1; RUN: opt -S -tbaa -cfl-aa -gvn < %s | FileCheck -check-prefix=CFLAA %s
2; RUN: opt -S -tbaa -gvn < %s | FileCheck %s
3; Adapted from the BasicAA full-store-partial-alias.ll test.
4
5; CFL AA should notice that the store stores to the entire %u object,
6; so the %tmp5 load is PartialAlias with the store and suppress TBAA.
7; Without CFL AA, TBAA should say that %tmp5 is NoAlias with the store.
8
9target datalayout = "e-p:64:64:64"
10
11%union.anon = type { double }
12
13@u = global %union.anon { double -2.500000e-01 }, align 8
14@endianness_test = global i64 1, align 8
15
16define i32 @signbit(double %x) nounwind {
17; CFLAA: ret i32 %tmp5.lobit
18; CHECK:   ret i32 0
19entry:
20  %u = alloca %union.anon, align 8
21  %tmp9 = getelementptr inbounds %union.anon* %u, i64 0, i32 0
22  store double %x, double* %tmp9, align 8, !tbaa !0
23  %tmp2 = load i32* bitcast (i64* @endianness_test to i32*), align 8, !tbaa !3
24  %idxprom = sext i32 %tmp2 to i64
25  %tmp4 = bitcast %union.anon* %u to [2 x i32]*
26  %arrayidx = getelementptr inbounds [2 x i32]* %tmp4, i64 0, i64 %idxprom
27  %tmp5 = load i32* %arrayidx, align 4, !tbaa !3
28  %tmp5.lobit = lshr i32 %tmp5, 31
29  ret i32 %tmp5.lobit
30}
31
32!0 = !{!4, !4, i64 0}
33!1 = !{!"omnipotent char", !2}
34!2 = !{!"Simple C/C++ TBAA", null}
35!3 = !{!5, !5, i64 0}
36!4 = !{!"double", !1}
37!5 = !{!"int", !1}
38