From 69eea727793a000a941760449f87fed9cb67a2a9 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 14 Jul 2011 18:53:50 +0000
Subject: 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.

llvm-svn: 135172
---
 llvm/lib/Transforms/Utils/ValueMapper.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/Transforms/Utils/ValueMapper.cpp')

diff --git a/llvm/lib/Transforms/Utils/ValueMapper.cpp b/llvm/lib/Transforms/Utils/ValueMapper.cpp
index 30fc60081d5..e728fd16a30 100644
--- a/llvm/lib/Transforms/Utils/ValueMapper.cpp
+++ b/llvm/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;
-- 
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