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 //===----------------------------------------------------------------------===//
15 #include "llvm/TableGen/Record.h"
16 #include "llvm/ADT/StringExtras.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/Support/CommandLine.h"
23 //===----------------------------------------------------------------------===//
24 // Support Code for the Semantic Actions.
25 //===----------------------------------------------------------------------===//
28 struct SubClassReference {
31 std::vector<Init*> TemplateArgs;
32 SubClassReference() : Rec(0) {}
34 bool isInvalid() const { return Rec == 0; }
37 struct SubMultiClassReference {
40 std::vector<Init*> TemplateArgs;
41 SubMultiClassReference() : MC(0) {}
43 bool isInvalid() const { return MC == 0; }
47 void SubMultiClassReference::dump() const {
48 errs() << "Multiclass:\n";
52 errs() << "Template args:\n";
53 for (std::vector<Init *>::const_iterator i = TemplateArgs.begin(),
54 iend = TemplateArgs.end();
61 } // end namespace llvm
63 bool TGParser::AddValue(Record *CurRec, SMLoc Loc, const RecordVal &RV) {
65 CurRec = &CurMultiClass->Rec;
67 if (RecordVal *ERV = CurRec->getValue(RV.getNameInit())) {
68 // The value already exists in the class, treat this as a set.
69 if (ERV->setValue(RV.getValue()))
70 return Error(Loc, "New definition of '" + RV.getName() + "' of type '" +
71 RV.getType()->getAsString() + "' is incompatible with " +
72 "previous definition of type '" +
73 ERV->getType()->getAsString() + "'");
81 /// Return true on error, false on success.
82 bool TGParser::SetValue(Record *CurRec, SMLoc Loc, Init *ValName,
83 const std::vector<unsigned> &BitList, Init *V) {
86 if (CurRec == 0) CurRec = &CurMultiClass->Rec;
88 RecordVal *RV = CurRec->getValue(ValName);
90 return Error(Loc, "Value '" + ValName->getAsUnquotedString()
93 // Do not allow assignments like 'X = X'. This will just cause infinite loops
94 // in the resolution machinery.
96 if (VarInit *VI = dynamic_cast<VarInit*>(V))
97 if (VI->getNameInit() == ValName)
100 // If we are assigning to a subset of the bits in the value... then we must be
101 // assigning to a field of BitsRecTy, which must have a BitsInit
104 if (!BitList.empty()) {
105 BitsInit *CurVal = dynamic_cast<BitsInit*>(RV->getValue());
107 return Error(Loc, "Value '" + ValName->getAsUnquotedString()
108 + "' is not a bits type");
110 // Convert the incoming value to a bits type of the appropriate size...
111 Init *BI = V->convertInitializerTo(BitsRecTy::get(BitList.size()));
113 V->convertInitializerTo(BitsRecTy::get(BitList.size()));
114 return Error(Loc, "Initializer is not compatible with bit range");
117 // We should have a BitsInit type now.
118 BitsInit *BInit = dynamic_cast<BitsInit*>(BI);
121 SmallVector<Init *, 16> NewBits(CurVal->getNumBits());
123 // Loop over bits, assigning values as appropriate.
124 for (unsigned i = 0, e = BitList.size(); i != e; ++i) {
125 unsigned Bit = BitList[i];
127 return Error(Loc, "Cannot set bit #" + utostr(Bit) + " of value '" +
128 ValName->getAsUnquotedString() + "' more than once");
129 NewBits[Bit] = BInit->getBit(i);
132 for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
134 NewBits[i] = CurVal->getBit(i);
136 V = BitsInit::get(NewBits);
140 return Error(Loc, "Value '" + ValName->getAsUnquotedString() + "' of type '"
141 + RV->getType()->getAsString() +
142 "' is incompatible with initializer '" + V->getAsString()
147 /// AddSubClass - Add SubClass as a subclass to CurRec, resolving its template
148 /// args as SubClass's template arguments.
149 bool TGParser::AddSubClass(Record *CurRec, SubClassReference &SubClass) {
150 Record *SC = SubClass.Rec;
151 // Add all of the values in the subclass into the current class.
152 const std::vector<RecordVal> &Vals = SC->getValues();
153 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
154 if (AddValue(CurRec, SubClass.RefLoc, Vals[i]))
157 const std::vector<Init *> &TArgs = SC->getTemplateArgs();
159 // Ensure that an appropriate number of template arguments are specified.
160 if (TArgs.size() < SubClass.TemplateArgs.size())
161 return Error(SubClass.RefLoc, "More template args specified than expected");
163 // Loop over all of the template arguments, setting them to the specified
164 // value or leaving them as the default if necessary.
165 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
166 if (i < SubClass.TemplateArgs.size()) {
167 // If a value is specified for this template arg, set it now.
168 if (SetValue(CurRec, SubClass.RefLoc, TArgs[i], std::vector<unsigned>(),
169 SubClass.TemplateArgs[i]))
173 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
176 CurRec->removeValue(TArgs[i]);
178 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
179 return Error(SubClass.RefLoc,"Value not specified for template argument #"
180 + utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
181 + ") of subclass '" + SC->getNameInitAsString() + "'!");
185 // Since everything went well, we can now set the "superclass" list for the
187 const std::vector<Record*> &SCs = SC->getSuperClasses();
188 for (unsigned i = 0, e = SCs.size(); i != e; ++i) {
189 if (CurRec->isSubClassOf(SCs[i]))
190 return Error(SubClass.RefLoc,
191 "Already subclass of '" + SCs[i]->getName() + "'!\n");
192 CurRec->addSuperClass(SCs[i]);
195 if (CurRec->isSubClassOf(SC))
196 return Error(SubClass.RefLoc,
197 "Already subclass of '" + SC->getName() + "'!\n");
198 CurRec->addSuperClass(SC);
202 /// AddSubMultiClass - Add SubMultiClass as a subclass to
203 /// CurMC, resolving its template args as SubMultiClass's
204 /// template arguments.
205 bool TGParser::AddSubMultiClass(MultiClass *CurMC,
206 SubMultiClassReference &SubMultiClass) {
207 MultiClass *SMC = SubMultiClass.MC;
208 Record *CurRec = &CurMC->Rec;
210 const std::vector<RecordVal> &MCVals = CurRec->getValues();
212 // Add all of the values in the subclass into the current class.
213 const std::vector<RecordVal> &SMCVals = SMC->Rec.getValues();
214 for (unsigned i = 0, e = SMCVals.size(); i != e; ++i)
215 if (AddValue(CurRec, SubMultiClass.RefLoc, SMCVals[i]))
218 int newDefStart = CurMC->DefPrototypes.size();
220 // Add all of the defs in the subclass into the current multiclass.
221 for (MultiClass::RecordVector::const_iterator i = SMC->DefPrototypes.begin(),
222 iend = SMC->DefPrototypes.end();
225 // Clone the def and add it to the current multiclass
226 Record *NewDef = new Record(**i);
228 // Add all of the values in the superclass into the current def.
229 for (unsigned i = 0, e = MCVals.size(); i != e; ++i)
230 if (AddValue(NewDef, SubMultiClass.RefLoc, MCVals[i]))
233 CurMC->DefPrototypes.push_back(NewDef);
236 const std::vector<Init *> &SMCTArgs = SMC->Rec.getTemplateArgs();
238 // Ensure that an appropriate number of template arguments are
240 if (SMCTArgs.size() < SubMultiClass.TemplateArgs.size())
241 return Error(SubMultiClass.RefLoc,
242 "More template args specified than expected");
244 // Loop over all of the template arguments, setting them to the specified
245 // value or leaving them as the default if necessary.
246 for (unsigned i = 0, e = SMCTArgs.size(); i != e; ++i) {
247 if (i < SubMultiClass.TemplateArgs.size()) {
248 // If a value is specified for this template arg, set it in the
250 if (SetValue(CurRec, SubMultiClass.RefLoc, SMCTArgs[i],
251 std::vector<unsigned>(),
252 SubMultiClass.TemplateArgs[i]))
256 CurRec->resolveReferencesTo(CurRec->getValue(SMCTArgs[i]));
259 CurRec->removeValue(SMCTArgs[i]);
261 // If a value is specified for this template arg, set it in the
263 for (MultiClass::RecordVector::iterator j =
264 CurMC->DefPrototypes.begin() + newDefStart,
265 jend = CurMC->DefPrototypes.end();
270 if (SetValue(Def, SubMultiClass.RefLoc, SMCTArgs[i],
271 std::vector<unsigned>(),
272 SubMultiClass.TemplateArgs[i]))
276 Def->resolveReferencesTo(Def->getValue(SMCTArgs[i]));
279 Def->removeValue(SMCTArgs[i]);
281 } else if (!CurRec->getValue(SMCTArgs[i])->getValue()->isComplete()) {
282 return Error(SubMultiClass.RefLoc,
283 "Value not specified for template argument #"
284 + utostr(i) + " (" + SMCTArgs[i]->getAsUnquotedString()
285 + ") of subclass '" + SMC->Rec.getNameInitAsString() + "'!");
292 /// ProcessForeachDefs - Given a record, apply all of the variable
293 /// values in all surrounding foreach loops, creating new records for
294 /// each combination of values.
295 bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc) {
299 // We want to instantiate a new copy of CurRec for each combination
300 // of nested loop iterator values. We don't want top instantiate
301 // any copies until we have values for each loop iterator.
303 return ProcessForeachDefs(CurRec, Loc, IterVals);
306 /// ProcessForeachDefs - Given a record, a loop and a loop iterator,
307 /// apply each of the variable values in this loop and then process
309 bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals){
310 // Recursively build a tuple of iterator values.
311 if (IterVals.size() != Loops.size()) {
312 assert(IterVals.size() < Loops.size());
313 ForeachLoop &CurLoop = Loops[IterVals.size()];
314 ListInit *List = dynamic_cast<ListInit *>(CurLoop.ListValue);
316 Error(Loc, "Loop list is not a list");
320 // Process each value.
321 for (int64_t i = 0; i < List->getSize(); ++i) {
322 Init *ItemVal = List->resolveListElementReference(*CurRec, 0, i);
323 IterVals.push_back(IterRecord(CurLoop.IterVar, ItemVal));
324 if (ProcessForeachDefs(CurRec, Loc, IterVals))
331 // This is the bottom of the recursion. We have all of the iterator values
332 // for this point in the iteration space. Instantiate a new record to
333 // reflect this combination of values.
334 Record *IterRec = new Record(*CurRec);
336 // Set the iterator values now.
337 for (unsigned i = 0, e = IterVals.size(); i != e; ++i) {
338 VarInit *IterVar = IterVals[i].IterVar;
339 TypedInit *IVal = dynamic_cast<TypedInit *>(IterVals[i].IterValue);
341 Error(Loc, "foreach iterator value is untyped");
345 IterRec->addValue(RecordVal(IterVar->getName(), IVal->getType(), false));
347 if (SetValue(IterRec, Loc, IterVar->getName(),
348 std::vector<unsigned>(), IVal)) {
349 Error(Loc, "when instantiating this def");
354 IterRec->resolveReferencesTo(IterRec->getValue(IterVar->getName()));
357 IterRec->removeValue(IterVar->getName());
360 if (Records.getDef(IterRec->getNameInitAsString())) {
361 Error(Loc, "def already exists: " + IterRec->getNameInitAsString());
365 Records.addDef(IterRec);
366 IterRec->resolveReferences();
370 //===----------------------------------------------------------------------===//
372 //===----------------------------------------------------------------------===//
374 /// isObjectStart - Return true if this is a valid first token for an Object.
375 static bool isObjectStart(tgtok::TokKind K) {
376 return K == tgtok::Class || K == tgtok::Def ||
377 K == tgtok::Defm || K == tgtok::Let ||
378 K == tgtok::MultiClass || K == tgtok::Foreach;
381 static std::string GetNewAnonymousName() {
382 static unsigned AnonCounter = 0;
383 return "anonymous."+utostr(AnonCounter++);
386 /// ParseObjectName - If an object name is specified, return it. Otherwise,
387 /// return an anonymous name.
388 /// ObjectName ::= Value [ '#' Value ]*
389 /// ObjectName ::= /*empty*/
391 Init *TGParser::ParseObjectName(MultiClass *CurMultiClass) {
392 switch (Lex.getCode()) {
396 // These are all of the tokens that can begin an object body.
397 // Some of these can also begin values but we disallow those cases
398 // because they are unlikely to be useful.
399 return StringInit::get(GetNewAnonymousName());
406 CurRec = &CurMultiClass->Rec;
410 const TypedInit *CurRecName =
411 dynamic_cast<const TypedInit *>(CurRec->getNameInit());
413 TokError("Record name is not typed!");
416 Type = CurRecName->getType();
419 return ParseValue(CurRec, Type, ParseNameMode);
422 /// ParseClassID - Parse and resolve a reference to a class name. This returns
427 Record *TGParser::ParseClassID() {
428 if (Lex.getCode() != tgtok::Id) {
429 TokError("expected name for ClassID");
433 Record *Result = Records.getClass(Lex.getCurStrVal());
435 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
441 /// ParseMultiClassID - Parse and resolve a reference to a multiclass name.
442 /// This returns null on error.
444 /// MultiClassID ::= ID
446 MultiClass *TGParser::ParseMultiClassID() {
447 if (Lex.getCode() != tgtok::Id) {
448 TokError("expected name for ClassID");
452 MultiClass *Result = MultiClasses[Lex.getCurStrVal()];
454 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
460 Record *TGParser::ParseDefmID() {
461 if (Lex.getCode() != tgtok::Id) {
462 TokError("expected multiclass name");
466 MultiClass *MC = MultiClasses[Lex.getCurStrVal()];
468 TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
477 /// ParseSubClassReference - Parse a reference to a subclass or to a templated
478 /// subclass. This returns a SubClassRefTy with a null Record* on error.
480 /// SubClassRef ::= ClassID
481 /// SubClassRef ::= ClassID '<' ValueList '>'
483 SubClassReference TGParser::
484 ParseSubClassReference(Record *CurRec, bool isDefm) {
485 SubClassReference Result;
486 Result.RefLoc = Lex.getLoc();
489 Result.Rec = ParseDefmID();
491 Result.Rec = ParseClassID();
492 if (Result.Rec == 0) return Result;
494 // If there is no template arg list, we're done.
495 if (Lex.getCode() != tgtok::less)
497 Lex.Lex(); // Eat the '<'
499 if (Lex.getCode() == tgtok::greater) {
500 TokError("subclass reference requires a non-empty list of template values");
505 Result.TemplateArgs = ParseValueList(CurRec, Result.Rec);
506 if (Result.TemplateArgs.empty()) {
507 Result.Rec = 0; // Error parsing value list.
511 if (Lex.getCode() != tgtok::greater) {
512 TokError("expected '>' in template value list");
521 /// ParseSubMultiClassReference - Parse a reference to a subclass or to a
522 /// templated submulticlass. This returns a SubMultiClassRefTy with a null
523 /// Record* on error.
525 /// SubMultiClassRef ::= MultiClassID
526 /// SubMultiClassRef ::= MultiClassID '<' ValueList '>'
528 SubMultiClassReference TGParser::
529 ParseSubMultiClassReference(MultiClass *CurMC) {
530 SubMultiClassReference Result;
531 Result.RefLoc = Lex.getLoc();
533 Result.MC = ParseMultiClassID();
534 if (Result.MC == 0) return Result;
536 // If there is no template arg list, we're done.
537 if (Lex.getCode() != tgtok::less)
539 Lex.Lex(); // Eat the '<'
541 if (Lex.getCode() == tgtok::greater) {
542 TokError("subclass reference requires a non-empty list of template values");
547 Result.TemplateArgs = ParseValueList(&CurMC->Rec, &Result.MC->Rec);
548 if (Result.TemplateArgs.empty()) {
549 Result.MC = 0; // Error parsing value list.
553 if (Lex.getCode() != tgtok::greater) {
554 TokError("expected '>' in template value list");
563 /// ParseRangePiece - Parse a bit/value range.
564 /// RangePiece ::= INTVAL
565 /// RangePiece ::= INTVAL '-' INTVAL
566 /// RangePiece ::= INTVAL INTVAL
567 bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
568 if (Lex.getCode() != tgtok::IntVal) {
569 TokError("expected integer or bitrange");
572 int64_t Start = Lex.getCurIntVal();
576 return TokError("invalid range, cannot be negative");
578 switch (Lex.Lex()) { // eat first character.
580 Ranges.push_back(Start);
583 if (Lex.Lex() != tgtok::IntVal) {
584 TokError("expected integer value as end of range");
587 End = Lex.getCurIntVal();
590 End = -Lex.getCurIntVal();
594 return TokError("invalid range, cannot be negative");
599 for (; Start <= End; ++Start)
600 Ranges.push_back(Start);
602 for (; Start >= End; --Start)
603 Ranges.push_back(Start);
608 /// ParseRangeList - Parse a list of scalars and ranges into scalar values.
610 /// RangeList ::= RangePiece (',' RangePiece)*
612 std::vector<unsigned> TGParser::ParseRangeList() {
613 std::vector<unsigned> Result;
615 // Parse the first piece.
616 if (ParseRangePiece(Result))
617 return std::vector<unsigned>();
618 while (Lex.getCode() == tgtok::comma) {
619 Lex.Lex(); // Eat the comma.
621 // Parse the next range piece.
622 if (ParseRangePiece(Result))
623 return std::vector<unsigned>();
628 /// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
629 /// OptionalRangeList ::= '<' RangeList '>'
630 /// OptionalRangeList ::= /*empty*/
631 bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
632 if (Lex.getCode() != tgtok::less)
635 SMLoc StartLoc = Lex.getLoc();
636 Lex.Lex(); // eat the '<'
638 // Parse the range list.
639 Ranges = ParseRangeList();
640 if (Ranges.empty()) return true;
642 if (Lex.getCode() != tgtok::greater) {
643 TokError("expected '>' at end of range list");
644 return Error(StartLoc, "to match this '<'");
646 Lex.Lex(); // eat the '>'.
650 /// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
651 /// OptionalBitList ::= '{' RangeList '}'
652 /// OptionalBitList ::= /*empty*/
653 bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
654 if (Lex.getCode() != tgtok::l_brace)
657 SMLoc StartLoc = Lex.getLoc();
658 Lex.Lex(); // eat the '{'
660 // Parse the range list.
661 Ranges = ParseRangeList();
662 if (Ranges.empty()) return true;
664 if (Lex.getCode() != tgtok::r_brace) {
665 TokError("expected '}' at end of bit list");
666 return Error(StartLoc, "to match this '{'");
668 Lex.Lex(); // eat the '}'.
673 /// ParseType - Parse and return a tblgen type. This returns null on error.
675 /// Type ::= STRING // string type
676 /// Type ::= CODE // code type
677 /// Type ::= BIT // bit type
678 /// Type ::= BITS '<' INTVAL '>' // bits<x> type
679 /// Type ::= INT // int type
680 /// Type ::= LIST '<' Type '>' // list<x> type
681 /// Type ::= DAG // dag type
682 /// Type ::= ClassID // Record Type
684 RecTy *TGParser::ParseType() {
685 switch (Lex.getCode()) {
686 default: TokError("Unknown token when expecting a type"); return 0;
687 case tgtok::String: Lex.Lex(); return StringRecTy::get();
688 case tgtok::Code: Lex.Lex(); return StringRecTy::get();
689 case tgtok::Bit: Lex.Lex(); return BitRecTy::get();
690 case tgtok::Int: Lex.Lex(); return IntRecTy::get();
691 case tgtok::Dag: Lex.Lex(); return DagRecTy::get();
693 if (Record *R = ParseClassID()) return RecordRecTy::get(R);
696 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
697 TokError("expected '<' after bits type");
700 if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
701 TokError("expected integer in bits<n> type");
704 uint64_t Val = Lex.getCurIntVal();
705 if (Lex.Lex() != tgtok::greater) { // Eat count.
706 TokError("expected '>' at end of bits<n> type");
709 Lex.Lex(); // Eat '>'
710 return BitsRecTy::get(Val);
713 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
714 TokError("expected '<' after list type");
717 Lex.Lex(); // Eat '<'
718 RecTy *SubType = ParseType();
719 if (SubType == 0) return 0;
721 if (Lex.getCode() != tgtok::greater) {
722 TokError("expected '>' at end of list<ty> type");
725 Lex.Lex(); // Eat '>'
726 return ListRecTy::get(SubType);
731 /// ParseIDValue - Parse an ID as a value and decode what it means.
733 /// IDValue ::= ID [def local value]
734 /// IDValue ::= ID [def template arg]
735 /// IDValue ::= ID [multiclass local value]
736 /// IDValue ::= ID [multiclass template argument]
737 /// IDValue ::= ID [def name]
739 Init *TGParser::ParseIDValue(Record *CurRec, IDParseMode Mode) {
740 assert(Lex.getCode() == tgtok::Id && "Expected ID in ParseIDValue");
741 std::string Name = Lex.getCurStrVal();
742 SMLoc Loc = Lex.getLoc();
744 return ParseIDValue(CurRec, Name, Loc);
747 /// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
748 /// has already been read.
749 Init *TGParser::ParseIDValue(Record *CurRec,
750 const std::string &Name, SMLoc NameLoc,
753 if (const RecordVal *RV = CurRec->getValue(Name))
754 return VarInit::get(Name, RV->getType());
756 Init *TemplateArgName = QualifyName(*CurRec, CurMultiClass, Name, ":");
759 TemplateArgName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
762 if (CurRec->isTemplateArg(TemplateArgName)) {
763 const RecordVal *RV = CurRec->getValue(TemplateArgName);
764 assert(RV && "Template arg doesn't exist??");
765 return VarInit::get(TemplateArgName, RV->getType());
770 Init *MCName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
773 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
774 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
775 assert(RV && "Template arg doesn't exist??");
776 return VarInit::get(MCName, RV->getType());
780 // If this is in a foreach loop, make sure it's not a loop iterator
781 for (LoopVector::iterator i = Loops.begin(), iend = Loops.end();
784 VarInit *IterVar = dynamic_cast<VarInit *>(i->IterVar);
785 if (IterVar && IterVar->getName() == Name)
789 if (Mode == ParseNameMode)
790 return StringInit::get(Name);
792 if (Record *D = Records.getDef(Name))
793 return DefInit::get(D);
795 if (Mode == ParseValueMode) {
796 Error(NameLoc, "Variable not defined: '" + Name + "'");
800 return StringInit::get(Name);
803 /// ParseOperation - Parse an operator. This returns null on error.
805 /// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
807 Init *TGParser::ParseOperation(Record *CurRec) {
808 switch (Lex.getCode()) {
810 TokError("unknown operation");
815 case tgtok::XCast: { // Value ::= !unop '(' Value ')'
816 UnOpInit::UnaryOp Code;
819 switch (Lex.getCode()) {
820 default: llvm_unreachable("Unhandled code!");
822 Lex.Lex(); // eat the operation
823 Code = UnOpInit::CAST;
825 Type = ParseOperatorType();
828 TokError("did not get type for unary operator");
834 Lex.Lex(); // eat the operation
835 Code = UnOpInit::HEAD;
838 Lex.Lex(); // eat the operation
839 Code = UnOpInit::TAIL;
842 Lex.Lex(); // eat the operation
843 Code = UnOpInit::EMPTY;
844 Type = IntRecTy::get();
847 if (Lex.getCode() != tgtok::l_paren) {
848 TokError("expected '(' after unary operator");
851 Lex.Lex(); // eat the '('
853 Init *LHS = ParseValue(CurRec);
854 if (LHS == 0) return 0;
856 if (Code == UnOpInit::HEAD
857 || Code == UnOpInit::TAIL
858 || Code == UnOpInit::EMPTY) {
859 ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
860 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
861 TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
862 if (LHSl == 0 && LHSs == 0 && LHSt == 0) {
863 TokError("expected list or string type argument in unary operator");
867 ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
868 StringRecTy *SType = dynamic_cast<StringRecTy*>(LHSt->getType());
869 if (LType == 0 && SType == 0) {
870 TokError("expected list or string type argumnet in unary operator");
875 if (Code == UnOpInit::HEAD
876 || Code == UnOpInit::TAIL) {
877 if (LHSl == 0 && LHSt == 0) {
878 TokError("expected list type argumnet in unary operator");
882 if (LHSl && LHSl->getSize() == 0) {
883 TokError("empty list argument in unary operator");
887 Init *Item = LHSl->getElement(0);
888 TypedInit *Itemt = dynamic_cast<TypedInit*>(Item);
890 TokError("untyped list element in unary operator");
893 if (Code == UnOpInit::HEAD) {
894 Type = Itemt->getType();
896 Type = ListRecTy::get(Itemt->getType());
899 assert(LHSt && "expected list type argument in unary operator");
900 ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
902 TokError("expected list type argumnet in unary operator");
905 if (Code == UnOpInit::HEAD) {
906 Type = LType->getElementType();
914 if (Lex.getCode() != tgtok::r_paren) {
915 TokError("expected ')' in unary operator");
918 Lex.Lex(); // eat the ')'
919 return (UnOpInit::get(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
927 case tgtok::XStrConcat: { // Value ::= !binop '(' Value ',' Value ')'
928 tgtok::TokKind OpTok = Lex.getCode();
929 SMLoc OpLoc = Lex.getLoc();
930 Lex.Lex(); // eat the operation
932 BinOpInit::BinaryOp Code;
936 default: llvm_unreachable("Unhandled code!");
937 case tgtok::XConcat: Code = BinOpInit::CONCAT;Type = DagRecTy::get(); break;
938 case tgtok::XSRA: Code = BinOpInit::SRA; Type = IntRecTy::get(); break;
939 case tgtok::XSRL: Code = BinOpInit::SRL; Type = IntRecTy::get(); break;
940 case tgtok::XSHL: Code = BinOpInit::SHL; Type = IntRecTy::get(); break;
941 case tgtok::XEq: Code = BinOpInit::EQ; Type = BitRecTy::get(); break;
942 case tgtok::XStrConcat:
943 Code = BinOpInit::STRCONCAT;
944 Type = StringRecTy::get();
948 if (Lex.getCode() != tgtok::l_paren) {
949 TokError("expected '(' after binary operator");
952 Lex.Lex(); // eat the '('
954 SmallVector<Init*, 2> InitList;
956 InitList.push_back(ParseValue(CurRec));
957 if (InitList.back() == 0) return 0;
959 while (Lex.getCode() == tgtok::comma) {
960 Lex.Lex(); // eat the ','
962 InitList.push_back(ParseValue(CurRec));
963 if (InitList.back() == 0) return 0;
966 if (Lex.getCode() != tgtok::r_paren) {
967 TokError("expected ')' in operator");
970 Lex.Lex(); // eat the ')'
972 // We allow multiple operands to associative operators like !strconcat as
973 // shorthand for nesting them.
974 if (Code == BinOpInit::STRCONCAT) {
975 while (InitList.size() > 2) {
976 Init *RHS = InitList.pop_back_val();
977 RHS = (BinOpInit::get(Code, InitList.back(), RHS, Type))
978 ->Fold(CurRec, CurMultiClass);
979 InitList.back() = RHS;
983 if (InitList.size() == 2)
984 return (BinOpInit::get(Code, InitList[0], InitList[1], Type))
985 ->Fold(CurRec, CurMultiClass);
987 Error(OpLoc, "expected two operands to operator");
992 case tgtok::XForEach:
993 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
994 TernOpInit::TernaryOp Code;
997 tgtok::TokKind LexCode = Lex.getCode();
998 Lex.Lex(); // eat the operation
1000 default: llvm_unreachable("Unhandled code!");
1002 Code = TernOpInit::IF;
1004 case tgtok::XForEach:
1005 Code = TernOpInit::FOREACH;
1008 Code = TernOpInit::SUBST;
1011 if (Lex.getCode() != tgtok::l_paren) {
1012 TokError("expected '(' after ternary operator");
1015 Lex.Lex(); // eat the '('
1017 Init *LHS = ParseValue(CurRec);
1018 if (LHS == 0) return 0;
1020 if (Lex.getCode() != tgtok::comma) {
1021 TokError("expected ',' in ternary operator");
1024 Lex.Lex(); // eat the ','
1026 Init *MHS = ParseValue(CurRec);
1027 if (MHS == 0) return 0;
1029 if (Lex.getCode() != tgtok::comma) {
1030 TokError("expected ',' in ternary operator");
1033 Lex.Lex(); // eat the ','
1035 Init *RHS = ParseValue(CurRec);
1036 if (RHS == 0) return 0;
1038 if (Lex.getCode() != tgtok::r_paren) {
1039 TokError("expected ')' in binary operator");
1042 Lex.Lex(); // eat the ')'
1045 default: llvm_unreachable("Unhandled code!");
1050 if (TypedInit *MHSt = dynamic_cast<TypedInit*>(MHS))
1051 MHSTy = MHSt->getType();
1052 if (BitsInit *MHSbits = dynamic_cast<BitsInit*>(MHS))
1053 MHSTy = BitsRecTy::get(MHSbits->getNumBits());
1054 if (dynamic_cast<BitInit*>(MHS))
1055 MHSTy = BitRecTy::get();
1057 if (TypedInit *RHSt = dynamic_cast<TypedInit*>(RHS))
1058 RHSTy = RHSt->getType();
1059 if (BitsInit *RHSbits = dynamic_cast<BitsInit*>(RHS))
1060 RHSTy = BitsRecTy::get(RHSbits->getNumBits());
1061 if (dynamic_cast<BitInit*>(RHS))
1062 RHSTy = BitRecTy::get();
1064 // For UnsetInit, it's typed from the other hand.
1065 if (dynamic_cast<UnsetInit*>(MHS))
1067 if (dynamic_cast<UnsetInit*>(RHS))
1070 if (!MHSTy || !RHSTy) {
1071 TokError("could not get type for !if");
1075 if (MHSTy->typeIsConvertibleTo(RHSTy)) {
1077 } else if (RHSTy->typeIsConvertibleTo(MHSTy)) {
1080 TokError("inconsistent types for !if");
1085 case tgtok::XForEach: {
1086 TypedInit *MHSt = dynamic_cast<TypedInit *>(MHS);
1088 TokError("could not get type for !foreach");
1091 Type = MHSt->getType();
1094 case tgtok::XSubst: {
1095 TypedInit *RHSt = dynamic_cast<TypedInit *>(RHS);
1097 TokError("could not get type for !subst");
1100 Type = RHSt->getType();
1104 return (TernOpInit::get(Code, LHS, MHS, RHS, Type))->Fold(CurRec,
1110 /// ParseOperatorType - Parse a type for an operator. This returns
1113 /// OperatorType ::= '<' Type '>'
1115 RecTy *TGParser::ParseOperatorType() {
1118 if (Lex.getCode() != tgtok::less) {
1119 TokError("expected type name for operator");
1122 Lex.Lex(); // eat the <
1127 TokError("expected type name for operator");
1131 if (Lex.getCode() != tgtok::greater) {
1132 TokError("expected type name for operator");
1135 Lex.Lex(); // eat the >
1141 /// ParseSimpleValue - Parse a tblgen value. This returns null on error.
1143 /// SimpleValue ::= IDValue
1144 /// SimpleValue ::= INTVAL
1145 /// SimpleValue ::= STRVAL+
1146 /// SimpleValue ::= CODEFRAGMENT
1147 /// SimpleValue ::= '?'
1148 /// SimpleValue ::= '{' ValueList '}'
1149 /// SimpleValue ::= ID '<' ValueListNE '>'
1150 /// SimpleValue ::= '[' ValueList ']'
1151 /// SimpleValue ::= '(' IDValue DagArgList ')'
1152 /// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
1153 /// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
1154 /// SimpleValue ::= SRATOK '(' Value ',' Value ')'
1155 /// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
1156 /// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
1158 Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType,
1161 switch (Lex.getCode()) {
1162 default: TokError("Unknown token when parsing a value"); break;
1164 // This is a leading paste operation. This is deprecated but
1165 // still exists in some .td files. Ignore it.
1166 Lex.Lex(); // Skip '#'.
1167 return ParseSimpleValue(CurRec, ItemType, Mode);
1168 case tgtok::IntVal: R = IntInit::get(Lex.getCurIntVal()); Lex.Lex(); break;
1169 case tgtok::StrVal: {
1170 std::string Val = Lex.getCurStrVal();
1173 // Handle multiple consecutive concatenated strings.
1174 while (Lex.getCode() == tgtok::StrVal) {
1175 Val += Lex.getCurStrVal();
1179 R = StringInit::get(Val);
1182 case tgtok::CodeFragment:
1183 R = StringInit::get(Lex.getCurStrVal());
1186 case tgtok::question:
1187 R = UnsetInit::get();
1191 SMLoc NameLoc = Lex.getLoc();
1192 std::string Name = Lex.getCurStrVal();
1193 if (Lex.Lex() != tgtok::less) // consume the Id.
1194 return ParseIDValue(CurRec, Name, NameLoc, Mode); // Value ::= IDValue
1196 // Value ::= ID '<' ValueListNE '>'
1197 if (Lex.Lex() == tgtok::greater) {
1198 TokError("expected non-empty value list");
1202 // This is a CLASS<initvalslist> expression. This is supposed to synthesize
1203 // a new anonymous definition, deriving from CLASS<initvalslist> with no
1205 Record *Class = Records.getClass(Name);
1207 Error(NameLoc, "Expected a class name, got '" + Name + "'");
1211 std::vector<Init*> ValueList = ParseValueList(CurRec, Class);
1212 if (ValueList.empty()) return 0;
1214 if (Lex.getCode() != tgtok::greater) {
1215 TokError("expected '>' at end of value list");
1218 Lex.Lex(); // eat the '>'
1220 // Create the new record, set it as CurRec temporarily.
1221 static unsigned AnonCounter = 0;
1222 Record *NewRec = new Record("anonymous.val."+utostr(AnonCounter++),
1225 SubClassReference SCRef;
1226 SCRef.RefLoc = NameLoc;
1228 SCRef.TemplateArgs = ValueList;
1229 // Add info about the subclass to NewRec.
1230 if (AddSubClass(NewRec, SCRef))
1232 NewRec->resolveReferences();
1233 Records.addDef(NewRec);
1235 // The result of the expression is a reference to the new record.
1236 return DefInit::get(NewRec);
1238 case tgtok::l_brace: { // Value ::= '{' ValueList '}'
1239 SMLoc BraceLoc = Lex.getLoc();
1240 Lex.Lex(); // eat the '{'
1241 std::vector<Init*> Vals;
1243 if (Lex.getCode() != tgtok::r_brace) {
1244 Vals = ParseValueList(CurRec);
1245 if (Vals.empty()) return 0;
1247 if (Lex.getCode() != tgtok::r_brace) {
1248 TokError("expected '}' at end of bit list value");
1251 Lex.Lex(); // eat the '}'
1253 SmallVector<Init *, 16> NewBits(Vals.size());
1255 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1256 Init *Bit = Vals[i]->convertInitializerTo(BitRecTy::get());
1258 Error(BraceLoc, "Element #" + utostr(i) + " (" + Vals[i]->getAsString()+
1259 ") is not convertable to a bit");
1262 NewBits[Vals.size()-i-1] = Bit;
1264 return BitsInit::get(NewBits);
1266 case tgtok::l_square: { // Value ::= '[' ValueList ']'
1267 Lex.Lex(); // eat the '['
1268 std::vector<Init*> Vals;
1270 RecTy *DeducedEltTy = 0;
1271 ListRecTy *GivenListTy = 0;
1273 if (ItemType != 0) {
1274 ListRecTy *ListType = dynamic_cast<ListRecTy*>(ItemType);
1275 if (ListType == 0) {
1276 std::stringstream s;
1277 s << "Type mismatch for list, expected list type, got "
1278 << ItemType->getAsString();
1282 GivenListTy = ListType;
1285 if (Lex.getCode() != tgtok::r_square) {
1286 Vals = ParseValueList(CurRec, 0,
1287 GivenListTy ? GivenListTy->getElementType() : 0);
1288 if (Vals.empty()) return 0;
1290 if (Lex.getCode() != tgtok::r_square) {
1291 TokError("expected ']' at end of list value");
1294 Lex.Lex(); // eat the ']'
1296 RecTy *GivenEltTy = 0;
1297 if (Lex.getCode() == tgtok::less) {
1298 // Optional list element type
1299 Lex.Lex(); // eat the '<'
1301 GivenEltTy = ParseType();
1302 if (GivenEltTy == 0) {
1303 // Couldn't parse element type
1307 if (Lex.getCode() != tgtok::greater) {
1308 TokError("expected '>' at end of list element type");
1311 Lex.Lex(); // eat the '>'
1316 for (std::vector<Init *>::iterator i = Vals.begin(), ie = Vals.end();
1319 TypedInit *TArg = dynamic_cast<TypedInit*>(*i);
1321 TokError("Untyped list element");
1325 EltTy = resolveTypes(EltTy, TArg->getType());
1327 TokError("Incompatible types in list elements");
1331 EltTy = TArg->getType();
1335 if (GivenEltTy != 0) {
1337 // Verify consistency
1338 if (!EltTy->typeIsConvertibleTo(GivenEltTy)) {
1339 TokError("Incompatible types in list elements");
1347 if (ItemType == 0) {
1348 TokError("No type for list");
1351 DeducedEltTy = GivenListTy->getElementType();
1353 // Make sure the deduced type is compatible with the given type
1355 if (!EltTy->typeIsConvertibleTo(GivenListTy->getElementType())) {
1356 TokError("Element type mismatch for list");
1360 DeducedEltTy = EltTy;
1363 return ListInit::get(Vals, DeducedEltTy);
1365 case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
1366 Lex.Lex(); // eat the '('
1367 if (Lex.getCode() != tgtok::Id && Lex.getCode() != tgtok::XCast) {
1368 TokError("expected identifier in dag init");
1372 Init *Operator = ParseValue(CurRec);
1373 if (Operator == 0) return 0;
1375 // If the operator name is present, parse it.
1376 std::string OperatorName;
1377 if (Lex.getCode() == tgtok::colon) {
1378 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1379 TokError("expected variable name in dag operator");
1382 OperatorName = Lex.getCurStrVal();
1383 Lex.Lex(); // eat the VarName.
1386 std::vector<std::pair<llvm::Init*, std::string> > DagArgs;
1387 if (Lex.getCode() != tgtok::r_paren) {
1388 DagArgs = ParseDagArgList(CurRec);
1389 if (DagArgs.empty()) return 0;
1392 if (Lex.getCode() != tgtok::r_paren) {
1393 TokError("expected ')' in dag init");
1396 Lex.Lex(); // eat the ')'
1398 return DagInit::get(Operator, OperatorName, DagArgs);
1404 case tgtok::XCast: // Value ::= !unop '(' Value ')'
1405 case tgtok::XConcat:
1410 case tgtok::XStrConcat: // Value ::= !binop '(' Value ',' Value ')'
1412 case tgtok::XForEach:
1413 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
1414 return ParseOperation(CurRec);
1421 /// ParseValue - Parse a tblgen value. This returns null on error.
1423 /// Value ::= SimpleValue ValueSuffix*
1424 /// ValueSuffix ::= '{' BitList '}'
1425 /// ValueSuffix ::= '[' BitList ']'
1426 /// ValueSuffix ::= '.' ID
1428 Init *TGParser::ParseValue(Record *CurRec, RecTy *ItemType, IDParseMode Mode) {
1429 Init *Result = ParseSimpleValue(CurRec, ItemType, Mode);
1430 if (Result == 0) return 0;
1432 // Parse the suffixes now if present.
1434 switch (Lex.getCode()) {
1435 default: return Result;
1436 case tgtok::l_brace: {
1437 if (Mode == ParseNameMode || Mode == ParseForeachMode)
1438 // This is the beginning of the object body.
1441 SMLoc CurlyLoc = Lex.getLoc();
1442 Lex.Lex(); // eat the '{'
1443 std::vector<unsigned> Ranges = ParseRangeList();
1444 if (Ranges.empty()) return 0;
1446 // Reverse the bitlist.
1447 std::reverse(Ranges.begin(), Ranges.end());
1448 Result = Result->convertInitializerBitRange(Ranges);
1450 Error(CurlyLoc, "Invalid bit range for value");
1455 if (Lex.getCode() != tgtok::r_brace) {
1456 TokError("expected '}' at end of bit range list");
1462 case tgtok::l_square: {
1463 SMLoc SquareLoc = Lex.getLoc();
1464 Lex.Lex(); // eat the '['
1465 std::vector<unsigned> Ranges = ParseRangeList();
1466 if (Ranges.empty()) return 0;
1468 Result = Result->convertInitListSlice(Ranges);
1470 Error(SquareLoc, "Invalid range for list slice");
1475 if (Lex.getCode() != tgtok::r_square) {
1476 TokError("expected ']' at end of list slice");
1483 if (Lex.Lex() != tgtok::Id) { // eat the .
1484 TokError("expected field identifier after '.'");
1487 if (!Result->getFieldType(Lex.getCurStrVal())) {
1488 TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
1489 Result->getAsString() + "'");
1492 Result = FieldInit::get(Result, Lex.getCurStrVal());
1493 Lex.Lex(); // eat field name
1497 SMLoc PasteLoc = Lex.getLoc();
1499 // Create a !strconcat() operation, first casting each operand to
1500 // a string if necessary.
1502 TypedInit *LHS = dynamic_cast<TypedInit *>(Result);
1504 Error(PasteLoc, "LHS of paste is not typed!");
1508 if (LHS->getType() != StringRecTy::get()) {
1509 LHS = UnOpInit::get(UnOpInit::CAST, LHS, StringRecTy::get());
1514 Lex.Lex(); // Eat the '#'.
1515 switch (Lex.getCode()) {
1518 case tgtok::l_brace:
1519 // These are all of the tokens that can begin an object body.
1520 // Some of these can also begin values but we disallow those cases
1521 // because they are unlikely to be useful.
1523 // Trailing paste, concat with an empty string.
1524 RHS = StringInit::get("");
1528 Init *RHSResult = ParseValue(CurRec, ItemType, ParseNameMode);
1529 RHS = dynamic_cast<TypedInit *>(RHSResult);
1531 Error(PasteLoc, "RHS of paste is not typed!");
1535 if (RHS->getType() != StringRecTy::get()) {
1536 RHS = UnOpInit::get(UnOpInit::CAST, RHS, StringRecTy::get());
1542 Result = BinOpInit::get(BinOpInit::STRCONCAT, LHS, RHS,
1543 StringRecTy::get())->Fold(CurRec, CurMultiClass);
1549 /// ParseDagArgList - Parse the argument list for a dag literal expression.
1551 /// ParseDagArgList ::= Value (':' VARNAME)?
1552 /// ParseDagArgList ::= ParseDagArgList ',' Value (':' VARNAME)?
1553 std::vector<std::pair<llvm::Init*, std::string> >
1554 TGParser::ParseDagArgList(Record *CurRec) {
1555 std::vector<std::pair<llvm::Init*, std::string> > Result;
1558 Init *Val = ParseValue(CurRec);
1559 if (Val == 0) return std::vector<std::pair<llvm::Init*, std::string> >();
1561 // If the variable name is present, add it.
1562 std::string VarName;
1563 if (Lex.getCode() == tgtok::colon) {
1564 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1565 TokError("expected variable name in dag literal");
1566 return std::vector<std::pair<llvm::Init*, std::string> >();
1568 VarName = Lex.getCurStrVal();
1569 Lex.Lex(); // eat the VarName.
1572 Result.push_back(std::make_pair(Val, VarName));
1574 if (Lex.getCode() != tgtok::comma) break;
1575 Lex.Lex(); // eat the ','
1582 /// ParseValueList - Parse a comma separated list of values, returning them as a
1583 /// vector. Note that this always expects to be able to parse at least one
1584 /// value. It returns an empty list if this is not possible.
1586 /// ValueList ::= Value (',' Value)
1588 std::vector<Init*> TGParser::ParseValueList(Record *CurRec, Record *ArgsRec,
1590 std::vector<Init*> Result;
1591 RecTy *ItemType = EltTy;
1592 unsigned int ArgN = 0;
1593 if (ArgsRec != 0 && EltTy == 0) {
1594 const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
1595 if (!TArgs.size()) {
1596 TokError("template argument provided to non-template class");
1597 return std::vector<Init*>();
1599 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1601 errs() << "Cannot find template arg " << ArgN << " (" << TArgs[ArgN]
1604 assert(RV && "Template argument record not found??");
1605 ItemType = RV->getType();
1608 Result.push_back(ParseValue(CurRec, ItemType));
1609 if (Result.back() == 0) return std::vector<Init*>();
1611 while (Lex.getCode() == tgtok::comma) {
1612 Lex.Lex(); // Eat the comma
1614 if (ArgsRec != 0 && EltTy == 0) {
1615 const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
1616 if (ArgN >= TArgs.size()) {
1617 TokError("too many template arguments");
1618 return std::vector<Init*>();
1620 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1621 assert(RV && "Template argument record not found??");
1622 ItemType = RV->getType();
1625 Result.push_back(ParseValue(CurRec, ItemType));
1626 if (Result.back() == 0) return std::vector<Init*>();
1633 /// ParseDeclaration - Read a declaration, returning the name of field ID, or an
1634 /// empty string on error. This can happen in a number of different context's,
1635 /// including within a def or in the template args for a def (which which case
1636 /// CurRec will be non-null) and within the template args for a multiclass (in
1637 /// which case CurRec will be null, but CurMultiClass will be set). This can
1638 /// also happen within a def that is within a multiclass, which will set both
1639 /// CurRec and CurMultiClass.
1641 /// Declaration ::= FIELD? Type ID ('=' Value)?
1643 Init *TGParser::ParseDeclaration(Record *CurRec,
1644 bool ParsingTemplateArgs) {
1645 // Read the field prefix if present.
1646 bool HasField = Lex.getCode() == tgtok::Field;
1647 if (HasField) Lex.Lex();
1649 RecTy *Type = ParseType();
1650 if (Type == 0) return 0;
1652 if (Lex.getCode() != tgtok::Id) {
1653 TokError("Expected identifier in declaration");
1657 SMLoc IdLoc = Lex.getLoc();
1658 Init *DeclName = StringInit::get(Lex.getCurStrVal());
1661 if (ParsingTemplateArgs) {
1663 DeclName = QualifyName(*CurRec, CurMultiClass, DeclName, ":");
1665 assert(CurMultiClass);
1668 DeclName = QualifyName(CurMultiClass->Rec, CurMultiClass, DeclName,
1673 if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
1676 // If a value is present, parse it.
1677 if (Lex.getCode() == tgtok::equal) {
1679 SMLoc ValLoc = Lex.getLoc();
1680 Init *Val = ParseValue(CurRec, Type);
1682 SetValue(CurRec, ValLoc, DeclName, std::vector<unsigned>(), Val))
1689 /// ParseForeachDeclaration - Read a foreach declaration, returning
1690 /// the name of the declared object or a NULL Init on error. Return
1691 /// the name of the parsed initializer list through ForeachListName.
1693 /// ForeachDeclaration ::= ID '=' '[' ValueList ']'
1694 /// ForeachDeclaration ::= ID '=' '{' RangeList '}'
1695 /// ForeachDeclaration ::= ID '=' RangePiece
1697 VarInit *TGParser::ParseForeachDeclaration(ListInit *&ForeachListValue) {
1698 if (Lex.getCode() != tgtok::Id) {
1699 TokError("Expected identifier in foreach declaration");
1703 Init *DeclName = StringInit::get(Lex.getCurStrVal());
1706 // If a value is present, parse it.
1707 if (Lex.getCode() != tgtok::equal) {
1708 TokError("Expected '=' in foreach declaration");
1711 Lex.Lex(); // Eat the '='
1713 RecTy *IterType = 0;
1714 std::vector<unsigned> Ranges;
1716 switch (Lex.getCode()) {
1717 default: TokError("Unknown token when expecting a range list"); return 0;
1718 case tgtok::l_square: { // '[' ValueList ']'
1719 Init *List = ParseSimpleValue(0, 0, ParseForeachMode);
1720 ForeachListValue = dynamic_cast<ListInit*>(List);
1721 if (ForeachListValue == 0) {
1722 TokError("Expected a Value list");
1725 RecTy *ValueType = ForeachListValue->getType();
1726 ListRecTy *ListType = dynamic_cast<ListRecTy *>(ValueType);
1727 if (ListType == 0) {
1728 TokError("Value list is not of list type");
1731 IterType = ListType->getElementType();
1735 case tgtok::IntVal: { // RangePiece.
1736 if (ParseRangePiece(Ranges))
1741 case tgtok::l_brace: { // '{' RangeList '}'
1742 Lex.Lex(); // eat the '{'
1743 Ranges = ParseRangeList();
1744 if (Lex.getCode() != tgtok::r_brace) {
1745 TokError("expected '}' at end of bit range list");
1753 if (!Ranges.empty()) {
1754 assert(!IterType && "Type already initialized?");
1755 IterType = IntRecTy::get();
1756 std::vector<Init*> Values;
1757 for (unsigned i = 0, e = Ranges.size(); i != e; ++i)
1758 Values.push_back(IntInit::get(Ranges[i]));
1759 ForeachListValue = ListInit::get(Values, IterType);
1765 return VarInit::get(DeclName, IterType);
1768 /// ParseTemplateArgList - Read a template argument list, which is a non-empty
1769 /// sequence of template-declarations in <>'s. If CurRec is non-null, these are
1770 /// template args for a def, which may or may not be in a multiclass. If null,
1771 /// these are the template args for a multiclass.
1773 /// TemplateArgList ::= '<' Declaration (',' Declaration)* '>'
1775 bool TGParser::ParseTemplateArgList(Record *CurRec) {
1776 assert(Lex.getCode() == tgtok::less && "Not a template arg list!");
1777 Lex.Lex(); // eat the '<'
1779 Record *TheRecToAddTo = CurRec ? CurRec : &CurMultiClass->Rec;
1781 // Read the first declaration.
1782 Init *TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1786 TheRecToAddTo->addTemplateArg(TemplArg);
1788 while (Lex.getCode() == tgtok::comma) {
1789 Lex.Lex(); // eat the ','
1791 // Read the following declarations.
1792 TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1795 TheRecToAddTo->addTemplateArg(TemplArg);
1798 if (Lex.getCode() != tgtok::greater)
1799 return TokError("expected '>' at end of template argument list");
1800 Lex.Lex(); // eat the '>'.
1805 /// ParseBodyItem - Parse a single item at within the body of a def or class.
1807 /// BodyItem ::= Declaration ';'
1808 /// BodyItem ::= LET ID OptionalBitList '=' Value ';'
1809 bool TGParser::ParseBodyItem(Record *CurRec) {
1810 if (Lex.getCode() != tgtok::Let) {
1811 if (ParseDeclaration(CurRec, false) == 0)
1814 if (Lex.getCode() != tgtok::semi)
1815 return TokError("expected ';' after declaration");
1820 // LET ID OptionalRangeList '=' Value ';'
1821 if (Lex.Lex() != tgtok::Id)
1822 return TokError("expected field identifier after let");
1824 SMLoc IdLoc = Lex.getLoc();
1825 std::string FieldName = Lex.getCurStrVal();
1826 Lex.Lex(); // eat the field name.
1828 std::vector<unsigned> BitList;
1829 if (ParseOptionalBitList(BitList))
1831 std::reverse(BitList.begin(), BitList.end());
1833 if (Lex.getCode() != tgtok::equal)
1834 return TokError("expected '=' in let expression");
1835 Lex.Lex(); // eat the '='.
1837 RecordVal *Field = CurRec->getValue(FieldName);
1839 return TokError("Value '" + FieldName + "' unknown!");
1841 RecTy *Type = Field->getType();
1843 Init *Val = ParseValue(CurRec, Type);
1844 if (Val == 0) return true;
1846 if (Lex.getCode() != tgtok::semi)
1847 return TokError("expected ';' after let expression");
1850 return SetValue(CurRec, IdLoc, FieldName, BitList, Val);
1853 /// ParseBody - Read the body of a class or def. Return true on error, false on
1857 /// Body ::= '{' BodyList '}'
1858 /// BodyList BodyItem*
1860 bool TGParser::ParseBody(Record *CurRec) {
1861 // If this is a null definition, just eat the semi and return.
1862 if (Lex.getCode() == tgtok::semi) {
1867 if (Lex.getCode() != tgtok::l_brace)
1868 return TokError("Expected ';' or '{' to start body");
1872 while (Lex.getCode() != tgtok::r_brace)
1873 if (ParseBodyItem(CurRec))
1881 /// ParseObjectBody - Parse the body of a def or class. This consists of an
1882 /// optional ClassList followed by a Body. CurRec is the current def or class
1883 /// that is being parsed.
1885 /// ObjectBody ::= BaseClassList Body
1886 /// BaseClassList ::= /*empty*/
1887 /// BaseClassList ::= ':' BaseClassListNE
1888 /// BaseClassListNE ::= SubClassRef (',' SubClassRef)*
1890 bool TGParser::ParseObjectBody(Record *CurRec) {
1891 // If there is a baseclass list, read it.
1892 if (Lex.getCode() == tgtok::colon) {
1895 // Read all of the subclasses.
1896 SubClassReference SubClass = ParseSubClassReference(CurRec, false);
1899 if (SubClass.Rec == 0) return true;
1902 if (AddSubClass(CurRec, SubClass))
1905 if (Lex.getCode() != tgtok::comma) break;
1906 Lex.Lex(); // eat ','.
1907 SubClass = ParseSubClassReference(CurRec, false);
1911 // Process any variables on the let stack.
1912 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1913 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1914 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1915 LetStack[i][j].Bits, LetStack[i][j].Value))
1918 return ParseBody(CurRec);
1921 /// ParseDef - Parse and return a top level or multiclass def, return the record
1922 /// corresponding to it. This returns null on error.
1924 /// DefInst ::= DEF ObjectName ObjectBody
1926 bool TGParser::ParseDef(MultiClass *CurMultiClass) {
1927 SMLoc DefLoc = Lex.getLoc();
1928 assert(Lex.getCode() == tgtok::Def && "Unknown tok");
1929 Lex.Lex(); // Eat the 'def' token.
1931 // Parse ObjectName and make a record for it.
1932 Record *CurRec = new Record(ParseObjectName(CurMultiClass), DefLoc, Records);
1934 if (!CurMultiClass && Loops.empty()) {
1935 // Top-level def definition.
1937 // Ensure redefinition doesn't happen.
1938 if (Records.getDef(CurRec->getNameInitAsString())) {
1939 Error(DefLoc, "def '" + CurRec->getNameInitAsString()
1940 + "' already defined");
1943 Records.addDef(CurRec);
1944 } else if (CurMultiClass) {
1945 // Otherwise, a def inside a multiclass, add it to the multiclass.
1946 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
1947 if (CurMultiClass->DefPrototypes[i]->getNameInit()
1948 == CurRec->getNameInit()) {
1949 Error(DefLoc, "def '" + CurRec->getNameInitAsString() +
1950 "' already defined in this multiclass!");
1953 CurMultiClass->DefPrototypes.push_back(CurRec);
1956 if (ParseObjectBody(CurRec))
1959 if (CurMultiClass == 0) // Def's in multiclasses aren't really defs.
1960 // See Record::setName(). This resolve step will see any new name
1961 // for the def that might have been created when resolving
1962 // inheritance, values and arguments above.
1963 CurRec->resolveReferences();
1965 // If ObjectBody has template arguments, it's an error.
1966 assert(CurRec->getTemplateArgs().empty() && "How'd this get template args?");
1968 if (CurMultiClass) {
1969 // Copy the template arguments for the multiclass into the def.
1970 const std::vector<Init *> &TArgs =
1971 CurMultiClass->Rec.getTemplateArgs();
1973 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1974 const RecordVal *RV = CurMultiClass->Rec.getValue(TArgs[i]);
1975 assert(RV && "Template arg doesn't exist?");
1976 CurRec->addValue(*RV);
1980 if (ProcessForeachDefs(CurRec, DefLoc)) {
1982 "Could not process loops for def" + CurRec->getNameInitAsString());
1989 /// ParseForeach - Parse a for statement. Return the record corresponding
1990 /// to it. This returns true on error.
1992 /// Foreach ::= FOREACH Declaration IN '{ ObjectList '}'
1993 /// Foreach ::= FOREACH Declaration IN Object
1995 bool TGParser::ParseForeach(MultiClass *CurMultiClass) {
1996 assert(Lex.getCode() == tgtok::Foreach && "Unknown tok");
1997 Lex.Lex(); // Eat the 'for' token.
1999 // Make a temporary object to record items associated with the for
2001 ListInit *ListValue = 0;
2002 VarInit *IterName = ParseForeachDeclaration(ListValue);
2004 return TokError("expected declaration in for");
2006 if (Lex.getCode() != tgtok::In)
2007 return TokError("Unknown tok");
2008 Lex.Lex(); // Eat the in
2010 // Create a loop object and remember it.
2011 Loops.push_back(ForeachLoop(IterName, ListValue));
2013 if (Lex.getCode() != tgtok::l_brace) {
2014 // FOREACH Declaration IN Object
2015 if (ParseObject(CurMultiClass))
2019 SMLoc BraceLoc = Lex.getLoc();
2020 // Otherwise, this is a group foreach.
2021 Lex.Lex(); // eat the '{'.
2023 // Parse the object list.
2024 if (ParseObjectList(CurMultiClass))
2027 if (Lex.getCode() != tgtok::r_brace) {
2028 TokError("expected '}' at end of foreach command");
2029 return Error(BraceLoc, "to match this '{'");
2031 Lex.Lex(); // Eat the }
2034 // We've processed everything in this loop.
2040 /// ParseClass - Parse a tblgen class definition.
2042 /// ClassInst ::= CLASS ID TemplateArgList? ObjectBody
2044 bool TGParser::ParseClass() {
2045 assert(Lex.getCode() == tgtok::Class && "Unexpected token!");
2048 if (Lex.getCode() != tgtok::Id)
2049 return TokError("expected class name after 'class' keyword");
2051 Record *CurRec = Records.getClass(Lex.getCurStrVal());
2053 // If the body was previously defined, this is an error.
2054 if (CurRec->getValues().size() > 1 || // Account for NAME.
2055 !CurRec->getSuperClasses().empty() ||
2056 !CurRec->getTemplateArgs().empty())
2057 return TokError("Class '" + CurRec->getNameInitAsString()
2058 + "' already defined");
2060 // If this is the first reference to this class, create and add it.
2061 CurRec = new Record(Lex.getCurStrVal(), Lex.getLoc(), Records);
2062 Records.addClass(CurRec);
2064 Lex.Lex(); // eat the name.
2066 // If there are template args, parse them.
2067 if (Lex.getCode() == tgtok::less)
2068 if (ParseTemplateArgList(CurRec))
2071 // Finally, parse the object body.
2072 return ParseObjectBody(CurRec);
2075 /// ParseLetList - Parse a non-empty list of assignment expressions into a list
2078 /// LetList ::= LetItem (',' LetItem)*
2079 /// LetItem ::= ID OptionalRangeList '=' Value
2081 std::vector<LetRecord> TGParser::ParseLetList() {
2082 std::vector<LetRecord> Result;
2085 if (Lex.getCode() != tgtok::Id) {
2086 TokError("expected identifier in let definition");
2087 return std::vector<LetRecord>();
2089 std::string Name = Lex.getCurStrVal();
2090 SMLoc NameLoc = Lex.getLoc();
2091 Lex.Lex(); // Eat the identifier.
2093 // Check for an optional RangeList.
2094 std::vector<unsigned> Bits;
2095 if (ParseOptionalRangeList(Bits))
2096 return std::vector<LetRecord>();
2097 std::reverse(Bits.begin(), Bits.end());
2099 if (Lex.getCode() != tgtok::equal) {
2100 TokError("expected '=' in let expression");
2101 return std::vector<LetRecord>();
2103 Lex.Lex(); // eat the '='.
2105 Init *Val = ParseValue(0);
2106 if (Val == 0) return std::vector<LetRecord>();
2108 // Now that we have everything, add the record.
2109 Result.push_back(LetRecord(Name, Bits, Val, NameLoc));
2111 if (Lex.getCode() != tgtok::comma)
2113 Lex.Lex(); // eat the comma.
2117 /// ParseTopLevelLet - Parse a 'let' at top level. This can be a couple of
2118 /// different related productions. This works inside multiclasses too.
2120 /// Object ::= LET LetList IN '{' ObjectList '}'
2121 /// Object ::= LET LetList IN Object
2123 bool TGParser::ParseTopLevelLet(MultiClass *CurMultiClass) {
2124 assert(Lex.getCode() == tgtok::Let && "Unexpected token");
2127 // Add this entry to the let stack.
2128 std::vector<LetRecord> LetInfo = ParseLetList();
2129 if (LetInfo.empty()) return true;
2130 LetStack.push_back(LetInfo);
2132 if (Lex.getCode() != tgtok::In)
2133 return TokError("expected 'in' at end of top-level 'let'");
2136 // If this is a scalar let, just handle it now
2137 if (Lex.getCode() != tgtok::l_brace) {
2138 // LET LetList IN Object
2139 if (ParseObject(CurMultiClass))
2141 } else { // Object ::= LETCommand '{' ObjectList '}'
2142 SMLoc BraceLoc = Lex.getLoc();
2143 // Otherwise, this is a group let.
2144 Lex.Lex(); // eat the '{'.
2146 // Parse the object list.
2147 if (ParseObjectList(CurMultiClass))
2150 if (Lex.getCode() != tgtok::r_brace) {
2151 TokError("expected '}' at end of top level let command");
2152 return Error(BraceLoc, "to match this '{'");
2157 // Outside this let scope, this let block is not active.
2158 LetStack.pop_back();
2162 /// ParseMultiClass - Parse a multiclass definition.
2164 /// MultiClassInst ::= MULTICLASS ID TemplateArgList?
2165 /// ':' BaseMultiClassList '{' MultiClassDef+ '}'
2167 bool TGParser::ParseMultiClass() {
2168 assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");
2169 Lex.Lex(); // Eat the multiclass token.
2171 if (Lex.getCode() != tgtok::Id)
2172 return TokError("expected identifier after multiclass for name");
2173 std::string Name = Lex.getCurStrVal();
2175 if (MultiClasses.count(Name))
2176 return TokError("multiclass '" + Name + "' already defined");
2178 CurMultiClass = MultiClasses[Name] = new MultiClass(Name,
2179 Lex.getLoc(), Records);
2180 Lex.Lex(); // Eat the identifier.
2182 // If there are template args, parse them.
2183 if (Lex.getCode() == tgtok::less)
2184 if (ParseTemplateArgList(0))
2187 bool inherits = false;
2189 // If there are submulticlasses, parse them.
2190 if (Lex.getCode() == tgtok::colon) {
2195 // Read all of the submulticlasses.
2196 SubMultiClassReference SubMultiClass =
2197 ParseSubMultiClassReference(CurMultiClass);
2200 if (SubMultiClass.MC == 0) return true;
2203 if (AddSubMultiClass(CurMultiClass, SubMultiClass))
2206 if (Lex.getCode() != tgtok::comma) break;
2207 Lex.Lex(); // eat ','.
2208 SubMultiClass = ParseSubMultiClassReference(CurMultiClass);
2212 if (Lex.getCode() != tgtok::l_brace) {
2214 return TokError("expected '{' in multiclass definition");
2215 else if (Lex.getCode() != tgtok::semi)
2216 return TokError("expected ';' in multiclass definition");
2218 Lex.Lex(); // eat the ';'.
2220 if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
2221 return TokError("multiclass must contain at least one def");
2223 while (Lex.getCode() != tgtok::r_brace) {
2224 switch (Lex.getCode()) {
2226 return TokError("expected 'let', 'def' or 'defm' in multiclass body");
2230 case tgtok::Foreach:
2231 if (ParseObject(CurMultiClass))
2236 Lex.Lex(); // eat the '}'.
2244 InstantiateMulticlassDef(MultiClass &MC,
2247 SMLoc DefmPrefixLoc) {
2248 // We need to preserve DefProto so it can be reused for later
2249 // instantiations, so create a new Record to inherit from it.
2251 // Add in the defm name. If the defm prefix is empty, give each
2252 // instantiated def a unique name. Otherwise, if "#NAME#" exists in the
2253 // name, substitute the prefix for #NAME#. Otherwise, use the defm name
2256 if (DefmPrefix == 0)
2257 DefmPrefix = StringInit::get(GetNewAnonymousName());
2259 Init *DefName = DefProto->getNameInit();
2261 StringInit *DefNameString = dynamic_cast<StringInit *>(DefName);
2263 if (DefNameString != 0) {
2264 // We have a fully expanded string so there are no operators to
2265 // resolve. We should concatenate the given prefix and name.
2267 BinOpInit::get(BinOpInit::STRCONCAT,
2268 UnOpInit::get(UnOpInit::CAST, DefmPrefix,
2269 StringRecTy::get())->Fold(DefProto, &MC),
2270 DefName, StringRecTy::get())->Fold(DefProto, &MC);
2273 // Make a trail of SMLocs from the multiclass instantiations.
2274 SmallVector<SMLoc, 4> Locs(1, DefmPrefixLoc);
2275 Locs.append(DefProto->getLoc().begin(), DefProto->getLoc().end());
2276 Record *CurRec = new Record(DefName, Locs, Records);
2278 SubClassReference Ref;
2279 Ref.RefLoc = DefmPrefixLoc;
2281 AddSubClass(CurRec, Ref);
2283 // Set the value for NAME. We don't resolve references to it 'til later,
2284 // though, so that uses in nested multiclass names don't get
2286 if (SetValue(CurRec, Ref.RefLoc, "NAME", std::vector<unsigned>(),
2288 Error(DefmPrefixLoc, "Could not resolve "
2289 + CurRec->getNameInitAsString() + ":NAME to '"
2290 + DefmPrefix->getAsUnquotedString() + "'");
2294 // If the DefNameString didn't resolve, we probably have a reference to
2295 // NAME and need to replace it. We need to do at least this much greedily,
2296 // otherwise nested multiclasses will end up with incorrect NAME expansions.
2297 if (DefNameString == 0) {
2298 RecordVal *DefNameRV = CurRec->getValue("NAME");
2299 CurRec->resolveReferencesTo(DefNameRV);
2302 if (!CurMultiClass) {
2303 // Now that we're at the top level, resolve all NAME references
2304 // in the resultant defs that weren't in the def names themselves.
2305 RecordVal *DefNameRV = CurRec->getValue("NAME");
2306 CurRec->resolveReferencesTo(DefNameRV);
2308 // Now that NAME references are resolved and we're at the top level of
2309 // any multiclass expansions, add the record to the RecordKeeper. If we are
2310 // currently in a multiclass, it means this defm appears inside a
2311 // multiclass and its name won't be fully resolvable until we see
2312 // the top-level defm. Therefore, we don't add this to the
2313 // RecordKeeper at this point. If we did we could get duplicate
2314 // defs as more than one probably refers to NAME or some other
2315 // common internal placeholder.
2317 // Ensure redefinition doesn't happen.
2318 if (Records.getDef(CurRec->getNameInitAsString())) {
2319 Error(DefmPrefixLoc, "def '" + CurRec->getNameInitAsString() +
2320 "' already defined, instantiating defm with subdef '" +
2321 DefProto->getNameInitAsString() + "'");
2325 Records.addDef(CurRec);
2331 bool TGParser::ResolveMulticlassDefArgs(MultiClass &MC,
2333 SMLoc DefmPrefixLoc,
2335 const std::vector<Init *> &TArgs,
2336 std::vector<Init *> &TemplateVals,
2338 // Loop over all of the template arguments, setting them to the specified
2339 // value or leaving them as the default if necessary.
2340 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
2341 // Check if a value is specified for this temp-arg.
2342 if (i < TemplateVals.size()) {
2344 if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], std::vector<unsigned>(),
2349 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
2353 CurRec->removeValue(TArgs[i]);
2355 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
2356 return Error(SubClassLoc, "value not specified for template argument #"+
2357 utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
2358 + ") of multiclassclass '" + MC.Rec.getNameInitAsString()
2365 bool TGParser::ResolveMulticlassDef(MultiClass &MC,
2368 SMLoc DefmPrefixLoc) {
2369 // If the mdef is inside a 'let' expression, add to each def.
2370 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
2371 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
2372 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
2373 LetStack[i][j].Bits, LetStack[i][j].Value))
2374 return Error(DefmPrefixLoc, "when instantiating this defm");
2376 // Don't create a top level definition for defm inside multiclasses,
2377 // instead, only update the prototypes and bind the template args
2378 // with the new created definition.
2379 if (CurMultiClass) {
2380 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size();
2382 if (CurMultiClass->DefPrototypes[i]->getNameInit()
2383 == CurRec->getNameInit())
2384 return Error(DefmPrefixLoc, "defm '" + CurRec->getNameInitAsString() +
2385 "' already defined in this multiclass!");
2386 CurMultiClass->DefPrototypes.push_back(CurRec);
2388 // Copy the template arguments for the multiclass into the new def.
2389 const std::vector<Init *> &TA =
2390 CurMultiClass->Rec.getTemplateArgs();
2392 for (unsigned i = 0, e = TA.size(); i != e; ++i) {
2393 const RecordVal *RV = CurMultiClass->Rec.getValue(TA[i]);
2394 assert(RV && "Template arg doesn't exist?");
2395 CurRec->addValue(*RV);
2402 /// ParseDefm - Parse the instantiation of a multiclass.
2404 /// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
2406 bool TGParser::ParseDefm(MultiClass *CurMultiClass) {
2407 assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
2409 Init *DefmPrefix = 0;
2411 if (Lex.Lex() == tgtok::Id) { // eat the defm.
2412 DefmPrefix = ParseObjectName(CurMultiClass);
2415 SMLoc DefmPrefixLoc = Lex.getLoc();
2416 if (Lex.getCode() != tgtok::colon)
2417 return TokError("expected ':' after defm identifier");
2419 // Keep track of the new generated record definitions.
2420 std::vector<Record*> NewRecDefs;
2422 // This record also inherits from a regular class (non-multiclass)?
2423 bool InheritFromClass = false;
2428 SMLoc SubClassLoc = Lex.getLoc();
2429 SubClassReference Ref = ParseSubClassReference(0, true);
2432 if (Ref.Rec == 0) return true;
2434 // To instantiate a multiclass, we need to first get the multiclass, then
2435 // instantiate each def contained in the multiclass with the SubClassRef
2436 // template parameters.
2437 MultiClass *MC = MultiClasses[Ref.Rec->getName()];
2438 assert(MC && "Didn't lookup multiclass correctly?");
2439 std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
2441 // Verify that the correct number of template arguments were specified.
2442 const std::vector<Init *> &TArgs = MC->Rec.getTemplateArgs();
2443 if (TArgs.size() < TemplateVals.size())
2444 return Error(SubClassLoc,
2445 "more template args specified than multiclass expects");
2447 // Loop over all the def's in the multiclass, instantiating each one.
2448 for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
2449 Record *DefProto = MC->DefPrototypes[i];
2451 Record *CurRec = InstantiateMulticlassDef(*MC, DefProto, DefmPrefix, DefmPrefixLoc);
2455 if (ResolveMulticlassDefArgs(*MC, CurRec, DefmPrefixLoc, SubClassLoc,
2456 TArgs, TemplateVals, true/*Delete args*/))
2457 return Error(SubClassLoc, "could not instantiate def");
2459 if (ResolveMulticlassDef(*MC, CurRec, DefProto, DefmPrefixLoc))
2460 return Error(SubClassLoc, "could not instantiate def");
2462 NewRecDefs.push_back(CurRec);
2466 if (Lex.getCode() != tgtok::comma) break;
2467 Lex.Lex(); // eat ','.
2469 SubClassLoc = Lex.getLoc();
2471 // A defm can inherit from regular classes (non-multiclass) as
2472 // long as they come in the end of the inheritance list.
2473 InheritFromClass = (Records.getClass(Lex.getCurStrVal()) != 0);
2475 if (InheritFromClass)
2478 Ref = ParseSubClassReference(0, true);
2481 if (InheritFromClass) {
2482 // Process all the classes to inherit as if they were part of a
2483 // regular 'def' and inherit all record values.
2484 SubClassReference SubClass = ParseSubClassReference(0, false);
2487 if (SubClass.Rec == 0) return true;
2489 // Get the expanded definition prototypes and teach them about
2490 // the record values the current class to inherit has
2491 for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i) {
2492 Record *CurRec = NewRecDefs[i];
2495 if (AddSubClass(CurRec, SubClass))
2498 // Process any variables on the let stack.
2499 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
2500 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
2501 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
2502 LetStack[i][j].Bits, LetStack[i][j].Value))
2506 if (Lex.getCode() != tgtok::comma) break;
2507 Lex.Lex(); // eat ','.
2508 SubClass = ParseSubClassReference(0, false);
2513 for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i)
2514 // See Record::setName(). This resolve step will see any new
2515 // name for the def that might have been created when resolving
2516 // inheritance, values and arguments above.
2517 NewRecDefs[i]->resolveReferences();
2519 if (Lex.getCode() != tgtok::semi)
2520 return TokError("expected ';' at end of defm");
2527 /// Object ::= ClassInst
2528 /// Object ::= DefInst
2529 /// Object ::= MultiClassInst
2530 /// Object ::= DefMInst
2531 /// Object ::= LETCommand '{' ObjectList '}'
2532 /// Object ::= LETCommand Object
2533 bool TGParser::ParseObject(MultiClass *MC) {
2534 switch (Lex.getCode()) {
2536 return TokError("Expected class, def, defm, multiclass or let definition");
2537 case tgtok::Let: return ParseTopLevelLet(MC);
2538 case tgtok::Def: return ParseDef(MC);
2539 case tgtok::Foreach: return ParseForeach(MC);
2540 case tgtok::Defm: return ParseDefm(MC);
2541 case tgtok::Class: return ParseClass();
2542 case tgtok::MultiClass: return ParseMultiClass();
2547 /// ObjectList :== Object*
2548 bool TGParser::ParseObjectList(MultiClass *MC) {
2549 while (isObjectStart(Lex.getCode())) {
2550 if (ParseObject(MC))
2556 bool TGParser::ParseFile() {
2557 Lex.Lex(); // Prime the lexer.
2558 if (ParseObjectList()) return true;
2560 // If we have unread input at the end of the file, report it.
2561 if (Lex.getCode() == tgtok::Eof)
2564 return TokError("Unexpected input at top level");