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

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llvm-svn: 231837
This commit is contained in:
Chad Rosier 2015-03-10 20:29:59 +00:00
parent 63f263f727
commit dad3b0ec71
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/BranchFolding.cpp
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@ -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;