llvm/test/Transforms/LoopUnroll/scev-invalidation-lcssa.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes='print<scalar-evolution>,loop-unroll' -unroll-runtime < %s 2>/dev/null | FileCheck %s

define i32 @f(i1 %cond1) #0 !prof !0 {
; CHECK-LABEL: define i32 @f
; CHECK-SAME: (i1 [[COND1:%.*]]) {{.*}}{
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP1_PEEL_BEGIN:%.*]]
; CHECK:       loop1.peel.begin:
; CHECK-NEXT:    br label [[LOOP1_PEEL:%.*]]
; CHECK:       loop1.peel:
; CHECK-NEXT:    [[LD_PEEL:%.*]] = load i64, ptr null, align 8
; CHECK-NEXT:    br i1 [[COND1]], label [[LOOP1_PEEL_NEXT:%.*]], label [[EXIT1:%.*]], !prof [[PROF1:![0-9]+]]
; CHECK:       loop1.peel.next:
; CHECK-NEXT:    br label [[LOOP1_PEEL_NEXT1:%.*]]
; CHECK:       loop1.peel.next1:
; CHECK-NEXT:    br label [[ENTRY_PEEL_NEWPH:%.*]]
; CHECK:       entry.peel.newph:
; CHECK-NEXT:    br label [[LOOP1:%.*]]
; CHECK:       loop1:
; CHECK-NEXT:    [[LD:%.*]] = load i64, ptr null, align 8
; CHECK-NEXT:    br i1 [[COND1]], label [[LOOP1]], label [[EXIT1_LOOPEXIT:%.*]], !prof [[PROF1]], !llvm.loop [[LOOP2:![0-9]+]]
; CHECK:       exit1.loopexit:
; CHECK-NEXT:    [[LD_LCSSA_PH:%.*]] = phi i64 [ [[LD]], [[LOOP1]] ]
; CHECK-NEXT:    br label [[EXIT1]]
; CHECK:       exit1:
; CHECK-NEXT:    [[LD_LCSSA:%.*]] = phi i64 [ [[LD_PEEL]], [[LOOP1_PEEL]] ], [ [[LD_LCSSA_PH]], [[EXIT1_LOOPEXIT]] ]
; CHECK-NEXT:    br label [[ENTRY2:%.*]]
; CHECK:       entry2:
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[LD_LCSSA]], 1
; CHECK-NEXT:    [[XTRAITER:%.*]] = and i64 [[TMP0]], 7
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i64 [[LD_LCSSA]], 7
; CHECK-NEXT:    br i1 [[TMP1]], label [[LOOP2_EPIL_PREHEADER:%.*]], label [[ENTRY2_NEW:%.*]]
; CHECK:       entry2.new:
; CHECK-NEXT:    [[UNROLL_ITER:%.*]] = sub i64 [[TMP0]], [[XTRAITER]]
; CHECK-NEXT:    br label [[LOOP2:%.*]]
; CHECK:       loop2:
; CHECK-NEXT:    [[PHI:%.*]] = phi i64 [ 0, [[ENTRY2_NEW]] ], [ [[INC_7:%.*]], [[LOOP2]] ]
; CHECK-NEXT:    [[NITER:%.*]] = phi i64 [ 0, [[ENTRY2_NEW]] ], [ [[NITER_NEXT_7:%.*]], [[LOOP2]] ]
; CHECK-NEXT:    [[INC_7]] = add i64 [[PHI]], 8
; CHECK-NEXT:    [[NITER_NEXT_7]] = add i64 [[NITER]], 8
; CHECK-NEXT:    [[NITER_NCMP_7:%.*]] = icmp eq i64 [[NITER_NEXT_7]], [[UNROLL_ITER]]
; CHECK-NEXT:    br i1 [[NITER_NCMP_7]], label [[EXIT2_UNR_LCSSA:%.*]], label [[LOOP2]]
; CHECK:       exit2.unr-lcssa:
; CHECK-NEXT:    [[PHI_UNR:%.*]] = phi i64 [ [[INC_7]], [[LOOP2]] ]
; CHECK-NEXT:    [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0
; CHECK-NEXT:    br i1 [[LCMP_MOD]], label [[LOOP2_EPIL_PREHEADER]], label [[EXIT2:%.*]]
; CHECK:       loop2.epil.preheader:
; CHECK-NEXT:    [[PHI_EPIL_INIT:%.*]] = phi i64 [ 0, [[ENTRY2]] ], [ [[PHI_UNR]], [[EXIT2_UNR_LCSSA]] ]
; CHECK-NEXT:    [[LCMP_MOD2:%.*]] = icmp ne i64 [[XTRAITER]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[LCMP_MOD2]])
; CHECK-NEXT:    br label [[LOOP2_EPIL:%.*]]
; CHECK:       loop2.epil:
; CHECK-NEXT:    [[PHI_EPIL:%.*]] = phi i64 [ [[PHI_EPIL_INIT]], [[LOOP2_EPIL_PREHEADER]] ], [ [[INC_EPIL:%.*]], [[LOOP2_EPIL]] ]
; CHECK-NEXT:    [[EPIL_ITER:%.*]] = phi i64 [ 0, [[LOOP2_EPIL_PREHEADER]] ], [ [[EPIL_ITER_NEXT:%.*]], [[LOOP2_EPIL]] ]
; CHECK-NEXT:    [[INC_EPIL]] = add i64 [[PHI_EPIL]], 1
; CHECK-NEXT:    [[COND2_EPIL:%.*]] = icmp eq i64 [[LD_LCSSA]], [[PHI_EPIL]]
; CHECK-NEXT:    [[EPIL_ITER_NEXT]] = add i64 [[EPIL_ITER]], 1
; CHECK-NEXT:    [[EPIL_ITER_CMP:%.*]] = icmp ne i64 [[EPIL_ITER_NEXT]], [[XTRAITER]]
; CHECK-NEXT:    br i1 [[EPIL_ITER_CMP]], label [[LOOP2_EPIL]], label [[EXIT2_EPILOG_LCSSA:%.*]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       exit2.epilog-lcssa:
; CHECK-NEXT:    br label [[EXIT2]]
; CHECK:       exit2:
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %loop1

loop1:
  %ld = load i64, ptr null, align 8
  br i1 %cond1, label %loop1, label %exit1, !prof !1

exit1:
  br label %entry2

entry2:
  br label %loop2

loop2:
  %phi = phi i64 [ 0, %entry2 ], [ %inc, %loop2 ]
  %inc = add i64 %phi, 1
  %cond2 = icmp eq i64 %ld, %phi
  br i1 %cond2, label %exit2, label %loop2

exit2:
  ret i32 0
}

!0 = !{!"function_entry_count", i64 1}
!1 = !{!"branch_weights", i32 123, i32 472}