1 ; RUN: opt -instcombine -S < %s | FileCheck %s
3 ; Verify that instcombine preserves TBAA tags when converting a memcpy into
4 ; a scalar load and store.
6 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
8 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
12 define void @test1(%A* %a1, %A* %a2) {
15 ; CHECK: %[[LOAD:.*]] = load i32, {{.*}}, !tbaa [[TAG_A:!.*]]
16 ; CHECK: store i32 %[[LOAD]], {{.*}}, !tbaa [[TAG_A]]
18 %0 = bitcast %A* %a1 to i8*
19 %1 = bitcast %A* %a2 to i8*
20 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 4, i1 false), !tbaa !4 ; TAG_A
24 %B = type { i32 (i8*, i32*, double*)** }
26 define i32 (i8*, i32*, double*)*** @test2() {
30 %tmp = alloca %B, align 8
31 %tmp1 = bitcast %B* %tmp to i8*
32 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp1, i8* align 8 undef, i64 8, i1 false), !tbaa !7 ; TAG_B
33 %tmp2 = getelementptr %B, %B* %tmp, i32 0, i32 0
34 %tmp3 = load i32 (i8*, i32*, double*)**, i32 (i8*, i32*, double*)*** %tmp2
35 ret i32 (i8*, i32*, double*)*** %tmp2
41 !3 = !{!1, i64 4, !"A", !2, i64 0, i64 4}
42 !4 = !{!3, !3, i64 0, i64 4}
43 !5 = !{!1, !"pointer"}
44 !6 = !{!1, i64 8, !"B", !5, i64 0, i64 8}
45 !7 = !{!6, !6, i64 0, i64 8}
47 ; CHECK-DAG: [[ROOT:!.*]] = !{!"root"}
48 ; CHECK-DAG: [[TYPE_char:!.*]] = !{[[ROOT]], !"char"}
49 ; CHECK-DAG: [[TYPE_float:!.*]] = !{[[TYPE_char]], !"float"}
50 ; CHECK-DAG: [[TYPE_A:!.*]] = !{[[TYPE_char]], i64 4, !"A", [[TYPE_float]], i64 0, i64 4}
51 ; CHECK-DAG: [[TAG_A]] = !{[[TYPE_A]], [[TYPE_A]], i64 0, i64 4}
52 ; Note that the memcpy() call in test2() transforms into an
53 ; undecorated 'store undef', so TAG_B is not present in the output.