diff --git a/llvm/test/Transforms/MemCpyOpt/stack-move.ll b/llvm/test/Transforms/MemCpyOpt/stack-move.ll index d67a6fe34d34e..5e04c9d330493 100644 --- a/llvm/test/Transforms/MemCpyOpt/stack-move.ll +++ b/llvm/test/Transforms/MemCpyOpt/stack-move.ll @@ -321,6 +321,37 @@ define void @remove_alloca_metadata() { } ; TODO: Merge alloca and remove memcpy. +; Tests that we remove scoped noalias metadata from a call. +; And confirm that don't crash on noalias metadata on lifetime markers. +define void @noalias_on_lifetime() { +; CHECK-LABEL: define void @noalias_on_lifetime() { +; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4 +; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4 +; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]]) +; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]]) +; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4 +; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]]), !alias.scope !0 +; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false) +; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]]), !alias.scope !0 +; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]]), !noalias !0 +; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]]), !noalias !0 +; CHECK-NEXT: ret void +; + %src = alloca %struct.Foo, align 4 + %dest = alloca %struct.Foo, align 4 + call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src) + call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest) + store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src + %1 = call i32 @use_nocapture(ptr nocapture %src), !alias.scope !2 + + call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false) + + call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src), !alias.scope !2 + %2 = call i32 @use_nocapture(ptr nocapture %dest), !noalias !2 + call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest), !noalias !2 + ret void +} + ; Tests that we can merge alloca if the dest and src has only refs except lifetime intrinsics. define void @src_ref_dest_ref_after_copy() { ; CHECK-LABEL: define void @src_ref_dest_ref_after_copy() {