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(nullptr) {}
34 bool isInvalid() const { return Rec == nullptr; }
37 struct SubMultiClassReference {
40 std::vector<Init*> TemplateArgs;
41 SubMultiClassReference() : MC(nullptr) {}
43 bool isInvalid() const { return MC == nullptr; }
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) 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);
118 assert(BInit != nullptr);
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);
138 if (RV->setValue(V)) {
139 std::string InitType = "";
140 if (BitsInit *BI = dyn_cast<BitsInit>(V)) {
141 InitType = (Twine("' of type bit initializer with length ") +
142 Twine(BI->getNumBits())).str();
144 return Error(Loc, "Value '" + ValName->getAsUnquotedString() + "' of type '"
145 + RV->getType()->getAsString() +
146 "' is incompatible with initializer '" + V->getAsString()
153 /// AddSubClass - Add SubClass as a subclass to CurRec, resolving its template
154 /// args as SubClass's template arguments.
155 bool TGParser::AddSubClass(Record *CurRec, SubClassReference &SubClass) {
156 Record *SC = SubClass.Rec;
157 // Add all of the values in the subclass into the current class.
158 const std::vector<RecordVal> &Vals = SC->getValues();
159 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
160 if (AddValue(CurRec, SubClass.RefRange.Start, Vals[i]))
163 const std::vector<Init *> &TArgs = SC->getTemplateArgs();
165 // Ensure that an appropriate number of template arguments are specified.
166 if (TArgs.size() < SubClass.TemplateArgs.size())
167 return Error(SubClass.RefRange.Start,
168 "More template args specified than expected");
170 // Loop over all of the template arguments, setting them to the specified
171 // value or leaving them as the default if necessary.
172 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
173 if (i < SubClass.TemplateArgs.size()) {
174 // If a value is specified for this template arg, set it now.
175 if (SetValue(CurRec, SubClass.RefRange.Start, TArgs[i],
176 std::vector<unsigned>(), SubClass.TemplateArgs[i]))
180 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
183 CurRec->removeValue(TArgs[i]);
185 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
186 return Error(SubClass.RefRange.Start,
187 "Value not specified for template argument #"
188 + utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
189 + ") of subclass '" + SC->getNameInitAsString() + "'!");
193 // Since everything went well, we can now set the "superclass" list for the
195 const std::vector<Record*> &SCs = SC->getSuperClasses();
196 ArrayRef<SMRange> SCRanges = SC->getSuperClassRanges();
197 for (unsigned i = 0, e = SCs.size(); i != e; ++i) {
198 if (CurRec->isSubClassOf(SCs[i]))
199 return Error(SubClass.RefRange.Start,
200 "Already subclass of '" + SCs[i]->getName() + "'!\n");
201 CurRec->addSuperClass(SCs[i], SCRanges[i]);
204 if (CurRec->isSubClassOf(SC))
205 return Error(SubClass.RefRange.Start,
206 "Already subclass of '" + SC->getName() + "'!\n");
207 CurRec->addSuperClass(SC, SubClass.RefRange);
211 /// AddSubMultiClass - Add SubMultiClass as a subclass to
212 /// CurMC, resolving its template args as SubMultiClass's
213 /// template arguments.
214 bool TGParser::AddSubMultiClass(MultiClass *CurMC,
215 SubMultiClassReference &SubMultiClass) {
216 MultiClass *SMC = SubMultiClass.MC;
217 Record *CurRec = &CurMC->Rec;
219 const std::vector<RecordVal> &MCVals = CurRec->getValues();
221 // Add all of the values in the subclass into the current class.
222 const std::vector<RecordVal> &SMCVals = SMC->Rec.getValues();
223 for (unsigned i = 0, e = SMCVals.size(); i != e; ++i)
224 if (AddValue(CurRec, SubMultiClass.RefRange.Start, SMCVals[i]))
227 int newDefStart = CurMC->DefPrototypes.size();
229 // Add all of the defs in the subclass into the current multiclass.
230 for (MultiClass::RecordVector::const_iterator i = SMC->DefPrototypes.begin(),
231 iend = SMC->DefPrototypes.end();
234 // Clone the def and add it to the current multiclass
235 Record *NewDef = new Record(**i);
237 // Add all of the values in the superclass into the current def.
238 for (unsigned i = 0, e = MCVals.size(); i != e; ++i)
239 if (AddValue(NewDef, SubMultiClass.RefRange.Start, MCVals[i])) {
244 CurMC->DefPrototypes.push_back(NewDef);
247 const std::vector<Init *> &SMCTArgs = SMC->Rec.getTemplateArgs();
249 // Ensure that an appropriate number of template arguments are
251 if (SMCTArgs.size() < SubMultiClass.TemplateArgs.size())
252 return Error(SubMultiClass.RefRange.Start,
253 "More template args specified than expected");
255 // Loop over all of the template arguments, setting them to the specified
256 // value or leaving them as the default if necessary.
257 for (unsigned i = 0, e = SMCTArgs.size(); i != e; ++i) {
258 if (i < SubMultiClass.TemplateArgs.size()) {
259 // If a value is specified for this template arg, set it in the
261 if (SetValue(CurRec, SubMultiClass.RefRange.Start, SMCTArgs[i],
262 std::vector<unsigned>(),
263 SubMultiClass.TemplateArgs[i]))
267 CurRec->resolveReferencesTo(CurRec->getValue(SMCTArgs[i]));
270 CurRec->removeValue(SMCTArgs[i]);
272 // If a value is specified for this template arg, set it in the
274 for (MultiClass::RecordVector::iterator j =
275 CurMC->DefPrototypes.begin() + newDefStart,
276 jend = CurMC->DefPrototypes.end();
281 if (SetValue(Def, SubMultiClass.RefRange.Start, SMCTArgs[i],
282 std::vector<unsigned>(),
283 SubMultiClass.TemplateArgs[i]))
287 Def->resolveReferencesTo(Def->getValue(SMCTArgs[i]));
290 Def->removeValue(SMCTArgs[i]);
292 } else if (!CurRec->getValue(SMCTArgs[i])->getValue()->isComplete()) {
293 return Error(SubMultiClass.RefRange.Start,
294 "Value not specified for template argument #"
295 + utostr(i) + " (" + SMCTArgs[i]->getAsUnquotedString()
296 + ") of subclass '" + SMC->Rec.getNameInitAsString() + "'!");
303 /// ProcessForeachDefs - Given a record, apply all of the variable
304 /// values in all surrounding foreach loops, creating new records for
305 /// each combination of values.
306 bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc) {
310 // We want to instantiate a new copy of CurRec for each combination
311 // of nested loop iterator values. We don't want top instantiate
312 // any copies until we have values for each loop iterator.
314 return ProcessForeachDefs(CurRec, Loc, IterVals);
317 /// ProcessForeachDefs - Given a record, a loop and a loop iterator,
318 /// apply each of the variable values in this loop and then process
320 bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals){
321 // Recursively build a tuple of iterator values.
322 if (IterVals.size() != Loops.size()) {
323 assert(IterVals.size() < Loops.size());
324 ForeachLoop &CurLoop = Loops[IterVals.size()];
325 ListInit *List = dyn_cast<ListInit>(CurLoop.ListValue);
327 Error(Loc, "Loop list is not a list");
331 // Process each value.
332 for (int64_t i = 0; i < List->getSize(); ++i) {
333 Init *ItemVal = List->resolveListElementReference(*CurRec, nullptr, i);
334 IterVals.push_back(IterRecord(CurLoop.IterVar, ItemVal));
335 if (ProcessForeachDefs(CurRec, Loc, IterVals))
342 // This is the bottom of the recursion. We have all of the iterator values
343 // for this point in the iteration space. Instantiate a new record to
344 // reflect this combination of values.
345 Record *IterRec = new Record(*CurRec);
347 // Set the iterator values now.
348 for (unsigned i = 0, e = IterVals.size(); i != e; ++i) {
349 VarInit *IterVar = IterVals[i].IterVar;
350 TypedInit *IVal = dyn_cast<TypedInit>(IterVals[i].IterValue);
352 Error(Loc, "foreach iterator value is untyped");
357 IterRec->addValue(RecordVal(IterVar->getName(), IVal->getType(), false));
359 if (SetValue(IterRec, Loc, IterVar->getName(),
360 std::vector<unsigned>(), IVal)) {
361 Error(Loc, "when instantiating this def");
367 IterRec->resolveReferencesTo(IterRec->getValue(IterVar->getName()));
370 IterRec->removeValue(IterVar->getName());
373 if (Records.getDef(IterRec->getNameInitAsString())) {
374 // If this record is anonymous, it's no problem, just generate a new name
375 if (IterRec->isAnonymous())
376 IterRec->setName(GetNewAnonymousName());
378 Error(Loc, "def already exists: " + IterRec->getNameInitAsString());
384 Records.addDef(IterRec);
385 IterRec->resolveReferences();
389 //===----------------------------------------------------------------------===//
391 //===----------------------------------------------------------------------===//
393 /// isObjectStart - Return true if this is a valid first token for an Object.
394 static bool isObjectStart(tgtok::TokKind K) {
395 return K == tgtok::Class || K == tgtok::Def ||
396 K == tgtok::Defm || K == tgtok::Let ||
397 K == tgtok::MultiClass || K == tgtok::Foreach;
400 /// GetNewAnonymousName - Generate a unique anonymous name that can be used as
402 std::string TGParser::GetNewAnonymousName() {
403 unsigned Tmp = AnonCounter++; // MSVC2012 ICEs without this.
404 return "anonymous_" + utostr(Tmp);
407 /// ParseObjectName - If an object name is specified, return it. Otherwise,
409 /// ObjectName ::= Value [ '#' Value ]*
410 /// ObjectName ::= /*empty*/
412 Init *TGParser::ParseObjectName(MultiClass *CurMultiClass) {
413 switch (Lex.getCode()) {
417 // These are all of the tokens that can begin an object body.
418 // Some of these can also begin values but we disallow those cases
419 // because they are unlikely to be useful.
425 Record *CurRec = nullptr;
427 CurRec = &CurMultiClass->Rec;
429 RecTy *Type = nullptr;
431 const TypedInit *CurRecName = dyn_cast<TypedInit>(CurRec->getNameInit());
433 TokError("Record name is not typed!");
436 Type = CurRecName->getType();
439 return ParseValue(CurRec, Type, ParseNameMode);
442 /// ParseClassID - Parse and resolve a reference to a class name. This returns
447 Record *TGParser::ParseClassID() {
448 if (Lex.getCode() != tgtok::Id) {
449 TokError("expected name for ClassID");
453 Record *Result = Records.getClass(Lex.getCurStrVal());
455 TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
461 /// ParseMultiClassID - Parse and resolve a reference to a multiclass name.
462 /// This returns null on error.
464 /// MultiClassID ::= ID
466 MultiClass *TGParser::ParseMultiClassID() {
467 if (Lex.getCode() != tgtok::Id) {
468 TokError("expected name for MultiClassID");
472 MultiClass *Result = MultiClasses[Lex.getCurStrVal()];
474 TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
480 /// ParseSubClassReference - Parse a reference to a subclass or to a templated
481 /// subclass. This returns a SubClassRefTy with a null Record* on error.
483 /// SubClassRef ::= ClassID
484 /// SubClassRef ::= ClassID '<' ValueList '>'
486 SubClassReference TGParser::
487 ParseSubClassReference(Record *CurRec, bool isDefm) {
488 SubClassReference Result;
489 Result.RefRange.Start = Lex.getLoc();
492 if (MultiClass *MC = ParseMultiClassID())
493 Result.Rec = &MC->Rec;
495 Result.Rec = ParseClassID();
497 if (!Result.Rec) return Result;
499 // If there is no template arg list, we're done.
500 if (Lex.getCode() != tgtok::less) {
501 Result.RefRange.End = Lex.getLoc();
504 Lex.Lex(); // Eat the '<'
506 if (Lex.getCode() == tgtok::greater) {
507 TokError("subclass reference requires a non-empty list of template values");
508 Result.Rec = nullptr;
512 Result.TemplateArgs = ParseValueList(CurRec, Result.Rec);
513 if (Result.TemplateArgs.empty()) {
514 Result.Rec = nullptr; // Error parsing value list.
518 if (Lex.getCode() != tgtok::greater) {
519 TokError("expected '>' in template value list");
520 Result.Rec = nullptr;
524 Result.RefRange.End = Lex.getLoc();
529 /// ParseSubMultiClassReference - Parse a reference to a subclass or to a
530 /// templated submulticlass. This returns a SubMultiClassRefTy with a null
531 /// Record* on error.
533 /// SubMultiClassRef ::= MultiClassID
534 /// SubMultiClassRef ::= MultiClassID '<' ValueList '>'
536 SubMultiClassReference TGParser::
537 ParseSubMultiClassReference(MultiClass *CurMC) {
538 SubMultiClassReference Result;
539 Result.RefRange.Start = Lex.getLoc();
541 Result.MC = ParseMultiClassID();
542 if (!Result.MC) return Result;
544 // If there is no template arg list, we're done.
545 if (Lex.getCode() != tgtok::less) {
546 Result.RefRange.End = Lex.getLoc();
549 Lex.Lex(); // Eat the '<'
551 if (Lex.getCode() == tgtok::greater) {
552 TokError("subclass reference requires a non-empty list of template values");
557 Result.TemplateArgs = ParseValueList(&CurMC->Rec, &Result.MC->Rec);
558 if (Result.TemplateArgs.empty()) {
559 Result.MC = nullptr; // Error parsing value list.
563 if (Lex.getCode() != tgtok::greater) {
564 TokError("expected '>' in template value list");
569 Result.RefRange.End = Lex.getLoc();
574 /// ParseRangePiece - Parse a bit/value range.
575 /// RangePiece ::= INTVAL
576 /// RangePiece ::= INTVAL '-' INTVAL
577 /// RangePiece ::= INTVAL INTVAL
578 bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
579 if (Lex.getCode() != tgtok::IntVal) {
580 TokError("expected integer or bitrange");
583 int64_t Start = Lex.getCurIntVal();
587 return TokError("invalid range, cannot be negative");
589 switch (Lex.Lex()) { // eat first character.
591 Ranges.push_back(Start);
594 if (Lex.Lex() != tgtok::IntVal) {
595 TokError("expected integer value as end of range");
598 End = Lex.getCurIntVal();
601 End = -Lex.getCurIntVal();
605 return TokError("invalid range, cannot be negative");
610 for (; Start <= End; ++Start)
611 Ranges.push_back(Start);
613 for (; Start >= End; --Start)
614 Ranges.push_back(Start);
619 /// ParseRangeList - Parse a list of scalars and ranges into scalar values.
621 /// RangeList ::= RangePiece (',' RangePiece)*
623 std::vector<unsigned> TGParser::ParseRangeList() {
624 std::vector<unsigned> Result;
626 // Parse the first piece.
627 if (ParseRangePiece(Result))
628 return std::vector<unsigned>();
629 while (Lex.getCode() == tgtok::comma) {
630 Lex.Lex(); // Eat the comma.
632 // Parse the next range piece.
633 if (ParseRangePiece(Result))
634 return std::vector<unsigned>();
639 /// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
640 /// OptionalRangeList ::= '<' RangeList '>'
641 /// OptionalRangeList ::= /*empty*/
642 bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
643 if (Lex.getCode() != tgtok::less)
646 SMLoc StartLoc = Lex.getLoc();
647 Lex.Lex(); // eat the '<'
649 // Parse the range list.
650 Ranges = ParseRangeList();
651 if (Ranges.empty()) return true;
653 if (Lex.getCode() != tgtok::greater) {
654 TokError("expected '>' at end of range list");
655 return Error(StartLoc, "to match this '<'");
657 Lex.Lex(); // eat the '>'.
661 /// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
662 /// OptionalBitList ::= '{' RangeList '}'
663 /// OptionalBitList ::= /*empty*/
664 bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
665 if (Lex.getCode() != tgtok::l_brace)
668 SMLoc StartLoc = Lex.getLoc();
669 Lex.Lex(); // eat the '{'
671 // Parse the range list.
672 Ranges = ParseRangeList();
673 if (Ranges.empty()) return true;
675 if (Lex.getCode() != tgtok::r_brace) {
676 TokError("expected '}' at end of bit list");
677 return Error(StartLoc, "to match this '{'");
679 Lex.Lex(); // eat the '}'.
684 /// ParseType - Parse and return a tblgen type. This returns null on error.
686 /// Type ::= STRING // string type
687 /// Type ::= CODE // code type
688 /// Type ::= BIT // bit type
689 /// Type ::= BITS '<' INTVAL '>' // bits<x> type
690 /// Type ::= INT // int type
691 /// Type ::= LIST '<' Type '>' // list<x> type
692 /// Type ::= DAG // dag type
693 /// Type ::= ClassID // Record Type
695 RecTy *TGParser::ParseType() {
696 switch (Lex.getCode()) {
697 default: TokError("Unknown token when expecting a type"); return nullptr;
698 case tgtok::String: Lex.Lex(); return StringRecTy::get();
699 case tgtok::Code: Lex.Lex(); return StringRecTy::get();
700 case tgtok::Bit: Lex.Lex(); return BitRecTy::get();
701 case tgtok::Int: Lex.Lex(); return IntRecTy::get();
702 case tgtok::Dag: Lex.Lex(); return DagRecTy::get();
704 if (Record *R = ParseClassID()) return RecordRecTy::get(R);
707 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
708 TokError("expected '<' after bits type");
711 if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
712 TokError("expected integer in bits<n> type");
715 uint64_t Val = Lex.getCurIntVal();
716 if (Lex.Lex() != tgtok::greater) { // Eat count.
717 TokError("expected '>' at end of bits<n> type");
720 Lex.Lex(); // Eat '>'
721 return BitsRecTy::get(Val);
724 if (Lex.Lex() != tgtok::less) { // Eat 'bits'
725 TokError("expected '<' after list type");
728 Lex.Lex(); // Eat '<'
729 RecTy *SubType = ParseType();
730 if (!SubType) return nullptr;
732 if (Lex.getCode() != tgtok::greater) {
733 TokError("expected '>' at end of list<ty> type");
736 Lex.Lex(); // Eat '>'
737 return ListRecTy::get(SubType);
742 /// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
743 /// has already been read.
744 Init *TGParser::ParseIDValue(Record *CurRec,
745 const std::string &Name, SMLoc NameLoc,
748 if (const RecordVal *RV = CurRec->getValue(Name))
749 return VarInit::get(Name, RV->getType());
751 Init *TemplateArgName = QualifyName(*CurRec, CurMultiClass, Name, ":");
754 TemplateArgName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
757 if (CurRec->isTemplateArg(TemplateArgName)) {
758 const RecordVal *RV = CurRec->getValue(TemplateArgName);
759 assert(RV && "Template arg doesn't exist??");
760 return VarInit::get(TemplateArgName, RV->getType());
765 Init *MCName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
768 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
769 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
770 assert(RV && "Template arg doesn't exist??");
771 return VarInit::get(MCName, RV->getType());
775 // If this is in a foreach loop, make sure it's not a loop iterator
776 for (LoopVector::iterator i = Loops.begin(), iend = Loops.end();
779 VarInit *IterVar = dyn_cast<VarInit>(i->IterVar);
780 if (IterVar && IterVar->getName() == Name)
784 if (Mode == ParseNameMode)
785 return StringInit::get(Name);
787 if (Record *D = Records.getDef(Name))
788 return DefInit::get(D);
790 if (Mode == ParseValueMode) {
791 Error(NameLoc, "Variable not defined: '" + Name + "'");
795 return StringInit::get(Name);
798 /// ParseOperation - Parse an operator. This returns null on error.
800 /// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
802 Init *TGParser::ParseOperation(Record *CurRec, RecTy *ItemType) {
803 switch (Lex.getCode()) {
805 TokError("unknown operation");
810 case tgtok::XCast: { // Value ::= !unop '(' Value ')'
811 UnOpInit::UnaryOp Code;
812 RecTy *Type = nullptr;
814 switch (Lex.getCode()) {
815 default: llvm_unreachable("Unhandled code!");
817 Lex.Lex(); // eat the operation
818 Code = UnOpInit::CAST;
820 Type = ParseOperatorType();
823 TokError("did not get type for unary operator");
829 Lex.Lex(); // eat the operation
830 Code = UnOpInit::HEAD;
833 Lex.Lex(); // eat the operation
834 Code = UnOpInit::TAIL;
837 Lex.Lex(); // eat the operation
838 Code = UnOpInit::EMPTY;
839 Type = IntRecTy::get();
842 if (Lex.getCode() != tgtok::l_paren) {
843 TokError("expected '(' after unary operator");
846 Lex.Lex(); // eat the '('
848 Init *LHS = ParseValue(CurRec);
849 if (!LHS) return nullptr;
851 if (Code == UnOpInit::HEAD
852 || Code == UnOpInit::TAIL
853 || Code == UnOpInit::EMPTY) {
854 ListInit *LHSl = dyn_cast<ListInit>(LHS);
855 StringInit *LHSs = dyn_cast<StringInit>(LHS);
856 TypedInit *LHSt = dyn_cast<TypedInit>(LHS);
857 if (!LHSl && !LHSs && !LHSt) {
858 TokError("expected list or string type argument in unary operator");
862 ListRecTy *LType = dyn_cast<ListRecTy>(LHSt->getType());
863 StringRecTy *SType = dyn_cast<StringRecTy>(LHSt->getType());
864 if (!LType && !SType) {
865 TokError("expected list or string type argument in unary operator");
870 if (Code == UnOpInit::HEAD
871 || Code == UnOpInit::TAIL) {
872 if (!LHSl && !LHSt) {
873 TokError("expected list type argument in unary operator");
877 if (LHSl && LHSl->getSize() == 0) {
878 TokError("empty list argument in unary operator");
882 Init *Item = LHSl->getElement(0);
883 TypedInit *Itemt = dyn_cast<TypedInit>(Item);
885 TokError("untyped list element in unary operator");
888 if (Code == UnOpInit::HEAD) {
889 Type = Itemt->getType();
891 Type = ListRecTy::get(Itemt->getType());
894 assert(LHSt && "expected list type argument in unary operator");
895 ListRecTy *LType = dyn_cast<ListRecTy>(LHSt->getType());
897 TokError("expected list type argument in unary operator");
900 if (Code == UnOpInit::HEAD) {
901 Type = LType->getElementType();
909 if (Lex.getCode() != tgtok::r_paren) {
910 TokError("expected ')' in unary operator");
913 Lex.Lex(); // eat the ')'
914 return (UnOpInit::get(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
924 case tgtok::XListConcat:
925 case tgtok::XStrConcat: { // Value ::= !binop '(' Value ',' Value ')'
926 tgtok::TokKind OpTok = Lex.getCode();
927 SMLoc OpLoc = Lex.getLoc();
928 Lex.Lex(); // eat the operation
930 BinOpInit::BinaryOp Code;
931 RecTy *Type = nullptr;
934 default: llvm_unreachable("Unhandled code!");
935 case tgtok::XConcat: Code = BinOpInit::CONCAT;Type = DagRecTy::get(); break;
936 case tgtok::XADD: Code = BinOpInit::ADD; Type = IntRecTy::get(); break;
937 case tgtok::XAND: Code = BinOpInit::AND; Type = IntRecTy::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::XListConcat:
943 Code = BinOpInit::LISTCONCAT;
944 // We don't know the list type until we parse the first argument
946 case tgtok::XStrConcat:
947 Code = BinOpInit::STRCONCAT;
948 Type = StringRecTy::get();
952 if (Lex.getCode() != tgtok::l_paren) {
953 TokError("expected '(' after binary operator");
956 Lex.Lex(); // eat the '('
958 SmallVector<Init*, 2> InitList;
960 InitList.push_back(ParseValue(CurRec));
961 if (!InitList.back()) return nullptr;
963 while (Lex.getCode() == tgtok::comma) {
964 Lex.Lex(); // eat the ','
966 InitList.push_back(ParseValue(CurRec));
967 if (!InitList.back()) return nullptr;
970 if (Lex.getCode() != tgtok::r_paren) {
971 TokError("expected ')' in operator");
974 Lex.Lex(); // eat the ')'
976 // If we are doing !listconcat, we should know the type by now
977 if (OpTok == tgtok::XListConcat) {
978 if (VarInit *Arg0 = dyn_cast<VarInit>(InitList[0]))
979 Type = Arg0->getType();
980 else if (ListInit *Arg0 = dyn_cast<ListInit>(InitList[0]))
981 Type = Arg0->getType();
984 Error(OpLoc, "expected a list");
989 // We allow multiple operands to associative operators like !strconcat as
990 // shorthand for nesting them.
991 if (Code == BinOpInit::STRCONCAT || Code == BinOpInit::LISTCONCAT) {
992 while (InitList.size() > 2) {
993 Init *RHS = InitList.pop_back_val();
994 RHS = (BinOpInit::get(Code, InitList.back(), RHS, Type))
995 ->Fold(CurRec, CurMultiClass);
996 InitList.back() = RHS;
1000 if (InitList.size() == 2)
1001 return (BinOpInit::get(Code, InitList[0], InitList[1], Type))
1002 ->Fold(CurRec, CurMultiClass);
1004 Error(OpLoc, "expected two operands to operator");
1009 case tgtok::XForEach:
1010 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
1011 TernOpInit::TernaryOp Code;
1012 RecTy *Type = nullptr;
1014 tgtok::TokKind LexCode = Lex.getCode();
1015 Lex.Lex(); // eat the operation
1017 default: llvm_unreachable("Unhandled code!");
1019 Code = TernOpInit::IF;
1021 case tgtok::XForEach:
1022 Code = TernOpInit::FOREACH;
1025 Code = TernOpInit::SUBST;
1028 if (Lex.getCode() != tgtok::l_paren) {
1029 TokError("expected '(' after ternary operator");
1032 Lex.Lex(); // eat the '('
1034 Init *LHS = ParseValue(CurRec);
1035 if (!LHS) return nullptr;
1037 if (Lex.getCode() != tgtok::comma) {
1038 TokError("expected ',' in ternary operator");
1041 Lex.Lex(); // eat the ','
1043 Init *MHS = ParseValue(CurRec, ItemType);
1047 if (Lex.getCode() != tgtok::comma) {
1048 TokError("expected ',' in ternary operator");
1051 Lex.Lex(); // eat the ','
1053 Init *RHS = ParseValue(CurRec, ItemType);
1057 if (Lex.getCode() != tgtok::r_paren) {
1058 TokError("expected ')' in binary operator");
1061 Lex.Lex(); // eat the ')'
1064 default: llvm_unreachable("Unhandled code!");
1066 RecTy *MHSTy = nullptr;
1067 RecTy *RHSTy = nullptr;
1069 if (TypedInit *MHSt = dyn_cast<TypedInit>(MHS))
1070 MHSTy = MHSt->getType();
1071 if (BitsInit *MHSbits = dyn_cast<BitsInit>(MHS))
1072 MHSTy = BitsRecTy::get(MHSbits->getNumBits());
1073 if (isa<BitInit>(MHS))
1074 MHSTy = BitRecTy::get();
1076 if (TypedInit *RHSt = dyn_cast<TypedInit>(RHS))
1077 RHSTy = RHSt->getType();
1078 if (BitsInit *RHSbits = dyn_cast<BitsInit>(RHS))
1079 RHSTy = BitsRecTy::get(RHSbits->getNumBits());
1080 if (isa<BitInit>(RHS))
1081 RHSTy = BitRecTy::get();
1083 // For UnsetInit, it's typed from the other hand.
1084 if (isa<UnsetInit>(MHS))
1086 if (isa<UnsetInit>(RHS))
1089 if (!MHSTy || !RHSTy) {
1090 TokError("could not get type for !if");
1094 if (MHSTy->typeIsConvertibleTo(RHSTy)) {
1096 } else if (RHSTy->typeIsConvertibleTo(MHSTy)) {
1099 TokError("inconsistent types for !if");
1104 case tgtok::XForEach: {
1105 TypedInit *MHSt = dyn_cast<TypedInit>(MHS);
1107 TokError("could not get type for !foreach");
1110 Type = MHSt->getType();
1113 case tgtok::XSubst: {
1114 TypedInit *RHSt = dyn_cast<TypedInit>(RHS);
1116 TokError("could not get type for !subst");
1119 Type = RHSt->getType();
1123 return (TernOpInit::get(Code, LHS, MHS, RHS, Type))->Fold(CurRec,
1129 /// ParseOperatorType - Parse a type for an operator. This returns
1132 /// OperatorType ::= '<' Type '>'
1134 RecTy *TGParser::ParseOperatorType() {
1135 RecTy *Type = nullptr;
1137 if (Lex.getCode() != tgtok::less) {
1138 TokError("expected type name for operator");
1141 Lex.Lex(); // eat the <
1146 TokError("expected type name for operator");
1150 if (Lex.getCode() != tgtok::greater) {
1151 TokError("expected type name for operator");
1154 Lex.Lex(); // eat the >
1160 /// ParseSimpleValue - Parse a tblgen value. This returns null on error.
1162 /// SimpleValue ::= IDValue
1163 /// SimpleValue ::= INTVAL
1164 /// SimpleValue ::= STRVAL+
1165 /// SimpleValue ::= CODEFRAGMENT
1166 /// SimpleValue ::= '?'
1167 /// SimpleValue ::= '{' ValueList '}'
1168 /// SimpleValue ::= ID '<' ValueListNE '>'
1169 /// SimpleValue ::= '[' ValueList ']'
1170 /// SimpleValue ::= '(' IDValue DagArgList ')'
1171 /// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
1172 /// SimpleValue ::= ADDTOK '(' Value ',' Value ')'
1173 /// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
1174 /// SimpleValue ::= SRATOK '(' Value ',' Value ')'
1175 /// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
1176 /// SimpleValue ::= LISTCONCATTOK '(' Value ',' Value ')'
1177 /// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
1179 Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType,
1182 switch (Lex.getCode()) {
1183 default: TokError("Unknown token when parsing a value"); break;
1185 // This is a leading paste operation. This is deprecated but
1186 // still exists in some .td files. Ignore it.
1187 Lex.Lex(); // Skip '#'.
1188 return ParseSimpleValue(CurRec, ItemType, Mode);
1189 case tgtok::IntVal: R = IntInit::get(Lex.getCurIntVal()); Lex.Lex(); break;
1190 case tgtok::BinaryIntVal: {
1191 auto BinaryVal = Lex.getCurBinaryIntVal();
1192 SmallVector<Init*, 16> Bits(BinaryVal.second);
1193 for (unsigned i = 0, e = BinaryVal.second; i != e; ++i)
1194 Bits[i] = BitInit::get(BinaryVal.first & (1LL << i));
1195 R = BitsInit::get(Bits);
1199 case tgtok::StrVal: {
1200 std::string Val = Lex.getCurStrVal();
1203 // Handle multiple consecutive concatenated strings.
1204 while (Lex.getCode() == tgtok::StrVal) {
1205 Val += Lex.getCurStrVal();
1209 R = StringInit::get(Val);
1212 case tgtok::CodeFragment:
1213 R = StringInit::get(Lex.getCurStrVal());
1216 case tgtok::question:
1217 R = UnsetInit::get();
1221 SMLoc NameLoc = Lex.getLoc();
1222 std::string Name = Lex.getCurStrVal();
1223 if (Lex.Lex() != tgtok::less) // consume the Id.
1224 return ParseIDValue(CurRec, Name, NameLoc, Mode); // Value ::= IDValue
1226 // Value ::= ID '<' ValueListNE '>'
1227 if (Lex.Lex() == tgtok::greater) {
1228 TokError("expected non-empty value list");
1232 // This is a CLASS<initvalslist> expression. This is supposed to synthesize
1233 // a new anonymous definition, deriving from CLASS<initvalslist> with no
1235 Record *Class = Records.getClass(Name);
1237 Error(NameLoc, "Expected a class name, got '" + Name + "'");
1241 std::vector<Init*> ValueList = ParseValueList(CurRec, Class);
1242 if (ValueList.empty()) return nullptr;
1244 if (Lex.getCode() != tgtok::greater) {
1245 TokError("expected '>' at end of value list");
1248 Lex.Lex(); // eat the '>'
1249 SMLoc EndLoc = Lex.getLoc();
1251 // Create the new record, set it as CurRec temporarily.
1252 Record *NewRec = new Record(GetNewAnonymousName(), NameLoc, Records,
1253 /*IsAnonymous=*/true);
1254 SubClassReference SCRef;
1255 SCRef.RefRange = SMRange(NameLoc, EndLoc);
1257 SCRef.TemplateArgs = ValueList;
1258 // Add info about the subclass to NewRec.
1259 if (AddSubClass(NewRec, SCRef)) {
1263 if (!CurMultiClass) {
1264 NewRec->resolveReferences();
1265 Records.addDef(NewRec);
1267 // Otherwise, we're inside a multiclass, add it to the multiclass.
1268 CurMultiClass->DefPrototypes.push_back(NewRec);
1270 // Copy the template arguments for the multiclass into the def.
1271 const std::vector<Init *> &TArgs =
1272 CurMultiClass->Rec.getTemplateArgs();
1274 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1275 const RecordVal *RV = CurMultiClass->Rec.getValue(TArgs[i]);
1276 assert(RV && "Template arg doesn't exist?");
1277 NewRec->addValue(*RV);
1280 // We can't return the prototype def here, instead return:
1281 // !cast<ItemType>(!strconcat(NAME, AnonName)).
1282 const RecordVal *MCNameRV = CurMultiClass->Rec.getValue("NAME");
1283 assert(MCNameRV && "multiclass record must have a NAME");
1285 return UnOpInit::get(UnOpInit::CAST,
1286 BinOpInit::get(BinOpInit::STRCONCAT,
1287 VarInit::get(MCNameRV->getName(),
1288 MCNameRV->getType()),
1289 NewRec->getNameInit(),
1290 StringRecTy::get()),
1291 Class->getDefInit()->getType());
1294 // The result of the expression is a reference to the new record.
1295 return DefInit::get(NewRec);
1297 case tgtok::l_brace: { // Value ::= '{' ValueList '}'
1298 SMLoc BraceLoc = Lex.getLoc();
1299 Lex.Lex(); // eat the '{'
1300 std::vector<Init*> Vals;
1302 if (Lex.getCode() != tgtok::r_brace) {
1303 Vals = ParseValueList(CurRec);
1304 if (Vals.empty()) return nullptr;
1306 if (Lex.getCode() != tgtok::r_brace) {
1307 TokError("expected '}' at end of bit list value");
1310 Lex.Lex(); // eat the '}'
1312 SmallVector<Init *, 16> NewBits;
1314 // As we parse { a, b, ... }, 'a' is the highest bit, but we parse it
1315 // first. We'll first read everything in to a vector, then we can reverse
1316 // it to get the bits in the correct order for the BitsInit value.
1317 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1318 // bits<n> values are allowed to initialize n bits.
1319 if (BitsInit *BI = dyn_cast<BitsInit>(Vals[i])) {
1320 for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
1321 NewBits.push_back(BI->getBit((e - i) - 1));
1324 // All other values must be convertible to just a single bit.
1325 Init *Bit = Vals[i]->convertInitializerTo(BitRecTy::get());
1327 Error(BraceLoc, "Element #" + utostr(i) + " (" + Vals[i]->getAsString()+
1328 ") is not convertable to a bit");
1331 NewBits.push_back(Bit);
1333 std::reverse(NewBits.begin(), NewBits.end());
1334 return BitsInit::get(NewBits);
1336 case tgtok::l_square: { // Value ::= '[' ValueList ']'
1337 Lex.Lex(); // eat the '['
1338 std::vector<Init*> Vals;
1340 RecTy *DeducedEltTy = nullptr;
1341 ListRecTy *GivenListTy = nullptr;
1344 ListRecTy *ListType = dyn_cast<ListRecTy>(ItemType);
1347 raw_string_ostream ss(s);
1348 ss << "Type mismatch for list, expected list type, got "
1349 << ItemType->getAsString();
1353 GivenListTy = ListType;
1356 if (Lex.getCode() != tgtok::r_square) {
1357 Vals = ParseValueList(CurRec, nullptr,
1358 GivenListTy ? GivenListTy->getElementType() : nullptr);
1359 if (Vals.empty()) return nullptr;
1361 if (Lex.getCode() != tgtok::r_square) {
1362 TokError("expected ']' at end of list value");
1365 Lex.Lex(); // eat the ']'
1367 RecTy *GivenEltTy = nullptr;
1368 if (Lex.getCode() == tgtok::less) {
1369 // Optional list element type
1370 Lex.Lex(); // eat the '<'
1372 GivenEltTy = ParseType();
1374 // Couldn't parse element type
1378 if (Lex.getCode() != tgtok::greater) {
1379 TokError("expected '>' at end of list element type");
1382 Lex.Lex(); // eat the '>'
1386 RecTy *EltTy = nullptr;
1387 for (std::vector<Init *>::iterator i = Vals.begin(), ie = Vals.end();
1390 TypedInit *TArg = dyn_cast<TypedInit>(*i);
1392 TokError("Untyped list element");
1396 EltTy = resolveTypes(EltTy, TArg->getType());
1398 TokError("Incompatible types in list elements");
1402 EltTy = TArg->getType();
1408 // Verify consistency
1409 if (!EltTy->typeIsConvertibleTo(GivenEltTy)) {
1410 TokError("Incompatible types in list elements");
1419 TokError("No type for list");
1422 DeducedEltTy = GivenListTy->getElementType();
1424 // Make sure the deduced type is compatible with the given type
1426 if (!EltTy->typeIsConvertibleTo(GivenListTy->getElementType())) {
1427 TokError("Element type mismatch for list");
1431 DeducedEltTy = EltTy;
1434 return ListInit::get(Vals, DeducedEltTy);
1436 case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
1437 Lex.Lex(); // eat the '('
1438 if (Lex.getCode() != tgtok::Id && Lex.getCode() != tgtok::XCast) {
1439 TokError("expected identifier in dag init");
1443 Init *Operator = ParseValue(CurRec);
1444 if (!Operator) return nullptr;
1446 // If the operator name is present, parse it.
1447 std::string OperatorName;
1448 if (Lex.getCode() == tgtok::colon) {
1449 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1450 TokError("expected variable name in dag operator");
1453 OperatorName = Lex.getCurStrVal();
1454 Lex.Lex(); // eat the VarName.
1457 std::vector<std::pair<llvm::Init*, std::string> > DagArgs;
1458 if (Lex.getCode() != tgtok::r_paren) {
1459 DagArgs = ParseDagArgList(CurRec);
1460 if (DagArgs.empty()) return nullptr;
1463 if (Lex.getCode() != tgtok::r_paren) {
1464 TokError("expected ')' in dag init");
1467 Lex.Lex(); // eat the ')'
1469 return DagInit::get(Operator, OperatorName, DagArgs);
1475 case tgtok::XCast: // Value ::= !unop '(' Value ')'
1476 case tgtok::XConcat:
1483 case tgtok::XListConcat:
1484 case tgtok::XStrConcat: // Value ::= !binop '(' Value ',' Value ')'
1486 case tgtok::XForEach:
1487 case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
1488 return ParseOperation(CurRec, ItemType);
1495 /// ParseValue - Parse a tblgen value. This returns null on error.
1497 /// Value ::= SimpleValue ValueSuffix*
1498 /// ValueSuffix ::= '{' BitList '}'
1499 /// ValueSuffix ::= '[' BitList ']'
1500 /// ValueSuffix ::= '.' ID
1502 Init *TGParser::ParseValue(Record *CurRec, RecTy *ItemType, IDParseMode Mode) {
1503 Init *Result = ParseSimpleValue(CurRec, ItemType, Mode);
1504 if (!Result) return nullptr;
1506 // Parse the suffixes now if present.
1508 switch (Lex.getCode()) {
1509 default: return Result;
1510 case tgtok::l_brace: {
1511 if (Mode == ParseNameMode || Mode == ParseForeachMode)
1512 // This is the beginning of the object body.
1515 SMLoc CurlyLoc = Lex.getLoc();
1516 Lex.Lex(); // eat the '{'
1517 std::vector<unsigned> Ranges = ParseRangeList();
1518 if (Ranges.empty()) return nullptr;
1520 // Reverse the bitlist.
1521 std::reverse(Ranges.begin(), Ranges.end());
1522 Result = Result->convertInitializerBitRange(Ranges);
1524 Error(CurlyLoc, "Invalid bit range for value");
1529 if (Lex.getCode() != tgtok::r_brace) {
1530 TokError("expected '}' at end of bit range list");
1536 case tgtok::l_square: {
1537 SMLoc SquareLoc = Lex.getLoc();
1538 Lex.Lex(); // eat the '['
1539 std::vector<unsigned> Ranges = ParseRangeList();
1540 if (Ranges.empty()) return nullptr;
1542 Result = Result->convertInitListSlice(Ranges);
1544 Error(SquareLoc, "Invalid range for list slice");
1549 if (Lex.getCode() != tgtok::r_square) {
1550 TokError("expected ']' at end of list slice");
1557 if (Lex.Lex() != tgtok::Id) { // eat the .
1558 TokError("expected field identifier after '.'");
1561 if (!Result->getFieldType(Lex.getCurStrVal())) {
1562 TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
1563 Result->getAsString() + "'");
1566 Result = FieldInit::get(Result, Lex.getCurStrVal());
1567 Lex.Lex(); // eat field name
1571 SMLoc PasteLoc = Lex.getLoc();
1573 // Create a !strconcat() operation, first casting each operand to
1574 // a string if necessary.
1576 TypedInit *LHS = dyn_cast<TypedInit>(Result);
1578 Error(PasteLoc, "LHS of paste is not typed!");
1582 if (LHS->getType() != StringRecTy::get()) {
1583 LHS = UnOpInit::get(UnOpInit::CAST, LHS, StringRecTy::get());
1586 TypedInit *RHS = nullptr;
1588 Lex.Lex(); // Eat the '#'.
1589 switch (Lex.getCode()) {
1592 case tgtok::l_brace:
1593 // These are all of the tokens that can begin an object body.
1594 // Some of these can also begin values but we disallow those cases
1595 // because they are unlikely to be useful.
1597 // Trailing paste, concat with an empty string.
1598 RHS = StringInit::get("");
1602 Init *RHSResult = ParseValue(CurRec, ItemType, ParseNameMode);
1603 RHS = dyn_cast<TypedInit>(RHSResult);
1605 Error(PasteLoc, "RHS of paste is not typed!");
1609 if (RHS->getType() != StringRecTy::get()) {
1610 RHS = UnOpInit::get(UnOpInit::CAST, RHS, StringRecTy::get());
1616 Result = BinOpInit::get(BinOpInit::STRCONCAT, LHS, RHS,
1617 StringRecTy::get())->Fold(CurRec, CurMultiClass);
1623 /// ParseDagArgList - Parse the argument list for a dag literal expression.
1625 /// DagArg ::= Value (':' VARNAME)?
1626 /// DagArg ::= VARNAME
1627 /// DagArgList ::= DagArg
1628 /// DagArgList ::= DagArgList ',' DagArg
1629 std::vector<std::pair<llvm::Init*, std::string> >
1630 TGParser::ParseDagArgList(Record *CurRec) {
1631 std::vector<std::pair<llvm::Init*, std::string> > Result;
1634 // DagArg ::= VARNAME
1635 if (Lex.getCode() == tgtok::VarName) {
1636 // A missing value is treated like '?'.
1637 Result.push_back(std::make_pair(UnsetInit::get(), Lex.getCurStrVal()));
1640 // DagArg ::= Value (':' VARNAME)?
1641 Init *Val = ParseValue(CurRec);
1643 return std::vector<std::pair<llvm::Init*, std::string> >();
1645 // If the variable name is present, add it.
1646 std::string VarName;
1647 if (Lex.getCode() == tgtok::colon) {
1648 if (Lex.Lex() != tgtok::VarName) { // eat the ':'
1649 TokError("expected variable name in dag literal");
1650 return std::vector<std::pair<llvm::Init*, std::string> >();
1652 VarName = Lex.getCurStrVal();
1653 Lex.Lex(); // eat the VarName.
1656 Result.push_back(std::make_pair(Val, VarName));
1658 if (Lex.getCode() != tgtok::comma) break;
1659 Lex.Lex(); // eat the ','
1666 /// ParseValueList - Parse a comma separated list of values, returning them as a
1667 /// vector. Note that this always expects to be able to parse at least one
1668 /// value. It returns an empty list if this is not possible.
1670 /// ValueList ::= Value (',' Value)
1672 std::vector<Init*> TGParser::ParseValueList(Record *CurRec, Record *ArgsRec,
1674 std::vector<Init*> Result;
1675 RecTy *ItemType = EltTy;
1676 unsigned int ArgN = 0;
1677 if (ArgsRec && !EltTy) {
1678 const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
1679 if (!TArgs.size()) {
1680 TokError("template argument provided to non-template class");
1681 return std::vector<Init*>();
1683 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1685 errs() << "Cannot find template arg " << ArgN << " (" << TArgs[ArgN]
1688 assert(RV && "Template argument record not found??");
1689 ItemType = RV->getType();
1692 Result.push_back(ParseValue(CurRec, ItemType));
1693 if (!Result.back()) return std::vector<Init*>();
1695 while (Lex.getCode() == tgtok::comma) {
1696 Lex.Lex(); // Eat the comma
1698 if (ArgsRec && !EltTy) {
1699 const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
1700 if (ArgN >= TArgs.size()) {
1701 TokError("too many template arguments");
1702 return std::vector<Init*>();
1704 const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
1705 assert(RV && "Template argument record not found??");
1706 ItemType = RV->getType();
1709 Result.push_back(ParseValue(CurRec, ItemType));
1710 if (!Result.back()) return std::vector<Init*>();
1717 /// ParseDeclaration - Read a declaration, returning the name of field ID, or an
1718 /// empty string on error. This can happen in a number of different context's,
1719 /// including within a def or in the template args for a def (which which case
1720 /// CurRec will be non-null) and within the template args for a multiclass (in
1721 /// which case CurRec will be null, but CurMultiClass will be set). This can
1722 /// also happen within a def that is within a multiclass, which will set both
1723 /// CurRec and CurMultiClass.
1725 /// Declaration ::= FIELD? Type ID ('=' Value)?
1727 Init *TGParser::ParseDeclaration(Record *CurRec,
1728 bool ParsingTemplateArgs) {
1729 // Read the field prefix if present.
1730 bool HasField = Lex.getCode() == tgtok::Field;
1731 if (HasField) Lex.Lex();
1733 RecTy *Type = ParseType();
1734 if (!Type) return nullptr;
1736 if (Lex.getCode() != tgtok::Id) {
1737 TokError("Expected identifier in declaration");
1741 SMLoc IdLoc = Lex.getLoc();
1742 Init *DeclName = StringInit::get(Lex.getCurStrVal());
1745 if (ParsingTemplateArgs) {
1747 DeclName = QualifyName(*CurRec, CurMultiClass, DeclName, ":");
1749 assert(CurMultiClass);
1752 DeclName = QualifyName(CurMultiClass->Rec, CurMultiClass, DeclName,
1757 if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
1760 // If a value is present, parse it.
1761 if (Lex.getCode() == tgtok::equal) {
1763 SMLoc ValLoc = Lex.getLoc();
1764 Init *Val = ParseValue(CurRec, Type);
1766 SetValue(CurRec, ValLoc, DeclName, std::vector<unsigned>(), Val))
1767 // Return the name, even if an error is thrown. This is so that we can
1768 // continue to make some progress, even without the value having been
1776 /// ParseForeachDeclaration - Read a foreach declaration, returning
1777 /// the name of the declared object or a NULL Init on error. Return
1778 /// the name of the parsed initializer list through ForeachListName.
1780 /// ForeachDeclaration ::= ID '=' '[' ValueList ']'
1781 /// ForeachDeclaration ::= ID '=' '{' RangeList '}'
1782 /// ForeachDeclaration ::= ID '=' RangePiece
1784 VarInit *TGParser::ParseForeachDeclaration(ListInit *&ForeachListValue) {
1785 if (Lex.getCode() != tgtok::Id) {
1786 TokError("Expected identifier in foreach declaration");
1790 Init *DeclName = StringInit::get(Lex.getCurStrVal());
1793 // If a value is present, parse it.
1794 if (Lex.getCode() != tgtok::equal) {
1795 TokError("Expected '=' in foreach declaration");
1798 Lex.Lex(); // Eat the '='
1800 RecTy *IterType = nullptr;
1801 std::vector<unsigned> Ranges;
1803 switch (Lex.getCode()) {
1804 default: TokError("Unknown token when expecting a range list"); return nullptr;
1805 case tgtok::l_square: { // '[' ValueList ']'
1806 Init *List = ParseSimpleValue(nullptr, nullptr, ParseForeachMode);
1807 ForeachListValue = dyn_cast<ListInit>(List);
1808 if (!ForeachListValue) {
1809 TokError("Expected a Value list");
1812 RecTy *ValueType = ForeachListValue->getType();
1813 ListRecTy *ListType = dyn_cast<ListRecTy>(ValueType);
1815 TokError("Value list is not of list type");
1818 IterType = ListType->getElementType();
1822 case tgtok::IntVal: { // RangePiece.
1823 if (ParseRangePiece(Ranges))
1828 case tgtok::l_brace: { // '{' RangeList '}'
1829 Lex.Lex(); // eat the '{'
1830 Ranges = ParseRangeList();
1831 if (Lex.getCode() != tgtok::r_brace) {
1832 TokError("expected '}' at end of bit range list");
1840 if (!Ranges.empty()) {
1841 assert(!IterType && "Type already initialized?");
1842 IterType = IntRecTy::get();
1843 std::vector<Init*> Values;
1844 for (unsigned i = 0, e = Ranges.size(); i != e; ++i)
1845 Values.push_back(IntInit::get(Ranges[i]));
1846 ForeachListValue = ListInit::get(Values, IterType);
1852 return VarInit::get(DeclName, IterType);
1855 /// ParseTemplateArgList - Read a template argument list, which is a non-empty
1856 /// sequence of template-declarations in <>'s. If CurRec is non-null, these are
1857 /// template args for a def, which may or may not be in a multiclass. If null,
1858 /// these are the template args for a multiclass.
1860 /// TemplateArgList ::= '<' Declaration (',' Declaration)* '>'
1862 bool TGParser::ParseTemplateArgList(Record *CurRec) {
1863 assert(Lex.getCode() == tgtok::less && "Not a template arg list!");
1864 Lex.Lex(); // eat the '<'
1866 Record *TheRecToAddTo = CurRec ? CurRec : &CurMultiClass->Rec;
1868 // Read the first declaration.
1869 Init *TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1873 TheRecToAddTo->addTemplateArg(TemplArg);
1875 while (Lex.getCode() == tgtok::comma) {
1876 Lex.Lex(); // eat the ','
1878 // Read the following declarations.
1879 TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
1882 TheRecToAddTo->addTemplateArg(TemplArg);
1885 if (Lex.getCode() != tgtok::greater)
1886 return TokError("expected '>' at end of template argument list");
1887 Lex.Lex(); // eat the '>'.
1892 /// ParseBodyItem - Parse a single item at within the body of a def or class.
1894 /// BodyItem ::= Declaration ';'
1895 /// BodyItem ::= LET ID OptionalBitList '=' Value ';'
1896 bool TGParser::ParseBodyItem(Record *CurRec) {
1897 if (Lex.getCode() != tgtok::Let) {
1898 if (!ParseDeclaration(CurRec, false))
1901 if (Lex.getCode() != tgtok::semi)
1902 return TokError("expected ';' after declaration");
1907 // LET ID OptionalRangeList '=' Value ';'
1908 if (Lex.Lex() != tgtok::Id)
1909 return TokError("expected field identifier after let");
1911 SMLoc IdLoc = Lex.getLoc();
1912 std::string FieldName = Lex.getCurStrVal();
1913 Lex.Lex(); // eat the field name.
1915 std::vector<unsigned> BitList;
1916 if (ParseOptionalBitList(BitList))
1918 std::reverse(BitList.begin(), BitList.end());
1920 if (Lex.getCode() != tgtok::equal)
1921 return TokError("expected '=' in let expression");
1922 Lex.Lex(); // eat the '='.
1924 RecordVal *Field = CurRec->getValue(FieldName);
1926 return TokError("Value '" + FieldName + "' unknown!");
1928 RecTy *Type = Field->getType();
1930 Init *Val = ParseValue(CurRec, Type);
1931 if (!Val) return true;
1933 if (Lex.getCode() != tgtok::semi)
1934 return TokError("expected ';' after let expression");
1937 return SetValue(CurRec, IdLoc, FieldName, BitList, Val);
1940 /// ParseBody - Read the body of a class or def. Return true on error, false on
1944 /// Body ::= '{' BodyList '}'
1945 /// BodyList BodyItem*
1947 bool TGParser::ParseBody(Record *CurRec) {
1948 // If this is a null definition, just eat the semi and return.
1949 if (Lex.getCode() == tgtok::semi) {
1954 if (Lex.getCode() != tgtok::l_brace)
1955 return TokError("Expected ';' or '{' to start body");
1959 while (Lex.getCode() != tgtok::r_brace)
1960 if (ParseBodyItem(CurRec))
1968 /// \brief Apply the current let bindings to \a CurRec.
1969 /// \returns true on error, false otherwise.
1970 bool TGParser::ApplyLetStack(Record *CurRec) {
1971 for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
1972 for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
1973 if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
1974 LetStack[i][j].Bits, LetStack[i][j].Value))
1979 /// ParseObjectBody - Parse the body of a def or class. This consists of an
1980 /// optional ClassList followed by a Body. CurRec is the current def or class
1981 /// that is being parsed.
1983 /// ObjectBody ::= BaseClassList Body
1984 /// BaseClassList ::= /*empty*/
1985 /// BaseClassList ::= ':' BaseClassListNE
1986 /// BaseClassListNE ::= SubClassRef (',' SubClassRef)*
1988 bool TGParser::ParseObjectBody(Record *CurRec) {
1989 // If there is a baseclass list, read it.
1990 if (Lex.getCode() == tgtok::colon) {
1993 // Read all of the subclasses.
1994 SubClassReference SubClass = ParseSubClassReference(CurRec, false);
1997 if (!SubClass.Rec) return true;
2000 if (AddSubClass(CurRec, SubClass))
2003 if (Lex.getCode() != tgtok::comma) break;
2004 Lex.Lex(); // eat ','.
2005 SubClass = ParseSubClassReference(CurRec, false);
2009 if (ApplyLetStack(CurRec))
2012 return ParseBody(CurRec);
2015 /// ParseDef - Parse and return a top level or multiclass def, return the record
2016 /// corresponding to it. This returns null on error.
2018 /// DefInst ::= DEF ObjectName ObjectBody
2020 bool TGParser::ParseDef(MultiClass *CurMultiClass) {
2021 SMLoc DefLoc = Lex.getLoc();
2022 assert(Lex.getCode() == tgtok::Def && "Unknown tok");
2023 Lex.Lex(); // Eat the 'def' token.
2025 // Parse ObjectName and make a record for it.
2027 bool CurRecOwnershipTransferred = false;
2028 Init *Name = ParseObjectName(CurMultiClass);
2030 CurRec = new Record(Name, DefLoc, Records);
2032 CurRec = new Record(GetNewAnonymousName(), DefLoc, Records,
2033 /*IsAnonymous=*/true);
2035 if (!CurMultiClass && Loops.empty()) {
2036 // Top-level def definition.
2038 // Ensure redefinition doesn't happen.
2039 if (Records.getDef(CurRec->getNameInitAsString())) {
2040 Error(DefLoc, "def '" + CurRec->getNameInitAsString()
2041 + "' already defined");
2045 Records.addDef(CurRec);
2046 CurRecOwnershipTransferred = true;
2048 if (ParseObjectBody(CurRec))
2050 } else if (CurMultiClass) {
2051 // Parse the body before adding this prototype to the DefPrototypes vector.
2052 // That way implicit definitions will be added to the DefPrototypes vector
2053 // before this object, instantiated prior to defs derived from this object,
2054 // and this available for indirect name resolution when defs derived from
2055 // this object are instantiated.
2056 if (ParseObjectBody(CurRec)) {
2061 // Otherwise, a def inside a multiclass, add it to the multiclass.
2062 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
2063 if (CurMultiClass->DefPrototypes[i]->getNameInit()
2064 == CurRec->getNameInit()) {
2065 Error(DefLoc, "def '" + CurRec->getNameInitAsString() +
2066 "' already defined in this multiclass!");
2070 CurMultiClass->DefPrototypes.push_back(CurRec);
2071 CurRecOwnershipTransferred = true;
2072 } else if (ParseObjectBody(CurRec)) {
2077 if (!CurMultiClass) // Def's in multiclasses aren't really defs.
2078 // See Record::setName(). This resolve step will see any new name
2079 // for the def that might have been created when resolving
2080 // inheritance, values and arguments above.
2081 CurRec->resolveReferences();
2083 // If ObjectBody has template arguments, it's an error.
2084 assert(CurRec->getTemplateArgs().empty() && "How'd this get template args?");
2086 if (CurMultiClass) {
2087 // Copy the template arguments for the multiclass into the def.
2088 const std::vector<Init *> &TArgs =
2089 CurMultiClass->Rec.getTemplateArgs();
2091 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
2092 const RecordVal *RV = CurMultiClass->Rec.getValue(TArgs[i]);
2093 assert(RV && "Template arg doesn't exist?");
2094 CurRec->addValue(*RV);
2098 if (ProcessForeachDefs(CurRec, DefLoc)) {
2100 "Could not process loops for def" + CurRec->getNameInitAsString());
2101 if (!CurRecOwnershipTransferred)
2106 if (!CurRecOwnershipTransferred)
2111 /// ParseForeach - Parse a for statement. Return the record corresponding
2112 /// to it. This returns true on error.
2114 /// Foreach ::= FOREACH Declaration IN '{ ObjectList '}'
2115 /// Foreach ::= FOREACH Declaration IN Object
2117 bool TGParser::ParseForeach(MultiClass *CurMultiClass) {
2118 assert(Lex.getCode() == tgtok::Foreach && "Unknown tok");
2119 Lex.Lex(); // Eat the 'for' token.
2121 // Make a temporary object to record items associated with the for
2123 ListInit *ListValue = nullptr;
2124 VarInit *IterName = ParseForeachDeclaration(ListValue);
2126 return TokError("expected declaration in for");
2128 if (Lex.getCode() != tgtok::In)
2129 return TokError("Unknown tok");
2130 Lex.Lex(); // Eat the in
2132 // Create a loop object and remember it.
2133 Loops.push_back(ForeachLoop(IterName, ListValue));
2135 if (Lex.getCode() != tgtok::l_brace) {
2136 // FOREACH Declaration IN Object
2137 if (ParseObject(CurMultiClass))
2141 SMLoc BraceLoc = Lex.getLoc();
2142 // Otherwise, this is a group foreach.
2143 Lex.Lex(); // eat the '{'.
2145 // Parse the object list.
2146 if (ParseObjectList(CurMultiClass))
2149 if (Lex.getCode() != tgtok::r_brace) {
2150 TokError("expected '}' at end of foreach command");
2151 return Error(BraceLoc, "to match this '{'");
2153 Lex.Lex(); // Eat the }
2156 // We've processed everything in this loop.
2162 /// ParseClass - Parse a tblgen class definition.
2164 /// ClassInst ::= CLASS ID TemplateArgList? ObjectBody
2166 bool TGParser::ParseClass() {
2167 assert(Lex.getCode() == tgtok::Class && "Unexpected token!");
2170 if (Lex.getCode() != tgtok::Id)
2171 return TokError("expected class name after 'class' keyword");
2173 Record *CurRec = Records.getClass(Lex.getCurStrVal());
2175 // If the body was previously defined, this is an error.
2176 if (CurRec->getValues().size() > 1 || // Account for NAME.
2177 !CurRec->getSuperClasses().empty() ||
2178 !CurRec->getTemplateArgs().empty())
2179 return TokError("Class '" + CurRec->getNameInitAsString()
2180 + "' already defined");
2182 // If this is the first reference to this class, create and add it.
2183 CurRec = new Record(Lex.getCurStrVal(), Lex.getLoc(), Records);
2184 Records.addClass(CurRec);
2186 Lex.Lex(); // eat the name.
2188 // If there are template args, parse them.
2189 if (Lex.getCode() == tgtok::less)
2190 if (ParseTemplateArgList(CurRec))
2193 // Finally, parse the object body.
2194 return ParseObjectBody(CurRec);
2197 /// ParseLetList - Parse a non-empty list of assignment expressions into a list
2200 /// LetList ::= LetItem (',' LetItem)*
2201 /// LetItem ::= ID OptionalRangeList '=' Value
2203 std::vector<LetRecord> TGParser::ParseLetList() {
2204 std::vector<LetRecord> Result;
2207 if (Lex.getCode() != tgtok::Id) {
2208 TokError("expected identifier in let definition");
2209 return std::vector<LetRecord>();
2211 std::string Name = Lex.getCurStrVal();
2212 SMLoc NameLoc = Lex.getLoc();
2213 Lex.Lex(); // Eat the identifier.
2215 // Check for an optional RangeList.
2216 std::vector<unsigned> Bits;
2217 if (ParseOptionalRangeList(Bits))
2218 return std::vector<LetRecord>();
2219 std::reverse(Bits.begin(), Bits.end());
2221 if (Lex.getCode() != tgtok::equal) {
2222 TokError("expected '=' in let expression");
2223 return std::vector<LetRecord>();
2225 Lex.Lex(); // eat the '='.
2227 Init *Val = ParseValue(nullptr);
2228 if (!Val) return std::vector<LetRecord>();
2230 // Now that we have everything, add the record.
2231 Result.push_back(LetRecord(Name, Bits, Val, NameLoc));
2233 if (Lex.getCode() != tgtok::comma)
2235 Lex.Lex(); // eat the comma.
2239 /// ParseTopLevelLet - Parse a 'let' at top level. This can be a couple of
2240 /// different related productions. This works inside multiclasses too.
2242 /// Object ::= LET LetList IN '{' ObjectList '}'
2243 /// Object ::= LET LetList IN Object
2245 bool TGParser::ParseTopLevelLet(MultiClass *CurMultiClass) {
2246 assert(Lex.getCode() == tgtok::Let && "Unexpected token");
2249 // Add this entry to the let stack.
2250 std::vector<LetRecord> LetInfo = ParseLetList();
2251 if (LetInfo.empty()) return true;
2252 LetStack.push_back(LetInfo);
2254 if (Lex.getCode() != tgtok::In)
2255 return TokError("expected 'in' at end of top-level 'let'");
2258 // If this is a scalar let, just handle it now
2259 if (Lex.getCode() != tgtok::l_brace) {
2260 // LET LetList IN Object
2261 if (ParseObject(CurMultiClass))
2263 } else { // Object ::= LETCommand '{' ObjectList '}'
2264 SMLoc BraceLoc = Lex.getLoc();
2265 // Otherwise, this is a group let.
2266 Lex.Lex(); // eat the '{'.
2268 // Parse the object list.
2269 if (ParseObjectList(CurMultiClass))
2272 if (Lex.getCode() != tgtok::r_brace) {
2273 TokError("expected '}' at end of top level let command");
2274 return Error(BraceLoc, "to match this '{'");
2279 // Outside this let scope, this let block is not active.
2280 LetStack.pop_back();
2284 /// ParseMultiClass - Parse a multiclass definition.
2286 /// MultiClassInst ::= MULTICLASS ID TemplateArgList?
2287 /// ':' BaseMultiClassList '{' MultiClassObject+ '}'
2288 /// MultiClassObject ::= DefInst
2289 /// MultiClassObject ::= MultiClassInst
2290 /// MultiClassObject ::= DefMInst
2291 /// MultiClassObject ::= LETCommand '{' ObjectList '}'
2292 /// MultiClassObject ::= LETCommand Object
2294 bool TGParser::ParseMultiClass() {
2295 assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");
2296 Lex.Lex(); // Eat the multiclass token.
2298 if (Lex.getCode() != tgtok::Id)
2299 return TokError("expected identifier after multiclass for name");
2300 std::string Name = Lex.getCurStrVal();
2302 if (MultiClasses.count(Name))
2303 return TokError("multiclass '" + Name + "' already defined");
2305 CurMultiClass = MultiClasses[Name] = new MultiClass(Name,
2306 Lex.getLoc(), Records);
2307 Lex.Lex(); // Eat the identifier.
2309 // If there are template args, parse them.
2310 if (Lex.getCode() == tgtok::less)
2311 if (ParseTemplateArgList(nullptr))
2314 bool inherits = false;
2316 // If there are submulticlasses, parse them.
2317 if (Lex.getCode() == tgtok::colon) {
2322 // Read all of the submulticlasses.
2323 SubMultiClassReference SubMultiClass =
2324 ParseSubMultiClassReference(CurMultiClass);
2327 if (!SubMultiClass.MC) return true;
2330 if (AddSubMultiClass(CurMultiClass, SubMultiClass))
2333 if (Lex.getCode() != tgtok::comma) break;
2334 Lex.Lex(); // eat ','.
2335 SubMultiClass = ParseSubMultiClassReference(CurMultiClass);
2339 if (Lex.getCode() != tgtok::l_brace) {
2341 return TokError("expected '{' in multiclass definition");
2342 else if (Lex.getCode() != tgtok::semi)
2343 return TokError("expected ';' in multiclass definition");
2345 Lex.Lex(); // eat the ';'.
2347 if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
2348 return TokError("multiclass must contain at least one def");
2350 while (Lex.getCode() != tgtok::r_brace) {
2351 switch (Lex.getCode()) {
2353 return TokError("expected 'let', 'def' or 'defm' in multiclass body");
2357 case tgtok::Foreach:
2358 if (ParseObject(CurMultiClass))
2363 Lex.Lex(); // eat the '}'.
2366 CurMultiClass = nullptr;
2371 InstantiateMulticlassDef(MultiClass &MC,
2374 SMRange DefmPrefixRange) {
2375 // We need to preserve DefProto so it can be reused for later
2376 // instantiations, so create a new Record to inherit from it.
2378 // Add in the defm name. If the defm prefix is empty, give each
2379 // instantiated def a unique name. Otherwise, if "#NAME#" exists in the
2380 // name, substitute the prefix for #NAME#. Otherwise, use the defm name
2383 bool IsAnonymous = false;
2385 DefmPrefix = StringInit::get(GetNewAnonymousName());
2389 Init *DefName = DefProto->getNameInit();
2391 StringInit *DefNameString = dyn_cast<StringInit>(DefName);
2393 if (DefNameString) {
2394 // We have a fully expanded string so there are no operators to
2395 // resolve. We should concatenate the given prefix and name.
2397 BinOpInit::get(BinOpInit::STRCONCAT,
2398 UnOpInit::get(UnOpInit::CAST, DefmPrefix,
2399 StringRecTy::get())->Fold(DefProto, &MC),
2400 DefName, StringRecTy::get())->Fold(DefProto, &MC);
2403 // Make a trail of SMLocs from the multiclass instantiations.
2404 SmallVector<SMLoc, 4> Locs(1, DefmPrefixRange.Start);
2405 Locs.append(DefProto->getLoc().begin(), DefProto->getLoc().end());
2406 Record *CurRec = new Record(DefName, Locs, Records, IsAnonymous);
2408 SubClassReference Ref;
2409 Ref.RefRange = DefmPrefixRange;
2411 AddSubClass(CurRec, Ref);
2413 // Set the value for NAME. We don't resolve references to it 'til later,
2414 // though, so that uses in nested multiclass names don't get
2416 if (SetValue(CurRec, Ref.RefRange.Start, "NAME", std::vector<unsigned>(),
2418 Error(DefmPrefixRange.Start, "Could not resolve "
2419 + CurRec->getNameInitAsString() + ":NAME to '"
2420 + DefmPrefix->getAsUnquotedString() + "'");
2425 // If the DefNameString didn't resolve, we probably have a reference to
2426 // NAME and need to replace it. We need to do at least this much greedily,
2427 // otherwise nested multiclasses will end up with incorrect NAME expansions.
2428 if (!DefNameString) {
2429 RecordVal *DefNameRV = CurRec->getValue("NAME");
2430 CurRec->resolveReferencesTo(DefNameRV);
2433 if (!CurMultiClass) {
2434 // Now that we're at the top level, resolve all NAME references
2435 // in the resultant defs that weren't in the def names themselves.
2436 RecordVal *DefNameRV = CurRec->getValue("NAME");
2437 CurRec->resolveReferencesTo(DefNameRV);
2439 // Now that NAME references are resolved and we're at the top level of
2440 // any multiclass expansions, add the record to the RecordKeeper. If we are
2441 // currently in a multiclass, it means this defm appears inside a
2442 // multiclass and its name won't be fully resolvable until we see
2443 // the top-level defm. Therefore, we don't add this to the
2444 // RecordKeeper at this point. If we did we could get duplicate
2445 // defs as more than one probably refers to NAME or some other
2446 // common internal placeholder.
2448 // Ensure redefinition doesn't happen.
2449 if (Records.getDef(CurRec->getNameInitAsString())) {
2450 Error(DefmPrefixRange.Start, "def '" + CurRec->getNameInitAsString() +
2451 "' already defined, instantiating defm with subdef '" +
2452 DefProto->getNameInitAsString() + "'");
2457 Records.addDef(CurRec);
2463 bool TGParser::ResolveMulticlassDefArgs(MultiClass &MC,
2465 SMLoc DefmPrefixLoc,
2467 const std::vector<Init *> &TArgs,
2468 std::vector<Init *> &TemplateVals,
2470 // Loop over all of the template arguments, setting them to the specified
2471 // value or leaving them as the default if necessary.
2472 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
2473 // Check if a value is specified for this temp-arg.
2474 if (i < TemplateVals.size()) {
2476 if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], std::vector<unsigned>(),
2481 CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
2485 CurRec->removeValue(TArgs[i]);
2487 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
2488 return Error(SubClassLoc, "value not specified for template argument #"+
2489 utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
2490 + ") of multiclassclass '" + MC.Rec.getNameInitAsString()
2497 bool TGParser::ResolveMulticlassDef(MultiClass &MC,
2500 SMLoc DefmPrefixLoc) {
2501 // If the mdef is inside a 'let' expression, add to each def.
2502 if (ApplyLetStack(CurRec))
2503 return Error(DefmPrefixLoc, "when instantiating this defm");
2505 // Don't create a top level definition for defm inside multiclasses,
2506 // instead, only update the prototypes and bind the template args
2507 // with the new created definition.
2510 for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size();
2512 if (CurMultiClass->DefPrototypes[i]->getNameInit()
2513 == CurRec->getNameInit())
2514 return Error(DefmPrefixLoc, "defm '" + CurRec->getNameInitAsString() +
2515 "' already defined in this multiclass!");
2516 CurMultiClass->DefPrototypes.push_back(CurRec);
2518 // Copy the template arguments for the multiclass into the new def.
2519 const std::vector<Init *> &TA =
2520 CurMultiClass->Rec.getTemplateArgs();
2522 for (unsigned i = 0, e = TA.size(); i != e; ++i) {
2523 const RecordVal *RV = CurMultiClass->Rec.getValue(TA[i]);
2524 assert(RV && "Template arg doesn't exist?");
2525 CurRec->addValue(*RV);
2531 /// ParseDefm - Parse the instantiation of a multiclass.
2533 /// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
2535 bool TGParser::ParseDefm(MultiClass *CurMultiClass) {
2536 assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
2537 SMLoc DefmLoc = Lex.getLoc();
2538 Init *DefmPrefix = nullptr;
2540 if (Lex.Lex() == tgtok::Id) { // eat the defm.
2541 DefmPrefix = ParseObjectName(CurMultiClass);
2544 SMLoc DefmPrefixEndLoc = Lex.getLoc();
2545 if (Lex.getCode() != tgtok::colon)
2546 return TokError("expected ':' after defm identifier");
2548 // Keep track of the new generated record definitions.
2549 std::vector<Record*> NewRecDefs;
2551 // This record also inherits from a regular class (non-multiclass)?
2552 bool InheritFromClass = false;
2557 SMLoc SubClassLoc = Lex.getLoc();
2558 SubClassReference Ref = ParseSubClassReference(nullptr, true);
2561 if (!Ref.Rec) return true;
2563 // To instantiate a multiclass, we need to first get the multiclass, then
2564 // instantiate each def contained in the multiclass with the SubClassRef
2565 // template parameters.
2566 MultiClass *MC = MultiClasses[Ref.Rec->getName()];
2567 assert(MC && "Didn't lookup multiclass correctly?");
2568 std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
2570 // Verify that the correct number of template arguments were specified.
2571 const std::vector<Init *> &TArgs = MC->Rec.getTemplateArgs();
2572 if (TArgs.size() < TemplateVals.size())
2573 return Error(SubClassLoc,
2574 "more template args specified than multiclass expects");
2576 // Loop over all the def's in the multiclass, instantiating each one.
2577 for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
2578 Record *DefProto = MC->DefPrototypes[i];
2580 Record *CurRec = InstantiateMulticlassDef(*MC, DefProto, DefmPrefix,
2586 if (ResolveMulticlassDefArgs(*MC, CurRec, DefmLoc, SubClassLoc,
2587 TArgs, TemplateVals, true/*Delete args*/))
2588 return Error(SubClassLoc, "could not instantiate def");
2590 if (ResolveMulticlassDef(*MC, CurRec, DefProto, DefmLoc))
2591 return Error(SubClassLoc, "could not instantiate def");
2593 NewRecDefs.push_back(CurRec);
2597 if (Lex.getCode() != tgtok::comma) break;
2598 Lex.Lex(); // eat ','.
2600 if (Lex.getCode() != tgtok::Id)
2601 return TokError("expected identifier");
2603 SubClassLoc = Lex.getLoc();
2605 // A defm can inherit from regular classes (non-multiclass) as
2606 // long as they come in the end of the inheritance list.
2607 InheritFromClass = (Records.getClass(Lex.getCurStrVal()) != nullptr);
2609 if (InheritFromClass)
2612 Ref = ParseSubClassReference(nullptr, true);
2615 if (InheritFromClass) {
2616 // Process all the classes to inherit as if they were part of a
2617 // regular 'def' and inherit all record values.
2618 SubClassReference SubClass = ParseSubClassReference(nullptr, false);
2621 if (!SubClass.Rec) return true;
2623 // Get the expanded definition prototypes and teach them about
2624 // the record values the current class to inherit has
2625 for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i) {
2626 Record *CurRec = NewRecDefs[i];
2629 if (AddSubClass(CurRec, SubClass))
2632 if (ApplyLetStack(CurRec))
2636 if (Lex.getCode() != tgtok::comma) break;
2637 Lex.Lex(); // eat ','.
2638 SubClass = ParseSubClassReference(nullptr, false);
2643 for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i)
2644 // See Record::setName(). This resolve step will see any new
2645 // name for the def that might have been created when resolving
2646 // inheritance, values and arguments above.
2647 NewRecDefs[i]->resolveReferences();
2649 if (Lex.getCode() != tgtok::semi)
2650 return TokError("expected ';' at end of defm");
2657 /// Object ::= ClassInst
2658 /// Object ::= DefInst
2659 /// Object ::= MultiClassInst
2660 /// Object ::= DefMInst
2661 /// Object ::= LETCommand '{' ObjectList '}'
2662 /// Object ::= LETCommand Object
2663 bool TGParser::ParseObject(MultiClass *MC) {
2664 switch (Lex.getCode()) {
2666 return TokError("Expected class, def, defm, multiclass or let definition");
2667 case tgtok::Let: return ParseTopLevelLet(MC);
2668 case tgtok::Def: return ParseDef(MC);
2669 case tgtok::Foreach: return ParseForeach(MC);
2670 case tgtok::Defm: return ParseDefm(MC);
2671 case tgtok::Class: return ParseClass();
2672 case tgtok::MultiClass: return ParseMultiClass();
2677 /// ObjectList :== Object*
2678 bool TGParser::ParseObjectList(MultiClass *MC) {
2679 while (isObjectStart(Lex.getCode())) {
2680 if (ParseObject(MC))
2686 bool TGParser::ParseFile() {
2687 Lex.Lex(); // Prime the lexer.
2688 if (ParseObjectList()) return true;
2690 // If we have unread input at the end of the file, report it.
2691 if (Lex.getCode() == tgtok::Eof)
2694 return TokError("Unexpected input at top level");