From: Jakub Staszak <kubastaszak@gmail.com>
Date: Wed, 14 Nov 2012 22:42:17 +0000 (+0000)
Subject: Use reserve() to avoid vector reallocation.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8762a6bc2b83dfc11e784772311ad0b8fa5211e2;p=oota-llvm.git

Use reserve() to avoid vector reallocation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167991 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp
index 7e662e5385b..df679752860 100644
--- a/lib/CodeGen/RegisterCoalescer.cpp
+++ b/lib/CodeGen/RegisterCoalescer.cpp
@@ -2068,6 +2068,7 @@ void RegisterCoalescer::joinAllIntervals() {
   assert(WorkList.empty() && LocalWorkList.empty() && "Old data still around.");
 
   std::vector<MBBPriorityInfo> MBBs;
+  MBBs.reserve(MF->size());
   for (MachineFunction::iterator I = MF->begin(), E = MF->end();I != E;++I){
     MachineBasicBlock *MBB = I;
     MBBs.push_back(MBBPriorityInfo(MBB, Loops->getLoopDepth(MBB),