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| author | Devang Patel <dpatel@apple.com> | 2007-09-24 20:02:42 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2007-09-24 20:02:42 +0000 |
| commit | 128459b85b59530e511ea17b3cc3a5b8ee3e8bd4 (patch) | |
| tree | 2f0e73eb6e409f6b9ea41c76a1d3cc6615b6e5b7 /lib/Transforms/Scalar/LICM.cpp | |
| parent | d81ccc2806b2c8a498d16f1a547d0cc9c00d602d (diff) | |
| download | external_llvm-128459b85b59530e511ea17b3cc3a5b8ee3e8bd4.zip external_llvm-128459b85b59530e511ea17b3cc3a5b8ee3e8bd4.tar.gz external_llvm-128459b85b59530e511ea17b3cc3a5b8ee3e8bd4.tar.bz2 | |
Do not promote null values because it may be unsafe to do so.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42270 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/LICM.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LICM.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index 3058f74..f112ba8 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -800,6 +800,10 @@ void LICM::FindPromotableValuesInLoop( break; } + // Do not promote null values because it may be unsafe to do so. + if (isa<ConstantPointerNull>(V)) + PointerOk = false; + if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(V)) { // If GEP base is NULL then the calculated address used by Store or // Load instruction is invalid. Do not promote this value because |