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MISched: minor improvement, initialize remaining resources before the first scheduling decision.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170449 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-12-18 20:52:49 +00:00
parent 7f1d6d688f
commit 071966f6bf
1 changed files with 10 additions and 0 deletions
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10
lib/CodeGen/MachineScheduler.cpp
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@ -1166,6 +1166,16 @@ init(ScheduleDAGMI *DAG, const TargetSchedModel *SchedModel) {
RemainingCounts[PIdx] += (Factor * PI->Cycles);
}
}
for (unsigned PIdx = 0, PEnd = SchedModel->getNumProcResourceKinds();
PIdx != PEnd; ++PIdx) {
if ((int)(RemainingCounts[PIdx] - RemainingCounts[CritResIdx])
>= (int)SchedModel->getLatencyFactor()) {
CritResIdx = PIdx;
}
}
MaxRemainingCount = std::max(
RemainingMicroOps * SchedModel->getMicroOpFactor(),
RemainingCounts[CritResIdx]);
}
void ConvergingScheduler::SchedBoundary::