fixup! MachineScheduler: Introduce MachineSchedStrategy::isAvailableNode() hook

Author: gbossu

llvm/include/llvm/CodeGen/MachineScheduler.h

@@ -300,7 +300,7 @@ class MachineSchedStrategy {
   /// overridden by schedulers that try to release successors/predecessors early
   /// to schedule "out of order".
   virtual bool isAvailableNode(SUnit &SU, SchedBoundary &Zone,
-                               bool VerifyReadyCycle) const;
+                               bool VerifyReadyCycle);
 
   /// Scheduler callback to notify that a new subtree is scheduled.
   virtual void scheduleTree(unsigned SubtreeID) {}
@@ -918,7 +918,7 @@ class SchedBoundary {
   };
 
   ScheduleDAGMI *DAG = nullptr;
-  const MachineSchedStrategy *SchedImpl = nullptr;
+  MachineSchedStrategy *SchedImpl = nullptr;
   const TargetSchedModel *SchedModel = nullptr;
   SchedRemainder *Rem = nullptr;
 
@@ -1030,7 +1030,7 @@ class SchedBoundary {
 
   void reset();
 
-  void init(ScheduleDAGMI *DAG, const MachineSchedStrategy *SchedImpl,
+  void init(ScheduleDAGMI *DAG, MachineSchedStrategy *SchedImpl,
             const TargetSchedModel *SModel, SchedRemainder *Rem);
 
   bool isTop() const {

llvm/lib/CodeGen/MachineScheduler.cpp

@@ -2316,8 +2316,7 @@ init(ScheduleDAGMI *DAG, const TargetSchedModel *SchedModel) {
   }
 }
 
-void SchedBoundary::init(ScheduleDAGMI *DAG,
-                         const MachineSchedStrategy *SchedImpl,
+void SchedBoundary::init(ScheduleDAGMI *DAG, MachineSchedStrategy *SchedImpl,
                          const TargetSchedModel *SModel, SchedRemainder *Rem) {
   reset();
   this->DAG = DAG;
@@ -2989,7 +2988,7 @@ LLVM_DUMP_METHOD void SchedBoundary::dumpScheduledState() const {
 //===----------------------------------------------------------------------===//
 
 bool MachineSchedStrategy::isAvailableNode(SUnit &SU, SchedBoundary &Zone,
-                                           bool VerifyReadyCycle) const {
+                                           bool VerifyReadyCycle) {
   unsigned ReadyCycle = Zone.isTop() ? SU.TopReadyCycle : SU.BotReadyCycle;
   if (VerifyReadyCycle && ReadyCycle > Zone.getCurrCycle())
     return false;