT:    br i1 %cmp1.5, label %latch.5, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.5:
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i32 %niter.next.4, 1
; EPILOG-NEXT:    %inc.6 = add nuw nsw i32 %inc.5, 1
; EPILOG-NEXT:    %cmp1.6 = icmp ult i32 %inc.6, %N
; EPILOG-NEXT:    br i1 %cmp1.6, label %latch.6, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.6:
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i32 %niter.next.5, 1
; EPILOG-NEXT:    %inc.7 = add nuw i32 %inc.6, 1
; EPILOG-NEXT:    %cmp1.7 = icmp ult i32 %inc.7, %N
; EPILOG-NEXT:    br i1 %cmp1.7, label %latch.7, label %latchExit.epilog-lcssa.loopexit
; EPILOG:       latch.7:
; EPILOG-NEXT:    %niter.next.7 = add nuw i32 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i32 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %header, label %latchExit.unr-lcssa.loopexit
; EPILOG:       latchExit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %i2.ph.ph.ph = phi i32 [ -1, %latch.7 ]
; EPILOG-NEXT:    %i4.unr.ph = phi i32 [ %inc.7, %latch.7 ]
; EPILOG-NEXT:    br label %latchExit.unr-lcssa
; EPILOG:       latchExit.unr-lcssa:
; EPILOG-NEXT:    %i2.ph.ph = phi i32 [ undef, %preheader ], [ %i2.ph.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %i4.unr = phi i32 [ 0, %preheader ], [ %i4.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %i4.epil = phi i32 [ %inc.epil, %latch.epil ], [ %i4.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i32 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    %inc.epil = add nuw i32 %i4.epil, 1
; EPILOG-NEXT:    %cmp1.epil = icmp ult i32 %inc.epil, %N
; EPILOG-NEXT:    br i1 %cmp1.epil, label %latch.epil, label %latchExit.epilog-lcssa.loopexit2
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %cmp.epil = icmp ult i32 %inc.epil, %M.shifted
; EPILOG-NEXT:    %epil.iter.next = add i32 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i32 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latchExit.epilog-lcssa.loopexit2, !llvm.loop !8
; EPILOG:       latchExit.epilog-lcssa.loopexit:
; EPILOG-NEXT:    %i2.ph.ph1.ph = phi i32 [ %i4, %header ], [ %inc, %latch ], [ %inc.1, %latch.1 ], [ %inc.2, %latch.2 ], [ %inc.3, %latch.3 ], [ %inc.4, %latch.4 ], [ %inc.5, %latch.5 ], [ %inc.6, %latch.6 ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa.loopexit2:
; EPILOG-NEXT:    %i2.ph.ph1.ph3 = phi i32 [ %i4.epil, %header.epil ], [ -1, %latch.epil ]
; EPILOG-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG:       latchExit.epilog-lcssa:
; EPILOG-NEXT:    %i2.ph.ph1 = phi i32 [ %i2.ph.ph1.ph, %latchExit.epilog-lcssa.loopexit ], [ %i2.ph.ph1.ph3, %latchExit.epilog-lcssa.loopexit2 ]
; EPILOG-NEXT:    br label %latchExit
; EPILOG:       latchExit:
; EPILOG-NEXT:    %i2.ph = phi i32 [ %i2.ph.ph, %latchExit.unr-lcssa ], [ %i2.ph.ph1, %latchExit.epilog-lcssa ]
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @unique_exit(
; EPILOG-BLOCK-NEXT:  preheader:
; EPILOG-BLOCK-NEXT:    %M.shifted = shl i32 %M, 3
; EPILOG-BLOCK-NEXT:    %umax = call i32 @llvm.umax.i32(i32 %M.shifted, i32 1)
; EPILOG-BLOCK-NEXT:    %0 = freeze i32 %umax
; EPILOG-BLOCK-NEXT:    %1 = add i32 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i32 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i32 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latchExit.unr-lcssa, label %preheader.new
; EPILOG-BLOCK:       preheader.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i32 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %i4 = phi i32 [ 0, %preheader.new ], [ %inc.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i32 [ 0, %preheader.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %inc = add nuw nsw i32 %i4, 1
; EPILOG-BLOCK-NEXT:    %cmp1 = icmp ult i32 %inc, %N
; EPILOG-BLOCK-NEXT:    br i1 %cmp1, label %latch, label %latchExit.epilog-lcssa.loopexit
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i32 %niter, 1
; EPILOG-BLOCK-NEXT:    %inc.1 = add nuw i32 %inc, 1
; EPILOG-BLOCK-NEXT:    %cmp1.1 = icmp ult i32 %inc.1, %N
; EPILOG-BLOCK-NEXT:    br i1 %cmp1.1, label %latch.1, label %latchExit.epilog-lcssa.loopexit
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add nuw i32 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i32 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %header, label %latchExit.unr-lcssa.loopexit, !llvm.loop !8
; EPILOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %i2.ph.ph.ph = phi i32 [ -1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %i4.unr.ph = phi i32 [ %inc.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; EPILOG-BLOCK:       latchExit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %i2.ph.ph = phi i32 [ undef, %preheader ], [ %i2.ph.ph.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %i4.unr = phi i32 [ 0, %preheader ], [ %i4.unr.ph, %latchExit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchExit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    %inc.epil = add nuw i32 %i4.unr, 1
; EPILOG-BLOCK-NEXT:    %cmp1.epil = icmp ult i32 %inc.epil, %N
; EPILOG-BLOCK-NEXT:    br i1 %cmp1.epil, label %latch.epil, label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %i2.ph.ph1.ph = phi i32 [ %i4, %header ], [ %inc, %latch ]
; EPILOG-BLOCK-NEXT:    br label %latchExit.epilog-lcssa
; EPILOG-BLOCK:       latchExit.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    %i2.ph.ph1 = phi i32 [ -1, %latch.epil ], [ %i4.unr, %header.epil ], [ %i2.ph.ph1.ph, %latchExit.epilog-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    br label %latchExit
; EPILOG-BLOCK:       latchExit:
; EPILOG-BLOCK-NEXT:    %i2.ph = phi i32 [ %i2.ph.ph, %latchExit.unr-lcssa ], [ %i2.ph.ph1, %latchExit.epilog-lcssa ]
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @unique_exit(
; PROLOG-NEXT:  preheader:
; PROLOG-NEXT:    %M.shifted = shl i32 %M, 3
; PROLOG-NEXT:    %umax = call i32 @llvm.umax.i32(i32 %M.shifted, i32 1)
; PROLOG-NEXT:    %0 = freeze i32 %umax
; PROLOG-NEXT:    %1 = add i32 %0, -1
; PROLOG-NEXT:    %xtraiter = and i32 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %i4.prol = phi i32 [ %inc.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i32 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    %inc.prol = add nuw i32 %i4.prol, 1
; PROLOG-NEXT:    %cmp1.prol = icmp ult i32 %inc.prol, %N
; PROLOG-NEXT:    br i1 %cmp1.prol, label %latch.prol, label %latchExit.unr-lcssa.loopexit1
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %cmp.prol = icmp ult i32 %inc.prol, %M.shifted
; PROLOG-NEXT:    %prol.iter.next = add i32 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i32 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !8
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %i4.unr.ph = phi i32 [ %inc.prol, %latch.prol ]
; PROLOG-NEXT:    %i2.ph.unr.ph = phi i32 [ -1, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %i4.unr = phi i32 [ 0, %preheader ], [ %i4.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %i2.ph.unr = phi i32 [ undef, %preheader ], [ %i2.ph.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i32 %1, 7
; PROLOG-NEXT:    br i1 %2, label %latchExit, label %preheader.new
; PROLOG:       preheader.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %i4 = phi i32 [ %i4.unr, %preheader.new ], [ %inc.7, %latch.7 ]
; PROLOG-NEXT:    %inc = add nuw i32 %i4, 1
; PROLOG-NEXT:    %cmp1 = icmp ult i32 %inc, %N
; PROLOG-NEXT:    br i1 %cmp1, label %latch, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch:
; PROLOG-NEXT:    %inc.1 = add nuw i32 %inc, 1
; PROLOG-NEXT:    %cmp1.1 = icmp ult i32 %inc.1, %N
; PROLOG-NEXT:    br i1 %cmp1.1, label %latch.1, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.1:
; PROLOG-NEXT:    %inc.2 = add nuw i32 %inc.1, 1
; PROLOG-NEXT:    %cmp1.2 = icmp ult i32 %inc.2, %N
; PROLOG-NEXT:    br i1 %cmp1.2, label %latch.2, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.2:
; PROLOG-NEXT:    %inc.3 = add nuw i32 %inc.2, 1
; PROLOG-NEXT:    %cmp1.3 = icmp ult i32 %inc.3, %N
; PROLOG-NEXT:    br i1 %cmp1.3, label %latch.3, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.3:
; PROLOG-NEXT:    %inc.4 = add nuw i32 %inc.3, 1
; PROLOG-NEXT:    %cmp1.4 = icmp ult i32 %inc.4, %N
; PROLOG-NEXT:    br i1 %cmp1.4, label %latch.4, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.4:
; PROLOG-NEXT:    %inc.5 = add nuw i32 %inc.4, 1
; PROLOG-NEXT:    %cmp1.5 = icmp ult i32 %inc.5, %N
; PROLOG-NEXT:    br i1 %cmp1.5, label %latch.5, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.5:
; PROLOG-NEXT:    %inc.6 = add nuw i32 %inc.5, 1
; PROLOG-NEXT:    %cmp1.6 = icmp ult i32 %inc.6, %N
; PROLOG-NEXT:    br i1 %cmp1.6, label %latch.6, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.6:
; PROLOG-NEXT:    %inc.7 = add nuw i32 %inc.6, 1
; PROLOG-NEXT:    %cmp1.7 = icmp ult i32 %inc.7, %N
; PROLOG-NEXT:    br i1 %cmp1.7, label %latch.7, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latch.7:
; PROLOG-NEXT:    %cmp.7 = icmp ult i32 %inc.7, %M.shifted
; PROLOG-NEXT:    br i1 %cmp.7, label %header, label %latchExit.unr-lcssa.loopexit
; PROLOG:       latchExit.unr-lcssa.loopexit:
; PROLOG-NEXT:    %i2.ph.ph.ph = phi i32 [ %i4, %header ], [ %inc, %latch ], [ %inc.1, %latch.1 ], [ %inc.2, %latch.2 ], [ %inc.3, %latch.3 ], [ %inc.4, %latch.4 ], [ %inc.5, %latch.5 ], [ %inc.6, %latch.6 ], [ -1, %latch.7 ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa.loopexit1:
; PROLOG-NEXT:    %i2.ph.ph.ph2 = phi i32 [ %i4.prol, %header.prol ]
; PROLOG-NEXT:    br label %latchExit.unr-lcssa
; PROLOG:       latchExit.unr-lcssa:
; PROLOG-NEXT:    %i2.ph.ph = phi i32 [ %i2.ph.ph.ph, %latchExit.unr-lcssa.loopexit ], [ %i2.ph.ph.ph2, %latchExit.unr-lcssa.loopexit1 ]
; PROLOG-NEXT:    br label %latchExit
; PROLOG:       latchExit:
; PROLOG-NEXT:    %i2.ph = phi i32 [ %i2.ph.unr, %header.prol.loopexit ], [ %i2.ph.ph, %latchExit.unr-lcssa ]
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @unique_exit(
; PROLOG-BLOCK-NEXT:  preheader:
; PROLOG-BLOCK-NEXT:    %M.shifted = shl i32 %M, 3
; PROLOG-BLOCK-NEXT:    %umax = call i32 @llvm.umax.i32(i32 %M.shifted, i32 1)
; PROLOG-BLOCK-NEXT:    %0 = freeze i32 %umax
; PROLOG-BLOCK-NEXT:    %1 = add i32 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i32 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    %cmp1.prol = icmp ult i32 1, %N
; PROLOG-BLOCK-NEXT:    br i1 %cmp1.prol, label %latch.prol, label %latchExit.unr-lcssa
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %i4.unr = phi i32 [ 0, %preheader ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %i2.ph.unr = phi i32 [ undef, %preheader ], [ -1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i32 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %latchExit, label %preheader.new
; PROLOG-BLOCK:       preheader.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %i4 = phi i32 [ %i4.unr, %preheader.new ], [ %inc.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %inc = add nuw i32 %i4, 1
; PROLOG-BLOCK-NEXT:    %cmp1 = icmp ult i32 %inc, %N
; PROLOG-BLOCK-NEXT:    br i1 %cmp1, label %latch, label %latchExit.unr-lcssa.loopexit
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %inc.1 = add nuw i32 %inc, 1
; PROLOG-BLOCK-NEXT:    %cmp1.1 = icmp ult i32 %inc.1, %N
; PROLOG-BLOCK-NEXT:    br i1 %cmp1.1, label %latch.1, label %latchExit.unr-lcssa.loopexit
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ult i32 %inc.1, %M.shifted
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %header, label %latchExit.unr-lcssa.loopexit, !llvm.loop !8
; PROLOG-BLOCK:       latchExit.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    %i2.ph.ph.ph = phi i32 [ %i4, %header ], [ %inc, %latch ], [ -1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latchExit.unr-lcssa
; PROLOG-BLOCK:       latchExit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %i2.ph.ph = phi i32 [ 0, %header.prol ], [ %i2.ph.ph.ph, %latchExit.unr-lcssa.loopexit ]
; PROLOG-BLOCK-NEXT:    br label %latchExit
; PROLOG-BLOCK:       latchExit:
; PROLOG-BLOCK-NEXT:    %i2.ph = phi i32 [ %i2.ph.unr, %header.prol.loopexit ], [ %i2.ph.ph, %latchExit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret void
;

preheader:
  %M.shifted = shl nuw i32 %M, 3
  br label %header

header:                                           ; preds = %preheader, %latch
  %i4 = phi i32 [ %inc, %latch ], [ 0, %preheader ]
  %inc = add nuw i32 %i4, 1
  %cmp1 = icmp ult i32 %inc, %N
  br i1 %cmp1, label %latch, label %latchExit

latch:                                            ; preds = %header
  %cmp = icmp ult i32 %inc, %M.shifted
  br i1 %cmp, label %header, label %latchExit

latchExit:                                ; preds = %header, %latch
  %i2.ph = phi i32 [ %i4, %header ], [ -1, %latch ]
  ret void
}


; two exiting and two exit blocks.
; the non-latch exiting block has duplicate edges to the non-latch exit block.
define i64 @test5(i64 %trip, i64 %add, i1 %cond) {
; EPILOG-LABEL: @test5(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latchexit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %sum = phi i64 [ 0, %entry.new ], [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting
; EPILOG:       loop_exiting:
; EPILOG-NEXT:    %ivy = add i64 %iv, %add
; EPILOG-NEXT:    switch i64 %sum, label %loop_latch [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %sum.next = add i64 %sum, %add
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting.1
; EPILOG:       loop_exiting.1:
; EPILOG-NEXT:    %ivy.1 = add i64 %iv_next, %add
; EPILOG-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.2, label %loop_exiting.2
; EPILOG:       loop_exiting.2:
; EPILOG-NEXT:    %ivy.2 = add i64 %iv_next.1, %add
; EPILOG-NEXT:    switch i64 %sum.next.1, label %loop_latch.2 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %sum.next.2 = add i64 %sum.next.1, %add
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.3, label %loop_exiting.3
; EPILOG:       loop_exiting.3:
; EPILOG-NEXT:    %ivy.3 = add i64 %iv_next.2, %add
; EPILOG-NEXT:    switch i64 %sum.next.2, label %loop_latch.3 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %sum.next.3 = add i64 %sum.next.2, %add
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.4, label %loop_exiting.4
; EPILOG:       loop_exiting.4:
; EPILOG-NEXT:    %ivy.4 = add i64 %iv_next.3, %add
; EPILOG-NEXT:    switch i64 %sum.next.3, label %loop_latch.4 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %sum.next.4 = add i64 %sum.next.3, %add
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.5, label %loop_exiting.5
; EPILOG:       loop_exiting.5:
; EPILOG-NEXT:    %ivy.5 = add i64 %iv_next.4, %add
; EPILOG-NEXT:    switch i64 %sum.next.4, label %loop_latch.5 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %sum.next.5 = add i64 %sum.next.4, %add
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.6, label %loop_exiting.6
; EPILOG:       loop_exiting.6:
; EPILOG-NEXT:    %ivy.6 = add i64 %iv_next.5, %add
; EPILOG-NEXT:    switch i64 %sum.next.5, label %loop_latch.6 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %sum.next.6 = add i64 %sum.next.5, %add
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.7, label %loop_exiting.7
; EPILOG:       loop_exiting.7:
; EPILOG-NEXT:    %ivy.7 = add i64 %iv_next.6, %add
; EPILOG-NEXT:    switch i64 %sum.next.6, label %loop_latch.7 [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add nuw nsw i64 %iv_next.6, 1
; EPILOG-NEXT:    %sum.next.7 = add i64 %sum.next.6, %add
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %latchexit.unr-lcssa.loopexit
; EPILOG:       exit1.loopexit:
; EPILOG-NEXT:    %result.ph = phi i64 [ %ivy, %loop_exiting ], [ %ivy, %loop_exiting ], [ %ivy.1, %loop_exiting.1 ], [ %ivy.1, %loop_exiting.1 ], [ %ivy.2, %loop_exiting.2 ], [ %ivy.2, %loop_exiting.2 ], [ %ivy.3, %loop_exiting.3 ], [ %ivy.3, %loop_exiting.3 ], [ %ivy.4, %loop_exiting.4 ], [ %ivy.4, %loop_exiting.4 ], [ %ivy.5, %loop_exiting.5 ], [ %ivy.5, %loop_exiting.5 ], [ %ivy.6, %loop_exiting.6 ], [ %ivy.6, %loop_exiting.6 ], [ %ivy.7, %loop_exiting.7 ], [ %ivy.7, %loop_exiting.7 ]
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1.loopexit2:
; EPILOG-NEXT:    %result.ph3 = phi i64 [ %ivy.epil, %loop_exiting.epil ], [ %ivy.epil, %loop_exiting.epil ]
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    %result = phi i64 [ %result.ph, %exit1.loopexit ], [ %result.ph3, %exit1.loopexit2 ]
; EPILOG-NEXT:    ret i64 %result
; EPILOG:       latchexit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %sum.next.lcssa.ph.ph = phi i64 [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %sum.unr.ph = phi i64 [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %latchexit.unr-lcssa
; EPILOG:       latchexit.unr-lcssa:
; EPILOG-NEXT:    %sum.next.lcssa.ph = phi i64 [ undef, %entry ], [ %sum.next.lcssa.ph.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %latchexit
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %sum.epil = phi i64 [ %sum.unr, %loop_header.epil.preheader ], [ %sum.next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.epil, label %loop_exiting.epil
; EPILOG:       loop_exiting.epil:
; EPILOG-NEXT:    %ivy.epil = add i64 %iv.epil, %add
; EPILOG-NEXT:    switch i64 %sum.epil, label %loop_latch.epil [
; EPILOG-NEXT:    i64 24, label %exit1.loopexit2
; EPILOG-NEXT:    i64 42, label %exit1.loopexit2
; EPILOG-NEXT:    ]
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add nuw nsw i64 %iv.epil, 1
; EPILOG-NEXT:    %sum.next.epil = add i64 %sum.epil, %add
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %latchexit.epilog-lcssa, !llvm.loop !9
; EPILOG:       latchexit.epilog-lcssa:
; EPILOG-NEXT:    %sum.next.lcssa.ph1 = phi i64 [ %sum.next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    br label %latchexit
; EPILOG:       latchexit:
; EPILOG-NEXT:    %sum.next.lcssa = phi i64 [ %sum.next.lcssa.ph, %latchexit.unr-lcssa ], [ %sum.next.lcssa.ph1, %latchexit.epilog-lcssa ]
; EPILOG-NEXT:    ret i64 %sum.next.lcssa
;
; EPILOG-BLOCK-LABEL: @test5(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latchexit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum = phi i64 [ 0, %entry.new ], [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting
; EPILOG-BLOCK:       loop_exiting:
; EPILOG-BLOCK-NEXT:    %ivy = add i64 %iv, %add
; EPILOG-BLOCK-NEXT:    switch i64 %sum, label %loop_latch [
; EPILOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-BLOCK-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-BLOCK-NEXT:    ]
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %sum.next = add i64 %sum, %add
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting.1
; EPILOG-BLOCK:       loop_exiting.1:
; EPILOG-BLOCK-NEXT:    %ivy.1 = add i64 %iv_next, %add
; EPILOG-BLOCK-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; EPILOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; EPILOG-BLOCK-NEXT:    i64 42, label %exit1.loopexit
; EPILOG-BLOCK-NEXT:    ]
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %latchexit.unr-lcssa.loopexit, !llvm.loop !9
; EPILOG-BLOCK:       exit1.loopexit:
; EPILOG-BLOCK-NEXT:    %result.ph = phi i64 [ %ivy, %loop_exiting ], [ %ivy, %loop_exiting ], [ %ivy.1, %loop_exiting.1 ], [ %ivy.1, %loop_exiting.1 ]
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    %result = phi i64 [ %ivy.epil, %loop_exiting.epil ], [ %ivy.epil, %loop_exiting.epil ], [ %result.ph, %exit1.loopexit ]
; EPILOG-BLOCK-NEXT:    ret i64 %result
; EPILOG-BLOCK:       latchexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %sum.next.lcssa.ph.ph = phi i64 [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.unr.ph = phi i64 [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latchexit.unr-lcssa
; EPILOG-BLOCK:       latchexit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %sum.next.lcssa.ph = phi i64 [ undef, %entry ], [ %sum.next.lcssa.ph.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %latchexit
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.epil, label %loop_exiting.epil
; EPILOG-BLOCK:       loop_exiting.epil:
; EPILOG-BLOCK-NEXT:    %ivy.epil = add i64 %iv.unr, %add
; EPILOG-BLOCK-NEXT:    switch i64 %sum.unr, label %loop_latch.epil [
; EPILOG-BLOCK-NEXT:    i64 24, label %exit1
; EPILOG-BLOCK-NEXT:    i64 42, label %exit1
; EPILOG-BLOCK-NEXT:    ]
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    %sum.next.epil = add i64 %sum.unr, %add
; EPILOG-BLOCK-NEXT:    br label %latchexit
; EPILOG-BLOCK:       latchexit:
; EPILOG-BLOCK-NEXT:    %sum.next.lcssa = phi i64 [ %sum.next.lcssa.ph, %latchexit.unr-lcssa ], [ %sum.next.epil, %loop_latch.epil ]
; EPILOG-BLOCK-NEXT:    ret i64 %sum.next.lcssa
;
; PROLOG-LABEL: @test5(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %sum.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %sum.next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.prol, label %loop_exiting.prol
; PROLOG:       loop_exiting.prol:
; PROLOG-NEXT:    %ivy.prol = add i64 %iv.prol, %add
; PROLOG-NEXT:    switch i64 %sum.prol, label %loop_latch.prol [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit1
; PROLOG-NEXT:    i64 42, label %exit1.loopexit1
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add nuw nsw i64 %iv.prol, 1
; PROLOG-NEXT:    %sum.next.prol = add i64 %sum.prol, %add
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !9
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %sum.unr.ph = phi i64 [ %sum.next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %sum.next.lcssa.unr.ph = phi i64 [ %sum.next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.next.lcssa.unr = phi i64 [ undef, %entry ], [ %sum.next.lcssa.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %latchexit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    %sum = phi i64 [ %sum.unr, %entry.new ], [ %sum.next.7, %loop_latch.7 ]
; PROLOG-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting
; PROLOG:       loop_exiting:
; PROLOG-NEXT:    %ivy = add i64 %iv, %add
; PROLOG-NEXT:    switch i64 %sum, label %loop_latch [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; PROLOG-NEXT:    %sum.next = add i64 %sum, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting.1
; PROLOG:       loop_exiting.1:
; PROLOG-NEXT:    %ivy.1 = add i64 %iv_next, %add
; PROLOG-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; PROLOG-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.2, label %loop_exiting.2
; PROLOG:       loop_exiting.2:
; PROLOG-NEXT:    %ivy.2 = add i64 %iv_next.1, %add
; PROLOG-NEXT:    switch i64 %sum.next.1, label %loop_latch.2 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; PROLOG-NEXT:    %sum.next.2 = add i64 %sum.next.1, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.3, label %loop_exiting.3
; PROLOG:       loop_exiting.3:
; PROLOG-NEXT:    %ivy.3 = add i64 %iv_next.2, %add
; PROLOG-NEXT:    switch i64 %sum.next.2, label %loop_latch.3 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; PROLOG-NEXT:    %sum.next.3 = add i64 %sum.next.2, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.4, label %loop_exiting.4
; PROLOG:       loop_exiting.4:
; PROLOG-NEXT:    %ivy.4 = add i64 %iv_next.3, %add
; PROLOG-NEXT:    switch i64 %sum.next.3, label %loop_latch.4 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; PROLOG-NEXT:    %sum.next.4 = add i64 %sum.next.3, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.5, label %loop_exiting.5
; PROLOG:       loop_exiting.5:
; PROLOG-NEXT:    %ivy.5 = add i64 %iv_next.4, %add
; PROLOG-NEXT:    switch i64 %sum.next.4, label %loop_latch.5 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; PROLOG-NEXT:    %sum.next.5 = add i64 %sum.next.4, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.6, label %loop_exiting.6
; PROLOG:       loop_exiting.6:
; PROLOG-NEXT:    %ivy.6 = add i64 %iv_next.5, %add
; PROLOG-NEXT:    switch i64 %sum.next.5, label %loop_latch.6 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; PROLOG-NEXT:    %sum.next.6 = add i64 %sum.next.5, %add
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.7, label %loop_exiting.7
; PROLOG:       loop_exiting.7:
; PROLOG-NEXT:    %ivy.7 = add i64 %iv_next.6, %add
; PROLOG-NEXT:    switch i64 %sum.next.6, label %loop_latch.7 [
; PROLOG-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-NEXT:    ]
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add nuw nsw i64 %iv_next.6, 1
; PROLOG-NEXT:    %sum.next.7 = add i64 %sum.next.6, %add
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %latchexit.unr-lcssa
; PROLOG:       exit1.loopexit:
; PROLOG-NEXT:    %result.ph = phi i64 [ %ivy, %loop_exiting ], [ %ivy, %loop_exiting ], [ %ivy.1, %loop_exiting.1 ], [ %ivy.1, %loop_exiting.1 ], [ %ivy.2, %loop_exiting.2 ], [ %ivy.2, %loop_exiting.2 ], [ %ivy.3, %loop_exiting.3 ], [ %ivy.3, %loop_exiting.3 ], [ %ivy.4, %loop_exiting.4 ], [ %ivy.4, %loop_exiting.4 ], [ %ivy.5, %loop_exiting.5 ], [ %ivy.5, %loop_exiting.5 ], [ %ivy.6, %loop_exiting.6 ], [ %ivy.6, %loop_exiting.6 ], [ %ivy.7, %loop_exiting.7 ], [ %ivy.7, %loop_exiting.7 ]
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1.loopexit1:
; PROLOG-NEXT:    %result.ph2 = phi i64 [ %ivy.prol, %loop_exiting.prol ], [ %ivy.prol, %loop_exiting.prol ]
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    %result = phi i64 [ %result.ph, %exit1.loopexit ], [ %result.ph2, %exit1.loopexit1 ]
; PROLOG-NEXT:    ret i64 %result
; PROLOG:       latchexit.unr-lcssa:
; PROLOG-NEXT:    %sum.next.lcssa.ph = phi i64 [ %sum.next.7, %loop_latch.7 ]
; PROLOG-NEXT:    br label %latchexit
; PROLOG:       latchexit:
; PROLOG-NEXT:    %sum.next.lcssa = phi i64 [ %sum.next.lcssa.unr, %loop_header.prol.loopexit ], [ %sum.next.lcssa.ph, %latchexit.unr-lcssa ]
; PROLOG-NEXT:    ret i64 %sum.next.lcssa
;
; PROLOG-BLOCK-LABEL: @test5(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.prol, label %loop_exiting.prol
; PROLOG-BLOCK:       loop_exiting.prol:
; PROLOG-BLOCK-NEXT:    switch i64 0, label %loop_latch.prol [
; PROLOG-BLOCK-NEXT:    i64 24, label %exit1
; PROLOG-BLOCK-NEXT:    i64 42, label %exit1
; PROLOG-BLOCK-NEXT:    ]
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.unr = phi i64 [ 0, %entry ], [ %add, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.next.lcssa.unr = phi i64 [ undef, %entry ], [ %add, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %latchexit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum = phi i64 [ %sum.unr, %entry.new ], [ %sum.next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %loop_exiting
; PROLOG-BLOCK:       loop_exiting:
; PROLOG-BLOCK-NEXT:    %ivy = add i64 %iv, %add
; PROLOG-BLOCK-NEXT:    switch i64 %sum, label %loop_latch [
; PROLOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-BLOCK-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-BLOCK-NEXT:    ]
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; PROLOG-BLOCK-NEXT:    %sum.next = add i64 %sum, %add
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %loop_exiting.1
; PROLOG-BLOCK:       loop_exiting.1:
; PROLOG-BLOCK-NEXT:    %ivy.1 = add i64 %iv_next, %add
; PROLOG-BLOCK-NEXT:    switch i64 %sum.next, label %loop_latch.1 [
; PROLOG-BLOCK-NEXT:    i64 24, label %exit1.loopexit
; PROLOG-BLOCK-NEXT:    i64 42, label %exit1.loopexit
; PROLOG-BLOCK-NEXT:    ]
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %sum.next.1 = add i64 %sum.next, %add
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %latchexit.unr-lcssa, !llvm.loop !9
; PROLOG-BLOCK:       exit1.loopexit:
; PROLOG-BLOCK-NEXT:    %result.ph = phi i64 [ %ivy, %loop_exiting ], [ %ivy, %loop_exiting ], [ %ivy.1, %loop_exiting.1 ], [ %ivy.1, %loop_exiting.1 ]
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    %result = phi i64 [ %add, %loop_exiting.prol ], [ %add, %loop_exiting.prol ], [ %result.ph, %exit1.loopexit ]
; PROLOG-BLOCK-NEXT:    ret i64 %result
; PROLOG-BLOCK:       latchexit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %sum.next.lcssa.ph = phi i64 [ %sum.next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latchexit
; PROLOG-BLOCK:       latchexit:
; PROLOG-BLOCK-NEXT:    %sum.next.lcssa = phi i64 [ %sum.next.lcssa.unr, %loop_header.prol.loopexit ], [ %sum.next.lcssa.ph, %latchexit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i64 %sum.next.lcssa
;

entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  %sum = phi i64 [ 0, %entry ], [ %sum.next, %loop_latch ]
  br i1 %cond, label %loop_latch, label %loop_exiting

loop_exiting:
  %ivy = add i64 %iv, %add
  switch i64 %sum, label %loop_latch [
  i64 24, label %exit1
  i64 42, label %exit1
  ]

loop_latch:
  %iv_next = add nuw nsw i64 %iv, 1
  %sum.next = add i64 %sum, %add
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %latchexit

exit1:
  %result = phi i64 [ %ivy, %loop_exiting ], [ %ivy, %loop_exiting ]
  ret i64 %result

latchexit:
  ret i64 %sum.next
}

; test when exit blocks have successors.
define i32 @test6(ptr nocapture %a, i64 %n, i1 %cond, i32 %x) {
; EPILOG-LABEL: @test6(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %n
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %latch_exit.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG:       for.exiting_block:
; EPILOG-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-NEXT:    %load = load i32, ptr %arrayidx, align 4
; EPILOG-NEXT:    %add = add nsw i32 %load, %sum.02
; EPILOG-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG:       for.exiting_block.1:
; EPILOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-NEXT:    %load.1 = load i32, ptr %arrayidx.1, align 4
; EPILOG-NEXT:    %add.1 = add nsw i32 %load.1, %add
; EPILOG-NEXT:    %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.2
; EPILOG:       for.exiting_block.2:
; EPILOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.2, label %for.exit2.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; EPILOG-NEXT:    %load.2 = load i32, ptr %arrayidx.2, align 4
; EPILOG-NEXT:    %add.2 = add nsw i32 %load.2, %add.1
; EPILOG-NEXT:    %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.3
; EPILOG:       for.exiting_block.3:
; EPILOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.3, label %for.exit2.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; EPILOG-NEXT:    %load.3 = load i32, ptr %arrayidx.3, align 4
; EPILOG-NEXT:    %add.3 = add nsw i32 %load.3, %add.2
; EPILOG-NEXT:    %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.4
; EPILOG:       for.exiting_block.4:
; EPILOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.4, label %for.exit2.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; EPILOG-NEXT:    %load.4 = load i32, ptr %arrayidx.4, align 4
; EPILOG-NEXT:    %add.4 = add nsw i32 %load.4, %add.3
; EPILOG-NEXT:    %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.5
; EPILOG:       for.exiting_block.5:
; EPILOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.5, label %for.exit2.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; EPILOG-NEXT:    %load.5 = load i32, ptr %arrayidx.5, align 4
; EPILOG-NEXT:    %add.5 = add nsw i32 %load.5, %add.4
; EPILOG-NEXT:    %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.6
; EPILOG:       for.exiting_block.6:
; EPILOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.6, label %for.exit2.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; EPILOG-NEXT:    %load.6 = load i32, ptr %arrayidx.6, align 4
; EPILOG-NEXT:    %add.6 = add nsw i32 %load.6, %add.5
; EPILOG-NEXT:    %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.7
; EPILOG:       for.exiting_block.7:
; EPILOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.7, label %for.exit2.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; EPILOG-NEXT:    %load.7 = load i32, ptr %arrayidx.7, align 4
; EPILOG-NEXT:    %add.7 = add nsw i32 %load.7, %add.6
; EPILOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %latch_exit.unr-lcssa.loopexit, label %header
; EPILOG:       latch_exit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %sum.0.lcssa.ph.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    br label %latch_exit.unr-lcssa
; EPILOG:       latch_exit.unr-lcssa:
; EPILOG-NEXT:    %sum.0.lcssa.ph = phi i32 [ undef, %entry ], [ %sum.0.lcssa.ph.ph, %latch_exit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latch_exit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latch_exit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latch_exit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %latch.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %sum.02.epil = phi i32 [ %add.epil, %latch.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    br i1 false, label %for.exit2.loopexit2, label %for.exiting_block.epil
; EPILOG:       for.exiting_block.epil:
; EPILOG-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT:    br i1 %cmp.epil, label %for.exit2.loopexit2, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.epil
; EPILOG-NEXT:    %load.epil = load i32, ptr %arrayidx.epil, align 4
; EPILOG-NEXT:    %add.epil = add nsw i32 %load.epil, %sum.02.epil
; EPILOG-NEXT:    %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT:    %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latch_exit.epilog-lcssa, !llvm.loop !10
; EPILOG:       latch_exit.epilog-lcssa:
; EPILOG-NEXT:    %sum.0.lcssa.ph1 = phi i32 [ %add.epil, %latch.epil ]
; EPILOG-NEXT:    br label %latch_exit
; EPILOG:       latch_exit:
; EPILOG-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.ph, %latch_exit.unr-lcssa ], [ %sum.0.lcssa.ph1, %latch_exit.epilog-lcssa ]
; EPILOG-NEXT:    ret i32 %sum.0.lcssa
; EPILOG:       for.exit2.loopexit:
; EPILOG-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %latch ], [ 42, %for.exiting_block.1 ], [ %add.1, %latch.1 ], [ 42, %for.exiting_block.2 ], [ %add.2, %latch.2 ], [ 42, %for.exiting_block.3 ], [ %add.3, %latch.3 ], [ 42, %for.exiting_block.4 ], [ %add.4, %latch.4 ], [ 42, %for.exiting_block.5 ], [ %add.5, %latch.5 ], [ 42, %for.exiting_block.6 ], [ %add.6, %latch.6 ], [ 42, %for.exiting_block.7 ]
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2.loopexit2:
; EPILOG-NEXT:    %retval.ph3 = phi i32 [ 42, %for.exiting_block.epil ], [ %sum.02.epil, %header.epil ]
; EPILOG-NEXT:    br label %for.exit2
; EPILOG:       for.exit2:
; EPILOG-NEXT:    %retval = phi i32 [ %retval.ph, %for.exit2.loopexit ], [ %retval.ph3, %for.exit2.loopexit2 ]
; EPILOG-NEXT:    %addx = add i32 %retval, %x
; EPILOG-NEXT:    br i1 %cond, label %exit_true, label %exit_false
; EPILOG:       exit_true:
; EPILOG-NEXT:    ret i32 %retval
; EPILOG:       exit_false:
; EPILOG-NEXT:    ret i32 %addx
;
; EPILOG-BLOCK-LABEL: @test6(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %n
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %latch_exit.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG-BLOCK:       for.exiting_block:
; EPILOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT:    %load = load i32, ptr %arrayidx, align 4
; EPILOG-BLOCK-NEXT:    %add = add nsw i32 %load, %sum.02
; EPILOG-BLOCK-NEXT:    %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK:       for.exiting_block.1:
; EPILOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT:    %load.1 = load i32, ptr %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT:    %add.1 = add nsw i32 %load.1, %add
; EPILOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %latch_exit.unr-lcssa.loopexit, label %header, !llvm.loop !10
; EPILOG-BLOCK:       latch_exit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %sum.0.lcssa.ph.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr.ph = phi i32 [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %latch_exit.unr-lcssa
; EPILOG-BLOCK:       latch_exit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %sum.0.lcssa.ph = phi i32 [ undef, %entry ], [ %sum.0.lcssa.ph.ph, %latch_exit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %latch_exit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %latch_exit.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latch_exit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 false, label %for.exit2, label %for.exiting_block.epil
; EPILOG-BLOCK:       for.exiting_block.epil:
; EPILOG-BLOCK-NEXT:    %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT:    br i1 %cmp.epil, label %for.exit2, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT:    %load.epil = load i32, ptr %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT:    %add.epil = add nsw i32 %load.epil, %sum.02.unr
; EPILOG-BLOCK-NEXT:    br label %latch_exit
; EPILOG-BLOCK:       latch_exit:
; EPILOG-BLOCK-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.ph, %latch_exit.unr-lcssa ], [ %add.epil, %latch.epil ]
; EPILOG-BLOCK-NEXT:    ret i32 %sum.0.lcssa
; EPILOG-BLOCK:       for.exit2.loopexit:
; EPILOG-BLOCK-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %latch ], [ 42, %for.exiting_block.1 ]
; EPILOG-BLOCK-NEXT:    br label %for.exit2
; EPILOG-BLOCK:       for.exit2:
; EPILOG-BLOCK-NEXT:    %retval = phi i32 [ %sum.02.unr, %header.epil ], [ 42, %for.exiting_block.epil ], [ %retval.ph, %for.exit2.loopexit ]
; EPILOG-BLOCK-NEXT:    %addx = add i32 %retval, %x
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %exit_true, label %exit_false
; EPILOG-BLOCK:       exit_true:
; EPILOG-BLOCK-NEXT:    ret i32 %retval
; EPILOG-BLOCK:       exit_false:
; EPILOG-BLOCK-NEXT:    ret i32 %addx
;
; PROLOG-LABEL: @test6(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %n
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %sum.02.prol = phi i32 [ %add.prol, %latch.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit1, label %for.exiting_block.prol
; PROLOG:       for.exiting_block.prol:
; PROLOG-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.prol, label %for.exit2.loopexit1, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %arrayidx.prol = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.prol
; PROLOG-NEXT:    %load.prol = load i32, ptr %arrayidx.prol, align 4
; PROLOG-NEXT:    %add.prol = add nsw i32 %load.prol, %sum.02.prol
; PROLOG-NEXT:    %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT:    %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !10
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %sum.0.lcssa.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    %sum.02.unr.ph = phi i32 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %sum.0.lcssa.unr = phi i32 [ undef, %entry ], [ %sum.0.lcssa.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %latch_exit, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %latch.7 ]
; PROLOG-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG:       for.exiting_block:
; PROLOG-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-NEXT:    %load = load i32, ptr %arrayidx, align 4
; PROLOG-NEXT:    %add = add nsw i32 %load, %sum.02
; PROLOG-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG:       for.exiting_block.1:
; PROLOG-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-NEXT:    %load.1 = load i32, ptr %arrayidx.1, align 4
; PROLOG-NEXT:    %add.1 = add nsw i32 %load.1, %add
; PROLOG-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.2
; PROLOG:       for.exiting_block.2:
; PROLOG-NEXT:    %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.2, label %for.exit2.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %arrayidx.2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.1
; PROLOG-NEXT:    %load.2 = load i32, ptr %arrayidx.2, align 4
; PROLOG-NEXT:    %add.2 = add nsw i32 %load.2, %add.1
; PROLOG-NEXT:    %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.3
; PROLOG:       for.exiting_block.3:
; PROLOG-NEXT:    %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.3, label %for.exit2.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %arrayidx.3 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.2
; PROLOG-NEXT:    %load.3 = load i32, ptr %arrayidx.3, align 4
; PROLOG-NEXT:    %add.3 = add nsw i32 %load.3, %add.2
; PROLOG-NEXT:    %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.4
; PROLOG:       for.exiting_block.4:
; PROLOG-NEXT:    %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.4, label %for.exit2.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %arrayidx.4 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.3
; PROLOG-NEXT:    %load.4 = load i32, ptr %arrayidx.4, align 4
; PROLOG-NEXT:    %add.4 = add nsw i32 %load.4, %add.3
; PROLOG-NEXT:    %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.5
; PROLOG:       for.exiting_block.5:
; PROLOG-NEXT:    %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.5, label %for.exit2.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %arrayidx.5 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.4
; PROLOG-NEXT:    %load.5 = load i32, ptr %arrayidx.5, align 4
; PROLOG-NEXT:    %add.5 = add nsw i32 %load.5, %add.4
; PROLOG-NEXT:    %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.6
; PROLOG:       for.exiting_block.6:
; PROLOG-NEXT:    %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.6, label %for.exit2.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %arrayidx.6 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.5
; PROLOG-NEXT:    %load.6 = load i32, ptr %arrayidx.6, align 4
; PROLOG-NEXT:    %add.6 = add nsw i32 %load.6, %add.5
; PROLOG-NEXT:    %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.7
; PROLOG:       for.exiting_block.7:
; PROLOG-NEXT:    %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT:    br i1 %cmp.7, label %for.exit2.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %arrayidx.7 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next.6
; PROLOG-NEXT:    %load.7 = load i32, ptr %arrayidx.7, align 4
; PROLOG-NEXT:    %add.7 = add nsw i32 %load.7, %add.6
; PROLOG-NEXT:    %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT:    %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT:    br i1 %exitcond.7, label %latch_exit.unr-lcssa, label %header
; PROLOG:       latch_exit.unr-lcssa:
; PROLOG-NEXT:    %sum.0.lcssa.ph = phi i32 [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br label %latch_exit
; PROLOG:       latch_exit:
; PROLOG-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.unr, %header.prol.loopexit ], [ %sum.0.lcssa.ph, %latch_exit.unr-lcssa ]
; PROLOG-NEXT:    ret i32 %sum.0.lcssa
; PROLOG:       for.exit2.loopexit:
; PROLOG-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %latch ], [ 42, %for.exiting_block.1 ], [ %add.1, %latch.1 ], [ 42, %for.exiting_block.2 ], [ %add.2, %latch.2 ], [ 42, %for.exiting_block.3 ], [ %add.3, %latch.3 ], [ 42, %for.exiting_block.4 ], [ %add.4, %latch.4 ], [ 42, %for.exiting_block.5 ], [ %add.5, %latch.5 ], [ 42, %for.exiting_block.6 ], [ %add.6, %latch.6 ], [ 42, %for.exiting_block.7 ]
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2.loopexit1:
; PROLOG-NEXT:    %retval.ph2 = phi i32 [ 42, %for.exiting_block.prol ], [ %sum.02.prol, %header.prol ]
; PROLOG-NEXT:    br label %for.exit2
; PROLOG:       for.exit2:
; PROLOG-NEXT:    %retval = phi i32 [ %retval.ph, %for.exit2.loopexit ], [ %retval.ph2, %for.exit2.loopexit1 ]
; PROLOG-NEXT:    %addx = add i32 %retval, %x
; PROLOG-NEXT:    br i1 %cond, label %exit_true, label %exit_false
; PROLOG:       exit_true:
; PROLOG-NEXT:    ret i32 %retval
; PROLOG:       exit_false:
; PROLOG-NEXT:    ret i32 %addx
;
; PROLOG-BLOCK-LABEL: @test6(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %n
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 false, label %for.exit2, label %for.exiting_block.prol
; PROLOG-BLOCK:       for.exiting_block.prol:
; PROLOG-BLOCK-NEXT:    %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.prol, label %for.exit2, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    %load.prol = load i32, ptr %a, align 4
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %sum.0.lcssa.unr = phi i32 [ undef, %entry ], [ %load.prol, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %sum.02.unr = phi i32 [ 0, %entry ], [ %load.prol, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %latch_exit, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG-BLOCK:       for.exiting_block:
; PROLOG-BLOCK-NEXT:    %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp, label %for.exit2.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT:    %load = load i32, ptr %arrayidx, align 4
; PROLOG-BLOCK-NEXT:    %add = add nsw i32 %load, %sum.02
; PROLOG-BLOCK-NEXT:    %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK:       for.exiting_block.1:
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %for.exit2.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT:    %load.1 = load i32, ptr %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT:    %add.1 = add nsw i32 %load.1, %add
; PROLOG-BLOCK-NEXT:    %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT:    %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT:    br i1 %exitcond.1, label %latch_exit.unr-lcssa, label %header, !llvm.loop !10
; PROLOG-BLOCK:       latch_exit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    %sum.0.lcssa.ph = phi i32 [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br label %latch_exit
; PROLOG-BLOCK:       latch_exit:
; PROLOG-BLOCK-NEXT:    %sum.0.lcssa = phi i32 [ %sum.0.lcssa.unr, %header.prol.loopexit ], [ %sum.0.lcssa.ph, %latch_exit.unr-lcssa ]
; PROLOG-BLOCK-NEXT:    ret i32 %sum.0.lcssa
; PROLOG-BLOCK:       for.exit2.loopexit:
; PROLOG-BLOCK-NEXT:    %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %latch ], [ 42, %for.exiting_block.1 ]
; PROLOG-BLOCK-NEXT:    br label %for.exit2
; PROLOG-BLOCK:       for.exit2:
; PROLOG-BLOCK-NEXT:    %retval = phi i32 [ 0, %header.prol ], [ 42, %for.exiting_block.prol ], [ %retval.ph, %for.exit2.loopexit ]
; PROLOG-BLOCK-NEXT:    %addx = add i32 %retval, %x
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %exit_true, label %exit_false
; PROLOG-BLOCK:       exit_true:
; PROLOG-BLOCK-NEXT:    ret i32 %retval
; PROLOG-BLOCK:       exit_false:
; PROLOG-BLOCK-NEXT:    ret i32 %addx
;

entry:
  br label %header

header:
  %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
  %sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
  br i1 false, label %for.exit2, label %for.exiting_block

for.exiting_block:
  %cmp = icmp eq i64 %n, 42
  br i1 %cmp, label %for.exit2, label %latch

latch:
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %load = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %load, %sum.02
  %indvars.iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %latch_exit, label %header

latch_exit:
  %sum.0.lcssa = phi i32 [ %add, %latch ]
  ret i32 %sum.0.lcssa

for.exit2:
  %retval = phi i32 [ %sum.02, %header ], [ 42, %for.exiting_block ]
  %addx = add i32 %retval, %x
  br i1 %cond, label %exit_true, label %exit_false

exit_true:
  ret i32 %retval

exit_false:
  ret i32 %addx
}

; test when value in exit block does not have VMap.
define i32 @test7(i32 %arg, i32 %arg1, i32 %arg2) {
; EPILOG-LABEL: @test7(
; EPILOG-NEXT:  bb:
; EPILOG-NEXT:    %i = icmp slt i32 undef, 2
; EPILOG-NEXT:    %sext = sext i32 undef to i64
; EPILOG-NEXT:    %shft = ashr exact i32 %arg, 16
; EPILOG-NEXT:    br i1 %i, label %loopexit2, label %preheader
; EPILOG:       preheader:
; EPILOG-NEXT:    %0 = add nsw i64 %sext, -1
; EPILOG-NEXT:    %1 = freeze i64 %0
; EPILOG-NEXT:    %2 = add i64 %1, -1
; EPILOG-NEXT:    %xtraiter = and i64 %1, 7
; EPILOG-NEXT:    %3 = icmp ult i64 %2, 7
; EPILOG-NEXT:    br i1 %3, label %latchexit.unr-lcssa, label %preheader.new
; EPILOG:       preheader.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %1, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %i6 = phi i64 [ 1, %preheader.new ], [ %add.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %preheader.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %add = add nuw nsw i64 %i6, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %add.1 = add nuw nsw i64 %add, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %add.2 = add nuw nsw i64 %add.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %add.3 = add nuw nsw i64 %add.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %add.4 = add nuw nsw i64 %add.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %add.5 = add nuw nsw i64 %add.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %add.6 = add nuw nsw i64 %add.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %add.7 = add nuw nsw i64 %add.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %header, label %latchexit.unr-lcssa.loopexit
; EPILOG:       latchexit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %i6.unr.ph = phi i64 [ %add.7, %latch.7 ]
; EPILOG-NEXT:    br label %latchexit.unr-lcssa
; EPILOG:       latchexit.unr-lcssa:
; EPILOG-NEXT:    %i6.unr = phi i64 [ 1, %preheader ], [ %i6.unr.ph, %latchexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchexit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %i6.epil = phi i64 [ %i6.unr, %header.epil.preheader ], [ %add.epil, %latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    br i1 false, label %loopexit1.loopexit1, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %add.epil = add nuw nsw i64 %i6.epil, 1
; EPILOG-NEXT:    %i9.epil = icmp slt i64 %add.epil, %sext
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %latchexit.epilog-lcssa, !llvm.loop !11
; EPILOG:       latchexit.epilog-lcssa:
; EPILOG-NEXT:    br label %latchexit
; EPILOG:       latchexit:
; EPILOG-NEXT:    unreachable
; EPILOG:       loopexit2:
; EPILOG-NEXT:    ret i32 %shft
; EPILOG:       loopexit1.loopexit:
; EPILOG-NEXT:    %sext3.ph = phi i32 [ %shft, %header ], [ %shft, %latch ], [ %shft, %latch.1 ], [ %shft, %latch.2 ], [ %shft, %latch.3 ], [ %shft, %latch.4 ], [ %shft, %latch.5 ], [ %shft, %latch.6 ]
; EPILOG-NEXT:    br label %loopexit1
; EPILOG:       loopexit1.loopexit1:
; EPILOG-NEXT:    %sext3.ph2 = phi i32 [ %shft, %header.epil ]
; EPILOG-NEXT:    br label %loopexit1
; EPILOG:       loopexit1:
; EPILOG-NEXT:    %sext3 = phi i32 [ %sext3.ph, %loopexit1.loopexit ], [ %sext3.ph2, %loopexit1.loopexit1 ]
; EPILOG-NEXT:    ret i32 %sext3
;
; EPILOG-BLOCK-LABEL: @test7(
; EPILOG-BLOCK-NEXT:  bb:
; EPILOG-BLOCK-NEXT:    %i = icmp slt i32 undef, 2
; EPILOG-BLOCK-NEXT:    %sext = sext i32 undef to i64
; EPILOG-BLOCK-NEXT:    %shft = ashr exact i32 %arg, 16
; EPILOG-BLOCK-NEXT:    br i1 %i, label %loopexit2, label %preheader
; EPILOG-BLOCK:       preheader:
; EPILOG-BLOCK-NEXT:    %0 = add nsw i64 %sext, -1
; EPILOG-BLOCK-NEXT:    %1 = freeze i64 %0
; EPILOG-BLOCK-NEXT:    %2 = add i64 %1, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %1, 1
; EPILOG-BLOCK-NEXT:    %3 = icmp ult i64 %2, 1
; EPILOG-BLOCK-NEXT:    br i1 %3, label %latchexit.unr-lcssa, label %preheader.new
; EPILOG-BLOCK:       preheader.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %1, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %i6 = phi i64 [ 1, %preheader.new ], [ %add.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %preheader.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %add = add nuw nsw i64 %i6, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %add.1 = add nuw nsw i64 %add, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %header, label %latchexit.unr-lcssa.loopexit, !llvm.loop !11
; EPILOG-BLOCK:       latchexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %latchexit.unr-lcssa
; EPILOG-BLOCK:       latchexit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %latchexit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 false, label %loopexit1, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    br label %latchexit
; EPILOG-BLOCK:       latchexit:
; EPILOG-BLOCK-NEXT:    unreachable
; EPILOG-BLOCK:       loopexit2:
; EPILOG-BLOCK-NEXT:    ret i32 %shft
; EPILOG-BLOCK:       loopexit1.loopexit:
; EPILOG-BLOCK-NEXT:    %sext3.ph = phi i32 [ %shft, %header ], [ %shft, %latch ]
; EPILOG-BLOCK-NEXT:    br label %loopexit1
; EPILOG-BLOCK:       loopexit1:
; EPILOG-BLOCK-NEXT:    %sext3 = phi i32 [ %shft, %header.epil ], [ %sext3.ph, %loopexit1.loopexit ]
; EPILOG-BLOCK-NEXT:    ret i32 %sext3
;
; PROLOG-LABEL: @test7(
; PROLOG-NEXT:  bb:
; PROLOG-NEXT:    %i = icmp slt i32 undef, 2
; PROLOG-NEXT:    %sext = sext i32 undef to i64
; PROLOG-NEXT:    %shft = ashr exact i32 %arg, 16
; PROLOG-NEXT:    br i1 %i, label %loopexit2, label %preheader
; PROLOG:       preheader:
; PROLOG-NEXT:    %0 = add nsw i64 %sext, -1
; PROLOG-NEXT:    %1 = freeze i64 %0
; PROLOG-NEXT:    %2 = add i64 %1, -1
; PROLOG-NEXT:    %xtraiter = and i64 %1, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %i6.prol = phi i64 [ 1, %header.prol.preheader ], [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit1, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %add.prol = add nuw nsw i64 %i6.prol, 1
; PROLOG-NEXT:    %i9.prol = icmp slt i64 %add.prol, %sext
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !11
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %i6.unr.ph = phi i64 [ %add.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %i6.unr = phi i64 [ 1, %preheader ], [ %i6.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i64 %2, 7
; PROLOG-NEXT:    br i1 %3, label %latchexit, label %preheader.new
; PROLOG:       preheader.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %i6 = phi i64 [ %i6.unr, %preheader.new ], [ %add.7, %latch.7 ]
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %add = add nuw nsw i64 %i6, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %add.1 = add nuw nsw i64 %add, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %add.2 = add nuw nsw i64 %add.1, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %add.3 = add nuw nsw i64 %add.2, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %add.4 = add nuw nsw i64 %add.3, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %add.5 = add nuw nsw i64 %add.4, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %add.6 = add nuw nsw i64 %add.5, 1
; PROLOG-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %add.7 = add nuw nsw i64 %add.6, 1
; PROLOG-NEXT:    %i9.7 = icmp slt i64 %add.7, %sext
; PROLOG-NEXT:    br i1 %i9.7, label %header, label %latchexit.unr-lcssa
; PROLOG:       latchexit.unr-lcssa:
; PROLOG-NEXT:    br label %latchexit
; PROLOG:       latchexit:
; PROLOG-NEXT:    unreachable
; PROLOG:       loopexit2:
; PROLOG-NEXT:    ret i32 %shft
; PROLOG:       loopexit1.loopexit:
; PROLOG-NEXT:    %sext3.ph = phi i32 [ %shft, %header ], [ %shft, %latch ], [ %shft, %latch.1 ], [ %shft, %latch.2 ], [ %shft, %latch.3 ], [ %shft, %latch.4 ], [ %shft, %latch.5 ], [ %shft, %latch.6 ]
; PROLOG-NEXT:    br label %loopexit1
; PROLOG:       loopexit1.loopexit1:
; PROLOG-NEXT:    %sext3.ph2 = phi i32 [ %shft, %header.prol ]
; PROLOG-NEXT:    br label %loopexit1
; PROLOG:       loopexit1:
; PROLOG-NEXT:    %sext3 = phi i32 [ %sext3.ph, %loopexit1.loopexit ], [ %sext3.ph2, %loopexit1.loopexit1 ]
; PROLOG-NEXT:    ret i32 %sext3
;
; PROLOG-BLOCK-LABEL: @test7(
; PROLOG-BLOCK-NEXT:  bb:
; PROLOG-BLOCK-NEXT:    %i = icmp slt i32 undef, 2
; PROLOG-BLOCK-NEXT:    %sext = sext i32 undef to i64
; PROLOG-BLOCK-NEXT:    %shft = ashr exact i32 %arg, 16
; PROLOG-BLOCK-NEXT:    br i1 %i, label %loopexit2, label %preheader
; PROLOG-BLOCK:       preheader:
; PROLOG-BLOCK-NEXT:    %0 = add nsw i64 %sext, -1
; PROLOG-BLOCK-NEXT:    %1 = freeze i64 %0
; PROLOG-BLOCK-NEXT:    %2 = add i64 %1, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %1, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 false, label %loopexit1, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %i6.unr = phi i64 [ 1, %preheader ], [ 2, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i64 %2, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %latchexit, label %preheader.new
; PROLOG-BLOCK:       preheader.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %i6 = phi i64 [ %i6.unr, %preheader.new ], [ %add.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %add = add nuw nsw i64 %i6, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %loopexit1.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %add.1 = add nuw nsw i64 %add, 1
; PROLOG-BLOCK-NEXT:    %i9.1 = icmp slt i64 %add.1, %sext
; PROLOG-BLOCK-NEXT:    br i1 %i9.1, label %header, label %latchexit.unr-lcssa, !llvm.loop !11
; PROLOG-BLOCK:       latchexit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %latchexit
; PROLOG-BLOCK:       latchexit:
; PROLOG-BLOCK-NEXT:    unreachable
; PROLOG-BLOCK:       loopexit2:
; PROLOG-BLOCK-NEXT:    ret i32 %shft
; PROLOG-BLOCK:       loopexit1.loopexit:
; PROLOG-BLOCK-NEXT:    %sext3.ph = phi i32 [ %shft, %header ], [ %shft, %latch ]
; PROLOG-BLOCK-NEXT:    br label %loopexit1
; PROLOG-BLOCK:       loopexit1:
; PROLOG-BLOCK-NEXT:    %sext3 = phi i32 [ %shft, %header.prol ], [ %sext3.ph, %loopexit1.loopexit ]
; PROLOG-BLOCK-NEXT:    ret i32 %sext3
;
bb:
  %i = icmp slt i32 undef, 2
  %sext = sext i32 undef to i64
  %shft = ashr exact i32 %arg, 16
  br i1 %i, label %loopexit2, label %preheader

preheader:                                              ; preds = %bb2
  br label %header

header:                                              ; preds = %latch, %preheader
  %i6 = phi i64 [ 1, %preheader ], [ %add, %latch ]
  br i1 false, label %loopexit1, label %latch

latch:                                              ; preds = %header
  %add = add nuw nsw i64 %i6, 1
  %i9 = icmp slt i64 %add, %sext
  br i1 %i9, label %header, label %latchexit

latchexit:                                             ; preds = %latch
  unreachable

loopexit2:                                             ; preds = %bb2
  ret i32 %shft

loopexit1:                                             ; preds = %header
  %sext3 = phi i32 [ %shft, %header ]
  ret i32 %sext3
}

; Nested loop and inner loop is unrolled.  The tricky bit here is that
; several blocks in the inner loop fall out of the outer block when we
; use the epilogue block remainder strategy.
define void @test8() {
; EPILOG-LABEL: @test8(
; EPILOG-NEXT:  bb:
; EPILOG-NEXT:    br label %outerloop
; EPILOG:       outerloop.loopexit.loopexit:
; EPILOG-NEXT:    br label %outerloop.loopexit
; EPILOG:       outerloop.loopexit.loopexit1:
; EPILOG-NEXT:    br label %outerloop.loopexit
; EPILOG:       outerloop.loopexit:
; EPILOG-NEXT:    br label %outerloop
; EPILOG:       outerloop:
; EPILOG-NEXT:    %i = phi i64 [ 3, %bb ], [ 0, %outerloop.loopexit ]
; EPILOG-NEXT:    %0 = sub i64 100, %i
; EPILOG-NEXT:    %1 = sub i64 99, %i
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit.unr-lcssa, label %outerloop.new
; EPILOG:       outerloop.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %innerH
; EPILOG:       innerH:
; EPILOG-NEXT:    %i3 = phi i64 [ %i, %outerloop.new ], [ %i4.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %outerloop.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    %i4 = add nuw nsw i64 %i3, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch
; EPILOG:       latch:
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    %i4.1 = add nuw nsw i64 %i4, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.1
; EPILOG:       latch.1:
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    %i4.2 = add nuw nsw i64 %i4.1, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.2
; EPILOG:       latch.2:
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    %i4.3 = add nuw nsw i64 %i4.2, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.3
; EPILOG:       latch.3:
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    %i4.4 = add nuw nsw i64 %i4.3, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.4
; EPILOG:       latch.4:
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    %i4.5 = add nuw nsw i64 %i4.4, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.5
; EPILOG:       latch.5:
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    %i4.6 = add nuw nsw i64 %i4.5, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.6
; EPILOG:       latch.6:
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    %i4.7 = add nuw nsw i64 %i4.6, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.7
; EPILOG:       latch.7:
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %innerH, label %exit.unr-lcssa.loopexit
; EPILOG:       exit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %i3.unr.ph = phi i64 [ %i4.7, %latch.7 ]
; EPILOG-NEXT:    br label %exit.unr-lcssa
; EPILOG:       exit.unr-lcssa:
; EPILOG-NEXT:    %i3.unr = phi i64 [ %i, %outerloop ], [ %i3.unr.ph, %exit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %innerH.epil.preheader, label %exit.loopexit
; EPILOG:       innerH.epil.preheader:
; EPILOG-NEXT:    br label %innerH.epil
; EPILOG:       innerH.epil:
; EPILOG-NEXT:    %i3.epil = phi i64 [ %i4.epil, %latch.epil ], [ %i3.unr, %innerH.epil.preheader ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %innerH.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    %i4.epil = add nuw nsw i64 %i3.epil, 1
; EPILOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit1, label %latch.epil
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %i6.epil = icmp ult i64 %i4.epil, 100
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %innerH.epil, label %exit.epilog-lcssa, !llvm.loop !12
; EPILOG:       exit.epilog-lcssa:
; EPILOG-NEXT:    br label %exit
; EPILOG:       exit.loopexit:
; EPILOG-NEXT:    br label %exit
; EPILOG:       exit:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test8(
; EPILOG-BLOCK-NEXT:  bb:
; EPILOG-BLOCK-NEXT:    br label %outerloop
; EPILOG-BLOCK:       outerloop.loopexit.loopexit:
; EPILOG-BLOCK-NEXT:    br label %outerloop.loopexit
; EPILOG-BLOCK:       outerloop.loopexit:
; EPILOG-BLOCK-NEXT:    br i1 false, label %exit.unr-lcssa.1, label %outerloop.new.1
; EPILOG-BLOCK:       outerloop.new.1:
; EPILOG-BLOCK-NEXT:    br label %innerH.1
; EPILOG-BLOCK:       innerH.1:
; EPILOG-BLOCK-NEXT:    %i3.1 = phi i64 [ 0, %outerloop.new.1 ], [ %i4.1.1, %latch.1.1 ]
; EPILOG-BLOCK-NEXT:    %niter.1 = phi i64 [ 0, %outerloop.new.1 ], [ %niter.next.1.1, %latch.1.1 ]
; EPILOG-BLOCK-NEXT:    %i4.12 = add nuw nsw i64 %i3.1, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit.1, label %latch.14
; EPILOG-BLOCK:       latch.14:
; EPILOG-BLOCK-NEXT:    %niter.next.13 = add nuw nsw i64 %niter.1, 1
; EPILOG-BLOCK-NEXT:    %i4.1.1 = add nuw nsw i64 %i4.12, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit.1, label %latch.1.1
; EPILOG-BLOCK:       latch.1.1:
; EPILOG-BLOCK-NEXT:    %niter.next.1.1 = add i64 %niter.next.13, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1.1 = icmp ne i64 %niter.next.1.1, 100
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1.1, label %innerH.1, label %exit.unr-lcssa.loopexit.1, !llvm.loop !12
; EPILOG-BLOCK:       exit.unr-lcssa.loopexit.1:
; EPILOG-BLOCK-NEXT:    br label %exit.unr-lcssa.1
; EPILOG-BLOCK:       outerloop.loopexit.loopexit.1:
; EPILOG-BLOCK-NEXT:    br label %outerloop.loopexit.1
; EPILOG-BLOCK:       exit.unr-lcssa.1:
; EPILOG-BLOCK-NEXT:    br i1 false, label %innerH.epil.preheader.1, label %exit.loopexit
; EPILOG-BLOCK:       innerH.epil.preheader.1:
; EPILOG-BLOCK-NEXT:    br label %innerH.epil.1
; EPILOG-BLOCK:       innerH.epil.1:
; EPILOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.1, label %latch.epil
; EPILOG-BLOCK:       outerloop.loopexit.1:
; EPILOG-BLOCK-NEXT:    br label %outerloop, !llvm.loop !13
; EPILOG-BLOCK:       outerloop:
; EPILOG-BLOCK-NEXT:    %i = phi i64 [ 3, %bb ], [ 0, %outerloop.loopexit.1 ]
; EPILOG-BLOCK-NEXT:    %0 = sub i64 100, %i
; EPILOG-BLOCK-NEXT:    %1 = sub i64 99, %i
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit.unr-lcssa, label %outerloop.new
; EPILOG-BLOCK:       outerloop.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %innerH
; EPILOG-BLOCK:       innerH:
; EPILOG-BLOCK-NEXT:    %i3 = phi i64 [ %i, %outerloop.new ], [ %i4.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %outerloop.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %i4 = add nuw nsw i64 %i3, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    %i4.1 = add nuw nsw i64 %i4, 1
; EPILOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.1
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %innerH, label %exit.unr-lcssa.loopexit, !llvm.loop !12
; EPILOG-BLOCK:       exit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit.unr-lcssa
; EPILOG-BLOCK:       exit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %innerH.epil.preheader, label %exit.loopexit
; EPILOG-BLOCK:       innerH.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %innerH.epil
; EPILOG-BLOCK:       innerH.epil:
; EPILOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit, label %latch.epil
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit
; EPILOG-BLOCK:       exit.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit
; EPILOG-BLOCK:       exit:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test8(
; PROLOG-NEXT:  bb:
; PROLOG-NEXT:    br label %outerloop
; PROLOG:       outerloop.loopexit.loopexit:
; PROLOG-NEXT:    br label %outerloop.loopexit
; PROLOG:       outerloop.loopexit.loopexit1:
; PROLOG-NEXT:    br label %outerloop.loopexit
; PROLOG:       outerloop.loopexit:
; PROLOG-NEXT:    br label %outerloop
; PROLOG:       outerloop:
; PROLOG-NEXT:    %i = phi i64 [ 3, %bb ], [ 0, %outerloop.loopexit ]
; PROLOG-NEXT:    %0 = sub i64 100, %i
; PROLOG-NEXT:    %1 = sub i64 99, %i
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %innerH.prol.preheader, label %innerH.prol.loopexit
; PROLOG:       innerH.prol.preheader:
; PROLOG-NEXT:    br label %innerH.prol
; PROLOG:       innerH.prol:
; PROLOG-NEXT:    %i3.prol = phi i64 [ %i4.prol, %latch.prol ], [ %i, %innerH.prol.preheader ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %innerH.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    %i4.prol = add nuw nsw i64 %i3.prol, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit1, label %latch.prol
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %i6.prol = icmp ult i64 %i4.prol, 100
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %innerH.prol, label %innerH.prol.loopexit.unr-lcssa, !llvm.loop !12
; PROLOG:       innerH.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %i3.unr.ph = phi i64 [ %i4.prol, %latch.prol ]
; PROLOG-NEXT:    br label %innerH.prol.loopexit
; PROLOG:       innerH.prol.loopexit:
; PROLOG-NEXT:    %i3.unr = phi i64 [ %i, %outerloop ], [ %i3.unr.ph, %innerH.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit.loopexit, label %outerloop.new
; PROLOG:       outerloop.new:
; PROLOG-NEXT:    br label %innerH
; PROLOG:       innerH:
; PROLOG-NEXT:    %i3 = phi i64 [ %i3.unr, %outerloop.new ], [ %i4.7, %latch.7 ]
; PROLOG-NEXT:    %i4 = add nuw nsw i64 %i3, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch
; PROLOG:       latch:
; PROLOG-NEXT:    %i4.1 = add nuw nsw i64 %i4, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.1
; PROLOG:       latch.1:
; PROLOG-NEXT:    %i4.2 = add nuw nsw i64 %i4.1, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.2
; PROLOG:       latch.2:
; PROLOG-NEXT:    %i4.3 = add nuw nsw i64 %i4.2, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.3
; PROLOG:       latch.3:
; PROLOG-NEXT:    %i4.4 = add nuw nsw i64 %i4.3, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.4
; PROLOG:       latch.4:
; PROLOG-NEXT:    %i4.5 = add nuw nsw i64 %i4.4, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.5
; PROLOG:       latch.5:
; PROLOG-NEXT:    %i4.6 = add nuw nsw i64 %i4.5, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.6
; PROLOG:       latch.6:
; PROLOG-NEXT:    %i4.7 = add nuw nsw i64 %i4.6, 1
; PROLOG-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.7
; PROLOG:       latch.7:
; PROLOG-NEXT:    %i6.7 = icmp ult i64 %i4.7, 100
; PROLOG-NEXT:    br i1 %i6.7, label %innerH, label %exit.unr-lcssa
; PROLOG:       exit.unr-lcssa:
; PROLOG-NEXT:    br label %exit
; PROLOG:       exit.loopexit:
; PROLOG-NEXT:    br label %exit
; PROLOG:       exit:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test8(
; PROLOG-BLOCK-NEXT:  bb:
; PROLOG-BLOCK-NEXT:    br label %outerloop
; PROLOG-BLOCK:       outerloop.loopexit.loopexit:
; PROLOG-BLOCK-NEXT:    br label %outerloop.loopexit
; PROLOG-BLOCK:       outerloop.loopexit:
; PROLOG-BLOCK-NEXT:    br i1 false, label %innerH.prol.preheader.1, label %innerH.prol.loopexit.1
; PROLOG-BLOCK:       innerH.prol.preheader.1:
; PROLOG-BLOCK-NEXT:    br label %innerH.prol.1
; PROLOG-BLOCK:       innerH.prol.1:
; PROLOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.1, label %latch.prol.1
; PROLOG-BLOCK:       latch.prol.1:
; PROLOG-BLOCK-NEXT:    br label %innerH.prol.loopexit.1
; PROLOG-BLOCK:       innerH.prol.loopexit.1:
; PROLOG-BLOCK-NEXT:    %i3.unr.1 = phi i64 [ 0, %outerloop.loopexit ], [ 1, %latch.prol.1 ]
; PROLOG-BLOCK-NEXT:    br i1 false, label %exit.loopexit, label %outerloop.new.1
; PROLOG-BLOCK:       outerloop.new.1:
; PROLOG-BLOCK-NEXT:    br label %innerH.1
; PROLOG-BLOCK:       innerH.1:
; PROLOG-BLOCK-NEXT:    %i3.1 = phi i64 [ %i3.unr.1, %outerloop.new.1 ], [ %i4.1.1, %latch.1.1 ]
; PROLOG-BLOCK-NEXT:    %i4.11 = add nuw nsw i64 %i3.1, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit.1, label %latch.12
; PROLOG-BLOCK:       latch.12:
; PROLOG-BLOCK-NEXT:    %i4.1.1 = add nuw nsw i64 %i4.11, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit.1, label %latch.1.1
; PROLOG-BLOCK:       latch.1.1:
; PROLOG-BLOCK-NEXT:    %i6.1.1 = icmp ult i64 %i4.1.1, 100
; PROLOG-BLOCK-NEXT:    br i1 %i6.1.1, label %innerH.1, label %exit.unr-lcssa.loopexit3, !llvm.loop !12
; PROLOG-BLOCK:       outerloop.loopexit.loopexit.1:
; PROLOG-BLOCK-NEXT:    br label %outerloop.loopexit.1
; PROLOG-BLOCK:       outerloop.loopexit.1:
; PROLOG-BLOCK-NEXT:    br label %outerloop, !llvm.loop !13
; PROLOG-BLOCK:       outerloop:
; PROLOG-BLOCK-NEXT:    %i = phi i64 [ 3, %bb ], [ 0, %outerloop.loopexit.1 ]
; PROLOG-BLOCK-NEXT:    %0 = sub i64 100, %i
; PROLOG-BLOCK-NEXT:    %1 = sub i64 99, %i
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %innerH.prol.preheader, label %innerH.prol.loopexit
; PROLOG-BLOCK:       innerH.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %innerH.prol
; PROLOG-BLOCK:       innerH.prol:
; PROLOG-BLOCK-NEXT:    %i4.prol = add nuw nsw i64 %i, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit, label %latch.prol
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    br label %innerH.prol.loopexit
; PROLOG-BLOCK:       innerH.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %i3.unr = phi i64 [ %i, %outerloop ], [ %i4.prol, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit.loopexit, label %outerloop.new
; PROLOG-BLOCK:       outerloop.new:
; PROLOG-BLOCK-NEXT:    br label %innerH
; PROLOG-BLOCK:       innerH:
; PROLOG-BLOCK-NEXT:    %i3 = phi i64 [ %i3.unr, %outerloop.new ], [ %i4.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    %i4 = add nuw nsw i64 %i3, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %i4.1 = add nuw nsw i64 %i4, 1
; PROLOG-BLOCK-NEXT:    br i1 false, label %outerloop.loopexit.loopexit, label %latch.1
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %i6.1 = icmp ult i64 %i4.1, 100
; PROLOG-BLOCK-NEXT:    br i1 %i6.1, label %innerH, label %exit.unr-lcssa.loopexit, !llvm.loop !12
; PROLOG-BLOCK:       exit.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit.unr-lcssa
; PROLOG-BLOCK:       exit.unr-lcssa.loopexit3:
; PROLOG-BLOCK-NEXT:    br label %exit.unr-lcssa
; PROLOG-BLOCK:       exit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit
; PROLOG-BLOCK:       exit.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit
; PROLOG-BLOCK:       exit:
; PROLOG-BLOCK-NEXT:    ret void
;

bb:
  br label %outerloop

outerloop:                                              ; preds = %innerH, %bb
  %i = phi i64 [ 3, %bb ], [ 0, %innerH ]
  br label %innerH

innerH:                                              ; preds = %latch, %outerloop
  %i3 = phi i64 [ %i4, %latch ], [ %i, %outerloop ]
  %i4 = add nuw nsw i64 %i3, 1
  br i1 false, label %outerloop, label %latch

latch:                                              ; preds = %innerH
  %i6 = icmp ult i64 %i4, 100
  br i1 %i6, label %innerH, label %exit

exit:                                              ; preds = %latch
  ret void
}

declare ptr addrspace(1) @foo(i32)
; inner loop prolog unrolled
; a value from outer loop is used in exit block of inner loop.
; Don't create VMap entries for such values (%trip).
define ptr addrspace(1) @test9(ptr nocapture readonly %arg, i32 %n) {
; EPILOG-LABEL: @test9(
; EPILOG-NEXT:  bb:
; EPILOG-NEXT:    %0 = add i32 %n, -1
; EPILOG-NEXT:    br label %outerloopHdr
; EPILOG:       outerloopHdr:
; EPILOG-NEXT:    %trip = add i32 %n, -1
; EPILOG-NEXT:    %outercnd = icmp slt i32 0, %trip
; EPILOG-NEXT:    br i1 %outercnd, label %preheader, label %outerLatch
; EPILOG:       preheader:
; EPILOG-NEXT:    %i4 = zext i32 0 to i64
; EPILOG-NEXT:    %1 = freeze i32 %0
; EPILOG-NEXT:    %2 = add i32 %1, -1
; EPILOG-NEXT:    %xtraiter = and i32 %1, 7
; EPILOG-NEXT:    %3 = icmp ult i32 %2, 7
; EPILOG-NEXT:    br i1 %3, label %outerLatch.loopexit.unr-lcssa, label %preheader.new
; EPILOG:       preheader.new:
; EPILOG-NEXT:    %unroll_iter = sub i32 %1, %xtraiter
; EPILOG-NEXT:    br label %header
; EPILOG:       header:
; EPILOG-NEXT:    %phi = phi i64 [ %i4, %preheader.new ], [ %iv.next.7, %latch.7 ]
; EPILOG-NEXT:    %niter = phi i32 [ 0, %preheader.new ], [ %niter.next.7, %latch.7 ]
; EPILOG-NEXT:    br i1 true, label %latch, label %innerexit.loopexit
; EPILOG:       innerexit.loopexit:
; EPILOG-NEXT:    %trip.lcssa.ph = phi i32 [ %trip, %header ], [ %trip, %latch ], [ %trip, %latch.1 ], [ %trip, %latch.2 ], [ %trip, %latch.3 ], [ %trip, %latch.4 ], [ %trip, %latch.5 ], [ %trip, %latch.6 ]
; EPILOG-NEXT:    br label %innerexit
; EPILOG:       innerexit.loopexit1:
; EPILOG-NEXT:    %trip.lcssa.ph2 = phi i32 [ %trip, %header.epil ]
; EPILOG-NEXT:    br label %innerexit
; EPILOG:       innerexit:
; EPILOG-NEXT:    %trip.lcssa = phi i32 [ %trip.lcssa.ph, %innerexit.loopexit ], [ %trip.lcssa.ph2, %innerexit.loopexit1 ]
; EPILOG-NEXT:    %i9 = call ptr addrspace(1) @foo(i32 %trip.lcssa)
; EPILOG-NEXT:    ret ptr addrspace(1) %i9
; EPILOG:       latch:
; EPILOG-NEXT:    %iv.next = add nuw nsw i64 %phi, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i32 %niter, 1
; EPILOG-NEXT:    br i1 true, label %latch.1, label %innerexit.loopexit
; EPILOG:       latch.1:
; EPILOG-NEXT:    %iv.next.1 = add nuw nsw i64 %iv.next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i32 %niter.next, 1
; EPILOG-NEXT:    br i1 true, label %latch.2, label %innerexit.loopexit
; EPILOG:       latch.2:
; EPILOG-NEXT:    %iv.next.2 = add nuw nsw i64 %iv.next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i32 %niter.next.1, 1
; EPILOG-NEXT:    br i1 true, label %latch.3, label %innerexit.loopexit
; EPILOG:       latch.3:
; EPILOG-NEXT:    %iv.next.3 = add nuw nsw i64 %iv.next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i32 %niter.next.2, 1
; EPILOG-NEXT:    br i1 true, label %latch.4, label %innerexit.loopexit
; EPILOG:       latch.4:
; EPILOG-NEXT:    %iv.next.4 = add nuw nsw i64 %iv.next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i32 %niter.next.3, 1
; EPILOG-NEXT:    br i1 true, label %latch.5, label %innerexit.loopexit
; EPILOG:       latch.5:
; EPILOG-NEXT:    %iv.next.5 = add nuw nsw i64 %iv.next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i32 %niter.next.4, 1
; EPILOG-NEXT:    br i1 true, label %latch.6, label %innerexit.loopexit
; EPILOG:       latch.6:
; EPILOG-NEXT:    %iv.next.6 = add nuw nsw i64 %iv.next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i32 %niter.next.5, 1
; EPILOG-NEXT:    br i1 true, label %latch.7, label %innerexit.loopexit
; EPILOG:       latch.7:
; EPILOG-NEXT:    %iv.next.7 = add nuw nsw i64 %iv.next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i32 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i32 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %header, label %outerLatch.loopexit.unr-lcssa.loopexit
; EPILOG:       outerLatch.loopexit.unr-lcssa.loopexit:
; EPILOG-NEXT:    %phi.unr.ph = phi i64 [ %iv.next.7, %latch.7 ]
; EPILOG-NEXT:    br label %outerLatch.loopexit.unr-lcssa
; EPILOG:       outerLatch.loopexit.unr-lcssa:
; EPILOG-NEXT:    %phi.unr = phi i64 [ %i4, %preheader ], [ %phi.unr.ph, %outerLatch.loopexit.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %outerLatch.loopexit
; EPILOG:       header.epil.preheader:
; EPILOG-NEXT:    br label %header.epil
; EPILOG:       header.epil:
; EPILOG-NEXT:    %phi.epil = phi i64 [ %phi.unr, %header.epil.preheader ], [ %iv.next.epil, %latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i32 [ 0, %header.epil.preheader ], [ %epil.iter.next, %latch.epil ]
; EPILOG-NEXT:    %i7.epil = trunc i64 %phi.epil to i32
; EPILOG-NEXT:    br i1 true, label %latch.epil, label %innerexit.loopexit1
; EPILOG:       latch.epil:
; EPILOG-NEXT:    %i11.epil = add nsw i32 %i7.epil, 1
; EPILOG-NEXT:    %innercnd.epil = icmp slt i32 %i11.epil, %trip
; EPILOG-NEXT:    %iv.next.epil = add nuw nsw i64 %phi.epil, 1
; EPILOG-NEXT:    %epil.iter.next = add i32 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i32 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %header.epil, label %outerLatch.loopexit.epilog-lcssa, !llvm.loop !13
; EPILOG:       outerLatch.loopexit.epilog-lcssa:
; EPILOG-NEXT:    br label %outerLatch.loopexit
; EPILOG:       outerLatch.loopexit:
; EPILOG-NEXT:    br label %outerLatch
; EPILOG:       outerLatch:
; EPILOG-NEXT:    br label %outerloopHdr
;
; EPILOG-BLOCK-LABEL: @test9(
; EPILOG-BLOCK-NEXT:  bb:
; EPILOG-BLOCK-NEXT:    %0 = add i32 %n, -1
; EPILOG-BLOCK-NEXT:    br label %outerloopHdr
; EPILOG-BLOCK:       outerloopHdr:
; EPILOG-BLOCK-NEXT:    %trip = add i32 %n, -1
; EPILOG-BLOCK-NEXT:    %outercnd = icmp slt i32 0, %trip
; EPILOG-BLOCK-NEXT:    br i1 %outercnd, label %preheader, label %outerLatch
; EPILOG-BLOCK:       preheader:
; EPILOG-BLOCK-NEXT:    %1 = freeze i32 %0
; EPILOG-BLOCK-NEXT:    %2 = add i32 %1, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i32 %1, 1
; EPILOG-BLOCK-NEXT:    %3 = icmp ult i32 %2, 1
; EPILOG-BLOCK-NEXT:    br i1 %3, label %outerLatch.loopexit.unr-lcssa, label %preheader.new
; EPILOG-BLOCK:       preheader.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i32 %1, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %header
; EPILOG-BLOCK:       header:
; EPILOG-BLOCK-NEXT:    %phi = phi i64 [ 0, %preheader.new ], [ %iv.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i32 [ 0, %preheader.new ], [ %niter.next.1, %latch.1 ]
; EPILOG-BLOCK-NEXT:    br i1 true, label %latch, label %innerexit.loopexit.loopexit
; EPILOG-BLOCK:       innerexit.loopexit.loopexit:
; EPILOG-BLOCK-NEXT:    %trip.lcssa.ph.ph = phi i32 [ %trip, %latch ], [ %trip, %header ]
; EPILOG-BLOCK-NEXT:    br label %innerexit.loopexit
; EPILOG-BLOCK:       innerexit.loopexit.loopexit6:
; EPILOG-BLOCK-NEXT:    %trip.lcssa.ph.ph7 = phi i32 [ %trip.1, %latch.15 ], [ %trip.1, %header.1 ]
; EPILOG-BLOCK-NEXT:    br label %innerexit.loopexit
; EPILOG-BLOCK:       innerexit.loopexit:
; EPILOG-BLOCK-NEXT:    %trip.lcssa.ph = phi i32 [ %trip.lcssa.ph.ph, %innerexit.loopexit.loopexit ], [ %trip.lcssa.ph.ph7, %innerexit.loopexit.loopexit6 ]
; EPILOG-BLOCK-NEXT:    br label %innerexit
; EPILOG-BLOCK:       innerexit.loopexit1:
; EPILOG-BLOCK-NEXT:    %trip.lcssa.ph2 = phi i32 [ %trip, %header.epil ], [ %trip.1, %header.epil.1 ]
; EPILOG-BLOCK-NEXT:    br label %innerexit
; EPILOG-BLOCK:       innerexit:
; EPILOG-BLOCK-NEXT:    %trip.lcssa = phi i32 [ %trip.lcssa.ph, %innerexit.loopexit ], [ %trip.lcssa.ph2, %innerexit.loopexit1 ]
; EPILOG-BLOCK-NEXT:    %i9 = call ptr addrspace(1) @foo(i32 %trip.lcssa)
; EPILOG-BLOCK-NEXT:    ret ptr addrspace(1) %i9
; EPILOG-BLOCK:       latch:
; EPILOG-BLOCK-NEXT:    %iv.next = add nuw nsw i64 %phi, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i32 %niter, 1
; EPILOG-BLOCK-NEXT:    br i1 true, label %latch.1, label %innerexit.loopexit.loopexit
; EPILOG-BLOCK:       latch.1:
; EPILOG-BLOCK-NEXT:    %iv.next.1 = add nuw nsw i64 %iv.next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i32 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i32 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %header, label %outerLatch.loopexit.unr-lcssa.loopexit, !llvm.loop !14
; EPILOG-BLOCK:       outerLatch.loopexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %outerLatch.loopexit.unr-lcssa
; EPILOG-BLOCK:       outerLatch.loopexit.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.epil.preheader, label %outerLatch.loopexit
; EPILOG-BLOCK:       header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %header.epil
; EPILOG-BLOCK:       header.epil:
; EPILOG-BLOCK-NEXT:    br i1 true, label %latch.epil, label %innerexit.loopexit1
; EPILOG-BLOCK:       latch.epil:
; EPILOG-BLOCK-NEXT:    br label %outerLatch.loopexit
; EPILOG-BLOCK:       outerLatch.loopexit:
; EPILOG-BLOCK-NEXT:    br label %outerLatch
; EPILOG-BLOCK:       outerLatch:
; EPILOG-BLOCK-NEXT:    %trip.1 = add i32 %n, -1
; EPILOG-BLOCK-NEXT:    %outercnd.1 = icmp slt i32 0, %trip.1
; EPILOG-BLOCK-NEXT:    br i1 %outercnd.1, label %preheader.1, label %outerLatch.1
; EPILOG-BLOCK:       preheader.1:
; EPILOG-BLOCK-NEXT:    %4 = freeze i32 %0
; EPILOG-BLOCK-NEXT:    %5 = add i32 %4, -1
; EPILOG-BLOCK-NEXT:    %xtraiter.1 = and i32 %4, 1
; EPILOG-BLOCK-NEXT:    %6 = icmp ult i32 %5, 1
; EPILOG-BLOCK-NEXT:    br i1 %6, label %outerLatch.loopexit.unr-lcssa.1, label %preheader.new.1
; EPILOG-BLOCK:       preheader.new.1:
; EPILOG-BLOCK-NEXT:    %unroll_iter.1 = sub i32 %4, %xtraiter.1
; EPILOG-BLOCK-NEXT:    br label %header.1
; EPILOG-BLOCK:       header.1:
; EPILOG-BLOCK-NEXT:    %phi.1 = phi i64 [ 0, %preheader.new.1 ], [ %iv.next.1.1, %latch.1.1 ]
; EPILOG-BLOCK-NEXT:    %niter.1 = phi i32 [ 0, %preheader.new.1 ], [ %niter.next.1.1, %latch.1.1 ]
; EPILOG-BLOCK-NEXT:    br i1 true, label %latch.15, label %innerexit.loopexit.loopexit6
; EPILOG-BLOCK:       latch.15:
; EPILOG-BLOCK-NEXT:    %iv.next.13 = add nuw nsw i64 %phi.1, 1
; EPILOG-BLOCK-NEXT:    %niter.next.14 = add nuw nsw i32 %niter.1, 1
; EPILOG-BLOCK-NEXT:    br i1 true, label %latch.1.1, label %innerexit.loopexit.loopexit6
; EPILOG-BLOCK:       latch.1.1:
; EPILOG-BLOCK-NEXT:    %iv.next.1.1 = add nuw nsw i64 %iv.next.13, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1.1 = add i32 %niter.next.14, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1.1 = icmp ne i32 %niter.next.1.1, %unroll_iter.1
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1.1, label %header.1, label %outerLatch.loopexit.unr-lcssa.loopexit.1, !llvm.loop !14
; EPILOG-BLOCK:       outerLatch.loopexit.unr-lcssa.loopexit.1:
; EPILOG-BLOCK-NEXT:    br label %outerLatch.loopexit.unr-lcssa.1
; EPILOG-BLOCK:       outerLatch.loopexit.unr-lcssa.1:
; EPILOG-BLOCK-NEXT:    %lcmp.mod.1 = icmp ne i32 %xtraiter.1, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod.1, label %header.epil.preheader.1, label %outerLatch.loopexit.1
; EPILOG-BLOCK:       header.epil.preheader.1:
; EPILOG-BLOCK-NEXT:    br label %header.epil.1
; EPILOG-BLOCK:       header.epil.1:
; EPILOG-BLOCK-NEXT:    br i1 true, label %latch.epil.1, label %innerexit.loopexit1
; EPILOG-BLOCK:       latch.epil.1:
; EPILOG-BLOCK-NEXT:    br label %outerLatch.loopexit.1
; EPILOG-BLOCK:       outerLatch.loopexit.1:
; EPILOG-BLOCK-NEXT:    br label %outerLatch.1
; EPILOG-BLOCK:       outerLatch.1:
; EPILOG-BLOCK-NEXT:    br label %outerloopHdr, !llvm.loop !15
;
; PROLOG-LABEL: @test9(
; PROLOG-NEXT:  bb:
; PROLOG-NEXT:    %0 = add i32 %n, -1
; PROLOG-NEXT:    br label %outerloopHdr
; PROLOG:       outerloopHdr:
; PROLOG-NEXT:    %trip = add i32 %n, -1
; PROLOG-NEXT:    %outercnd = icmp slt i32 0, %trip
; PROLOG-NEXT:    br i1 %outercnd, label %preheader, label %outerLatch
; PROLOG:       preheader:
; PROLOG-NEXT:    %i4 = zext i32 0 to i64
; PROLOG-NEXT:    %1 = freeze i32 %0
; PROLOG-NEXT:    %2 = add i32 %1, -1
; PROLOG-NEXT:    %xtraiter = and i32 %1, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG:       header.prol.preheader:
; PROLOG-NEXT:    br label %header.prol
; PROLOG:       header.prol:
; PROLOG-NEXT:    %phi.prol = phi i64 [ %i4, %header.prol.preheader ], [ %iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i32 [ 0, %header.prol.preheader ], [ %prol.iter.next, %latch.prol ]
; PROLOG-NEXT:    %i7.prol = trunc i64 %phi.prol to i32
; PROLOG-NEXT:    br i1 true, label %latch.prol, label %innerexit.loopexit1
; PROLOG:       latch.prol:
; PROLOG-NEXT:    %i11.prol = add nsw i32 %i7.prol, 1
; PROLOG-NEXT:    %innercnd.prol = icmp slt i32 %i11.prol, %trip
; PROLOG-NEXT:    %iv.next.prol = add nuw nsw i64 %phi.prol, 1
; PROLOG-NEXT:    %prol.iter.next = add i32 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i32 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !13
; PROLOG:       header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %phi.unr.ph = phi i64 [ %iv.next.prol, %latch.prol ]
; PROLOG-NEXT:    br label %header.prol.loopexit
; PROLOG:       header.prol.loopexit:
; PROLOG-NEXT:    %phi.unr = phi i64 [ %i4, %preheader ], [ %phi.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %3 = icmp ult i32 %2, 7
; PROLOG-NEXT:    br i1 %3, label %outerLatch.loopexit, label %preheader.new
; PROLOG:       preheader.new:
; PROLOG-NEXT:    br label %header
; PROLOG:       header:
; PROLOG-NEXT:    %phi = phi i64 [ %phi.unr, %preheader.new ], [ %iv.next.7, %latch.7 ]
; PROLOG-NEXT:    br i1 true, label %latch, label %innerexit.loopexit
; PROLOG:       innerexit.loopexit:
; PROLOG-NEXT:    %trip.lcssa.ph = phi i32 [ %trip, %header ], [ %trip, %latch ], [ %trip, %latch.1 ], [ %trip, %latch.2 ], [ %trip, %latch.3 ], [ %trip, %latch.4 ], [ %trip, %latch.5 ], [ %trip, %latch.6 ]
; PROLOG-NEXT:    br label %innerexit
; PROLOG:       innerexit.loopexit1:
; PROLOG-NEXT:    %trip.lcssa.ph2 = phi i32 [ %trip, %header.prol ]
; PROLOG-NEXT:    br label %innerexit
; PROLOG:       innerexit:
; PROLOG-NEXT:    %trip.lcssa = phi i32 [ %trip.lcssa.ph, %innerexit.loopexit ], [ %trip.lcssa.ph2, %innerexit.loopexit1 ]
; PROLOG-NEXT:    %i9 = call ptr addrspace(1) @foo(i32 %trip.lcssa)
; PROLOG-NEXT:    ret ptr addrspace(1) %i9
; PROLOG:       latch:
; PROLOG-NEXT:    %iv.next = add nuw nsw i64 %phi, 1
; PROLOG-NEXT:    br i1 true, label %latch.1, label %innerexit.loopexit
; PROLOG:       latch.1:
; PROLOG-NEXT:    %iv.next.1 = add nuw nsw i64 %iv.next, 1
; PROLOG-NEXT:    br i1 true, label %latch.2, label %innerexit.loopexit
; PROLOG:       latch.2:
; PROLOG-NEXT:    %iv.next.2 = add nuw nsw i64 %iv.next.1, 1
; PROLOG-NEXT:    br i1 true, label %latch.3, label %innerexit.loopexit
; PROLOG:       latch.3:
; PROLOG-NEXT:    %iv.next.3 = add nuw nsw i64 %iv.next.2, 1
; PROLOG-NEXT:    br i1 true, label %latch.4, label %innerexit.loopexit
; PROLOG:       latch.4:
; PROLOG-NEXT:    %iv.next.4 = add nuw nsw i64 %iv.next.3, 1
; PROLOG-NEXT:    br i1 true, label %latch.5, label %innerexit.loopexit
; PROLOG:       latch.5:
; PROLOG-NEXT:    %iv.next.5 = add nuw nsw i64 %iv.next.4, 1
; PROLOG-NEXT:    br i1 true, label %latch.6, label %innerexit.loopexit
; PROLOG:       latch.6:
; PROLOG-NEXT:    %iv.next.6 = add nuw nsw i64 %iv.next.5, 1
; PROLOG-NEXT:    %i7.7 = trunc i64 %iv.next.6 to i32
; PROLOG-NEXT:    br i1 true, label %latch.7, label %innerexit.loopexit
; PROLOG:       latch.7:
; PROLOG-NEXT:    %i11.7 = add nsw i32 %i7.7, 1
; PROLOG-NEXT:    %innercnd.7 = icmp slt i32 %i11.7, %trip
; PROLOG-NEXT:    %iv.next.7 = add nuw nsw i64 %iv.next.6, 1
; PROLOG-NEXT:    br i1 %innercnd.7, label %header, label %outerLatch.loopexit.unr-lcssa
; PROLOG:       outerLatch.loopexit.unr-lcssa:
; PROLOG-NEXT:    br label %outerLatch.loopexit
; PROLOG:       outerLatch.loopexit:
; PROLOG-NEXT:    br label %outerLatch
; PROLOG:       outerLatch:
; PROLOG-NEXT:    br label %outerloopHdr
;
; PROLOG-BLOCK-LABEL: @test9(
; PROLOG-BLOCK-NEXT:  bb:
; PROLOG-BLOCK-NEXT:    %0 = add i32 %n, -1
; PROLOG-BLOCK-NEXT:    br label %outerloopHdr
; PROLOG-BLOCK:       outerloopHdr:
; PROLOG-BLOCK-NEXT:    %trip = add i32 %n, -1
; PROLOG-BLOCK-NEXT:    %outercnd = icmp slt i32 0, %trip
; PROLOG-BLOCK-NEXT:    br i1 %outercnd, label %preheader, label %outerLatch
; PROLOG-BLOCK:       preheader:
; PROLOG-BLOCK-NEXT:    %1 = freeze i32 %0
; PROLOG-BLOCK-NEXT:    %2 = add i32 %1, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i32 %1, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i32 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %header.prol
; PROLOG-BLOCK:       header.prol:
; PROLOG-BLOCK-NEXT:    br i1 true, label %latch.prol, label %innerexit.loopexit1
; PROLOG-BLOCK:       latch.prol:
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit
; PROLOG-BLOCK:       header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %phi.unr = phi i64 [ 0, %preheader ], [ 1, %latch.prol ]
; PROLOG-BLOCK-NEXT:    %3 = icmp ult i32 %2, 1
; PROLOG-BLOCK-NEXT:    br i1 %3, label %outerLatch.loopexit, label %preheader.new
; PROLOG-BLOCK:       preheader.new:
; PROLOG-BLOCK-NEXT:    br label %header
; PROLOG-BLOCK:       header:
; PROLOG-BLOCK-NEXT:    %phi = phi i64 [ %phi.unr, %preheader.new ], [ %iv.next.1, %latch.1 ]
; PROLOG-BLOCK-NEXT:    br i1 true, label %latch, label %innerexit.loopexit.loopexit
; PROLOG-BLOCK:       innerexit.loopexit.loopexit:
; PROLOG-BLOCK-NEXT:    %trip.lcssa.ph.ph = phi i32 [ %trip, %latch ], [ %trip, %header ]
; PROLOG-BLOCK-NEXT:    br label %innerexit.loopexit
; PROLOG-BLOCK:       innerexit.loopexit.loopexit5:
; PROLOG-BLOCK-NEXT:    %trip.lcssa.ph.ph6 = phi i32 [ %trip.1, %latch.14 ], [ %trip.1, %header.1 ]
; PROLOG-BLOCK-NEXT:    br label %innerexit.loopexit
; PROLOG-BLOCK:       innerexit.loopexit:
; PROLOG-BLOCK-NEXT:    %trip.lcssa.ph = phi i32 [ %trip.lcssa.ph.ph, %innerexit.loopexit.loopexit ], [ %trip.lcssa.ph.ph6, %innerexit.loopexit.loopexit5 ]
; PROLOG-BLOCK-NEXT:    br label %innerexit
; PROLOG-BLOCK:       innerexit.loopexit1:
; PROLOG-BLOCK-NEXT:    %trip.lcssa.ph2 = phi i32 [ %trip, %header.prol ], [ %trip.1, %header.prol.1 ]
; PROLOG-BLOCK-NEXT:    br label %innerexit
; PROLOG-BLOCK:       innerexit:
; PROLOG-BLOCK-NEXT:    %trip.lcssa = phi i32 [ %trip.lcssa.ph, %innerexit.loopexit ], [ %trip.lcssa.ph2, %innerexit.loopexit1 ]
; PROLOG-BLOCK-NEXT:    %i9 = call ptr addrspace(1) @foo(i32 %trip.lcssa)
; PROLOG-BLOCK-NEXT:    ret ptr addrspace(1) %i9
; PROLOG-BLOCK:       latch:
; PROLOG-BLOCK-NEXT:    %iv.next = add nuw nsw i64 %phi, 1
; PROLOG-BLOCK-NEXT:    %i7.1 = trunc i64 %iv.next to i32
; PROLOG-BLOCK-NEXT:    br i1 true, label %latch.1, label %innerexit.loopexit.loopexit
; PROLOG-BLOCK:       latch.1:
; PROLOG-BLOCK-NEXT:    %i11.1 = add nsw i32 %i7.1, 1
; PROLOG-BLOCK-NEXT:    %innercnd.1 = icmp slt i32 %i11.1, %trip
; PROLOG-BLOCK-NEXT:    %iv.next.1 = add nuw nsw i64 %iv.next, 1
; PROLOG-BLOCK-NEXT:    br i1 %innercnd.1, label %header, label %outerLatch.loopexit.unr-lcssa, !llvm.loop !14
; PROLOG-BLOCK:       outerLatch.loopexit.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %outerLatch.loopexit
; PROLOG-BLOCK:       outerLatch.loopexit:
; PROLOG-BLOCK-NEXT:    br label %outerLatch
; PROLOG-BLOCK:       outerLatch:
; PROLOG-BLOCK-NEXT:    %trip.1 = add i32 %n, -1
; PROLOG-BLOCK-NEXT:    %outercnd.1 = icmp slt i32 0, %trip.1
; PROLOG-BLOCK-NEXT:    br i1 %outercnd.1, label %preheader.1, label %outerLatch.1
; PROLOG-BLOCK:       preheader.1:
; PROLOG-BLOCK-NEXT:    %4 = freeze i32 %0
; PROLOG-BLOCK-NEXT:    %5 = add i32 %4, -1
; PROLOG-BLOCK-NEXT:    %xtraiter.1 = and i32 %4, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod.1 = icmp ne i32 %xtraiter.1, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod.1, label %header.prol.preheader.1, label %header.prol.loopexit.1
; PROLOG-BLOCK:       header.prol.preheader.1:
; PROLOG-BLOCK-NEXT:    br label %header.prol.1
; PROLOG-BLOCK:       header.prol.1:
; PROLOG-BLOCK-NEXT:    br i1 true, label %latch.prol.1, label %innerexit.loopexit1
; PROLOG-BLOCK:       latch.prol.1:
; PROLOG-BLOCK-NEXT:    br label %header.prol.loopexit.1
; PROLOG-BLOCK:       header.prol.loopexit.1:
; PROLOG-BLOCK-NEXT:    %phi.unr.1 = phi i64 [ 0, %preheader.1 ], [ 1, %latch.prol.1 ]
; PROLOG-BLOCK-NEXT:    %6 = icmp ult i32 %5, 1
; PROLOG-BLOCK-NEXT:    br i1 %6, label %outerLatch.loopexit.1, label %preheader.new.1
; PROLOG-BLOCK:       preheader.new.1:
; PROLOG-BLOCK-NEXT:    br label %header.1
; PROLOG-BLOCK:       header.1:
; PROLOG-BLOCK-NEXT:    %phi.1 = phi i64 [ %phi.unr.1, %preheader.new.1 ], [ %iv.next.1.1, %latch.1.1 ]
; PROLOG-BLOCK-NEXT:    br i1 true, label %latch.14, label %innerexit.loopexit.loopexit5
; PROLOG-BLOCK:       latch.14:
; PROLOG-BLOCK-NEXT:    %iv.next.13 = add nuw nsw i64 %phi.1, 1
; PROLOG-BLOCK-NEXT:    %i7.1.1 = trunc i64 %iv.next.13 to i32
; PROLOG-BLOCK-NEXT:    br i1 true, label %latch.1.1, label %innerexit.loopexit.loopexit5
; PROLOG-BLOCK:       latch.1.1:
; PROLOG-BLOCK-NEXT:    %i11.1.1 = add nsw i32 %i7.1.1, 1
; PROLOG-BLOCK-NEXT:    %innercnd.1.1 = icmp slt i32 %i11.1.1, %trip.1
; PROLOG-BLOCK-NEXT:    %iv.next.1.1 = add nuw nsw i64 %iv.next.13, 1
; PROLOG-BLOCK-NEXT:    br i1 %innercnd.1.1, label %header.1, label %outerLatch.loopexit.unr-lcssa.1, !llvm.loop !14
; PROLOG-BLOCK:       outerLatch.loopexit.unr-lcssa.1:
; PROLOG-BLOCK-NEXT:    br label %outerLatch.loopexit.1
; PROLOG-BLOCK:       outerLatch.loopexit.1:
; PROLOG-BLOCK-NEXT:    br label %outerLatch.1
; PROLOG-BLOCK:       outerLatch.1:
; PROLOG-BLOCK-NEXT:    br label %outerloopHdr, !llvm.loop !15
;
bb:
  br label %outerloopHdr

outerloopHdr:                                              ; preds = %outerLatch, %bb
  %trip = add i32 %n, -1
  %outercnd = icmp slt i32 0, %trip
  br i1 %outercnd, label %preheader, label %outerLatch

preheader:                                              ; preds = %outerloopHdr
  %i4 = zext i32 0 to i64
  br label %header

header:                                              ; preds = %latch, %preheader
  %phi = phi i64 [ %i4, %preheader ], [ %iv.next, %latch ]
  %i7 = trunc i64 %phi to i32
  br i1 true, label %latch, label %innerexit

innerexit:                                              ; preds = %header
  %i9 = call ptr addrspace(1) @foo(i32 %trip)
  ret ptr addrspace(1) %i9

latch:                                             ; preds = %header
  %i11 = add nsw i32 %i7, 1
  %innercnd = icmp slt i32 %i11, %trip
  %iv.next = add nuw nsw i64 %phi, 1
  br i1 %innercnd, label %header, label %outerLatch

outerLatch:                                             ; preds = %latch, %outerloopHdr
  br label %outerloopHdr
}

declare void @bar()

; This is a case where we should be able to eliminate N-1 copies
; of the early exit test in the main loop when runtime unrolling
; by N.
define void @test10(i64 %trip, i64 %trip2) {
; EPILOG-LABEL: @test10(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit2.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-NEXT:    br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.2, label %loop_latch.2, label %exit1.loopexit
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.3, label %loop_latch.3, label %exit1.loopexit
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.4, label %loop_latch.4, label %exit1.loopexit
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.5, label %loop_latch.5, label %exit1.loopexit
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.6, label %loop_latch.6, label %exit1.loopexit
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.7, label %loop_latch.7, label %exit1.loopexit
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit2.unr-lcssa.loopexit
; EPILOG:       exit1.loopexit:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1.loopexit1:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
; EPILOG:       exit2.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit2.unr-lcssa
; EPILOG:       exit2.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.epil = icmp ne i64 %iv.epil, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.epil, label %loop_latch.epil, label %exit1.loopexit1
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.epilog-lcssa, !llvm.loop !14
; EPILOG:       exit2.epilog-lcssa:
; EPILOG-NEXT:    br label %exit2
; EPILOG:       exit2:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test10(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit2.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit2.unr-lcssa.loopexit, !llvm.loop !16
; EPILOG-BLOCK:       exit1.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
; EPILOG-BLOCK:       exit2.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %exit2.unr-lcssa
; EPILOG-BLOCK:       exit2.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early.epil = icmp ne i64 %iv.unr, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early.epil, label %loop_latch.epil, label %exit1
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit2
; EPILOG-BLOCK:       exit2:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test10(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.prol = icmp ne i64 %iv.prol, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.prol, label %loop_latch.prol, label %exit1.loopexit1
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !14
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit2, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-NEXT:    br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.2, label %loop_latch.2, label %exit1.loopexit
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.3, label %loop_latch.3, label %exit1.loopexit
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.4, label %loop_latch.4, label %exit1.loopexit
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.5, label %loop_latch.5, label %exit1.loopexit
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.6, label %loop_latch.6, label %exit1.loopexit
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.7, label %loop_latch.7, label %exit1.loopexit
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit2.unr-lcssa
; PROLOG:       exit1.loopexit:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1.loopexit1:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
; PROLOG:       exit2.unr-lcssa:
; PROLOG-NEXT:    br label %exit2
; PROLOG:       exit2:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test10(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early.prol = icmp ne i64 0, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early.prol, label %loop_latch.prol, label %exit1
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit2, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit2.unr-lcssa, !llvm.loop !16
; PROLOG-BLOCK:       exit1.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
; PROLOG-BLOCK:       exit2.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit2
; PROLOG-BLOCK:       exit2:
; PROLOG-BLOCK-NEXT:    ret void
;
entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  call void @bar()
  %cmp_early = icmp ne i64 %iv, %trip2
  br i1 %cmp_early, label %loop_latch, label %exit1

loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit2

exit1:
  ret void

exit2:
  ret void
}

; With a loop invariant, we can eliminate the last N-1
; copies of the exit test in the unrolled main loop body.
define void @test11(i64 %trip, i1 %cond) {
; EPILOG-LABEL: @test11(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit2.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch, label %exit1.loopexit
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.2, label %exit1.loopexit
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.3, label %exit1.loopexit
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.4, label %exit1.loopexit
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.5, label %exit1.loopexit
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.6, label %exit1.loopexit
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.7, label %exit1.loopexit
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit2.unr-lcssa.loopexit
; EPILOG:       exit1.loopexit:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1.loopexit1:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
; EPILOG:       exit2.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit2.unr-lcssa
; EPILOG:       exit2.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.epil, label %exit1.loopexit1
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.epilog-lcssa, !llvm.loop !15
; EPILOG:       exit2.epilog-lcssa:
; EPILOG-NEXT:    br label %exit2
; EPILOG:       exit2:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test11(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit2.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %exit1.loopexit
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit2.unr-lcssa.loopexit, !llvm.loop !17
; EPILOG-BLOCK:       exit1.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
; EPILOG-BLOCK:       exit2.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit2.unr-lcssa
; EPILOG-BLOCK:       exit2.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.epil, label %exit1
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit2
; EPILOG-BLOCK:       exit2:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test11(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.prol, label %exit1.loopexit1
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !15
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit2, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch, label %exit1.loopexit
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.2, label %exit1.loopexit
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.3, label %exit1.loopexit
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.4, label %exit1.loopexit
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.5, label %exit1.loopexit
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.6, label %exit1.loopexit
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.7, label %exit1.loopexit
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit2.unr-lcssa
; PROLOG:       exit1.loopexit:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1.loopexit1:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
; PROLOG:       exit2.unr-lcssa:
; PROLOG-NEXT:    br label %exit2
; PROLOG:       exit2:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test11(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.prol, label %exit1
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit2, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %exit1.loopexit
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit2.unr-lcssa, !llvm.loop !17
; PROLOG-BLOCK:       exit1.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
; PROLOG-BLOCK:       exit2.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit2
; PROLOG-BLOCK:       exit2:
; PROLOG-BLOCK-NEXT:    ret void
;
entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  call void @bar()
  br i1 %cond, label %loop_latch, label %exit1

loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit2

exit1:
  ret void

exit2:
  ret void
}

; Combine a computeable and invariant test to make sure
; the interaction of both doesn't do anything weird
define void @test12(i64 %trip, i64 %trip2, i1 %cond) {
; EPILOG-LABEL: @test12(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit1.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.1:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.2:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.3:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.3, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.4:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.4, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.5:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.5, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.6:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.6, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.7:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.7, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
; EPILOG:       exit1.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit1.unr-lcssa
; EPILOG:       exit1.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.epil = icmp ne i64 %iv.epil, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG:       loop_exiting_bb2.epil:
; EPILOG-NEXT:    br i1 %cond, label %loop_latch.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit1.epilog-lcssa.loopexit1, !llvm.loop !16
; EPILOG:       exit1.epilog-lcssa.loopexit:
; EPILOG-NEXT:    br label %exit1.epilog-lcssa
; EPILOG:       exit1.epilog-lcssa.loopexit1:
; EPILOG-NEXT:    br label %exit1.epilog-lcssa
; EPILOG:       exit1.epilog-lcssa:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test12(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit1.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !18
; EPILOG-BLOCK:       exit1.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %exit1.unr-lcssa
; EPILOG-BLOCK:       exit1.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early.epil = icmp ne i64 %iv.unr, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK:       loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit1.epilog-lcssa
; EPILOG-BLOCK:       exit1.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1.epilog-lcssa
; EPILOG-BLOCK:       exit1.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test12(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.prol = icmp ne i64 %iv.prol, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG:       loop_exiting_bb2.prol:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !16
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit1, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.1:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.2:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.3:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.3, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.4:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.4, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.5:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.5, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.6:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.6, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.7:
; PROLOG-NEXT:    br i1 %cond, label %loop_latch.7, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
; PROLOG:       exit1.unr-lcssa.loopexit:
; PROLOG-NEXT:    br label %exit1.unr-lcssa
; PROLOG:       exit1.unr-lcssa.loopexit1:
; PROLOG-NEXT:    br label %exit1.unr-lcssa
; PROLOG:       exit1.unr-lcssa:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test12(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early.prol = icmp ne i64 0, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK:       loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit1, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !18
; PROLOG-BLOCK:       exit1.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1.unr-lcssa
; PROLOG-BLOCK:       exit1.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
;
entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  call void @bar()
  %cmp_early = icmp ne i64 %iv, %trip2
  br i1 %cmp_early, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
  br i1 %cond, label %loop_latch, label %exit1

loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit1

exit1:
  ret void
}

declare i1 @unknown_cond()

; Mix of computable and uncompatable exits
define void @test13(i64 %trip, i64 %trip2) {
; EPILOG-LABEL: @test13(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit1.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2:
; EPILOG-NEXT:    %unknown = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.1:
; EPILOG-NEXT:    %unknown.1 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.2:
; EPILOG-NEXT:    %unknown.2 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.2, label %loop_latch.2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.3:
; EPILOG-NEXT:    %unknown.3 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.3, label %loop_latch.3, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.4:
; EPILOG-NEXT:    %unknown.4 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.4, label %loop_latch.4, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.5:
; EPILOG-NEXT:    %unknown.5 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.5, label %loop_latch.5, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.6:
; EPILOG-NEXT:    %unknown.6 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.6, label %loop_latch.6, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.7:
; EPILOG-NEXT:    %unknown.7 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.7, label %loop_latch.7, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
; EPILOG:       exit1.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit1.unr-lcssa
; EPILOG:       exit1.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    %cmp_early.epil = icmp ne i64 %iv.epil, %trip2
; EPILOG-NEXT:    br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG:       loop_exiting_bb2.epil:
; EPILOG-NEXT:    %unknown.epil = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit1.epilog-lcssa.loopexit1, !llvm.loop !17
; EPILOG:       exit1.epilog-lcssa.loopexit:
; EPILOG-NEXT:    br label %exit1.epilog-lcssa
; EPILOG:       exit1.epilog-lcssa.loopexit1:
; EPILOG-NEXT:    br label %exit1.epilog-lcssa
; EPILOG:       exit1.epilog-lcssa:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test13(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit1.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2:
; EPILOG-BLOCK-NEXT:    %unknown = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT:    %unknown.1 = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !19
; EPILOG-BLOCK:       exit1.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    br label %exit1.unr-lcssa
; EPILOG-BLOCK:       exit1.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    %cmp_early.epil = icmp ne i64 %iv.unr, %trip2
; EPILOG-BLOCK-NEXT:    br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK:       loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT:    %unknown.epil = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT:    br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit1.epilog-lcssa
; EPILOG-BLOCK:       exit1.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1.epilog-lcssa
; EPILOG-BLOCK:       exit1.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test13(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.prol = icmp ne i64 %iv.prol, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG:       loop_exiting_bb2.prol:
; PROLOG-NEXT:    %unknown.prol = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !17
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit1, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2:
; PROLOG-NEXT:    %unknown = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.1:
; PROLOG-NEXT:    %unknown.1 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.2:
; PROLOG-NEXT:    %unknown.2 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.2, label %loop_latch.2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.3:
; PROLOG-NEXT:    %unknown.3 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.3, label %loop_latch.3, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.4:
; PROLOG-NEXT:    %unknown.4 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.4, label %loop_latch.4, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.5:
; PROLOG-NEXT:    %unknown.5 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.5, label %loop_latch.5, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.6:
; PROLOG-NEXT:    %unknown.6 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.6, label %loop_latch.6, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; PROLOG-NEXT:    br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.7:
; PROLOG-NEXT:    %unknown.7 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.7, label %loop_latch.7, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
; PROLOG:       exit1.unr-lcssa.loopexit:
; PROLOG-NEXT:    br label %exit1.unr-lcssa
; PROLOG:       exit1.unr-lcssa.loopexit1:
; PROLOG-NEXT:    br label %exit1.unr-lcssa
; PROLOG:       exit1.unr-lcssa:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test13(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early.prol = icmp ne i64 0, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK:       loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT:    %unknown.prol = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT:    br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit1, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2:
; PROLOG-BLOCK-NEXT:    %unknown = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-BLOCK-NEXT:    br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT:    %unknown.1 = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !19
; PROLOG-BLOCK:       exit1.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1.unr-lcssa
; PROLOG-BLOCK:       exit1.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
;
entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  call void @bar()
  %cmp_early = icmp ne i64 %iv, %trip2
  br i1 %cmp_early, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
  %unknown = call i1 @unknown_cond()
  br i1 %unknown, label %loop_latch, label %exit1

loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit1

exit1:
  ret void
}

; Mix of invariant and (even in theory) uncomputable exits
define void @test14(i64 %trip, i1 %cond) {
; EPILOG-LABEL: @test14(
; EPILOG-NEXT:  entry:
; EPILOG-NEXT:    %0 = freeze i64 %trip
; EPILOG-NEXT:    %1 = add i64 %0, -1
; EPILOG-NEXT:    %xtraiter = and i64 %0, 7
; EPILOG-NEXT:    %2 = icmp ult i64 %1, 7
; EPILOG-NEXT:    br i1 %2, label %exit1.unr-lcssa, label %entry.new
; EPILOG:       entry.new:
; EPILOG-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-NEXT:    br label %loop_header
; EPILOG:       loop_header:
; EPILOG-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.7, %loop_latch.7 ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2:
; EPILOG-NEXT:    %unknown = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch:
; EPILOG-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.1:
; EPILOG-NEXT:    %unknown.1 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.1:
; EPILOG-NEXT:    %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT:    %niter.next.1 = add nuw nsw i64 %niter.next, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.2:
; EPILOG-NEXT:    %unknown.2 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.2, label %loop_latch.2, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.2:
; EPILOG-NEXT:    %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT:    %niter.next.2 = add nuw nsw i64 %niter.next.1, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.3, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.3:
; EPILOG-NEXT:    %unknown.3 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.3, label %loop_latch.3, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.3:
; EPILOG-NEXT:    %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT:    %niter.next.3 = add nuw nsw i64 %niter.next.2, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.4, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.4:
; EPILOG-NEXT:    %unknown.4 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.4, label %loop_latch.4, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.4:
; EPILOG-NEXT:    %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT:    %niter.next.4 = add nuw nsw i64 %niter.next.3, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.5, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.5:
; EPILOG-NEXT:    %unknown.5 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.5, label %loop_latch.5, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.5:
; EPILOG-NEXT:    %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT:    %niter.next.5 = add nuw nsw i64 %niter.next.4, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.6, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.6:
; EPILOG-NEXT:    %unknown.6 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.6, label %loop_latch.6, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.6:
; EPILOG-NEXT:    %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT:    %niter.next.6 = add nuw nsw i64 %niter.next.5, 1
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.7, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_exiting_bb2.7:
; EPILOG-NEXT:    %unknown.7 = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.7, label %loop_latch.7, label %exit1.epilog-lcssa.loopexit
; EPILOG:       loop_latch.7:
; EPILOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT:    %niter.next.7 = add i64 %niter.next.6, 1
; EPILOG-NEXT:    %niter.ncmp.7 = icmp ne i64 %niter.next.7, %unroll_iter
; EPILOG-NEXT:    br i1 %niter.ncmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
; EPILOG:       exit1.unr-lcssa.loopexit:
; EPILOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT:    br label %exit1.unr-lcssa
; EPILOG:       exit1.unr-lcssa:
; EPILOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG:       loop_header.epil.preheader:
; EPILOG-NEXT:    br label %loop_header.epil
; EPILOG:       loop_header.epil:
; EPILOG-NEXT:    %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT:    %epil.iter = phi i64 [ 0, %loop_header.epil.preheader ], [ %epil.iter.next, %loop_latch.epil ]
; EPILOG-NEXT:    call void @bar()
; EPILOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG:       loop_exiting_bb2.epil:
; EPILOG-NEXT:    %unknown.epil = call i1 @unknown_cond()
; EPILOG-NEXT:    br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG:       loop_latch.epil:
; EPILOG-NEXT:    %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT:    %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT:    %epil.iter.next = add i64 %epil.iter, 1
; EPILOG-NEXT:    %epil.iter.cmp = icmp ne i64 %epil.iter.next, %xtraiter
; EPILOG-NEXT:    br i1 %epil.iter.cmp, label %loop_header.epil, label %exit1.epilog-lcssa.loopexit1, !llvm.loop !18
; EPILOG:       exit1.epilog-lcssa.loopexit:
; EPILOG-NEXT:    br label %exit1.epilog-lcssa
; EPILOG:       exit1.epilog-lcssa.loopexit1:
; EPILOG-NEXT:    br label %exit1.epilog-lcssa
; EPILOG:       exit1.epilog-lcssa:
; EPILOG-NEXT:    br label %exit1
; EPILOG:       exit1:
; EPILOG-NEXT:    ret void
;
; EPILOG-BLOCK-LABEL: @test14(
; EPILOG-BLOCK-NEXT:  entry:
; EPILOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; EPILOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; EPILOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; EPILOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; EPILOG-BLOCK-NEXT:    br i1 %2, label %exit1.unr-lcssa, label %entry.new
; EPILOG-BLOCK:       entry.new:
; EPILOG-BLOCK-NEXT:    %unroll_iter = sub i64 %0, %xtraiter
; EPILOG-BLOCK-NEXT:    br label %loop_header
; EPILOG-BLOCK:       loop_header:
; EPILOG-BLOCK-NEXT:    %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    %niter = phi i64 [ 0, %entry.new ], [ %niter.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2:
; EPILOG-BLOCK-NEXT:    %unknown = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_latch:
; EPILOG-BLOCK-NEXT:    %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT:    %niter.next = add nuw nsw i64 %niter, 1
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT:    %unknown.1 = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK:       loop_latch.1:
; EPILOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT:    %niter.next.1 = add i64 %niter.next, 1
; EPILOG-BLOCK-NEXT:    %niter.ncmp.1 = icmp ne i64 %niter.next.1, %unroll_iter
; EPILOG-BLOCK-NEXT:    br i1 %niter.ncmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !20
; EPILOG-BLOCK:       exit1.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1.unr-lcssa
; EPILOG-BLOCK:       exit1.unr-lcssa:
; EPILOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG-BLOCK:       loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT:    br label %loop_header.epil
; EPILOG-BLOCK:       loop_header.epil:
; EPILOG-BLOCK-NEXT:    call void @bar()
; EPILOG-BLOCK-NEXT:    br i1 %cond, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK:       loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT:    %unknown.epil = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT:    br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK:       loop_latch.epil:
; EPILOG-BLOCK-NEXT:    br label %exit1.epilog-lcssa
; EPILOG-BLOCK:       exit1.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT:    br label %exit1.epilog-lcssa
; EPILOG-BLOCK:       exit1.epilog-lcssa:
; EPILOG-BLOCK-NEXT:    br label %exit1
; EPILOG-BLOCK:       exit1:
; EPILOG-BLOCK-NEXT:    ret void
;
; PROLOG-LABEL: @test14(
; PROLOG-NEXT:  entry:
; PROLOG-NEXT:    %0 = freeze i64 %trip
; PROLOG-NEXT:    %1 = add i64 %0, -1
; PROLOG-NEXT:    %xtraiter = and i64 %0, 7
; PROLOG-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.preheader:
; PROLOG-NEXT:    br label %loop_header.prol
; PROLOG:       loop_header.prol:
; PROLOG-NEXT:    %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    %prol.iter = phi i64 [ 0, %loop_header.prol.preheader ], [ %prol.iter.next, %loop_latch.prol ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG:       loop_exiting_bb2.prol:
; PROLOG-NEXT:    %unknown.prol = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG:       loop_latch.prol:
; PROLOG-NEXT:    %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT:    %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT:    %prol.iter.next = add i64 %prol.iter, 1
; PROLOG-NEXT:    %prol.iter.cmp = icmp ne i64 %prol.iter.next, %xtraiter
; PROLOG-NEXT:    br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !18
; PROLOG:       loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT:    %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT:    br label %loop_header.prol.loopexit
; PROLOG:       loop_header.prol.loopexit:
; PROLOG-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT:    %2 = icmp ult i64 %1, 7
; PROLOG-NEXT:    br i1 %2, label %exit1, label %entry.new
; PROLOG:       entry.new:
; PROLOG-NEXT:    br label %loop_header
; PROLOG:       loop_header:
; PROLOG-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2:
; PROLOG-NEXT:    %unknown = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch:
; PROLOG-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.1:
; PROLOG-NEXT:    %unknown.1 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.1:
; PROLOG-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.2:
; PROLOG-NEXT:    %unknown.2 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.2, label %loop_latch.2, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.2:
; PROLOG-NEXT:    %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.3, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.3:
; PROLOG-NEXT:    %unknown.3 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.3, label %loop_latch.3, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.3:
; PROLOG-NEXT:    %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.4, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.4:
; PROLOG-NEXT:    %unknown.4 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.4, label %loop_latch.4, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.4:
; PROLOG-NEXT:    %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.5, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.5:
; PROLOG-NEXT:    %unknown.5 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.5, label %loop_latch.5, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.5:
; PROLOG-NEXT:    %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.6, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.6:
; PROLOG-NEXT:    %unknown.6 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.6, label %loop_latch.6, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.6:
; PROLOG-NEXT:    %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT:    call void @bar()
; PROLOG-NEXT:    br i1 %cond, label %loop_exiting_bb2.7, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_exiting_bb2.7:
; PROLOG-NEXT:    %unknown.7 = call i1 @unknown_cond()
; PROLOG-NEXT:    br i1 %unknown.7, label %loop_latch.7, label %exit1.unr-lcssa.loopexit
; PROLOG:       loop_latch.7:
; PROLOG-NEXT:    %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT:    %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT:    br i1 %cmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
; PROLOG:       exit1.unr-lcssa.loopexit:
; PROLOG-NEXT:    br label %exit1.unr-lcssa
; PROLOG:       exit1.unr-lcssa.loopexit1:
; PROLOG-NEXT:    br label %exit1.unr-lcssa
; PROLOG:       exit1.unr-lcssa:
; PROLOG-NEXT:    br label %exit1
; PROLOG:       exit1:
; PROLOG-NEXT:    ret void
;
; PROLOG-BLOCK-LABEL: @test14(
; PROLOG-BLOCK-NEXT:  entry:
; PROLOG-BLOCK-NEXT:    %0 = freeze i64 %trip
; PROLOG-BLOCK-NEXT:    %1 = add i64 %0, -1
; PROLOG-BLOCK-NEXT:    %xtraiter = and i64 %0, 1
; PROLOG-BLOCK-NEXT:    %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT:    br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol
; PROLOG-BLOCK:       loop_header.prol:
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK:       loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT:    %unknown.prol = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT:    br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK:       loop_latch.prol:
; PROLOG-BLOCK-NEXT:    br label %loop_header.prol.loopexit
; PROLOG-BLOCK:       loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT:    %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT:    %2 = icmp ult i64 %1, 1
; PROLOG-BLOCK-NEXT:    br i1 %2, label %exit1, label %entry.new
; PROLOG-BLOCK:       entry.new:
; PROLOG-BLOCK-NEXT:    br label %loop_header
; PROLOG-BLOCK:       loop_header:
; PROLOG-BLOCK-NEXT:    %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2:
; PROLOG-BLOCK-NEXT:    %unknown = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT:    br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_latch:
; PROLOG-BLOCK-NEXT:    %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT:    call void @bar()
; PROLOG-BLOCK-NEXT:    br i1 %cond, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT:    %unknown.1 = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT:    br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK:       loop_latch.1:
; PROLOG-BLOCK-NEXT:    %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT:    %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT:    br i1 %cmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !20
; PROLOG-BLOCK:       exit1.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT:    br label %exit1.unr-lcssa
; PROLOG-BLOCK:       exit1.unr-lcssa:
; PROLOG-BLOCK-NEXT:    br label %exit1
; PROLOG-BLOCK:       exit1:
; PROLOG-BLOCK-NEXT:    ret void
;
entry:
  br label %loop_header

loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  call void @bar()
  br i1 %cond, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
  %unknown = call i1 @unknown_cond()
  br i1 %unknown, label %loop_latch, label %exit1

loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit1

exit1:
  ret void
}