1 //===- TGParser.cpp - Parser for TableGen Files ---------------------------===//
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 // Implement the Parser for TableGen.
12 //===----------------------------------------------------------------------===//
18 #include "llvm/ADT/StringExtras.h"
19 #include "llvm/Support/Streams.h"
22 //===----------------------------------------------------------------------===//
23 // Support Code for the Semantic Actions.
24 //===----------------------------------------------------------------------===//
27 struct SubClassReference {
30 std::vector<Init*> TemplateArgs;
31 SubClassReference() : Rec(0) {}
33 bool isInvalid() const { return Rec == 0; }
36 struct SubMultiClassReference {
39 std::vector<Init*> TemplateArgs;
40 SubMultiClassReference() : MC(0) {}
42 bool isInvalid() const { return MC == 0; }
46 void SubMultiClassReference::dump() const {
47 cerr << "Multiclass:\n";
51 cerr << "Template args:\n";
52 for (std::vector<Init *>::const_iterator i = TemplateArgs.begin(),
53 iend = TemplateArgs.end();
60 } // end namespace llvm
62 bool TGParser::AddValue(Record *CurRec, TGLoc Loc, const RecordVal &RV) {
64 CurRec = &CurMultiClass->Rec;
66 if (RecordVal *ERV = CurRec->getValue(RV.getName())) {
67 // The value already exists in the class, treat this as a set.
68 if (ERV->setValue(RV.getValue()))
69 return Error(Loc, "New definition of '" + RV.getName() + "' of type '" +
70 RV.getType()->getAsString() + "' is incompatible with " +
71 "previous definition of type '" +
72 ERV->getType()->getAsString() + "'");
80 /// Return true on error, false on success.
81 bool TGParser::SetValue(Record *CurRec, TGLoc Loc, const std::string &ValName,
82 const std::vector<unsigned> &BitList, Init *V) {
85 if (CurRec == 0) CurRec = &CurMultiClass->Rec;
87 RecordVal *RV = CurRec->getValue(ValName);
89 return Error(Loc, "Value '" + ValName + "' unknown!");
91 // Do not allow assignments like 'X = X'. This will just cause infinite loops
92 // in the resolution machinery.
94 if (VarInit *VI = dynamic_cast<VarInit*>(V))
95 if (VI->getName() == ValName)
98 // If we are assigning to a subset of the bits in the value... then we must be
99 // assigning to a field of BitsRecTy, which must have a BitsInit
102 if (!BitList.empty()) {
103 BitsInit *CurVal = dynamic_cast<BitsInit*>(RV->getValue());
105 return Error(Loc, "Value '" + ValName + "' is not a bits type");
107 // Convert the incoming value to a bits type of the appropriate size...
108 Init *BI = V->convertInitializerTo(new BitsRecTy(BitList.size()));
110 V->convertInitializerTo(new BitsRecTy(BitList.size()));
111 return Error(Loc, "Initializer is not compatible with bit range");
114 // We should have a BitsInit type now.
115 BitsInit *BInit = dynamic_cast<BitsInit*>(BI);
118 BitsInit *NewVal = new BitsInit(CurVal->getNumBits());
120 // Loop over bits, assigning values as appropriate.
121 for (unsigned i = 0, e = BitList.size(); i != e; ++i) {
122 unsigned Bit = BitList[i];
123 if (NewVal->getBit(Bit))
124 return Error(Loc, "Cannot set bit #" + utostr(Bit) + " of value '" +
125 ValName + "' more than once");
126 NewVal->setBit(Bit, BInit->getBit(i));
129 for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
130 if (NewVal->getBit(i) == 0)
131 NewVal->setBit(i, CurVal->getBit(i));
137 return Error(Loc, "Value '" + ValName + "' of type '" +
138 RV->getType()->getAsString() +
139 "' is incompatible with initializer '" + V->getAsString() +"'");
143 /// AddSubClass - Add SubClass as a subclass to CurRec, resolving its template
144 /// args as SubClass's template arguments.
145 bool TGParser::AddSubClass(Record *CurRec, SubClassReference &SubClass) {
146 Record *SC = SubClass.Rec;
147 // Add all of the values in the subclass into the current class.
148 const std::vector<RecordVal> &Vals = SC->getValues();
149 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
150 if (AddValue(CurRec, SubClass.RefLoc, Vals[i]))
153 const std::vector<std::string> &TArgs = SC->getTemplateArgs();
155 // Ensure that an appropriate number of template arguments are specified.
156 if (TArgs.size() < SubClass.TemplateArgs.size())
157 return Error(SubClass.RefLoc, "More template args specified than expected");
159 // Loop over all of the template arguments, setting them to the specified
160 // value or leaving them as the default if necessary.
161 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
162 if (i < SubClass.TemplateArgs.size()) {
163 // If a value is specified for this template arg, set it now.
164 if (SetValue(CurRec, SubClass.RefLoc, TArgs[i], std::vector<unsigned>(),
165 SubClass.TemplateArgs[i]))
169 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
172 CurRec->removeValue(TArgs[i]);
174 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
175 return Error(SubClass.RefLoc,"Value not specified for template argument #"
176 + utostr(i) + " (" + TArgs[i] + ") of subclass '" +
177 SC->getName() + "'!");
181 // Since everything went well, we can now set the "superclass" list for the
183 const std::vector<Record*> &SCs = SC->getSuperClasses();
184 for (unsigned i = 0, e = SCs.size(); i != e; ++i) {
185 if (CurRec->isSubClassOf(SCs[i]))
186 return Error(SubClass.RefLoc,
187 "Already subclass of '" + SCs[i]->getName() + "'!\n");
188 CurRec->addSuperClass(SCs[i]);
191 if (CurRec->isSubClassOf(SC))
192 return Error(SubClass.RefLoc,
193 "Already subclass of '" + SC->getName() + "'!\n");
194 CurRec->addSuperClass(SC);
198 /// AddSubMultiClass - Add SubMultiClass as a subclass to
199 /// CurMC, resolving its template args as SubMultiClass's
200 /// template arguments.
201 bool TGParser::AddSubMultiClass(MultiClass *CurMC,
202 SubMultiClassReference &SubMultiClass) {
203 MultiClass *SMC = SubMultiClass.MC;
204 Record *CurRec = &CurMC->Rec;
206 const std::vector<RecordVal> &MCVals = CurRec->getValues();
208 // Add all of the values in the subclass into the current class.
209 const std::vector<RecordVal> &SMCVals = SMC->Rec.getValues();
210 for (unsigned i = 0, e = SMCVals.size(); i != e; ++i)
211 if (AddValue(CurRec, SubMultiClass.RefLoc, SMCVals[i]))
214 int newDefStart = CurMC->DefPrototypes.size();
216 // Add all of the defs in the subclass into the current multiclass.
217 for (MultiClass::RecordVector::const_iterator i = SMC->DefPrototypes.begin(),
218 iend = SMC->DefPrototypes.end();
221 // Clone the def and add it to the current multiclass
222 Record *NewDef = new Record(**i);
224 // Add all of the values in the superclass into the current def.
225 for (unsigned i = 0, e = MCVals.size(); i != e; ++i)
226 if (AddValue(NewDef, SubMultiClass.RefLoc, MCVals[i]))
229 CurMC->DefPrototypes.push_back(NewDef);
232 const std::vector<std::string> &SMCTArgs = SMC->Rec.getTemplateArgs();
234 // Ensure that an appropriate number of template arguments are
236 if (SMCTArgs.size() < SubMultiClass.TemplateArgs.size())
237 return Error(SubMultiClass.RefLoc,
238 "More template args specified than expected");
240 // Loop over all of the template arguments, setting them to the specified
241 // value or leaving them as the default if necessary.
242 for (unsigned i = 0, e = SMCTArgs.size(); i != e; ++i) {
243 if (i < SubMultiClass.TemplateArgs.size()) {
244 // If a value is specified for this template arg, set it in the
246 if (SetValue(CurRec, SubMultiClass.RefLoc, SMCTArgs[i],
247 std::vector<unsigned>(),
248 SubMultiClass.TemplateArgs[i]))
252 CurRec->resolveReferencesTo(CurRec->getValue(SMCTArgs[i]));
255 CurRec->removeValue(SMCTArgs[i]);
257 // If a value is specified for this template arg, set it in the
259 for (MultiClass::RecordVector::iterator j =
260 CurMC->DefPrototypes.begin() + newDefStart,
261 jend = CurMC->DefPrototypes.end();
266 if (SetValue(Def, SubMultiClass.RefLoc, SMCTArgs[i],
267 std::vector<unsigned>(),
268 SubMultiClass.TemplateArgs[i]))
272 Def->resolveReferencesTo(Def->getValue(SMCTArgs[i]));
275 Def->removeValue(SMCTArgs[i]);
277 } else if (!CurRec->getValue(SMCTArgs[i])->getValue()->isComplete()) {
278 return Error(SubMultiClass.RefLoc,
279 "Value not specified for template argument #"
280 + utostr(i) + " (" + SMCTArgs[i] + ") of subclass '" +
281 SMC->Rec.getName() + "'!");
288 //===----------------------------------------------------------------------===//
290 //===----------------------------------------------------------------------===//
292 /// isObjectStart - Return true if this is a valid first token for an Object.
293 static bool isObjectStart(tgtok::TokKind K) {
294 return K == tgtok::Class || K == tgtok::Def ||
295 K == tgtok::Defm || K == tgtok::Let || K == tgtok::MultiClass;
298 /// ParseObjectName - If an object name is specified, return it. Otherwise,
299 /// return an anonymous name.
300 /// ObjectName ::= ID
301 /// ObjectName ::= /*empty*/
303 std::string TGParser::ParseObjectName() {
304 if (Lex.getCode() == tgtok::Id) {
305 std::string Ret = Lex.getCurStrVal();
310 static unsigned AnonCounter = 0;
311 return "anonymous."+utostr(AnonCounter++);
315 /// ParseClassID - Parse and resolve a reference to a class name. This returns
320 Record *TGParser::ParseClassID() {
321 if (Lex.getCode() != tgtok::Id) {
322 TokError("expected name for ClassID");
326 Record *Result = Records.getClass(Lex.getCurStrVal());
328 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
334 /// ParseMultiClassID - Parse and resolve a reference to a multiclass name.
335 /// This returns null on error.
337 /// MultiClassID ::= ID
339 MultiClass *TGParser::ParseMultiClassID() {
340 if (Lex.getCode() != tgtok::Id) {
341 TokError("expected name for ClassID");
345 MultiClass *Result = MultiClasses[Lex.getCurStrVal()];
347 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
353 Record *TGParser::ParseDefmID() {
354 if (Lex.getCode() != tgtok::Id) {
355 TokError("expected multiclass name");
359 MultiClass *MC = MultiClasses[Lex.getCurStrVal()];
361 TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
371 /// ParseSubClassReference - Parse a reference to a subclass or to a templated
372 /// subclass. This returns a SubClassRefTy with a null Record* on error.
374 /// SubClassRef ::= ClassID
375 /// SubClassRef ::= ClassID '<' ValueList '>'
377 SubClassReference TGParser::
378 ParseSubClassReference(Record *CurRec, bool isDefm) {
379 SubClassReference Result;
380 Result.RefLoc = Lex.getLoc();
383 Result.Rec = ParseDefmID();
385 Result.Rec = ParseClassID();
386 if (Result.Rec == 0) return Result;
388 // If there is no template arg list, we're done.
389 if (Lex.getCode() != tgtok::less)
391 Lex.Lex(); // Eat the '<'
393 if (Lex.getCode() == tgtok::greater) {
394 TokError("subclass reference requires a non-empty list of template values");
399 Result.TemplateArgs = ParseValueList(CurRec);
400 if (Result.TemplateArgs.empty()) {
401 Result.Rec = 0; // Error parsing value list.
405 if (Lex.getCode() != tgtok::greater) {
406 TokError("expected '>' in template value list");
415 /// ParseSubMultiClassReference - Parse a reference to a subclass or to a
416 /// templated submulticlass. This returns a SubMultiClassRefTy with a null
417 /// Record* on error.
419 /// SubMultiClassRef ::= MultiClassID
420 /// SubMultiClassRef ::= MultiClassID '<' ValueList '>'
422 SubMultiClassReference TGParser::
423 ParseSubMultiClassReference(MultiClass *CurMC) {
424 SubMultiClassReference Result;
425 Result.RefLoc = Lex.getLoc();
427 Result.MC = ParseMultiClassID();
428 if (Result.MC == 0) return Result;
430 // If there is no template arg list, we're done.
431 if (Lex.getCode() != tgtok::less)
433 Lex.Lex(); // Eat the '<'
435 if (Lex.getCode() == tgtok::greater) {
436 TokError("subclass reference requires a non-empty list of template values");
441 Result.TemplateArgs = ParseValueList(&CurMC->Rec);
442 if (Result.TemplateArgs.empty()) {
443 Result.MC = 0; // Error parsing value list.
447 if (Lex.getCode() != tgtok::greater) {
448 TokError("expected '>' in template value list");
457 /// ParseRangePiece - Parse a bit/value range.
458 /// RangePiece ::= INTVAL
459 /// RangePiece ::= INTVAL '-' INTVAL
460 /// RangePiece ::= INTVAL INTVAL
461 bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
462 if (Lex.getCode() != tgtok::IntVal) {
463 TokError("expected integer or bitrange");
466 int64_t Start = Lex.getCurIntVal();
470 return TokError("invalid range, cannot be negative");
472 switch (Lex.Lex()) { // eat first character.
474 Ranges.push_back(Start);
477 if (Lex.Lex() != tgtok::IntVal) {
478 TokError("expected integer value as end of range");
481 End = Lex.getCurIntVal();
484 End = -Lex.getCurIntVal();
488 return TokError("invalid range, cannot be negative");
493 for (; Start <= End; ++Start)
494 Ranges.push_back(Start);
496 for (; Start >= End; --Start)
497 Ranges.push_back(Start);
502 /// ParseRangeList - Parse a list of scalars and ranges into scalar values.
504 /// RangeList ::= RangePiece (',' RangePiece)*
506 std::vector<unsigned> TGParser::ParseRangeList() {
507 std::vector<unsigned> Result;
509 // Parse the first piece.
510 if (ParseRangePiece(Result))
511 return std::vector<unsigned>();
512 while (Lex.getCode() == tgtok::comma) {
513 Lex.Lex(); // Eat the comma.
515 // Parse the next range piece.
516 if (ParseRangePiece(Result))
517 return std::vector<unsigned>();
522 /// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
523 /// OptionalRangeList ::= '<' RangeList '>'
524 /// OptionalRangeList ::= /*empty*/
525 bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
526 if (Lex.getCode() != tgtok::less)
529 TGLoc StartLoc = Lex.getLoc();
530 Lex.Lex(); // eat the '<'
532 // Parse the range list.
533 Ranges = ParseRangeList();
534 if (Ranges.empty()) return true;
536 if (Lex.getCode() != tgtok::greater) {
537 TokError("expected '>' at end of range list");
538 return Error(StartLoc, "to match this '<'");
540 Lex.Lex(); // eat the '>'.
544 /// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
545 /// OptionalBitList ::= '{' RangeList '}'
546 /// OptionalBitList ::= /*empty*/
547 bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
548 if (Lex.getCode() != tgtok::l_brace)
551 TGLoc StartLoc = Lex.getLoc();
552 Lex.Lex(); // eat the '{'
554 // Parse the range list.
555 Ranges = ParseRangeList();
556 if (Ranges.empty()) return true;
558 if (Lex.getCode() != tgtok::r_brace) {
559 TokError("expected '}' at end of bit list");
560 return Error(StartLoc, "to match this '{'");
562 Lex.Lex(); // eat the '}'.
567 /// ParseType - Parse and return a tblgen type. This returns null on error.
569 /// Type ::= STRING // string type
570 /// Type ::= BIT // bit type
571 /// Type ::= BITS '<' INTVAL '>' // bits<x> type
572 /// Type ::= INT // int type
573 /// Type ::= LIST '<' Type '>' // list<x> type
574 /// Type ::= CODE // code type
575 /// Type ::= DAG // dag type
576 /// Type ::= ClassID // Record Type
578 RecTy *TGParser::ParseType() {
579 switch (Lex.getCode()) {
580 default: TokError("Unknown token when expecting a type"); return 0;
581 case tgtok::String: Lex.Lex(); return new StringRecTy();
582 case tgtok::Bit: Lex.Lex(); return new BitRecTy();
583 case tgtok::Int: Lex.Lex(); return new IntRecTy();
584 case tgtok::Code: Lex.Lex(); return new CodeRecTy();
585 case tgtok::Dag: Lex.Lex(); return new DagRecTy();
587 if (Record *R = ParseClassID()) return new RecordRecTy(R);
590 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
591 TokError("expected '<' after bits type");
594 if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
595 TokError("expected integer in bits<n> type");
598 uint64_t Val = Lex.getCurIntVal();
599 if (Lex.Lex() != tgtok::greater) { // Eat count.
600 TokError("expected '>' at end of bits<n> type");
603 Lex.Lex(); // Eat '>'
604 return new BitsRecTy(Val);
607 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
608 TokError("expected '<' after list type");
611 Lex.Lex(); // Eat '<'
612 RecTy *SubType = ParseType();
613 if (SubType == 0) return 0;
615 if (Lex.getCode() != tgtok::greater) {
616 TokError("expected '>' at end of list<ty> type");
619 Lex.Lex(); // Eat '>'
620 return new ListRecTy(SubType);
625 /// ParseIDValue - Parse an ID as a value and decode what it means.
627 /// IDValue ::= ID [def local value]
628 /// IDValue ::= ID [def template arg]
629 /// IDValue ::= ID [multiclass local value]
630 /// IDValue ::= ID [multiclass template argument]
631 /// IDValue ::= ID [def name]
633 Init *TGParser::ParseIDValue(Record *CurRec) {
634 assert(Lex.getCode() == tgtok::Id && "Expected ID in ParseIDValue");
635 std::string Name = Lex.getCurStrVal();
636 TGLoc Loc = Lex.getLoc();
638 return ParseIDValue(CurRec, Name, Loc);
641 /// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
642 /// has already been read.
643 Init *TGParser::ParseIDValue(Record *CurRec,
644 const std::string &Name, TGLoc NameLoc) {
646 if (const RecordVal *RV = CurRec->getValue(Name))
647 return new VarInit(Name, RV->getType());
649 std::string TemplateArgName = CurRec->getName()+":"+Name;
650 if (CurRec->isTemplateArg(TemplateArgName)) {
651 const RecordVal *RV = CurRec->getValue(TemplateArgName);
652 assert(RV && "Template arg doesn't exist??");
653 return new VarInit(TemplateArgName, RV->getType());
658 std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
659 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
660 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
661 assert(RV && "Template arg doesn't exist??");
662 return new VarInit(MCName, RV->getType());
666 if (Record *D = Records.getDef(Name))
667 return new DefInit(D);
669 Error(NameLoc, "Variable not defined: '" + Name + "'");
673 /// ParseOperation - Parse an operator. This returns null on error.
675 /// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
677 Init *TGParser::ParseOperation(Record *CurRec) {
678 switch (Lex.getCode()) {
680 TokError("unknown operation");
686 case tgtok::XCast: { // Value ::= !unop '(' Value ')'
687 UnOpInit::UnaryOp Code;
690 switch (Lex.getCode()) {
691 default: assert(0 && "Unhandled code!");
693 Lex.Lex(); // eat the operation
694 Code = UnOpInit::CAST;
696 Type = ParseOperatorType();
699 TokError("did not get type for unary operator");
705 Lex.Lex(); // eat the operation
706 Code = UnOpInit::CAR;
709 Lex.Lex(); // eat the operation
710 Code = UnOpInit::CDR;
713 Lex.Lex(); // eat the operation
714 Code = UnOpInit::LNULL;
718 if (Lex.getCode() != tgtok::l_paren) {
719 TokError("expected '(' after unary operator");
722 Lex.Lex(); // eat the '('
724 Init *LHS = ParseValue(CurRec);
725 if (LHS == 0) return 0;
727 if (Code == UnOpInit::CAR
728 || Code == UnOpInit::CDR
729 || Code == UnOpInit::LNULL) {
730 ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
731 TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
732 if (LHSl == 0 && LHSt == 0) {
733 TokError("expected list type argument in unary operator");
737 ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
739 TokError("expected list type argumnet in unary operator");
744 if (Code == UnOpInit::CAR
745 || Code == UnOpInit::CDR) {
746 if (LHSl && LHSl->getSize() == 0) {
747 TokError("empty list argument in unary operator");
751 Init *Item = LHSl->getElement(0);
752 TypedInit *Itemt = dynamic_cast<TypedInit*>(Item);
754 TokError("untyped list element in unary operator");
757 if (Code == UnOpInit::CAR) {
758 Type = Itemt->getType();
761 Type = new ListRecTy(Itemt->getType());
765 assert(LHSt && "expected list type argument in unary operator");
766 ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
768 TokError("expected list type argumnet in unary operator");
771 if (Code == UnOpInit::CAR) {
772 Type = LType->getElementType();
781 if (Lex.getCode() != tgtok::r_paren) {
782 TokError("expected ')' in unary operator");
785 Lex.Lex(); // eat the ')'
786 return (new UnOpInit(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
793 case tgtok::XStrConcat:
794 case tgtok::XNameConcat: { // Value ::= !binop '(' Value ',' Value ')'
795 BinOpInit::BinaryOp Code;
799 switch (Lex.getCode()) {
800 default: assert(0 && "Unhandled code!");
802 Lex.Lex(); // eat the operation
803 Code = BinOpInit::CONCAT;
804 Type = new DagRecTy();
807 Lex.Lex(); // eat the operation
808 Code = BinOpInit::SRA;
809 Type = new IntRecTy();
812 Lex.Lex(); // eat the operation
813 Code = BinOpInit::SRL;
814 Type = new IntRecTy();
817 Lex.Lex(); // eat the operation
818 Code = BinOpInit::SHL;
819 Type = new IntRecTy();
821 case tgtok::XStrConcat:
822 Lex.Lex(); // eat the operation
823 Code = BinOpInit::STRCONCAT;
824 Type = new StringRecTy();
826 case tgtok::XNameConcat:
827 Lex.Lex(); // eat the operation
828 Code = BinOpInit::NAMECONCAT;
830 Type = ParseOperatorType();
833 TokError("did not get type for binary operator");
839 if (Lex.getCode() != tgtok::l_paren) {
840 TokError("expected '(' after binary operator");
843 Lex.Lex(); // eat the '('
845 Init *LHS = ParseValue(CurRec);
846 if (LHS == 0) return 0;
848 if (Lex.getCode() != tgtok::comma) {
849 TokError("expected ',' in binary operator");
852 Lex.Lex(); // eat the ','
854 Init *RHS = ParseValue(CurRec);
855 if (RHS == 0) return 0;
857 if (Lex.getCode() != tgtok::r_paren) {
858 TokError("expected ')' in binary operator");
861 Lex.Lex(); // eat the ')'
862 return (new BinOpInit(Code, LHS, RHS, Type))->Fold(CurRec, CurMultiClass);
866 case tgtok::XForEach:
867 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
868 TernOpInit::TernaryOp Code;
872 tgtok::TokKind LexCode = Lex.getCode();
873 Lex.Lex(); // eat the operation
875 default: assert(0 && "Unhandled code!");
877 Code = TernOpInit::IF;
879 case tgtok::XForEach:
880 Code = TernOpInit::FOREACH;
883 Code = TernOpInit::SUBST;
886 if (Lex.getCode() != tgtok::l_paren) {
887 TokError("expected '(' after ternary operator");
890 Lex.Lex(); // eat the '('
892 Init *LHS = ParseValue(CurRec);
893 if (LHS == 0) return 0;
895 if (Lex.getCode() != tgtok::comma) {
896 TokError("expected ',' in ternary operator");
899 Lex.Lex(); // eat the ','
901 Init *MHS = ParseValue(CurRec);
902 if (MHS == 0) return 0;
904 if (Lex.getCode() != tgtok::comma) {
905 TokError("expected ',' in ternary operator");
908 Lex.Lex(); // eat the ','
910 Init *RHS = ParseValue(CurRec);
911 if (RHS == 0) return 0;
913 if (Lex.getCode() != tgtok::r_paren) {
914 TokError("expected ')' in binary operator");
917 Lex.Lex(); // eat the ')'
920 default: assert(0 && "Unhandled code!");
922 TypedInit *MHSt = dynamic_cast<TypedInit *>(MHS);
923 TypedInit *RHSt = dynamic_cast<TypedInit *>(RHS);
924 if (MHSt == 0 || RHSt == 0) {
925 TokError("could not get type for !if");
928 if (MHSt->getType()->typeIsConvertibleTo(RHSt->getType())) {
929 Type = RHSt->getType();
931 else if (RHSt->getType()->typeIsConvertibleTo(MHSt->getType())) {
932 Type = MHSt->getType();
935 TokError("inconsistent types for !if");
940 case tgtok::XForEach: {
941 TypedInit *MHSt = dynamic_cast<TypedInit *>(MHS);
943 TokError("could not get type for !foreach");
946 Type = MHSt->getType();
949 case tgtok::XSubst: {
950 TypedInit *RHSt = dynamic_cast<TypedInit *>(RHS);
952 TokError("could not get type for !subst");
955 Type = RHSt->getType();
959 return (new TernOpInit(Code, LHS, MHS, RHS, Type))->Fold(CurRec, CurMultiClass);
962 TokError("could not parse operation");
966 /// ParseOperatorType - Parse a type for an operator. This returns
969 /// OperatorType ::= '<' Type '>'
971 RecTy *TGParser::ParseOperatorType(void) {
974 if (Lex.getCode() != tgtok::less) {
975 TokError("expected type name for operator");
978 Lex.Lex(); // eat the <
983 TokError("expected type name for operator");
987 if (Lex.getCode() != tgtok::greater) {
988 TokError("expected type name for operator");
991 Lex.Lex(); // eat the >
997 /// ParseSimpleValue - Parse a tblgen value. This returns null on error.
999 /// SimpleValue ::= IDValue
1000 /// SimpleValue ::= INTVAL
1001 /// SimpleValue ::= STRVAL+
1002 /// SimpleValue ::= CODEFRAGMENT
1003 /// SimpleValue ::= '?'
1004 /// SimpleValue ::= '{' ValueList '}'
1005 /// SimpleValue ::= ID '<' ValueListNE '>'
1006 /// SimpleValue ::= '[' ValueList ']'
1007 /// SimpleValue ::= '(' IDValue DagArgList ')'
1008 /// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
1009 /// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
1010 /// SimpleValue ::= SRATOK '(' Value ',' Value ')'
1011 /// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
1012 /// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
1014 Init *TGParser::ParseSimpleValue(Record *CurRec) {
1016 switch (Lex.getCode()) {
1017 default: TokError("Unknown token when parsing a value"); break;
1018 case tgtok::IntVal: R = new IntInit(Lex.getCurIntVal()); Lex.Lex(); break;
1019 case tgtok::StrVal: {
1020 std::string Val = Lex.getCurStrVal();
1023 // Handle multiple consecutive concatenated strings.
1024 while (Lex.getCode() == tgtok::StrVal) {
1025 Val += Lex.getCurStrVal();
1029 R = new StringInit(Val);
1032 case tgtok::CodeFragment:
1033 R = new CodeInit(Lex.getCurStrVal()); Lex.Lex(); break;
1034 case tgtok::question: R = new UnsetInit(); Lex.Lex(); break;
1036 TGLoc NameLoc = Lex.getLoc();
1037 std::string Name = Lex.getCurStrVal();
1038 if (Lex.Lex() != tgtok::less) // consume the Id.
1039 return ParseIDValue(CurRec, Name, NameLoc); // Value ::= IDValue
1041 // Value ::= ID '<' ValueListNE '>'
1042 if (Lex.Lex() == tgtok::greater) {
1043 TokError("expected non-empty value list");
1046 std::vector<Init*> ValueList = ParseValueList(CurRec);
1047 if (ValueList.empty()) return 0;
1049 if (Lex.getCode() != tgtok::greater) {
1050 TokError("expected '>' at end of value list");
1053 Lex.Lex(); // eat the '>'
1055 // This is a CLASS<initvalslist> expression. This is supposed to synthesize
1056 // a new anonymous definition, deriving from CLASS<initvalslist> with no
1058 Record *Class = Records.getClass(Name);
1060 Error(NameLoc, "Expected a class name, got '" + Name + "'");
1064 // Create the new record, set it as CurRec temporarily.
1065 static unsigned AnonCounter = 0;
1066 Record *NewRec = new Record("anonymous.val."+utostr(AnonCounter++),NameLoc);
1067 SubClassReference SCRef;
1068 SCRef.RefLoc = NameLoc;
1070 SCRef.TemplateArgs = ValueList;
1071 // Add info about the subclass to NewRec.
1072 if (AddSubClass(NewRec, SCRef))
1074 NewRec->resolveReferences();
1075 Records.addDef(NewRec);
1077 // The result of the expression is a reference to the new record.
1078 return new DefInit(NewRec);
1080 case tgtok::l_brace: { // Value ::= '{' ValueList '}'
1081 TGLoc BraceLoc = Lex.getLoc();
1082 Lex.Lex(); // eat the '{'
1083 std::vector<Init*> Vals;
1085 if (Lex.getCode() != tgtok::r_brace) {
1086 Vals = ParseValueList(CurRec);
1087 if (Vals.empty()) return 0;
1089 if (Lex.getCode() != tgtok::r_brace) {
1090 TokError("expected '}' at end of bit list value");
1093 Lex.Lex(); // eat the '}'
1095 BitsInit *Result = new BitsInit(Vals.size());
1096 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1097 Init *Bit = Vals[i]->convertInitializerTo(new BitRecTy());
1099 Error(BraceLoc, "Element #" + utostr(i) + " (" + Vals[i]->getAsString()+
1100 ") is not convertable to a bit");
1103 Result->setBit(Vals.size()-i-1, Bit);
1107 case tgtok::l_square: { // Value ::= '[' ValueList ']'
1108 Lex.Lex(); // eat the '['
1109 std::vector<Init*> Vals;
1111 if (Lex.getCode() != tgtok::r_square) {
1112 Vals = ParseValueList(CurRec);
1113 if (Vals.empty()) return 0;
1115 if (Lex.getCode() != tgtok::r_square) {
1116 TokError("expected ']' at end of list value");
1119 Lex.Lex(); // eat the ']'
1120 return new ListInit(Vals);
1122 case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
1123 Lex.Lex(); // eat the '('
1124 if (Lex.getCode() != tgtok::Id
1125 && Lex.getCode() != tgtok::XCast
1126 && Lex.getCode() != tgtok::XNameConcat) {
1127 TokError("expected identifier in dag init");
1132 if (Lex.getCode() == tgtok::Id) {
1133 Operator = ParseIDValue(CurRec);
1134 if (Operator == 0) return 0;
1137 Operator = ParseOperation(CurRec);
1138 if (Operator == 0) return 0;
1141 // If the operator name is present, parse it.
1142 std::string OperatorName;
1143 if (Lex.getCode() == tgtok::colon) {
1144 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1145 TokError("expected variable name in dag operator");
1148 OperatorName = Lex.getCurStrVal();
1149 Lex.Lex(); // eat the VarName.
1152 std::vector<std::pair<llvm::Init*, std::string> > DagArgs;
1153 if (Lex.getCode() != tgtok::r_paren) {
1154 DagArgs = ParseDagArgList(CurRec);
1155 if (DagArgs.empty()) return 0;
1158 if (Lex.getCode() != tgtok::r_paren) {
1159 TokError("expected ')' in dag init");
1162 Lex.Lex(); // eat the ')'
1164 return new DagInit(Operator, OperatorName, DagArgs);
1171 case tgtok::XCast: // Value ::= !unop '(' Value ')'
1172 case tgtok::XConcat:
1176 case tgtok::XStrConcat:
1177 case tgtok::XNameConcat: // Value ::= !binop '(' Value ',' Value ')'
1179 case tgtok::XForEach:
1180 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
1181 return ParseOperation(CurRec);
1189 /// ParseValue - Parse a tblgen value. This returns null on error.
1191 /// Value ::= SimpleValue ValueSuffix*
1192 /// ValueSuffix ::= '{' BitList '}'
1193 /// ValueSuffix ::= '[' BitList ']'
1194 /// ValueSuffix ::= '.' ID
1196 Init *TGParser::ParseValue(Record *CurRec) {
1197 Init *Result = ParseSimpleValue(CurRec);
1198 if (Result == 0) return 0;
1200 // Parse the suffixes now if present.
1202 switch (Lex.getCode()) {
1203 default: return Result;
1204 case tgtok::l_brace: {
1205 TGLoc CurlyLoc = Lex.getLoc();
1206 Lex.Lex(); // eat the '{'
1207 std::vector<unsigned> Ranges = ParseRangeList();
1208 if (Ranges.empty()) return 0;
1210 // Reverse the bitlist.
1211 std::reverse(Ranges.begin(), Ranges.end());
1212 Result = Result->convertInitializerBitRange(Ranges);
1214 Error(CurlyLoc, "Invalid bit range for value");
1219 if (Lex.getCode() != tgtok::r_brace) {
1220 TokError("expected '}' at end of bit range list");
1226 case tgtok::l_square: {
1227 TGLoc SquareLoc = Lex.getLoc();
1228 Lex.Lex(); // eat the '['
1229 std::vector<unsigned> Ranges = ParseRangeList();
1230 if (Ranges.empty()) return 0;
1232 Result = Result->convertInitListSlice(Ranges);
1234 Error(SquareLoc, "Invalid range for list slice");
1239 if (Lex.getCode() != tgtok::r_square) {
1240 TokError("expected ']' at end of list slice");
1247 if (Lex.Lex() != tgtok::Id) { // eat the .
1248 TokError("expected field identifier after '.'");
1251 if (!Result->getFieldType(Lex.getCurStrVal())) {
1252 TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
1253 Result->getAsString() + "'");
1256 Result = new FieldInit(Result, Lex.getCurStrVal());
1257 Lex.Lex(); // eat field name
1263 /// ParseDagArgList - Parse the argument list for a dag literal expression.
1265 /// ParseDagArgList ::= Value (':' VARNAME)?
1266 /// ParseDagArgList ::= ParseDagArgList ',' Value (':' VARNAME)?
1267 std::vector<std::pair<llvm::Init*, std::string> >
1268 TGParser::ParseDagArgList(Record *CurRec) {
1269 std::vector<std::pair<llvm::Init*, std::string> > Result;
1272 Init *Val = ParseValue(CurRec);
1273 if (Val == 0) return std::vector<std::pair<llvm::Init*, std::string> >();
1275 // If the variable name is present, add it.
1276 std::string VarName;
1277 if (Lex.getCode() == tgtok::colon) {
1278 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1279 TokError("expected variable name in dag literal");
1280 return std::vector<std::pair<llvm::Init*, std::string> >();
1282 VarName = Lex.getCurStrVal();
1283 Lex.Lex(); // eat the VarName.
1286 Result.push_back(std::make_pair(Val, VarName));
1288 if (Lex.getCode() != tgtok::comma) break;
1289 Lex.Lex(); // eat the ','
1296 /// ParseValueList - Parse a comma separated list of values, returning them as a
1297 /// vector. Note that this always expects to be able to parse at least one
1298 /// value. It returns an empty list if this is not possible.
1300 /// ValueList ::= Value (',' Value)
1302 std::vector<Init*> TGParser::ParseValueList(Record *CurRec) {
1303 std::vector<Init*> Result;
1304 Result.push_back(ParseValue(CurRec));
1305 if (Result.back() == 0) return std::vector<Init*>();
1307 while (Lex.getCode() == tgtok::comma) {
1308 Lex.Lex(); // Eat the comma
1310 Result.push_back(ParseValue(CurRec));
1311 if (Result.back() == 0) return std::vector<Init*>();
1319 /// ParseDeclaration - Read a declaration, returning the name of field ID, or an
1320 /// empty string on error. This can happen in a number of different context's,
1321 /// including within a def or in the template args for a def (which which case
1322 /// CurRec will be non-null) and within the template args for a multiclass (in
1323 /// which case CurRec will be null, but CurMultiClass will be set). This can
1324 /// also happen within a def that is within a multiclass, which will set both
1325 /// CurRec and CurMultiClass.
1327 /// Declaration ::= FIELD? Type ID ('=' Value)?
1329 std::string TGParser::ParseDeclaration(Record *CurRec,
1330 bool ParsingTemplateArgs) {
1331 // Read the field prefix if present.
1332 bool HasField = Lex.getCode() == tgtok::Field;
1333 if (HasField) Lex.Lex();
1335 RecTy *Type = ParseType();
1336 if (Type == 0) return "";
1338 if (Lex.getCode() != tgtok::Id) {
1339 TokError("Expected identifier in declaration");
1343 TGLoc IdLoc = Lex.getLoc();
1344 std::string DeclName = Lex.getCurStrVal();
1347 if (ParsingTemplateArgs) {
1349 DeclName = CurRec->getName() + ":" + DeclName;
1351 assert(CurMultiClass);
1354 DeclName = CurMultiClass->Rec.getName() + "::" + DeclName;
1358 if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
1361 // If a value is present, parse it.
1362 if (Lex.getCode() == tgtok::equal) {
1364 TGLoc ValLoc = Lex.getLoc();
1365 Init *Val = ParseValue(CurRec);
1367 SetValue(CurRec, ValLoc, DeclName, std::vector<unsigned>(), Val))
1374 /// ParseTemplateArgList - Read a template argument list, which is a non-empty
1375 /// sequence of template-declarations in <>'s. If CurRec is non-null, these are
1376 /// template args for a def, which may or may not be in a multiclass. If null,
1377 /// these are the template args for a multiclass.
1379 /// TemplateArgList ::= '<' Declaration (',' Declaration)* '>'
1381 bool TGParser::ParseTemplateArgList(Record *CurRec) {
1382 assert(Lex.getCode() == tgtok::less && "Not a template arg list!");
1383 Lex.Lex(); // eat the '<'
1385 Record *TheRecToAddTo = CurRec ? CurRec : &CurMultiClass->Rec;
1387 // Read the first declaration.
1388 std::string TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1389 if (TemplArg.empty())
1392 TheRecToAddTo->addTemplateArg(TemplArg);
1394 while (Lex.getCode() == tgtok::comma) {
1395 Lex.Lex(); // eat the ','
1397 // Read the following declarations.
1398 TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1399 if (TemplArg.empty())
1401 TheRecToAddTo->addTemplateArg(TemplArg);
1404 if (Lex.getCode() != tgtok::greater)
1405 return TokError("expected '>' at end of template argument list");
1406 Lex.Lex(); // eat the '>'.
1411 /// ParseBodyItem - Parse a single item at within the body of a def or class.
1413 /// BodyItem ::= Declaration ';'
1414 /// BodyItem ::= LET ID OptionalBitList '=' Value ';'
1415 bool TGParser::ParseBodyItem(Record *CurRec) {
1416 if (Lex.getCode() != tgtok::Let) {
1417 if (ParseDeclaration(CurRec, false).empty())
1420 if (Lex.getCode() != tgtok::semi)
1421 return TokError("expected ';' after declaration");
1426 // LET ID OptionalRangeList '=' Value ';'
1427 if (Lex.Lex() != tgtok::Id)
1428 return TokError("expected field identifier after let");
1430 TGLoc IdLoc = Lex.getLoc();
1431 std::string FieldName = Lex.getCurStrVal();
1432 Lex.Lex(); // eat the field name.
1434 std::vector<unsigned> BitList;
1435 if (ParseOptionalBitList(BitList))
1437 std::reverse(BitList.begin(), BitList.end());
1439 if (Lex.getCode() != tgtok::equal)
1440 return TokError("expected '=' in let expression");
1441 Lex.Lex(); // eat the '='.
1443 Init *Val = ParseValue(CurRec);
1444 if (Val == 0) return true;
1446 if (Lex.getCode() != tgtok::semi)
1447 return TokError("expected ';' after let expression");
1450 return SetValue(CurRec, IdLoc, FieldName, BitList, Val);
1453 /// ParseBody - Read the body of a class or def. Return true on error, false on
1457 /// Body ::= '{' BodyList '}'
1458 /// BodyList BodyItem*
1460 bool TGParser::ParseBody(Record *CurRec) {
1461 // If this is a null definition, just eat the semi and return.
1462 if (Lex.getCode() == tgtok::semi) {
1467 if (Lex.getCode() != tgtok::l_brace)
1468 return TokError("Expected ';' or '{' to start body");
1472 while (Lex.getCode() != tgtok::r_brace)
1473 if (ParseBodyItem(CurRec))
1481 /// ParseObjectBody - Parse the body of a def or class. This consists of an
1482 /// optional ClassList followed by a Body. CurRec is the current def or class
1483 /// that is being parsed.
1485 /// ObjectBody ::= BaseClassList Body
1486 /// BaseClassList ::= /*empty*/
1487 /// BaseClassList ::= ':' BaseClassListNE
1488 /// BaseClassListNE ::= SubClassRef (',' SubClassRef)*
1490 bool TGParser::ParseObjectBody(Record *CurRec) {
1491 // If there is a baseclass list, read it.
1492 if (Lex.getCode() == tgtok::colon) {
1495 // Read all of the subclasses.
1496 SubClassReference SubClass = ParseSubClassReference(CurRec, false);
1499 if (SubClass.Rec == 0) return true;
1502 if (AddSubClass(CurRec, SubClass))
1505 if (Lex.getCode() != tgtok::comma) break;
1506 Lex.Lex(); // eat ','.
1507 SubClass = ParseSubClassReference(CurRec, false);
1511 // Process any variables on the let stack.
1512 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1513 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1514 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1515 LetStack[i][j].Bits, LetStack[i][j].Value))
1518 return ParseBody(CurRec);
1522 /// ParseDef - Parse and return a top level or multiclass def, return the record
1523 /// corresponding to it. This returns null on error.
1525 /// DefInst ::= DEF ObjectName ObjectBody
1527 llvm::Record *TGParser::ParseDef(MultiClass *CurMultiClass) {
1528 TGLoc DefLoc = Lex.getLoc();
1529 assert(Lex.getCode() == tgtok::Def && "Unknown tok");
1530 Lex.Lex(); // Eat the 'def' token.
1532 // Parse ObjectName and make a record for it.
1533 Record *CurRec = new Record(ParseObjectName(), DefLoc);
1535 if (!CurMultiClass) {
1536 // Top-level def definition.
1538 // Ensure redefinition doesn't happen.
1539 if (Records.getDef(CurRec->getName())) {
1540 Error(DefLoc, "def '" + CurRec->getName() + "' already defined");
1543 Records.addDef(CurRec);
1545 // Otherwise, a def inside a multiclass, add it to the multiclass.
1546 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
1547 if (CurMultiClass->DefPrototypes[i]->getName() == CurRec->getName()) {
1548 Error(DefLoc, "def '" + CurRec->getName() +
1549 "' already defined in this multiclass!");
1552 CurMultiClass->DefPrototypes.push_back(CurRec);
1555 if (ParseObjectBody(CurRec))
1558 if (CurMultiClass == 0) // Def's in multiclasses aren't really defs.
1559 CurRec->resolveReferences();
1561 // If ObjectBody has template arguments, it's an error.
1562 assert(CurRec->getTemplateArgs().empty() && "How'd this get template args?");
1567 /// ParseClass - Parse a tblgen class definition.
1569 /// ClassInst ::= CLASS ID TemplateArgList? ObjectBody
1571 bool TGParser::ParseClass() {
1572 assert(Lex.getCode() == tgtok::Class && "Unexpected token!");
1575 if (Lex.getCode() != tgtok::Id)
1576 return TokError("expected class name after 'class' keyword");
1578 Record *CurRec = Records.getClass(Lex.getCurStrVal());
1580 // If the body was previously defined, this is an error.
1581 if (!CurRec->getValues().empty() ||
1582 !CurRec->getSuperClasses().empty() ||
1583 !CurRec->getTemplateArgs().empty())
1584 return TokError("Class '" + CurRec->getName() + "' already defined");
1586 // If this is the first reference to this class, create and add it.
1587 CurRec = new Record(Lex.getCurStrVal(), Lex.getLoc());
1588 Records.addClass(CurRec);
1590 Lex.Lex(); // eat the name.
1592 // If there are template args, parse them.
1593 if (Lex.getCode() == tgtok::less)
1594 if (ParseTemplateArgList(CurRec))
1597 // Finally, parse the object body.
1598 return ParseObjectBody(CurRec);
1601 /// ParseLetList - Parse a non-empty list of assignment expressions into a list
1604 /// LetList ::= LetItem (',' LetItem)*
1605 /// LetItem ::= ID OptionalRangeList '=' Value
1607 std::vector<LetRecord> TGParser::ParseLetList() {
1608 std::vector<LetRecord> Result;
1611 if (Lex.getCode() != tgtok::Id) {
1612 TokError("expected identifier in let definition");
1613 return std::vector<LetRecord>();
1615 std::string Name = Lex.getCurStrVal();
1616 TGLoc NameLoc = Lex.getLoc();
1617 Lex.Lex(); // Eat the identifier.
1619 // Check for an optional RangeList.
1620 std::vector<unsigned> Bits;
1621 if (ParseOptionalRangeList(Bits))
1622 return std::vector<LetRecord>();
1623 std::reverse(Bits.begin(), Bits.end());
1625 if (Lex.getCode() != tgtok::equal) {
1626 TokError("expected '=' in let expression");
1627 return std::vector<LetRecord>();
1629 Lex.Lex(); // eat the '='.
1631 Init *Val = ParseValue(0);
1632 if (Val == 0) return std::vector<LetRecord>();
1634 // Now that we have everything, add the record.
1635 Result.push_back(LetRecord(Name, Bits, Val, NameLoc));
1637 if (Lex.getCode() != tgtok::comma)
1639 Lex.Lex(); // eat the comma.
1643 /// ParseTopLevelLet - Parse a 'let' at top level. This can be a couple of
1644 /// different related productions.
1646 /// Object ::= LET LetList IN '{' ObjectList '}'
1647 /// Object ::= LET LetList IN Object
1649 bool TGParser::ParseTopLevelLet() {
1650 assert(Lex.getCode() == tgtok::Let && "Unexpected token");
1653 // Add this entry to the let stack.
1654 std::vector<LetRecord> LetInfo = ParseLetList();
1655 if (LetInfo.empty()) return true;
1656 LetStack.push_back(LetInfo);
1658 if (Lex.getCode() != tgtok::In)
1659 return TokError("expected 'in' at end of top-level 'let'");
1662 // If this is a scalar let, just handle it now
1663 if (Lex.getCode() != tgtok::l_brace) {
1664 // LET LetList IN Object
1667 } else { // Object ::= LETCommand '{' ObjectList '}'
1668 TGLoc BraceLoc = Lex.getLoc();
1669 // Otherwise, this is a group let.
1670 Lex.Lex(); // eat the '{'.
1672 // Parse the object list.
1673 if (ParseObjectList())
1676 if (Lex.getCode() != tgtok::r_brace) {
1677 TokError("expected '}' at end of top level let command");
1678 return Error(BraceLoc, "to match this '{'");
1683 // Outside this let scope, this let block is not active.
1684 LetStack.pop_back();
1688 /// ParseMultiClassDef - Parse a def in a multiclass context.
1690 /// MultiClassDef ::= DefInst
1692 bool TGParser::ParseMultiClassDef(MultiClass *CurMC) {
1693 if (Lex.getCode() != tgtok::Def)
1694 return TokError("expected 'def' in multiclass body");
1696 Record *D = ParseDef(CurMC);
1697 if (D == 0) return true;
1699 // Copy the template arguments for the multiclass into the def.
1700 const std::vector<std::string> &TArgs = CurMC->Rec.getTemplateArgs();
1702 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1703 const RecordVal *RV = CurMC->Rec.getValue(TArgs[i]);
1704 assert(RV && "Template arg doesn't exist?");
1711 /// ParseMultiClass - Parse a multiclass definition.
1713 /// MultiClassInst ::= MULTICLASS ID TemplateArgList?
1714 /// ':' BaseMultiClassList '{' MultiClassDef+ '}'
1716 bool TGParser::ParseMultiClass() {
1717 assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");
1718 Lex.Lex(); // Eat the multiclass token.
1720 if (Lex.getCode() != tgtok::Id)
1721 return TokError("expected identifier after multiclass for name");
1722 std::string Name = Lex.getCurStrVal();
1724 if (MultiClasses.count(Name))
1725 return TokError("multiclass '" + Name + "' already defined");
1727 CurMultiClass = MultiClasses[Name] = new MultiClass(Name, Lex.getLoc());
1728 Lex.Lex(); // Eat the identifier.
1730 // If there are template args, parse them.
1731 if (Lex.getCode() == tgtok::less)
1732 if (ParseTemplateArgList(0))
1735 bool inherits = false;
1737 // If there are submulticlasses, parse them.
1738 if (Lex.getCode() == tgtok::colon) {
1743 // Read all of the submulticlasses.
1744 SubMultiClassReference SubMultiClass =
1745 ParseSubMultiClassReference(CurMultiClass);
1748 if (SubMultiClass.MC == 0) return true;
1751 if (AddSubMultiClass(CurMultiClass, SubMultiClass))
1754 if (Lex.getCode() != tgtok::comma) break;
1755 Lex.Lex(); // eat ','.
1756 SubMultiClass = ParseSubMultiClassReference(CurMultiClass);
1760 if (Lex.getCode() != tgtok::l_brace) {
1762 return TokError("expected '{' in multiclass definition");
1764 if (Lex.getCode() != tgtok::semi)
1765 return TokError("expected ';' in multiclass definition");
1767 Lex.Lex(); // eat the ';'.
1770 if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
1771 return TokError("multiclass must contain at least one def");
1773 while (Lex.getCode() != tgtok::r_brace)
1774 if (ParseMultiClassDef(CurMultiClass))
1777 Lex.Lex(); // eat the '}'.
1784 /// ParseDefm - Parse the instantiation of a multiclass.
1786 /// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
1788 bool TGParser::ParseDefm() {
1789 assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
1790 if (Lex.Lex() != tgtok::Id) // eat the defm.
1791 return TokError("expected identifier after defm");
1793 TGLoc DefmPrefixLoc = Lex.getLoc();
1794 std::string DefmPrefix = Lex.getCurStrVal();
1795 if (Lex.Lex() != tgtok::colon)
1796 return TokError("expected ':' after defm identifier");
1801 TGLoc SubClassLoc = Lex.getLoc();
1802 SubClassReference Ref = ParseSubClassReference(0, true);
1805 if (Ref.Rec == 0) return true;
1807 // To instantiate a multiclass, we need to first get the multiclass, then
1808 // instantiate each def contained in the multiclass with the SubClassRef
1809 // template parameters.
1810 MultiClass *MC = MultiClasses[Ref.Rec->getName()];
1811 assert(MC && "Didn't lookup multiclass correctly?");
1812 std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
1814 // Verify that the correct number of template arguments were specified.
1815 const std::vector<std::string> &TArgs = MC->Rec.getTemplateArgs();
1816 if (TArgs.size() < TemplateVals.size())
1817 return Error(SubClassLoc,
1818 "more template args specified than multiclass expects");
1820 // Loop over all the def's in the multiclass, instantiating each one.
1821 for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
1822 Record *DefProto = MC->DefPrototypes[i];
1824 // Add in the defm name
1825 std::string DefName = DefProto->getName();
1826 std::string::size_type idx = DefName.find("#NAME#");
1827 if (idx != std::string::npos) {
1828 DefName.replace(idx, 6, DefmPrefix);
1831 // Add the suffix to the defm name to get the new name.
1832 DefName = DefmPrefix + DefName;
1835 Record *CurRec = new Record(DefName, DefmPrefixLoc);
1837 SubClassReference Ref;
1838 Ref.RefLoc = DefmPrefixLoc;
1840 AddSubClass(CurRec, Ref);
1842 // Loop over all of the template arguments, setting them to the specified
1843 // value or leaving them as the default if necessary.
1844 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1845 // Check if a value is specified for this temp-arg.
1846 if (i < TemplateVals.size()) {
1848 if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], std::vector<unsigned>(),
1853 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
1856 CurRec->removeValue(TArgs[i]);
1858 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
1859 return Error(SubClassLoc,
1860 "value not specified for template argument #"+
1861 utostr(i) + " (" + TArgs[i] + ") of multiclassclass '" +
1862 MC->Rec.getName() + "'");
1866 // If the mdef is inside a 'let' expression, add to each def.
1867 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1868 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1869 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1870 LetStack[i][j].Bits, LetStack[i][j].Value)) {
1871 Error(DefmPrefixLoc, "when instantiating this defm");
1875 // Ensure redefinition doesn't happen.
1876 if (Records.getDef(CurRec->getName()))
1877 return Error(DefmPrefixLoc, "def '" + CurRec->getName() +
1878 "' already defined, instantiating defm with subdef '" +
1879 DefProto->getName() + "'");
1880 Records.addDef(CurRec);
1881 CurRec->resolveReferences();
1884 if (Lex.getCode() != tgtok::comma) break;
1885 Lex.Lex(); // eat ','.
1887 SubClassLoc = Lex.getLoc();
1888 Ref = ParseSubClassReference(0, true);
1891 if (Lex.getCode() != tgtok::semi)
1892 return TokError("expected ';' at end of defm");
1899 /// Object ::= ClassInst
1900 /// Object ::= DefInst
1901 /// Object ::= MultiClassInst
1902 /// Object ::= DefMInst
1903 /// Object ::= LETCommand '{' ObjectList '}'
1904 /// Object ::= LETCommand Object
1905 bool TGParser::ParseObject() {
1906 switch (Lex.getCode()) {
1907 default: assert(0 && "This is not an object");
1908 case tgtok::Let: return ParseTopLevelLet();
1909 case tgtok::Def: return ParseDef(0) == 0;
1910 case tgtok::Defm: return ParseDefm();
1911 case tgtok::Class: return ParseClass();
1912 case tgtok::MultiClass: return ParseMultiClass();
1917 /// ObjectList :== Object*
1918 bool TGParser::ParseObjectList() {
1919 while (isObjectStart(Lex.getCode())) {
1927 bool TGParser::ParseFile() {
1928 Lex.Lex(); // Prime the lexer.
1929 if (ParseObjectList()) return true;
1931 // If we have unread input at the end of the file, report it.
1932 if (Lex.getCode() == tgtok::Eof)
1935 return TokError("Unexpected input at top level");