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