diff options
| -rw-r--r-- | lib/CodeGen/MachineScheduler.cpp | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp index 55e58969a0..fcb4375099 100644 --- a/lib/CodeGen/MachineScheduler.cpp +++ b/lib/CodeGen/MachineScheduler.cpp @@ -2171,37 +2171,6 @@ void ConvergingScheduler::tryCandidate(SchedCandidate &Cand, } } -/// pickNodeFromQueue helper that returns true if the LHS reg pressure effect is -/// more desirable than RHS from scheduling standpoint. -static bool compareRPDelta(const RegPressureDelta &LHS, - const RegPressureDelta &RHS) { - // Compare each component of pressure in decreasing order of importance - // without checking if any are valid. Invalid PressureElements are assumed to - // have UnitIncrease==0, so are neutral. - - // Avoid increasing the max critical pressure in the scheduled region. - if (LHS.Excess.UnitIncrease != RHS.Excess.UnitIncrease) { - DEBUG(dbgs() << " RP excess top - bot: " - << (LHS.Excess.UnitIncrease - RHS.Excess.UnitIncrease) << '\n'); - return LHS.Excess.UnitIncrease < RHS.Excess.UnitIncrease; - } - // Avoid increasing the max critical pressure in the scheduled region. - if (LHS.CriticalMax.UnitIncrease != RHS.CriticalMax.UnitIncrease) { - DEBUG(dbgs() << " RP critical top - bot: " - << (LHS.CriticalMax.UnitIncrease - RHS.CriticalMax.UnitIncrease) - << '\n'); - return LHS.CriticalMax.UnitIncrease < RHS.CriticalMax.UnitIncrease; - } - // Avoid increasing the max pressure of the entire region. - if (LHS.CurrentMax.UnitIncrease != RHS.CurrentMax.UnitIncrease) { - DEBUG(dbgs() << " RP current top - bot: " - << (LHS.CurrentMax.UnitIncrease - RHS.CurrentMax.UnitIncrease) - << '\n'); - return LHS.CurrentMax.UnitIncrease < RHS.CurrentMax.UnitIncrease; - } - return false; -} - #ifndef NDEBUG const char *ConvergingScheduler::getReasonStr( ConvergingScheduler::CandReason Reason) { @@ -2357,12 +2326,6 @@ SUnit *ConvergingScheduler::pickNodeBidirectional(bool &IsTopNode) { pickNodeFromQueue(Top, DAG->getTopRPTracker(), TopCand); assert(TopCand.Reason != NoCand && "failed to find the first candidate"); - // Check for a salient pressure difference and pick the best from either side. - if (compareRPDelta(TopCand.RPDelta, BotCand.RPDelta)) { - IsTopNode = true; - tracePick(TopCand, IsTopNode); - return TopCand.SU; - } // Choose the queue with the most important (lowest enum) reason. if (TopCand.Reason < BotCand.Reason) { IsTopNode = true; |