2668 lines
84 KiB
C++
2668 lines
84 KiB
C++
//===- TGParser.cpp - Parser for TableGen Files ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implement the Parser for TableGen.
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//
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//===----------------------------------------------------------------------===//
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#include "TGParser.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/TableGen/Record.h"
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#include <algorithm>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Support Code for the Semantic Actions.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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struct SubClassReference {
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SMRange RefRange;
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Record *Rec;
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std::vector<Init*> TemplateArgs;
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SubClassReference() : Rec(nullptr) {}
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bool isInvalid() const { return Rec == nullptr; }
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};
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struct SubMultiClassReference {
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SMRange RefRange;
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MultiClass *MC;
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std::vector<Init*> TemplateArgs;
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SubMultiClassReference() : MC(nullptr) {}
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bool isInvalid() const { return MC == nullptr; }
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void dump() const;
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};
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LLVM_DUMP_METHOD void SubMultiClassReference::dump() const {
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errs() << "Multiclass:\n";
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MC->dump();
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errs() << "Template args:\n";
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for (Init *TA : TemplateArgs)
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TA->dump();
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}
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} // end namespace llvm
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bool TGParser::AddValue(Record *CurRec, SMLoc Loc, const RecordVal &RV) {
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if (!CurRec)
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CurRec = &CurMultiClass->Rec;
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if (RecordVal *ERV = CurRec->getValue(RV.getNameInit())) {
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// The value already exists in the class, treat this as a set.
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if (ERV->setValue(RV.getValue()))
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return Error(Loc, "New definition of '" + RV.getName() + "' of type '" +
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RV.getType()->getAsString() + "' is incompatible with " +
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"previous definition of type '" +
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ERV->getType()->getAsString() + "'");
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} else {
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CurRec->addValue(RV);
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}
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return false;
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}
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/// SetValue -
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/// Return true on error, false on success.
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bool TGParser::SetValue(Record *CurRec, SMLoc Loc, Init *ValName,
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ArrayRef<unsigned> BitList, Init *V,
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bool AllowSelfAssignment) {
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if (!V) return false;
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if (!CurRec) CurRec = &CurMultiClass->Rec;
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RecordVal *RV = CurRec->getValue(ValName);
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if (!RV)
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return Error(Loc, "Value '" + ValName->getAsUnquotedString() +
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"' unknown!");
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// Do not allow assignments like 'X = X'. This will just cause infinite loops
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// in the resolution machinery.
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if (BitList.empty())
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if (VarInit *VI = dyn_cast<VarInit>(V))
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if (VI->getNameInit() == ValName && !AllowSelfAssignment)
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return true;
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// If we are assigning to a subset of the bits in the value... then we must be
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// assigning to a field of BitsRecTy, which must have a BitsInit
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// initializer.
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//
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if (!BitList.empty()) {
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BitsInit *CurVal = dyn_cast<BitsInit>(RV->getValue());
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if (!CurVal)
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return Error(Loc, "Value '" + ValName->getAsUnquotedString() +
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"' is not a bits type");
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// Convert the incoming value to a bits type of the appropriate size...
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Init *BI = V->convertInitializerTo(BitsRecTy::get(BitList.size()));
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if (!BI)
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return Error(Loc, "Initializer is not compatible with bit range");
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// We should have a BitsInit type now.
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BitsInit *BInit = cast<BitsInit>(BI);
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SmallVector<Init *, 16> NewBits(CurVal->getNumBits());
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// Loop over bits, assigning values as appropriate.
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for (unsigned i = 0, e = BitList.size(); i != e; ++i) {
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unsigned Bit = BitList[i];
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if (NewBits[Bit])
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return Error(Loc, "Cannot set bit #" + Twine(Bit) + " of value '" +
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ValName->getAsUnquotedString() + "' more than once");
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NewBits[Bit] = BInit->getBit(i);
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}
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for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
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if (!NewBits[i])
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NewBits[i] = CurVal->getBit(i);
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V = BitsInit::get(NewBits);
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}
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if (RV->setValue(V)) {
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std::string InitType = "";
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if (BitsInit *BI = dyn_cast<BitsInit>(V))
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InitType = (Twine("' of type bit initializer with length ") +
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Twine(BI->getNumBits())).str();
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return Error(Loc, "Value '" + ValName->getAsUnquotedString() +
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"' of type '" + RV->getType()->getAsString() +
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"' is incompatible with initializer '" + V->getAsString() +
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InitType + "'");
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}
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return false;
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}
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/// AddSubClass - Add SubClass as a subclass to CurRec, resolving its template
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/// args as SubClass's template arguments.
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bool TGParser::AddSubClass(Record *CurRec, SubClassReference &SubClass) {
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Record *SC = SubClass.Rec;
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// Add all of the values in the subclass into the current class.
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for (const RecordVal &Val : SC->getValues())
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if (AddValue(CurRec, SubClass.RefRange.Start, Val))
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return true;
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ArrayRef<Init *> TArgs = SC->getTemplateArgs();
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// Ensure that an appropriate number of template arguments are specified.
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if (TArgs.size() < SubClass.TemplateArgs.size())
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return Error(SubClass.RefRange.Start,
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"More template args specified than expected");
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// Loop over all of the template arguments, setting them to the specified
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// value or leaving them as the default if necessary.
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for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
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if (i < SubClass.TemplateArgs.size()) {
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// If a value is specified for this template arg, set it now.
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if (SetValue(CurRec, SubClass.RefRange.Start, TArgs[i],
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None, SubClass.TemplateArgs[i]))
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return true;
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// Resolve it next.
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CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
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// Now remove it.
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CurRec->removeValue(TArgs[i]);
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} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
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return Error(SubClass.RefRange.Start,
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"Value not specified for template argument #" +
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Twine(i) + " (" + TArgs[i]->getAsUnquotedString() +
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") of subclass '" + SC->getNameInitAsString() + "'!");
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}
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}
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// Since everything went well, we can now set the "superclass" list for the
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// current record.
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ArrayRef<std::pair<Record *, SMRange>> SCs = SC->getSuperClasses();
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for (const auto &SCPair : SCs) {
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if (CurRec->isSubClassOf(SCPair.first))
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return Error(SubClass.RefRange.Start,
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"Already subclass of '" + SCPair.first->getName() + "'!\n");
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CurRec->addSuperClass(SCPair.first, SCPair.second);
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}
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if (CurRec->isSubClassOf(SC))
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return Error(SubClass.RefRange.Start,
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"Already subclass of '" + SC->getName() + "'!\n");
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CurRec->addSuperClass(SC, SubClass.RefRange);
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return false;
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}
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/// AddSubMultiClass - Add SubMultiClass as a subclass to
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/// CurMC, resolving its template args as SubMultiClass's
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/// template arguments.
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bool TGParser::AddSubMultiClass(MultiClass *CurMC,
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SubMultiClassReference &SubMultiClass) {
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MultiClass *SMC = SubMultiClass.MC;
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Record *CurRec = &CurMC->Rec;
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// Add all of the values in the subclass into the current class.
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for (const auto &SMCVal : SMC->Rec.getValues())
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if (AddValue(CurRec, SubMultiClass.RefRange.Start, SMCVal))
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return true;
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unsigned newDefStart = CurMC->DefPrototypes.size();
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// Add all of the defs in the subclass into the current multiclass.
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for (const std::unique_ptr<Record> &R : SMC->DefPrototypes) {
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// Clone the def and add it to the current multiclass
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auto NewDef = make_unique<Record>(*R);
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// Add all of the values in the superclass into the current def.
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for (const auto &MCVal : CurRec->getValues())
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if (AddValue(NewDef.get(), SubMultiClass.RefRange.Start, MCVal))
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return true;
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CurMC->DefPrototypes.push_back(std::move(NewDef));
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}
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ArrayRef<Init *> SMCTArgs = SMC->Rec.getTemplateArgs();
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// Ensure that an appropriate number of template arguments are
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// specified.
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if (SMCTArgs.size() < SubMultiClass.TemplateArgs.size())
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return Error(SubMultiClass.RefRange.Start,
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"More template args specified than expected");
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// Loop over all of the template arguments, setting them to the specified
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// value or leaving them as the default if necessary.
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for (unsigned i = 0, e = SMCTArgs.size(); i != e; ++i) {
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if (i < SubMultiClass.TemplateArgs.size()) {
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// If a value is specified for this template arg, set it in the
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// superclass now.
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if (SetValue(CurRec, SubMultiClass.RefRange.Start, SMCTArgs[i],
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None, SubMultiClass.TemplateArgs[i]))
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return true;
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// Resolve it next.
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CurRec->resolveReferencesTo(CurRec->getValue(SMCTArgs[i]));
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// Now remove it.
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CurRec->removeValue(SMCTArgs[i]);
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// If a value is specified for this template arg, set it in the
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// new defs now.
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for (const auto &Def :
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makeArrayRef(CurMC->DefPrototypes).slice(newDefStart)) {
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if (SetValue(Def.get(), SubMultiClass.RefRange.Start, SMCTArgs[i],
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None, SubMultiClass.TemplateArgs[i]))
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return true;
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// Resolve it next.
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Def->resolveReferencesTo(Def->getValue(SMCTArgs[i]));
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// Now remove it
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Def->removeValue(SMCTArgs[i]);
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}
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} else if (!CurRec->getValue(SMCTArgs[i])->getValue()->isComplete()) {
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return Error(SubMultiClass.RefRange.Start,
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"Value not specified for template argument #" +
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Twine(i) + " (" + SMCTArgs[i]->getAsUnquotedString() +
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") of subclass '" + SMC->Rec.getNameInitAsString() + "'!");
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}
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}
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return false;
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}
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/// ProcessForeachDefs - Given a record, apply all of the variable
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/// values in all surrounding foreach loops, creating new records for
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/// each combination of values.
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bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc) {
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if (Loops.empty())
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return false;
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// We want to instantiate a new copy of CurRec for each combination
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// of nested loop iterator values. We don't want top instantiate
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// any copies until we have values for each loop iterator.
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IterSet IterVals;
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return ProcessForeachDefs(CurRec, Loc, IterVals);
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}
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/// ProcessForeachDefs - Given a record, a loop and a loop iterator,
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/// apply each of the variable values in this loop and then process
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/// subloops.
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bool TGParser::ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals){
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// Recursively build a tuple of iterator values.
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if (IterVals.size() != Loops.size()) {
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assert(IterVals.size() < Loops.size());
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ForeachLoop &CurLoop = Loops[IterVals.size()];
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ListInit *List = dyn_cast<ListInit>(CurLoop.ListValue);
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if (!List) {
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Error(Loc, "Loop list is not a list");
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return true;
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}
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// Process each value.
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for (unsigned i = 0; i < List->size(); ++i) {
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Init *ItemVal = List->resolveListElementReference(*CurRec, nullptr, i);
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IterVals.push_back(IterRecord(CurLoop.IterVar, ItemVal));
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if (ProcessForeachDefs(CurRec, Loc, IterVals))
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return true;
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IterVals.pop_back();
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}
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return false;
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}
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// This is the bottom of the recursion. We have all of the iterator values
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// for this point in the iteration space. Instantiate a new record to
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// reflect this combination of values.
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auto IterRec = make_unique<Record>(*CurRec);
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// Set the iterator values now.
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for (IterRecord &IR : IterVals) {
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VarInit *IterVar = IR.IterVar;
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TypedInit *IVal = dyn_cast<TypedInit>(IR.IterValue);
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if (!IVal)
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return Error(Loc, "foreach iterator value is untyped");
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IterRec->addValue(RecordVal(IterVar->getName(), IVal->getType(), false));
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if (SetValue(IterRec.get(), Loc, IterVar->getName(), None, IVal))
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return Error(Loc, "when instantiating this def");
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// Resolve it next.
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IterRec->resolveReferencesTo(IterRec->getValue(IterVar->getName()));
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// Remove it.
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IterRec->removeValue(IterVar->getName());
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}
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if (Records.getDef(IterRec->getNameInitAsString())) {
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// If this record is anonymous, it's no problem, just generate a new name
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if (!IterRec->isAnonymous())
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return Error(Loc, "def already exists: " +IterRec->getNameInitAsString());
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IterRec->setName(GetNewAnonymousName());
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}
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Record *IterRecSave = IterRec.get(); // Keep a copy before release.
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Records.addDef(std::move(IterRec));
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IterRecSave->resolveReferences();
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return false;
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}
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//===----------------------------------------------------------------------===//
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// Parser Code
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//===----------------------------------------------------------------------===//
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/// isObjectStart - Return true if this is a valid first token for an Object.
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static bool isObjectStart(tgtok::TokKind K) {
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return K == tgtok::Class || K == tgtok::Def ||
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K == tgtok::Defm || K == tgtok::Let ||
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K == tgtok::MultiClass || K == tgtok::Foreach;
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}
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/// GetNewAnonymousName - Generate a unique anonymous name that can be used as
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/// an identifier.
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std::string TGParser::GetNewAnonymousName() {
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return "anonymous_" + utostr(AnonCounter++);
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}
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/// ParseObjectName - If an object name is specified, return it. Otherwise,
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/// return 0.
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/// ObjectName ::= Value [ '#' Value ]*
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/// ObjectName ::= /*empty*/
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///
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Init *TGParser::ParseObjectName(MultiClass *CurMultiClass) {
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switch (Lex.getCode()) {
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case tgtok::colon:
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case tgtok::semi:
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case tgtok::l_brace:
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// These are all of the tokens that can begin an object body.
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// Some of these can also begin values but we disallow those cases
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// because they are unlikely to be useful.
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return nullptr;
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default:
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break;
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}
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Record *CurRec = nullptr;
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if (CurMultiClass)
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CurRec = &CurMultiClass->Rec;
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RecTy *Type = nullptr;
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if (CurRec) {
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const TypedInit *CurRecName = dyn_cast<TypedInit>(CurRec->getNameInit());
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if (!CurRecName) {
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TokError("Record name is not typed!");
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return nullptr;
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}
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Type = CurRecName->getType();
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}
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return ParseValue(CurRec, Type, ParseNameMode);
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}
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/// ParseClassID - Parse and resolve a reference to a class name. This returns
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/// null on error.
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///
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/// ClassID ::= ID
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///
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Record *TGParser::ParseClassID() {
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if (Lex.getCode() != tgtok::Id) {
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TokError("expected name for ClassID");
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return nullptr;
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}
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Record *Result = Records.getClass(Lex.getCurStrVal());
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if (!Result)
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TokError("Couldn't find class '" + Lex.getCurStrVal() + "'");
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Lex.Lex();
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return Result;
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}
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/// ParseMultiClassID - Parse and resolve a reference to a multiclass name.
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/// This returns null on error.
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///
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/// MultiClassID ::= ID
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///
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MultiClass *TGParser::ParseMultiClassID() {
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if (Lex.getCode() != tgtok::Id) {
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TokError("expected name for MultiClassID");
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return nullptr;
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}
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MultiClass *Result = MultiClasses[Lex.getCurStrVal()].get();
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if (!Result)
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TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
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Lex.Lex();
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return Result;
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}
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/// ParseSubClassReference - Parse a reference to a subclass or to a templated
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/// subclass. This returns a SubClassRefTy with a null Record* on error.
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///
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/// SubClassRef ::= ClassID
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/// SubClassRef ::= ClassID '<' ValueList '>'
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///
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SubClassReference TGParser::
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ParseSubClassReference(Record *CurRec, bool isDefm) {
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SubClassReference Result;
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Result.RefRange.Start = Lex.getLoc();
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if (isDefm) {
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if (MultiClass *MC = ParseMultiClassID())
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Result.Rec = &MC->Rec;
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} else {
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Result.Rec = ParseClassID();
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}
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if (!Result.Rec) return Result;
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// If there is no template arg list, we're done.
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if (Lex.getCode() != tgtok::less) {
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Result.RefRange.End = Lex.getLoc();
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return Result;
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}
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Lex.Lex(); // Eat the '<'
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if (Lex.getCode() == tgtok::greater) {
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TokError("subclass reference requires a non-empty list of template values");
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Result.Rec = nullptr;
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return Result;
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}
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Result.TemplateArgs = ParseValueList(CurRec, Result.Rec);
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if (Result.TemplateArgs.empty()) {
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Result.Rec = nullptr; // Error parsing value list.
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return Result;
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}
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if (Lex.getCode() != tgtok::greater) {
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TokError("expected '>' in template value list");
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Result.Rec = nullptr;
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return Result;
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}
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Lex.Lex();
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Result.RefRange.End = Lex.getLoc();
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return Result;
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}
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/// ParseSubMultiClassReference - Parse a reference to a subclass or to a
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/// templated submulticlass. This returns a SubMultiClassRefTy with a null
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/// Record* on error.
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///
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/// SubMultiClassRef ::= MultiClassID
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/// SubMultiClassRef ::= MultiClassID '<' ValueList '>'
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///
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SubMultiClassReference TGParser::
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ParseSubMultiClassReference(MultiClass *CurMC) {
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SubMultiClassReference Result;
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Result.RefRange.Start = Lex.getLoc();
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Result.MC = ParseMultiClassID();
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if (!Result.MC) return Result;
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|
|
// If there is no template arg list, we're done.
|
|
if (Lex.getCode() != tgtok::less) {
|
|
Result.RefRange.End = Lex.getLoc();
|
|
return Result;
|
|
}
|
|
Lex.Lex(); // Eat the '<'
|
|
|
|
if (Lex.getCode() == tgtok::greater) {
|
|
TokError("subclass reference requires a non-empty list of template values");
|
|
Result.MC = nullptr;
|
|
return Result;
|
|
}
|
|
|
|
Result.TemplateArgs = ParseValueList(&CurMC->Rec, &Result.MC->Rec);
|
|
if (Result.TemplateArgs.empty()) {
|
|
Result.MC = nullptr; // Error parsing value list.
|
|
return Result;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' in template value list");
|
|
Result.MC = nullptr;
|
|
return Result;
|
|
}
|
|
Lex.Lex();
|
|
Result.RefRange.End = Lex.getLoc();
|
|
|
|
return Result;
|
|
}
|
|
|
|
/// ParseRangePiece - Parse a bit/value range.
|
|
/// RangePiece ::= INTVAL
|
|
/// RangePiece ::= INTVAL '-' INTVAL
|
|
/// RangePiece ::= INTVAL INTVAL
|
|
bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
|
|
if (Lex.getCode() != tgtok::IntVal) {
|
|
TokError("expected integer or bitrange");
|
|
return true;
|
|
}
|
|
int64_t Start = Lex.getCurIntVal();
|
|
int64_t End;
|
|
|
|
if (Start < 0)
|
|
return TokError("invalid range, cannot be negative");
|
|
|
|
switch (Lex.Lex()) { // eat first character.
|
|
default:
|
|
Ranges.push_back(Start);
|
|
return false;
|
|
case tgtok::minus:
|
|
if (Lex.Lex() != tgtok::IntVal) {
|
|
TokError("expected integer value as end of range");
|
|
return true;
|
|
}
|
|
End = Lex.getCurIntVal();
|
|
break;
|
|
case tgtok::IntVal:
|
|
End = -Lex.getCurIntVal();
|
|
break;
|
|
}
|
|
if (End < 0)
|
|
return TokError("invalid range, cannot be negative");
|
|
Lex.Lex();
|
|
|
|
// Add to the range.
|
|
if (Start < End)
|
|
for (; Start <= End; ++Start)
|
|
Ranges.push_back(Start);
|
|
else
|
|
for (; Start >= End; --Start)
|
|
Ranges.push_back(Start);
|
|
return false;
|
|
}
|
|
|
|
/// ParseRangeList - Parse a list of scalars and ranges into scalar values.
|
|
///
|
|
/// RangeList ::= RangePiece (',' RangePiece)*
|
|
///
|
|
std::vector<unsigned> TGParser::ParseRangeList() {
|
|
std::vector<unsigned> Result;
|
|
|
|
// Parse the first piece.
|
|
if (ParseRangePiece(Result))
|
|
return std::vector<unsigned>();
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // Eat the comma.
|
|
|
|
// Parse the next range piece.
|
|
if (ParseRangePiece(Result))
|
|
return std::vector<unsigned>();
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
/// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
|
|
/// OptionalRangeList ::= '<' RangeList '>'
|
|
/// OptionalRangeList ::= /*empty*/
|
|
bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
|
|
if (Lex.getCode() != tgtok::less)
|
|
return false;
|
|
|
|
SMLoc StartLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '<'
|
|
|
|
// Parse the range list.
|
|
Ranges = ParseRangeList();
|
|
if (Ranges.empty()) return true;
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of range list");
|
|
return Error(StartLoc, "to match this '<'");
|
|
}
|
|
Lex.Lex(); // eat the '>'.
|
|
return false;
|
|
}
|
|
|
|
/// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
|
|
/// OptionalBitList ::= '{' RangeList '}'
|
|
/// OptionalBitList ::= /*empty*/
|
|
bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
|
|
if (Lex.getCode() != tgtok::l_brace)
|
|
return false;
|
|
|
|
SMLoc StartLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '{'
|
|
|
|
// Parse the range list.
|
|
Ranges = ParseRangeList();
|
|
if (Ranges.empty()) return true;
|
|
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of bit list");
|
|
return Error(StartLoc, "to match this '{'");
|
|
}
|
|
Lex.Lex(); // eat the '}'.
|
|
return false;
|
|
}
|
|
|
|
|
|
/// ParseType - Parse and return a tblgen type. This returns null on error.
|
|
///
|
|
/// Type ::= STRING // string type
|
|
/// Type ::= CODE // code type
|
|
/// Type ::= BIT // bit type
|
|
/// Type ::= BITS '<' INTVAL '>' // bits<x> type
|
|
/// Type ::= INT // int type
|
|
/// Type ::= LIST '<' Type '>' // list<x> type
|
|
/// Type ::= DAG // dag type
|
|
/// Type ::= ClassID // Record Type
|
|
///
|
|
RecTy *TGParser::ParseType() {
|
|
switch (Lex.getCode()) {
|
|
default: TokError("Unknown token when expecting a type"); return nullptr;
|
|
case tgtok::String: Lex.Lex(); return StringRecTy::get();
|
|
case tgtok::Code: Lex.Lex(); return CodeRecTy::get();
|
|
case tgtok::Bit: Lex.Lex(); return BitRecTy::get();
|
|
case tgtok::Int: Lex.Lex(); return IntRecTy::get();
|
|
case tgtok::Dag: Lex.Lex(); return DagRecTy::get();
|
|
case tgtok::Id:
|
|
if (Record *R = ParseClassID()) return RecordRecTy::get(R);
|
|
return nullptr;
|
|
case tgtok::Bits: {
|
|
if (Lex.Lex() != tgtok::less) { // Eat 'bits'
|
|
TokError("expected '<' after bits type");
|
|
return nullptr;
|
|
}
|
|
if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
|
|
TokError("expected integer in bits<n> type");
|
|
return nullptr;
|
|
}
|
|
uint64_t Val = Lex.getCurIntVal();
|
|
if (Lex.Lex() != tgtok::greater) { // Eat count.
|
|
TokError("expected '>' at end of bits<n> type");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // Eat '>'
|
|
return BitsRecTy::get(Val);
|
|
}
|
|
case tgtok::List: {
|
|
if (Lex.Lex() != tgtok::less) { // Eat 'bits'
|
|
TokError("expected '<' after list type");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // Eat '<'
|
|
RecTy *SubType = ParseType();
|
|
if (!SubType) return nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of list<ty> type");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // Eat '>'
|
|
return ListRecTy::get(SubType);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
|
|
/// has already been read.
|
|
Init *TGParser::ParseIDValue(Record *CurRec,
|
|
const std::string &Name, SMLoc NameLoc,
|
|
IDParseMode Mode) {
|
|
if (CurRec) {
|
|
if (const RecordVal *RV = CurRec->getValue(Name))
|
|
return VarInit::get(Name, RV->getType());
|
|
|
|
Init *TemplateArgName = QualifyName(*CurRec, CurMultiClass, Name, ":");
|
|
|
|
if (CurMultiClass)
|
|
TemplateArgName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
|
|
"::");
|
|
|
|
if (CurRec->isTemplateArg(TemplateArgName)) {
|
|
const RecordVal *RV = CurRec->getValue(TemplateArgName);
|
|
assert(RV && "Template arg doesn't exist??");
|
|
return VarInit::get(TemplateArgName, RV->getType());
|
|
}
|
|
}
|
|
|
|
if (CurMultiClass) {
|
|
Init *MCName = QualifyName(CurMultiClass->Rec, CurMultiClass, Name,
|
|
"::");
|
|
|
|
if (CurMultiClass->Rec.isTemplateArg(MCName)) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
|
|
assert(RV && "Template arg doesn't exist??");
|
|
return VarInit::get(MCName, RV->getType());
|
|
}
|
|
}
|
|
|
|
// If this is in a foreach loop, make sure it's not a loop iterator
|
|
for (const auto &L : Loops) {
|
|
VarInit *IterVar = dyn_cast<VarInit>(L.IterVar);
|
|
if (IterVar && IterVar->getName() == Name)
|
|
return IterVar;
|
|
}
|
|
|
|
if (Mode == ParseNameMode)
|
|
return StringInit::get(Name);
|
|
|
|
if (Record *D = Records.getDef(Name))
|
|
return DefInit::get(D);
|
|
|
|
if (Mode == ParseValueMode) {
|
|
Error(NameLoc, "Variable not defined: '" + Name + "'");
|
|
return nullptr;
|
|
}
|
|
|
|
return StringInit::get(Name);
|
|
}
|
|
|
|
/// ParseOperation - Parse an operator. This returns null on error.
|
|
///
|
|
/// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
|
|
///
|
|
Init *TGParser::ParseOperation(Record *CurRec, RecTy *ItemType) {
|
|
switch (Lex.getCode()) {
|
|
default:
|
|
TokError("unknown operation");
|
|
return nullptr;
|
|
case tgtok::XHead:
|
|
case tgtok::XTail:
|
|
case tgtok::XEmpty:
|
|
case tgtok::XCast: { // Value ::= !unop '(' Value ')'
|
|
UnOpInit::UnaryOp Code;
|
|
RecTy *Type = nullptr;
|
|
|
|
switch (Lex.getCode()) {
|
|
default: llvm_unreachable("Unhandled code!");
|
|
case tgtok::XCast:
|
|
Lex.Lex(); // eat the operation
|
|
Code = UnOpInit::CAST;
|
|
|
|
Type = ParseOperatorType();
|
|
|
|
if (!Type) {
|
|
TokError("did not get type for unary operator");
|
|
return nullptr;
|
|
}
|
|
|
|
break;
|
|
case tgtok::XHead:
|
|
Lex.Lex(); // eat the operation
|
|
Code = UnOpInit::HEAD;
|
|
break;
|
|
case tgtok::XTail:
|
|
Lex.Lex(); // eat the operation
|
|
Code = UnOpInit::TAIL;
|
|
break;
|
|
case tgtok::XEmpty:
|
|
Lex.Lex(); // eat the operation
|
|
Code = UnOpInit::EMPTY;
|
|
Type = IntRecTy::get();
|
|
break;
|
|
}
|
|
if (Lex.getCode() != tgtok::l_paren) {
|
|
TokError("expected '(' after unary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
Init *LHS = ParseValue(CurRec);
|
|
if (!LHS) return nullptr;
|
|
|
|
if (Code == UnOpInit::HEAD ||
|
|
Code == UnOpInit::TAIL ||
|
|
Code == UnOpInit::EMPTY) {
|
|
ListInit *LHSl = dyn_cast<ListInit>(LHS);
|
|
StringInit *LHSs = dyn_cast<StringInit>(LHS);
|
|
TypedInit *LHSt = dyn_cast<TypedInit>(LHS);
|
|
if (!LHSl && !LHSs && !LHSt) {
|
|
TokError("expected list or string type argument in unary operator");
|
|
return nullptr;
|
|
}
|
|
if (LHSt) {
|
|
ListRecTy *LType = dyn_cast<ListRecTy>(LHSt->getType());
|
|
StringRecTy *SType = dyn_cast<StringRecTy>(LHSt->getType());
|
|
if (!LType && !SType) {
|
|
TokError("expected list or string type argument in unary operator");
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
if (Code == UnOpInit::HEAD || Code == UnOpInit::TAIL) {
|
|
if (!LHSl && !LHSt) {
|
|
TokError("expected list type argument in unary operator");
|
|
return nullptr;
|
|
}
|
|
|
|
if (LHSl && LHSl->empty()) {
|
|
TokError("empty list argument in unary operator");
|
|
return nullptr;
|
|
}
|
|
if (LHSl) {
|
|
Init *Item = LHSl->getElement(0);
|
|
TypedInit *Itemt = dyn_cast<TypedInit>(Item);
|
|
if (!Itemt) {
|
|
TokError("untyped list element in unary operator");
|
|
return nullptr;
|
|
}
|
|
Type = (Code == UnOpInit::HEAD) ? Itemt->getType()
|
|
: ListRecTy::get(Itemt->getType());
|
|
} else {
|
|
assert(LHSt && "expected list type argument in unary operator");
|
|
ListRecTy *LType = dyn_cast<ListRecTy>(LHSt->getType());
|
|
if (!LType) {
|
|
TokError("expected list type argument in unary operator");
|
|
return nullptr;
|
|
}
|
|
Type = (Code == UnOpInit::HEAD) ? LType->getElementType() : LType;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in unary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
return (UnOpInit::get(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
|
|
}
|
|
|
|
case tgtok::XConcat:
|
|
case tgtok::XADD:
|
|
case tgtok::XAND:
|
|
case tgtok::XSRA:
|
|
case tgtok::XSRL:
|
|
case tgtok::XSHL:
|
|
case tgtok::XEq:
|
|
case tgtok::XListConcat:
|
|
case tgtok::XStrConcat: { // Value ::= !binop '(' Value ',' Value ')'
|
|
tgtok::TokKind OpTok = Lex.getCode();
|
|
SMLoc OpLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the operation
|
|
|
|
BinOpInit::BinaryOp Code;
|
|
RecTy *Type = nullptr;
|
|
|
|
switch (OpTok) {
|
|
default: llvm_unreachable("Unhandled code!");
|
|
case tgtok::XConcat: Code = BinOpInit::CONCAT;Type = DagRecTy::get(); break;
|
|
case tgtok::XADD: Code = BinOpInit::ADD; Type = IntRecTy::get(); break;
|
|
case tgtok::XAND: Code = BinOpInit::AND; Type = IntRecTy::get(); break;
|
|
case tgtok::XSRA: Code = BinOpInit::SRA; Type = IntRecTy::get(); break;
|
|
case tgtok::XSRL: Code = BinOpInit::SRL; Type = IntRecTy::get(); break;
|
|
case tgtok::XSHL: Code = BinOpInit::SHL; Type = IntRecTy::get(); break;
|
|
case tgtok::XEq: Code = BinOpInit::EQ; Type = BitRecTy::get(); break;
|
|
case tgtok::XListConcat:
|
|
Code = BinOpInit::LISTCONCAT;
|
|
// We don't know the list type until we parse the first argument
|
|
break;
|
|
case tgtok::XStrConcat:
|
|
Code = BinOpInit::STRCONCAT;
|
|
Type = StringRecTy::get();
|
|
break;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::l_paren) {
|
|
TokError("expected '(' after binary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
SmallVector<Init*, 2> InitList;
|
|
|
|
InitList.push_back(ParseValue(CurRec));
|
|
if (!InitList.back()) return nullptr;
|
|
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // eat the ','
|
|
|
|
InitList.push_back(ParseValue(CurRec));
|
|
if (!InitList.back()) return nullptr;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
|
|
// If we are doing !listconcat, we should know the type by now
|
|
if (OpTok == tgtok::XListConcat) {
|
|
if (VarInit *Arg0 = dyn_cast<VarInit>(InitList[0]))
|
|
Type = Arg0->getType();
|
|
else if (ListInit *Arg0 = dyn_cast<ListInit>(InitList[0]))
|
|
Type = Arg0->getType();
|
|
else {
|
|
InitList[0]->dump();
|
|
Error(OpLoc, "expected a list");
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
// We allow multiple operands to associative operators like !strconcat as
|
|
// shorthand for nesting them.
|
|
if (Code == BinOpInit::STRCONCAT || Code == BinOpInit::LISTCONCAT) {
|
|
while (InitList.size() > 2) {
|
|
Init *RHS = InitList.pop_back_val();
|
|
RHS = (BinOpInit::get(Code, InitList.back(), RHS, Type))
|
|
->Fold(CurRec, CurMultiClass);
|
|
InitList.back() = RHS;
|
|
}
|
|
}
|
|
|
|
if (InitList.size() == 2)
|
|
return (BinOpInit::get(Code, InitList[0], InitList[1], Type))
|
|
->Fold(CurRec, CurMultiClass);
|
|
|
|
Error(OpLoc, "expected two operands to operator");
|
|
return nullptr;
|
|
}
|
|
|
|
case tgtok::XIf:
|
|
case tgtok::XForEach:
|
|
case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
|
|
TernOpInit::TernaryOp Code;
|
|
RecTy *Type = nullptr;
|
|
|
|
tgtok::TokKind LexCode = Lex.getCode();
|
|
Lex.Lex(); // eat the operation
|
|
switch (LexCode) {
|
|
default: llvm_unreachable("Unhandled code!");
|
|
case tgtok::XIf:
|
|
Code = TernOpInit::IF;
|
|
break;
|
|
case tgtok::XForEach:
|
|
Code = TernOpInit::FOREACH;
|
|
break;
|
|
case tgtok::XSubst:
|
|
Code = TernOpInit::SUBST;
|
|
break;
|
|
}
|
|
if (Lex.getCode() != tgtok::l_paren) {
|
|
TokError("expected '(' after ternary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
Init *LHS = ParseValue(CurRec);
|
|
if (!LHS) return nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::comma) {
|
|
TokError("expected ',' in ternary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ','
|
|
|
|
Init *MHS = ParseValue(CurRec, ItemType);
|
|
if (!MHS)
|
|
return nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::comma) {
|
|
TokError("expected ',' in ternary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ','
|
|
|
|
Init *RHS = ParseValue(CurRec, ItemType);
|
|
if (!RHS)
|
|
return nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in binary operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
|
|
switch (LexCode) {
|
|
default: llvm_unreachable("Unhandled code!");
|
|
case tgtok::XIf: {
|
|
RecTy *MHSTy = nullptr;
|
|
RecTy *RHSTy = nullptr;
|
|
|
|
if (TypedInit *MHSt = dyn_cast<TypedInit>(MHS))
|
|
MHSTy = MHSt->getType();
|
|
if (BitsInit *MHSbits = dyn_cast<BitsInit>(MHS))
|
|
MHSTy = BitsRecTy::get(MHSbits->getNumBits());
|
|
if (isa<BitInit>(MHS))
|
|
MHSTy = BitRecTy::get();
|
|
|
|
if (TypedInit *RHSt = dyn_cast<TypedInit>(RHS))
|
|
RHSTy = RHSt->getType();
|
|
if (BitsInit *RHSbits = dyn_cast<BitsInit>(RHS))
|
|
RHSTy = BitsRecTy::get(RHSbits->getNumBits());
|
|
if (isa<BitInit>(RHS))
|
|
RHSTy = BitRecTy::get();
|
|
|
|
// For UnsetInit, it's typed from the other hand.
|
|
if (isa<UnsetInit>(MHS))
|
|
MHSTy = RHSTy;
|
|
if (isa<UnsetInit>(RHS))
|
|
RHSTy = MHSTy;
|
|
|
|
if (!MHSTy || !RHSTy) {
|
|
TokError("could not get type for !if");
|
|
return nullptr;
|
|
}
|
|
|
|
if (MHSTy->typeIsConvertibleTo(RHSTy)) {
|
|
Type = RHSTy;
|
|
} else if (RHSTy->typeIsConvertibleTo(MHSTy)) {
|
|
Type = MHSTy;
|
|
} else {
|
|
TokError("inconsistent types for !if");
|
|
return nullptr;
|
|
}
|
|
break;
|
|
}
|
|
case tgtok::XForEach: {
|
|
TypedInit *MHSt = dyn_cast<TypedInit>(MHS);
|
|
if (!MHSt) {
|
|
TokError("could not get type for !foreach");
|
|
return nullptr;
|
|
}
|
|
Type = MHSt->getType();
|
|
break;
|
|
}
|
|
case tgtok::XSubst: {
|
|
TypedInit *RHSt = dyn_cast<TypedInit>(RHS);
|
|
if (!RHSt) {
|
|
TokError("could not get type for !subst");
|
|
return nullptr;
|
|
}
|
|
Type = RHSt->getType();
|
|
break;
|
|
}
|
|
}
|
|
return (TernOpInit::get(Code, LHS, MHS, RHS, Type))->Fold(CurRec,
|
|
CurMultiClass);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseOperatorType - Parse a type for an operator. This returns
|
|
/// null on error.
|
|
///
|
|
/// OperatorType ::= '<' Type '>'
|
|
///
|
|
RecTy *TGParser::ParseOperatorType() {
|
|
RecTy *Type = nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::less) {
|
|
TokError("expected type name for operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the <
|
|
|
|
Type = ParseType();
|
|
|
|
if (!Type) {
|
|
TokError("expected type name for operator");
|
|
return nullptr;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected type name for operator");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the >
|
|
|
|
return Type;
|
|
}
|
|
|
|
|
|
/// ParseSimpleValue - Parse a tblgen value. This returns null on error.
|
|
///
|
|
/// SimpleValue ::= IDValue
|
|
/// SimpleValue ::= INTVAL
|
|
/// SimpleValue ::= STRVAL+
|
|
/// SimpleValue ::= CODEFRAGMENT
|
|
/// SimpleValue ::= '?'
|
|
/// SimpleValue ::= '{' ValueList '}'
|
|
/// SimpleValue ::= ID '<' ValueListNE '>'
|
|
/// SimpleValue ::= '[' ValueList ']'
|
|
/// SimpleValue ::= '(' IDValue DagArgList ')'
|
|
/// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= ADDTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SRATOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= LISTCONCATTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
|
|
///
|
|
Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType,
|
|
IDParseMode Mode) {
|
|
Init *R = nullptr;
|
|
switch (Lex.getCode()) {
|
|
default: TokError("Unknown token when parsing a value"); break;
|
|
case tgtok::paste:
|
|
// This is a leading paste operation. This is deprecated but
|
|
// still exists in some .td files. Ignore it.
|
|
Lex.Lex(); // Skip '#'.
|
|
return ParseSimpleValue(CurRec, ItemType, Mode);
|
|
case tgtok::IntVal: R = IntInit::get(Lex.getCurIntVal()); Lex.Lex(); break;
|
|
case tgtok::BinaryIntVal: {
|
|
auto BinaryVal = Lex.getCurBinaryIntVal();
|
|
SmallVector<Init*, 16> Bits(BinaryVal.second);
|
|
for (unsigned i = 0, e = BinaryVal.second; i != e; ++i)
|
|
Bits[i] = BitInit::get(BinaryVal.first & (1LL << i));
|
|
R = BitsInit::get(Bits);
|
|
Lex.Lex();
|
|
break;
|
|
}
|
|
case tgtok::StrVal: {
|
|
std::string Val = Lex.getCurStrVal();
|
|
Lex.Lex();
|
|
|
|
// Handle multiple consecutive concatenated strings.
|
|
while (Lex.getCode() == tgtok::StrVal) {
|
|
Val += Lex.getCurStrVal();
|
|
Lex.Lex();
|
|
}
|
|
|
|
R = StringInit::get(Val);
|
|
break;
|
|
}
|
|
case tgtok::CodeFragment:
|
|
R = CodeInit::get(Lex.getCurStrVal());
|
|
Lex.Lex();
|
|
break;
|
|
case tgtok::question:
|
|
R = UnsetInit::get();
|
|
Lex.Lex();
|
|
break;
|
|
case tgtok::Id: {
|
|
SMLoc NameLoc = Lex.getLoc();
|
|
std::string Name = Lex.getCurStrVal();
|
|
if (Lex.Lex() != tgtok::less) // consume the Id.
|
|
return ParseIDValue(CurRec, Name, NameLoc, Mode); // Value ::= IDValue
|
|
|
|
// Value ::= ID '<' ValueListNE '>'
|
|
if (Lex.Lex() == tgtok::greater) {
|
|
TokError("expected non-empty value list");
|
|
return nullptr;
|
|
}
|
|
|
|
// This is a CLASS<initvalslist> expression. This is supposed to synthesize
|
|
// a new anonymous definition, deriving from CLASS<initvalslist> with no
|
|
// body.
|
|
Record *Class = Records.getClass(Name);
|
|
if (!Class) {
|
|
Error(NameLoc, "Expected a class name, got '" + Name + "'");
|
|
return nullptr;
|
|
}
|
|
|
|
std::vector<Init*> ValueList = ParseValueList(CurRec, Class);
|
|
if (ValueList.empty()) return nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of value list");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the '>'
|
|
SMLoc EndLoc = Lex.getLoc();
|
|
|
|
// Create the new record, set it as CurRec temporarily.
|
|
auto NewRecOwner = llvm::make_unique<Record>(GetNewAnonymousName(), NameLoc,
|
|
Records, /*IsAnonymous=*/true);
|
|
Record *NewRec = NewRecOwner.get(); // Keep a copy since we may release.
|
|
SubClassReference SCRef;
|
|
SCRef.RefRange = SMRange(NameLoc, EndLoc);
|
|
SCRef.Rec = Class;
|
|
SCRef.TemplateArgs = ValueList;
|
|
// Add info about the subclass to NewRec.
|
|
if (AddSubClass(NewRec, SCRef))
|
|
return nullptr;
|
|
|
|
if (!CurMultiClass) {
|
|
NewRec->resolveReferences();
|
|
Records.addDef(std::move(NewRecOwner));
|
|
} else {
|
|
// This needs to get resolved once the multiclass template arguments are
|
|
// known before any use.
|
|
NewRec->setResolveFirst(true);
|
|
// Otherwise, we're inside a multiclass, add it to the multiclass.
|
|
CurMultiClass->DefPrototypes.push_back(std::move(NewRecOwner));
|
|
|
|
// Copy the template arguments for the multiclass into the def.
|
|
for (Init *TArg : CurMultiClass->Rec.getTemplateArgs()) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(TArg);
|
|
assert(RV && "Template arg doesn't exist?");
|
|
NewRec->addValue(*RV);
|
|
}
|
|
|
|
// We can't return the prototype def here, instead return:
|
|
// !cast<ItemType>(!strconcat(NAME, AnonName)).
|
|
const RecordVal *MCNameRV = CurMultiClass->Rec.getValue("NAME");
|
|
assert(MCNameRV && "multiclass record must have a NAME");
|
|
|
|
return UnOpInit::get(UnOpInit::CAST,
|
|
BinOpInit::get(BinOpInit::STRCONCAT,
|
|
VarInit::get(MCNameRV->getName(),
|
|
MCNameRV->getType()),
|
|
NewRec->getNameInit(),
|
|
StringRecTy::get()),
|
|
Class->getDefInit()->getType());
|
|
}
|
|
|
|
// The result of the expression is a reference to the new record.
|
|
return DefInit::get(NewRec);
|
|
}
|
|
case tgtok::l_brace: { // Value ::= '{' ValueList '}'
|
|
SMLoc BraceLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '{'
|
|
std::vector<Init*> Vals;
|
|
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
Vals = ParseValueList(CurRec);
|
|
if (Vals.empty()) return nullptr;
|
|
}
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of bit list value");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the '}'
|
|
|
|
SmallVector<Init *, 16> NewBits;
|
|
|
|
// As we parse { a, b, ... }, 'a' is the highest bit, but we parse it
|
|
// first. We'll first read everything in to a vector, then we can reverse
|
|
// it to get the bits in the correct order for the BitsInit value.
|
|
for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
|
|
// FIXME: The following two loops would not be duplicated
|
|
// if the API was a little more orthogonal.
|
|
|
|
// bits<n> values are allowed to initialize n bits.
|
|
if (BitsInit *BI = dyn_cast<BitsInit>(Vals[i])) {
|
|
for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
|
|
NewBits.push_back(BI->getBit((e - i) - 1));
|
|
continue;
|
|
}
|
|
// bits<n> can also come from variable initializers.
|
|
if (VarInit *VI = dyn_cast<VarInit>(Vals[i])) {
|
|
if (BitsRecTy *BitsRec = dyn_cast<BitsRecTy>(VI->getType())) {
|
|
for (unsigned i = 0, e = BitsRec->getNumBits(); i != e; ++i)
|
|
NewBits.push_back(VI->getBit((e - i) - 1));
|
|
continue;
|
|
}
|
|
// Fallthrough to try convert this to a bit.
|
|
}
|
|
// All other values must be convertible to just a single bit.
|
|
Init *Bit = Vals[i]->convertInitializerTo(BitRecTy::get());
|
|
if (!Bit) {
|
|
Error(BraceLoc, "Element #" + Twine(i) + " (" + Vals[i]->getAsString() +
|
|
") is not convertable to a bit");
|
|
return nullptr;
|
|
}
|
|
NewBits.push_back(Bit);
|
|
}
|
|
std::reverse(NewBits.begin(), NewBits.end());
|
|
return BitsInit::get(NewBits);
|
|
}
|
|
case tgtok::l_square: { // Value ::= '[' ValueList ']'
|
|
Lex.Lex(); // eat the '['
|
|
std::vector<Init*> Vals;
|
|
|
|
RecTy *DeducedEltTy = nullptr;
|
|
ListRecTy *GivenListTy = nullptr;
|
|
|
|
if (ItemType) {
|
|
ListRecTy *ListType = dyn_cast<ListRecTy>(ItemType);
|
|
if (!ListType) {
|
|
TokError(Twine("Type mismatch for list, expected list type, got ") +
|
|
ItemType->getAsString());
|
|
return nullptr;
|
|
}
|
|
GivenListTy = ListType;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
Vals = ParseValueList(CurRec, nullptr,
|
|
GivenListTy ? GivenListTy->getElementType() : nullptr);
|
|
if (Vals.empty()) return nullptr;
|
|
}
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
TokError("expected ']' at end of list value");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ']'
|
|
|
|
RecTy *GivenEltTy = nullptr;
|
|
if (Lex.getCode() == tgtok::less) {
|
|
// Optional list element type
|
|
Lex.Lex(); // eat the '<'
|
|
|
|
GivenEltTy = ParseType();
|
|
if (!GivenEltTy) {
|
|
// Couldn't parse element type
|
|
return nullptr;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of list element type");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the '>'
|
|
}
|
|
|
|
// Check elements
|
|
RecTy *EltTy = nullptr;
|
|
for (Init *V : Vals) {
|
|
TypedInit *TArg = dyn_cast<TypedInit>(V);
|
|
if (!TArg) {
|
|
TokError("Untyped list element");
|
|
return nullptr;
|
|
}
|
|
if (EltTy) {
|
|
EltTy = resolveTypes(EltTy, TArg->getType());
|
|
if (!EltTy) {
|
|
TokError("Incompatible types in list elements");
|
|
return nullptr;
|
|
}
|
|
} else {
|
|
EltTy = TArg->getType();
|
|
}
|
|
}
|
|
|
|
if (GivenEltTy) {
|
|
if (EltTy) {
|
|
// Verify consistency
|
|
if (!EltTy->typeIsConvertibleTo(GivenEltTy)) {
|
|
TokError("Incompatible types in list elements");
|
|
return nullptr;
|
|
}
|
|
}
|
|
EltTy = GivenEltTy;
|
|
}
|
|
|
|
if (!EltTy) {
|
|
if (!ItemType) {
|
|
TokError("No type for list");
|
|
return nullptr;
|
|
}
|
|
DeducedEltTy = GivenListTy->getElementType();
|
|
} else {
|
|
// Make sure the deduced type is compatible with the given type
|
|
if (GivenListTy) {
|
|
if (!EltTy->typeIsConvertibleTo(GivenListTy->getElementType())) {
|
|
TokError("Element type mismatch for list");
|
|
return nullptr;
|
|
}
|
|
}
|
|
DeducedEltTy = EltTy;
|
|
}
|
|
|
|
return ListInit::get(Vals, DeducedEltTy);
|
|
}
|
|
case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
|
|
Lex.Lex(); // eat the '('
|
|
if (Lex.getCode() != tgtok::Id && Lex.getCode() != tgtok::XCast) {
|
|
TokError("expected identifier in dag init");
|
|
return nullptr;
|
|
}
|
|
|
|
Init *Operator = ParseValue(CurRec);
|
|
if (!Operator) return nullptr;
|
|
|
|
// If the operator name is present, parse it.
|
|
std::string OperatorName;
|
|
if (Lex.getCode() == tgtok::colon) {
|
|
if (Lex.Lex() != tgtok::VarName) { // eat the ':'
|
|
TokError("expected variable name in dag operator");
|
|
return nullptr;
|
|
}
|
|
OperatorName = Lex.getCurStrVal();
|
|
Lex.Lex(); // eat the VarName.
|
|
}
|
|
|
|
std::vector<std::pair<llvm::Init*, std::string> > DagArgs;
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
DagArgs = ParseDagArgList(CurRec);
|
|
if (DagArgs.empty()) return nullptr;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in dag init");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
|
|
return DagInit::get(Operator, OperatorName, DagArgs);
|
|
}
|
|
|
|
case tgtok::XHead:
|
|
case tgtok::XTail:
|
|
case tgtok::XEmpty:
|
|
case tgtok::XCast: // Value ::= !unop '(' Value ')'
|
|
case tgtok::XConcat:
|
|
case tgtok::XADD:
|
|
case tgtok::XAND:
|
|
case tgtok::XSRA:
|
|
case tgtok::XSRL:
|
|
case tgtok::XSHL:
|
|
case tgtok::XEq:
|
|
case tgtok::XListConcat:
|
|
case tgtok::XStrConcat: // Value ::= !binop '(' Value ',' Value ')'
|
|
case tgtok::XIf:
|
|
case tgtok::XForEach:
|
|
case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
|
|
return ParseOperation(CurRec, ItemType);
|
|
}
|
|
}
|
|
|
|
return R;
|
|
}
|
|
|
|
/// ParseValue - Parse a tblgen value. This returns null on error.
|
|
///
|
|
/// Value ::= SimpleValue ValueSuffix*
|
|
/// ValueSuffix ::= '{' BitList '}'
|
|
/// ValueSuffix ::= '[' BitList ']'
|
|
/// ValueSuffix ::= '.' ID
|
|
///
|
|
Init *TGParser::ParseValue(Record *CurRec, RecTy *ItemType, IDParseMode Mode) {
|
|
Init *Result = ParseSimpleValue(CurRec, ItemType, Mode);
|
|
if (!Result) return nullptr;
|
|
|
|
// Parse the suffixes now if present.
|
|
while (1) {
|
|
switch (Lex.getCode()) {
|
|
default: return Result;
|
|
case tgtok::l_brace: {
|
|
if (Mode == ParseNameMode || Mode == ParseForeachMode)
|
|
// This is the beginning of the object body.
|
|
return Result;
|
|
|
|
SMLoc CurlyLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '{'
|
|
std::vector<unsigned> Ranges = ParseRangeList();
|
|
if (Ranges.empty()) return nullptr;
|
|
|
|
// Reverse the bitlist.
|
|
std::reverse(Ranges.begin(), Ranges.end());
|
|
Result = Result->convertInitializerBitRange(Ranges);
|
|
if (!Result) {
|
|
Error(CurlyLoc, "Invalid bit range for value");
|
|
return nullptr;
|
|
}
|
|
|
|
// Eat the '}'.
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of bit range list");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex();
|
|
break;
|
|
}
|
|
case tgtok::l_square: {
|
|
SMLoc SquareLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '['
|
|
std::vector<unsigned> Ranges = ParseRangeList();
|
|
if (Ranges.empty()) return nullptr;
|
|
|
|
Result = Result->convertInitListSlice(Ranges);
|
|
if (!Result) {
|
|
Error(SquareLoc, "Invalid range for list slice");
|
|
return nullptr;
|
|
}
|
|
|
|
// Eat the ']'.
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
TokError("expected ']' at end of list slice");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex();
|
|
break;
|
|
}
|
|
case tgtok::period:
|
|
if (Lex.Lex() != tgtok::Id) { // eat the .
|
|
TokError("expected field identifier after '.'");
|
|
return nullptr;
|
|
}
|
|
if (!Result->getFieldType(Lex.getCurStrVal())) {
|
|
TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
|
|
Result->getAsString() + "'");
|
|
return nullptr;
|
|
}
|
|
Result = FieldInit::get(Result, Lex.getCurStrVal());
|
|
Lex.Lex(); // eat field name
|
|
break;
|
|
|
|
case tgtok::paste:
|
|
SMLoc PasteLoc = Lex.getLoc();
|
|
|
|
// Create a !strconcat() operation, first casting each operand to
|
|
// a string if necessary.
|
|
|
|
TypedInit *LHS = dyn_cast<TypedInit>(Result);
|
|
if (!LHS) {
|
|
Error(PasteLoc, "LHS of paste is not typed!");
|
|
return nullptr;
|
|
}
|
|
|
|
if (LHS->getType() != StringRecTy::get()) {
|
|
LHS = UnOpInit::get(UnOpInit::CAST, LHS, StringRecTy::get());
|
|
}
|
|
|
|
TypedInit *RHS = nullptr;
|
|
|
|
Lex.Lex(); // Eat the '#'.
|
|
switch (Lex.getCode()) {
|
|
case tgtok::colon:
|
|
case tgtok::semi:
|
|
case tgtok::l_brace:
|
|
// These are all of the tokens that can begin an object body.
|
|
// Some of these can also begin values but we disallow those cases
|
|
// because they are unlikely to be useful.
|
|
|
|
// Trailing paste, concat with an empty string.
|
|
RHS = StringInit::get("");
|
|
break;
|
|
|
|
default:
|
|
Init *RHSResult = ParseValue(CurRec, ItemType, ParseNameMode);
|
|
RHS = dyn_cast<TypedInit>(RHSResult);
|
|
if (!RHS) {
|
|
Error(PasteLoc, "RHS of paste is not typed!");
|
|
return nullptr;
|
|
}
|
|
|
|
if (RHS->getType() != StringRecTy::get()) {
|
|
RHS = UnOpInit::get(UnOpInit::CAST, RHS, StringRecTy::get());
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
Result = BinOpInit::get(BinOpInit::STRCONCAT, LHS, RHS,
|
|
StringRecTy::get())->Fold(CurRec, CurMultiClass);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseDagArgList - Parse the argument list for a dag literal expression.
|
|
///
|
|
/// DagArg ::= Value (':' VARNAME)?
|
|
/// DagArg ::= VARNAME
|
|
/// DagArgList ::= DagArg
|
|
/// DagArgList ::= DagArgList ',' DagArg
|
|
std::vector<std::pair<llvm::Init*, std::string> >
|
|
TGParser::ParseDagArgList(Record *CurRec) {
|
|
std::vector<std::pair<llvm::Init*, std::string> > Result;
|
|
|
|
while (1) {
|
|
// DagArg ::= VARNAME
|
|
if (Lex.getCode() == tgtok::VarName) {
|
|
// A missing value is treated like '?'.
|
|
Result.emplace_back(UnsetInit::get(), Lex.getCurStrVal());
|
|
Lex.Lex();
|
|
} else {
|
|
// DagArg ::= Value (':' VARNAME)?
|
|
Init *Val = ParseValue(CurRec);
|
|
if (!Val)
|
|
return std::vector<std::pair<llvm::Init*, std::string> >();
|
|
|
|
// If the variable name is present, add it.
|
|
std::string VarName;
|
|
if (Lex.getCode() == tgtok::colon) {
|
|
if (Lex.Lex() != tgtok::VarName) { // eat the ':'
|
|
TokError("expected variable name in dag literal");
|
|
return std::vector<std::pair<llvm::Init*, std::string> >();
|
|
}
|
|
VarName = Lex.getCurStrVal();
|
|
Lex.Lex(); // eat the VarName.
|
|
}
|
|
|
|
Result.push_back(std::make_pair(Val, VarName));
|
|
}
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat the ','
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
|
|
/// ParseValueList - Parse a comma separated list of values, returning them as a
|
|
/// vector. Note that this always expects to be able to parse at least one
|
|
/// value. It returns an empty list if this is not possible.
|
|
///
|
|
/// ValueList ::= Value (',' Value)
|
|
///
|
|
std::vector<Init*> TGParser::ParseValueList(Record *CurRec, Record *ArgsRec,
|
|
RecTy *EltTy) {
|
|
std::vector<Init*> Result;
|
|
RecTy *ItemType = EltTy;
|
|
unsigned int ArgN = 0;
|
|
if (ArgsRec && !EltTy) {
|
|
ArrayRef<Init *> TArgs = ArgsRec->getTemplateArgs();
|
|
if (TArgs.empty()) {
|
|
TokError("template argument provided to non-template class");
|
|
return std::vector<Init*>();
|
|
}
|
|
const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
|
|
if (!RV) {
|
|
errs() << "Cannot find template arg " << ArgN << " (" << TArgs[ArgN]
|
|
<< ")\n";
|
|
}
|
|
assert(RV && "Template argument record not found??");
|
|
ItemType = RV->getType();
|
|
++ArgN;
|
|
}
|
|
Result.push_back(ParseValue(CurRec, ItemType));
|
|
if (!Result.back()) return std::vector<Init*>();
|
|
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // Eat the comma
|
|
|
|
if (ArgsRec && !EltTy) {
|
|
ArrayRef<Init *> TArgs = ArgsRec->getTemplateArgs();
|
|
if (ArgN >= TArgs.size()) {
|
|
TokError("too many template arguments");
|
|
return std::vector<Init*>();
|
|
}
|
|
const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
|
|
assert(RV && "Template argument record not found??");
|
|
ItemType = RV->getType();
|
|
++ArgN;
|
|
}
|
|
Result.push_back(ParseValue(CurRec, ItemType));
|
|
if (!Result.back()) return std::vector<Init*>();
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
|
|
/// ParseDeclaration - Read a declaration, returning the name of field ID, or an
|
|
/// empty string on error. This can happen in a number of different context's,
|
|
/// including within a def or in the template args for a def (which which case
|
|
/// CurRec will be non-null) and within the template args for a multiclass (in
|
|
/// which case CurRec will be null, but CurMultiClass will be set). This can
|
|
/// also happen within a def that is within a multiclass, which will set both
|
|
/// CurRec and CurMultiClass.
|
|
///
|
|
/// Declaration ::= FIELD? Type ID ('=' Value)?
|
|
///
|
|
Init *TGParser::ParseDeclaration(Record *CurRec,
|
|
bool ParsingTemplateArgs) {
|
|
// Read the field prefix if present.
|
|
bool HasField = Lex.getCode() == tgtok::Field;
|
|
if (HasField) Lex.Lex();
|
|
|
|
RecTy *Type = ParseType();
|
|
if (!Type) return nullptr;
|
|
|
|
if (Lex.getCode() != tgtok::Id) {
|
|
TokError("Expected identifier in declaration");
|
|
return nullptr;
|
|
}
|
|
|
|
SMLoc IdLoc = Lex.getLoc();
|
|
Init *DeclName = StringInit::get(Lex.getCurStrVal());
|
|
Lex.Lex();
|
|
|
|
if (ParsingTemplateArgs) {
|
|
if (CurRec)
|
|
DeclName = QualifyName(*CurRec, CurMultiClass, DeclName, ":");
|
|
else
|
|
assert(CurMultiClass);
|
|
if (CurMultiClass)
|
|
DeclName = QualifyName(CurMultiClass->Rec, CurMultiClass, DeclName,
|
|
"::");
|
|
}
|
|
|
|
// Add the value.
|
|
if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
|
|
return nullptr;
|
|
|
|
// If a value is present, parse it.
|
|
if (Lex.getCode() == tgtok::equal) {
|
|
Lex.Lex();
|
|
SMLoc ValLoc = Lex.getLoc();
|
|
Init *Val = ParseValue(CurRec, Type);
|
|
if (!Val ||
|
|
SetValue(CurRec, ValLoc, DeclName, None, Val))
|
|
// Return the name, even if an error is thrown. This is so that we can
|
|
// continue to make some progress, even without the value having been
|
|
// initialized.
|
|
return DeclName;
|
|
}
|
|
|
|
return DeclName;
|
|
}
|
|
|
|
/// ParseForeachDeclaration - Read a foreach declaration, returning
|
|
/// the name of the declared object or a NULL Init on error. Return
|
|
/// the name of the parsed initializer list through ForeachListName.
|
|
///
|
|
/// ForeachDeclaration ::= ID '=' '[' ValueList ']'
|
|
/// ForeachDeclaration ::= ID '=' '{' RangeList '}'
|
|
/// ForeachDeclaration ::= ID '=' RangePiece
|
|
///
|
|
VarInit *TGParser::ParseForeachDeclaration(ListInit *&ForeachListValue) {
|
|
if (Lex.getCode() != tgtok::Id) {
|
|
TokError("Expected identifier in foreach declaration");
|
|
return nullptr;
|
|
}
|
|
|
|
Init *DeclName = StringInit::get(Lex.getCurStrVal());
|
|
Lex.Lex();
|
|
|
|
// If a value is present, parse it.
|
|
if (Lex.getCode() != tgtok::equal) {
|
|
TokError("Expected '=' in foreach declaration");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex(); // Eat the '='
|
|
|
|
RecTy *IterType = nullptr;
|
|
std::vector<unsigned> Ranges;
|
|
|
|
switch (Lex.getCode()) {
|
|
default: TokError("Unknown token when expecting a range list"); return nullptr;
|
|
case tgtok::l_square: { // '[' ValueList ']'
|
|
Init *List = ParseSimpleValue(nullptr, nullptr, ParseForeachMode);
|
|
ForeachListValue = dyn_cast<ListInit>(List);
|
|
if (!ForeachListValue) {
|
|
TokError("Expected a Value list");
|
|
return nullptr;
|
|
}
|
|
RecTy *ValueType = ForeachListValue->getType();
|
|
ListRecTy *ListType = dyn_cast<ListRecTy>(ValueType);
|
|
if (!ListType) {
|
|
TokError("Value list is not of list type");
|
|
return nullptr;
|
|
}
|
|
IterType = ListType->getElementType();
|
|
break;
|
|
}
|
|
|
|
case tgtok::IntVal: { // RangePiece.
|
|
if (ParseRangePiece(Ranges))
|
|
return nullptr;
|
|
break;
|
|
}
|
|
|
|
case tgtok::l_brace: { // '{' RangeList '}'
|
|
Lex.Lex(); // eat the '{'
|
|
Ranges = ParseRangeList();
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of bit range list");
|
|
return nullptr;
|
|
}
|
|
Lex.Lex();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!Ranges.empty()) {
|
|
assert(!IterType && "Type already initialized?");
|
|
IterType = IntRecTy::get();
|
|
std::vector<Init*> Values;
|
|
for (unsigned R : Ranges)
|
|
Values.push_back(IntInit::get(R));
|
|
ForeachListValue = ListInit::get(Values, IterType);
|
|
}
|
|
|
|
if (!IterType)
|
|
return nullptr;
|
|
|
|
return VarInit::get(DeclName, IterType);
|
|
}
|
|
|
|
/// ParseTemplateArgList - Read a template argument list, which is a non-empty
|
|
/// sequence of template-declarations in <>'s. If CurRec is non-null, these are
|
|
/// template args for a def, which may or may not be in a multiclass. If null,
|
|
/// these are the template args for a multiclass.
|
|
///
|
|
/// TemplateArgList ::= '<' Declaration (',' Declaration)* '>'
|
|
///
|
|
bool TGParser::ParseTemplateArgList(Record *CurRec) {
|
|
assert(Lex.getCode() == tgtok::less && "Not a template arg list!");
|
|
Lex.Lex(); // eat the '<'
|
|
|
|
Record *TheRecToAddTo = CurRec ? CurRec : &CurMultiClass->Rec;
|
|
|
|
// Read the first declaration.
|
|
Init *TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
|
|
if (!TemplArg)
|
|
return true;
|
|
|
|
TheRecToAddTo->addTemplateArg(TemplArg);
|
|
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // eat the ','
|
|
|
|
// Read the following declarations.
|
|
TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
|
|
if (!TemplArg)
|
|
return true;
|
|
TheRecToAddTo->addTemplateArg(TemplArg);
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::greater)
|
|
return TokError("expected '>' at end of template argument list");
|
|
Lex.Lex(); // eat the '>'.
|
|
return false;
|
|
}
|
|
|
|
|
|
/// ParseBodyItem - Parse a single item at within the body of a def or class.
|
|
///
|
|
/// BodyItem ::= Declaration ';'
|
|
/// BodyItem ::= LET ID OptionalBitList '=' Value ';'
|
|
bool TGParser::ParseBodyItem(Record *CurRec) {
|
|
if (Lex.getCode() != tgtok::Let) {
|
|
if (!ParseDeclaration(CurRec, false))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::semi)
|
|
return TokError("expected ';' after declaration");
|
|
Lex.Lex();
|
|
return false;
|
|
}
|
|
|
|
// LET ID OptionalRangeList '=' Value ';'
|
|
if (Lex.Lex() != tgtok::Id)
|
|
return TokError("expected field identifier after let");
|
|
|
|
SMLoc IdLoc = Lex.getLoc();
|
|
std::string FieldName = Lex.getCurStrVal();
|
|
Lex.Lex(); // eat the field name.
|
|
|
|
std::vector<unsigned> BitList;
|
|
if (ParseOptionalBitList(BitList))
|
|
return true;
|
|
std::reverse(BitList.begin(), BitList.end());
|
|
|
|
if (Lex.getCode() != tgtok::equal)
|
|
return TokError("expected '=' in let expression");
|
|
Lex.Lex(); // eat the '='.
|
|
|
|
RecordVal *Field = CurRec->getValue(FieldName);
|
|
if (!Field)
|
|
return TokError("Value '" + FieldName + "' unknown!");
|
|
|
|
RecTy *Type = Field->getType();
|
|
|
|
Init *Val = ParseValue(CurRec, Type);
|
|
if (!Val) return true;
|
|
|
|
if (Lex.getCode() != tgtok::semi)
|
|
return TokError("expected ';' after let expression");
|
|
Lex.Lex();
|
|
|
|
return SetValue(CurRec, IdLoc, FieldName, BitList, Val);
|
|
}
|
|
|
|
/// ParseBody - Read the body of a class or def. Return true on error, false on
|
|
/// success.
|
|
///
|
|
/// Body ::= ';'
|
|
/// Body ::= '{' BodyList '}'
|
|
/// BodyList BodyItem*
|
|
///
|
|
bool TGParser::ParseBody(Record *CurRec) {
|
|
// If this is a null definition, just eat the semi and return.
|
|
if (Lex.getCode() == tgtok::semi) {
|
|
Lex.Lex();
|
|
return false;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::l_brace)
|
|
return TokError("Expected ';' or '{' to start body");
|
|
// Eat the '{'.
|
|
Lex.Lex();
|
|
|
|
while (Lex.getCode() != tgtok::r_brace)
|
|
if (ParseBodyItem(CurRec))
|
|
return true;
|
|
|
|
// Eat the '}'.
|
|
Lex.Lex();
|
|
return false;
|
|
}
|
|
|
|
/// \brief Apply the current let bindings to \a CurRec.
|
|
/// \returns true on error, false otherwise.
|
|
bool TGParser::ApplyLetStack(Record *CurRec) {
|
|
for (std::vector<LetRecord> &LetInfo : LetStack)
|
|
for (LetRecord &LR : LetInfo)
|
|
if (SetValue(CurRec, LR.Loc, LR.Name, LR.Bits, LR.Value))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/// ParseObjectBody - Parse the body of a def or class. This consists of an
|
|
/// optional ClassList followed by a Body. CurRec is the current def or class
|
|
/// that is being parsed.
|
|
///
|
|
/// ObjectBody ::= BaseClassList Body
|
|
/// BaseClassList ::= /*empty*/
|
|
/// BaseClassList ::= ':' BaseClassListNE
|
|
/// BaseClassListNE ::= SubClassRef (',' SubClassRef)*
|
|
///
|
|
bool TGParser::ParseObjectBody(Record *CurRec) {
|
|
// If there is a baseclass list, read it.
|
|
if (Lex.getCode() == tgtok::colon) {
|
|
Lex.Lex();
|
|
|
|
// Read all of the subclasses.
|
|
SubClassReference SubClass = ParseSubClassReference(CurRec, false);
|
|
while (1) {
|
|
// Check for error.
|
|
if (!SubClass.Rec) return true;
|
|
|
|
// Add it.
|
|
if (AddSubClass(CurRec, SubClass))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
SubClass = ParseSubClassReference(CurRec, false);
|
|
}
|
|
}
|
|
|
|
if (ApplyLetStack(CurRec))
|
|
return true;
|
|
|
|
return ParseBody(CurRec);
|
|
}
|
|
|
|
/// ParseDef - Parse and return a top level or multiclass def, return the record
|
|
/// corresponding to it. This returns null on error.
|
|
///
|
|
/// DefInst ::= DEF ObjectName ObjectBody
|
|
///
|
|
bool TGParser::ParseDef(MultiClass *CurMultiClass) {
|
|
SMLoc DefLoc = Lex.getLoc();
|
|
assert(Lex.getCode() == tgtok::Def && "Unknown tok");
|
|
Lex.Lex(); // Eat the 'def' token.
|
|
|
|
// Parse ObjectName and make a record for it.
|
|
std::unique_ptr<Record> CurRecOwner;
|
|
Init *Name = ParseObjectName(CurMultiClass);
|
|
if (Name)
|
|
CurRecOwner = make_unique<Record>(Name, DefLoc, Records);
|
|
else
|
|
CurRecOwner = llvm::make_unique<Record>(GetNewAnonymousName(), DefLoc,
|
|
Records, /*IsAnonymous=*/true);
|
|
Record *CurRec = CurRecOwner.get(); // Keep a copy since we may release.
|
|
|
|
if (!CurMultiClass && Loops.empty()) {
|
|
// Top-level def definition.
|
|
|
|
// Ensure redefinition doesn't happen.
|
|
if (Records.getDef(CurRec->getNameInitAsString()))
|
|
return Error(DefLoc, "def '" + CurRec->getNameInitAsString()+
|
|
"' already defined");
|
|
Records.addDef(std::move(CurRecOwner));
|
|
|
|
if (ParseObjectBody(CurRec))
|
|
return true;
|
|
} else if (CurMultiClass) {
|
|
// Parse the body before adding this prototype to the DefPrototypes vector.
|
|
// That way implicit definitions will be added to the DefPrototypes vector
|
|
// before this object, instantiated prior to defs derived from this object,
|
|
// and this available for indirect name resolution when defs derived from
|
|
// this object are instantiated.
|
|
if (ParseObjectBody(CurRec))
|
|
return true;
|
|
|
|
// Otherwise, a def inside a multiclass, add it to the multiclass.
|
|
for (const auto &Proto : CurMultiClass->DefPrototypes)
|
|
if (Proto->getNameInit() == CurRec->getNameInit())
|
|
return Error(DefLoc, "def '" + CurRec->getNameInitAsString() +
|
|
"' already defined in this multiclass!");
|
|
CurMultiClass->DefPrototypes.push_back(std::move(CurRecOwner));
|
|
} else if (ParseObjectBody(CurRec)) {
|
|
return true;
|
|
}
|
|
|
|
if (!CurMultiClass) // Def's in multiclasses aren't really defs.
|
|
// See Record::setName(). This resolve step will see any new name
|
|
// for the def that might have been created when resolving
|
|
// inheritance, values and arguments above.
|
|
CurRec->resolveReferences();
|
|
|
|
// If ObjectBody has template arguments, it's an error.
|
|
assert(CurRec->getTemplateArgs().empty() && "How'd this get template args?");
|
|
|
|
if (CurMultiClass) {
|
|
// Copy the template arguments for the multiclass into the def.
|
|
for (Init *TArg : CurMultiClass->Rec.getTemplateArgs()) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(TArg);
|
|
assert(RV && "Template arg doesn't exist?");
|
|
CurRec->addValue(*RV);
|
|
}
|
|
}
|
|
|
|
if (ProcessForeachDefs(CurRec, DefLoc))
|
|
return Error(DefLoc, "Could not process loops for def" +
|
|
CurRec->getNameInitAsString());
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseForeach - Parse a for statement. Return the record corresponding
|
|
/// to it. This returns true on error.
|
|
///
|
|
/// Foreach ::= FOREACH Declaration IN '{ ObjectList '}'
|
|
/// Foreach ::= FOREACH Declaration IN Object
|
|
///
|
|
bool TGParser::ParseForeach(MultiClass *CurMultiClass) {
|
|
assert(Lex.getCode() == tgtok::Foreach && "Unknown tok");
|
|
Lex.Lex(); // Eat the 'for' token.
|
|
|
|
// Make a temporary object to record items associated with the for
|
|
// loop.
|
|
ListInit *ListValue = nullptr;
|
|
VarInit *IterName = ParseForeachDeclaration(ListValue);
|
|
if (!IterName)
|
|
return TokError("expected declaration in for");
|
|
|
|
if (Lex.getCode() != tgtok::In)
|
|
return TokError("Unknown tok");
|
|
Lex.Lex(); // Eat the in
|
|
|
|
// Create a loop object and remember it.
|
|
Loops.push_back(ForeachLoop(IterName, ListValue));
|
|
|
|
if (Lex.getCode() != tgtok::l_brace) {
|
|
// FOREACH Declaration IN Object
|
|
if (ParseObject(CurMultiClass))
|
|
return true;
|
|
} else {
|
|
SMLoc BraceLoc = Lex.getLoc();
|
|
// Otherwise, this is a group foreach.
|
|
Lex.Lex(); // eat the '{'.
|
|
|
|
// Parse the object list.
|
|
if (ParseObjectList(CurMultiClass))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of foreach command");
|
|
return Error(BraceLoc, "to match this '{'");
|
|
}
|
|
Lex.Lex(); // Eat the }
|
|
}
|
|
|
|
// We've processed everything in this loop.
|
|
Loops.pop_back();
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseClass - Parse a tblgen class definition.
|
|
///
|
|
/// ClassInst ::= CLASS ID TemplateArgList? ObjectBody
|
|
///
|
|
bool TGParser::ParseClass() {
|
|
assert(Lex.getCode() == tgtok::Class && "Unexpected token!");
|
|
Lex.Lex();
|
|
|
|
if (Lex.getCode() != tgtok::Id)
|
|
return TokError("expected class name after 'class' keyword");
|
|
|
|
Record *CurRec = Records.getClass(Lex.getCurStrVal());
|
|
if (CurRec) {
|
|
// If the body was previously defined, this is an error.
|
|
if (CurRec->getValues().size() > 1 || // Account for NAME.
|
|
!CurRec->getSuperClasses().empty() ||
|
|
!CurRec->getTemplateArgs().empty())
|
|
return TokError("Class '" + CurRec->getNameInitAsString() +
|
|
"' already defined");
|
|
} else {
|
|
// If this is the first reference to this class, create and add it.
|
|
auto NewRec =
|
|
llvm::make_unique<Record>(Lex.getCurStrVal(), Lex.getLoc(), Records);
|
|
CurRec = NewRec.get();
|
|
Records.addClass(std::move(NewRec));
|
|
}
|
|
Lex.Lex(); // eat the name.
|
|
|
|
// If there are template args, parse them.
|
|
if (Lex.getCode() == tgtok::less)
|
|
if (ParseTemplateArgList(CurRec))
|
|
return true;
|
|
|
|
// Finally, parse the object body.
|
|
return ParseObjectBody(CurRec);
|
|
}
|
|
|
|
/// ParseLetList - Parse a non-empty list of assignment expressions into a list
|
|
/// of LetRecords.
|
|
///
|
|
/// LetList ::= LetItem (',' LetItem)*
|
|
/// LetItem ::= ID OptionalRangeList '=' Value
|
|
///
|
|
std::vector<LetRecord> TGParser::ParseLetList() {
|
|
std::vector<LetRecord> Result;
|
|
|
|
while (1) {
|
|
if (Lex.getCode() != tgtok::Id) {
|
|
TokError("expected identifier in let definition");
|
|
return std::vector<LetRecord>();
|
|
}
|
|
std::string Name = Lex.getCurStrVal();
|
|
SMLoc NameLoc = Lex.getLoc();
|
|
Lex.Lex(); // Eat the identifier.
|
|
|
|
// Check for an optional RangeList.
|
|
std::vector<unsigned> Bits;
|
|
if (ParseOptionalRangeList(Bits))
|
|
return std::vector<LetRecord>();
|
|
std::reverse(Bits.begin(), Bits.end());
|
|
|
|
if (Lex.getCode() != tgtok::equal) {
|
|
TokError("expected '=' in let expression");
|
|
return std::vector<LetRecord>();
|
|
}
|
|
Lex.Lex(); // eat the '='.
|
|
|
|
Init *Val = ParseValue(nullptr);
|
|
if (!Val) return std::vector<LetRecord>();
|
|
|
|
// Now that we have everything, add the record.
|
|
Result.emplace_back(std::move(Name), std::move(Bits), Val, NameLoc);
|
|
|
|
if (Lex.getCode() != tgtok::comma)
|
|
return Result;
|
|
Lex.Lex(); // eat the comma.
|
|
}
|
|
}
|
|
|
|
/// ParseTopLevelLet - Parse a 'let' at top level. This can be a couple of
|
|
/// different related productions. This works inside multiclasses too.
|
|
///
|
|
/// Object ::= LET LetList IN '{' ObjectList '}'
|
|
/// Object ::= LET LetList IN Object
|
|
///
|
|
bool TGParser::ParseTopLevelLet(MultiClass *CurMultiClass) {
|
|
assert(Lex.getCode() == tgtok::Let && "Unexpected token");
|
|
Lex.Lex();
|
|
|
|
// Add this entry to the let stack.
|
|
std::vector<LetRecord> LetInfo = ParseLetList();
|
|
if (LetInfo.empty()) return true;
|
|
LetStack.push_back(std::move(LetInfo));
|
|
|
|
if (Lex.getCode() != tgtok::In)
|
|
return TokError("expected 'in' at end of top-level 'let'");
|
|
Lex.Lex();
|
|
|
|
// If this is a scalar let, just handle it now
|
|
if (Lex.getCode() != tgtok::l_brace) {
|
|
// LET LetList IN Object
|
|
if (ParseObject(CurMultiClass))
|
|
return true;
|
|
} else { // Object ::= LETCommand '{' ObjectList '}'
|
|
SMLoc BraceLoc = Lex.getLoc();
|
|
// Otherwise, this is a group let.
|
|
Lex.Lex(); // eat the '{'.
|
|
|
|
// Parse the object list.
|
|
if (ParseObjectList(CurMultiClass))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of top level let command");
|
|
return Error(BraceLoc, "to match this '{'");
|
|
}
|
|
Lex.Lex();
|
|
}
|
|
|
|
// Outside this let scope, this let block is not active.
|
|
LetStack.pop_back();
|
|
return false;
|
|
}
|
|
|
|
/// ParseMultiClass - Parse a multiclass definition.
|
|
///
|
|
/// MultiClassInst ::= MULTICLASS ID TemplateArgList?
|
|
/// ':' BaseMultiClassList '{' MultiClassObject+ '}'
|
|
/// MultiClassObject ::= DefInst
|
|
/// MultiClassObject ::= MultiClassInst
|
|
/// MultiClassObject ::= DefMInst
|
|
/// MultiClassObject ::= LETCommand '{' ObjectList '}'
|
|
/// MultiClassObject ::= LETCommand Object
|
|
///
|
|
bool TGParser::ParseMultiClass() {
|
|
assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");
|
|
Lex.Lex(); // Eat the multiclass token.
|
|
|
|
if (Lex.getCode() != tgtok::Id)
|
|
return TokError("expected identifier after multiclass for name");
|
|
std::string Name = Lex.getCurStrVal();
|
|
|
|
auto Result =
|
|
MultiClasses.insert(std::make_pair(Name,
|
|
llvm::make_unique<MultiClass>(Name, Lex.getLoc(),Records)));
|
|
|
|
if (!Result.second)
|
|
return TokError("multiclass '" + Name + "' already defined");
|
|
|
|
CurMultiClass = Result.first->second.get();
|
|
Lex.Lex(); // Eat the identifier.
|
|
|
|
// If there are template args, parse them.
|
|
if (Lex.getCode() == tgtok::less)
|
|
if (ParseTemplateArgList(nullptr))
|
|
return true;
|
|
|
|
bool inherits = false;
|
|
|
|
// If there are submulticlasses, parse them.
|
|
if (Lex.getCode() == tgtok::colon) {
|
|
inherits = true;
|
|
|
|
Lex.Lex();
|
|
|
|
// Read all of the submulticlasses.
|
|
SubMultiClassReference SubMultiClass =
|
|
ParseSubMultiClassReference(CurMultiClass);
|
|
while (1) {
|
|
// Check for error.
|
|
if (!SubMultiClass.MC) return true;
|
|
|
|
// Add it.
|
|
if (AddSubMultiClass(CurMultiClass, SubMultiClass))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
SubMultiClass = ParseSubMultiClassReference(CurMultiClass);
|
|
}
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::l_brace) {
|
|
if (!inherits)
|
|
return TokError("expected '{' in multiclass definition");
|
|
if (Lex.getCode() != tgtok::semi)
|
|
return TokError("expected ';' in multiclass definition");
|
|
Lex.Lex(); // eat the ';'.
|
|
} else {
|
|
if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
|
|
return TokError("multiclass must contain at least one def");
|
|
|
|
while (Lex.getCode() != tgtok::r_brace) {
|
|
switch (Lex.getCode()) {
|
|
default:
|
|
return TokError("expected 'let', 'def' or 'defm' in multiclass body");
|
|
case tgtok::Let:
|
|
case tgtok::Def:
|
|
case tgtok::Defm:
|
|
case tgtok::Foreach:
|
|
if (ParseObject(CurMultiClass))
|
|
return true;
|
|
break;
|
|
}
|
|
}
|
|
Lex.Lex(); // eat the '}'.
|
|
}
|
|
|
|
CurMultiClass = nullptr;
|
|
return false;
|
|
}
|
|
|
|
Record *TGParser::InstantiateMulticlassDef(MultiClass &MC, Record *DefProto,
|
|
Init *&DefmPrefix,
|
|
SMRange DefmPrefixRange,
|
|
ArrayRef<Init *> TArgs,
|
|
std::vector<Init *> &TemplateVals) {
|
|
// We need to preserve DefProto so it can be reused for later
|
|
// instantiations, so create a new Record to inherit from it.
|
|
|
|
// Add in the defm name. If the defm prefix is empty, give each
|
|
// instantiated def a unique name. Otherwise, if "#NAME#" exists in the
|
|
// name, substitute the prefix for #NAME#. Otherwise, use the defm name
|
|
// as a prefix.
|
|
|
|
bool IsAnonymous = false;
|
|
if (!DefmPrefix) {
|
|
DefmPrefix = StringInit::get(GetNewAnonymousName());
|
|
IsAnonymous = true;
|
|
}
|
|
|
|
Init *DefName = DefProto->getNameInit();
|
|
StringInit *DefNameString = dyn_cast<StringInit>(DefName);
|
|
|
|
if (DefNameString) {
|
|
// We have a fully expanded string so there are no operators to
|
|
// resolve. We should concatenate the given prefix and name.
|
|
DefName =
|
|
BinOpInit::get(BinOpInit::STRCONCAT,
|
|
UnOpInit::get(UnOpInit::CAST, DefmPrefix,
|
|
StringRecTy::get())->Fold(DefProto, &MC),
|
|
DefName, StringRecTy::get())->Fold(DefProto, &MC);
|
|
}
|
|
|
|
// Make a trail of SMLocs from the multiclass instantiations.
|
|
SmallVector<SMLoc, 4> Locs(1, DefmPrefixRange.Start);
|
|
Locs.append(DefProto->getLoc().begin(), DefProto->getLoc().end());
|
|
auto CurRec = make_unique<Record>(DefName, Locs, Records, IsAnonymous);
|
|
|
|
SubClassReference Ref;
|
|
Ref.RefRange = DefmPrefixRange;
|
|
Ref.Rec = DefProto;
|
|
AddSubClass(CurRec.get(), Ref);
|
|
|
|
// Set the value for NAME. We don't resolve references to it 'til later,
|
|
// though, so that uses in nested multiclass names don't get
|
|
// confused.
|
|
if (SetValue(CurRec.get(), Ref.RefRange.Start, "NAME", None, DefmPrefix,
|
|
/*AllowSelfAssignment*/true)) {
|
|
Error(DefmPrefixRange.Start, "Could not resolve " +
|
|
CurRec->getNameInitAsString() + ":NAME to '" +
|
|
DefmPrefix->getAsUnquotedString() + "'");
|
|
return nullptr;
|
|
}
|
|
|
|
// If the DefNameString didn't resolve, we probably have a reference to
|
|
// NAME and need to replace it. We need to do at least this much greedily,
|
|
// otherwise nested multiclasses will end up with incorrect NAME expansions.
|
|
if (!DefNameString) {
|
|
RecordVal *DefNameRV = CurRec->getValue("NAME");
|
|
CurRec->resolveReferencesTo(DefNameRV);
|
|
}
|
|
|
|
if (!CurMultiClass) {
|
|
// Now that we're at the top level, resolve all NAME references
|
|
// in the resultant defs that weren't in the def names themselves.
|
|
RecordVal *DefNameRV = CurRec->getValue("NAME");
|
|
CurRec->resolveReferencesTo(DefNameRV);
|
|
|
|
// Check if the name is a complex pattern.
|
|
// If so, resolve it.
|
|
DefName = CurRec->getNameInit();
|
|
DefNameString = dyn_cast<StringInit>(DefName);
|
|
|
|
// OK the pattern is more complex than simply using NAME.
|
|
// Let's use the heavy weaponery.
|
|
if (!DefNameString) {
|
|
ResolveMulticlassDefArgs(MC, CurRec.get(), DefmPrefixRange.Start,
|
|
Lex.getLoc(), TArgs, TemplateVals,
|
|
false/*Delete args*/);
|
|
DefName = CurRec->getNameInit();
|
|
DefNameString = dyn_cast<StringInit>(DefName);
|
|
|
|
if (!DefNameString)
|
|
DefName = DefName->convertInitializerTo(StringRecTy::get());
|
|
|
|
// We ran out of options here...
|
|
DefNameString = dyn_cast<StringInit>(DefName);
|
|
if (!DefNameString) {
|
|
PrintFatalError(CurRec->getLoc()[CurRec->getLoc().size() - 1],
|
|
DefName->getAsUnquotedString() + " is not a string.");
|
|
return nullptr;
|
|
}
|
|
|
|
CurRec->setName(DefName);
|
|
}
|
|
|
|
// Now that NAME references are resolved and we're at the top level of
|
|
// any multiclass expansions, add the record to the RecordKeeper. If we are
|
|
// currently in a multiclass, it means this defm appears inside a
|
|
// multiclass and its name won't be fully resolvable until we see
|
|
// the top-level defm. Therefore, we don't add this to the
|
|
// RecordKeeper at this point. If we did we could get duplicate
|
|
// defs as more than one probably refers to NAME or some other
|
|
// common internal placeholder.
|
|
|
|
// Ensure redefinition doesn't happen.
|
|
if (Records.getDef(CurRec->getNameInitAsString())) {
|
|
Error(DefmPrefixRange.Start, "def '" + CurRec->getNameInitAsString() +
|
|
"' already defined, instantiating defm with subdef '" +
|
|
DefProto->getNameInitAsString() + "'");
|
|
return nullptr;
|
|
}
|
|
|
|
Record *CurRecSave = CurRec.get(); // Keep a copy before we release.
|
|
Records.addDef(std::move(CurRec));
|
|
return CurRecSave;
|
|
}
|
|
|
|
// FIXME This is bad but the ownership transfer to caller is pretty messy.
|
|
// The unique_ptr in this function at least protects the exits above.
|
|
return CurRec.release();
|
|
}
|
|
|
|
bool TGParser::ResolveMulticlassDefArgs(MultiClass &MC, Record *CurRec,
|
|
SMLoc DefmPrefixLoc, SMLoc SubClassLoc,
|
|
ArrayRef<Init *> TArgs,
|
|
std::vector<Init *> &TemplateVals,
|
|
bool DeleteArgs) {
|
|
// Loop over all of the template arguments, setting them to the specified
|
|
// value or leaving them as the default if necessary.
|
|
for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
|
|
// Check if a value is specified for this temp-arg.
|
|
if (i < TemplateVals.size()) {
|
|
// Set it now.
|
|
if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], None, TemplateVals[i]))
|
|
return true;
|
|
|
|
// Resolve it next.
|
|
CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
|
|
|
|
if (DeleteArgs)
|
|
// Now remove it.
|
|
CurRec->removeValue(TArgs[i]);
|
|
|
|
} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
|
|
return Error(SubClassLoc, "value not specified for template argument #" +
|
|
Twine(i) + " (" + TArgs[i]->getAsUnquotedString() +
|
|
") of multiclassclass '" + MC.Rec.getNameInitAsString() +
|
|
"'");
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TGParser::ResolveMulticlassDef(MultiClass &MC,
|
|
Record *CurRec,
|
|
Record *DefProto,
|
|
SMLoc DefmPrefixLoc) {
|
|
// If the mdef is inside a 'let' expression, add to each def.
|
|
if (ApplyLetStack(CurRec))
|
|
return Error(DefmPrefixLoc, "when instantiating this defm");
|
|
|
|
// Don't create a top level definition for defm inside multiclasses,
|
|
// instead, only update the prototypes and bind the template args
|
|
// with the new created definition.
|
|
if (!CurMultiClass)
|
|
return false;
|
|
for (const auto &Proto : CurMultiClass->DefPrototypes)
|
|
if (Proto->getNameInit() == CurRec->getNameInit())
|
|
return Error(DefmPrefixLoc, "defm '" + CurRec->getNameInitAsString() +
|
|
"' already defined in this multiclass!");
|
|
CurMultiClass->DefPrototypes.push_back(std::unique_ptr<Record>(CurRec));
|
|
|
|
// Copy the template arguments for the multiclass into the new def.
|
|
for (Init * TA : CurMultiClass->Rec.getTemplateArgs()) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(TA);
|
|
assert(RV && "Template arg doesn't exist?");
|
|
CurRec->addValue(*RV);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDefm - Parse the instantiation of a multiclass.
|
|
///
|
|
/// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
|
|
///
|
|
bool TGParser::ParseDefm(MultiClass *CurMultiClass) {
|
|
assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
|
|
SMLoc DefmLoc = Lex.getLoc();
|
|
Init *DefmPrefix = nullptr;
|
|
|
|
if (Lex.Lex() == tgtok::Id) { // eat the defm.
|
|
DefmPrefix = ParseObjectName(CurMultiClass);
|
|
}
|
|
|
|
SMLoc DefmPrefixEndLoc = Lex.getLoc();
|
|
if (Lex.getCode() != tgtok::colon)
|
|
return TokError("expected ':' after defm identifier");
|
|
|
|
// Keep track of the new generated record definitions.
|
|
std::vector<Record*> NewRecDefs;
|
|
|
|
// This record also inherits from a regular class (non-multiclass)?
|
|
bool InheritFromClass = false;
|
|
|
|
// eat the colon.
|
|
Lex.Lex();
|
|
|
|
SMLoc SubClassLoc = Lex.getLoc();
|
|
SubClassReference Ref = ParseSubClassReference(nullptr, true);
|
|
|
|
while (1) {
|
|
if (!Ref.Rec) return true;
|
|
|
|
// To instantiate a multiclass, we need to first get the multiclass, then
|
|
// instantiate each def contained in the multiclass with the SubClassRef
|
|
// template parameters.
|
|
MultiClass *MC = MultiClasses[Ref.Rec->getName()].get();
|
|
assert(MC && "Didn't lookup multiclass correctly?");
|
|
std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
|
|
|
|
// Verify that the correct number of template arguments were specified.
|
|
ArrayRef<Init *> TArgs = MC->Rec.getTemplateArgs();
|
|
if (TArgs.size() < TemplateVals.size())
|
|
return Error(SubClassLoc,
|
|
"more template args specified than multiclass expects");
|
|
|
|
// Loop over all the def's in the multiclass, instantiating each one.
|
|
for (const std::unique_ptr<Record> &DefProto : MC->DefPrototypes) {
|
|
// The record name construction goes as follow:
|
|
// - If the def name is a string, prepend the prefix.
|
|
// - If the def name is a more complex pattern, use that pattern.
|
|
// As a result, the record is instantiated before resolving
|
|
// arguments, as it would make its name a string.
|
|
Record *CurRec = InstantiateMulticlassDef(*MC, DefProto.get(), DefmPrefix,
|
|
SMRange(DefmLoc,
|
|
DefmPrefixEndLoc),
|
|
TArgs, TemplateVals);
|
|
if (!CurRec)
|
|
return true;
|
|
|
|
// Now that the record is instantiated, we can resolve arguments.
|
|
if (ResolveMulticlassDefArgs(*MC, CurRec, DefmLoc, SubClassLoc,
|
|
TArgs, TemplateVals, true/*Delete args*/))
|
|
return Error(SubClassLoc, "could not instantiate def");
|
|
|
|
if (ResolveMulticlassDef(*MC, CurRec, DefProto.get(), DefmLoc))
|
|
return Error(SubClassLoc, "could not instantiate def");
|
|
|
|
// Defs that can be used by other definitions should be fully resolved
|
|
// before any use.
|
|
if (DefProto->isResolveFirst() && !CurMultiClass) {
|
|
CurRec->resolveReferences();
|
|
CurRec->setResolveFirst(false);
|
|
}
|
|
NewRecDefs.push_back(CurRec);
|
|
}
|
|
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
|
|
if (Lex.getCode() != tgtok::Id)
|
|
return TokError("expected identifier");
|
|
|
|
SubClassLoc = Lex.getLoc();
|
|
|
|
// A defm can inherit from regular classes (non-multiclass) as
|
|
// long as they come in the end of the inheritance list.
|
|
InheritFromClass = (Records.getClass(Lex.getCurStrVal()) != nullptr);
|
|
|
|
if (InheritFromClass)
|
|
break;
|
|
|
|
Ref = ParseSubClassReference(nullptr, true);
|
|
}
|
|
|
|
if (InheritFromClass) {
|
|
// Process all the classes to inherit as if they were part of a
|
|
// regular 'def' and inherit all record values.
|
|
SubClassReference SubClass = ParseSubClassReference(nullptr, false);
|
|
while (1) {
|
|
// Check for error.
|
|
if (!SubClass.Rec) return true;
|
|
|
|
// Get the expanded definition prototypes and teach them about
|
|
// the record values the current class to inherit has
|
|
for (Record *CurRec : NewRecDefs) {
|
|
// Add it.
|
|
if (AddSubClass(CurRec, SubClass))
|
|
return true;
|
|
|
|
if (ApplyLetStack(CurRec))
|
|
return true;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
SubClass = ParseSubClassReference(nullptr, false);
|
|
}
|
|
}
|
|
|
|
if (!CurMultiClass)
|
|
for (Record *CurRec : NewRecDefs)
|
|
// See Record::setName(). This resolve step will see any new
|
|
// name for the def that might have been created when resolving
|
|
// inheritance, values and arguments above.
|
|
CurRec->resolveReferences();
|
|
|
|
if (Lex.getCode() != tgtok::semi)
|
|
return TokError("expected ';' at end of defm");
|
|
Lex.Lex();
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseObject
|
|
/// Object ::= ClassInst
|
|
/// Object ::= DefInst
|
|
/// Object ::= MultiClassInst
|
|
/// Object ::= DefMInst
|
|
/// Object ::= LETCommand '{' ObjectList '}'
|
|
/// Object ::= LETCommand Object
|
|
bool TGParser::ParseObject(MultiClass *MC) {
|
|
switch (Lex.getCode()) {
|
|
default:
|
|
return TokError("Expected class, def, defm, multiclass or let definition");
|
|
case tgtok::Let: return ParseTopLevelLet(MC);
|
|
case tgtok::Def: return ParseDef(MC);
|
|
case tgtok::Foreach: return ParseForeach(MC);
|
|
case tgtok::Defm: return ParseDefm(MC);
|
|
case tgtok::Class: return ParseClass();
|
|
case tgtok::MultiClass: return ParseMultiClass();
|
|
}
|
|
}
|
|
|
|
/// ParseObjectList
|
|
/// ObjectList :== Object*
|
|
bool TGParser::ParseObjectList(MultiClass *MC) {
|
|
while (isObjectStart(Lex.getCode())) {
|
|
if (ParseObject(MC))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TGParser::ParseFile() {
|
|
Lex.Lex(); // Prime the lexer.
|
|
if (ParseObjectList()) return true;
|
|
|
|
// If we have unread input at the end of the file, report it.
|
|
if (Lex.getCode() == tgtok::Eof)
|
|
return false;
|
|
|
|
return TokError("Unexpected input at top level");
|
|
}
|
|
|