commit 99fb8d17ec08dbd3b465e0ef431a5ad9a2bbc84a
author Chad Rosier <mcrosier@codeaurora.org> Tue Mar 10 20:29:59 2015 +0000
committer Chad Rosier <mcrosier@codeaurora.org> Tue Mar 10 20:29:59 2015 +0000
tree 6b80ef937216bdd564c6e2c83a4141c15772af3d
parent d388e930ce6d8aa1b47e0ce40017f6542887349e

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

llvm-svn: 231837

llvm/lib/CodeGen/BranchFolding.cpp

diff --git a/llvm/lib/CodeGen/BranchFolding.cpp b/llvm/lib/CodeGen/BranchFolding.cpp
index 05bf31b..a2e9816 100644
--- a/llvm/lib/CodeGen/BranchFolding.cpp
+++ b/llvm/lib/CodeGen/BranchFolding.cpp
@@ -755,11 +755,13 @@
     ++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;