From: Jakub Staszak <jstaszak@apple.com>
Date: Thu, 28 Jul 2011 20:09:31 +0000 (+0000)
Subject: Speed up BlockFrequencyInfo a little bit.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2f9427c6a3ce9badd04b00de778ab6af3c3c88d6;p=oota-llvm.git

Speed up BlockFrequencyInfo a little bit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136381 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Analysis/BlockFrequencyImpl.h b/include/llvm/Analysis/BlockFrequencyImpl.h
index bfe2d66d1ce..3e3a772ccd5 100644
--- a/include/llvm/Analysis/BlockFrequencyImpl.h
+++ b/include/llvm/Analysis/BlockFrequencyImpl.h
@@ -224,11 +224,13 @@ class BlockFrequencyImpl {
 
     SmallPtrSet<BlockT *, 8> BlocksInLoop;
 
-    for (rpot_iterator I = rpot_at(Head), E = rpot_end(); I != E; ++I) {
+    for (rpot_iterator I = rpot_at(Head), E = rpot_at(Tail); ; ++I) {
       BlockT *BB = *I;
       doBlock(BB, Head, BlocksInLoop);
 
       BlocksInLoop.insert(BB);
+      if (I != E)
+        break;
     }
 
     // Compute loop's cyclic probability using backedges probabilities.