utils/TableGen/DAGISelEmitter.h

   1 //===- DAGISelEmitter.h - Generate an instruction selector ------*- 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 emits a DAG instruction selector.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef DAGISEL_EMITTER_H
  15 #define DAGISEL_EMITTER_H
  16
  17 #include "CodeGenDAGPatterns.h"
  18 #include <set>
  19
  20 namespace llvm {
  21
  22 /// DAGISelEmitter - The top-level class which coordinates construction
  23 /// and emission of the instruction selector.
  24 ///
  25 class DAGISelEmitter : public TableGenBackend {
  26   RecordKeeper &Records;
  27   CodeGenDAGPatterns CGP;
  28 public:
  29   DAGISelEmitter(RecordKeeper &R) : Records(R), CGP(R) {}
  30
  31   // run - Output the isel, returning true on failure.
  32   void run(std::ostream &OS);
  33
  34
  35 private:
  36   void EmitNodeTransforms(std::ostream &OS);
  37   void EmitPredicateFunctions(std::ostream &OS);
  38
  39   void GenerateCodeForPattern(const PatternToMatch &Pattern,
  40                   std::vector<std::pair<unsigned, std::string> > &GeneratedCode,
  41                               std::set<std::string> &GeneratedDecl,
  42                               std::vector<std::string> &TargetOpcodes,
  43                               std::vector<std::string> &TargetVTs);
  44   void EmitPatterns(std::vector<std::pair<const PatternToMatch*,
  45                   std::vector<std::pair<unsigned, std::string> > > > &Patterns,
  46                     unsigned Indent, std::ostream &OS);
  47
  48   void EmitInstructionSelector(std::ostream &OS);
  49 };
  50
  51 } // End llvm namespace
  52
  53 #endif