From 6209869f83979319e2e5791382f09b83e54191e0 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 2 Jun 2010 23:05:04 +0000
Subject: Speedup bitcode writer. Do not walk all values for all functions to
 emit function local metadata. In one testcase, probably worst case scenario,
 the 70x speed up is seen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105360 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Bitcode/Writer/BitcodeWriter.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'lib/Bitcode/Writer/BitcodeWriter.cpp')

diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 860b7e9a68..98d567e767 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -577,10 +577,9 @@ static void WriteFunctionLocalMetadata(const Function &F,
                                        BitstreamWriter &Stream) {
   bool StartedMetadataBlock = false;
   SmallVector<uint64_t, 64> Record;
-  const ValueEnumerator::ValueList &Vals = VE.getMDValues();
-  
+  const SmallVector<const MDNode *, 8> &Vals = VE.getFunctionLocalMDValues();
   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
-    if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first))
+    if (const MDNode *N = Vals[i])
       if (N->isFunctionLocal() && N->getFunction() == &F) {
         if (!StartedMetadataBlock) {
           Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
@@ -588,7 +587,7 @@ static void WriteFunctionLocalMetadata(const Function &F,
         }
         WriteMDNode(N, VE, Stream, Record);
       }
-
+      
   if (StartedMetadataBlock)
     Stream.ExitBlock();
 }
-- 
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