diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/DeadStoreElimination/simple.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/simple.ll b/test/Transforms/DeadStoreElimination/simple.ll index 1aa62bb..0c05b15 100644 --- a/test/Transforms/DeadStoreElimination/simple.ll +++ b/test/Transforms/DeadStoreElimination/simple.ll @@ -177,3 +177,36 @@ define void @test14(i32* %Q) { ; CHECK-NEXT: ret void } + +; PR8701 + +;; Fully dead overwrite of memcpy. +define void @test15(i8* %P, i8* %Q) nounwind ssp { + tail call void @llvm.memcpy.i64(i8* %P, i8* %Q, i64 12, i32 1) + tail call void @llvm.memcpy.i64(i8* %P, i8* %Q, i64 12, i32 1) + ret void +; CHECK: @test15 +; CHECK-NEXT: call void @llvm.memcpy +; CHECK-NEXT: ret +} + +;; Full overwrite of smaller memcpy. +define void @test16(i8* %P, i8* %Q) nounwind ssp { + tail call void @llvm.memcpy.i64(i8* %P, i8* %Q, i64 8, i32 1) + tail call void @llvm.memcpy.i64(i8* %P, i8* %Q, i64 12, i32 1) + ret void +; CHECK: @test16 +; CHECK-NEXT: call void @llvm.memcpy +; CHECK-NEXT: ret +} + +;; Overwrite of memset by memcpy. +define void @test17(i8* %P, i8* %Q) nounwind ssp { + tail call void @llvm.memset.i64(i8* %P, i8 42, i64 8, i32 1) + tail call void @llvm.memcpy.i64(i8* %P, i8* %Q, i64 12, i32 1) + ret void +; CHECK: @test17 +; CHECK-NEXT: call void @llvm.memcpy +; CHECK-NEXT: ret +} + |