Add const overload of findRegisterUseOperand

[arsenm]

ping

[hfinkel]

include/llvm/CodeGen/MachineInstr.h

909

Can you please put the line break after the -> so that for formatting is not so painful. Otherwise, LGTM. I assume you'll be using this somewhere soon.

[arsenm]

r247063

include/llvm/CodeGen/MachineInstr.h

public:
   /// Wrapper for findRegisterUseOperandIdx, it returns
   /// a pointer to the MachineOperand rather than an index.
   MachineOperand *findRegisterUseOperand(unsigned Reg, bool isKill = false,
                                       const TargetRegisterInfo *TRI = nullptr) {
     int Idx = findRegisterUseOperandIdx(Reg, isKill, TRI);
     return (Idx == -1) ? nullptr : &getOperand(Idx);
   }
 
+  const MachineOperand *findRegisterUseOperand(
+    unsigned Reg, bool isKill = false,
+    const TargetRegisterInfo *TRI = nullptr) const {
+    return const_cast<MachineInstr *>(this)->findRegisterUseOperand(Reg,
+                                                                    isKill,
+                                                                    TRI);
+  }
+
   /// Returns the operand index that is a def of the specified register or
   /// -1 if it is not found. If isDead is true, defs that are not dead are
   /// skipped. If Overlap is true, then it also looks for defs that merely
   /// overlap the specified register. If TargetRegisterInfo is non-null,
   /// then it also checks if there is a def of a super-register.
   /// This may also return a register mask operand when Overlap is true.
   int findRegisterDefOperandIdx(unsigned Reg,
                                 bool isDead = false, bool Overlap = false,