diff options
Diffstat (limited to 'llvm/test/Transforms/GVN/PRE/preserve-tbaa.ll')
| -rw-r--r-- | llvm/test/Transforms/GVN/PRE/preserve-tbaa.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/llvm/test/Transforms/GVN/PRE/preserve-tbaa.ll b/llvm/test/Transforms/GVN/PRE/preserve-tbaa.ll new file mode 100644 index 00000000000..19467eeff40 --- /dev/null +++ b/llvm/test/Transforms/GVN/PRE/preserve-tbaa.ll @@ -0,0 +1,31 @@ +; RUN: opt -tbaa -basicaa -gvn -S < %s | FileCheck %s + +target datalayout = "e-p:64:64:64" + +; GVN should preserve the TBAA tag on loads when doing PRE. + +; CHECK-LABEL: @test( +; CHECK: %tmp33.pre = load i16, i16* %P, align 2, !tbaa !0 +; CHECK: br label %for.body +define void @test(i16 *%P, i16* %Q) nounwind { +entry: + br i1 undef, label %bb.nph, label %for.end + +bb.nph: ; preds = %entry + br label %for.body + +for.body: ; preds = %for.body, %bb.nph + %tmp33 = load i16, i16* %P, align 2, !tbaa !0 + store i16 %tmp33, i16* %Q + + store i16 0, i16* %P, align 2, !tbaa !0 + br i1 false, label %for.end, label %for.body + +for.end: ; preds = %for.body, %entry + ret void +} + +!0 = !{!3, !3, i64 0} +!1 = !{!"omnipotent char", !2} +!2 = !{!"Simple C/C++ TBAA", null} +!3 = !{!"short", !1} |
