MISched: minor improvement, initialize remaining resources before the first scheduling decision.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170449 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index c7afa08..d49eda2 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -1166,6 +1166,16 @@
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::