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

llvm-svn: 153949

1 files changed, 3 insertions, 4 deletions

diff --git a/llvm/lib/VMCore/Metadata.cpp b/llvm/lib/VMCore/Metadata.cpp
index e3a08d4949c..46363eed525 100644
--- a/llvm/lib/VMCore/Metadata.cpp
+++ b/llvm/lib/VMCore/Metadata.cpp
@@ -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() {