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 "TableGenBackend.h"
  18 #include "CodeGenDAGPatterns.h"
  19 #include <set>
  20
  21 namespace llvm {
  22
  23 /// DAGISelEmitter - The top-level class which coordinates construction
  24 /// and emission of the instruction selector.
  25 ///
  26 class DAGISelEmitter : public TableGenBackend {
  27   RecordKeeper &Records;
  28   CodeGenDAGPatterns CGP;
  29 public:
  30   explicit DAGISelEmitter(RecordKeeper &R) : Records(R), CGP(R) {}
  31
  32   // run - Output the isel, returning true on failure.
  33   void run(raw_ostream &OS);
  34 };
  35
  36 } // End llvm namespace
  37
  38 #endif