From: Chad Rosier <mcrosier@codeaurora.org>
Date: Tue, 10 Mar 2015 20:29:59 +0000 (+0000)
Subject: Don't evaluate rend() on every iteration of the loop.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=09fc12a14e15ab617729e47f260879d1dfd2f358;p=oota-llvm.git

Don't evaluate rend() on every iteration of the loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231837 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 05bf31b3ba0..a2e981680c6 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -755,11 +755,13 @@ removeMMOsFromMemoryOperations(MachineBasicBlock::iterator MBBIStartPos,
     ++CommonTailLen;
 
   MachineBasicBlock::reverse_iterator MBBI = MBB->rbegin();
+  MachineBasicBlock::reverse_iterator MBBIE = MBB->rend();
   MachineBasicBlock::reverse_iterator MBBICommon = MBBCommon.rbegin();
   MachineBasicBlock::reverse_iterator MBBIECommon = MBBCommon.rend();
 
   while (CommonTailLen--) {
-    assert(MBBI != MBB->rend() && "Reached BB end within common tail length!");
+    assert(MBBI != MBBIE && "Reached BB end within common tail length!");
+    (void)MBBIE;
 
     if (MBBI->isDebugValue()) {
       ++MBBI;