Const-ify several TargetInstrInfo methods.

llvm-svn: 57622
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.h b/llvm/lib/Target/ARM/ARMInstrInfo.h
index cd19ae1..c59b03c 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.h
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.h
@@ -198,20 +198,20 @@
   
   virtual MachineInstr* foldMemoryOperand(MachineFunction &MF,
                                           MachineInstr* MI,
-                                          SmallVectorImpl<unsigned> &Ops,
+                                          const SmallVectorImpl<unsigned> &Ops,
                                           int FrameIndex) const;
 
   virtual MachineInstr* foldMemoryOperand(MachineFunction &MF,
                                           MachineInstr* MI,
-                                          SmallVectorImpl<unsigned> &Ops,
+                                          const SmallVectorImpl<unsigned> &Ops,
                                           MachineInstr* LoadMI) const {
     return 0;
   }
 
-  virtual bool canFoldMemoryOperand(MachineInstr *MI,
-                                    SmallVectorImpl<unsigned> &Ops) const;
+  virtual bool canFoldMemoryOperand(const MachineInstr *MI,
+                                    const SmallVectorImpl<unsigned> &Ops) const;
   
-  virtual bool BlockHasNoFallThrough(MachineBasicBlock &MBB) const;
+  virtual bool BlockHasNoFallThrough(const MachineBasicBlock &MBB) const;
   virtual
   bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;