From: Chris Lattner <sabre@nondot.org>
Date: Thu, 14 Jul 2011 18:53:50 +0000 (+0000)
Subject: Stop the ValueMapper from calling getAllMetadata, which unpacks DebugLoc into
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=4692be11a9ecee983760b0420ef2775a4c3706dc;p=oota-llvm.git

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 30fc60081d5..e728fd16a30 100644
--- a/lib/Transforms/Utils/ValueMapper.cpp
+++ b/lib/Transforms/Utils/ValueMapper.cpp
@@ -167,9 +167,10 @@ void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
     }
   }
 
-  // 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;