1 ; RUN: opt -S -disable-basicaa -tbaa -cfl-steens-aa -gvn < %s | FileCheck -check-prefix=CFLSteensAA %s
2 ; RUN: opt -S -disable-basicaa -tbaa -gvn < %s | FileCheck %s
3 ; Adapted from the BasicAA full-store-partial-alias.ll test.
5 ; CFL AA could notice that the store stores to the entire %u object,
6 ; so the %tmp5 load is PartialAlias with the store and suppress TBAA.
7 ; FIXME: However, right now, CFLSteensAA cannot prove PartialAlias here
8 ; Without CFL AA, TBAA should say that %tmp5 is NoAlias with the store.
10 target datalayout = "e-p:64:64:64"
12 %union.anon = type { double }
14 @u = global %union.anon { double -2.500000e-01 }, align 8
15 @endianness_test = global i64 1, align 8
17 define i32 @signbit(double %x) nounwind {
18 ; FIXME: This would be ret i32 %tmp5.lobit if CFLSteensAA could prove PartialAlias
19 ; CFLSteensAA: ret i32 0
22 %u = alloca %union.anon, align 8
23 %tmp9 = getelementptr inbounds %union.anon, %union.anon* %u, i64 0, i32 0
24 store double %x, double* %tmp9, align 8, !tbaa !0
25 %tmp2 = load i32, i32* bitcast (i64* @endianness_test to i32*), align 8, !tbaa !3
26 %idxprom = sext i32 %tmp2 to i64
27 %tmp4 = bitcast %union.anon* %u to [2 x i32]*
28 %arrayidx = getelementptr inbounds [2 x i32], [2 x i32]* %tmp4, i64 0, i64 %idxprom
29 %tmp5 = load i32, i32* %arrayidx, align 4, !tbaa !3
30 %tmp5.lobit = lshr i32 %tmp5, 31
35 !1 = !{!"omnipotent char", !2}
36 !2 = !{!"Simple C/C++ TBAA"}