llvm/utils/TableGen/CodeGenHwModes.h

   1 //===--- CodeGenHwModes.h ---------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 // Classes to parse and store HW mode information for instruction selection.
   9 //===----------------------------------------------------------------------===//
  10
  11 #ifndef LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H
  12 #define LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H
  13
  14 #include "llvm/ADT/DenseMap.h"
  15 #include "llvm/ADT/StringRef.h"
  16 #include <cassert>
  17 #include <map>
  18 #include <string>
  19 #include <utility>
  20 #include <vector>
  21
  22 // HwModeId -> list of predicates (definition)
  23
  24 namespace llvm {
  25   class Record;
  26   class RecordKeeper;
  27
  28   struct CodeGenHwModes;
  29
  30   struct HwMode {
  31     HwMode(Record *R);
  32     StringRef Name;
  33     std::string Features;
  34     std::string Predicates;
  35     void dump() const;
  36   };
  37
  38   struct HwModeSelect {
  39     HwModeSelect(Record *R, CodeGenHwModes &CGH);
  40     typedef std::pair<unsigned, Record*> PairType;
  41     std::vector<PairType> Items;
  42     void dump() const;
  43   };
  44
  45   struct CodeGenHwModes {
  46     enum : unsigned { DefaultMode = 0 };
  47     static StringRef DefaultModeName;
  48
  49     CodeGenHwModes(RecordKeeper &R);
  50     unsigned getHwModeId(Record *R) const;
  51     const HwMode &getMode(unsigned Id) const {
  52       assert(Id != 0 && "Mode id of 0 is reserved for the default mode");
  53       return Modes[Id-1];
  54     }
  55     const HwModeSelect &getHwModeSelect(Record *R) const;
  56     unsigned getNumModeIds() const { return Modes.size()+1; }
  57     void dump() const;
  58
  59   private:
  60     RecordKeeper &Records;
  61     DenseMap<Record *, unsigned> ModeIds;  // HwMode Record -> HwModeId
  62     std::vector<HwMode> Modes;
  63     std::map<Record*,HwModeSelect> ModeSelects;
  64   };
  65 }
  66
  67 #endif // LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H