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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219666 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index b140fc6d7e987fd8d16f449ea6d762fe8362c732..261942f534be0166af1300a9776504533401484c 100644 (file)
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/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);
   }
 }