utils/TableGen/FastISelEmitter.h

   1 //===- FastISelEmitter.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 "fast" instruction selector.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef FASTISEL_EMITTER_H
  15 #define FASTISEL_EMITTER_H
  16
  17 #include "TableGenBackend.h"
  18 #include "CodeGenDAGPatterns.h"
  19
  20 namespace llvm {
  21
  22 class CodeGenTarget;
  23
  24 /// FastISelEmitter - The top-level class which coordinates construction
  25 /// and emission of the instruction selector.
  26 ///
  27 class FastISelEmitter : public TableGenBackend {
  28   RecordKeeper &Records;
  29   CodeGenDAGPatterns CGP;
  30 public:
  31   explicit FastISelEmitter(RecordKeeper &R);
  32
  33   // run - Output the isel, returning true on failure.
  34   void run(std::ostream &OS);
  35 };
  36
  37 } // End llvm namespace
  38
  39 #endif