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fix typos; NFC

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llvm-svn: 227253
This commit is contained in:
Sanjay Patel 2015-01-27 22:16:52 +00:00
parent d53b43fe11
commit 6b280777b7
1 changed files with 4 additions and 4 deletions
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8
llvm/lib/CodeGen/MachineCombiner.cpp
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@ -125,7 +125,7 @@ MachineCombiner::getDepth(SmallVectorImpl<MachineInstr *> &InsInstrs,
SmallVector<unsigned, 16> InstrDepth;
assert(TSchedModel.hasInstrSchedModel() && "Missing machine model\n");
// Foreach instruction in in the new sequence compute the depth based on the
// For each instruction in the new sequence compute the depth based on the
// operands. Use the trace information when possible. For new operands which
// are tracked in the InstrIdxForVirtReg map depth is looked up in InstrDepth
for (auto *InstrPtr : InsInstrs) { // for each Use
@ -215,8 +215,8 @@ unsigned MachineCombiner::getLatency(MachineInstr *Root, MachineInstr *NewRoot,
/// lengthen the critical path. The DAGCombine code sequence ends in MI
/// (Machine Instruction) Root. The new code sequence ends in MI NewRoot. A
/// necessary condition for the new sequence to replace the old sequence is that
/// is cannot lengthen the critical path. This is decided by the formula
/// (NewRootDepth + NewRootLatency) <= (RootDepth + RootLatency + RootSlack)).
/// it cannot lengthen the critical path. This is decided by the formula
/// (NewRootDepth + NewRootLatency) <= (RootDepth + RootLatency + RootSlack)).
/// The slack is the number of cycles Root can be delayed before the critical
/// patch becomes longer.
bool MachineCombiner::preservesCriticalPathLen(
@ -300,7 +300,7 @@ bool MachineCombiner::preservesResourceLen(
}
/// \returns true when new instruction sequence should be generated
/// independent if it lenghtens critical path or not
/// independent if it lengthens critical path or not
bool MachineCombiner::doSubstitute(unsigned NewSize, unsigned OldSize) {
if (OptSize && (NewSize < OldSize))
return true;