| ; RUN: opt -S -tbaa -basicaa -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. |
| |
| ; CHECK: @foo |
| ; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p, i8* %q, i64 16, i32 1, i1 false), !tbaa !0 |
| ; CHECK-NEXT: store i8 2, i8* %s, align 1, !tbaa !2 |
| ; CHECK-NEXT: ret void |
| define void @foo(i8* nocapture %p, i8* nocapture %q, i8* nocapture %s) nounwind { |
| tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p, i8* %q, i64 16, i32 1, i1 false), !tbaa !2 |
| store i8 2, i8* %s, align 1, !tbaa !1 |
| tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %q, i8* %p, i64 16, i32 1, i1 false), !tbaa !2 |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind |
| |
| !0 = metadata !{metadata !"tbaa root", null} |
| !1 = metadata !{metadata !"A", metadata !0} |
| !2 = metadata !{metadata !"B", metadata !0} |
