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//===-- CodeGen/MachineInstBuilder.h - Simplify creation of MIs -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file 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. It allows use of 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/MachineFunction.h"
namespace llvm {
class TargetInstrDesc;
namespace RegState {
enum {
Define = 0x2,
Implicit = 0x4,
Kill = 0x8,
Dead = 0x10,
Undef = 0x20,
EarlyClobber = 0x40,
ImplicitDefine = Implicit | Define,
ImplicitKill = Implicit | Kill
};
}
class MachineInstrBuilder {
MachineInstr *MI;
public:
MachineInstrBuilder() : MI(0) {}
explicit MachineInstrBuilder(MachineInstr *mi) : MI(mi) {}
/// Allow automatic conversion to the machine instruction we are working on.
///
operator MachineInstr*() const { return MI; }
operator MachineBasicBlock::iterator() const { return MI; }
/// addReg - Add a new virtual register operand...
///
const
MachineInstrBuilder &addReg(unsigned RegNo, unsigned flags = 0,
unsigned SubReg = 0) const {
assert((flags & 0x1) == 0 &&
"Passing in 'true' to addReg is forbidden! Use enums instead.");
MI->addOperand(MachineOperand::CreateReg(RegNo,
flags & RegState::Define,
flags & RegState::Implicit,
flags & RegState::Kill,
flags & RegState::Dead,
flags & RegState::Undef,
flags & RegState::EarlyClobber,
SubReg));
return *this;
}
/// addImm - Add a new immediate operand.
///
const MachineInstrBuilder &addImm(int64_t Val) const {
MI->addOperand(MachineOperand::CreateImm(Val));
return *this;
}
const MachineInstrBuilder &addFPImm(const ConstantFP *Val) const {
MI->addOperand(MachineOperand::CreateFPImm(Val));
return *this;
}
const MachineInstrBuilder &addMBB(MachineBasicBlock *MBB,
unsigned char TargetFlags = 0) const {
MI->addOperand(MachineOperand::CreateMBB(MBB, TargetFlags));
return *this;
}
const MachineInstrBuilder &addFrameIndex(unsigned Idx) const {
MI->addOperand(MachineOperand::CreateFI(Idx));
return *this;
}
const MachineInstrBuilder &addConstantPoolIndex(unsigned Idx,
int Offset = 0,
unsigned char TargetFlags = 0) const {
MI->addOperand(MachineOperand::CreateCPI(Idx, Offset, TargetFlags));
return *this;
}
const MachineInstrBuilder &addJumpTableIndex(unsigned Idx,
unsigned char TargetFlags = 0) const {
MI->addOperand(MachineOperand::CreateJTI(Idx, TargetFlags));
return *this;
}
const MachineInstrBuilder &addGlobalAddress(GlobalValue *GV,
int64_t Offset = 0,
unsigned char TargetFlags = 0) const {
MI->addOperand(MachineOperand::CreateGA(GV, Offset, TargetFlags));
return *this;
}
const MachineInstrBuilder &addMetadata(MDNode *N,
int64_t Offset = 0,
unsigned char TargetFlags = 0) const {
MI->addOperand(MachineOperand::CreateMDNode(N, Offset, TargetFlags));
return *this;
}
const MachineInstrBuilder &addExternalSymbol(const char *FnName,
unsigned char TargetFlags = 0) const {
MI->addOperand(MachineOperand::CreateES(FnName, TargetFlags));
return *this;
}
const MachineInstrBuilder &addMemOperand(MachineMemOperand *MMO) const {
MI->addMemOperand(*MI->getParent()->getParent(), MMO);
return *this;
}
const MachineInstrBuilder &addOperand(const MachineOperand &MO) const {
MI->addOperand(MO);
return *this;
}
};
/// BuildMI - Builder interface. Specify how to create the initial instruction
/// itself.
///
inline MachineInstrBuilder BuildMI(MachineFunction &MF,
DebugLoc DL,
const TargetInstrDesc &TID) {
return MachineInstrBuilder(MF.CreateMachineInstr(TID, DL));
}
/// BuildMI - This version of the builder sets up the first operand as a
/// destination virtual register.
///
inline MachineInstrBuilder BuildMI(MachineFunction &MF,
DebugLoc DL,
const TargetInstrDesc &TID,
unsigned DestReg) {
return MachineInstrBuilder(MF.CreateMachineInstr(TID, DL))
.addReg(DestReg, RegState::Define);
}
/// BuildMI - This version of the builder inserts the newly-built
/// instruction before the given position in the given MachineBasicBlock, and
/// sets up the first operand as a destination virtual register.
///
inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
MachineBasicBlock::iterator I,
DebugLoc DL,
const TargetInstrDesc &TID,
unsigned DestReg) {
MachineInstr *MI = BB.getParent()->CreateMachineInstr(TID, DL);
BB.insert(I, MI);
return MachineInstrBuilder(MI).addReg(DestReg, RegState::Define);
}
/// BuildMI - This version of the builder inserts the newly-built
/// instruction before the given position in the given MachineBasicBlock, and
/// does NOT take a destination register.
///
inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
MachineBasicBlock::iterator I,
DebugLoc DL,
const TargetInstrDesc &TID) {
MachineInstr *MI = BB.getParent()->CreateMachineInstr(TID, DL);
BB.insert(I, MI);
return MachineInstrBuilder(MI);
}
/// BuildMI - This version of the builder inserts the newly-built
/// instruction at the end of the given MachineBasicBlock, and does NOT take a
/// destination register.
///
inline MachineInstrBuilder BuildMI(MachineBasicBlock *BB,
DebugLoc DL,
const TargetInstrDesc &TID) {
return BuildMI(*BB, BB->end(), DL, TID);
}
/// BuildMI - This version of the builder inserts the newly-built
/// instruction at the end of the given MachineBasicBlock, and sets up the first
/// operand as a destination virtual register.
///
inline MachineInstrBuilder BuildMI(MachineBasicBlock *BB,
DebugLoc DL,
const TargetInstrDesc &TID,
unsigned DestReg) {
return BuildMI(*BB, BB->end(), DL, TID, DestReg);
}
inline unsigned getDefRegState(bool B) {
return B ? RegState::Define : 0;
}
inline unsigned getImplRegState(bool B) {
return B ? RegState::Implicit : 0;
}
inline unsigned getKillRegState(bool B) {
return B ? RegState::Kill : 0;
}
inline unsigned getDeadRegState(bool B) {
return B ? RegState::Dead : 0;
}
inline unsigned getUndefRegState(bool B) {
return B ? RegState::Undef : 0;
}
} // End llvm namespace
#endif
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