utils/TableGen/CodeEmitterGen.h

   1 //===- CodeEmitterGen.h - Code Emitter Generator ----------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // FIXME: document
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef CODEMITTERGEN_H
  15 #define CODEMITTERGEN_H
  16
  17 #include "TableGenBackend.h"
  18 #include <vector>
  19 #include <string>
  20
  21 namespace llvm {
  22
  23 class RecordVal;
  24 class BitsInit;
  25 class CodeGenTarget;
  26
  27 class CodeEmitterGen : public TableGenBackend {
  28   RecordKeeper &Records;
  29 public:
  30   CodeEmitterGen(RecordKeeper &R) : Records(R) {}
  31
  32   // run - Output the code emitter
  33   void run(raw_ostream &o);
  34 private:
  35   void emitMachineOpEmitter(raw_ostream &o, const std::string &Namespace);
  36   void emitGetValueBit(raw_ostream &o, const std::string &Namespace);
  37   void reverseBits(std::vector<Record*> &Insts);
  38   int getVariableBit(const std::string &VarName, BitsInit *BI, int bit);
  39   std::string getInstructionCase(Record *R, CodeGenTarget &Target);
  40   void
  41   AddCodeToMergeInOperand(Record *R, BitsInit *BI, const std::string &VarName,
  42                           unsigned &NumberedOp,
  43                           std::string &Case, CodeGenTarget &Target);
  44
  45 };
  46
  47 } // End llvm namespace
  48
  49 #endif