1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
| //===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This class represents the Parser for tablegen files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TABLEGEN_TGPARSER_H
#define LLVM_LIB_TABLEGEN_TGPARSER_H
#include "TGLexer.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include <map>
namespace llvm {
class Record;
class RecordVal;
class RecordKeeper;
class RecTy;
class Init;
struct ForeachLoop;
struct MultiClass;
struct SubClassReference;
struct SubMultiClassReference;
struct LetRecord {
StringInit *Name;
std::vector<unsigned> Bits;
Init *Value;
SMLoc Loc;
LetRecord(StringInit *N, ArrayRef<unsigned> B, Init *V, SMLoc L)
: Name(N), Bits(B), Value(V), Loc(L) {
}
};
/// RecordsEntry - Can be either a record or a foreach loop.
struct RecordsEntry {
std::unique_ptr<Record> Rec;
std::unique_ptr<ForeachLoop> Loop;
void dump() const;
RecordsEntry() {}
RecordsEntry(std::unique_ptr<Record> Rec) : Rec(std::move(Rec)) {}
RecordsEntry(std::unique_ptr<ForeachLoop> Loop)
: Loop(std::move(Loop)) {}
};
/// ForeachLoop - Record the iteration state associated with a for loop.
/// This is used to instantiate items in the loop body.
struct ForeachLoop {
SMLoc Loc;
VarInit *IterVar;
Init *ListValue;
std::vector<RecordsEntry> Entries;
void dump() const;
ForeachLoop(SMLoc Loc, VarInit *IVar, Init *LValue)
: Loc(Loc), IterVar(IVar), ListValue(LValue) {}
};
struct DefsetRecord {
SMLoc Loc;
RecTy *EltTy;
SmallVector<Init *, 16> Elements;
};
struct MultiClass {
Record Rec; // Placeholder for template args and Name.
std::vector<RecordsEntry> Entries;
void dump() const;
MultiClass(StringRef Name, SMLoc Loc, RecordKeeper &Records) :
Rec(Name, Loc, Records) {}
};
class TGParser {
TGLexer Lex;
std::vector<SmallVector<LetRecord, 4>> LetStack;
std::map<std::string, std::unique_ptr<MultiClass>> MultiClasses;
/// Loops - Keep track of any foreach loops we are within.
///
std::vector<std::unique_ptr<ForeachLoop>> Loops;
SmallVector<DefsetRecord *, 2> Defsets;
/// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
/// current value.
MultiClass *CurMultiClass;
// Record tracker
RecordKeeper &Records;
// A "named boolean" indicating how to parse identifiers. Usually
// identifiers map to some existing object but in special cases
// (e.g. parsing def names) no such object exists yet because we are
// in the middle of creating in. For those situations, allow the
// parser to ignore missing object errors.
enum IDParseMode {
ParseValueMode, // We are parsing a value we expect to look up.
ParseNameMode, // We are parsing a name of an object that does not yet
// exist.
};
public:
TGParser(SourceMgr &SrcMgr, ArrayRef<std::string> Macros,
RecordKeeper &records)
: Lex(SrcMgr, Macros), CurMultiClass(nullptr), Records(records) {}
/// ParseFile - Main entrypoint for parsing a tblgen file. These parser
/// routines return true on error, or false on success.
bool ParseFile();
bool Error(SMLoc L, const Twine &Msg) const {
PrintError(L, Msg);
return true;
}
bool TokError(const Twine &Msg) const {
return Error(Lex.getLoc(), Msg);
}
const TGLexer::DependenciesMapTy &getDependencies() const {
return Lex.getDependencies();
}
private: // Semantic analysis methods.
bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
bool SetValue(Record *TheRec, SMLoc Loc, Init *ValName,
ArrayRef<unsigned> BitList, Init *V,
bool AllowSelfAssignment = false);
bool AddSubClass(Record *Rec, SubClassReference &SubClass);
bool AddSubClass(RecordsEntry &Entry, SubClassReference &SubClass);
bool AddSubMultiClass(MultiClass *CurMC,
SubMultiClassReference &SubMultiClass);
using SubstStack = SmallVector<std::pair<Init *, Init *>, 8>;
bool addEntry(RecordsEntry E);
bool resolve(const ForeachLoop &Loop, SubstStack &Stack, bool Final,
std::vector<RecordsEntry> *Dest, SMLoc *Loc = nullptr);
bool resolve(const std::vector<RecordsEntry> &Source, SubstStack &Substs,
bool Final, std::vector<RecordsEntry> *Dest,
SMLoc *Loc = nullptr);
bool addDefOne(std::unique_ptr<Record> Rec);
private: // Parser methods.
bool ParseObjectList(MultiClass *MC = nullptr);
bool ParseObject(MultiClass *MC);
bool ParseClass();
bool ParseMultiClass();
bool ParseDefm(MultiClass *CurMultiClass);
bool ParseDef(MultiClass *CurMultiClass);
bool ParseDefset();
bool ParseForeach(MultiClass *CurMultiClass);
bool ParseTopLevelLet(MultiClass *CurMultiClass);
void ParseLetList(SmallVectorImpl<LetRecord> &Result);
bool ParseObjectBody(Record *CurRec);
bool ParseBody(Record *CurRec);
bool ParseBodyItem(Record *CurRec);
bool ParseTemplateArgList(Record *CurRec);
Init *ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
VarInit *ParseForeachDeclaration(Init *&ForeachListValue);
SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
Init *ParseIDValue(Record *CurRec, StringInit *Name, SMLoc NameLoc,
IDParseMode Mode = ParseValueMode);
Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = nullptr,
IDParseMode Mode = ParseValueMode);
Init *ParseValue(Record *CurRec, RecTy *ItemType = nullptr,
IDParseMode Mode = ParseValueMode);
void ParseValueList(SmallVectorImpl<llvm::Init*> &Result, Record *CurRec,
Record *ArgsRec = nullptr, RecTy *EltTy = nullptr);
void ParseDagArgList(
SmallVectorImpl<std::pair<llvm::Init*, StringInit*>> &Result,
Record *CurRec);
bool ParseOptionalRangeList(SmallVectorImpl<unsigned> &Ranges);
bool ParseOptionalBitList(SmallVectorImpl<unsigned> &Ranges);
void ParseRangeList(SmallVectorImpl<unsigned> &Result);
bool ParseRangePiece(SmallVectorImpl<unsigned> &Ranges,
TypedInit *FirstItem = nullptr);
RecTy *ParseType();
Init *ParseOperation(Record *CurRec, RecTy *ItemType);
Init *ParseOperationCond(Record *CurRec, RecTy *ItemType);
RecTy *ParseOperatorType();
Init *ParseObjectName(MultiClass *CurMultiClass);
Record *ParseClassID();
MultiClass *ParseMultiClassID();
bool ApplyLetStack(Record *CurRec);
bool ApplyLetStack(RecordsEntry &Entry);
};
} // end namespace llvm
#endif
|