1 //===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class represents the Parser for tablegen files.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TABLEGEN_TGPARSER_H
15 #define LLVM_LIB_TABLEGEN_TGPARSER_H
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/Support/SourceMgr.h"
20 #include "llvm/TableGen/Error.h"
21 #include "llvm/TableGen/Record.h"
32 struct SubClassReference;
33 struct SubMultiClassReference;
37 std::vector<unsigned> Bits;
40 LetRecord(StringInit *N, ArrayRef<unsigned> B, Init *V, SMLoc L)
41 : Name(N), Bits(B), Value(V), Loc(L) {
45 /// RecordsEntry - Can be either a record or a foreach loop.
47 std::unique_ptr<Record> Rec;
48 std::unique_ptr<ForeachLoop> Loop;
53 RecordsEntry(std::unique_ptr<Record> Rec) : Rec(std::move(Rec)) {}
54 RecordsEntry(std::unique_ptr<ForeachLoop> Loop)
55 : Loop(std::move(Loop)) {}
58 /// ForeachLoop - Record the iteration state associated with a for loop.
59 /// This is used to instantiate items in the loop body.
64 std::vector<RecordsEntry> Entries;
68 ForeachLoop(SMLoc Loc, VarInit *IVar, Init *LValue)
69 : Loc(Loc), IterVar(IVar), ListValue(LValue) {}
75 SmallVector<Init *, 16> Elements;
79 Record Rec; // Placeholder for template args and Name.
80 std::vector<RecordsEntry> Entries;
84 MultiClass(StringRef Name, SMLoc Loc, RecordKeeper &Records) :
85 Rec(Name, Loc, Records) {}
90 std::vector<SmallVector<LetRecord, 4>> LetStack;
91 std::map<std::string, std::unique_ptr<MultiClass>> MultiClasses;
93 /// Loops - Keep track of any foreach loops we are within.
95 std::vector<std::unique_ptr<ForeachLoop>> Loops;
97 SmallVector<DefsetRecord *, 2> Defsets;
99 /// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
101 MultiClass *CurMultiClass;
104 RecordKeeper &Records;
106 // A "named boolean" indicating how to parse identifiers. Usually
107 // identifiers map to some existing object but in special cases
108 // (e.g. parsing def names) no such object exists yet because we are
109 // in the middle of creating in. For those situations, allow the
110 // parser to ignore missing object errors.
112 ParseValueMode, // We are parsing a value we expect to look up.
113 ParseNameMode, // We are parsing a name of an object that does not yet
118 TGParser(SourceMgr &SrcMgr, ArrayRef<std::string> Macros,
119 RecordKeeper &records)
120 : Lex(SrcMgr, Macros), CurMultiClass(nullptr), Records(records) {}
122 /// ParseFile - Main entrypoint for parsing a tblgen file. These parser
123 /// routines return true on error, or false on success.
126 bool Error(SMLoc L, const Twine &Msg) const {
130 bool TokError(const Twine &Msg) const {
131 return Error(Lex.getLoc(), Msg);
133 const TGLexer::DependenciesMapTy &getDependencies() const {
134 return Lex.getDependencies();
137 private: // Semantic analysis methods.
138 bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
139 bool SetValue(Record *TheRec, SMLoc Loc, Init *ValName,
140 ArrayRef<unsigned> BitList, Init *V,
141 bool AllowSelfAssignment = false);
142 bool AddSubClass(Record *Rec, SubClassReference &SubClass);
143 bool AddSubClass(RecordsEntry &Entry, SubClassReference &SubClass);
144 bool AddSubMultiClass(MultiClass *CurMC,
145 SubMultiClassReference &SubMultiClass);
147 using SubstStack = SmallVector<std::pair<Init *, Init *>, 8>;
149 bool addEntry(RecordsEntry E);
150 bool resolve(const ForeachLoop &Loop, SubstStack &Stack, bool Final,
151 std::vector<RecordsEntry> *Dest, SMLoc *Loc = nullptr);
152 bool resolve(const std::vector<RecordsEntry> &Source, SubstStack &Substs,
153 bool Final, std::vector<RecordsEntry> *Dest,
154 SMLoc *Loc = nullptr);
155 bool addDefOne(std::unique_ptr<Record> Rec);
157 private: // Parser methods.
158 bool ParseObjectList(MultiClass *MC = nullptr);
159 bool ParseObject(MultiClass *MC);
161 bool ParseMultiClass();
162 bool ParseDefm(MultiClass *CurMultiClass);
163 bool ParseDef(MultiClass *CurMultiClass);
165 bool ParseForeach(MultiClass *CurMultiClass);
166 bool ParseTopLevelLet(MultiClass *CurMultiClass);
167 void ParseLetList(SmallVectorImpl<LetRecord> &Result);
169 bool ParseObjectBody(Record *CurRec);
170 bool ParseBody(Record *CurRec);
171 bool ParseBodyItem(Record *CurRec);
173 bool ParseTemplateArgList(Record *CurRec);
174 Init *ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
175 VarInit *ParseForeachDeclaration(Init *&ForeachListValue);
177 SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
178 SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
180 Init *ParseIDValue(Record *CurRec, StringInit *Name, SMLoc NameLoc,
181 IDParseMode Mode = ParseValueMode);
182 Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = nullptr,
183 IDParseMode Mode = ParseValueMode);
184 Init *ParseValue(Record *CurRec, RecTy *ItemType = nullptr,
185 IDParseMode Mode = ParseValueMode);
186 void ParseValueList(SmallVectorImpl<llvm::Init*> &Result, Record *CurRec,
187 Record *ArgsRec = nullptr, RecTy *EltTy = nullptr);
188 void ParseDagArgList(
189 SmallVectorImpl<std::pair<llvm::Init*, StringInit*>> &Result,
191 bool ParseOptionalRangeList(SmallVectorImpl<unsigned> &Ranges);
192 bool ParseOptionalBitList(SmallVectorImpl<unsigned> &Ranges);
193 void ParseRangeList(SmallVectorImpl<unsigned> &Result);
194 bool ParseRangePiece(SmallVectorImpl<unsigned> &Ranges);
196 Init *ParseOperation(Record *CurRec, RecTy *ItemType);
197 RecTy *ParseOperatorType();
198 Init *ParseObjectName(MultiClass *CurMultiClass);
199 Record *ParseClassID();
200 MultiClass *ParseMultiClassID();
201 bool ApplyLetStack(Record *CurRec);
202 bool ApplyLetStack(RecordsEntry &Entry);
205 } // end namespace llvm