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misched: Use the same scheduling heuristics with -misched-topdown/bottomup.

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(except the part about choosing direction)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157437 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-05-24 23:11:17 +00:00
parent b1ebd6981f
commit 8ddd9d5b2b
1 changed files with 16 additions and 2 deletions
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18
lib/CodeGen/MachineScheduler.cpp
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@ -1168,11 +1168,25 @@ SUnit *ConvergingScheduler::pickNode(bool &IsTopNode) {
} }
SUnit *SU; SUnit *SU;
if (ForceTopDown) { if (ForceTopDown) {
SU = DAG->getSUnit(DAG->top()); SU = Top.pickOnlyChoice();
if (!SU) {
SchedCandidate TopCand;
CandResult TopResult =
pickNodeFromQueue(Top.Available, DAG->getTopRPTracker(), TopCand);
assert(TopResult != NoCand && "failed to find the first candidate");
SU = TopCand.SU;
}
IsTopNode = true; IsTopNode = true;
} }
else if (ForceBottomUp) { else if (ForceBottomUp) {
SU = DAG->getSUnit(priorNonDebug(DAG->bottom(), DAG->top())); SU = Bot.pickOnlyChoice();
if (!SU) {
SchedCandidate BotCand;
CandResult BotResult =
pickNodeFromQueue(Bot.Available, DAG->getBotRPTracker(), BotCand);
assert(BotResult != NoCand && "failed to find the first candidate");
SU = BotCand.SU;
}
IsTopNode = false; IsTopNode = false;
} }
else { else {