forked from OSchip/llvm-project
38 lines
1.4 KiB
LLVM
38 lines
1.4 KiB
LLVM
; RUN: opt -S -tbaa -cfl-aa -gvn < %s | FileCheck -check-prefix=CFLAA %s
|
|
; RUN: opt -S -tbaa -gvn < %s | FileCheck %s
|
|
; Adapted from the BasicAA full-store-partial-alias.ll test.
|
|
|
|
; CFL AA should notice that the store stores to the entire %u object,
|
|
; so the %tmp5 load is PartialAlias with the store and suppress TBAA.
|
|
; Without CFL AA, 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 {
|
|
; CFLAA: 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 !4, metadata !4, i64 0}
|
|
!1 = metadata !{metadata !"omnipotent char", metadata !2}
|
|
!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
|
|
!3 = metadata !{metadata !5, metadata !5, i64 0}
|
|
!4 = metadata !{metadata !"double", metadata !1}
|
|
!5 = metadata !{metadata !"int", metadata !1}
|