llvm-6502/include/llvm/CodeGen/MachineInstrBuilder.h
2003-10-20 20:19:47 +00:00

166 lines
5.6 KiB
C++

//===-- CodeGen/MachineInstBuilder.h - Simplify creation of MIs -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file exposes a function named BuildMI, which is useful for dramatically
// simplifying how MachineInstr's are created. Instead of using code like this:
//
// M = new MachineInstr(X86::ADDrr32);
// M->SetMachineOperandVal(0, MachineOperand::MO_VirtualRegister, argVal1);
// M->SetMachineOperandVal(1, MachineOperand::MO_VirtualRegister, argVal2);
//
// we can now use code like this:
//
// M = BuildMI(X86::ADDrr8, 2).addReg(argVal1).addReg(argVal2);
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEINSTRBUILDER_H
#define LLVM_CODEGEN_MACHINEINSTRBUILDER_H
#include "llvm/CodeGen/MachineInstr.h"
class MachineInstrBuilder {
MachineInstr *MI;
public:
MachineInstrBuilder(MachineInstr *mi) : MI(mi) {}
/// Allow automatic conversion to the machine instruction we are working on.
///
operator MachineInstr*() const { return MI; }
/// addReg - Add a new virtual register operand...
///
const MachineInstrBuilder &addReg(int RegNo,
MOTy::UseType Ty = MOTy::Use) const {
MI->addRegOperand(RegNo, Ty);
return *this;
}
/// addReg - Add an LLVM value that is to be used as a register...
///
const MachineInstrBuilder &addReg(Value *V,
MOTy::UseType Ty = MOTy::Use) const {
MI->addRegOperand(V, Ty);
return *this;
}
/// addReg - Add an LLVM value that is to be used as a register...
///
const MachineInstrBuilder &addCCReg(Value *V,
MOTy::UseType Ty = MOTy::Use) const {
MI->addCCRegOperand(V, Ty);
return *this;
}
/// addRegDef - Add an LLVM value that is to be defined as a register... this
/// is the same as addReg(V, MOTy::Def).
///
const MachineInstrBuilder &addRegDef(Value *V) const {
return addReg(V, MOTy::Def);
}
/// addPCDisp - Add an LLVM value to be treated as a PC relative
/// displacement...
///
const MachineInstrBuilder &addPCDisp(Value *V) const {
MI->addPCDispOperand(V);
return *this;
}
/// addMReg - Add a machine register operand...
///
const MachineInstrBuilder &addMReg(int Reg,
MOTy::UseType Ty = MOTy::Use) const {
MI->addMachineRegOperand(Reg, Ty);
return *this;
}
/// addSImm - Add a new sign extended immediate operand...
///
const MachineInstrBuilder &addSImm(int64_t val) const {
MI->addSignExtImmOperand(val);
return *this;
}
/// addZImm - Add a new zero extended immediate operand...
///
const MachineInstrBuilder &addZImm(int64_t Val) const {
MI->addZeroExtImmOperand(Val);
return *this;
}
const MachineInstrBuilder &addMBB(MachineBasicBlock *MBB) const {
MI->addMachineBasicBlockOperand(MBB);
return *this;
}
const MachineInstrBuilder &addFrameIndex(unsigned Idx) const {
MI->addFrameIndexOperand(Idx);
return *this;
}
const MachineInstrBuilder &addConstantPoolIndex(unsigned Idx) const {
MI->addConstantPoolIndexOperand(Idx);
return *this;
}
const MachineInstrBuilder &addGlobalAddress(GlobalValue *GV,
bool isPCRelative = false) const {
MI->addGlobalAddressOperand(GV, isPCRelative);
return *this;
}
const MachineInstrBuilder &addExternalSymbol(const std::string &Name,
bool isPCRelative = false) const{
MI->addExternalSymbolOperand(Name, isPCRelative);
return *this;
}
};
/// BuildMI - Builder interface. Specify how to create the initial instruction
/// itself. NumOperands is the number of operands to the machine instruction to
/// allow for memory efficient representation of machine instructions.
///
inline MachineInstrBuilder BuildMI(int Opcode, unsigned NumOperands) {
return MachineInstrBuilder(new MachineInstr(Opcode, NumOperands, true, true));
}
/// BuildMI - This version of the builder also sets up the first "operand" as a
/// destination virtual register. NumOperands is the number of additional add*
/// calls that are expected, it does not include the destination register.
///
inline MachineInstrBuilder BuildMI(int Opcode, unsigned NumOperands,
unsigned DestReg) {
return MachineInstrBuilder(new MachineInstr(Opcode, NumOperands+1,
true, true)).addReg(DestReg, MOTy::Def);
}
/// BuildMI - This version of the builder inserts the built MachineInstr into
/// the specified MachineBasicBlock.
///
inline MachineInstrBuilder BuildMI(MachineBasicBlock *BB, int Opcode,
unsigned NumOperands) {
return MachineInstrBuilder(new MachineInstr(BB, Opcode, NumOperands));
}
/// BuildMI - This version of the builder inserts the built MachineInstr into
/// the specified MachineBasicBlock, and also sets up the first "operand" as a
/// destination virtual register. NumOperands is the number of additional add*
/// calls that are expected, it does not include the destination register.
///
inline MachineInstrBuilder BuildMI(MachineBasicBlock *BB, int Opcode,
unsigned NumOperands, unsigned DestReg) {
return MachineInstrBuilder(new MachineInstr(BB, Opcode,
NumOperands+1)).addReg(DestReg,
MOTy::Def);
}
#endif