Rewrite uses in AM/PPC targets

Created using spr 1.3.6-beta.1

Author: wangpc-pp

llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp

@@ -6936,7 +6936,6 @@ bool ARMPipelinerLoopInfo::tooMuchRegisterPressure(SwingSchedulerDAG &SSD,
   RegClassInfo.runOnMachineFunction(*MF);
   RPTracker.init(MF, &RegClassInfo, nullptr, EndLoop->getParent(),
                  EndLoop->getParent()->end(), false, false);
-  const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
 
   bumpCrossIterationPressure(RPTracker, CrossIterationNeeds);
 
@@ -6979,7 +6978,7 @@ bool ARMPipelinerLoopInfo::tooMuchRegisterPressure(SwingSchedulerDAG &SSD,
 
   auto &P = RPTracker.getPressure().MaxSetPressure;
   for (unsigned I = 0, E = P.size(); I < E; ++I)
-    if (P[I] > TRI->getRegPressureSetLimit(*MF, I)) {
+    if (P[I] > RegClassInfo.getRegPressureSetLimit(I)) {
       return true;
     }
   return false;

llvm/lib/Target/PowerPC/PPCInstrInfo.cpp

@@ -643,8 +643,8 @@ bool PPCInstrInfo::shouldReduceRegisterPressure(
   };
 
   // For now we only care about float and double type fma.
-  unsigned VSSRCLimit = TRI->getRegPressureSetLimit(
-      *MBB->getParent(), PPC::RegisterPressureSets::VSSRC);
+  unsigned VSSRCLimit =
+      RegClassInfo->getRegPressureSetLimit(PPC::RegisterPressureSets::VSSRC);
 
   // Only reduce register pressure when pressure is high.
   return GetMBBPressure(MBB)[PPC::RegisterPressureSets::VSSRC] >