Replace some uses of getSubtargetImpl with the cached version
off of the MachineFunction or with the version that takes a
Function reference as an argument.

llvm-svn: 227185
diff --git a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
index e218a83..1bbe6e1 100644
--- a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1515,9 +1515,9 @@
   MF = &Func;
   const TargetMachine &TM = MF->getTarget();
   MRI = &MF->getRegInfo();
-  TII = TM.getSubtargetImpl()->getInstrInfo();
-  TRI = TM.getSubtargetImpl()->getRegisterInfo();
-  InstrItins = TM.getSubtargetImpl()->getInstrItineraryData();
+  TII = MF->getSubtarget().getInstrInfo();
+  TRI = MF->getSubtarget().getRegisterInfo();
+  InstrItins = MF->getSubtarget().getInstrItineraryData();
   LV = getAnalysisIfAvailable<LiveVariables>();
   LIS = getAnalysisIfAvailable<LiveIntervals>();
   AA = &getAnalysis<AliasAnalysis>();