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;
getModeCodeGenHwModes48     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;
getNumModeIdsCodeGenHwModes53     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