1; RUN: opt -S -aa-pipeline=basic-aa,tbaa -passes=gvn < %s | FileCheck -check-prefix=BASICAA %s 2; RUN: opt -S -aa-pipeline=tbaa -passes=gvn < %s | FileCheck %s 3; rdar://8875631, rdar://8875069 4 5; BasicAA 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 BasicAA, 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; BASICAA: ret i32 %tmp5.lobit 18; CHECK: ret i32 0 19entry: 20 %u = alloca %union.anon, align 8 21 store double %x, ptr %u, align 8, !tbaa !0 22 %tmp2 = load i32, ptr @endianness_test, align 8, !tbaa !3 23 %idxprom = sext i32 %tmp2 to i64 24 %arrayidx = getelementptr inbounds [2 x i32], ptr %u, i64 0, i64 %idxprom 25 %tmp5 = load i32, ptr %arrayidx, align 4, !tbaa !3 26 %tmp5.lobit = lshr i32 %tmp5, 31 27 ret i32 %tmp5.lobit 28} 29 30!0 = !{!4, !4, i64 0} 31!1 = !{!"omnipotent char", !2} 32!2 = !{!"Simple C/C++ TBAA"} 33!3 = !{!5, !5, i64 0} 34!4 = !{!"double", !1} 35!5 = !{!"int", !1} 36