diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineScheduler.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineScheduler.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp index dbb2f3f..b6d0d9a 100644 --- a/llvm/lib/CodeGen/MachineScheduler.cpp +++ b/llvm/lib/CodeGen/MachineScheduler.cpp @@ -680,7 +680,7 @@ void ScheduleDAGMI::releasePred(SUnit *SU, SDep *PredEdge) { PredSU->BotReadyCycle = SU->BotReadyCycle + PredEdge->getLatency(); --PredSU->NumSuccsLeft; - if (PredSU->NumSuccsLeft == 0) + if (PredSU->NumSuccsLeft == 0 && PredSU != &EntrySU) SchedImpl->releaseBottomNode(PredSU); } @@ -853,7 +853,7 @@ void ScheduleDAGMI::initQueues(ArrayRef<SUnit*> TopRoots, NextClusterSucc = nullptr; NextClusterPred = nullptr; - // Release all DAG roots for scheduling, not including ExitSU. + // Release all DAG roots for scheduling, not including EntrySU/ExitSU. // // Nodes with unreleased weak edges can still be roots. // Release top roots in forward order. @@ -867,6 +867,7 @@ void ScheduleDAGMI::initQueues(ArrayRef<SUnit*> TopRoots, SchedImpl->releaseBottomNode(*I); } + releaseSuccessors(&EntrySU); releasePredecessors(&ExitSU); SchedImpl->registerRoots(); @@ -1167,6 +1168,8 @@ void ScheduleDAGMILive::updatePressureDiffs( void ScheduleDAGMILive::dump() const { #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) + if (EntrySU.getInstr() != nullptr) + dumpNodeAll(EntrySU); for (const SUnit &SU : SUnits) { dumpNodeAll(SU); if (ShouldTrackPressure) { |