From: Nate Begeman <natebegeman@mac.com>
Date: Tue, 7 Dec 2004 05:25:53 +0000 (+0000)
Subject: Move virtual function call out of loop to speed up getFreePhysReg by about
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=80ad87d2271673b4f9148d64c91ee6338978c9fc;p=oota-llvm.git

Move virtual function call out of loop to speed up getFreePhysReg by about
20%, shaving 0.1s off hbd compile time on my g5.  Yay.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18592 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index c54152a1492..140846fe01e 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -608,8 +608,8 @@ unsigned RA::getFreePhysReg(LiveInterval* cur)
   const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(cur->reg);
 
   unsigned freeReg = 0;
-  for (TargetRegisterClass::iterator i = rc->allocation_order_begin(*mf_);
-       i != rc->allocation_order_end(*mf_); ++i) {
+  for (TargetRegisterClass::iterator i = rc->allocation_order_begin(*mf_),
+       e = rc->allocation_order_end(*mf_); i != e; ++i) {
     unsigned reg = *i;
     if (prt_->isRegAvail(reg) &&
         (!freeReg || inactiveCounts[freeReg] < inactiveCounts[reg]))