utils/TableGen/InstrInfoEmitter.h

   1 //===- InstrInfoEmitter.h - Generate a Instruction Set Desc. ----*- 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 // This tablegen backend is responsible for emitting a description of the target
  11 // instruction set for the code generator.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef INSTRINFO_EMITTER_H
  16 #define INSTRINFO_EMITTER_H
  17
  18 #include "TableGenBackend.h"
  19 #include "CodeGenDAGPatterns.h"
  20 #include <vector>
  21 #include <map>
  22
  23 namespace llvm {
  24
  25 class StringInit;
  26 class IntInit;
  27 class ListInit;
  28 class CodeGenInstruction;
  29
  30 class InstrInfoEmitter : public TableGenBackend {
  31   RecordKeeper &Records;
  32   CodeGenDAGPatterns CDP;
  33   std::map<std::string, unsigned> ItinClassMap;
  34
  35 public:
  36   InstrInfoEmitter(RecordKeeper &R) : Records(R), CDP(R) { }
  37
  38   // run - Output the instruction set description, returning true on failure.
  39   void run(raw_ostream &OS);
  40
  41 private:
  42   typedef std::map<std::vector<std::string>, unsigned> OperandInfoMapTy;
  43
  44   void emitRecord(const CodeGenInstruction &Inst, unsigned Num,
  45                   Record *InstrInfo,
  46                   std::map<std::vector<Record*>, unsigned> &EL,
  47                   std::map<Record*, unsigned> &BM,
  48                   const OperandInfoMapTy &OpInfo,
  49                   raw_ostream &OS);
  50   void emitShiftedValue(Record *R, StringInit *Val, IntInit *Shift,
  51                         raw_ostream &OS);
  52
  53   // Itinerary information.
  54   void GatherItinClasses();
  55   unsigned getItinClassNumber(const Record *InstRec);
  56
  57   // Operand information.
  58   void EmitOperandInfo(raw_ostream &OS, OperandInfoMapTy &OperandInfoIDs);
  59   std::vector<std::string> GetOperandInfo(const CodeGenInstruction &Inst);
  60
  61   void DetectRegisterClassBarriers(std::vector<Record*> &Defs,
  62                                    const std::vector<CodeGenRegisterClass> &RCs,
  63                                    std::vector<Record*> &Barriers);
  64 };
  65
  66 } // End llvm namespace
  67
  68 #endif