1 ; RUN: opt -instcombine -S < %s | FileCheck %s
3 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"
5 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
7 ; Verify that instcombine preserves TBAA tags when converting a memcpy into
8 ; a scalar load and store.
10 %struct.test1 = type { float }
13 ; CHECK: %[[LOAD:.*]] = load i32, i32* %{{.*}}, align 4, !tbaa !0
14 ; CHECK: store i32 %[[LOAD:.*]], i32* %{{.*}}, align 4, !tbaa !0
16 define void @test1(%struct.test1* nocapture %a, %struct.test1* nocapture %b) {
18 %0 = bitcast %struct.test1* %a to i8*
19 %1 = bitcast %struct.test1* %b to i8*
20 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 4, i1 false), !tbaa.struct !3
24 %struct.test2 = type { i32 (i8*, i32*, double*)** }
26 define i32 (i8*, i32*, double*)*** @test2() {
27 ; CHECK-LABEL: @test2(
30 %tmp = alloca %struct.test2, align 8
31 %tmp1 = bitcast %struct.test2* %tmp to i8*
32 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp1, i8* align 8 undef, i64 8, i1 false), !tbaa.struct !4
33 %tmp2 = getelementptr %struct.test2, %struct.test2* %tmp, i32 0, i32 0
34 %tmp3 = load i32 (i8*, i32*, double*)**, i32 (i8*, i32*, double*)*** %tmp2
35 ret i32 (i8*, i32*, double*)*** %tmp2
38 ; CHECK: !0 = !{!1, !1, i64 0}
39 ; CHECK: !1 = !{!"float", !2}
41 !0 = !{!"Simple C/C++ TBAA"}
42 !1 = !{!"omnipotent char", !0}
44 !3 = !{i64 0, i64 4, !2}
45 !4 = !{i64 0, i64 8, null}