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MachineScheduler: enable biasCriticalPath for all DAGs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173318 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2013-01-24 02:09:57 +00:00
parent 66658dd9a1
commit db4170697f
1 changed files with 4 additions and 0 deletions
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lib/CodeGen/MachineScheduler.cpp
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@ -563,6 +563,10 @@ void ScheduleDAGMI::releaseRoots() {
for (std::vector<SUnit>::iterator
I = SUnits.begin(), E = SUnits.end(); I != E; ++I) {
SUnit *SU = &(*I);
// Order predecessors so DFSResult follows the critical path.
SU->biasCriticalPath();
// A SUnit is ready to top schedule if it has no predecessors.
if (!I->NumPredsLeft && SU != &EntrySU)
SchedImpl->releaseTopNode(SU);