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Teach combineMetadata how to merge 'nonnull' metadata.

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combineMetadata is used when merging two instructions into one.  This change teaches it how to merge 'nonnull' - i.e. only preserve it on the new instruction if it's set on both sources.  This isn't actually used yet since I haven't adjusted any of the call sites to pass in nonnull as a 'known metadata'.  



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220325 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Philip Reames 2014-10-21 21:02:19 +00:00
parent 7b60e0eb39
commit 5b69592c5a
1 changed files with 4 additions and 0 deletions
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4
lib/Transforms/Utils/Local.cpp
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@ -1339,6 +1339,10 @@ void llvm::combineMetadata(Instruction *K, const Instruction *J, ArrayRef<unsign
// Only set the !invariant.load if it is present in both instructions.
K->setMetadata(Kind, JMD);
break;
case LLVMContext::MD_nonnull:
// Only set the !nonnull if it is present in both instructions.
K->setMetadata(Kind, JMD);
break;
}
}
}