1; RUN: opt -tbaa -disable-basicaa -gvn -instcombine -S < %s | FileCheck %s --check-prefix=TBAA
2; RUN: opt -tbaa -gvn -instcombine -S < %s | FileCheck %s --check-prefix=BASICAA
3
4; According to the TBAA metadata the load and store don't alias. However,
5; according to the actual code, they do. Disabling basicaa shows the raw TBAA
6; results.
7
8target datalayout = "e-p:64:64:64"
9
10; Test for simple MustAlias aliasing.
11
12; TBAA:    @trouble
13; TBAA:      ret i32 0
14; BASICAA: @trouble
15; BASICAA:   ret i32 1075000115
16define i32 @trouble(i32* %x) nounwind {
17entry:
18  store i32 0, i32* %x, !tbaa !0
19  %0 = bitcast i32* %x to float*
20  store float 0x4002666660000000, float* %0, !tbaa !3
21  %tmp3 = load i32, i32* %x, !tbaa !0
22  ret i32 %tmp3
23}
24
25; Test for PartialAlias aliasing. GVN doesn't yet eliminate the load
26; in the BasicAA case.
27
28; TBAA:    @offset
29; TBAA:      ret i64 0
30; BASICAA: @offset
31; BASICAA:   ret i64 %tmp3
32define i64 @offset(i64* %x) nounwind {
33entry:
34  store i64 0, i64* %x, !tbaa !4
35  %0 = bitcast i64* %x to i8*
36  %1 = getelementptr i8, i8* %0, i64 1
37  store i8 1, i8* %1, !tbaa !5
38  %tmp3 = load i64, i64* %x, !tbaa !4
39  ret i64 %tmp3
40}
41
42!0 = !{!2, !2, i64 0}
43!1 = !{!"simple"}
44!2 = !{!"int", !1}
45!3 = !{!6, !6, i64 0}
46!4 = !{!7, !7, i64 0}
47!5 = !{!8, !8, i64 0}
48!6 = !{!"float", !1}
49!7 = !{!"long", !1}
50!8 = !{!"small", !1}
51