Access the subtarget off of the MachineFunction via the DAG

scheduler or via the SelectionDAG if available. Otherwise
grab the subtarget off of the MachineFunction by going up
the parent chain.

llvm-svn: 219666

1 files changed, 7 insertions, 9 deletions

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index b140fc6d7e9..261942f534b 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -2363,15 +2363,14 @@ void GenericScheduler::initialize(ScheduleDAGMI *dag) {
   // Initialize the HazardRecognizers. If itineraries don't exist, are empty, or
   // are disabled, then these HazardRecs will be disabled.
   const InstrItineraryData *Itin = SchedModel->getInstrItineraries();
-  const TargetMachine &TM = DAG->MF.getTarget();
   if (!Top.HazardRec) {
     Top.HazardRec =
-        TM.getSubtargetImpl()->getInstrInfo()->CreateTargetMIHazardRecognizer(
+        DAG->MF.getSubtarget().getInstrInfo()->CreateTargetMIHazardRecognizer(
             Itin, DAG);
   }
   if (!Bot.HazardRec) {
     Bot.HazardRec =
-        TM.getSubtargetImpl()->getInstrInfo()->CreateTargetMIHazardRecognizer(
+        DAG->MF.getSubtarget().getInstrInfo()->CreateTargetMIHazardRecognizer(
             Itin, DAG);
   }
 }
@@ -2380,8 +2379,8 @@ void GenericScheduler::initialize(ScheduleDAGMI *dag) {
 void GenericScheduler::initPolicy(MachineBasicBlock::iterator Begin,
                                   MachineBasicBlock::iterator End,
                                   unsigned NumRegionInstrs) {
-  const TargetMachine &TM = Context->MF->getTarget();
-  const TargetLowering *TLI = TM.getSubtargetImpl()->getTargetLowering();
+  const MachineFunction &MF = *Begin->getParent()->getParent();
+  const TargetLowering *TLI = MF.getSubtarget().getTargetLowering();
 
   // Avoid setting up the register pressure tracker for small regions to save
   // compile time. As a rough heuristic, only track pressure when the number of
@@ -2401,8 +2400,8 @@ void GenericScheduler::initPolicy(MachineBasicBlock::iterator Begin,
   RegionPolicy.OnlyBottomUp = true;
 
   // Allow the subtarget to override default policy.
-  const TargetSubtargetInfo &ST = TM.getSubtarget<TargetSubtargetInfo>();
-  ST.overrideSchedPolicy(RegionPolicy, Begin, End, NumRegionInstrs);
+  MF.getSubtarget().overrideSchedPolicy(RegionPolicy, Begin, End,
+                                        NumRegionInstrs);
 
   // After subtarget overrides, apply command line options.
   if (!EnableRegPressure)
@@ -2898,10 +2897,9 @@ void PostGenericScheduler::initialize(ScheduleDAGMI *Dag) {
   // Initialize the HazardRecognizers. If itineraries don't exist, are empty,
   // or are disabled, then these HazardRecs will be disabled.
   const InstrItineraryData *Itin = SchedModel->getInstrItineraries();
-  const TargetMachine &TM = DAG->MF.getTarget();
   if (!Top.HazardRec) {
     Top.HazardRec =
-        TM.getSubtargetImpl()->getInstrInfo()->CreateTargetMIHazardRecognizer(
+        DAG->MF.getSubtarget().getInstrInfo()->CreateTargetMIHazardRecognizer(
             Itin, DAG);
   }
 }