mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
36 lines
1.3 KiB
LLVM
36 lines
1.3 KiB
LLVM
; RUN: opt -S -tbaa -basicaa -gvn < %s | FileCheck -check-prefix=BASICAA %s
|
|
; RUN: opt -S -tbaa -gvn < %s | FileCheck %s
|
|
; rdar://8875631, rdar://8875069
|
|
|
|
; BasicAA should notice that the store stores to the entire %u object,
|
|
; so the %tmp5 load is PartialAlias with the store and suppress TBAA.
|
|
; Without BasicAA, TBAA should say that %tmp5 is NoAlias with the store.
|
|
|
|
target datalayout = "e-p:64:64:64"
|
|
|
|
%union.anon = type { double }
|
|
|
|
@u = global %union.anon { double -2.500000e-01 }, align 8
|
|
@endianness_test = global i64 1, align 8
|
|
|
|
define i32 @signbit(double %x) nounwind {
|
|
; BASICAA: ret i32 %tmp5.lobit
|
|
; CHECK: ret i32 0
|
|
entry:
|
|
%u = alloca %union.anon, align 8
|
|
%tmp9 = getelementptr inbounds %union.anon* %u, i64 0, i32 0
|
|
store double %x, double* %tmp9, align 8, !tbaa !0
|
|
%tmp2 = load i32* bitcast (i64* @endianness_test to i32*), align 8, !tbaa !3
|
|
%idxprom = sext i32 %tmp2 to i64
|
|
%tmp4 = bitcast %union.anon* %u to [2 x i32]*
|
|
%arrayidx = getelementptr inbounds [2 x i32]* %tmp4, i64 0, i64 %idxprom
|
|
%tmp5 = load i32* %arrayidx, align 4, !tbaa !3
|
|
%tmp5.lobit = lshr i32 %tmp5, 31
|
|
ret i32 %tmp5.lobit
|
|
}
|
|
|
|
!0 = metadata !{metadata !"double", metadata !1}
|
|
!1 = metadata !{metadata !"omnipotent char", metadata !2}
|
|
!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
|
|
!3 = metadata !{metadata !"int", metadata !1}
|