1; RUN: opt -tbaa -basicaa -gvn -S < %s | FileCheck %s
2
3target datalayout = "e-p:64:64:64"
4
5; GVN should preserve the TBAA tag on loads when doing PRE.
6
7; CHECK-LABEL: @test(
8; CHECK: %tmp33.pre = load i16* %P, align 2, !tbaa !0
9; CHECK: br label %for.body
10define void @test(i16 *%P, i16* %Q) nounwind {
11entry:
12  br i1 undef, label %bb.nph, label %for.end
13
14bb.nph:                                           ; preds = %entry
15  br label %for.body
16
17for.body:                                         ; preds = %for.body, %bb.nph
18  %tmp33 = load i16* %P, align 2, !tbaa !0
19  store i16 %tmp33, i16* %Q
20
21  store i16 0, i16* %P, align 2, !tbaa !0
22  br i1 false, label %for.end, label %for.body
23
24for.end:                                          ; preds = %for.body, %entry
25  ret void
26}
27
28!0 = metadata !{metadata !3, metadata !3, i64 0}
29!1 = metadata !{metadata !"omnipotent char", metadata !2}
30!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
31!3 = metadata !{metadata !"short", metadata !1}
32