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/StringMap.h"
  15 #include <cassert>
  16 #include <map>
  17 #include <string>
  18 #include <vector>
  19
  20 // HwModeId -> list of predicates (definition)
  21
  22 namespace llvm {
  23   class Record;
  24   class RecordKeeper;
  25
  26   struct CodeGenHwModes;
  27
  28   struct HwMode {
  29     HwMode(Record *R);
  30     StringRef Name;
  31     std::string Features;
  32     void dump() const;
  33   };
  34
  35   struct HwModeSelect {
  36     HwModeSelect(Record *R, CodeGenHwModes &CGH);
  37     typedef std::pair<unsigned, Record*> PairType;
  38     std::vector<PairType> Items;
  39     void dump() const;
  40   };
  41
  42   struct CodeGenHwModes {
  43     enum : unsigned { DefaultMode = 0 };
  44     static StringRef DefaultModeName;
  45
  46     CodeGenHwModes(RecordKeeper &R);
  47     unsigned getHwModeId(StringRef Name) const;
  48     const HwMode &getMode(unsigned Id) const {
  49       assert(Id != 0 && "Mode id of 0 is reserved for the default mode");
  50       return Modes[Id-1];
  51     }
  52     const HwModeSelect &getHwModeSelect(Record *R) const;
  53     unsigned getNumModeIds() const { return Modes.size()+1; }
  54     void dump() const;
  55
  56   private:
  57     RecordKeeper &Records;
  58     StringMap<unsigned> ModeIds;  // HwMode (string) -> HwModeId
  59     std::vector<HwMode> Modes;
  60     std::map<Record*,HwModeSelect> ModeSelects;
  61   };
  62 }
  63
  64 #endif // LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H