| ; RUN: opt -tbaa -disable-basic-aa -gvn -instcombine -S < %s | FileCheck %s --check-prefix=TBAA |
| ; RUN: opt -tbaa -gvn -instcombine -S < %s | FileCheck %s --check-prefix=BASICAA |
| |
| ; According to the TBAA metadata the load and store don't alias. However, |
| ; according to the actual code, they do. Disabling basicaa shows the raw TBAA |
| ; results. |
| |
| target datalayout = "e-p:64:64:64" |
| |
| ; Test for simple MustAlias aliasing. |
| |
| ; TBAA: @trouble |
| ; TBAA: ret i32 0 |
| ; BASICAA: @trouble |
| ; BASICAA: ret i32 1075000115 |
| define i32 @trouble(i32* %x) nounwind { |
| entry: |
| store i32 0, i32* %x, !tbaa !0 |
| %0 = bitcast i32* %x to float* |
| store float 0x4002666660000000, float* %0, !tbaa !3 |
| %tmp3 = load i32, i32* %x, !tbaa !0 |
| ret i32 %tmp3 |
| } |
| |
| ; Test for PartialAlias aliasing. GVN doesn't yet eliminate the load |
| ; in the BasicAA case. |
| |
| ; TBAA: @offset |
| ; TBAA: ret i64 0 |
| ; BASICAA: @offset |
| ; BASICAA: ret i64 %tmp3 |
| define i64 @offset(i64* %x) nounwind { |
| entry: |
| store i64 0, i64* %x, !tbaa !4 |
| %0 = bitcast i64* %x to i8* |
| %1 = getelementptr i8, i8* %0, i64 1 |
| store i8 1, i8* %1, !tbaa !5 |
| %tmp3 = load i64, i64* %x, !tbaa !4 |
| ret i64 %tmp3 |
| } |
| |
| !0 = !{!2, !2, i64 0} |
| !1 = !{!"simple"} |
| !2 = !{!"int", !1} |
| !3 = !{!6, !6, i64 0} |
| !4 = !{!7, !7, i64 0} |
| !5 = !{!8, !8, i64 0} |
| !6 = !{!"float", !1} |
| !7 = !{!"long", !1} |
| !8 = !{!"small", !1} |
