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      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
     65