- More refactoring. This gets rid of all of the getOpcode calls.

- This change also makes it possible to switch between ARM / Thumb on a
  per-function basis.
- Fixed thumb2 routine which expand reg + arbitrary immediate. It was using
  using ARM so_imm logic.
- Use movw and movt to do reg + imm when profitable.
- Other code clean ups and minor optimizations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77300 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMInstrInfo.h

@@ -32,9 +32,6 @@ public:
   // if there is not such an opcode.
   unsigned getUnindexedOpcode(unsigned Opc) const;
 
-  // Return the opcode that implements 'Op', or 0 if no opcode
-  unsigned getOpcode(ARMII::Op Op) const;
-
   // Return true if the block does not fall through.
   bool BlockHasNoFallThrough(const MachineBasicBlock &MBB) const;