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/ADT/SmallVector.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/TableGen/Record.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 = dyn_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 = dyn_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 return Error(Loc, "Initializer is not compatible with bit range");
116 // We should have a BitsInit type now.
117 BitsInit *BInit = dyn_cast<BitsInit>(BI);
120 SmallVector<Init *, 16> NewBits(CurVal->getNumBits());
122 // Loop over bits, assigning values as appropriate.
123 for (unsigned i = 0, e = BitList.size(); i != e; ++i) {
124 unsigned Bit = BitList[i];
126 return Error(Loc, "Cannot set bit #" + utostr(Bit) + " of value '" +
127 ValName->getAsUnquotedString() + "' more than once");
128 NewBits[Bit] = BInit->getBit(i);
131 for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
133 NewBits[i] = CurVal->getBit(i);
135 V = BitsInit::get(NewBits);
139 return Error(Loc, "Value '" + ValName->getAsUnquotedString() + "' of type '"
140 + RV->getType()->getAsString() +
141 "' is incompatible with initializer '" + V->getAsString()
146 /// AddSubClass - Add SubClass as a subclass to CurRec, resolving its template
147 /// args as SubClass's template arguments.
148 bool TGParser::AddSubClass(Record *CurRec, SubClassReference &SubClass) {
149 Record *SC = SubClass.Rec;
150 // Add all of the values in the subclass into the current class.
151 const std::vector<RecordVal> &Vals = SC->getValues();
152 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
153 if (AddValue(CurRec, SubClass.RefLoc, Vals[i]))
156 const std::vector<Init *> &TArgs = SC->getTemplateArgs();
158 // Ensure that an appropriate number of template arguments are specified.
159 if (TArgs.size() < SubClass.TemplateArgs.size())
160 return Error(SubClass.RefLoc, "More template args specified than expected");
162 // Loop over all of the template arguments, setting them to the specified
163 // value or leaving them as the default if necessary.
164 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
165 if (i < SubClass.TemplateArgs.size()) {
166 // If a value is specified for this template arg, set it now.
167 if (SetValue(CurRec, SubClass.RefLoc, TArgs[i], std::vector<unsigned>(),
168 SubClass.TemplateArgs[i]))
172 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
175 CurRec->removeValue(TArgs[i]);
177 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
178 return Error(SubClass.RefLoc,"Value not specified for template argument #"
179 + utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
180 + ") of subclass '" + SC->getNameInitAsString() + "'!");
184 // Since everything went well, we can now set the "superclass" list for the
186 const std::vector<Record*> &SCs = SC->getSuperClasses();
187 for (unsigned i = 0, e = SCs.size(); i != e; ++i) {
188 if (CurRec->isSubClassOf(SCs[i]))
189 return Error(SubClass.RefLoc,
190 "Already subclass of '" + SCs[i]->getName() + "'!\n");
191 CurRec->addSuperClass(SCs[i]);
194 if (CurRec->isSubClassOf(SC))
195 return Error(SubClass.RefLoc,
196 "Already subclass of '" + SC->getName() + "'!\n");
197 CurRec->addSuperClass(SC);
201 /// AddSubMultiClass - Add SubMultiClass as a subclass to
202 /// CurMC, resolving its template args as SubMultiClass's
203 /// template arguments.
204 bool TGParser::AddSubMultiClass(MultiClass *CurMC,
205 SubMultiClassReference &SubMultiClass) {
206 MultiClass *SMC = SubMultiClass.MC;
207 Record *CurRec = &CurMC->Rec;
209 const std::vector<RecordVal> &MCVals = CurRec->getValues();
211 // Add all of the values in the subclass into the current class.
212 const std::vector<RecordVal> &SMCVals = SMC->Rec.getValues();
213 for (unsigned i = 0, e = SMCVals.size(); i != e; ++i)
214 if (AddValue(CurRec, SubMultiClass.RefLoc, SMCVals[i]))
217 int newDefStart = CurMC->DefPrototypes.size();
219 // Add all of the defs in the subclass into the current multiclass.
220 for (MultiClass::RecordVector::const_iterator i = SMC->DefPrototypes.begin(),
221 iend = SMC->DefPrototypes.end();
224 // Clone the def and add it to the current multiclass
225 Record *NewDef = new Record(**i);
227 // Add all of the values in the superclass into the current def.
228 for (unsigned i = 0, e = MCVals.size(); i != e; ++i)
229 if (AddValue(NewDef, SubMultiClass.RefLoc, MCVals[i]))
232 CurMC->DefPrototypes.push_back(NewDef);
235 const std::vector<Init *> &SMCTArgs = SMC->Rec.getTemplateArgs();
237 // Ensure that an appropriate number of template arguments are
239 if (SMCTArgs.size() < SubMultiClass.TemplateArgs.size())
240 return Error(SubMultiClass.RefLoc,
241 "More template args specified than expected");
243 // Loop over all of the template arguments, setting them to the specified
244 // value or leaving them as the default if necessary.
245 for (unsigned i = 0, e = SMCTArgs.size(); i != e; ++i) {
246 if (i < SubMultiClass.TemplateArgs.size()) {
247 // If a value is specified for this template arg, set it in the
249 if (SetValue(CurRec, SubMultiClass.RefLoc, SMCTArgs[i],
250 std::vector<unsigned>(),
251 SubMultiClass.TemplateArgs[i]))
255 CurRec->resolveReferencesTo(CurRec->getValue(SMCTArgs[i]));
258 CurRec->removeValue(SMCTArgs[i]);
260 // If a value is specified for this template arg, set it in the
262 for (MultiClass::RecordVector::iterator j =
263 CurMC->DefPrototypes.begin() + newDefStart,
264 jend = CurMC->DefPrototypes.end();
269 if (SetValue(Def, SubMultiClass.RefLoc, SMCTArgs[i],
270 std::vector<unsigned>(),
271 SubMultiClass.TemplateArgs[i]))
275 Def->resolveReferencesTo(Def->getValue(SMCTArgs[i]));
278 Def->removeValue(SMCTArgs[i]);
280 } else if (!CurRec->getValue(SMCTArgs[i])->getValue()->isComplete()) {
281 return Error(SubMultiClass.RefLoc,
282 "Value not specified for template argument #"
283 + utostr(i) + " (" + SMCTArgs[i]->getAsUnquotedString()
284 + ") of subclass '" + SMC->Rec.getNameInitAsString() + "'!");
291 /// ProcessForeachDefs - Given a record, apply all of the variable
292 /// values in all surrounding foreach loops, creating new records for
293 /// each combination of values.
294 bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc) {
298 // We want to instantiate a new copy of CurRec for each combination
299 // of nested loop iterator values. We don't want top instantiate
300 // any copies until we have values for each loop iterator.
302 return ProcessForeachDefs(CurRec, Loc, IterVals);
305 /// ProcessForeachDefs - Given a record, a loop and a loop iterator,
306 /// apply each of the variable values in this loop and then process
308 bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals){
309 // Recursively build a tuple of iterator values.
310 if (IterVals.size() != Loops.size()) {
311 assert(IterVals.size() < Loops.size());
312 ForeachLoop &CurLoop = Loops[IterVals.size()];
313 ListInit *List = dyn_cast<ListInit>(CurLoop.ListValue);
315 Error(Loc, "Loop list is not a list");
319 // Process each value.
320 for (int64_t i = 0; i < List->getSize(); ++i) {
321 Init *ItemVal = List->resolveListElementReference(*CurRec, 0, i);
322 IterVals.push_back(IterRecord(CurLoop.IterVar, ItemVal));
323 if (ProcessForeachDefs(CurRec, Loc, IterVals))
330 // This is the bottom of the recursion. We have all of the iterator values
331 // for this point in the iteration space. Instantiate a new record to
332 // reflect this combination of values.
333 Record *IterRec = new Record(*CurRec);
335 // Set the iterator values now.
336 for (unsigned i = 0, e = IterVals.size(); i != e; ++i) {
337 VarInit *IterVar = IterVals[i].IterVar;
338 TypedInit *IVal = dyn_cast<TypedInit>(IterVals[i].IterValue);
340 Error(Loc, "foreach iterator value is untyped");
344 IterRec->addValue(RecordVal(IterVar->getName(), IVal->getType(), false));
346 if (SetValue(IterRec, Loc, IterVar->getName(),
347 std::vector<unsigned>(), IVal)) {
348 Error(Loc, "when instantiating this def");
353 IterRec->resolveReferencesTo(IterRec->getValue(IterVar->getName()));
356 IterRec->removeValue(IterVar->getName());
359 if (Records.getDef(IterRec->getNameInitAsString())) {
360 Error(Loc, "def already exists: " + IterRec->getNameInitAsString());
364 Records.addDef(IterRec);
365 IterRec->resolveReferences();
369 //===----------------------------------------------------------------------===//
371 //===----------------------------------------------------------------------===//
373 /// isObjectStart - Return true if this is a valid first token for an Object.
374 static bool isObjectStart(tgtok::TokKind K) {
375 return K == tgtok::Class || K == tgtok::Def ||
376 K == tgtok::Defm || K == tgtok::Let ||
377 K == tgtok::MultiClass || K == tgtok::Foreach;
380 static std::string GetNewAnonymousName() {
381 static unsigned AnonCounter = 0;
382 return "anonymous."+utostr(AnonCounter++);
385 /// ParseObjectName - If an object name is specified, return it. Otherwise,
387 /// ObjectName ::= Value [ '#' Value ]*
388 /// ObjectName ::= /*empty*/
390 Init *TGParser::ParseObjectName(MultiClass *CurMultiClass) {
391 switch (Lex.getCode()) {
395 // These are all of the tokens that can begin an object body.
396 // Some of these can also begin values but we disallow those cases
397 // because they are unlikely to be useful.
405 CurRec = &CurMultiClass->Rec;
409 const TypedInit *CurRecName = dyn_cast<TypedInit>(CurRec->getNameInit());
411 TokError("Record name is not typed!");
414 Type = CurRecName->getType();
417 return ParseValue(CurRec, Type, ParseNameMode);
420 /// ParseClassID - Parse and resolve a reference to a class name. This returns
425 Record *TGParser::ParseClassID() {
426 if (Lex.getCode() != tgtok::Id) {
427 TokError("expected name for ClassID");
431 Record *Result = Records.getClass(Lex.getCurStrVal());
433 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
439 /// ParseMultiClassID - Parse and resolve a reference to a multiclass name.
440 /// This returns null on error.
442 /// MultiClassID ::= ID
444 MultiClass *TGParser::ParseMultiClassID() {
445 if (Lex.getCode() != tgtok::Id) {
446 TokError("expected name for MultiClassID");
450 MultiClass *Result = MultiClasses[Lex.getCurStrVal()];
452 TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
458 /// ParseSubClassReference - Parse a reference to a subclass or to a templated
459 /// subclass. This returns a SubClassRefTy with a null Record* on error.
461 /// SubClassRef ::= ClassID
462 /// SubClassRef ::= ClassID '<' ValueList '>'
464 SubClassReference TGParser::
465 ParseSubClassReference(Record *CurRec, bool isDefm) {
466 SubClassReference Result;
467 Result.RefLoc = Lex.getLoc();
470 if (MultiClass *MC = ParseMultiClassID())
471 Result.Rec = &MC->Rec;
473 Result.Rec = ParseClassID();
475 if (Result.Rec == 0) return Result;
477 // If there is no template arg list, we're done.
478 if (Lex.getCode() != tgtok::less)
480 Lex.Lex(); // Eat the '<'
482 if (Lex.getCode() == tgtok::greater) {
483 TokError("subclass reference requires a non-empty list of template values");
488 Result.TemplateArgs = ParseValueList(CurRec, Result.Rec);
489 if (Result.TemplateArgs.empty()) {
490 Result.Rec = 0; // Error parsing value list.
494 if (Lex.getCode() != tgtok::greater) {
495 TokError("expected '>' in template value list");
504 /// ParseSubMultiClassReference - Parse a reference to a subclass or to a
505 /// templated submulticlass. This returns a SubMultiClassRefTy with a null
506 /// Record* on error.
508 /// SubMultiClassRef ::= MultiClassID
509 /// SubMultiClassRef ::= MultiClassID '<' ValueList '>'
511 SubMultiClassReference TGParser::
512 ParseSubMultiClassReference(MultiClass *CurMC) {
513 SubMultiClassReference Result;
514 Result.RefLoc = Lex.getLoc();
516 Result.MC = ParseMultiClassID();
517 if (Result.MC == 0) return Result;
519 // If there is no template arg list, we're done.
520 if (Lex.getCode() != tgtok::less)
522 Lex.Lex(); // Eat the '<'
524 if (Lex.getCode() == tgtok::greater) {
525 TokError("subclass reference requires a non-empty list of template values");
530 Result.TemplateArgs = ParseValueList(&CurMC->Rec, &Result.MC->Rec);
531 if (Result.TemplateArgs.empty()) {
532 Result.MC = 0; // Error parsing value list.
536 if (Lex.getCode() != tgtok::greater) {
537 TokError("expected '>' in template value list");
546 /// ParseRangePiece - Parse a bit/value range.
547 /// RangePiece ::= INTVAL
548 /// RangePiece ::= INTVAL '-' INTVAL
549 /// RangePiece ::= INTVAL INTVAL
550 bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
551 if (Lex.getCode() != tgtok::IntVal) {
552 TokError("expected integer or bitrange");
555 int64_t Start = Lex.getCurIntVal();
559 return TokError("invalid range, cannot be negative");
561 switch (Lex.Lex()) { // eat first character.
563 Ranges.push_back(Start);
566 if (Lex.Lex() != tgtok::IntVal) {
567 TokError("expected integer value as end of range");
570 End = Lex.getCurIntVal();
573 End = -Lex.getCurIntVal();
577 return TokError("invalid range, cannot be negative");
582 for (; Start <= End; ++Start)
583 Ranges.push_back(Start);
585 for (; Start >= End; --Start)
586 Ranges.push_back(Start);
591 /// ParseRangeList - Parse a list of scalars and ranges into scalar values.
593 /// RangeList ::= RangePiece (',' RangePiece)*
595 std::vector<unsigned> TGParser::ParseRangeList() {
596 std::vector<unsigned> Result;
598 // Parse the first piece.
599 if (ParseRangePiece(Result))
600 return std::vector<unsigned>();
601 while (Lex.getCode() == tgtok::comma) {
602 Lex.Lex(); // Eat the comma.
604 // Parse the next range piece.
605 if (ParseRangePiece(Result))
606 return std::vector<unsigned>();
611 /// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
612 /// OptionalRangeList ::= '<' RangeList '>'
613 /// OptionalRangeList ::= /*empty*/
614 bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
615 if (Lex.getCode() != tgtok::less)
618 SMLoc StartLoc = Lex.getLoc();
619 Lex.Lex(); // eat the '<'
621 // Parse the range list.
622 Ranges = ParseRangeList();
623 if (Ranges.empty()) return true;
625 if (Lex.getCode() != tgtok::greater) {
626 TokError("expected '>' at end of range list");
627 return Error(StartLoc, "to match this '<'");
629 Lex.Lex(); // eat the '>'.
633 /// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
634 /// OptionalBitList ::= '{' RangeList '}'
635 /// OptionalBitList ::= /*empty*/
636 bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
637 if (Lex.getCode() != tgtok::l_brace)
640 SMLoc StartLoc = Lex.getLoc();
641 Lex.Lex(); // eat the '{'
643 // Parse the range list.
644 Ranges = ParseRangeList();
645 if (Ranges.empty()) return true;
647 if (Lex.getCode() != tgtok::r_brace) {
648 TokError("expected '}' at end of bit list");
649 return Error(StartLoc, "to match this '{'");
651 Lex.Lex(); // eat the '}'.
656 /// ParseType - Parse and return a tblgen type. This returns null on error.
658 /// Type ::= STRING // string type
659 /// Type ::= CODE // code type
660 /// Type ::= BIT // bit type
661 /// Type ::= BITS '<' INTVAL '>' // bits<x> type
662 /// Type ::= INT // int type
663 /// Type ::= LIST '<' Type '>' // list<x> type
664 /// Type ::= DAG // dag type
665 /// Type ::= ClassID // Record Type
667 RecTy *TGParser::ParseType() {
668 switch (Lex.getCode()) {
669 default: TokError("Unknown token when expecting a type"); return 0;
670 case tgtok::String: Lex.Lex(); return StringRecTy::get();
671 case tgtok::Code: Lex.Lex(); return StringRecTy::get();
672 case tgtok::Bit: Lex.Lex(); return BitRecTy::get();
673 case tgtok::Int: Lex.Lex(); return IntRecTy::get();
674 case tgtok::Dag: Lex.Lex(); return DagRecTy::get();
676 if (Record *R = ParseClassID()) return RecordRecTy::get(R);
679 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
680 TokError("expected '<' after bits type");
683 if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
684 TokError("expected integer in bits<n> type");
687 uint64_t Val = Lex.getCurIntVal();
688 if (Lex.Lex() != tgtok::greater) { // Eat count.
689 TokError("expected '>' at end of bits<n> type");
692 Lex.Lex(); // Eat '>'
693 return BitsRecTy::get(Val);
696 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
697 TokError("expected '<' after list type");
700 Lex.Lex(); // Eat '<'
701 RecTy *SubType = ParseType();
702 if (SubType == 0) return 0;
704 if (Lex.getCode() != tgtok::greater) {
705 TokError("expected '>' at end of list<ty> type");
708 Lex.Lex(); // Eat '>'
709 return ListRecTy::get(SubType);
714 /// ParseIDValue - Parse an ID as a value and decode what it means.
716 /// IDValue ::= ID [def local value]
717 /// IDValue ::= ID [def template arg]
718 /// IDValue ::= ID [multiclass local value]
719 /// IDValue ::= ID [multiclass template argument]
720 /// IDValue ::= ID [def name]
722 Init *TGParser::ParseIDValue(Record *CurRec, IDParseMode Mode) {
723 assert(Lex.getCode() == tgtok::Id && "Expected ID in ParseIDValue");
724 std::string Name = Lex.getCurStrVal();
725 SMLoc Loc = Lex.getLoc();
727 return ParseIDValue(CurRec, Name, Loc);
730 /// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
731 /// has already been read.
732 Init *TGParser::ParseIDValue(Record *CurRec,
733 const std::string &Name, SMLoc NameLoc,
736 if (const RecordVal *RV = CurRec->getValue(Name))
737 return VarInit::get(Name, RV->getType());
739 Init *TemplateArgName = QualifyName(*CurRec, CurMultiClass, Name, ":");
742 TemplateArgName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
745 if (CurRec->isTemplateArg(TemplateArgName)) {
746 const RecordVal *RV = CurRec->getValue(TemplateArgName);
747 assert(RV && "Template arg doesn't exist??");
748 return VarInit::get(TemplateArgName, RV->getType());
753 Init *MCName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
756 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
757 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
758 assert(RV && "Template arg doesn't exist??");
759 return VarInit::get(MCName, RV->getType());
763 // If this is in a foreach loop, make sure it's not a loop iterator
764 for (LoopVector::iterator i = Loops.begin(), iend = Loops.end();
767 VarInit *IterVar = dyn_cast<VarInit>(i->IterVar);
768 if (IterVar && IterVar->getName() == Name)
772 if (Mode == ParseNameMode)
773 return StringInit::get(Name);
775 if (Record *D = Records.getDef(Name))
776 return DefInit::get(D);
778 if (Mode == ParseValueMode) {
779 Error(NameLoc, "Variable not defined: '" + Name + "'");
783 return StringInit::get(Name);
786 /// ParseOperation - Parse an operator. This returns null on error.
788 /// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
790 Init *TGParser::ParseOperation(Record *CurRec) {
791 switch (Lex.getCode()) {
793 TokError("unknown operation");
798 case tgtok::XCast: { // Value ::= !unop '(' Value ')'
799 UnOpInit::UnaryOp Code;
802 switch (Lex.getCode()) {
803 default: llvm_unreachable("Unhandled code!");
805 Lex.Lex(); // eat the operation
806 Code = UnOpInit::CAST;
808 Type = ParseOperatorType();
811 TokError("did not get type for unary operator");
817 Lex.Lex(); // eat the operation
818 Code = UnOpInit::HEAD;
821 Lex.Lex(); // eat the operation
822 Code = UnOpInit::TAIL;
825 Lex.Lex(); // eat the operation
826 Code = UnOpInit::EMPTY;
827 Type = IntRecTy::get();
830 if (Lex.getCode() != tgtok::l_paren) {
831 TokError("expected '(' after unary operator");
834 Lex.Lex(); // eat the '('
836 Init *LHS = ParseValue(CurRec);
837 if (LHS == 0) return 0;
839 if (Code == UnOpInit::HEAD
840 || Code == UnOpInit::TAIL
841 || Code == UnOpInit::EMPTY) {
842 ListInit *LHSl = dyn_cast<ListInit>(LHS);
843 StringInit *LHSs = dyn_cast<StringInit>(LHS);
844 TypedInit *LHSt = dyn_cast<TypedInit>(LHS);
845 if (LHSl == 0 && LHSs == 0 && LHSt == 0) {
846 TokError("expected list or string type argument in unary operator");
850 ListRecTy *LType = dyn_cast<ListRecTy>(LHSt->getType());
851 StringRecTy *SType = dyn_cast<StringRecTy>(LHSt->getType());
852 if (LType == 0 && SType == 0) {
853 TokError("expected list or string type argumnet in unary operator");
858 if (Code == UnOpInit::HEAD
859 || Code == UnOpInit::TAIL) {
860 if (LHSl == 0 && LHSt == 0) {
861 TokError("expected list type argumnet in unary operator");
865 if (LHSl && LHSl->getSize() == 0) {
866 TokError("empty list argument in unary operator");
870 Init *Item = LHSl->getElement(0);
871 TypedInit *Itemt = dyn_cast<TypedInit>(Item);
873 TokError("untyped list element in unary operator");
876 if (Code == UnOpInit::HEAD) {
877 Type = Itemt->getType();
879 Type = ListRecTy::get(Itemt->getType());
882 assert(LHSt && "expected list type argument in unary operator");
883 ListRecTy *LType = dyn_cast<ListRecTy>(LHSt->getType());
885 TokError("expected list type argumnet in unary operator");
888 if (Code == UnOpInit::HEAD) {
889 Type = LType->getElementType();
897 if (Lex.getCode() != tgtok::r_paren) {
898 TokError("expected ')' in unary operator");
901 Lex.Lex(); // eat the ')'
902 return (UnOpInit::get(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
910 case tgtok::XStrConcat: { // Value ::= !binop '(' Value ',' Value ')'
911 tgtok::TokKind OpTok = Lex.getCode();
912 SMLoc OpLoc = Lex.getLoc();
913 Lex.Lex(); // eat the operation
915 BinOpInit::BinaryOp Code;
919 default: llvm_unreachable("Unhandled code!");
920 case tgtok::XConcat: Code = BinOpInit::CONCAT;Type = DagRecTy::get(); break;
921 case tgtok::XSRA: Code = BinOpInit::SRA; Type = IntRecTy::get(); break;
922 case tgtok::XSRL: Code = BinOpInit::SRL; Type = IntRecTy::get(); break;
923 case tgtok::XSHL: Code = BinOpInit::SHL; Type = IntRecTy::get(); break;
924 case tgtok::XEq: Code = BinOpInit::EQ; Type = BitRecTy::get(); break;
925 case tgtok::XStrConcat:
926 Code = BinOpInit::STRCONCAT;
927 Type = StringRecTy::get();
931 if (Lex.getCode() != tgtok::l_paren) {
932 TokError("expected '(' after binary operator");
935 Lex.Lex(); // eat the '('
937 SmallVector<Init*, 2> InitList;
939 InitList.push_back(ParseValue(CurRec));
940 if (InitList.back() == 0) return 0;
942 while (Lex.getCode() == tgtok::comma) {
943 Lex.Lex(); // eat the ','
945 InitList.push_back(ParseValue(CurRec));
946 if (InitList.back() == 0) return 0;
949 if (Lex.getCode() != tgtok::r_paren) {
950 TokError("expected ')' in operator");
953 Lex.Lex(); // eat the ')'
955 // We allow multiple operands to associative operators like !strconcat as
956 // shorthand for nesting them.
957 if (Code == BinOpInit::STRCONCAT) {
958 while (InitList.size() > 2) {
959 Init *RHS = InitList.pop_back_val();
960 RHS = (BinOpInit::get(Code, InitList.back(), RHS, Type))
961 ->Fold(CurRec, CurMultiClass);
962 InitList.back() = RHS;
966 if (InitList.size() == 2)
967 return (BinOpInit::get(Code, InitList[0], InitList[1], Type))
968 ->Fold(CurRec, CurMultiClass);
970 Error(OpLoc, "expected two operands to operator");
975 case tgtok::XForEach:
976 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
977 TernOpInit::TernaryOp Code;
980 tgtok::TokKind LexCode = Lex.getCode();
981 Lex.Lex(); // eat the operation
983 default: llvm_unreachable("Unhandled code!");
985 Code = TernOpInit::IF;
987 case tgtok::XForEach:
988 Code = TernOpInit::FOREACH;
991 Code = TernOpInit::SUBST;
994 if (Lex.getCode() != tgtok::l_paren) {
995 TokError("expected '(' after ternary operator");
998 Lex.Lex(); // eat the '('
1000 Init *LHS = ParseValue(CurRec);
1001 if (LHS == 0) return 0;
1003 if (Lex.getCode() != tgtok::comma) {
1004 TokError("expected ',' in ternary operator");
1007 Lex.Lex(); // eat the ','
1009 Init *MHS = ParseValue(CurRec);
1010 if (MHS == 0) return 0;
1012 if (Lex.getCode() != tgtok::comma) {
1013 TokError("expected ',' in ternary operator");
1016 Lex.Lex(); // eat the ','
1018 Init *RHS = ParseValue(CurRec);
1019 if (RHS == 0) return 0;
1021 if (Lex.getCode() != tgtok::r_paren) {
1022 TokError("expected ')' in binary operator");
1025 Lex.Lex(); // eat the ')'
1028 default: llvm_unreachable("Unhandled code!");
1033 if (TypedInit *MHSt = dyn_cast<TypedInit>(MHS))
1034 MHSTy = MHSt->getType();
1035 if (BitsInit *MHSbits = dyn_cast<BitsInit>(MHS))
1036 MHSTy = BitsRecTy::get(MHSbits->getNumBits());
1037 if (isa<BitInit>(MHS))
1038 MHSTy = BitRecTy::get();
1040 if (TypedInit *RHSt = dyn_cast<TypedInit>(RHS))
1041 RHSTy = RHSt->getType();
1042 if (BitsInit *RHSbits = dyn_cast<BitsInit>(RHS))
1043 RHSTy = BitsRecTy::get(RHSbits->getNumBits());
1044 if (isa<BitInit>(RHS))
1045 RHSTy = BitRecTy::get();
1047 // For UnsetInit, it's typed from the other hand.
1048 if (isa<UnsetInit>(MHS))
1050 if (isa<UnsetInit>(RHS))
1053 if (!MHSTy || !RHSTy) {
1054 TokError("could not get type for !if");
1058 if (MHSTy->typeIsConvertibleTo(RHSTy)) {
1060 } else if (RHSTy->typeIsConvertibleTo(MHSTy)) {
1063 TokError("inconsistent types for !if");
1068 case tgtok::XForEach: {
1069 TypedInit *MHSt = dyn_cast<TypedInit>(MHS);
1071 TokError("could not get type for !foreach");
1074 Type = MHSt->getType();
1077 case tgtok::XSubst: {
1078 TypedInit *RHSt = dyn_cast<TypedInit>(RHS);
1080 TokError("could not get type for !subst");
1083 Type = RHSt->getType();
1087 return (TernOpInit::get(Code, LHS, MHS, RHS, Type))->Fold(CurRec,
1093 /// ParseOperatorType - Parse a type for an operator. This returns
1096 /// OperatorType ::= '<' Type '>'
1098 RecTy *TGParser::ParseOperatorType() {
1101 if (Lex.getCode() != tgtok::less) {
1102 TokError("expected type name for operator");
1105 Lex.Lex(); // eat the <
1110 TokError("expected type name for operator");
1114 if (Lex.getCode() != tgtok::greater) {
1115 TokError("expected type name for operator");
1118 Lex.Lex(); // eat the >
1124 /// ParseSimpleValue - Parse a tblgen value. This returns null on error.
1126 /// SimpleValue ::= IDValue
1127 /// SimpleValue ::= INTVAL
1128 /// SimpleValue ::= STRVAL+
1129 /// SimpleValue ::= CODEFRAGMENT
1130 /// SimpleValue ::= '?'
1131 /// SimpleValue ::= '{' ValueList '}'
1132 /// SimpleValue ::= ID '<' ValueListNE '>'
1133 /// SimpleValue ::= '[' ValueList ']'
1134 /// SimpleValue ::= '(' IDValue DagArgList ')'
1135 /// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
1136 /// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
1137 /// SimpleValue ::= SRATOK '(' Value ',' Value ')'
1138 /// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
1139 /// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
1141 Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType,
1144 switch (Lex.getCode()) {
1145 default: TokError("Unknown token when parsing a value"); break;
1147 // This is a leading paste operation. This is deprecated but
1148 // still exists in some .td files. Ignore it.
1149 Lex.Lex(); // Skip '#'.
1150 return ParseSimpleValue(CurRec, ItemType, Mode);
1151 case tgtok::IntVal: R = IntInit::get(Lex.getCurIntVal()); Lex.Lex(); break;
1152 case tgtok::StrVal: {
1153 std::string Val = Lex.getCurStrVal();
1156 // Handle multiple consecutive concatenated strings.
1157 while (Lex.getCode() == tgtok::StrVal) {
1158 Val += Lex.getCurStrVal();
1162 R = StringInit::get(Val);
1165 case tgtok::CodeFragment:
1166 R = StringInit::get(Lex.getCurStrVal());
1169 case tgtok::question:
1170 R = UnsetInit::get();
1174 SMLoc NameLoc = Lex.getLoc();
1175 std::string Name = Lex.getCurStrVal();
1176 if (Lex.Lex() != tgtok::less) // consume the Id.
1177 return ParseIDValue(CurRec, Name, NameLoc, Mode); // Value ::= IDValue
1179 // Value ::= ID '<' ValueListNE '>'
1180 if (Lex.Lex() == tgtok::greater) {
1181 TokError("expected non-empty value list");
1185 // This is a CLASS<initvalslist> expression. This is supposed to synthesize
1186 // a new anonymous definition, deriving from CLASS<initvalslist> with no
1188 Record *Class = Records.getClass(Name);
1190 Error(NameLoc, "Expected a class name, got '" + Name + "'");
1194 std::vector<Init*> ValueList = ParseValueList(CurRec, Class);
1195 if (ValueList.empty()) return 0;
1197 if (Lex.getCode() != tgtok::greater) {
1198 TokError("expected '>' at end of value list");
1201 Lex.Lex(); // eat the '>'
1203 // Create the new record, set it as CurRec temporarily.
1204 static unsigned AnonCounter = 0;
1205 Record *NewRec = new Record("anonymous.val."+utostr(AnonCounter++),
1208 /*IsAnonymous=*/true);
1209 SubClassReference SCRef;
1210 SCRef.RefLoc = NameLoc;
1212 SCRef.TemplateArgs = ValueList;
1213 // Add info about the subclass to NewRec.
1214 if (AddSubClass(NewRec, SCRef))
1216 NewRec->resolveReferences();
1217 Records.addDef(NewRec);
1219 // The result of the expression is a reference to the new record.
1220 return DefInit::get(NewRec);
1222 case tgtok::l_brace: { // Value ::= '{' ValueList '}'
1223 SMLoc BraceLoc = Lex.getLoc();
1224 Lex.Lex(); // eat the '{'
1225 std::vector<Init*> Vals;
1227 if (Lex.getCode() != tgtok::r_brace) {
1228 Vals = ParseValueList(CurRec);
1229 if (Vals.empty()) return 0;
1231 if (Lex.getCode() != tgtok::r_brace) {
1232 TokError("expected '}' at end of bit list value");
1235 Lex.Lex(); // eat the '}'
1237 SmallVector<Init *, 16> NewBits(Vals.size());
1239 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1240 Init *Bit = Vals[i]->convertInitializerTo(BitRecTy::get());
1242 Error(BraceLoc, "Element #" + utostr(i) + " (" + Vals[i]->getAsString()+
1243 ") is not convertable to a bit");
1246 NewBits[Vals.size()-i-1] = Bit;
1248 return BitsInit::get(NewBits);
1250 case tgtok::l_square: { // Value ::= '[' ValueList ']'
1251 Lex.Lex(); // eat the '['
1252 std::vector<Init*> Vals;
1254 RecTy *DeducedEltTy = 0;
1255 ListRecTy *GivenListTy = 0;
1257 if (ItemType != 0) {
1258 ListRecTy *ListType = dyn_cast<ListRecTy>(ItemType);
1259 if (ListType == 0) {
1260 std::stringstream s;
1261 s << "Type mismatch for list, expected list type, got "
1262 << ItemType->getAsString();
1266 GivenListTy = ListType;
1269 if (Lex.getCode() != tgtok::r_square) {
1270 Vals = ParseValueList(CurRec, 0,
1271 GivenListTy ? GivenListTy->getElementType() : 0);
1272 if (Vals.empty()) return 0;
1274 if (Lex.getCode() != tgtok::r_square) {
1275 TokError("expected ']' at end of list value");
1278 Lex.Lex(); // eat the ']'
1280 RecTy *GivenEltTy = 0;
1281 if (Lex.getCode() == tgtok::less) {
1282 // Optional list element type
1283 Lex.Lex(); // eat the '<'
1285 GivenEltTy = ParseType();
1286 if (GivenEltTy == 0) {
1287 // Couldn't parse element type
1291 if (Lex.getCode() != tgtok::greater) {
1292 TokError("expected '>' at end of list element type");
1295 Lex.Lex(); // eat the '>'
1300 for (std::vector<Init *>::iterator i = Vals.begin(), ie = Vals.end();
1303 TypedInit *TArg = dyn_cast<TypedInit>(*i);
1305 TokError("Untyped list element");
1309 EltTy = resolveTypes(EltTy, TArg->getType());
1311 TokError("Incompatible types in list elements");
1315 EltTy = TArg->getType();
1319 if (GivenEltTy != 0) {
1321 // Verify consistency
1322 if (!EltTy->typeIsConvertibleTo(GivenEltTy)) {
1323 TokError("Incompatible types in list elements");
1331 if (ItemType == 0) {
1332 TokError("No type for list");
1335 DeducedEltTy = GivenListTy->getElementType();
1337 // Make sure the deduced type is compatible with the given type
1339 if (!EltTy->typeIsConvertibleTo(GivenListTy->getElementType())) {
1340 TokError("Element type mismatch for list");
1344 DeducedEltTy = EltTy;
1347 return ListInit::get(Vals, DeducedEltTy);
1349 case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
1350 Lex.Lex(); // eat the '('
1351 if (Lex.getCode() != tgtok::Id && Lex.getCode() != tgtok::XCast) {
1352 TokError("expected identifier in dag init");
1356 Init *Operator = ParseValue(CurRec);
1357 if (Operator == 0) return 0;
1359 // If the operator name is present, parse it.
1360 std::string OperatorName;
1361 if (Lex.getCode() == tgtok::colon) {
1362 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1363 TokError("expected variable name in dag operator");
1366 OperatorName = Lex.getCurStrVal();
1367 Lex.Lex(); // eat the VarName.
1370 std::vector<std::pair<llvm::Init*, std::string> > DagArgs;
1371 if (Lex.getCode() != tgtok::r_paren) {
1372 DagArgs = ParseDagArgList(CurRec);
1373 if (DagArgs.empty()) return 0;
1376 if (Lex.getCode() != tgtok::r_paren) {
1377 TokError("expected ')' in dag init");
1380 Lex.Lex(); // eat the ')'
1382 return DagInit::get(Operator, OperatorName, DagArgs);
1388 case tgtok::XCast: // Value ::= !unop '(' Value ')'
1389 case tgtok::XConcat:
1394 case tgtok::XStrConcat: // Value ::= !binop '(' Value ',' Value ')'
1396 case tgtok::XForEach:
1397 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
1398 return ParseOperation(CurRec);
1405 /// ParseValue - Parse a tblgen value. This returns null on error.
1407 /// Value ::= SimpleValue ValueSuffix*
1408 /// ValueSuffix ::= '{' BitList '}'
1409 /// ValueSuffix ::= '[' BitList ']'
1410 /// ValueSuffix ::= '.' ID
1412 Init *TGParser::ParseValue(Record *CurRec, RecTy *ItemType, IDParseMode Mode) {
1413 Init *Result = ParseSimpleValue(CurRec, ItemType, Mode);
1414 if (Result == 0) return 0;
1416 // Parse the suffixes now if present.
1418 switch (Lex.getCode()) {
1419 default: return Result;
1420 case tgtok::l_brace: {
1421 if (Mode == ParseNameMode || Mode == ParseForeachMode)
1422 // This is the beginning of the object body.
1425 SMLoc CurlyLoc = Lex.getLoc();
1426 Lex.Lex(); // eat the '{'
1427 std::vector<unsigned> Ranges = ParseRangeList();
1428 if (Ranges.empty()) return 0;
1430 // Reverse the bitlist.
1431 std::reverse(Ranges.begin(), Ranges.end());
1432 Result = Result->convertInitializerBitRange(Ranges);
1434 Error(CurlyLoc, "Invalid bit range for value");
1439 if (Lex.getCode() != tgtok::r_brace) {
1440 TokError("expected '}' at end of bit range list");
1446 case tgtok::l_square: {
1447 SMLoc SquareLoc = Lex.getLoc();
1448 Lex.Lex(); // eat the '['
1449 std::vector<unsigned> Ranges = ParseRangeList();
1450 if (Ranges.empty()) return 0;
1452 Result = Result->convertInitListSlice(Ranges);
1454 Error(SquareLoc, "Invalid range for list slice");
1459 if (Lex.getCode() != tgtok::r_square) {
1460 TokError("expected ']' at end of list slice");
1467 if (Lex.Lex() != tgtok::Id) { // eat the .
1468 TokError("expected field identifier after '.'");
1471 if (!Result->getFieldType(Lex.getCurStrVal())) {
1472 TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
1473 Result->getAsString() + "'");
1476 Result = FieldInit::get(Result, Lex.getCurStrVal());
1477 Lex.Lex(); // eat field name
1481 SMLoc PasteLoc = Lex.getLoc();
1483 // Create a !strconcat() operation, first casting each operand to
1484 // a string if necessary.
1486 TypedInit *LHS = dyn_cast<TypedInit>(Result);
1488 Error(PasteLoc, "LHS of paste is not typed!");
1492 if (LHS->getType() != StringRecTy::get()) {
1493 LHS = UnOpInit::get(UnOpInit::CAST, LHS, StringRecTy::get());
1498 Lex.Lex(); // Eat the '#'.
1499 switch (Lex.getCode()) {
1502 case tgtok::l_brace:
1503 // These are all of the tokens that can begin an object body.
1504 // Some of these can also begin values but we disallow those cases
1505 // because they are unlikely to be useful.
1507 // Trailing paste, concat with an empty string.
1508 RHS = StringInit::get("");
1512 Init *RHSResult = ParseValue(CurRec, ItemType, ParseNameMode);
1513 RHS = dyn_cast<TypedInit>(RHSResult);
1515 Error(PasteLoc, "RHS of paste is not typed!");
1519 if (RHS->getType() != StringRecTy::get()) {
1520 RHS = UnOpInit::get(UnOpInit::CAST, RHS, StringRecTy::get());
1526 Result = BinOpInit::get(BinOpInit::STRCONCAT, LHS, RHS,
1527 StringRecTy::get())->Fold(CurRec, CurMultiClass);
1533 /// ParseDagArgList - Parse the argument list for a dag literal expression.
1535 /// ParseDagArgList ::= Value (':' VARNAME)?
1536 /// ParseDagArgList ::= ParseDagArgList ',' Value (':' VARNAME)?
1537 std::vector<std::pair<llvm::Init*, std::string> >
1538 TGParser::ParseDagArgList(Record *CurRec) {
1539 std::vector<std::pair<llvm::Init*, std::string> > Result;
1542 Init *Val = ParseValue(CurRec);
1543 if (Val == 0) return std::vector<std::pair<llvm::Init*, std::string> >();
1545 // If the variable name is present, add it.
1546 std::string VarName;
1547 if (Lex.getCode() == tgtok::colon) {
1548 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1549 TokError("expected variable name in dag literal");
1550 return std::vector<std::pair<llvm::Init*, std::string> >();
1552 VarName = Lex.getCurStrVal();
1553 Lex.Lex(); // eat the VarName.
1556 Result.push_back(std::make_pair(Val, VarName));
1558 if (Lex.getCode() != tgtok::comma) break;
1559 Lex.Lex(); // eat the ','
1566 /// ParseValueList - Parse a comma separated list of values, returning them as a
1567 /// vector. Note that this always expects to be able to parse at least one
1568 /// value. It returns an empty list if this is not possible.
1570 /// ValueList ::= Value (',' Value)
1572 std::vector<Init*> TGParser::ParseValueList(Record *CurRec, Record *ArgsRec,
1574 std::vector<Init*> Result;
1575 RecTy *ItemType = EltTy;
1576 unsigned int ArgN = 0;
1577 if (ArgsRec != 0 && EltTy == 0) {
1578 const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
1579 if (!TArgs.size()) {
1580 TokError("template argument provided to non-template class");
1581 return std::vector<Init*>();
1583 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1585 errs() << "Cannot find template arg " << ArgN << " (" << TArgs[ArgN]
1588 assert(RV && "Template argument record not found??");
1589 ItemType = RV->getType();
1592 Result.push_back(ParseValue(CurRec, ItemType));
1593 if (Result.back() == 0) return std::vector<Init*>();
1595 while (Lex.getCode() == tgtok::comma) {
1596 Lex.Lex(); // Eat the comma
1598 if (ArgsRec != 0 && EltTy == 0) {
1599 const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
1600 if (ArgN >= TArgs.size()) {
1601 TokError("too many template arguments");
1602 return std::vector<Init*>();
1604 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1605 assert(RV && "Template argument record not found??");
1606 ItemType = RV->getType();
1609 Result.push_back(ParseValue(CurRec, ItemType));
1610 if (Result.back() == 0) return std::vector<Init*>();
1617 /// ParseDeclaration - Read a declaration, returning the name of field ID, or an
1618 /// empty string on error. This can happen in a number of different context's,
1619 /// including within a def or in the template args for a def (which which case
1620 /// CurRec will be non-null) and within the template args for a multiclass (in
1621 /// which case CurRec will be null, but CurMultiClass will be set). This can
1622 /// also happen within a def that is within a multiclass, which will set both
1623 /// CurRec and CurMultiClass.
1625 /// Declaration ::= FIELD? Type ID ('=' Value)?
1627 Init *TGParser::ParseDeclaration(Record *CurRec,
1628 bool ParsingTemplateArgs) {
1629 // Read the field prefix if present.
1630 bool HasField = Lex.getCode() == tgtok::Field;
1631 if (HasField) Lex.Lex();
1633 RecTy *Type = ParseType();
1634 if (Type == 0) return 0;
1636 if (Lex.getCode() != tgtok::Id) {
1637 TokError("Expected identifier in declaration");
1641 SMLoc IdLoc = Lex.getLoc();
1642 Init *DeclName = StringInit::get(Lex.getCurStrVal());
1645 if (ParsingTemplateArgs) {
1647 DeclName = QualifyName(*CurRec, CurMultiClass, DeclName, ":");
1649 assert(CurMultiClass);
1652 DeclName = QualifyName(CurMultiClass->Rec, CurMultiClass, DeclName,
1657 if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
1660 // If a value is present, parse it.
1661 if (Lex.getCode() == tgtok::equal) {
1663 SMLoc ValLoc = Lex.getLoc();
1664 Init *Val = ParseValue(CurRec, Type);
1666 SetValue(CurRec, ValLoc, DeclName, std::vector<unsigned>(), Val))
1673 /// ParseForeachDeclaration - Read a foreach declaration, returning
1674 /// the name of the declared object or a NULL Init on error. Return
1675 /// the name of the parsed initializer list through ForeachListName.
1677 /// ForeachDeclaration ::= ID '=' '[' ValueList ']'
1678 /// ForeachDeclaration ::= ID '=' '{' RangeList '}'
1679 /// ForeachDeclaration ::= ID '=' RangePiece
1681 VarInit *TGParser::ParseForeachDeclaration(ListInit *&ForeachListValue) {
1682 if (Lex.getCode() != tgtok::Id) {
1683 TokError("Expected identifier in foreach declaration");
1687 Init *DeclName = StringInit::get(Lex.getCurStrVal());
1690 // If a value is present, parse it.
1691 if (Lex.getCode() != tgtok::equal) {
1692 TokError("Expected '=' in foreach declaration");
1695 Lex.Lex(); // Eat the '='
1697 RecTy *IterType = 0;
1698 std::vector<unsigned> Ranges;
1700 switch (Lex.getCode()) {
1701 default: TokError("Unknown token when expecting a range list"); return 0;
1702 case tgtok::l_square: { // '[' ValueList ']'
1703 Init *List = ParseSimpleValue(0, 0, ParseForeachMode);
1704 ForeachListValue = dyn_cast<ListInit>(List);
1705 if (ForeachListValue == 0) {
1706 TokError("Expected a Value list");
1709 RecTy *ValueType = ForeachListValue->getType();
1710 ListRecTy *ListType = dyn_cast<ListRecTy>(ValueType);
1711 if (ListType == 0) {
1712 TokError("Value list is not of list type");
1715 IterType = ListType->getElementType();
1719 case tgtok::IntVal: { // RangePiece.
1720 if (ParseRangePiece(Ranges))
1725 case tgtok::l_brace: { // '{' RangeList '}'
1726 Lex.Lex(); // eat the '{'
1727 Ranges = ParseRangeList();
1728 if (Lex.getCode() != tgtok::r_brace) {
1729 TokError("expected '}' at end of bit range list");
1737 if (!Ranges.empty()) {
1738 assert(!IterType && "Type already initialized?");
1739 IterType = IntRecTy::get();
1740 std::vector<Init*> Values;
1741 for (unsigned i = 0, e = Ranges.size(); i != e; ++i)
1742 Values.push_back(IntInit::get(Ranges[i]));
1743 ForeachListValue = ListInit::get(Values, IterType);
1749 return VarInit::get(DeclName, IterType);
1752 /// ParseTemplateArgList - Read a template argument list, which is a non-empty
1753 /// sequence of template-declarations in <>'s. If CurRec is non-null, these are
1754 /// template args for a def, which may or may not be in a multiclass. If null,
1755 /// these are the template args for a multiclass.
1757 /// TemplateArgList ::= '<' Declaration (',' Declaration)* '>'
1759 bool TGParser::ParseTemplateArgList(Record *CurRec) {
1760 assert(Lex.getCode() == tgtok::less && "Not a template arg list!");
1761 Lex.Lex(); // eat the '<'
1763 Record *TheRecToAddTo = CurRec ? CurRec : &CurMultiClass->Rec;
1765 // Read the first declaration.
1766 Init *TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1770 TheRecToAddTo->addTemplateArg(TemplArg);
1772 while (Lex.getCode() == tgtok::comma) {
1773 Lex.Lex(); // eat the ','
1775 // Read the following declarations.
1776 TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1779 TheRecToAddTo->addTemplateArg(TemplArg);
1782 if (Lex.getCode() != tgtok::greater)
1783 return TokError("expected '>' at end of template argument list");
1784 Lex.Lex(); // eat the '>'.
1789 /// ParseBodyItem - Parse a single item at within the body of a def or class.
1791 /// BodyItem ::= Declaration ';'
1792 /// BodyItem ::= LET ID OptionalBitList '=' Value ';'
1793 bool TGParser::ParseBodyItem(Record *CurRec) {
1794 if (Lex.getCode() != tgtok::Let) {
1795 if (ParseDeclaration(CurRec, false) == 0)
1798 if (Lex.getCode() != tgtok::semi)
1799 return TokError("expected ';' after declaration");
1804 // LET ID OptionalRangeList '=' Value ';'
1805 if (Lex.Lex() != tgtok::Id)
1806 return TokError("expected field identifier after let");
1808 SMLoc IdLoc = Lex.getLoc();
1809 std::string FieldName = Lex.getCurStrVal();
1810 Lex.Lex(); // eat the field name.
1812 std::vector<unsigned> BitList;
1813 if (ParseOptionalBitList(BitList))
1815 std::reverse(BitList.begin(), BitList.end());
1817 if (Lex.getCode() != tgtok::equal)
1818 return TokError("expected '=' in let expression");
1819 Lex.Lex(); // eat the '='.
1821 RecordVal *Field = CurRec->getValue(FieldName);
1823 return TokError("Value '" + FieldName + "' unknown!");
1825 RecTy *Type = Field->getType();
1827 Init *Val = ParseValue(CurRec, Type);
1828 if (Val == 0) return true;
1830 if (Lex.getCode() != tgtok::semi)
1831 return TokError("expected ';' after let expression");
1834 return SetValue(CurRec, IdLoc, FieldName, BitList, Val);
1837 /// ParseBody - Read the body of a class or def. Return true on error, false on
1841 /// Body ::= '{' BodyList '}'
1842 /// BodyList BodyItem*
1844 bool TGParser::ParseBody(Record *CurRec) {
1845 // If this is a null definition, just eat the semi and return.
1846 if (Lex.getCode() == tgtok::semi) {
1851 if (Lex.getCode() != tgtok::l_brace)
1852 return TokError("Expected ';' or '{' to start body");
1856 while (Lex.getCode() != tgtok::r_brace)
1857 if (ParseBodyItem(CurRec))
1865 /// \brief Apply the current let bindings to \a CurRec.
1866 /// \returns true on error, false otherwise.
1867 bool TGParser::ApplyLetStack(Record *CurRec) {
1868 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1869 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1870 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1871 LetStack[i][j].Bits, LetStack[i][j].Value))
1876 /// ParseObjectBody - Parse the body of a def or class. This consists of an
1877 /// optional ClassList followed by a Body. CurRec is the current def or class
1878 /// that is being parsed.
1880 /// ObjectBody ::= BaseClassList Body
1881 /// BaseClassList ::= /*empty*/
1882 /// BaseClassList ::= ':' BaseClassListNE
1883 /// BaseClassListNE ::= SubClassRef (',' SubClassRef)*
1885 bool TGParser::ParseObjectBody(Record *CurRec) {
1886 // If there is a baseclass list, read it.
1887 if (Lex.getCode() == tgtok::colon) {
1890 // Read all of the subclasses.
1891 SubClassReference SubClass = ParseSubClassReference(CurRec, false);
1894 if (SubClass.Rec == 0) return true;
1897 if (AddSubClass(CurRec, SubClass))
1900 if (Lex.getCode() != tgtok::comma) break;
1901 Lex.Lex(); // eat ','.
1902 SubClass = ParseSubClassReference(CurRec, false);
1906 if (ApplyLetStack(CurRec))
1909 return ParseBody(CurRec);
1912 /// ParseDef - Parse and return a top level or multiclass def, return the record
1913 /// corresponding to it. This returns null on error.
1915 /// DefInst ::= DEF ObjectName ObjectBody
1917 bool TGParser::ParseDef(MultiClass *CurMultiClass) {
1918 SMLoc DefLoc = Lex.getLoc();
1919 assert(Lex.getCode() == tgtok::Def && "Unknown tok");
1920 Lex.Lex(); // Eat the 'def' token.
1922 // Parse ObjectName and make a record for it.
1924 Init *Name = ParseObjectName(CurMultiClass);
1926 CurRec = new Record(Name, DefLoc, Records);
1928 CurRec = new Record(GetNewAnonymousName(), DefLoc, Records,
1929 /*IsAnonymous=*/true);
1931 if (!CurMultiClass && Loops.empty()) {
1932 // Top-level def definition.
1934 // Ensure redefinition doesn't happen.
1935 if (Records.getDef(CurRec->getNameInitAsString())) {
1936 Error(DefLoc, "def '" + CurRec->getNameInitAsString()
1937 + "' already defined");
1940 Records.addDef(CurRec);
1941 } else if (CurMultiClass) {
1942 // Otherwise, a def inside a multiclass, add it to the multiclass.
1943 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
1944 if (CurMultiClass->DefPrototypes[i]->getNameInit()
1945 == CurRec->getNameInit()) {
1946 Error(DefLoc, "def '" + CurRec->getNameInitAsString() +
1947 "' already defined in this multiclass!");
1950 CurMultiClass->DefPrototypes.push_back(CurRec);
1953 if (ParseObjectBody(CurRec))
1956 if (CurMultiClass == 0) // Def's in multiclasses aren't really defs.
1957 // See Record::setName(). This resolve step will see any new name
1958 // for the def that might have been created when resolving
1959 // inheritance, values and arguments above.
1960 CurRec->resolveReferences();
1962 // If ObjectBody has template arguments, it's an error.
1963 assert(CurRec->getTemplateArgs().empty() && "How'd this get template args?");
1965 if (CurMultiClass) {
1966 // Copy the template arguments for the multiclass into the def.
1967 const std::vector<Init *> &TArgs =
1968 CurMultiClass->Rec.getTemplateArgs();
1970 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1971 const RecordVal *RV = CurMultiClass->Rec.getValue(TArgs[i]);
1972 assert(RV && "Template arg doesn't exist?");
1973 CurRec->addValue(*RV);
1977 if (ProcessForeachDefs(CurRec, DefLoc)) {
1979 "Could not process loops for def" + CurRec->getNameInitAsString());
1986 /// ParseForeach - Parse a for statement. Return the record corresponding
1987 /// to it. This returns true on error.
1989 /// Foreach ::= FOREACH Declaration IN '{ ObjectList '}'
1990 /// Foreach ::= FOREACH Declaration IN Object
1992 bool TGParser::ParseForeach(MultiClass *CurMultiClass) {
1993 assert(Lex.getCode() == tgtok::Foreach && "Unknown tok");
1994 Lex.Lex(); // Eat the 'for' token.
1996 // Make a temporary object to record items associated with the for
1998 ListInit *ListValue = 0;
1999 VarInit *IterName = ParseForeachDeclaration(ListValue);
2001 return TokError("expected declaration in for");
2003 if (Lex.getCode() != tgtok::In)
2004 return TokError("Unknown tok");
2005 Lex.Lex(); // Eat the in
2007 // Create a loop object and remember it.
2008 Loops.push_back(ForeachLoop(IterName, ListValue));
2010 if (Lex.getCode() != tgtok::l_brace) {
2011 // FOREACH Declaration IN Object
2012 if (ParseObject(CurMultiClass))
2016 SMLoc BraceLoc = Lex.getLoc();
2017 // Otherwise, this is a group foreach.
2018 Lex.Lex(); // eat the '{'.
2020 // Parse the object list.
2021 if (ParseObjectList(CurMultiClass))
2024 if (Lex.getCode() != tgtok::r_brace) {
2025 TokError("expected '}' at end of foreach command");
2026 return Error(BraceLoc, "to match this '{'");
2028 Lex.Lex(); // Eat the }
2031 // We've processed everything in this loop.
2037 /// ParseClass - Parse a tblgen class definition.
2039 /// ClassInst ::= CLASS ID TemplateArgList? ObjectBody
2041 bool TGParser::ParseClass() {
2042 assert(Lex.getCode() == tgtok::Class && "Unexpected token!");
2045 if (Lex.getCode() != tgtok::Id)
2046 return TokError("expected class name after 'class' keyword");
2048 Record *CurRec = Records.getClass(Lex.getCurStrVal());
2050 // If the body was previously defined, this is an error.
2051 if (CurRec->getValues().size() > 1 || // Account for NAME.
2052 !CurRec->getSuperClasses().empty() ||
2053 !CurRec->getTemplateArgs().empty())
2054 return TokError("Class '" + CurRec->getNameInitAsString()
2055 + "' already defined");
2057 // If this is the first reference to this class, create and add it.
2058 CurRec = new Record(Lex.getCurStrVal(), Lex.getLoc(), Records);
2059 Records.addClass(CurRec);
2061 Lex.Lex(); // eat the name.
2063 // If there are template args, parse them.
2064 if (Lex.getCode() == tgtok::less)
2065 if (ParseTemplateArgList(CurRec))
2068 // Finally, parse the object body.
2069 return ParseObjectBody(CurRec);
2072 /// ParseLetList - Parse a non-empty list of assignment expressions into a list
2075 /// LetList ::= LetItem (',' LetItem)*
2076 /// LetItem ::= ID OptionalRangeList '=' Value
2078 std::vector<LetRecord> TGParser::ParseLetList() {
2079 std::vector<LetRecord> Result;
2082 if (Lex.getCode() != tgtok::Id) {
2083 TokError("expected identifier in let definition");
2084 return std::vector<LetRecord>();
2086 std::string Name = Lex.getCurStrVal();
2087 SMLoc NameLoc = Lex.getLoc();
2088 Lex.Lex(); // Eat the identifier.
2090 // Check for an optional RangeList.
2091 std::vector<unsigned> Bits;
2092 if (ParseOptionalRangeList(Bits))
2093 return std::vector<LetRecord>();
2094 std::reverse(Bits.begin(), Bits.end());
2096 if (Lex.getCode() != tgtok::equal) {
2097 TokError("expected '=' in let expression");
2098 return std::vector<LetRecord>();
2100 Lex.Lex(); // eat the '='.
2102 Init *Val = ParseValue(0);
2103 if (Val == 0) return std::vector<LetRecord>();
2105 // Now that we have everything, add the record.
2106 Result.push_back(LetRecord(Name, Bits, Val, NameLoc));
2108 if (Lex.getCode() != tgtok::comma)
2110 Lex.Lex(); // eat the comma.
2114 /// ParseTopLevelLet - Parse a 'let' at top level. This can be a couple of
2115 /// different related productions. This works inside multiclasses too.
2117 /// Object ::= LET LetList IN '{' ObjectList '}'
2118 /// Object ::= LET LetList IN Object
2120 bool TGParser::ParseTopLevelLet(MultiClass *CurMultiClass) {
2121 assert(Lex.getCode() == tgtok::Let && "Unexpected token");
2124 // Add this entry to the let stack.
2125 std::vector<LetRecord> LetInfo = ParseLetList();
2126 if (LetInfo.empty()) return true;
2127 LetStack.push_back(LetInfo);
2129 if (Lex.getCode() != tgtok::In)
2130 return TokError("expected 'in' at end of top-level 'let'");
2133 // If this is a scalar let, just handle it now
2134 if (Lex.getCode() != tgtok::l_brace) {
2135 // LET LetList IN Object
2136 if (ParseObject(CurMultiClass))
2138 } else { // Object ::= LETCommand '{' ObjectList '}'
2139 SMLoc BraceLoc = Lex.getLoc();
2140 // Otherwise, this is a group let.
2141 Lex.Lex(); // eat the '{'.
2143 // Parse the object list.
2144 if (ParseObjectList(CurMultiClass))
2147 if (Lex.getCode() != tgtok::r_brace) {
2148 TokError("expected '}' at end of top level let command");
2149 return Error(BraceLoc, "to match this '{'");
2154 // Outside this let scope, this let block is not active.
2155 LetStack.pop_back();
2159 /// ParseMultiClass - Parse a multiclass definition.
2161 /// MultiClassInst ::= MULTICLASS ID TemplateArgList?
2162 /// ':' BaseMultiClassList '{' MultiClassObject+ '}'
2163 /// MultiClassObject ::= DefInst
2164 /// MultiClassObject ::= MultiClassInst
2165 /// MultiClassObject ::= DefMInst
2166 /// MultiClassObject ::= LETCommand '{' ObjectList '}'
2167 /// MultiClassObject ::= LETCommand Object
2169 bool TGParser::ParseMultiClass() {
2170 assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");
2171 Lex.Lex(); // Eat the multiclass token.
2173 if (Lex.getCode() != tgtok::Id)
2174 return TokError("expected identifier after multiclass for name");
2175 std::string Name = Lex.getCurStrVal();
2177 if (MultiClasses.count(Name))
2178 return TokError("multiclass '" + Name + "' already defined");
2180 CurMultiClass = MultiClasses[Name] = new MultiClass(Name,
2181 Lex.getLoc(), Records);
2182 Lex.Lex(); // Eat the identifier.
2184 // If there are template args, parse them.
2185 if (Lex.getCode() == tgtok::less)
2186 if (ParseTemplateArgList(0))
2189 bool inherits = false;
2191 // If there are submulticlasses, parse them.
2192 if (Lex.getCode() == tgtok::colon) {
2197 // Read all of the submulticlasses.
2198 SubMultiClassReference SubMultiClass =
2199 ParseSubMultiClassReference(CurMultiClass);
2202 if (SubMultiClass.MC == 0) return true;
2205 if (AddSubMultiClass(CurMultiClass, SubMultiClass))
2208 if (Lex.getCode() != tgtok::comma) break;
2209 Lex.Lex(); // eat ','.
2210 SubMultiClass = ParseSubMultiClassReference(CurMultiClass);
2214 if (Lex.getCode() != tgtok::l_brace) {
2216 return TokError("expected '{' in multiclass definition");
2217 else if (Lex.getCode() != tgtok::semi)
2218 return TokError("expected ';' in multiclass definition");
2220 Lex.Lex(); // eat the ';'.
2222 if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
2223 return TokError("multiclass must contain at least one def");
2225 while (Lex.getCode() != tgtok::r_brace) {
2226 switch (Lex.getCode()) {
2228 return TokError("expected 'let', 'def' or 'defm' in multiclass body");
2232 case tgtok::Foreach:
2233 if (ParseObject(CurMultiClass))
2238 Lex.Lex(); // eat the '}'.
2246 InstantiateMulticlassDef(MultiClass &MC,
2249 SMLoc DefmPrefixLoc) {
2250 // We need to preserve DefProto so it can be reused for later
2251 // instantiations, so create a new Record to inherit from it.
2253 // Add in the defm name. If the defm prefix is empty, give each
2254 // instantiated def a unique name. Otherwise, if "#NAME#" exists in the
2255 // name, substitute the prefix for #NAME#. Otherwise, use the defm name
2258 bool IsAnonymous = false;
2259 if (DefmPrefix == 0) {
2260 DefmPrefix = StringInit::get(GetNewAnonymousName());
2264 Init *DefName = DefProto->getNameInit();
2266 StringInit *DefNameString = dyn_cast<StringInit>(DefName);
2268 if (DefNameString != 0) {
2269 // We have a fully expanded string so there are no operators to
2270 // resolve. We should concatenate the given prefix and name.
2272 BinOpInit::get(BinOpInit::STRCONCAT,
2273 UnOpInit::get(UnOpInit::CAST, DefmPrefix,
2274 StringRecTy::get())->Fold(DefProto, &MC),
2275 DefName, StringRecTy::get())->Fold(DefProto, &MC);
2278 // Make a trail of SMLocs from the multiclass instantiations.
2279 SmallVector<SMLoc, 4> Locs(1, DefmPrefixLoc);
2280 Locs.append(DefProto->getLoc().begin(), DefProto->getLoc().end());
2281 Record *CurRec = new Record(DefName, Locs, Records, IsAnonymous);
2283 SubClassReference Ref;
2284 Ref.RefLoc = DefmPrefixLoc;
2286 AddSubClass(CurRec, Ref);
2288 // Set the value for NAME. We don't resolve references to it 'til later,
2289 // though, so that uses in nested multiclass names don't get
2291 if (SetValue(CurRec, Ref.RefLoc, "NAME", std::vector<unsigned>(),
2293 Error(DefmPrefixLoc, "Could not resolve "
2294 + CurRec->getNameInitAsString() + ":NAME to '"
2295 + DefmPrefix->getAsUnquotedString() + "'");
2299 // If the DefNameString didn't resolve, we probably have a reference to
2300 // NAME and need to replace it. We need to do at least this much greedily,
2301 // otherwise nested multiclasses will end up with incorrect NAME expansions.
2302 if (DefNameString == 0) {
2303 RecordVal *DefNameRV = CurRec->getValue("NAME");
2304 CurRec->resolveReferencesTo(DefNameRV);
2307 if (!CurMultiClass) {
2308 // Now that we're at the top level, resolve all NAME references
2309 // in the resultant defs that weren't in the def names themselves.
2310 RecordVal *DefNameRV = CurRec->getValue("NAME");
2311 CurRec->resolveReferencesTo(DefNameRV);
2313 // Now that NAME references are resolved and we're at the top level of
2314 // any multiclass expansions, add the record to the RecordKeeper. If we are
2315 // currently in a multiclass, it means this defm appears inside a
2316 // multiclass and its name won't be fully resolvable until we see
2317 // the top-level defm. Therefore, we don't add this to the
2318 // RecordKeeper at this point. If we did we could get duplicate
2319 // defs as more than one probably refers to NAME or some other
2320 // common internal placeholder.
2322 // Ensure redefinition doesn't happen.
2323 if (Records.getDef(CurRec->getNameInitAsString())) {
2324 Error(DefmPrefixLoc, "def '" + CurRec->getNameInitAsString() +
2325 "' already defined, instantiating defm with subdef '" +
2326 DefProto->getNameInitAsString() + "'");
2330 Records.addDef(CurRec);
2336 bool TGParser::ResolveMulticlassDefArgs(MultiClass &MC,
2338 SMLoc DefmPrefixLoc,
2340 const std::vector<Init *> &TArgs,
2341 std::vector<Init *> &TemplateVals,
2343 // Loop over all of the template arguments, setting them to the specified
2344 // value or leaving them as the default if necessary.
2345 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
2346 // Check if a value is specified for this temp-arg.
2347 if (i < TemplateVals.size()) {
2349 if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], std::vector<unsigned>(),
2354 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
2358 CurRec->removeValue(TArgs[i]);
2360 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
2361 return Error(SubClassLoc, "value not specified for template argument #"+
2362 utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
2363 + ") of multiclassclass '" + MC.Rec.getNameInitAsString()
2370 bool TGParser::ResolveMulticlassDef(MultiClass &MC,
2373 SMLoc DefmPrefixLoc) {
2374 // If the mdef is inside a 'let' expression, add to each def.
2375 if (ApplyLetStack(CurRec))
2376 return Error(DefmPrefixLoc, "when instantiating this defm");
2378 // Don't create a top level definition for defm inside multiclasses,
2379 // instead, only update the prototypes and bind the template args
2380 // with the new created definition.
2383 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size();
2385 if (CurMultiClass->DefPrototypes[i]->getNameInit()
2386 == CurRec->getNameInit())
2387 return Error(DefmPrefixLoc, "defm '" + CurRec->getNameInitAsString() +
2388 "' already defined in this multiclass!");
2389 CurMultiClass->DefPrototypes.push_back(CurRec);
2391 // Copy the template arguments for the multiclass into the new def.
2392 const std::vector<Init *> &TA =
2393 CurMultiClass->Rec.getTemplateArgs();
2395 for (unsigned i = 0, e = TA.size(); i != e; ++i) {
2396 const RecordVal *RV = CurMultiClass->Rec.getValue(TA[i]);
2397 assert(RV && "Template arg doesn't exist?");
2398 CurRec->addValue(*RV);
2404 /// ParseDefm - Parse the instantiation of a multiclass.
2406 /// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
2408 bool TGParser::ParseDefm(MultiClass *CurMultiClass) {
2409 assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
2411 Init *DefmPrefix = 0;
2413 if (Lex.Lex() == tgtok::Id) { // eat the defm.
2414 DefmPrefix = ParseObjectName(CurMultiClass);
2417 SMLoc DefmPrefixLoc = Lex.getLoc();
2418 if (Lex.getCode() != tgtok::colon)
2419 return TokError("expected ':' after defm identifier");
2421 // Keep track of the new generated record definitions.
2422 std::vector<Record*> NewRecDefs;
2424 // This record also inherits from a regular class (non-multiclass)?
2425 bool InheritFromClass = false;
2430 SMLoc SubClassLoc = Lex.getLoc();
2431 SubClassReference Ref = ParseSubClassReference(0, true);
2434 if (Ref.Rec == 0) return true;
2436 // To instantiate a multiclass, we need to first get the multiclass, then
2437 // instantiate each def contained in the multiclass with the SubClassRef
2438 // template parameters.
2439 MultiClass *MC = MultiClasses[Ref.Rec->getName()];
2440 assert(MC && "Didn't lookup multiclass correctly?");
2441 std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
2443 // Verify that the correct number of template arguments were specified.
2444 const std::vector<Init *> &TArgs = MC->Rec.getTemplateArgs();
2445 if (TArgs.size() < TemplateVals.size())
2446 return Error(SubClassLoc,
2447 "more template args specified than multiclass expects");
2449 // Loop over all the def's in the multiclass, instantiating each one.
2450 for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
2451 Record *DefProto = MC->DefPrototypes[i];
2453 Record *CurRec = InstantiateMulticlassDef(*MC, DefProto, DefmPrefix, DefmPrefixLoc);
2457 if (ResolveMulticlassDefArgs(*MC, CurRec, DefmPrefixLoc, SubClassLoc,
2458 TArgs, TemplateVals, true/*Delete args*/))
2459 return Error(SubClassLoc, "could not instantiate def");
2461 if (ResolveMulticlassDef(*MC, CurRec, DefProto, DefmPrefixLoc))
2462 return Error(SubClassLoc, "could not instantiate def");
2464 NewRecDefs.push_back(CurRec);
2468 if (Lex.getCode() != tgtok::comma) break;
2469 Lex.Lex(); // eat ','.
2471 SubClassLoc = Lex.getLoc();
2473 // A defm can inherit from regular classes (non-multiclass) as
2474 // long as they come in the end of the inheritance list.
2475 InheritFromClass = (Records.getClass(Lex.getCurStrVal()) != 0);
2477 if (InheritFromClass)
2480 Ref = ParseSubClassReference(0, true);
2483 if (InheritFromClass) {
2484 // Process all the classes to inherit as if they were part of a
2485 // regular 'def' and inherit all record values.
2486 SubClassReference SubClass = ParseSubClassReference(0, false);
2489 if (SubClass.Rec == 0) return true;
2491 // Get the expanded definition prototypes and teach them about
2492 // the record values the current class to inherit has
2493 for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i) {
2494 Record *CurRec = NewRecDefs[i];
2497 if (AddSubClass(CurRec, SubClass))
2500 if (ApplyLetStack(CurRec))
2504 if (Lex.getCode() != tgtok::comma) break;
2505 Lex.Lex(); // eat ','.
2506 SubClass = ParseSubClassReference(0, false);
2511 for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i)
2512 // See Record::setName(). This resolve step will see any new
2513 // name for the def that might have been created when resolving
2514 // inheritance, values and arguments above.
2515 NewRecDefs[i]->resolveReferences();
2517 if (Lex.getCode() != tgtok::semi)
2518 return TokError("expected ';' at end of defm");
2525 /// Object ::= ClassInst
2526 /// Object ::= DefInst
2527 /// Object ::= MultiClassInst
2528 /// Object ::= DefMInst
2529 /// Object ::= LETCommand '{' ObjectList '}'
2530 /// Object ::= LETCommand Object
2531 bool TGParser::ParseObject(MultiClass *MC) {
2532 switch (Lex.getCode()) {
2534 return TokError("Expected class, def, defm, multiclass or let definition");
2535 case tgtok::Let: return ParseTopLevelLet(MC);
2536 case tgtok::Def: return ParseDef(MC);
2537 case tgtok::Foreach: return ParseForeach(MC);
2538 case tgtok::Defm: return ParseDefm(MC);
2539 case tgtok::Class: return ParseClass();
2540 case tgtok::MultiClass: return ParseMultiClass();
2545 /// ObjectList :== Object*
2546 bool TGParser::ParseObjectList(MultiClass *MC) {
2547 while (isObjectStart(Lex.getCode())) {
2548 if (ParseObject(MC))
2554 bool TGParser::ParseFile() {
2555 Lex.Lex(); // Prime the lexer.
2556 if (ParseObjectList()) return true;
2558 // If we have unread input at the end of the file, report it.
2559 if (Lex.getCode() == tgtok::Eof)
2562 return TokError("Unexpected input at top level");