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40044ef4b0
llvm-svn: 31956
148 lines
4.9 KiB
C++
148 lines
4.9 KiB
C++
//===-- CodeGen/MachineInstBuilder.h - Simplify creation of MIs -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file exposes a function named BuildMI, which is useful for dramatically
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// simplifying how MachineInstr's are created. It allows use of code like this:
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//
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// M = BuildMI(X86::ADDrr8, 2).addReg(argVal1).addReg(argVal2);
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINEINSTRBUILDER_H
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#define LLVM_CODEGEN_MACHINEINSTRBUILDER_H
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/CodeGen/MachineFunction.h"
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namespace llvm {
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class TargetInstrDescriptor;
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class MachineInstrBuilder {
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MachineInstr *MI;
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public:
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MachineInstrBuilder(MachineInstr *mi) : MI(mi) {}
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/// Allow automatic conversion to the machine instruction we are working on.
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///
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operator MachineInstr*() const { return MI; }
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operator MachineBasicBlock::iterator() const { return MI; }
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/// addReg - Add a new virtual register operand...
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///
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const
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MachineInstrBuilder &addReg(int RegNo, bool isDef = false, bool isImp = false,
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bool isKill = false, bool isDead = false) const {
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MI->addRegOperand(RegNo, isDef, isImp);
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return *this;
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}
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/// addImm - Add a new immediate operand.
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///
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const MachineInstrBuilder &addImm(int64_t Val) const {
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MI->addImmOperand(Val);
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return *this;
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}
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const MachineInstrBuilder &addMBB(MachineBasicBlock *MBB) const {
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MI->addMachineBasicBlockOperand(MBB);
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return *this;
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}
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const MachineInstrBuilder &addFrameIndex(unsigned Idx) const {
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MI->addFrameIndexOperand(Idx);
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return *this;
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}
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const MachineInstrBuilder &addConstantPoolIndex(unsigned Idx,
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int Offset = 0) const {
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MI->addConstantPoolIndexOperand(Idx, Offset);
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return *this;
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}
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const MachineInstrBuilder &addJumpTableIndex(unsigned Idx) const {
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MI->addJumpTableIndexOperand(Idx);
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return *this;
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}
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const MachineInstrBuilder &addGlobalAddress(GlobalValue *GV,
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int Offset = 0) const {
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MI->addGlobalAddressOperand(GV, Offset);
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return *this;
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}
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const MachineInstrBuilder &addExternalSymbol(const char *FnName) const{
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MI->addExternalSymbolOperand(FnName);
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return *this;
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}
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};
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/// BuildMI - Builder interface. Specify how to create the initial instruction
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/// itself.
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///
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inline MachineInstrBuilder BuildMI(const TargetInstrDescriptor &TID) {
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return MachineInstrBuilder(new MachineInstr(TID));
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}
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/// BuildMI - This version of the builder sets up the first operand as a
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/// destination virtual register.
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///
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inline MachineInstrBuilder BuildMI(const TargetInstrDescriptor &TID,
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unsigned DestReg) {
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return MachineInstrBuilder(new MachineInstr(TID)).addReg(DestReg, true);
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}
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/// BuildMI - This version of the builder inserts the newly-built
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/// instruction before the given position in the given MachineBasicBlock, and
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/// sets up the first operand as a destination virtual register.
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///
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inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
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MachineBasicBlock::iterator I,
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const TargetInstrDescriptor &TID,
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unsigned DestReg) {
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MachineInstr *MI = new MachineInstr(TID);
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BB.insert(I, MI);
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return MachineInstrBuilder(MI).addReg(DestReg, true);
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}
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/// BuildMI - This version of the builder inserts the newly-built
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/// instruction before the given position in the given MachineBasicBlock, and
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/// does NOT take a destination register.
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///
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inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
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MachineBasicBlock::iterator I,
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const TargetInstrDescriptor &TID) {
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MachineInstr *MI = new MachineInstr(TID);
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BB.insert(I, MI);
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return MachineInstrBuilder(MI);
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}
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/// BuildMI - This version of the builder inserts the newly-built
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/// instruction at the end of the given MachineBasicBlock, and does NOT take a
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/// destination register.
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///
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inline MachineInstrBuilder BuildMI(MachineBasicBlock *BB,
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const TargetInstrDescriptor &TID) {
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return BuildMI(*BB, BB->end(), TID);
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}
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/// BuildMI - This version of the builder inserts the newly-built
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/// instruction at the end of the given MachineBasicBlock, and sets up the first
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/// operand as a destination virtual register.
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///
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inline MachineInstrBuilder BuildMI(MachineBasicBlock *BB,
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const TargetInstrDescriptor &TID,
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unsigned DestReg) {
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return BuildMI(*BB, BB->end(), TID, DestReg);
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}
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} // End llvm namespace
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#endif
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