1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -aa-pipeline=tbaa,basic-aa -passes=memcpyopt,instcombine < %s | FileCheck %s
4 target datalayout = "e-p:64:64:64"
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.
9 define void @foo(ptr nocapture %p, ptr nocapture %q, ptr nocapture %s) nounwind {
11 ; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(16) %p, ptr noundef nonnull align 1 dereferenceable(16) %q, i64 16, i1 false), !tbaa !0
12 ; CHECK-NEXT: store i8 2, ptr %s, align 1, !tbaa [[TAGA:!.*]]
13 ; CHECK-NEXT: ret void
14 tail call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %q, i64 16, i1 false), !tbaa !2
15 store i8 2, ptr %s, align 1, !tbaa !1
16 tail call void @llvm.memcpy.p0.p0.i64(ptr %q, ptr %p, i64 16, i1 false), !tbaa !2
20 declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
22 ; CHECK: [[TAGA]] = !{[[TYPEA:!.*]], [[TYPEA]], i64 0}
23 ; CHECK: [[TYPEA]] = !{!"A", !{{.*}}}