1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -tbaa -basic-aa -memcpyopt -instcombine < %s | FileCheck %s
3
4target datalayout = "e-p:64:64:64"
5
6; The second memcpy is redundant and can be deleted. There's an intervening store, but
7; it has a TBAA tag which declares that it is unrelated.
8
9define void @foo(i8* nocapture %p, i8* nocapture %q, i8* nocapture %s) nounwind {
10; CHECK: @foo
11; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(16) %p, i8* noundef nonnull align 1 dereferenceable(16) %q, i64 16, i1 false), !tbaa !0
12; CHECK-NEXT: store i8 2, i8* %s, align 1, !tbaa [[TAGA:!.*]]
13; CHECK-NEXT: ret void
14  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p, i8* %q, i64 16, i1 false), !tbaa !2
15  store i8 2, i8* %s, align 1, !tbaa !1
16  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %q, i8* %p, i64 16, i1 false), !tbaa !2
17  ret void
18}
19
20declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
21
22; CHECK: [[TAGA]] = !{[[TYPEA:!.*]], [[TYPEA]], i64 0}
23; CHECK: [[TYPEA]] = !{!"A", !{{.*}}}
24!0 = !{!"tbaa root"}
25!1 = !{!3, !3, i64 0}
26!2 = !{!4, !4, i64 0}
27!3 = !{!"A", !0}
28!4 = !{!"B", !0}
29