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      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 
      8 target 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
     16 define i32 @trouble(i32* %x) nounwind {
     17 entry:
     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
     32 define i64 @offset(i64* %x) nounwind {
     33 entry:
     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