1 //===-- llvm/MC/MCInst.h - MCInst class -------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declaration of the MCInst and MCOperand classes, which
11 // is the basic representation used to represent low-level machine code
14 //===----------------------------------------------------------------------===//
17 #ifndef LLVM_MC_MCINST_H
18 #define LLVM_MC_MCINST_H
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/Support/DataTypes.h"
22 #include "llvm/Support/DebugLoc.h"
26 /// MCOperand - Instances of this class represent operands of the MCInst class.
27 /// This is a simple discriminated union.
29 enum MachineOperandType {
30 kInvalid, ///< Uninitialized.
31 kRegister, ///< Register operand.
32 kImmediate, ///< Immediate operand.
33 kMBBLabel ///< Basic block label.
47 MCOperand() : Kind(kInvalid) {}
48 MCOperand(const MCOperand &RHS) { *this = RHS; }
50 bool isReg() const { return Kind == kRegister; }
51 bool isImm() const { return Kind == kImmediate; }
52 bool isMBBLabel() const { return Kind == kMBBLabel; }
54 /// getReg - Returns the register number.
55 unsigned getReg() const {
56 assert(isReg() && "This is not a register operand!");
60 /// setReg - Set the register number.
61 void setReg(unsigned Reg) {
62 assert(isReg() && "This is not a register operand!");
66 int64_t getImm() const {
67 assert(isImm() && "This is not an immediate");
70 void setImm(int64_t Val) {
71 assert(isImm() && "This is not an immediate");
75 unsigned getMBBLabelFunction() const {
76 assert(isMBBLabel() && "Wrong accessor");
77 return MBBLabel.FunctionNo;
79 unsigned getMBBLabelBlock() const {
80 assert(isMBBLabel() && "Wrong accessor");
81 return MBBLabel.BlockNo;
84 void MakeReg(unsigned Reg) {
88 void MakeImm(int64_t Val) {
92 void MakeMBBLabel(unsigned Fn, unsigned MBB) {
94 MBBLabel.FunctionNo = Fn;
95 MBBLabel.BlockNo = MBB;
100 /// MCInst - Instances of this class represent a single low-level machine
104 SmallVector<MCOperand, 8> Operands;
106 MCInst() : Opcode(~0U) {}
108 void setOpcode(unsigned Op) { Opcode = Op; }
110 unsigned getOpcode() const { return Opcode; }
111 DebugLoc getDebugLoc() const { return DebugLoc(); }
113 const MCOperand &getOperand(unsigned i) const { return Operands[i]; }
114 MCOperand &getOperand(unsigned i) { return Operands[i]; }
115 unsigned getNumOperands() const { return Operands.size(); }
117 void addOperand(const MCOperand &Op) {
118 Operands.push_back(Op);
124 } // end namespace llvm