From c641adae19c57132984d59a496a75b41ae15e27b Mon Sep 17 00:00:00 2001
From: Jakub Staszak <kubastaszak@gmail.com>
Date: Fri, 25 Jan 2013 21:44:27 +0000
Subject: [PATCH] Use const reference instead of vector copying.

llvm-svn: 173497
---
 llvm/lib/CodeGen/MachineScheduler.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 821a4f2..adf9a57 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -467,7 +467,8 @@ void ScheduleDAGMI::initRegPressure() {
   // Cache the list of excess pressure sets in this region. This will also track
   // the max pressure in the scheduled code for these sets.
   RegionCriticalPSets.clear();
-  std::vector<unsigned> RegionPressure = RPTracker.getPressure().MaxSetPressure;
+  const std::vector<unsigned> &RegionPressure =
+    RPTracker.getPressure().MaxSetPressure;
   for (unsigned i = 0, e = RegionPressure.size(); i < e; ++i) {
     unsigned Limit = TRI->getRegPressureSetLimit(i);
     DEBUG(dbgs() << TRI->getRegPressureSetName(i)
-- 
2.7.4