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| author | Dan Gohman <gohman@apple.com> | 2010-11-11 01:03:30 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-11-11 01:03:30 +0000 |
| commit | f00833c4013446701506a156d370584520c86b45 (patch) | |
| tree | f288ed7f711f2025ef14a61b668b902a860b8836 /test/Analysis/TypeBasedAliasAnalysis | |
| parent | a05f60b2413150ee11de7072f71d68d9567359ac (diff) | |
| download | llvm-f00833c4013446701506a156d370584520c86b45.tar.gz llvm-f00833c4013446701506a156d370584520c86b45.tar.bz2 llvm-f00833c4013446701506a156d370584520c86b45.tar.xz | |
Add a testcase which demonstrates alias analysis pass precedence.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118755 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Analysis/TypeBasedAliasAnalysis')
| -rw-r--r-- | test/Analysis/TypeBasedAliasAnalysis/precedence.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Analysis/TypeBasedAliasAnalysis/precedence.ll b/test/Analysis/TypeBasedAliasAnalysis/precedence.ll new file mode 100644 index 0000000000..b2095b0572 --- /dev/null +++ b/test/Analysis/TypeBasedAliasAnalysis/precedence.ll @@ -0,0 +1,21 @@ +; RUN: opt -enable-tbaa -basicaa -tbaa -gvn -instcombine -S < %s | grep {ret i32 0} +; RUN: opt -enable-tbaa -tbaa -basicaa -gvn -instcombine -S < %s | grep {ret i32 1075000115} + +; According to the TBAA metadata the load and store don't alias. However, +; according to the actual code, they do. The order of the alias analysis +; passes should determine which of these takes precedence. + +target datalayout = "e-p:64:64:64" + +define i32 @trouble(i32* %x) nounwind ssp { +entry: + store i32 0, i32* %x, !tbaa !0 + %0 = bitcast i32* %x to float* + store float 0x4002666660000000, float* %0, !tbaa !3 + %tmp3 = load i32* %x, !tbaa !0 + ret i32 %tmp3 +} + +!0 = metadata !{metadata !"int", metadata !1} +!1 = metadata !{metadata !"simple"} +!3 = metadata !{metadata !"float", metadata !1} |