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1; RUN: opt < %s -S -passes=memcpyopt | FileCheck --match-full-lines %s2 3declare void @use(ptr)4 5; Alias scopes are merged by taking the intersection of domains, then the union of the scopes within those domains6define i8 @test(i8 %input) {7 %tmp = alloca i88 %dst = alloca i89 %src = alloca i810; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst, ptr align 8 %src, i64 1, i1 false), !alias.scope ![[SCOPE:[0-9]+]]11 call void @llvm.lifetime.start.p0(ptr nonnull %src), !noalias !412 store i8 %input, ptr %src13 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp, ptr align 8 %src, i64 1, i1 false), !alias.scope !014 call void @llvm.lifetime.end.p0(ptr nonnull %src), !noalias !415 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst, ptr align 8 %tmp, i64 1, i1 false), !alias.scope !416 %ret_value = load i8, ptr %dst17 call void @use(ptr %src)18 ret i8 %ret_value19}20 21; Merged scope contains "callee0: %a" and "callee0 : %b"22; CHECK-DAG: ![[CALLEE0_A:[0-9]+]] = distinct !{!{{[0-9]+}}, !{{[0-9]+}}, !"callee0: %a"}23; CHECK-DAG: ![[CALLEE0_B:[0-9]+]] = distinct !{!{{[0-9]+}}, !{{[0-9]+}}, !"callee0: %b"}24; CHECK-DAG: ![[SCOPE]] = !{![[CALLEE0_A]], ![[CALLEE0_B]]}25 26declare void @llvm.lifetime.start.p0(ptr nocapture)27declare void @llvm.lifetime.end.p0(ptr nocapture)28declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)29 30!0 = !{!1, !7}31!1 = distinct !{!1, !3, !"callee0: %a"}32!2 = distinct !{!2, !3, !"callee0: %b"}33!3 = distinct !{!3, !"callee0"}34 35!4 = !{!2, !5}36!5 = distinct !{!5, !6, !"callee1: %a"}37!6 = distinct !{!6, !"callee1"}38 39!7 = distinct !{!7, !8, !"callee2: %a"}40!8 = distinct !{!8, !"callee2"}41