From 07317f7d333fd03ae216865a6f0e8b3bde5f030d Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Fri, 28 Jan 2011 05:48:15 +0000
Subject: [PATCH] Reduce the number of functions we look at in the first pass,
 and preallocate the function equality set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124475 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/MergeFunctions.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/Transforms/IPO/MergeFunctions.cpp b/lib/Transforms/IPO/MergeFunctions.cpp
index d4ecd55d033..30afaab47cf 100644
--- a/lib/Transforms/IPO/MergeFunctions.cpp
+++ b/lib/Transforms/IPO/MergeFunctions.cpp
@@ -798,8 +798,10 @@ bool MergeFunctions::runOnModule(Module &M) {
   TD = getAnalysisIfAvailable<TargetData>();
 
   for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
-    Deferred.push_back(WeakVH(I));
+    if (!I->isDeclaration() && !I->hasAvailableExternallyLinkage())
+      Deferred.push_back(WeakVH(I));
   }
+  FnSet.resize(Deferred.size());
 
   do {
     std::vector<WeakVH> Worklist;