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 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(ptr nocapture %p, ptr nocapture %q, ptr nocapture %s) nounwind { 10; CHECK: @foo 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 17 ret void 18} 19 20declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr 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