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
21namespace 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
64