| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -aa-pipeline=tbaa,basic-aa -passes=memcpyopt,instcombine < %s | FileCheck %s |
| |
| target datalayout = "e-p:64:64:64" |
| |
| ; The second memcpy is redundant and can be deleted. There's an intervening store, but |
| ; it has a TBAA tag which declares that it is unrelated. |
| |
| define void @foo(ptr nocapture %p, ptr nocapture %q, ptr nocapture %s) nounwind { |
| ; CHECK: @foo |
| ; 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 |
| ; CHECK-NEXT: store i8 2, ptr %s, align 1, !tbaa [[TAGA:!.*]] |
| ; CHECK-NEXT: ret void |
| tail call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %q, i64 16, i1 false), !tbaa !2 |
| store i8 2, ptr %s, align 1, !tbaa !1 |
| tail call void @llvm.memcpy.p0.p0.i64(ptr %q, ptr %p, i64 16, i1 false), !tbaa !2 |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind |
| |
| ; CHECK: [[TAGA]] = !{[[TYPEA:!.*]], [[TYPEA]], i64 0} |
| ; CHECK: [[TYPEA]] = !{!"A", !{{.*}}} |
| !0 = !{!"tbaa root"} |
| !1 = !{!3, !3, i64 0} |
| !2 = !{!4, !4, i64 0} |
| !3 = !{!"A", !0} |
| !4 = !{!"B", !0} |
