llvm/test/Transforms/LoopStrengthReduce/X86/expander-crashes.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -loop-reduce %s -S | FileCheck %s

target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.15.0"

; Tests for crashes during SCEV expansion.

%struct.hoge = type { i32, i32, i32, i32 }

define i64 @blam(%struct.hoge* %start, %struct.hoge* %end, %struct.hoge* %ptr.2) {
; CHECK-LABEL: @blam(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[START1:%.*]] = ptrtoint %struct.hoge* [[START:%.*]] to i64
; CHECK-NEXT:    br label [[LOOP_1_HEADER:%.*]]
; CHECK:       loop.1.header:
; CHECK-NEXT:    [[LSR_IV5:%.*]] = phi i64 [ [[LSR_IV_NEXT6:%.*]], [[LOOP_1_HEADER]] ], [ [[START1]], [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi %struct.hoge* [ [[IV_NEXT:%.*]], [[LOOP_1_HEADER]] ], [ [[START]], [[ENTRY]] ]
; CHECK-NEXT:    [[IV_NEXT]] = getelementptr inbounds [[STRUCT_HOGE:%.*]], %struct.hoge* [[IV]], i64 1
; CHECK-NEXT:    [[LSR_IV_NEXT6]] = add i64 [[LSR_IV5]], 16
; CHECK-NEXT:    [[EC:%.*]] = icmp eq %struct.hoge* [[IV_NEXT]], [[END:%.*]]
; CHECK-NEXT:    br i1 [[EC]], label [[LOOP_2_PH:%.*]], label [[LOOP_1_HEADER]]
; CHECK:       loop.2.ph:
; CHECK-NEXT:    br label [[LOOP_2_HEADER:%.*]]
; CHECK:       loop.2.header:
; CHECK-NEXT:    [[LSR_IV2:%.*]] = phi i64 [ [[LSR_IV_NEXT3:%.*]], [[LOOP_2_LATCH:%.*]] ], [ [[LSR_IV_NEXT6]], [[LOOP_2_PH]] ]
; CHECK-NEXT:    [[IV2:%.*]] = phi %struct.hoge* [ [[IV2_NEXT:%.*]], [[LOOP_2_LATCH]] ], [ [[IV_NEXT]], [[LOOP_2_PH]] ]
; CHECK-NEXT:    [[IV24:%.*]] = bitcast %struct.hoge* [[IV2]] to i32*
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[LSR_IV2]], 12
; CHECK-NEXT:    call void @use.i64(i64 [[TMP0]])
; CHECK-NEXT:    [[SCEVGEP:%.*]] = getelementptr i32, i32* [[IV24]], i64 2
; CHECK-NEXT:    store i32 10, i32* [[SCEVGEP]], align 8
; CHECK-NEXT:    [[EC_2:%.*]] = icmp ugt %struct.hoge* [[IV2]], [[PTR_2:%.*]]
; CHECK-NEXT:    br i1 [[EC_2]], label [[LOOP_2_EXIT:%.*]], label [[LOOP_2_LATCH]]
; CHECK:       loop.2.latch:
; CHECK-NEXT:    [[IV2_NEXT]] = getelementptr inbounds [[STRUCT_HOGE]], %struct.hoge* [[IV2]], i64 1
; CHECK-NEXT:    [[LSR_IV_NEXT3]] = add i64 [[LSR_IV2]], 16
; CHECK-NEXT:    br label [[LOOP_2_HEADER]]
; CHECK:       loop.2.exit:
; CHECK-NEXT:    ret i64 [[LSR_IV2]]
;
entry:
  br label %loop.1.header

loop.1.header:
  %iv = phi %struct.hoge* [ %iv.next, %loop.1.header ], [ %start, %entry ]
  %iv.next = getelementptr inbounds %struct.hoge, %struct.hoge* %iv, i64 1
  %ec = icmp eq %struct.hoge* %iv.next, %end
  br i1 %ec, label %loop.2.ph, label %loop.1.header

loop.2.ph:
  br label %loop.2.header

loop.2.header:
  %iv2 = phi %struct.hoge* [ %iv2.next, %loop.2.latch ], [ %iv.next, %loop.2.ph ]
  %tmp7 = getelementptr inbounds %struct.hoge, %struct.hoge* %iv2, i64 0, i32 3
  %tmp8 = ptrtoint i32* %tmp7 to i64
  call void @use.i64(i64 %tmp8)
  %tmp9 = getelementptr inbounds %struct.hoge, %struct.hoge* %iv2, i64 0, i32 2
  store i32 10, i32* %tmp9, align 8
  %ec.2 = icmp ugt %struct.hoge* %iv2, %ptr.2
  br i1 %ec.2, label %loop.2.exit, label %loop.2.latch

loop.2.latch:
  %iv2.next = getelementptr inbounds %struct.hoge, %struct.hoge* %iv2, i64 1
  br label %loop.2.header

loop.2.exit:                                             ; preds = %bb6
  %iv2.cast = ptrtoint %struct.hoge* %iv2 to i64
  ret i64 %iv2.cast
}


declare void @use.i64(i64)