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; RUN: opt < %s -S -memcpyopt | FileCheck --match-full-lines %s
; Make sure callslot optimization merges alias.scope metadata correctly when it merges instructions.
; Merging here naively generates:
; call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %dst, i8* align 8 %src, i64 1, i1 false), !alias.scope !3
; call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %src), !noalias !0
; ...
; !0 = !{!1}
; !1 = distinct !{!1, !2, !"callee1: %a"}
; !2 = distinct !{!2, !"callee1"}
; !3 = !{!1, !4}
; !4 = distinct !{!4, !5, !"callee0: %a"}
; !5 = distinct !{!5, !"callee0"}
; Which is incorrect because the lifetime.end of %src will now "noalias" the above memcpy.
define i8 @test(i8 %input) {
%tmp = alloca i8
%dst = alloca i8
%src = alloca i8
; NOTE: we're matching the full line and looking for the lack of !alias.scope here
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %dst, i8* align 8 %src, i64 1, i1 false)
call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %src), !noalias !3
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 !3
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %dst, i8* align 8 %tmp, i64 1, i1 false), !alias.scope !3
%ret_value = load i8, i8* %dst
ret i8 %ret_value
}
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}
!1 = distinct !{!1, !2, !"callee0: %a"}
!2 = distinct !{!2, !"callee0"}
!3 = !{!4}
!4 = distinct !{!4, !5, !"callee1: %a"}
!5 = distinct !{!5, !"callee1"}
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