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 //===----------------------------------------------------------------------===//
16 #include "llvm/ADT/StringExtras.h"
21 //===----------------------------------------------------------------------===//
22 // Support Code for the Semantic Actions.
23 //===----------------------------------------------------------------------===//
26 struct SubClassReference {
29 std::vector<Init*> TemplateArgs;
30 SubClassReference() : Rec(0) {}
32 bool isInvalid() const { return Rec == 0; }
35 struct SubMultiClassReference {
38 std::vector<Init*> TemplateArgs;
39 SubMultiClassReference() : MC(0) {}
41 bool isInvalid() const { return MC == 0; }
45 void SubMultiClassReference::dump() const {
46 errs() << "Multiclass:\n";
50 errs() << "Template args:\n";
51 for (std::vector<Init *>::const_iterator i = TemplateArgs.begin(),
52 iend = TemplateArgs.end();
59 } // end namespace llvm
61 bool TGParser::AddValue(Record *CurRec, SMLoc Loc, const RecordVal &RV) {
63 CurRec = &CurMultiClass->Rec;
65 if (RecordVal *ERV = CurRec->getValue(RV.getName())) {
66 // The value already exists in the class, treat this as a set.
67 if (ERV->setValue(RV.getValue()))
68 return Error(Loc, "New definition of '" + RV.getName() + "' of type '" +
69 RV.getType()->getAsString() + "' is incompatible with " +
70 "previous definition of type '" +
71 ERV->getType()->getAsString() + "'");
79 /// Return true on error, false on success.
80 bool TGParser::SetValue(Record *CurRec, SMLoc Loc, const std::string &ValName,
81 const std::vector<unsigned> &BitList, Init *V) {
84 if (CurRec == 0) CurRec = &CurMultiClass->Rec;
86 RecordVal *RV = CurRec->getValue(ValName);
88 return Error(Loc, "Value '" + ValName + "' unknown!");
90 // Do not allow assignments like 'X = X'. This will just cause infinite loops
91 // in the resolution machinery.
93 if (VarInit *VI = dynamic_cast<VarInit*>(V))
94 if (VI->getName() == ValName)
97 // If we are assigning to a subset of the bits in the value... then we must be
98 // assigning to a field of BitsRecTy, which must have a BitsInit
101 if (!BitList.empty()) {
102 BitsInit *CurVal = dynamic_cast<BitsInit*>(RV->getValue());
104 return Error(Loc, "Value '" + ValName + "' is not a bits type");
106 // Convert the incoming value to a bits type of the appropriate size...
107 Init *BI = V->convertInitializerTo(new BitsRecTy(BitList.size()));
109 V->convertInitializerTo(new BitsRecTy(BitList.size()));
110 return Error(Loc, "Initializer is not compatible with bit range");
113 // We should have a BitsInit type now.
114 BitsInit *BInit = dynamic_cast<BitsInit*>(BI);
117 BitsInit *NewVal = new BitsInit(CurVal->getNumBits());
119 // Loop over bits, assigning values as appropriate.
120 for (unsigned i = 0, e = BitList.size(); i != e; ++i) {
121 unsigned Bit = BitList[i];
122 if (NewVal->getBit(Bit))
123 return Error(Loc, "Cannot set bit #" + utostr(Bit) + " of value '" +
124 ValName + "' more than once");
125 NewVal->setBit(Bit, BInit->getBit(i));
128 for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
129 if (NewVal->getBit(i) == 0)
130 NewVal->setBit(i, CurVal->getBit(i));
136 return Error(Loc, "Value '" + ValName + "' of type '" +
137 RV->getType()->getAsString() +
138 "' is incompatible with initializer '" + V->getAsString() +"'");
142 /// AddSubClass - Add SubClass as a subclass to CurRec, resolving its template
143 /// args as SubClass's template arguments.
144 bool TGParser::AddSubClass(Record *CurRec, SubClassReference &SubClass) {
145 Record *SC = SubClass.Rec;
146 // Add all of the values in the subclass into the current class.
147 const std::vector<RecordVal> &Vals = SC->getValues();
148 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
149 if (AddValue(CurRec, SubClass.RefLoc, Vals[i]))
152 const std::vector<std::string> &TArgs = SC->getTemplateArgs();
154 // Ensure that an appropriate number of template arguments are specified.
155 if (TArgs.size() < SubClass.TemplateArgs.size())
156 return Error(SubClass.RefLoc, "More template args specified than expected");
158 // Loop over all of the template arguments, setting them to the specified
159 // value or leaving them as the default if necessary.
160 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
161 if (i < SubClass.TemplateArgs.size()) {
162 // If a value is specified for this template arg, set it now.
163 if (SetValue(CurRec, SubClass.RefLoc, TArgs[i], std::vector<unsigned>(),
164 SubClass.TemplateArgs[i]))
168 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
171 CurRec->removeValue(TArgs[i]);
173 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
174 return Error(SubClass.RefLoc,"Value not specified for template argument #"
175 + utostr(i) + " (" + TArgs[i] + ") of subclass '" +
176 SC->getName() + "'!");
180 // Since everything went well, we can now set the "superclass" list for the
182 const std::vector<Record*> &SCs = SC->getSuperClasses();
183 for (unsigned i = 0, e = SCs.size(); i != e; ++i) {
184 if (CurRec->isSubClassOf(SCs[i]))
185 return Error(SubClass.RefLoc,
186 "Already subclass of '" + SCs[i]->getName() + "'!\n");
187 CurRec->addSuperClass(SCs[i]);
190 if (CurRec->isSubClassOf(SC))
191 return Error(SubClass.RefLoc,
192 "Already subclass of '" + SC->getName() + "'!\n");
193 CurRec->addSuperClass(SC);
197 /// AddSubMultiClass - Add SubMultiClass as a subclass to
198 /// CurMC, resolving its template args as SubMultiClass's
199 /// template arguments.
200 bool TGParser::AddSubMultiClass(MultiClass *CurMC,
201 SubMultiClassReference &SubMultiClass) {
202 MultiClass *SMC = SubMultiClass.MC;
203 Record *CurRec = &CurMC->Rec;
205 const std::vector<RecordVal> &MCVals = CurRec->getValues();
207 // Add all of the values in the subclass into the current class.
208 const std::vector<RecordVal> &SMCVals = SMC->Rec.getValues();
209 for (unsigned i = 0, e = SMCVals.size(); i != e; ++i)
210 if (AddValue(CurRec, SubMultiClass.RefLoc, SMCVals[i]))
213 int newDefStart = CurMC->DefPrototypes.size();
215 // Add all of the defs in the subclass into the current multiclass.
216 for (MultiClass::RecordVector::const_iterator i = SMC->DefPrototypes.begin(),
217 iend = SMC->DefPrototypes.end();
220 // Clone the def and add it to the current multiclass
221 Record *NewDef = new Record(**i);
223 // Add all of the values in the superclass into the current def.
224 for (unsigned i = 0, e = MCVals.size(); i != e; ++i)
225 if (AddValue(NewDef, SubMultiClass.RefLoc, MCVals[i]))
228 CurMC->DefPrototypes.push_back(NewDef);
231 const std::vector<std::string> &SMCTArgs = SMC->Rec.getTemplateArgs();
233 // Ensure that an appropriate number of template arguments are
235 if (SMCTArgs.size() < SubMultiClass.TemplateArgs.size())
236 return Error(SubMultiClass.RefLoc,
237 "More template args specified than expected");
239 // Loop over all of the template arguments, setting them to the specified
240 // value or leaving them as the default if necessary.
241 for (unsigned i = 0, e = SMCTArgs.size(); i != e; ++i) {
242 if (i < SubMultiClass.TemplateArgs.size()) {
243 // If a value is specified for this template arg, set it in the
245 if (SetValue(CurRec, SubMultiClass.RefLoc, SMCTArgs[i],
246 std::vector<unsigned>(),
247 SubMultiClass.TemplateArgs[i]))
251 CurRec->resolveReferencesTo(CurRec->getValue(SMCTArgs[i]));
254 CurRec->removeValue(SMCTArgs[i]);
256 // If a value is specified for this template arg, set it in the
258 for (MultiClass::RecordVector::iterator j =
259 CurMC->DefPrototypes.begin() + newDefStart,
260 jend = CurMC->DefPrototypes.end();
265 if (SetValue(Def, SubMultiClass.RefLoc, SMCTArgs[i],
266 std::vector<unsigned>(),
267 SubMultiClass.TemplateArgs[i]))
271 Def->resolveReferencesTo(Def->getValue(SMCTArgs[i]));
274 Def->removeValue(SMCTArgs[i]);
276 } else if (!CurRec->getValue(SMCTArgs[i])->getValue()->isComplete()) {
277 return Error(SubMultiClass.RefLoc,
278 "Value not specified for template argument #"
279 + utostr(i) + " (" + SMCTArgs[i] + ") of subclass '" +
280 SMC->Rec.getName() + "'!");
287 //===----------------------------------------------------------------------===//
289 //===----------------------------------------------------------------------===//
291 /// isObjectStart - Return true if this is a valid first token for an Object.
292 static bool isObjectStart(tgtok::TokKind K) {
293 return K == tgtok::Class || K == tgtok::Def ||
294 K == tgtok::Defm || K == tgtok::Let || K == tgtok::MultiClass;
297 /// ParseObjectName - If an object name is specified, return it. Otherwise,
298 /// return an anonymous name.
299 /// ObjectName ::= ID
300 /// ObjectName ::= /*empty*/
302 std::string TGParser::ParseObjectName() {
303 if (Lex.getCode() == tgtok::Id) {
304 std::string Ret = Lex.getCurStrVal();
309 static unsigned AnonCounter = 0;
310 return "anonymous."+utostr(AnonCounter++);
314 /// ParseClassID - Parse and resolve a reference to a class name. This returns
319 Record *TGParser::ParseClassID() {
320 if (Lex.getCode() != tgtok::Id) {
321 TokError("expected name for ClassID");
325 Record *Result = Records.getClass(Lex.getCurStrVal());
327 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
333 /// ParseMultiClassID - Parse and resolve a reference to a multiclass name.
334 /// This returns null on error.
336 /// MultiClassID ::= ID
338 MultiClass *TGParser::ParseMultiClassID() {
339 if (Lex.getCode() != tgtok::Id) {
340 TokError("expected name for ClassID");
344 MultiClass *Result = MultiClasses[Lex.getCurStrVal()];
346 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
352 Record *TGParser::ParseDefmID() {
353 if (Lex.getCode() != tgtok::Id) {
354 TokError("expected multiclass name");
358 MultiClass *MC = MultiClasses[Lex.getCurStrVal()];
360 TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
370 /// ParseSubClassReference - Parse a reference to a subclass or to a templated
371 /// subclass. This returns a SubClassRefTy with a null Record* on error.
373 /// SubClassRef ::= ClassID
374 /// SubClassRef ::= ClassID '<' ValueList '>'
376 SubClassReference TGParser::
377 ParseSubClassReference(Record *CurRec, bool isDefm) {
378 SubClassReference Result;
379 Result.RefLoc = Lex.getLoc();
382 Result.Rec = ParseDefmID();
384 Result.Rec = ParseClassID();
385 if (Result.Rec == 0) return Result;
387 // If there is no template arg list, we're done.
388 if (Lex.getCode() != tgtok::less)
390 Lex.Lex(); // Eat the '<'
392 if (Lex.getCode() == tgtok::greater) {
393 TokError("subclass reference requires a non-empty list of template values");
398 Result.TemplateArgs = ParseValueList(CurRec, Result.Rec);
399 if (Result.TemplateArgs.empty()) {
400 Result.Rec = 0; // Error parsing value list.
404 if (Lex.getCode() != tgtok::greater) {
405 TokError("expected '>' in template value list");
414 /// ParseSubMultiClassReference - Parse a reference to a subclass or to a
415 /// templated submulticlass. This returns a SubMultiClassRefTy with a null
416 /// Record* on error.
418 /// SubMultiClassRef ::= MultiClassID
419 /// SubMultiClassRef ::= MultiClassID '<' ValueList '>'
421 SubMultiClassReference TGParser::
422 ParseSubMultiClassReference(MultiClass *CurMC) {
423 SubMultiClassReference Result;
424 Result.RefLoc = Lex.getLoc();
426 Result.MC = ParseMultiClassID();
427 if (Result.MC == 0) return Result;
429 // If there is no template arg list, we're done.
430 if (Lex.getCode() != tgtok::less)
432 Lex.Lex(); // Eat the '<'
434 if (Lex.getCode() == tgtok::greater) {
435 TokError("subclass reference requires a non-empty list of template values");
440 Result.TemplateArgs = ParseValueList(&CurMC->Rec, &Result.MC->Rec);
441 if (Result.TemplateArgs.empty()) {
442 Result.MC = 0; // Error parsing value list.
446 if (Lex.getCode() != tgtok::greater) {
447 TokError("expected '>' in template value list");
456 /// ParseRangePiece - Parse a bit/value range.
457 /// RangePiece ::= INTVAL
458 /// RangePiece ::= INTVAL '-' INTVAL
459 /// RangePiece ::= INTVAL INTVAL
460 bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
461 if (Lex.getCode() != tgtok::IntVal) {
462 TokError("expected integer or bitrange");
465 int64_t Start = Lex.getCurIntVal();
469 return TokError("invalid range, cannot be negative");
471 switch (Lex.Lex()) { // eat first character.
473 Ranges.push_back(Start);
476 if (Lex.Lex() != tgtok::IntVal) {
477 TokError("expected integer value as end of range");
480 End = Lex.getCurIntVal();
483 End = -Lex.getCurIntVal();
487 return TokError("invalid range, cannot be negative");
492 for (; Start <= End; ++Start)
493 Ranges.push_back(Start);
495 for (; Start >= End; --Start)
496 Ranges.push_back(Start);
501 /// ParseRangeList - Parse a list of scalars and ranges into scalar values.
503 /// RangeList ::= RangePiece (',' RangePiece)*
505 std::vector<unsigned> TGParser::ParseRangeList() {
506 std::vector<unsigned> Result;
508 // Parse the first piece.
509 if (ParseRangePiece(Result))
510 return std::vector<unsigned>();
511 while (Lex.getCode() == tgtok::comma) {
512 Lex.Lex(); // Eat the comma.
514 // Parse the next range piece.
515 if (ParseRangePiece(Result))
516 return std::vector<unsigned>();
521 /// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
522 /// OptionalRangeList ::= '<' RangeList '>'
523 /// OptionalRangeList ::= /*empty*/
524 bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
525 if (Lex.getCode() != tgtok::less)
528 SMLoc StartLoc = Lex.getLoc();
529 Lex.Lex(); // eat the '<'
531 // Parse the range list.
532 Ranges = ParseRangeList();
533 if (Ranges.empty()) return true;
535 if (Lex.getCode() != tgtok::greater) {
536 TokError("expected '>' at end of range list");
537 return Error(StartLoc, "to match this '<'");
539 Lex.Lex(); // eat the '>'.
543 /// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
544 /// OptionalBitList ::= '{' RangeList '}'
545 /// OptionalBitList ::= /*empty*/
546 bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
547 if (Lex.getCode() != tgtok::l_brace)
550 SMLoc StartLoc = Lex.getLoc();
551 Lex.Lex(); // eat the '{'
553 // Parse the range list.
554 Ranges = ParseRangeList();
555 if (Ranges.empty()) return true;
557 if (Lex.getCode() != tgtok::r_brace) {
558 TokError("expected '}' at end of bit list");
559 return Error(StartLoc, "to match this '{'");
561 Lex.Lex(); // eat the '}'.
566 /// ParseType - Parse and return a tblgen type. This returns null on error.
568 /// Type ::= STRING // string type
569 /// Type ::= BIT // bit type
570 /// Type ::= BITS '<' INTVAL '>' // bits<x> type
571 /// Type ::= INT // int type
572 /// Type ::= LIST '<' Type '>' // list<x> type
573 /// Type ::= CODE // code type
574 /// Type ::= DAG // dag type
575 /// Type ::= ClassID // Record Type
577 RecTy *TGParser::ParseType() {
578 switch (Lex.getCode()) {
579 default: TokError("Unknown token when expecting a type"); return 0;
580 case tgtok::String: Lex.Lex(); return new StringRecTy();
581 case tgtok::Bit: Lex.Lex(); return new BitRecTy();
582 case tgtok::Int: Lex.Lex(); return new IntRecTy();
583 case tgtok::Code: Lex.Lex(); return new CodeRecTy();
584 case tgtok::Dag: Lex.Lex(); return new DagRecTy();
586 if (Record *R = ParseClassID()) return new RecordRecTy(R);
589 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
590 TokError("expected '<' after bits type");
593 if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
594 TokError("expected integer in bits<n> type");
597 uint64_t Val = Lex.getCurIntVal();
598 if (Lex.Lex() != tgtok::greater) { // Eat count.
599 TokError("expected '>' at end of bits<n> type");
602 Lex.Lex(); // Eat '>'
603 return new BitsRecTy(Val);
606 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
607 TokError("expected '<' after list type");
610 Lex.Lex(); // Eat '<'
611 RecTy *SubType = ParseType();
612 if (SubType == 0) return 0;
614 if (Lex.getCode() != tgtok::greater) {
615 TokError("expected '>' at end of list<ty> type");
618 Lex.Lex(); // Eat '>'
619 return new ListRecTy(SubType);
624 /// ParseIDValue - Parse an ID as a value and decode what it means.
626 /// IDValue ::= ID [def local value]
627 /// IDValue ::= ID [def template arg]
628 /// IDValue ::= ID [multiclass local value]
629 /// IDValue ::= ID [multiclass template argument]
630 /// IDValue ::= ID [def name]
632 Init *TGParser::ParseIDValue(Record *CurRec) {
633 assert(Lex.getCode() == tgtok::Id && "Expected ID in ParseIDValue");
634 std::string Name = Lex.getCurStrVal();
635 SMLoc Loc = Lex.getLoc();
637 return ParseIDValue(CurRec, Name, Loc);
640 /// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
641 /// has already been read.
642 Init *TGParser::ParseIDValue(Record *CurRec,
643 const std::string &Name, SMLoc NameLoc) {
645 if (const RecordVal *RV = CurRec->getValue(Name))
646 return new VarInit(Name, RV->getType());
648 std::string TemplateArgName = CurRec->getName()+":"+Name;
649 if (CurRec->isTemplateArg(TemplateArgName)) {
650 const RecordVal *RV = CurRec->getValue(TemplateArgName);
651 assert(RV && "Template arg doesn't exist??");
652 return new VarInit(TemplateArgName, RV->getType());
657 std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
658 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
659 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
660 assert(RV && "Template arg doesn't exist??");
661 return new VarInit(MCName, RV->getType());
665 if (Record *D = Records.getDef(Name))
666 return new DefInit(D);
668 Error(NameLoc, "Variable not defined: '" + Name + "'");
672 /// ParseOperation - Parse an operator. This returns null on error.
674 /// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
676 Init *TGParser::ParseOperation(Record *CurRec) {
677 switch (Lex.getCode()) {
679 TokError("unknown operation");
685 case tgtok::XCast: { // Value ::= !unop '(' Value ')'
686 UnOpInit::UnaryOp Code;
689 switch (Lex.getCode()) {
690 default: assert(0 && "Unhandled code!");
692 Lex.Lex(); // eat the operation
693 Code = UnOpInit::CAST;
695 Type = ParseOperatorType();
698 TokError("did not get type for unary operator");
704 Lex.Lex(); // eat the operation
705 Code = UnOpInit::CAR;
708 Lex.Lex(); // eat the operation
709 Code = UnOpInit::CDR;
712 Lex.Lex(); // eat the operation
713 Code = UnOpInit::LNULL;
717 if (Lex.getCode() != tgtok::l_paren) {
718 TokError("expected '(' after unary operator");
721 Lex.Lex(); // eat the '('
723 Init *LHS = ParseValue(CurRec);
724 if (LHS == 0) return 0;
726 if (Code == UnOpInit::CAR
727 || Code == UnOpInit::CDR
728 || Code == UnOpInit::LNULL) {
729 ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
730 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
731 TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
732 if (LHSl == 0 && LHSs == 0 && LHSt == 0) {
733 TokError("expected list or string type argument in unary operator");
737 ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
738 StringRecTy *SType = dynamic_cast<StringRecTy*>(LHSt->getType());
739 if (LType == 0 && SType == 0) {
740 TokError("expected list or string type argumnet in unary operator");
745 if (Code == UnOpInit::CAR
746 || Code == UnOpInit::CDR) {
747 if (LHSl == 0 && LHSt == 0) {
748 TokError("expected list type argumnet in unary operator");
752 if (LHSl && LHSl->getSize() == 0) {
753 TokError("empty list argument in unary operator");
757 Init *Item = LHSl->getElement(0);
758 TypedInit *Itemt = dynamic_cast<TypedInit*>(Item);
760 TokError("untyped list element in unary operator");
763 if (Code == UnOpInit::CAR) {
764 Type = Itemt->getType();
767 Type = new ListRecTy(Itemt->getType());
771 assert(LHSt && "expected list type argument in unary operator");
772 ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
774 TokError("expected list type argumnet in unary operator");
777 if (Code == UnOpInit::CAR) {
778 Type = LType->getElementType();
787 if (Lex.getCode() != tgtok::r_paren) {
788 TokError("expected ')' in unary operator");
791 Lex.Lex(); // eat the ')'
792 return (new UnOpInit(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
799 case tgtok::XStrConcat:
800 case tgtok::XNameConcat: { // Value ::= !binop '(' Value ',' Value ')'
801 BinOpInit::BinaryOp Code;
805 switch (Lex.getCode()) {
806 default: assert(0 && "Unhandled code!");
808 Lex.Lex(); // eat the operation
809 Code = BinOpInit::CONCAT;
810 Type = new DagRecTy();
813 Lex.Lex(); // eat the operation
814 Code = BinOpInit::SRA;
815 Type = new IntRecTy();
818 Lex.Lex(); // eat the operation
819 Code = BinOpInit::SRL;
820 Type = new IntRecTy();
823 Lex.Lex(); // eat the operation
824 Code = BinOpInit::SHL;
825 Type = new IntRecTy();
827 case tgtok::XStrConcat:
828 Lex.Lex(); // eat the operation
829 Code = BinOpInit::STRCONCAT;
830 Type = new StringRecTy();
832 case tgtok::XNameConcat:
833 Lex.Lex(); // eat the operation
834 Code = BinOpInit::NAMECONCAT;
836 Type = ParseOperatorType();
839 TokError("did not get type for binary operator");
845 if (Lex.getCode() != tgtok::l_paren) {
846 TokError("expected '(' after binary operator");
849 Lex.Lex(); // eat the '('
851 Init *LHS = ParseValue(CurRec);
852 if (LHS == 0) return 0;
854 if (Lex.getCode() != tgtok::comma) {
855 TokError("expected ',' in binary operator");
858 Lex.Lex(); // eat the ','
860 Init *RHS = ParseValue(CurRec);
861 if (RHS == 0) return 0;
863 if (Lex.getCode() != tgtok::r_paren) {
864 TokError("expected ')' in binary operator");
867 Lex.Lex(); // eat the ')'
868 return (new BinOpInit(Code, LHS, RHS, Type))->Fold(CurRec, CurMultiClass);
872 case tgtok::XForEach:
873 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
874 TernOpInit::TernaryOp Code;
878 tgtok::TokKind LexCode = Lex.getCode();
879 Lex.Lex(); // eat the operation
881 default: assert(0 && "Unhandled code!");
883 Code = TernOpInit::IF;
885 case tgtok::XForEach:
886 Code = TernOpInit::FOREACH;
889 Code = TernOpInit::SUBST;
892 if (Lex.getCode() != tgtok::l_paren) {
893 TokError("expected '(' after ternary operator");
896 Lex.Lex(); // eat the '('
898 Init *LHS = ParseValue(CurRec);
899 if (LHS == 0) return 0;
901 if (Lex.getCode() != tgtok::comma) {
902 TokError("expected ',' in ternary operator");
905 Lex.Lex(); // eat the ','
907 Init *MHS = ParseValue(CurRec);
908 if (MHS == 0) return 0;
910 if (Lex.getCode() != tgtok::comma) {
911 TokError("expected ',' in ternary operator");
914 Lex.Lex(); // eat the ','
916 Init *RHS = ParseValue(CurRec);
917 if (RHS == 0) return 0;
919 if (Lex.getCode() != tgtok::r_paren) {
920 TokError("expected ')' in binary operator");
923 Lex.Lex(); // eat the ')'
926 default: assert(0 && "Unhandled code!");
928 TypedInit *MHSt = dynamic_cast<TypedInit *>(MHS);
929 TypedInit *RHSt = dynamic_cast<TypedInit *>(RHS);
930 if (MHSt == 0 || RHSt == 0) {
931 TokError("could not get type for !if");
934 if (MHSt->getType()->typeIsConvertibleTo(RHSt->getType())) {
935 Type = RHSt->getType();
937 else if (RHSt->getType()->typeIsConvertibleTo(MHSt->getType())) {
938 Type = MHSt->getType();
941 TokError("inconsistent types for !if");
946 case tgtok::XForEach: {
947 TypedInit *MHSt = dynamic_cast<TypedInit *>(MHS);
949 TokError("could not get type for !foreach");
952 Type = MHSt->getType();
955 case tgtok::XSubst: {
956 TypedInit *RHSt = dynamic_cast<TypedInit *>(RHS);
958 TokError("could not get type for !subst");
961 Type = RHSt->getType();
965 return (new TernOpInit(Code, LHS, MHS, RHS, Type))->Fold(CurRec, CurMultiClass);
968 TokError("could not parse operation");
972 /// ParseOperatorType - Parse a type for an operator. This returns
975 /// OperatorType ::= '<' Type '>'
977 RecTy *TGParser::ParseOperatorType(void) {
980 if (Lex.getCode() != tgtok::less) {
981 TokError("expected type name for operator");
984 Lex.Lex(); // eat the <
989 TokError("expected type name for operator");
993 if (Lex.getCode() != tgtok::greater) {
994 TokError("expected type name for operator");
997 Lex.Lex(); // eat the >
1003 /// ParseSimpleValue - Parse a tblgen value. This returns null on error.
1005 /// SimpleValue ::= IDValue
1006 /// SimpleValue ::= INTVAL
1007 /// SimpleValue ::= STRVAL+
1008 /// SimpleValue ::= CODEFRAGMENT
1009 /// SimpleValue ::= '?'
1010 /// SimpleValue ::= '{' ValueList '}'
1011 /// SimpleValue ::= ID '<' ValueListNE '>'
1012 /// SimpleValue ::= '[' ValueList ']'
1013 /// SimpleValue ::= '(' IDValue DagArgList ')'
1014 /// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
1015 /// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
1016 /// SimpleValue ::= SRATOK '(' Value ',' Value ')'
1017 /// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
1018 /// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
1020 Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType) {
1022 switch (Lex.getCode()) {
1023 default: TokError("Unknown token when parsing a value"); break;
1024 case tgtok::IntVal: R = new IntInit(Lex.getCurIntVal()); Lex.Lex(); break;
1025 case tgtok::StrVal: {
1026 std::string Val = Lex.getCurStrVal();
1029 // Handle multiple consecutive concatenated strings.
1030 while (Lex.getCode() == tgtok::StrVal) {
1031 Val += Lex.getCurStrVal();
1035 R = new StringInit(Val);
1038 case tgtok::CodeFragment:
1039 R = new CodeInit(Lex.getCurStrVal()); Lex.Lex(); break;
1040 case tgtok::question: R = new UnsetInit(); Lex.Lex(); break;
1042 SMLoc NameLoc = Lex.getLoc();
1043 std::string Name = Lex.getCurStrVal();
1044 if (Lex.Lex() != tgtok::less) // consume the Id.
1045 return ParseIDValue(CurRec, Name, NameLoc); // Value ::= IDValue
1047 // Value ::= ID '<' ValueListNE '>'
1048 if (Lex.Lex() == tgtok::greater) {
1049 TokError("expected non-empty value list");
1053 // This is a CLASS<initvalslist> expression. This is supposed to synthesize
1054 // a new anonymous definition, deriving from CLASS<initvalslist> with no
1056 Record *Class = Records.getClass(Name);
1058 Error(NameLoc, "Expected a class name, got '" + Name + "'");
1062 std::vector<Init*> ValueList = ParseValueList(CurRec, Class);
1063 if (ValueList.empty()) return 0;
1065 if (Lex.getCode() != tgtok::greater) {
1066 TokError("expected '>' at end of value list");
1069 Lex.Lex(); // eat the '>'
1071 // Create the new record, set it as CurRec temporarily.
1072 static unsigned AnonCounter = 0;
1073 Record *NewRec = new Record("anonymous.val."+utostr(AnonCounter++),NameLoc);
1074 SubClassReference SCRef;
1075 SCRef.RefLoc = NameLoc;
1077 SCRef.TemplateArgs = ValueList;
1078 // Add info about the subclass to NewRec.
1079 if (AddSubClass(NewRec, SCRef))
1081 NewRec->resolveReferences();
1082 Records.addDef(NewRec);
1084 // The result of the expression is a reference to the new record.
1085 return new DefInit(NewRec);
1087 case tgtok::l_brace: { // Value ::= '{' ValueList '}'
1088 SMLoc BraceLoc = Lex.getLoc();
1089 Lex.Lex(); // eat the '{'
1090 std::vector<Init*> Vals;
1092 if (Lex.getCode() != tgtok::r_brace) {
1093 Vals = ParseValueList(CurRec);
1094 if (Vals.empty()) return 0;
1096 if (Lex.getCode() != tgtok::r_brace) {
1097 TokError("expected '}' at end of bit list value");
1100 Lex.Lex(); // eat the '}'
1102 BitsInit *Result = new BitsInit(Vals.size());
1103 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1104 Init *Bit = Vals[i]->convertInitializerTo(new BitRecTy());
1106 Error(BraceLoc, "Element #" + utostr(i) + " (" + Vals[i]->getAsString()+
1107 ") is not convertable to a bit");
1110 Result->setBit(Vals.size()-i-1, Bit);
1114 case tgtok::l_square: { // Value ::= '[' ValueList ']'
1115 Lex.Lex(); // eat the '['
1116 std::vector<Init*> Vals;
1118 RecTy *DeducedEltTy = 0;
1119 ListRecTy *GivenListTy = 0;
1121 if (ItemType != 0) {
1122 ListRecTy *ListType = dynamic_cast<ListRecTy*>(ItemType);
1123 if (ListType == 0) {
1124 std::stringstream s;
1125 s << "Type mismatch for list, expected list type, got "
1126 << ItemType->getAsString();
1129 GivenListTy = ListType;
1132 if (Lex.getCode() != tgtok::r_square) {
1133 Vals = ParseValueList(CurRec, 0, GivenListTy ? GivenListTy->getElementType() : 0);
1134 if (Vals.empty()) return 0;
1136 if (Lex.getCode() != tgtok::r_square) {
1137 TokError("expected ']' at end of list value");
1140 Lex.Lex(); // eat the ']'
1142 RecTy *GivenEltTy = 0;
1143 if (Lex.getCode() == tgtok::less) {
1144 // Optional list element type
1145 Lex.Lex(); // eat the '<'
1147 GivenEltTy = ParseType();
1148 if (GivenEltTy == 0) {
1149 // Couldn't parse element type
1153 if (Lex.getCode() != tgtok::greater) {
1154 TokError("expected '>' at end of list element type");
1157 Lex.Lex(); // eat the '>'
1162 for (std::vector<Init *>::iterator i = Vals.begin(), ie = Vals.end();
1165 TypedInit *TArg = dynamic_cast<TypedInit*>(*i);
1167 TokError("Untyped list element");
1171 EltTy = resolveTypes(EltTy, TArg->getType());
1173 TokError("Incompatible types in list elements");
1178 EltTy = TArg->getType();
1182 if (GivenEltTy != 0) {
1184 // Verify consistency
1185 if (!EltTy->typeIsConvertibleTo(GivenEltTy)) {
1186 TokError("Incompatible types in list elements");
1194 if (ItemType == 0) {
1195 TokError("No type for list");
1198 DeducedEltTy = GivenListTy->getElementType();
1201 // Make sure the deduced type is compatible with the given type
1203 if (!EltTy->typeIsConvertibleTo(GivenListTy->getElementType())) {
1204 TokError("Element type mismatch for list");
1208 DeducedEltTy = EltTy;
1211 return new ListInit(Vals, DeducedEltTy);
1213 case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
1214 Lex.Lex(); // eat the '('
1215 if (Lex.getCode() != tgtok::Id
1216 && Lex.getCode() != tgtok::XCast
1217 && Lex.getCode() != tgtok::XNameConcat) {
1218 TokError("expected identifier in dag init");
1223 if (Lex.getCode() == tgtok::Id) {
1224 Operator = ParseIDValue(CurRec);
1225 if (Operator == 0) return 0;
1228 Operator = ParseOperation(CurRec);
1229 if (Operator == 0) return 0;
1232 // If the operator name is present, parse it.
1233 std::string OperatorName;
1234 if (Lex.getCode() == tgtok::colon) {
1235 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1236 TokError("expected variable name in dag operator");
1239 OperatorName = Lex.getCurStrVal();
1240 Lex.Lex(); // eat the VarName.
1243 std::vector<std::pair<llvm::Init*, std::string> > DagArgs;
1244 if (Lex.getCode() != tgtok::r_paren) {
1245 DagArgs = ParseDagArgList(CurRec);
1246 if (DagArgs.empty()) return 0;
1249 if (Lex.getCode() != tgtok::r_paren) {
1250 TokError("expected ')' in dag init");
1253 Lex.Lex(); // eat the ')'
1255 return new DagInit(Operator, OperatorName, DagArgs);
1262 case tgtok::XCast: // Value ::= !unop '(' Value ')'
1263 case tgtok::XConcat:
1267 case tgtok::XStrConcat:
1268 case tgtok::XNameConcat: // Value ::= !binop '(' Value ',' Value ')'
1270 case tgtok::XForEach:
1271 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
1272 return ParseOperation(CurRec);
1280 /// ParseValue - Parse a tblgen value. This returns null on error.
1282 /// Value ::= SimpleValue ValueSuffix*
1283 /// ValueSuffix ::= '{' BitList '}'
1284 /// ValueSuffix ::= '[' BitList ']'
1285 /// ValueSuffix ::= '.' ID
1287 Init *TGParser::ParseValue(Record *CurRec, RecTy *ItemType) {
1288 Init *Result = ParseSimpleValue(CurRec, ItemType);
1289 if (Result == 0) return 0;
1291 // Parse the suffixes now if present.
1293 switch (Lex.getCode()) {
1294 default: return Result;
1295 case tgtok::l_brace: {
1296 SMLoc CurlyLoc = Lex.getLoc();
1297 Lex.Lex(); // eat the '{'
1298 std::vector<unsigned> Ranges = ParseRangeList();
1299 if (Ranges.empty()) return 0;
1301 // Reverse the bitlist.
1302 std::reverse(Ranges.begin(), Ranges.end());
1303 Result = Result->convertInitializerBitRange(Ranges);
1305 Error(CurlyLoc, "Invalid bit range for value");
1310 if (Lex.getCode() != tgtok::r_brace) {
1311 TokError("expected '}' at end of bit range list");
1317 case tgtok::l_square: {
1318 SMLoc SquareLoc = Lex.getLoc();
1319 Lex.Lex(); // eat the '['
1320 std::vector<unsigned> Ranges = ParseRangeList();
1321 if (Ranges.empty()) return 0;
1323 Result = Result->convertInitListSlice(Ranges);
1325 Error(SquareLoc, "Invalid range for list slice");
1330 if (Lex.getCode() != tgtok::r_square) {
1331 TokError("expected ']' at end of list slice");
1338 if (Lex.Lex() != tgtok::Id) { // eat the .
1339 TokError("expected field identifier after '.'");
1342 if (!Result->getFieldType(Lex.getCurStrVal())) {
1343 TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
1344 Result->getAsString() + "'");
1347 Result = new FieldInit(Result, Lex.getCurStrVal());
1348 Lex.Lex(); // eat field name
1354 /// ParseDagArgList - Parse the argument list for a dag literal expression.
1356 /// ParseDagArgList ::= Value (':' VARNAME)?
1357 /// ParseDagArgList ::= ParseDagArgList ',' Value (':' VARNAME)?
1358 std::vector<std::pair<llvm::Init*, std::string> >
1359 TGParser::ParseDagArgList(Record *CurRec) {
1360 std::vector<std::pair<llvm::Init*, std::string> > Result;
1363 Init *Val = ParseValue(CurRec);
1364 if (Val == 0) return std::vector<std::pair<llvm::Init*, std::string> >();
1366 // If the variable name is present, add it.
1367 std::string VarName;
1368 if (Lex.getCode() == tgtok::colon) {
1369 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1370 TokError("expected variable name in dag literal");
1371 return std::vector<std::pair<llvm::Init*, std::string> >();
1373 VarName = Lex.getCurStrVal();
1374 Lex.Lex(); // eat the VarName.
1377 Result.push_back(std::make_pair(Val, VarName));
1379 if (Lex.getCode() != tgtok::comma) break;
1380 Lex.Lex(); // eat the ','
1387 /// ParseValueList - Parse a comma separated list of values, returning them as a
1388 /// vector. Note that this always expects to be able to parse at least one
1389 /// value. It returns an empty list if this is not possible.
1391 /// ValueList ::= Value (',' Value)
1393 std::vector<Init*> TGParser::ParseValueList(Record *CurRec, Record *ArgsRec, RecTy *EltTy) {
1394 std::vector<Init*> Result;
1395 RecTy *ItemType = EltTy;
1396 unsigned int ArgN = 0;
1397 if (ArgsRec != 0 && EltTy == 0) {
1398 const std::vector<std::string> &TArgs = ArgsRec->getTemplateArgs();
1399 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1400 assert(RV && "Template argument record not found??");
1401 ItemType = RV->getType();
1404 Result.push_back(ParseValue(CurRec, ItemType));
1405 if (Result.back() == 0) return std::vector<Init*>();
1407 while (Lex.getCode() == tgtok::comma) {
1408 Lex.Lex(); // Eat the comma
1410 if (ArgsRec != 0 && EltTy == 0) {
1411 const std::vector<std::string> &TArgs = ArgsRec->getTemplateArgs();
1412 if (ArgN >= TArgs.size()) {
1413 TokError("too many template arguments");
1414 return std::vector<Init*>();
1416 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1417 assert(RV && "Template argument record not found??");
1418 ItemType = RV->getType();
1421 Result.push_back(ParseValue(CurRec, ItemType));
1422 if (Result.back() == 0) return std::vector<Init*>();
1430 /// ParseDeclaration - Read a declaration, returning the name of field ID, or an
1431 /// empty string on error. This can happen in a number of different context's,
1432 /// including within a def or in the template args for a def (which which case
1433 /// CurRec will be non-null) and within the template args for a multiclass (in
1434 /// which case CurRec will be null, but CurMultiClass will be set). This can
1435 /// also happen within a def that is within a multiclass, which will set both
1436 /// CurRec and CurMultiClass.
1438 /// Declaration ::= FIELD? Type ID ('=' Value)?
1440 std::string TGParser::ParseDeclaration(Record *CurRec,
1441 bool ParsingTemplateArgs) {
1442 // Read the field prefix if present.
1443 bool HasField = Lex.getCode() == tgtok::Field;
1444 if (HasField) Lex.Lex();
1446 RecTy *Type = ParseType();
1447 if (Type == 0) return "";
1449 if (Lex.getCode() != tgtok::Id) {
1450 TokError("Expected identifier in declaration");
1454 SMLoc IdLoc = Lex.getLoc();
1455 std::string DeclName = Lex.getCurStrVal();
1458 if (ParsingTemplateArgs) {
1460 DeclName = CurRec->getName() + ":" + DeclName;
1462 assert(CurMultiClass);
1465 DeclName = CurMultiClass->Rec.getName() + "::" + DeclName;
1469 if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
1472 // If a value is present, parse it.
1473 if (Lex.getCode() == tgtok::equal) {
1475 SMLoc ValLoc = Lex.getLoc();
1476 Init *Val = ParseValue(CurRec, Type);
1478 SetValue(CurRec, ValLoc, DeclName, std::vector<unsigned>(), Val))
1485 /// ParseTemplateArgList - Read a template argument list, which is a non-empty
1486 /// sequence of template-declarations in <>'s. If CurRec is non-null, these are
1487 /// template args for a def, which may or may not be in a multiclass. If null,
1488 /// these are the template args for a multiclass.
1490 /// TemplateArgList ::= '<' Declaration (',' Declaration)* '>'
1492 bool TGParser::ParseTemplateArgList(Record *CurRec) {
1493 assert(Lex.getCode() == tgtok::less && "Not a template arg list!");
1494 Lex.Lex(); // eat the '<'
1496 Record *TheRecToAddTo = CurRec ? CurRec : &CurMultiClass->Rec;
1498 // Read the first declaration.
1499 std::string TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1500 if (TemplArg.empty())
1503 TheRecToAddTo->addTemplateArg(TemplArg);
1505 while (Lex.getCode() == tgtok::comma) {
1506 Lex.Lex(); // eat the ','
1508 // Read the following declarations.
1509 TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1510 if (TemplArg.empty())
1512 TheRecToAddTo->addTemplateArg(TemplArg);
1515 if (Lex.getCode() != tgtok::greater)
1516 return TokError("expected '>' at end of template argument list");
1517 Lex.Lex(); // eat the '>'.
1522 /// ParseBodyItem - Parse a single item at within the body of a def or class.
1524 /// BodyItem ::= Declaration ';'
1525 /// BodyItem ::= LET ID OptionalBitList '=' Value ';'
1526 bool TGParser::ParseBodyItem(Record *CurRec) {
1527 if (Lex.getCode() != tgtok::Let) {
1528 if (ParseDeclaration(CurRec, false).empty())
1531 if (Lex.getCode() != tgtok::semi)
1532 return TokError("expected ';' after declaration");
1537 // LET ID OptionalRangeList '=' Value ';'
1538 if (Lex.Lex() != tgtok::Id)
1539 return TokError("expected field identifier after let");
1541 SMLoc IdLoc = Lex.getLoc();
1542 std::string FieldName = Lex.getCurStrVal();
1543 Lex.Lex(); // eat the field name.
1545 std::vector<unsigned> BitList;
1546 if (ParseOptionalBitList(BitList))
1548 std::reverse(BitList.begin(), BitList.end());
1550 if (Lex.getCode() != tgtok::equal)
1551 return TokError("expected '=' in let expression");
1552 Lex.Lex(); // eat the '='.
1554 RecordVal *Field = CurRec->getValue(FieldName);
1556 return TokError("Value '" + FieldName + "' unknown!");
1558 RecTy *Type = Field->getType();
1560 Init *Val = ParseValue(CurRec, Type);
1561 if (Val == 0) return true;
1563 if (Lex.getCode() != tgtok::semi)
1564 return TokError("expected ';' after let expression");
1567 return SetValue(CurRec, IdLoc, FieldName, BitList, Val);
1570 /// ParseBody - Read the body of a class or def. Return true on error, false on
1574 /// Body ::= '{' BodyList '}'
1575 /// BodyList BodyItem*
1577 bool TGParser::ParseBody(Record *CurRec) {
1578 // If this is a null definition, just eat the semi and return.
1579 if (Lex.getCode() == tgtok::semi) {
1584 if (Lex.getCode() != tgtok::l_brace)
1585 return TokError("Expected ';' or '{' to start body");
1589 while (Lex.getCode() != tgtok::r_brace)
1590 if (ParseBodyItem(CurRec))
1598 /// ParseObjectBody - Parse the body of a def or class. This consists of an
1599 /// optional ClassList followed by a Body. CurRec is the current def or class
1600 /// that is being parsed.
1602 /// ObjectBody ::= BaseClassList Body
1603 /// BaseClassList ::= /*empty*/
1604 /// BaseClassList ::= ':' BaseClassListNE
1605 /// BaseClassListNE ::= SubClassRef (',' SubClassRef)*
1607 bool TGParser::ParseObjectBody(Record *CurRec) {
1608 // If there is a baseclass list, read it.
1609 if (Lex.getCode() == tgtok::colon) {
1612 // Read all of the subclasses.
1613 SubClassReference SubClass = ParseSubClassReference(CurRec, false);
1616 if (SubClass.Rec == 0) return true;
1619 if (AddSubClass(CurRec, SubClass))
1622 if (Lex.getCode() != tgtok::comma) break;
1623 Lex.Lex(); // eat ','.
1624 SubClass = ParseSubClassReference(CurRec, false);
1628 // Process any variables on the let stack.
1629 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1630 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1631 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1632 LetStack[i][j].Bits, LetStack[i][j].Value))
1635 return ParseBody(CurRec);
1639 /// ParseDef - Parse and return a top level or multiclass def, return the record
1640 /// corresponding to it. This returns null on error.
1642 /// DefInst ::= DEF ObjectName ObjectBody
1644 llvm::Record *TGParser::ParseDef(MultiClass *CurMultiClass) {
1645 SMLoc DefLoc = Lex.getLoc();
1646 assert(Lex.getCode() == tgtok::Def && "Unknown tok");
1647 Lex.Lex(); // Eat the 'def' token.
1649 // Parse ObjectName and make a record for it.
1650 Record *CurRec = new Record(ParseObjectName(), DefLoc);
1652 if (!CurMultiClass) {
1653 // Top-level def definition.
1655 // Ensure redefinition doesn't happen.
1656 if (Records.getDef(CurRec->getName())) {
1657 Error(DefLoc, "def '" + CurRec->getName() + "' already defined");
1660 Records.addDef(CurRec);
1662 // Otherwise, a def inside a multiclass, add it to the multiclass.
1663 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
1664 if (CurMultiClass->DefPrototypes[i]->getName() == CurRec->getName()) {
1665 Error(DefLoc, "def '" + CurRec->getName() +
1666 "' already defined in this multiclass!");
1669 CurMultiClass->DefPrototypes.push_back(CurRec);
1672 if (ParseObjectBody(CurRec))
1675 if (CurMultiClass == 0) // Def's in multiclasses aren't really defs.
1676 CurRec->resolveReferences();
1678 // If ObjectBody has template arguments, it's an error.
1679 assert(CurRec->getTemplateArgs().empty() && "How'd this get template args?");
1684 /// ParseClass - Parse a tblgen class definition.
1686 /// ClassInst ::= CLASS ID TemplateArgList? ObjectBody
1688 bool TGParser::ParseClass() {
1689 assert(Lex.getCode() == tgtok::Class && "Unexpected token!");
1692 if (Lex.getCode() != tgtok::Id)
1693 return TokError("expected class name after 'class' keyword");
1695 Record *CurRec = Records.getClass(Lex.getCurStrVal());
1697 // If the body was previously defined, this is an error.
1698 if (!CurRec->getValues().empty() ||
1699 !CurRec->getSuperClasses().empty() ||
1700 !CurRec->getTemplateArgs().empty())
1701 return TokError("Class '" + CurRec->getName() + "' already defined");
1703 // If this is the first reference to this class, create and add it.
1704 CurRec = new Record(Lex.getCurStrVal(), Lex.getLoc());
1705 Records.addClass(CurRec);
1707 Lex.Lex(); // eat the name.
1709 // If there are template args, parse them.
1710 if (Lex.getCode() == tgtok::less)
1711 if (ParseTemplateArgList(CurRec))
1714 // Finally, parse the object body.
1715 return ParseObjectBody(CurRec);
1718 /// ParseLetList - Parse a non-empty list of assignment expressions into a list
1721 /// LetList ::= LetItem (',' LetItem)*
1722 /// LetItem ::= ID OptionalRangeList '=' Value
1724 std::vector<LetRecord> TGParser::ParseLetList() {
1725 std::vector<LetRecord> Result;
1728 if (Lex.getCode() != tgtok::Id) {
1729 TokError("expected identifier in let definition");
1730 return std::vector<LetRecord>();
1732 std::string Name = Lex.getCurStrVal();
1733 SMLoc NameLoc = Lex.getLoc();
1734 Lex.Lex(); // Eat the identifier.
1736 // Check for an optional RangeList.
1737 std::vector<unsigned> Bits;
1738 if (ParseOptionalRangeList(Bits))
1739 return std::vector<LetRecord>();
1740 std::reverse(Bits.begin(), Bits.end());
1742 if (Lex.getCode() != tgtok::equal) {
1743 TokError("expected '=' in let expression");
1744 return std::vector<LetRecord>();
1746 Lex.Lex(); // eat the '='.
1748 Init *Val = ParseValue(0);
1749 if (Val == 0) return std::vector<LetRecord>();
1751 // Now that we have everything, add the record.
1752 Result.push_back(LetRecord(Name, Bits, Val, NameLoc));
1754 if (Lex.getCode() != tgtok::comma)
1756 Lex.Lex(); // eat the comma.
1760 /// ParseTopLevelLet - Parse a 'let' at top level. This can be a couple of
1761 /// different related productions.
1763 /// Object ::= LET LetList IN '{' ObjectList '}'
1764 /// Object ::= LET LetList IN Object
1766 bool TGParser::ParseTopLevelLet() {
1767 assert(Lex.getCode() == tgtok::Let && "Unexpected token");
1770 // Add this entry to the let stack.
1771 std::vector<LetRecord> LetInfo = ParseLetList();
1772 if (LetInfo.empty()) return true;
1773 LetStack.push_back(LetInfo);
1775 if (Lex.getCode() != tgtok::In)
1776 return TokError("expected 'in' at end of top-level 'let'");
1779 // If this is a scalar let, just handle it now
1780 if (Lex.getCode() != tgtok::l_brace) {
1781 // LET LetList IN Object
1784 } else { // Object ::= LETCommand '{' ObjectList '}'
1785 SMLoc BraceLoc = Lex.getLoc();
1786 // Otherwise, this is a group let.
1787 Lex.Lex(); // eat the '{'.
1789 // Parse the object list.
1790 if (ParseObjectList())
1793 if (Lex.getCode() != tgtok::r_brace) {
1794 TokError("expected '}' at end of top level let command");
1795 return Error(BraceLoc, "to match this '{'");
1800 // Outside this let scope, this let block is not active.
1801 LetStack.pop_back();
1805 /// ParseMultiClassDef - Parse a def in a multiclass context.
1807 /// MultiClassDef ::= DefInst
1809 bool TGParser::ParseMultiClassDef(MultiClass *CurMC) {
1810 if (Lex.getCode() != tgtok::Def)
1811 return TokError("expected 'def' in multiclass body");
1813 Record *D = ParseDef(CurMC);
1814 if (D == 0) return true;
1816 // Copy the template arguments for the multiclass into the def.
1817 const std::vector<std::string> &TArgs = CurMC->Rec.getTemplateArgs();
1819 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1820 const RecordVal *RV = CurMC->Rec.getValue(TArgs[i]);
1821 assert(RV && "Template arg doesn't exist?");
1828 /// ParseMultiClass - Parse a multiclass definition.
1830 /// MultiClassInst ::= MULTICLASS ID TemplateArgList?
1831 /// ':' BaseMultiClassList '{' MultiClassDef+ '}'
1833 bool TGParser::ParseMultiClass() {
1834 assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");
1835 Lex.Lex(); // Eat the multiclass token.
1837 if (Lex.getCode() != tgtok::Id)
1838 return TokError("expected identifier after multiclass for name");
1839 std::string Name = Lex.getCurStrVal();
1841 if (MultiClasses.count(Name))
1842 return TokError("multiclass '" + Name + "' already defined");
1844 CurMultiClass = MultiClasses[Name] = new MultiClass(Name, Lex.getLoc());
1845 Lex.Lex(); // Eat the identifier.
1847 // If there are template args, parse them.
1848 if (Lex.getCode() == tgtok::less)
1849 if (ParseTemplateArgList(0))
1852 bool inherits = false;
1854 // If there are submulticlasses, parse them.
1855 if (Lex.getCode() == tgtok::colon) {
1860 // Read all of the submulticlasses.
1861 SubMultiClassReference SubMultiClass =
1862 ParseSubMultiClassReference(CurMultiClass);
1865 if (SubMultiClass.MC == 0) return true;
1868 if (AddSubMultiClass(CurMultiClass, SubMultiClass))
1871 if (Lex.getCode() != tgtok::comma) break;
1872 Lex.Lex(); // eat ','.
1873 SubMultiClass = ParseSubMultiClassReference(CurMultiClass);
1877 if (Lex.getCode() != tgtok::l_brace) {
1879 return TokError("expected '{' in multiclass definition");
1881 if (Lex.getCode() != tgtok::semi)
1882 return TokError("expected ';' in multiclass definition");
1884 Lex.Lex(); // eat the ';'.
1887 if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
1888 return TokError("multiclass must contain at least one def");
1890 while (Lex.getCode() != tgtok::r_brace)
1891 if (ParseMultiClassDef(CurMultiClass))
1894 Lex.Lex(); // eat the '}'.
1901 /// ParseDefm - Parse the instantiation of a multiclass.
1903 /// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
1905 bool TGParser::ParseDefm() {
1906 assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
1907 if (Lex.Lex() != tgtok::Id) // eat the defm.
1908 return TokError("expected identifier after defm");
1910 SMLoc DefmPrefixLoc = Lex.getLoc();
1911 std::string DefmPrefix = Lex.getCurStrVal();
1912 if (Lex.Lex() != tgtok::colon)
1913 return TokError("expected ':' after defm identifier");
1918 SMLoc SubClassLoc = Lex.getLoc();
1919 SubClassReference Ref = ParseSubClassReference(0, true);
1922 if (Ref.Rec == 0) return true;
1924 // To instantiate a multiclass, we need to first get the multiclass, then
1925 // instantiate each def contained in the multiclass with the SubClassRef
1926 // template parameters.
1927 MultiClass *MC = MultiClasses[Ref.Rec->getName()];
1928 assert(MC && "Didn't lookup multiclass correctly?");
1929 std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
1931 // Verify that the correct number of template arguments were specified.
1932 const std::vector<std::string> &TArgs = MC->Rec.getTemplateArgs();
1933 if (TArgs.size() < TemplateVals.size())
1934 return Error(SubClassLoc,
1935 "more template args specified than multiclass expects");
1937 // Loop over all the def's in the multiclass, instantiating each one.
1938 for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
1939 Record *DefProto = MC->DefPrototypes[i];
1941 // Add in the defm name
1942 std::string DefName = DefProto->getName();
1943 std::string::size_type idx = DefName.find("#NAME#");
1944 if (idx != std::string::npos) {
1945 DefName.replace(idx, 6, DefmPrefix);
1948 // Add the suffix to the defm name to get the new name.
1949 DefName = DefmPrefix + DefName;
1952 Record *CurRec = new Record(DefName, DefmPrefixLoc);
1954 SubClassReference Ref;
1955 Ref.RefLoc = DefmPrefixLoc;
1957 AddSubClass(CurRec, Ref);
1959 // Loop over all of the template arguments, setting them to the specified
1960 // value or leaving them as the default if necessary.
1961 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1962 // Check if a value is specified for this temp-arg.
1963 if (i < TemplateVals.size()) {
1965 if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], std::vector<unsigned>(),
1970 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
1973 CurRec->removeValue(TArgs[i]);
1975 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
1976 return Error(SubClassLoc,
1977 "value not specified for template argument #"+
1978 utostr(i) + " (" + TArgs[i] + ") of multiclassclass '" +
1979 MC->Rec.getName() + "'");
1983 // If the mdef is inside a 'let' expression, add to each def.
1984 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1985 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1986 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1987 LetStack[i][j].Bits, LetStack[i][j].Value)) {
1988 Error(DefmPrefixLoc, "when instantiating this defm");
1992 // Ensure redefinition doesn't happen.
1993 if (Records.getDef(CurRec->getName()))
1994 return Error(DefmPrefixLoc, "def '" + CurRec->getName() +
1995 "' already defined, instantiating defm with subdef '" +
1996 DefProto->getName() + "'");
1997 Records.addDef(CurRec);
1998 CurRec->resolveReferences();
2001 if (Lex.getCode() != tgtok::comma) break;
2002 Lex.Lex(); // eat ','.
2004 SubClassLoc = Lex.getLoc();
2005 Ref = ParseSubClassReference(0, true);
2008 if (Lex.getCode() != tgtok::semi)
2009 return TokError("expected ';' at end of defm");
2016 /// Object ::= ClassInst
2017 /// Object ::= DefInst
2018 /// Object ::= MultiClassInst
2019 /// Object ::= DefMInst
2020 /// Object ::= LETCommand '{' ObjectList '}'
2021 /// Object ::= LETCommand Object
2022 bool TGParser::ParseObject() {
2023 switch (Lex.getCode()) {
2024 default: assert(0 && "This is not an object");
2025 case tgtok::Let: return ParseTopLevelLet();
2026 case tgtok::Def: return ParseDef(0) == 0;
2027 case tgtok::Defm: return ParseDefm();
2028 case tgtok::Class: return ParseClass();
2029 case tgtok::MultiClass: return ParseMultiClass();
2034 /// ObjectList :== Object*
2035 bool TGParser::ParseObjectList() {
2036 while (isObjectStart(Lex.getCode())) {
2044 bool TGParser::ParseFile() {
2045 Lex.Lex(); // Prime the lexer.
2046 if (ParseObjectList()) return true;
2048 // If we have unread input at the end of the file, report it.
2049 if (Lex.getCode() == tgtok::Eof)
2052 return TokError("Unexpected input at top level");