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//===-- CodeGen/MachineInstBuilder.h - Simplify creation of MIs -*- C++ -*-===//
//
// 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).addReg(argVal1).addReg(argVal2);
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEINSTRBUILDER_H
#define LLVM_CODEGEN_MACHINEINSTRBUILDER_H
#include "llvm/CodeGen/MachineInstr.h"
struct MachineInstrBuilder {
MachineInstr *MI;
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 register operand...
///
MachineInstrBuilder &addReg(int RegNo) {
MI->addRegOperand(RegNo);
return *this;
}
MachineInstrBuilder &addReg(Value *V, bool isDef = false, bool isDNU = false){
MI->addRegOperand(V, isDef, isDNU);
return *this;
}
MachineInstrBuilder &addPCDisp(Value *V) {
MI->addPCDispOperand(V);
return *this;
}
MachineInstrBuilder &addMReg(int Reg, bool isDef=false) {
MI->addMachineRegOperand(Reg, isDef);
return *this;
}
/// addSImm - Add a new sign extended immediate operand...
///
MachineInstrBuilder &addSImm(int64_t val) {
MI->addSignExtImmOperand(val);
return *this;
}
/// addZImm - Add a new zero extended immediate operand...
///
MachineInstrBuilder &addZImm(int64_t Val) {
MI->addZeroExtImmOperand(Val);
return *this;
}
};
/// BuildMI - Builder interface. Specify how to create the initial instruction
/// itself.
///
inline MachineInstrBuilder BuildMI(MachineOpCode Opcode, unsigned NumOperands) {
return MachineInstrBuilder(new MachineInstr(Opcode, NumOperands, true, true));
}
#if 0
inline MachineInstrBuilder BuildMI(MBasicBlock *BB, MachineOpCode Opcode,
unsigned DestReg = 0) {
return MachineInstrBuilder(new MachineInstr(BB, Opcode, DestReg));
}
#endif
#endif
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