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misched: cleanup main loop

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153159 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-03-21 04:12:07 +00:00
parent e0b51ab8d3
commit 0b0d899f91
1 changed files with 14 additions and 10 deletions
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24
lib/CodeGen/MachineScheduler.cpp
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@ -306,6 +306,7 @@ public:
protected:
void moveInstruction(MachineInstr *MI, MachineBasicBlock::iterator InsertPos);
bool checkSchedLimit();
void releaseSucc(SUnit *SU, SDep *SuccEdge);
void releaseSuccessors(SUnit *SU);
@ -374,6 +375,17 @@ void ScheduleDAGMI::moveInstruction(MachineInstr *MI,
RegionBegin = MI;
}
bool ScheduleDAGMI::checkSchedLimit() {
#ifndef NDEBUG
if (NumInstrsScheduled == MISchedCutoff && MISchedCutoff != ~0U) {
CurrentTop = CurrentBottom;
return false;
}
++NumInstrsScheduled;
#endif
return true;
}
/// schedule - Called back from MachineScheduler::runOnMachineFunction
/// after setting up the current scheduling region.
void ScheduleDAGMI::schedule() {
@ -406,18 +418,10 @@ void ScheduleDAGMI::schedule() {
CurrentBottom = RegionEnd;
bool IsTopNode = false;
while (SUnit *SU = SchedImpl->pickNode(IsTopNode)) {
#ifndef NDEBUG
// Enable break
if (NumInstrsScheduled == MISchedCutoff && MISchedCutoff != ~0U) {
CurrentTop = CurrentBottom;
break;
}
++NumInstrsScheduled;
#endif
DEBUG(dbgs() << "*** " << (IsTopNode ? "Top" : "Bottom")
<< " Scheduling Instruction:\n"; SU->dump(this));
if (!checkSchedLimit())
break;
// Move the instruction to its new location in the instruction stream.
MachineInstr *MI = SU->getInstr();