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