1 //===- Record.cpp - Record implementation ---------------------------------===//
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 tablegen record classes.
12 //===----------------------------------------------------------------------===//
15 #include "llvm/System/DataTypes.h"
16 #include "llvm/Support/Format.h"
17 #include "llvm/ADT/StringExtras.h"
21 //===----------------------------------------------------------------------===//
22 // Type implementations
23 //===----------------------------------------------------------------------===//
25 void RecTy::dump() const { print(errs()); }
27 Init *BitRecTy::convertValue(BitsInit *BI) {
28 if (BI->getNumBits() != 1) return 0; // Only accept if just one bit!
32 bool BitRecTy::baseClassOf(const BitsRecTy *RHS) const {
33 return RHS->getNumBits() == 1;
36 Init *BitRecTy::convertValue(IntInit *II) {
37 int64_t Val = II->getValue();
38 if (Val != 0 && Val != 1) return 0; // Only accept 0 or 1 for a bit!
40 return new BitInit(Val != 0);
43 Init *BitRecTy::convertValue(TypedInit *VI) {
44 if (dynamic_cast<BitRecTy*>(VI->getType()))
45 return VI; // Accept variable if it is already of bit type!
49 std::string BitsRecTy::getAsString() const {
50 return "bits<" + utostr(Size) + ">";
53 Init *BitsRecTy::convertValue(UnsetInit *UI) {
54 BitsInit *Ret = new BitsInit(Size);
56 for (unsigned i = 0; i != Size; ++i)
57 Ret->setBit(i, new UnsetInit());
61 Init *BitsRecTy::convertValue(BitInit *UI) {
62 if (Size != 1) return 0; // Can only convert single bit...
63 BitsInit *Ret = new BitsInit(1);
68 // convertValue from Int initializer to bits type: Split the integer up into the
69 // appropriate bits...
71 Init *BitsRecTy::convertValue(IntInit *II) {
72 int64_t Value = II->getValue();
73 // Make sure this bitfield is large enough to hold the integer value...
75 if (Value & ~((1LL << Size)-1))
78 if ((Value >> Size) != -1 || ((Value & (1LL << (Size-1))) == 0))
82 BitsInit *Ret = new BitsInit(Size);
83 for (unsigned i = 0; i != Size; ++i)
84 Ret->setBit(i, new BitInit(Value & (1LL << i)));
89 Init *BitsRecTy::convertValue(BitsInit *BI) {
90 // If the number of bits is right, return it. Otherwise we need to expand or
92 if (BI->getNumBits() == Size) return BI;
96 Init *BitsRecTy::convertValue(TypedInit *VI) {
97 if (BitsRecTy *BRT = dynamic_cast<BitsRecTy*>(VI->getType()))
98 if (BRT->Size == Size) {
99 BitsInit *Ret = new BitsInit(Size);
100 for (unsigned i = 0; i != Size; ++i)
101 Ret->setBit(i, new VarBitInit(VI, i));
104 if (Size == 1 && dynamic_cast<BitRecTy*>(VI->getType())) {
105 BitsInit *Ret = new BitsInit(1);
113 Init *IntRecTy::convertValue(BitInit *BI) {
114 return new IntInit(BI->getValue());
117 Init *IntRecTy::convertValue(BitsInit *BI) {
119 for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
120 if (BitInit *Bit = dynamic_cast<BitInit*>(BI->getBit(i))) {
121 Result |= Bit->getValue() << i;
125 return new IntInit(Result);
128 Init *IntRecTy::convertValue(TypedInit *TI) {
129 if (TI->getType()->typeIsConvertibleTo(this))
130 return TI; // Accept variable if already of the right type!
134 Init *StringRecTy::convertValue(UnOpInit *BO) {
135 if (BO->getOpcode() == UnOpInit::CAST) {
136 Init *L = BO->getOperand()->convertInitializerTo(this);
137 if (L == 0) return 0;
138 if (L != BO->getOperand())
139 return new UnOpInit(UnOpInit::CAST, L, new StringRecTy);
143 return convertValue((TypedInit*)BO);
146 Init *StringRecTy::convertValue(BinOpInit *BO) {
147 if (BO->getOpcode() == BinOpInit::STRCONCAT) {
148 Init *L = BO->getLHS()->convertInitializerTo(this);
149 Init *R = BO->getRHS()->convertInitializerTo(this);
150 if (L == 0 || R == 0) return 0;
151 if (L != BO->getLHS() || R != BO->getRHS())
152 return new BinOpInit(BinOpInit::STRCONCAT, L, R, new StringRecTy);
155 if (BO->getOpcode() == BinOpInit::NAMECONCAT) {
156 if (BO->getType()->getAsString() == getAsString()) {
157 Init *L = BO->getLHS()->convertInitializerTo(this);
158 Init *R = BO->getRHS()->convertInitializerTo(this);
159 if (L == 0 || R == 0) return 0;
160 if (L != BO->getLHS() || R != BO->getRHS())
161 return new BinOpInit(BinOpInit::NAMECONCAT, L, R, new StringRecTy);
166 return convertValue((TypedInit*)BO);
170 Init *StringRecTy::convertValue(TypedInit *TI) {
171 if (dynamic_cast<StringRecTy*>(TI->getType()))
172 return TI; // Accept variable if already of the right type!
176 std::string ListRecTy::getAsString() const {
177 return "list<" + Ty->getAsString() + ">";
180 Init *ListRecTy::convertValue(ListInit *LI) {
181 std::vector<Init*> Elements;
183 // Verify that all of the elements of the list are subclasses of the
184 // appropriate class!
185 for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
186 if (Init *CI = LI->getElement(i)->convertInitializerTo(Ty))
187 Elements.push_back(CI);
191 ListRecTy *LType = dynamic_cast<ListRecTy*>(LI->getType());
196 return new ListInit(Elements, new ListRecTy(Ty));
199 Init *ListRecTy::convertValue(TypedInit *TI) {
200 // Ensure that TI is compatible with our class.
201 if (ListRecTy *LRT = dynamic_cast<ListRecTy*>(TI->getType()))
202 if (LRT->getElementType()->typeIsConvertibleTo(getElementType()))
207 Init *CodeRecTy::convertValue(TypedInit *TI) {
208 if (TI->getType()->typeIsConvertibleTo(this))
213 Init *DagRecTy::convertValue(TypedInit *TI) {
214 if (TI->getType()->typeIsConvertibleTo(this))
219 Init *DagRecTy::convertValue(UnOpInit *BO) {
220 if (BO->getOpcode() == UnOpInit::CAST) {
221 Init *L = BO->getOperand()->convertInitializerTo(this);
222 if (L == 0) return 0;
223 if (L != BO->getOperand())
224 return new UnOpInit(UnOpInit::CAST, L, new DagRecTy);
230 Init *DagRecTy::convertValue(BinOpInit *BO) {
231 if (BO->getOpcode() == BinOpInit::CONCAT) {
232 Init *L = BO->getLHS()->convertInitializerTo(this);
233 Init *R = BO->getRHS()->convertInitializerTo(this);
234 if (L == 0 || R == 0) return 0;
235 if (L != BO->getLHS() || R != BO->getRHS())
236 return new BinOpInit(BinOpInit::CONCAT, L, R, new DagRecTy);
239 if (BO->getOpcode() == BinOpInit::NAMECONCAT) {
240 if (BO->getType()->getAsString() == getAsString()) {
241 Init *L = BO->getLHS()->convertInitializerTo(this);
242 Init *R = BO->getRHS()->convertInitializerTo(this);
243 if (L == 0 || R == 0) return 0;
244 if (L != BO->getLHS() || R != BO->getRHS())
245 return new BinOpInit(BinOpInit::CONCAT, L, R, new DagRecTy);
252 std::string RecordRecTy::getAsString() const {
253 return Rec->getName();
256 Init *RecordRecTy::convertValue(DefInit *DI) {
257 // Ensure that DI is a subclass of Rec.
258 if (!DI->getDef()->isSubClassOf(Rec))
263 Init *RecordRecTy::convertValue(TypedInit *TI) {
264 // Ensure that TI is compatible with Rec.
265 if (RecordRecTy *RRT = dynamic_cast<RecordRecTy*>(TI->getType()))
266 if (RRT->getRecord()->isSubClassOf(getRecord()) ||
267 RRT->getRecord() == getRecord())
272 bool RecordRecTy::baseClassOf(const RecordRecTy *RHS) const {
273 return Rec == RHS->getRecord() || RHS->getRecord()->isSubClassOf(Rec);
277 /// resolveTypes - Find a common type that T1 and T2 convert to.
278 /// Return 0 if no such type exists.
280 RecTy *llvm::resolveTypes(RecTy *T1, RecTy *T2) {
281 if (!T1->typeIsConvertibleTo(T2)) {
282 if (!T2->typeIsConvertibleTo(T1)) {
283 // If one is a Record type, check superclasses
284 RecordRecTy *RecTy1 = dynamic_cast<RecordRecTy*>(T1);
286 // See if T2 inherits from a type T1 also inherits from
287 const std::vector<Record *> &T1SuperClasses =
288 RecTy1->getRecord()->getSuperClasses();
289 for(std::vector<Record *>::const_iterator i = T1SuperClasses.begin(),
290 iend = T1SuperClasses.end();
293 RecordRecTy *SuperRecTy1 = new RecordRecTy(*i);
294 RecTy *NewType1 = resolveTypes(SuperRecTy1, T2);
296 if (NewType1 != SuperRecTy1) {
303 RecordRecTy *RecTy2 = dynamic_cast<RecordRecTy*>(T2);
305 // See if T1 inherits from a type T2 also inherits from
306 const std::vector<Record *> &T2SuperClasses =
307 RecTy2->getRecord()->getSuperClasses();
308 for (std::vector<Record *>::const_iterator i = T2SuperClasses.begin(),
309 iend = T2SuperClasses.end();
312 RecordRecTy *SuperRecTy2 = new RecordRecTy(*i);
313 RecTy *NewType2 = resolveTypes(T1, SuperRecTy2);
315 if (NewType2 != SuperRecTy2) {
330 //===----------------------------------------------------------------------===//
331 // Initializer implementations
332 //===----------------------------------------------------------------------===//
334 void Init::dump() const { return print(errs()); }
336 Init *BitsInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
337 BitsInit *BI = new BitsInit(Bits.size());
338 for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
339 if (Bits[i] >= getNumBits()) {
343 BI->setBit(i, getBit(Bits[i]));
348 std::string BitsInit::getAsString() const {
349 std::string Result = "{ ";
350 for (unsigned i = 0, e = getNumBits(); i != e; ++i) {
351 if (i) Result += ", ";
352 if (Init *Bit = getBit(e-i-1))
353 Result += Bit->getAsString();
357 return Result + " }";
360 // resolveReferences - If there are any field references that refer to fields
361 // that have been filled in, we can propagate the values now.
363 Init *BitsInit::resolveReferences(Record &R, const RecordVal *RV) {
364 bool Changed = false;
365 BitsInit *New = new BitsInit(getNumBits());
367 for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
369 Init *CurBit = getBit(i);
373 CurBit = CurBit->resolveReferences(R, RV);
374 Changed |= B != CurBit;
375 } while (B != CurBit);
376 New->setBit(i, CurBit);
385 std::string IntInit::getAsString() const {
386 return itostr(Value);
389 Init *IntInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
390 BitsInit *BI = new BitsInit(Bits.size());
392 for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
397 BI->setBit(i, new BitInit(Value & (INT64_C(1) << Bits[i])));
402 Init *ListInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
403 std::vector<Init*> Vals;
404 for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
405 if (Elements[i] >= getSize())
407 Vals.push_back(getElement(Elements[i]));
409 return new ListInit(Vals, getType());
412 Record *ListInit::getElementAsRecord(unsigned i) const {
413 assert(i < Values.size() && "List element index out of range!");
414 DefInit *DI = dynamic_cast<DefInit*>(Values[i]);
415 if (DI == 0) throw "Expected record in list!";
419 Init *ListInit::resolveReferences(Record &R, const RecordVal *RV) {
420 std::vector<Init*> Resolved;
421 Resolved.reserve(getSize());
422 bool Changed = false;
424 for (unsigned i = 0, e = getSize(); i != e; ++i) {
426 Init *CurElt = getElement(i);
430 CurElt = CurElt->resolveReferences(R, RV);
431 Changed |= E != CurElt;
432 } while (E != CurElt);
433 Resolved.push_back(E);
437 return new ListInit(Resolved, getType());
441 Init *ListInit::resolveListElementReference(Record &R, const RecordVal *IRV,
443 if (Elt >= getSize())
444 return 0; // Out of range reference.
445 Init *E = getElement(Elt);
446 // If the element is set to some value, or if we are resolving a reference
447 // to a specific variable and that variable is explicitly unset, then
448 // replace the VarListElementInit with it.
449 if (IRV || !dynamic_cast<UnsetInit*>(E))
454 std::string ListInit::getAsString() const {
455 std::string Result = "[";
456 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
457 if (i) Result += ", ";
458 Result += Values[i]->getAsString();
463 Init *OpInit::resolveBitReference(Record &R, const RecordVal *IRV,
465 Init *Folded = Fold(&R, 0);
467 if (Folded != this) {
468 TypedInit *Typed = dynamic_cast<TypedInit *>(Folded);
470 return Typed->resolveBitReference(R, IRV, Bit);
477 Init *OpInit::resolveListElementReference(Record &R, const RecordVal *IRV,
479 Init *Folded = Fold(&R, 0);
481 if (Folded != this) {
482 TypedInit *Typed = dynamic_cast<TypedInit *>(Folded);
484 return Typed->resolveListElementReference(R, IRV, Elt);
491 Init *UnOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
492 switch (getOpcode()) {
493 default: assert(0 && "Unknown unop");
495 if (getType()->getAsString() == "string") {
496 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
501 DefInit *LHSd = dynamic_cast<DefInit*>(LHS);
503 return new StringInit(LHSd->getDef()->getName());
506 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
508 std::string Name = LHSs->getValue();
510 // From TGParser::ParseIDValue
512 if (const RecordVal *RV = CurRec->getValue(Name)) {
513 if (RV->getType() != getType()) {
514 throw "type mismatch in nameconcat";
516 return new VarInit(Name, RV->getType());
519 std::string TemplateArgName = CurRec->getName()+":"+Name;
520 if (CurRec->isTemplateArg(TemplateArgName)) {
521 const RecordVal *RV = CurRec->getValue(TemplateArgName);
522 assert(RV && "Template arg doesn't exist??");
524 if (RV->getType() != getType()) {
525 throw "type mismatch in nameconcat";
528 return new VarInit(TemplateArgName, RV->getType());
533 std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
534 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
535 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
536 assert(RV && "Template arg doesn't exist??");
538 if (RV->getType() != getType()) {
539 throw "type mismatch in nameconcat";
542 return new VarInit(MCName, RV->getType());
546 if (Record *D = Records.getDef(Name))
547 return new DefInit(D);
549 errs() << "Variable not defined: '" + Name + "'\n";
550 assert(0 && "Variable not found");
557 ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
559 if (LHSl->getSize() == 0) {
560 assert(0 && "Empty list in car");
563 return LHSl->getElement(0);
568 ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
570 if (LHSl->getSize() == 0) {
571 assert(0 && "Empty list in cdr");
574 ListInit *Result = new ListInit(LHSl->begin()+1, LHSl->end(),
581 ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
583 if (LHSl->getSize() == 0) {
584 return new IntInit(1);
586 return new IntInit(0);
589 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
591 if (LHSs->getValue().empty()) {
592 return new IntInit(1);
594 return new IntInit(0);
604 Init *UnOpInit::resolveReferences(Record &R, const RecordVal *RV) {
605 Init *lhs = LHS->resolveReferences(R, RV);
608 return (new UnOpInit(getOpcode(), lhs, getType()))->Fold(&R, 0);
612 std::string UnOpInit::getAsString() const {
615 case CAST: Result = "!cast<" + getType()->getAsString() + ">"; break;
616 case CAR: Result = "!car"; break;
617 case CDR: Result = "!cdr"; break;
618 case LNULL: Result = "!null"; break;
620 return Result + "(" + LHS->getAsString() + ")";
623 RecTy *UnOpInit::getFieldType(const std::string &FieldName) const {
624 switch (getOpcode()) {
625 default: assert(0 && "Unknown unop");
627 RecordRecTy *RecordType = dynamic_cast<RecordRecTy *>(getType());
629 RecordVal *Field = RecordType->getRecord()->getValue(FieldName);
631 return Field->getType();
640 Init *BinOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
641 switch (getOpcode()) {
642 default: assert(0 && "Unknown binop");
644 DagInit *LHSs = dynamic_cast<DagInit*>(LHS);
645 DagInit *RHSs = dynamic_cast<DagInit*>(RHS);
647 DefInit *LOp = dynamic_cast<DefInit*>(LHSs->getOperator());
648 DefInit *ROp = dynamic_cast<DefInit*>(RHSs->getOperator());
649 if (LOp == 0 || ROp == 0 || LOp->getDef() != ROp->getDef())
650 throw "Concated Dag operators do not match!";
651 std::vector<Init*> Args;
652 std::vector<std::string> ArgNames;
653 for (unsigned i = 0, e = LHSs->getNumArgs(); i != e; ++i) {
654 Args.push_back(LHSs->getArg(i));
655 ArgNames.push_back(LHSs->getArgName(i));
657 for (unsigned i = 0, e = RHSs->getNumArgs(); i != e; ++i) {
658 Args.push_back(RHSs->getArg(i));
659 ArgNames.push_back(RHSs->getArgName(i));
661 return new DagInit(LHSs->getOperator(), "", Args, ArgNames);
666 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
667 StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
669 return new StringInit(LHSs->getValue() + RHSs->getValue());
673 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
674 StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
676 std::string Name(LHSs->getValue() + RHSs->getValue());
678 // From TGParser::ParseIDValue
680 if (const RecordVal *RV = CurRec->getValue(Name)) {
681 if (RV->getType() != getType()) {
682 throw "type mismatch in nameconcat";
684 return new VarInit(Name, RV->getType());
687 std::string TemplateArgName = CurRec->getName()+":"+Name;
688 if (CurRec->isTemplateArg(TemplateArgName)) {
689 const RecordVal *RV = CurRec->getValue(TemplateArgName);
690 assert(RV && "Template arg doesn't exist??");
692 if (RV->getType() != getType()) {
693 throw "type mismatch in nameconcat";
696 return new VarInit(TemplateArgName, RV->getType());
701 std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
702 if (CurMultiClass->Rec.isTemplateArg(MCName)) {
703 const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
704 assert(RV && "Template arg doesn't exist??");
706 if (RV->getType() != getType()) {
707 throw "type mismatch in nameconcat";
710 return new VarInit(MCName, RV->getType());
714 if (Record *D = Records.getDef(Name))
715 return new DefInit(D);
717 errs() << "Variable not defined in !nameconcat: '" + Name + "'\n";
718 assert(0 && "Variable not found in !nameconcat");
724 // try to fold eq comparison for 'bit' and 'int', otherwise fallback
725 // to string objects.
727 dynamic_cast<IntInit*>(LHS->convertInitializerTo(new IntRecTy()));
729 dynamic_cast<IntInit*>(RHS->convertInitializerTo(new IntRecTy()));
732 return new IntInit(L->getValue() == R->getValue());
734 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
735 StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
737 // Make sure we've resolved
739 return new IntInit(LHSs->getValue() == RHSs->getValue());
746 IntInit *LHSi = dynamic_cast<IntInit*>(LHS);
747 IntInit *RHSi = dynamic_cast<IntInit*>(RHS);
749 int64_t LHSv = LHSi->getValue(), RHSv = RHSi->getValue();
751 switch (getOpcode()) {
752 default: assert(0 && "Bad opcode!");
753 case SHL: Result = LHSv << RHSv; break;
754 case SRA: Result = LHSv >> RHSv; break;
755 case SRL: Result = (uint64_t)LHSv >> (uint64_t)RHSv; break;
757 return new IntInit(Result);
765 Init *BinOpInit::resolveReferences(Record &R, const RecordVal *RV) {
766 Init *lhs = LHS->resolveReferences(R, RV);
767 Init *rhs = RHS->resolveReferences(R, RV);
769 if (LHS != lhs || RHS != rhs)
770 return (new BinOpInit(getOpcode(), lhs, rhs, getType()))->Fold(&R, 0);
774 std::string BinOpInit::getAsString() const {
777 case CONCAT: Result = "!con"; break;
778 case SHL: Result = "!shl"; break;
779 case SRA: Result = "!sra"; break;
780 case SRL: Result = "!srl"; break;
781 case EQ: Result = "!eq"; break;
782 case STRCONCAT: Result = "!strconcat"; break;
784 Result = "!nameconcat<" + getType()->getAsString() + ">"; break;
786 return Result + "(" + LHS->getAsString() + ", " + RHS->getAsString() + ")";
789 static Init *ForeachHelper(Init *LHS, Init *MHS, Init *RHS, RecTy *Type,
790 Record *CurRec, MultiClass *CurMultiClass);
792 static Init *EvaluateOperation(OpInit *RHSo, Init *LHS, Init *Arg,
793 RecTy *Type, Record *CurRec,
794 MultiClass *CurMultiClass) {
795 std::vector<Init *> NewOperands;
797 TypedInit *TArg = dynamic_cast<TypedInit*>(Arg);
799 // If this is a dag, recurse
800 if (TArg && TArg->getType()->getAsString() == "dag") {
801 Init *Result = ForeachHelper(LHS, Arg, RHSo, Type,
802 CurRec, CurMultiClass);
810 for (int i = 0; i < RHSo->getNumOperands(); ++i) {
811 OpInit *RHSoo = dynamic_cast<OpInit*>(RHSo->getOperand(i));
814 Init *Result = EvaluateOperation(RHSoo, LHS, Arg,
815 Type, CurRec, CurMultiClass);
817 NewOperands.push_back(Result);
819 NewOperands.push_back(Arg);
821 } else if (LHS->getAsString() == RHSo->getOperand(i)->getAsString()) {
822 NewOperands.push_back(Arg);
824 NewOperands.push_back(RHSo->getOperand(i));
828 // Now run the operator and use its result as the new leaf
829 OpInit *NewOp = RHSo->clone(NewOperands);
830 Init *NewVal = NewOp->Fold(CurRec, CurMultiClass);
831 if (NewVal != NewOp) {
838 static Init *ForeachHelper(Init *LHS, Init *MHS, Init *RHS, RecTy *Type,
839 Record *CurRec, MultiClass *CurMultiClass) {
840 DagInit *MHSd = dynamic_cast<DagInit*>(MHS);
841 ListInit *MHSl = dynamic_cast<ListInit*>(MHS);
843 DagRecTy *DagType = dynamic_cast<DagRecTy*>(Type);
844 ListRecTy *ListType = dynamic_cast<ListRecTy*>(Type);
846 OpInit *RHSo = dynamic_cast<OpInit*>(RHS);
849 errs() << "!foreach requires an operator\n";
850 assert(0 && "No operator for !foreach");
853 TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
856 errs() << "!foreach requires typed variable\n";
857 assert(0 && "No typed variable for !foreach");
860 if ((MHSd && DagType) || (MHSl && ListType)) {
862 Init *Val = MHSd->getOperator();
863 Init *Result = EvaluateOperation(RHSo, LHS, Val,
864 Type, CurRec, CurMultiClass);
869 std::vector<std::pair<Init *, std::string> > args;
870 for (unsigned int i = 0; i < MHSd->getNumArgs(); ++i) {
873 Arg = MHSd->getArg(i);
874 ArgName = MHSd->getArgName(i);
877 Init *Result = EvaluateOperation(RHSo, LHS, Arg, Type,
878 CurRec, CurMultiClass);
883 // TODO: Process arg names
884 args.push_back(std::make_pair(Arg, ArgName));
887 return new DagInit(Val, "", args);
890 std::vector<Init *> NewOperands;
891 std::vector<Init *> NewList(MHSl->begin(), MHSl->end());
893 for (ListInit::iterator li = NewList.begin(),
894 liend = NewList.end();
899 for(int i = 0; i < RHSo->getNumOperands(); ++i) {
900 // First, replace the foreach variable with the list item
901 if (LHS->getAsString() == RHSo->getOperand(i)->getAsString()) {
902 NewOperands.push_back(Item);
904 NewOperands.push_back(RHSo->getOperand(i));
908 // Now run the operator and use its result as the new list item
909 OpInit *NewOp = RHSo->clone(NewOperands);
910 Init *NewItem = NewOp->Fold(CurRec, CurMultiClass);
911 if (NewItem != NewOp) {
916 return new ListInit(NewList, MHSl->getType());
922 Init *TernOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
923 switch (getOpcode()) {
924 default: assert(0 && "Unknown binop");
926 DefInit *LHSd = dynamic_cast<DefInit*>(LHS);
927 VarInit *LHSv = dynamic_cast<VarInit*>(LHS);
928 StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
930 DefInit *MHSd = dynamic_cast<DefInit*>(MHS);
931 VarInit *MHSv = dynamic_cast<VarInit*>(MHS);
932 StringInit *MHSs = dynamic_cast<StringInit*>(MHS);
934 DefInit *RHSd = dynamic_cast<DefInit*>(RHS);
935 VarInit *RHSv = dynamic_cast<VarInit*>(RHS);
936 StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
938 if ((LHSd && MHSd && RHSd)
939 || (LHSv && MHSv && RHSv)
940 || (LHSs && MHSs && RHSs)) {
942 Record *Val = RHSd->getDef();
943 if (LHSd->getAsString() == RHSd->getAsString()) {
944 Val = MHSd->getDef();
946 return new DefInit(Val);
949 std::string Val = RHSv->getName();
950 if (LHSv->getAsString() == RHSv->getAsString()) {
951 Val = MHSv->getName();
953 return new VarInit(Val, getType());
956 std::string Val = RHSs->getValue();
958 std::string::size_type found;
959 std::string::size_type idx = 0;
961 found = Val.find(LHSs->getValue(), idx);
962 if (found != std::string::npos) {
963 Val.replace(found, LHSs->getValue().size(), MHSs->getValue());
965 idx = found + MHSs->getValue().size();
966 } while (found != std::string::npos);
968 return new StringInit(Val);
975 Init *Result = ForeachHelper(LHS, MHS, RHS, getType(),
976 CurRec, CurMultiClass);
985 dynamic_cast<IntInit*>(LHS->convertInitializerTo(new IntRecTy()));
987 if (LHSi->getValue()) {
1000 Init *TernOpInit::resolveReferences(Record &R, const RecordVal *RV) {
1001 Init *lhs = LHS->resolveReferences(R, RV);
1003 if (Opc == IF && lhs != LHS) {
1005 dynamic_cast<IntInit*>(LHS->convertInitializerTo(new IntRecTy()));
1008 if (Value->getValue()) {
1009 Init *mhs = MHS->resolveReferences(R, RV);
1010 return (new TernOpInit(getOpcode(), lhs, mhs,
1011 RHS, getType()))->Fold(&R, 0);
1013 Init *rhs = RHS->resolveReferences(R, RV);
1014 return (new TernOpInit(getOpcode(), lhs, MHS,
1015 rhs, getType()))->Fold(&R, 0);
1020 Init *mhs = MHS->resolveReferences(R, RV);
1021 Init *rhs = RHS->resolveReferences(R, RV);
1023 if (LHS != lhs || MHS != mhs || RHS != rhs)
1024 return (new TernOpInit(getOpcode(), lhs, mhs, rhs, getType()))->Fold(&R, 0);
1028 std::string TernOpInit::getAsString() const {
1031 case SUBST: Result = "!subst"; break;
1032 case FOREACH: Result = "!foreach"; break;
1033 case IF: Result = "!if"; break;
1035 return Result + "(" + LHS->getAsString() + ", " + MHS->getAsString() + ", "
1036 + RHS->getAsString() + ")";
1039 Init *TypedInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
1040 BitsRecTy *T = dynamic_cast<BitsRecTy*>(getType());
1041 if (T == 0) return 0; // Cannot subscript a non-bits variable...
1042 unsigned NumBits = T->getNumBits();
1044 BitsInit *BI = new BitsInit(Bits.size());
1045 for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
1046 if (Bits[i] >= NumBits) {
1050 BI->setBit(i, new VarBitInit(this, Bits[i]));
1055 Init *TypedInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
1056 ListRecTy *T = dynamic_cast<ListRecTy*>(getType());
1057 if (T == 0) return 0; // Cannot subscript a non-list variable...
1059 if (Elements.size() == 1)
1060 return new VarListElementInit(this, Elements[0]);
1062 std::vector<Init*> ListInits;
1063 ListInits.reserve(Elements.size());
1064 for (unsigned i = 0, e = Elements.size(); i != e; ++i)
1065 ListInits.push_back(new VarListElementInit(this, Elements[i]));
1066 return new ListInit(ListInits, T);
1070 Init *VarInit::resolveBitReference(Record &R, const RecordVal *IRV,
1072 if (R.isTemplateArg(getName())) return 0;
1073 if (IRV && IRV->getName() != getName()) return 0;
1075 RecordVal *RV = R.getValue(getName());
1076 assert(RV && "Reference to a non-existent variable?");
1077 assert(dynamic_cast<BitsInit*>(RV->getValue()));
1078 BitsInit *BI = (BitsInit*)RV->getValue();
1080 assert(Bit < BI->getNumBits() && "Bit reference out of range!");
1081 Init *B = BI->getBit(Bit);
1083 // If the bit is set to some value, or if we are resolving a reference to a
1084 // specific variable and that variable is explicitly unset, then replace the
1085 // VarBitInit with it.
1086 if (IRV || !dynamic_cast<UnsetInit*>(B))
1091 Init *VarInit::resolveListElementReference(Record &R, const RecordVal *IRV,
1093 if (R.isTemplateArg(getName())) return 0;
1094 if (IRV && IRV->getName() != getName()) return 0;
1096 RecordVal *RV = R.getValue(getName());
1097 assert(RV && "Reference to a non-existent variable?");
1098 ListInit *LI = dynamic_cast<ListInit*>(RV->getValue());
1100 VarInit *VI = dynamic_cast<VarInit*>(RV->getValue());
1101 assert(VI && "Invalid list element!");
1102 return new VarListElementInit(VI, Elt);
1105 if (Elt >= LI->getSize())
1106 return 0; // Out of range reference.
1107 Init *E = LI->getElement(Elt);
1108 // If the element is set to some value, or if we are resolving a reference
1109 // to a specific variable and that variable is explicitly unset, then
1110 // replace the VarListElementInit with it.
1111 if (IRV || !dynamic_cast<UnsetInit*>(E))
1117 RecTy *VarInit::getFieldType(const std::string &FieldName) const {
1118 if (RecordRecTy *RTy = dynamic_cast<RecordRecTy*>(getType()))
1119 if (const RecordVal *RV = RTy->getRecord()->getValue(FieldName))
1120 return RV->getType();
1124 Init *VarInit::getFieldInit(Record &R, const RecordVal *RV,
1125 const std::string &FieldName) const {
1126 if (dynamic_cast<RecordRecTy*>(getType()))
1127 if (const RecordVal *Val = R.getValue(VarName)) {
1128 if (RV != Val && (RV || dynamic_cast<UnsetInit*>(Val->getValue())))
1130 Init *TheInit = Val->getValue();
1131 assert(TheInit != this && "Infinite loop detected!");
1132 if (Init *I = TheInit->getFieldInit(R, RV, FieldName))
1140 /// resolveReferences - This method is used by classes that refer to other
1141 /// variables which may not be defined at the time the expression is formed.
1142 /// If a value is set for the variable later, this method will be called on
1143 /// users of the value to allow the value to propagate out.
1145 Init *VarInit::resolveReferences(Record &R, const RecordVal *RV) {
1146 if (RecordVal *Val = R.getValue(VarName))
1147 if (RV == Val || (RV == 0 && !dynamic_cast<UnsetInit*>(Val->getValue())))
1148 return Val->getValue();
1152 std::string VarBitInit::getAsString() const {
1153 return TI->getAsString() + "{" + utostr(Bit) + "}";
1156 Init *VarBitInit::resolveReferences(Record &R, const RecordVal *RV) {
1157 if (Init *I = getVariable()->resolveBitReference(R, RV, getBitNum()))
1162 std::string VarListElementInit::getAsString() const {
1163 return TI->getAsString() + "[" + utostr(Element) + "]";
1166 Init *VarListElementInit::resolveReferences(Record &R, const RecordVal *RV) {
1167 if (Init *I = getVariable()->resolveListElementReference(R, RV,
1173 Init *VarListElementInit::resolveBitReference(Record &R, const RecordVal *RV,
1175 // FIXME: This should be implemented, to support references like:
1176 // bit B = AA[0]{1};
1180 Init *VarListElementInit::
1181 resolveListElementReference(Record &R, const RecordVal *RV, unsigned Elt) {
1182 // FIXME: This should be implemented, to support references like:
1183 // int B = AA[0][1];
1187 RecTy *DefInit::getFieldType(const std::string &FieldName) const {
1188 if (const RecordVal *RV = Def->getValue(FieldName))
1189 return RV->getType();
1193 Init *DefInit::getFieldInit(Record &R, const RecordVal *RV,
1194 const std::string &FieldName) const {
1195 return Def->getValue(FieldName)->getValue();
1199 std::string DefInit::getAsString() const {
1200 return Def->getName();
1203 Init *FieldInit::resolveBitReference(Record &R, const RecordVal *RV,
1205 if (Init *BitsVal = Rec->getFieldInit(R, RV, FieldName))
1206 if (BitsInit *BI = dynamic_cast<BitsInit*>(BitsVal)) {
1207 assert(Bit < BI->getNumBits() && "Bit reference out of range!");
1208 Init *B = BI->getBit(Bit);
1210 if (dynamic_cast<BitInit*>(B)) // If the bit is set...
1211 return B; // Replace the VarBitInit with it.
1216 Init *FieldInit::resolveListElementReference(Record &R, const RecordVal *RV,
1218 if (Init *ListVal = Rec->getFieldInit(R, RV, FieldName))
1219 if (ListInit *LI = dynamic_cast<ListInit*>(ListVal)) {
1220 if (Elt >= LI->getSize()) return 0;
1221 Init *E = LI->getElement(Elt);
1223 // If the element is set to some value, or if we are resolving a
1224 // reference to a specific variable and that variable is explicitly
1225 // unset, then replace the VarListElementInit with it.
1226 if (RV || !dynamic_cast<UnsetInit*>(E))
1232 Init *FieldInit::resolveReferences(Record &R, const RecordVal *RV) {
1233 Init *NewRec = RV ? Rec->resolveReferences(R, RV) : Rec;
1235 Init *BitsVal = NewRec->getFieldInit(R, RV, FieldName);
1237 Init *BVR = BitsVal->resolveReferences(R, RV);
1238 return BVR->isComplete() ? BVR : this;
1241 if (NewRec != Rec) {
1242 return new FieldInit(NewRec, FieldName);
1247 Init *DagInit::resolveReferences(Record &R, const RecordVal *RV) {
1248 std::vector<Init*> NewArgs;
1249 for (unsigned i = 0, e = Args.size(); i != e; ++i)
1250 NewArgs.push_back(Args[i]->resolveReferences(R, RV));
1252 Init *Op = Val->resolveReferences(R, RV);
1254 if (Args != NewArgs || Op != Val)
1255 return new DagInit(Op, "", NewArgs, ArgNames);
1261 std::string DagInit::getAsString() const {
1262 std::string Result = "(" + Val->getAsString();
1263 if (!ValName.empty())
1264 Result += ":" + ValName;
1266 Result += " " + Args[0]->getAsString();
1267 if (!ArgNames[0].empty()) Result += ":$" + ArgNames[0];
1268 for (unsigned i = 1, e = Args.size(); i != e; ++i) {
1269 Result += ", " + Args[i]->getAsString();
1270 if (!ArgNames[i].empty()) Result += ":$" + ArgNames[i];
1273 return Result + ")";
1277 //===----------------------------------------------------------------------===//
1278 // Other implementations
1279 //===----------------------------------------------------------------------===//
1281 RecordVal::RecordVal(const std::string &N, RecTy *T, unsigned P)
1282 : Name(N), Ty(T), Prefix(P) {
1283 Value = Ty->convertValue(new UnsetInit());
1284 assert(Value && "Cannot create unset value for current type!");
1287 void RecordVal::dump() const { errs() << *this; }
1289 void RecordVal::print(raw_ostream &OS, bool PrintSem) const {
1290 if (getPrefix()) OS << "field ";
1291 OS << *getType() << " " << getName();
1294 OS << " = " << *getValue();
1296 if (PrintSem) OS << ";\n";
1299 unsigned Record::LastID = 0;
1301 void Record::setName(const std::string &Name) {
1302 if (Records.getDef(getName()) == this) {
1303 Records.removeDef(getName());
1305 Records.addDef(this);
1307 Records.removeClass(getName());
1309 Records.addClass(this);
1313 /// resolveReferencesTo - If anything in this record refers to RV, replace the
1314 /// reference to RV with the RHS of RV. If RV is null, we resolve all possible
1316 void Record::resolveReferencesTo(const RecordVal *RV) {
1317 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1318 if (Init *V = Values[i].getValue())
1319 Values[i].setValue(V->resolveReferences(*this, RV));
1323 void Record::dump() const { errs() << *this; }
1325 raw_ostream &llvm::operator<<(raw_ostream &OS, const Record &R) {
1328 const std::vector<std::string> &TArgs = R.getTemplateArgs();
1329 if (!TArgs.empty()) {
1331 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1333 const RecordVal *RV = R.getValue(TArgs[i]);
1334 assert(RV && "Template argument record not found??");
1335 RV->print(OS, false);
1341 const std::vector<Record*> &SC = R.getSuperClasses();
1344 for (unsigned i = 0, e = SC.size(); i != e; ++i)
1345 OS << " " << SC[i]->getName();
1349 const std::vector<RecordVal> &Vals = R.getValues();
1350 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
1351 if (Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
1353 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
1354 if (!Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
1360 /// getValueInit - Return the initializer for a value with the specified name,
1361 /// or throw an exception if the field does not exist.
1363 Init *Record::getValueInit(StringRef FieldName) const {
1364 const RecordVal *R = getValue(FieldName);
1365 if (R == 0 || R->getValue() == 0)
1366 throw "Record `" + getName() + "' does not have a field named `" +
1367 FieldName.str() + "'!\n";
1368 return R->getValue();
1372 /// getValueAsString - This method looks up the specified field and returns its
1373 /// value as a string, throwing an exception if the field does not exist or if
1374 /// the value is not a string.
1376 std::string Record::getValueAsString(StringRef FieldName) const {
1377 const RecordVal *R = getValue(FieldName);
1378 if (R == 0 || R->getValue() == 0)
1379 throw "Record `" + getName() + "' does not have a field named `" +
1380 FieldName.str() + "'!\n";
1382 if (const StringInit *SI = dynamic_cast<const StringInit*>(R->getValue()))
1383 return SI->getValue();
1384 throw "Record `" + getName() + "', field `" + FieldName.str() +
1385 "' does not have a string initializer!";
1388 /// getValueAsBitsInit - This method looks up the specified field and returns
1389 /// its value as a BitsInit, throwing an exception if the field does not exist
1390 /// or if the value is not the right type.
1392 BitsInit *Record::getValueAsBitsInit(StringRef FieldName) const {
1393 const RecordVal *R = getValue(FieldName);
1394 if (R == 0 || R->getValue() == 0)
1395 throw "Record `" + getName() + "' does not have a field named `" +
1396 FieldName.str() + "'!\n";
1398 if (BitsInit *BI = dynamic_cast<BitsInit*>(R->getValue()))
1400 throw "Record `" + getName() + "', field `" + FieldName.str() +
1401 "' does not have a BitsInit initializer!";
1404 /// getValueAsListInit - This method looks up the specified field and returns
1405 /// its value as a ListInit, throwing an exception if the field does not exist
1406 /// or if the value is not the right type.
1408 ListInit *Record::getValueAsListInit(StringRef FieldName) const {
1409 const RecordVal *R = getValue(FieldName);
1410 if (R == 0 || R->getValue() == 0)
1411 throw "Record `" + getName() + "' does not have a field named `" +
1412 FieldName.str() + "'!\n";
1414 if (ListInit *LI = dynamic_cast<ListInit*>(R->getValue()))
1416 throw "Record `" + getName() + "', field `" + FieldName.str() +
1417 "' does not have a list initializer!";
1420 /// getValueAsListOfDefs - This method looks up the specified field and returns
1421 /// its value as a vector of records, throwing an exception if the field does
1422 /// not exist or if the value is not the right type.
1424 std::vector<Record*>
1425 Record::getValueAsListOfDefs(StringRef FieldName) const {
1426 ListInit *List = getValueAsListInit(FieldName);
1427 std::vector<Record*> Defs;
1428 for (unsigned i = 0; i < List->getSize(); i++) {
1429 if (DefInit *DI = dynamic_cast<DefInit*>(List->getElement(i))) {
1430 Defs.push_back(DI->getDef());
1432 throw "Record `" + getName() + "', field `" + FieldName.str() +
1433 "' list is not entirely DefInit!";
1439 /// getValueAsInt - This method looks up the specified field and returns its
1440 /// value as an int64_t, throwing an exception if the field does not exist or if
1441 /// the value is not the right type.
1443 int64_t Record::getValueAsInt(StringRef FieldName) const {
1444 const RecordVal *R = getValue(FieldName);
1445 if (R == 0 || R->getValue() == 0)
1446 throw "Record `" + getName() + "' does not have a field named `" +
1447 FieldName.str() + "'!\n";
1449 if (IntInit *II = dynamic_cast<IntInit*>(R->getValue()))
1450 return II->getValue();
1451 throw "Record `" + getName() + "', field `" + FieldName.str() +
1452 "' does not have an int initializer!";
1455 /// getValueAsListOfInts - This method looks up the specified field and returns
1456 /// its value as a vector of integers, throwing an exception if the field does
1457 /// not exist or if the value is not the right type.
1459 std::vector<int64_t>
1460 Record::getValueAsListOfInts(StringRef FieldName) const {
1461 ListInit *List = getValueAsListInit(FieldName);
1462 std::vector<int64_t> Ints;
1463 for (unsigned i = 0; i < List->getSize(); i++) {
1464 if (IntInit *II = dynamic_cast<IntInit*>(List->getElement(i))) {
1465 Ints.push_back(II->getValue());
1467 throw "Record `" + getName() + "', field `" + FieldName.str() +
1468 "' does not have a list of ints initializer!";
1474 /// getValueAsDef - This method looks up the specified field and returns its
1475 /// value as a Record, throwing an exception if the field does not exist or if
1476 /// the value is not the right type.
1478 Record *Record::getValueAsDef(StringRef FieldName) const {
1479 const RecordVal *R = getValue(FieldName);
1480 if (R == 0 || R->getValue() == 0)
1481 throw "Record `" + getName() + "' does not have a field named `" +
1482 FieldName.str() + "'!\n";
1484 if (DefInit *DI = dynamic_cast<DefInit*>(R->getValue()))
1485 return DI->getDef();
1486 throw "Record `" + getName() + "', field `" + FieldName.str() +
1487 "' does not have a def initializer!";
1490 /// getValueAsBit - This method looks up the specified field and returns its
1491 /// value as a bit, throwing an exception if the field does not exist or if
1492 /// the value is not the right type.
1494 bool Record::getValueAsBit(StringRef FieldName) const {
1495 const RecordVal *R = getValue(FieldName);
1496 if (R == 0 || R->getValue() == 0)
1497 throw "Record `" + getName() + "' does not have a field named `" +
1498 FieldName.str() + "'!\n";
1500 if (BitInit *BI = dynamic_cast<BitInit*>(R->getValue()))
1501 return BI->getValue();
1502 throw "Record `" + getName() + "', field `" + FieldName.str() +
1503 "' does not have a bit initializer!";
1506 /// getValueAsDag - This method looks up the specified field and returns its
1507 /// value as an Dag, throwing an exception if the field does not exist or if
1508 /// the value is not the right type.
1510 DagInit *Record::getValueAsDag(StringRef FieldName) const {
1511 const RecordVal *R = getValue(FieldName);
1512 if (R == 0 || R->getValue() == 0)
1513 throw "Record `" + getName() + "' does not have a field named `" +
1514 FieldName.str() + "'!\n";
1516 if (DagInit *DI = dynamic_cast<DagInit*>(R->getValue()))
1518 throw "Record `" + getName() + "', field `" + FieldName.str() +
1519 "' does not have a dag initializer!";
1522 std::string Record::getValueAsCode(StringRef FieldName) const {
1523 const RecordVal *R = getValue(FieldName);
1524 if (R == 0 || R->getValue() == 0)
1525 throw "Record `" + getName() + "' does not have a field named `" +
1526 FieldName.str() + "'!\n";
1528 if (const CodeInit *CI = dynamic_cast<const CodeInit*>(R->getValue()))
1529 return CI->getValue();
1530 throw "Record `" + getName() + "', field `" + FieldName.str() +
1531 "' does not have a code initializer!";
1535 void MultiClass::dump() const {
1536 errs() << "Record:\n";
1539 errs() << "Defs:\n";
1540 for (RecordVector::const_iterator r = DefPrototypes.begin(),
1541 rend = DefPrototypes.end();
1549 void RecordKeeper::dump() const { errs() << *this; }
1551 raw_ostream &llvm::operator<<(raw_ostream &OS, const RecordKeeper &RK) {
1552 OS << "------------- Classes -----------------\n";
1553 const std::map<std::string, Record*> &Classes = RK.getClasses();
1554 for (std::map<std::string, Record*>::const_iterator I = Classes.begin(),
1555 E = Classes.end(); I != E; ++I)
1556 OS << "class " << *I->second;
1558 OS << "------------- Defs -----------------\n";
1559 const std::map<std::string, Record*> &Defs = RK.getDefs();
1560 for (std::map<std::string, Record*>::const_iterator I = Defs.begin(),
1561 E = Defs.end(); I != E; ++I)
1562 OS << "def " << *I->second;
1567 /// getAllDerivedDefinitions - This method returns all concrete definitions
1568 /// that derive from the specified class name. If a class with the specified
1569 /// name does not exist, an error is printed and true is returned.
1570 std::vector<Record*>
1571 RecordKeeper::getAllDerivedDefinitions(const std::string &ClassName) const {
1572 Record *Class = Records.getClass(ClassName);
1574 throw "ERROR: Couldn't find the `" + ClassName + "' class!\n";
1576 std::vector<Record*> Defs;
1577 for (std::map<std::string, Record*>::const_iterator I = getDefs().begin(),
1578 E = getDefs().end(); I != E; ++I)
1579 if (I->second->isSubClassOf(Class))
1580 Defs.push_back(I->second);