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Introduce a helper to combine instruction metadata.

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Replace the old code in GVN and BBVectorize with it. Update SimplifyCFG to use
it.

Patch by Björn Steinbrink!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215723 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-08-15 15:46:38 +00:00
parent f36437d945
commit d37ec47374
5 changed files with 74 additions and 74 deletions
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5
include/llvm/Transforms/Utils/Local.h
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@ -275,6 +275,11 @@ bool replaceDbgDeclareForAlloca(AllocaInst *AI, Value *NewAllocaAddress,
/// Returns true if any basic block was removed.
bool removeUnreachableBlocks(Function &F);
/// \brief Combine the metadata of two instructions so that K can replace J
///
/// Metadata not listed as known via KnownIDs is removed
void combineMetadata(Instruction *K, const Instruction *J, ArrayRef<unsigned> KnownIDs);
} // End llvm namespace
#endif