diff options
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/pr44835.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/pr44835.ll b/llvm/test/Transforms/InstCombine/pr44835.ll new file mode 100644 index 00000000000..46c9fca6bb7 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/pr44835.ll @@ -0,0 +1,29 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -S -instcombine < %s | FileCheck %s + +; This test used to cause an infinite loop in the load/store min/max bitcast +; transform. + +define void @test(i32* %p, i32* %p2) { +; CHECK-LABEL: @test( +; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P:%.*]], align 4 +; CHECK-NEXT: [[V2:%.*]] = load i32, i32* [[P2:%.*]], align 4 +; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[V2]], [[V]] +; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[CMP]], i32 [[V2]], i32 [[V]] +; CHECK-NEXT: store i32 [[TMP1]], i32* [[P]], align 4 +; CHECK-NEXT: ret void +; + %v = load i32, i32* %p, align 4 + %v2 = load i32, i32* %p2, align 4 + %cmp = icmp ult i32 %v2, %v + %sel = select i1 %cmp, i32* %p2, i32* %p + %p8 = bitcast i32* %p to i8* + %sel8 = bitcast i32* %sel to i8* + call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %p8, i8* align 4 %sel8, i64 4, i1 false) + ret void +} + +; Function Attrs: argmemonly nounwind willreturn +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #0 + +attributes #0 = { argmemonly nounwind willreturn } |
