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Give RegMax higher priority.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184133 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2013-06-17 21:45:13 +00:00
parent f8e6d31341
commit a626f5072e
1 changed files with 9 additions and 9 deletions
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18
lib/CodeGen/MachineScheduler.cpp
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@ -1108,9 +1108,9 @@ public:
/// Represent the type of SchedCandidate found within a single queue.
/// pickNodeBidirectional depends on these listed by decreasing priority.
enum CandReason {
NoCand, PhysRegCopy, RegExcess, RegCritical, Cluster, Weak,
NoCand, PhysRegCopy, RegExcess, RegCritical, Cluster, Weak, RegMax,
ResourceReduce, ResourceDemand, BotHeightReduce, BotPathReduce,
TopDepthReduce, TopPathReduce, SingleMax, NextDefUse, NodeOrder};
TopDepthReduce, TopPathReduce, NextDefUse, NodeOrder};
#ifndef NDEBUG
static const char *getReasonStr(ConvergingScheduler::CandReason Reason);
@ -2118,6 +2118,11 @@ void ConvergingScheduler::tryCandidate(SchedCandidate &Cand,
TryCand, Cand, Weak)) {
return;
}
// Avoid increasing the max pressure of the entire region.
if (tryLess(TryCand.RPDelta.CurrentMax.UnitIncrease,
Cand.RPDelta.CurrentMax.UnitIncrease, TryCand, Cand, RegMax))
return;
// Avoid critical resource consumption and balance the schedule.
TryCand.initResourceDelta(DAG, SchedModel);
if (tryLess(TryCand.ResDelta.CritResources, Cand.ResDelta.CritResources,
@ -2152,11 +2157,6 @@ void ConvergingScheduler::tryCandidate(SchedCandidate &Cand,
}
}
// Avoid increasing the max pressure of the entire region.
if (tryLess(TryCand.RPDelta.CurrentMax.UnitIncrease,
Cand.RPDelta.CurrentMax.UnitIncrease, TryCand, Cand, SingleMax))
return;
// Prefer immediate defs/users of the last scheduled instruction. This is a
// local pressure avoidance strategy that also makes the machine code
// readable.
@ -2181,7 +2181,7 @@ const char *ConvergingScheduler::getReasonStr(
case RegCritical: return "REG-CRIT ";
case Cluster: return "CLUSTER ";
case Weak: return "WEAK ";
case SingleMax: return "REG-MAX ";
case RegMax: return "REG-MAX ";
case ResourceReduce: return "RES-REDUCE";
case ResourceDemand: return "RES-DEMAND";
case TopDepthReduce: return "TOP-DEPTH ";
@ -2207,7 +2207,7 @@ void ConvergingScheduler::traceCandidate(const SchedCandidate &Cand) {
case RegCritical:
P = Cand.RPDelta.CriticalMax;
break;
case SingleMax:
case RegMax:
P = Cand.RPDelta.CurrentMax;
break;
case ResourceReduce: