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; 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}
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