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Reserve space for the eventual filling of the vector. This gives a small speedup.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153949 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-04-03 10:50:09 +00:00
parent 43b32e0cff
commit f563fc35c8
1 changed files with 3 additions and 4 deletions
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7
lib/VMCore/Metadata.cpp
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@ -551,17 +551,16 @@ getAllMetadataOtherThanDebugLocImpl(SmallVectorImpl<std::pair<unsigned,
getContext().pImpl->MetadataStore.count(this) &&
"Shouldn't have called this");
const LLVMContextImpl::MDMapTy &Info =
getContext().pImpl->MetadataStore.find(this)->second;
getContext().pImpl->MetadataStore.find(this)->second;
assert(!Info.empty() && "Shouldn't have called this");
Result.reserve(Info.size());
Result.append(Info.begin(), Info.end());
// Sort the resulting array so it is stable.
if (Result.size() > 1)
array_pod_sort(Result.begin(), Result.end());
}
/// clearMetadataHashEntries - Clear all hashtable-based metadata from
/// this instruction.
void Instruction::clearMetadataHashEntries() {