diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCombiner.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/MachineCombiner.cpp b/llvm/lib/CodeGen/MachineCombiner.cpp index efb463f8810..7637a6474ff 100644 --- a/llvm/lib/CodeGen/MachineCombiner.cpp +++ b/llvm/lib/CodeGen/MachineCombiner.cpp @@ -407,8 +407,8 @@ bool MachineCombiner::preservesResourceLen( /// \returns true when new instruction sequence should be generated /// independent if it lengthens critical path or not bool MachineCombiner::doSubstitute(unsigned NewSize, unsigned OldSize) { - if (OptSize && (NewSize < OldSize)) - return true; + if (OptSize) // First of all check OptSize option + return (NewSize < OldSize); // Only substitute if new size < old size if (!TSchedModel.hasInstrSchedModelOrItineraries()) return true; return false; @@ -588,7 +588,7 @@ bool MachineCombiner::combineInstructions(MachineBasicBlock *MBB) { // Eagerly stop after the first pattern fires. Changed = true; break; - } else { + } else if (!OptSize || (NewInstCount <= OldInstCount)) { // For big basic blocks, we only compute the full trace the first time // we hit this. We do not invalidate the trace, but instead update the // instruction depths incrementally. |
