Stop the ValueMapper from calling getAllMetadata, which unpacks DebugLoc into
an MDNode. This saves a bunch of time and memory in the IR linker, e.g. when
doing LTO of files with debug info.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135172 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/ValueMapper.cpp b/lib/Transforms/Utils/ValueMapper.cpp
index 30fc600..e728fd1 100644
--- a/lib/Transforms/Utils/ValueMapper.cpp
+++ b/lib/Transforms/Utils/ValueMapper.cpp
@@ -167,9 +167,10 @@
}
}
- // Remap attached metadata.
+ // Remap attached metadata. Don't bother remapping DebugLoc, it can never
+ // have mappings to do.
SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
- I->getAllMetadata(MDs);
+ I->getAllMetadataOtherThanDebugLoc(MDs);
for (SmallVectorImpl<std::pair<unsigned, MDNode *> >::iterator
MI = MDs.begin(), ME = MDs.end(); MI != ME; ++MI) {
MDNode *Old = MI->second;