| ; RUN: opt < %s -S -memcpyopt | FileCheck --match-full-lines %s |
| |
| ; Alias scopes are merged by taking the intersection of domains, then the union of the scopes within those domains |
| define i8 @test(i8 %input) { |
| %tmp = alloca i8 |
| %dst = alloca i8 |
| %src = alloca i8 |
| ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %dst, i8* align 8 %src, i64 1, i1 false), !alias.scope ![[SCOPE:[0-9]+]] |
| call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %src), !noalias !4 |
| store i8 %input, i8* %src |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp, i8* align 8 %src, i64 1, i1 false), !alias.scope !0 |
| call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %src), !noalias !4 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %dst, i8* align 8 %tmp, i64 1, i1 false), !alias.scope !4 |
| %ret_value = load i8, i8* %dst |
| ret i8 %ret_value |
| } |
| |
| ; Merged scope contains "callee0: %a" and "callee0 : %b" |
| ; CHECK-DAG: ![[CALLEE0_A:[0-9]+]] = distinct !{!{{[0-9]+}}, !{{[0-9]+}}, !"callee0: %a"} |
| ; CHECK-DAG: ![[CALLEE0_B:[0-9]+]] = distinct !{!{{[0-9]+}}, !{{[0-9]+}}, !"callee0: %b"} |
| ; CHECK-DAG: ![[SCOPE]] = !{![[CALLEE0_A]], ![[CALLEE0_B]]} |
| |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i1) |
| |
| !0 = !{!1, !7} |
| !1 = distinct !{!1, !3, !"callee0: %a"} |
| !2 = distinct !{!2, !3, !"callee0: %b"} |
| !3 = distinct !{!3, !"callee0"} |
| |
| !4 = !{!2, !5} |
| !5 = distinct !{!5, !6, !"callee1: %a"} |
| !6 = distinct !{!6, !"callee1"} |
| |
| !7 = distinct !{!7, !8, !"callee2: %a"} |
| !8 = distinct !{!8, !"callee2"} |
