llvm-6502/utils/TableGen/InstrInfoEmitter.h
Chris Lattner 2d51a4ce8f remove some old hacky code that tried to infer whether a store
occured in a pattern, but failed miserably.  The new code works for
any instruction that has a store in its pattern, including all the 
x86 mem op mem instructions.

The only target-independent code that uses this is branch folding,
so this won't change anything in practice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45648 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-06 02:16:26 +00:00

68 lines
2.0 KiB
C++

//===- 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 &isStore, bool &isLoad, bool &NeverHasSideEffects);
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