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//===- InstrInfoEmitter.h - Generate a Instruction Set Desc. ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend is responsible for emitting a description of the target
// instruction set for the code generator.
//
//===----------------------------------------------------------------------===//
#ifndef INSTRINFO_EMITTER_H
#define INSTRINFO_EMITTER_H
#include "TableGenBackend.h"
#include "CodeGenDAGPatterns.h"
#include <vector>
#include <map>
namespace llvm {
class StringInit;
class IntInit;
class ListInit;
class CodeGenInstruction;
class InstrInfoEmitter : public TableGenBackend {
RecordKeeper &Records;
const CodeGenDAGPatterns CDP;
std::map<std::string, unsigned> ItinClassMap;
public:
InstrInfoEmitter(RecordKeeper &R) : Records(R), CDP(R) { }
// run - Output the instruction set description, returning true on failure.
void run(std::ostream &OS);
private:
typedef std::map<std::vector<std::string>, unsigned> OperandInfoMapTy;
// Instruction analysis.
void InferFromPattern(const CodeGenInstruction &Inst,
bool &MayStore, bool &MayLoad, bool &HasSideEffects);
void emitRecord(const CodeGenInstruction &Inst, unsigned Num,
Record *InstrInfo,
std::map<std::vector<Record*>, unsigned> &EL,
const OperandInfoMapTy &OpInfo,
std::ostream &OS);
void emitShiftedValue(Record *R, StringInit *Val, IntInit *Shift,
std::ostream &OS);
// Itinerary information.
void GatherItinClasses();
unsigned getItinClassNumber(const Record *InstRec);
// Operand information.
void EmitOperandInfo(std::ostream &OS, OperandInfoMapTy &OperandInfoIDs);
std::vector<std::string> GetOperandInfo(const CodeGenInstruction &Inst);
};
} // End llvm namespace
#endif
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