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[BranchFolding] Change function name related with merging MMOs. NFC

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Summary:
Removing MMOs is not our prefer behavior any more.

Reviewers: mcrosier, reames
   
Differential Revision: http://reviews.llvm.org/D17668


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262580 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Junmo Park 2016-03-03 03:57:20 +00:00
parent bf86946b60
commit 26c0c1e822
1 changed files with 5 additions and 7 deletions
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12
lib/CodeGen/BranchFolding.cpp
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@ -745,11 +745,9 @@ bool BranchFolder::CreateCommonTailOnlyBlock(MachineBasicBlock *&PredBB,
}
static void
removeMMOsFromMemoryOperations(MachineBasicBlock::iterator MBBIStartPos,
MachineBasicBlock &MBBCommon) {
// Remove MMOs from memory operations in the common block
// when they do not match the ones from the block being tail-merged.
// This ensures later passes conservatively compute dependencies.
mergeMMOsFromMemoryOperations(MachineBasicBlock::iterator MBBIStartPos,
MachineBasicBlock &MBBCommon) {
// Merge MMOs from memory operations in the common block.
MachineBasicBlock *MBB = MBBIStartPos->getParent();
// Note CommonTailLen does not necessarily matches the size of
// the common BB nor all its instructions because of debug
@ -900,8 +898,8 @@ bool BranchFolder::TryTailMergeBlocks(MachineBasicBlock *SuccBB,
continue;
DEBUG(dbgs() << "BB#" << SameTails[i].getBlock()->getNumber()
<< (i == e-1 ? "" : ", "));
// Remove MMOs from memory operations as needed.
removeMMOsFromMemoryOperations(SameTails[i].getTailStartPos(), *MBB);
// Merge MMOs from memory operations as needed.
mergeMMOsFromMemoryOperations(SameTails[i].getTailStartPos(), *MBB);
// Hack the end off BB i, making it jump to BB commonTailIndex instead.
ReplaceTailWithBranchTo(SameTails[i].getTailStartPos(), MBB);
// BB i is no longer a predecessor of SuccBB; remove it from the worklist.