forked from OSchip/llvm-project
2153 lines
64 KiB
C++
2153 lines
64 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 "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include <algorithm>
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#include <sstream>
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/CommandLine.h"
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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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SMLoc RefLoc;
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Record *Rec;
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std::vector<Init*> TemplateArgs;
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SubClassReference() : Rec(0) {}
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bool isInvalid() const { return Rec == 0; }
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};
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struct SubMultiClassReference {
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SMLoc RefLoc;
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MultiClass *MC;
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std::vector<Init*> TemplateArgs;
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SubMultiClassReference() : MC(0) {}
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bool isInvalid() const { return MC == 0; }
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void dump() const;
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};
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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 (std::vector<Init *>::const_iterator i = TemplateArgs.begin(),
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iend = TemplateArgs.end();
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i != iend;
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++i) {
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(*i)->dump();
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}
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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 == 0)
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CurRec = &CurMultiClass->Rec;
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if (RecordVal *ERV = CurRec->getValue(RV.getName())) {
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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, const std::string &ValName,
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const std::vector<unsigned> &BitList, Init *V) {
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if (!V) return false;
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if (CurRec == 0) CurRec = &CurMultiClass->Rec;
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RecordVal *RV = CurRec->getValue(ValName);
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if (RV == 0)
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return Error(Loc, "Value '" + ValName + "' 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 = dynamic_cast<VarInit*>(V))
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if (VI->getName() == ValName)
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return false;
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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 = dynamic_cast<BitsInit*>(RV->getValue());
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if (CurVal == 0)
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return Error(Loc, "Value '" + ValName + "' 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(new BitsRecTy(BitList.size()));
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if (BI == 0) {
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V->convertInitializerTo(new BitsRecTy(BitList.size()));
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return Error(Loc, "Initializer is not compatible with bit range");
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}
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// We should have a BitsInit type now.
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BitsInit *BInit = dynamic_cast<BitsInit*>(BI);
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assert(BInit != 0);
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BitsInit *NewVal = new BitsInit(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 (NewVal->getBit(Bit))
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return Error(Loc, "Cannot set bit #" + utostr(Bit) + " of value '" +
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ValName + "' more than once");
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NewVal->setBit(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 (NewVal->getBit(i) == 0)
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NewVal->setBit(i, CurVal->getBit(i));
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V = NewVal;
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}
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if (RV->setValue(V))
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return Error(Loc, "Value '" + ValName + "' of type '" +
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RV->getType()->getAsString() +
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"' is incompatible with initializer '" + V->getAsString() +"'");
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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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const std::vector<RecordVal> &Vals = SC->getValues();
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for (unsigned i = 0, e = Vals.size(); i != e; ++i)
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if (AddValue(CurRec, SubClass.RefLoc, Vals[i]))
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return true;
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const std::vector<std::string> &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.RefLoc, "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.RefLoc, TArgs[i], std::vector<unsigned>(),
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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.RefLoc,"Value not specified for template argument #"
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+ utostr(i) + " (" + TArgs[i] + ") of subclass '" +
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SC->getName() + "'!");
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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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const std::vector<Record*> &SCs = SC->getSuperClasses();
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for (unsigned i = 0, e = SCs.size(); i != e; ++i) {
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if (CurRec->isSubClassOf(SCs[i]))
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return Error(SubClass.RefLoc,
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"Already subclass of '" + SCs[i]->getName() + "'!\n");
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CurRec->addSuperClass(SCs[i]);
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}
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if (CurRec->isSubClassOf(SC))
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return Error(SubClass.RefLoc,
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"Already subclass of '" + SC->getName() + "'!\n");
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CurRec->addSuperClass(SC);
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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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const std::vector<RecordVal> &MCVals = CurRec->getValues();
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// Add all of the values in the subclass into the current class.
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const std::vector<RecordVal> &SMCVals = SMC->Rec.getValues();
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for (unsigned i = 0, e = SMCVals.size(); i != e; ++i)
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if (AddValue(CurRec, SubMultiClass.RefLoc, SMCVals[i]))
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return true;
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int 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 (MultiClass::RecordVector::const_iterator i = SMC->DefPrototypes.begin(),
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iend = SMC->DefPrototypes.end();
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i != iend;
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++i) {
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// Clone the def and add it to the current multiclass
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Record *NewDef = new Record(**i);
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// Add all of the values in the superclass into the current def.
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for (unsigned i = 0, e = MCVals.size(); i != e; ++i)
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if (AddValue(NewDef, SubMultiClass.RefLoc, MCVals[i]))
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return true;
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CurMC->DefPrototypes.push_back(NewDef);
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}
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const std::vector<std::string> &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.RefLoc,
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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.RefLoc, SMCTArgs[i],
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std::vector<unsigned>(),
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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 (MultiClass::RecordVector::iterator j =
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CurMC->DefPrototypes.begin() + newDefStart,
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jend = CurMC->DefPrototypes.end();
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j != jend;
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++j) {
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Record *Def = *j;
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if (SetValue(Def, SubMultiClass.RefLoc, SMCTArgs[i],
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std::vector<unsigned>(),
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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.RefLoc,
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"Value not specified for template argument #"
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+ utostr(i) + " (" + SMCTArgs[i] + ") of subclass '" +
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SMC->Rec.getName() + "'!");
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}
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}
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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 || K == tgtok::MultiClass;
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}
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static std::string GetNewAnonymousName() {
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static unsigned AnonCounter = 0;
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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 an anonymous name.
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/// ObjectName ::= ID
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/// ObjectName ::= /*empty*/
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///
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std::string TGParser::ParseObjectName() {
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if (Lex.getCode() != tgtok::Id)
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return GetNewAnonymousName();
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std::string Ret = Lex.getCurStrVal();
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Lex.Lex();
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return Ret;
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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 0;
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}
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Record *Result = Records.getClass(Lex.getCurStrVal());
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if (Result == 0)
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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 ClassID");
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return 0;
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}
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MultiClass *Result = MultiClasses[Lex.getCurStrVal()];
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if (Result == 0)
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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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Record *TGParser::ParseDefmID() {
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if (Lex.getCode() != tgtok::Id) {
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TokError("expected multiclass name");
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return 0;
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}
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MultiClass *MC = MultiClasses[Lex.getCurStrVal()];
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if (MC == 0) {
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TokError("Couldn't find multiclass '" + Lex.getCurStrVal() + "'");
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return 0;
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}
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Lex.Lex();
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return &MC->Rec;
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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.RefLoc = Lex.getLoc();
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if (isDefm)
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Result.Rec = ParseDefmID();
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else
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Result.Rec = ParseClassID();
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if (Result.Rec == 0) 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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return Result;
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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 = 0;
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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 = 0; // 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 = 0;
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return Result;
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}
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Lex.Lex();
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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.RefLoc = Lex.getLoc();
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Result.MC = ParseMultiClassID();
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if (Result.MC == 0) 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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return Result;
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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.MC = 0;
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return Result;
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}
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Result.TemplateArgs = ParseValueList(&CurMC->Rec, &Result.MC->Rec);
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if (Result.TemplateArgs.empty()) {
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Result.MC = 0; // 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.MC = 0;
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return Result;
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}
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Lex.Lex();
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return Result;
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}
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/// ParseRangePiece - Parse a bit/value range.
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/// RangePiece ::= INTVAL
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/// RangePiece ::= INTVAL '-' INTVAL
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/// RangePiece ::= INTVAL INTVAL
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bool TGParser::ParseRangePiece(std::vector<unsigned> &Ranges) {
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if (Lex.getCode() != tgtok::IntVal) {
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TokError("expected integer or bitrange");
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return true;
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}
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int64_t Start = Lex.getCurIntVal();
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int64_t End;
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if (Start < 0)
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return TokError("invalid range, cannot be negative");
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switch (Lex.Lex()) { // eat first character.
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default:
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Ranges.push_back(Start);
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return false;
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case tgtok::minus:
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if (Lex.Lex() != tgtok::IntVal) {
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TokError("expected integer value as end of range");
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return true;
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}
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End = Lex.getCurIntVal();
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break;
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case tgtok::IntVal:
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End = -Lex.getCurIntVal();
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break;
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}
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if (End < 0)
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return TokError("invalid range, cannot be negative");
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Lex.Lex();
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// Add to the range.
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if (Start < End) {
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for (; Start <= End; ++Start)
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Ranges.push_back(Start);
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} else {
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for (; Start >= End; --Start)
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Ranges.push_back(Start);
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}
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return false;
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}
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/// ParseRangeList - Parse a list of scalars and ranges into scalar values.
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///
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/// RangeList ::= RangePiece (',' RangePiece)*
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///
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std::vector<unsigned> TGParser::ParseRangeList() {
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std::vector<unsigned> Result;
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// Parse the first piece.
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if (ParseRangePiece(Result))
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return std::vector<unsigned>();
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while (Lex.getCode() == tgtok::comma) {
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Lex.Lex(); // Eat the comma.
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// Parse the next range piece.
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if (ParseRangePiece(Result))
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return std::vector<unsigned>();
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}
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return Result;
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}
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/// ParseOptionalRangeList - Parse either a range list in <>'s or nothing.
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|
/// 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 ::= BIT // bit type
|
|
/// Type ::= BITS '<' INTVAL '>' // bits<x> type
|
|
/// Type ::= INT // int type
|
|
/// Type ::= LIST '<' Type '>' // list<x> type
|
|
/// Type ::= CODE // code type
|
|
/// Type ::= DAG // dag type
|
|
/// Type ::= ClassID // Record Type
|
|
///
|
|
RecTy *TGParser::ParseType() {
|
|
switch (Lex.getCode()) {
|
|
default: TokError("Unknown token when expecting a type"); return 0;
|
|
case tgtok::String: Lex.Lex(); return new StringRecTy();
|
|
case tgtok::Bit: Lex.Lex(); return new BitRecTy();
|
|
case tgtok::Int: Lex.Lex(); return new IntRecTy();
|
|
case tgtok::Code: Lex.Lex(); return new CodeRecTy();
|
|
case tgtok::Dag: Lex.Lex(); return new DagRecTy();
|
|
case tgtok::Id:
|
|
if (Record *R = ParseClassID()) return new RecordRecTy(R);
|
|
return 0;
|
|
case tgtok::Bits: {
|
|
if (Lex.Lex() != tgtok::less) { // Eat 'bits'
|
|
TokError("expected '<' after bits type");
|
|
return 0;
|
|
}
|
|
if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
|
|
TokError("expected integer in bits<n> type");
|
|
return 0;
|
|
}
|
|
uint64_t Val = Lex.getCurIntVal();
|
|
if (Lex.Lex() != tgtok::greater) { // Eat count.
|
|
TokError("expected '>' at end of bits<n> type");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // Eat '>'
|
|
return new BitsRecTy(Val);
|
|
}
|
|
case tgtok::List: {
|
|
if (Lex.Lex() != tgtok::less) { // Eat 'bits'
|
|
TokError("expected '<' after list type");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // Eat '<'
|
|
RecTy *SubType = ParseType();
|
|
if (SubType == 0) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of list<ty> type");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // Eat '>'
|
|
return new ListRecTy(SubType);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseIDValue - Parse an ID as a value and decode what it means.
|
|
///
|
|
/// IDValue ::= ID [def local value]
|
|
/// IDValue ::= ID [def template arg]
|
|
/// IDValue ::= ID [multiclass local value]
|
|
/// IDValue ::= ID [multiclass template argument]
|
|
/// IDValue ::= ID [def name]
|
|
///
|
|
Init *TGParser::ParseIDValue(Record *CurRec) {
|
|
assert(Lex.getCode() == tgtok::Id && "Expected ID in ParseIDValue");
|
|
std::string Name = Lex.getCurStrVal();
|
|
SMLoc Loc = Lex.getLoc();
|
|
Lex.Lex();
|
|
return ParseIDValue(CurRec, Name, Loc);
|
|
}
|
|
|
|
/// 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) {
|
|
if (CurRec) {
|
|
if (const RecordVal *RV = CurRec->getValue(Name))
|
|
return new VarInit(Name, RV->getType());
|
|
|
|
std::string TemplateArgName = CurRec->getName()+":"+Name;
|
|
if (CurRec->isTemplateArg(TemplateArgName)) {
|
|
const RecordVal *RV = CurRec->getValue(TemplateArgName);
|
|
assert(RV && "Template arg doesn't exist??");
|
|
return new VarInit(TemplateArgName, RV->getType());
|
|
}
|
|
}
|
|
|
|
if (CurMultiClass) {
|
|
std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
|
|
if (CurMultiClass->Rec.isTemplateArg(MCName)) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
|
|
assert(RV && "Template arg doesn't exist??");
|
|
return new VarInit(MCName, RV->getType());
|
|
}
|
|
}
|
|
|
|
if (Record *D = Records.getDef(Name))
|
|
return new DefInit(D);
|
|
|
|
Error(NameLoc, "Variable not defined: '" + Name + "'");
|
|
return 0;
|
|
}
|
|
|
|
/// ParseOperation - Parse an operator. This returns null on error.
|
|
///
|
|
/// Operation ::= XOperator ['<' Type '>'] '(' Args ')'
|
|
///
|
|
Init *TGParser::ParseOperation(Record *CurRec) {
|
|
switch (Lex.getCode()) {
|
|
default:
|
|
TokError("unknown operation");
|
|
return 0;
|
|
break;
|
|
case tgtok::XHead:
|
|
case tgtok::XTail:
|
|
case tgtok::XEmpty:
|
|
case tgtok::XCast: { // Value ::= !unop '(' Value ')'
|
|
UnOpInit::UnaryOp Code;
|
|
RecTy *Type = 0;
|
|
|
|
switch (Lex.getCode()) {
|
|
default: assert(0 && "Unhandled code!");
|
|
case tgtok::XCast:
|
|
Lex.Lex(); // eat the operation
|
|
Code = UnOpInit::CAST;
|
|
|
|
Type = ParseOperatorType();
|
|
|
|
if (Type == 0) {
|
|
TokError("did not get type for unary operator");
|
|
return 0;
|
|
}
|
|
|
|
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 = new IntRecTy;
|
|
break;
|
|
}
|
|
if (Lex.getCode() != tgtok::l_paren) {
|
|
TokError("expected '(' after unary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
Init *LHS = ParseValue(CurRec);
|
|
if (LHS == 0) return 0;
|
|
|
|
if (Code == UnOpInit::HEAD
|
|
|| Code == UnOpInit::TAIL
|
|
|| Code == UnOpInit::EMPTY) {
|
|
ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
|
|
StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
|
|
TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
|
|
if (LHSl == 0 && LHSs == 0 && LHSt == 0) {
|
|
TokError("expected list or string type argument in unary operator");
|
|
return 0;
|
|
}
|
|
if (LHSt) {
|
|
ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
|
|
StringRecTy *SType = dynamic_cast<StringRecTy*>(LHSt->getType());
|
|
if (LType == 0 && SType == 0) {
|
|
TokError("expected list or string type argumnet in unary operator");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (Code == UnOpInit::HEAD
|
|
|| Code == UnOpInit::TAIL) {
|
|
if (LHSl == 0 && LHSt == 0) {
|
|
TokError("expected list type argumnet in unary operator");
|
|
return 0;
|
|
}
|
|
|
|
if (LHSl && LHSl->getSize() == 0) {
|
|
TokError("empty list argument in unary operator");
|
|
return 0;
|
|
}
|
|
if (LHSl) {
|
|
Init *Item = LHSl->getElement(0);
|
|
TypedInit *Itemt = dynamic_cast<TypedInit*>(Item);
|
|
if (Itemt == 0) {
|
|
TokError("untyped list element in unary operator");
|
|
return 0;
|
|
}
|
|
if (Code == UnOpInit::HEAD) {
|
|
Type = Itemt->getType();
|
|
} else {
|
|
Type = new ListRecTy(Itemt->getType());
|
|
}
|
|
} else {
|
|
assert(LHSt && "expected list type argument in unary operator");
|
|
ListRecTy *LType = dynamic_cast<ListRecTy*>(LHSt->getType());
|
|
if (LType == 0) {
|
|
TokError("expected list type argumnet in unary operator");
|
|
return 0;
|
|
}
|
|
if (Code == UnOpInit::HEAD) {
|
|
Type = LType->getElementType();
|
|
} else {
|
|
Type = LType;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in unary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
return (new UnOpInit(Code, LHS, Type))->Fold(CurRec, CurMultiClass);
|
|
}
|
|
|
|
case tgtok::XConcat:
|
|
case tgtok::XSRA:
|
|
case tgtok::XSRL:
|
|
case tgtok::XSHL:
|
|
case tgtok::XEq:
|
|
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 = 0;
|
|
|
|
switch (OpTok) {
|
|
default: assert(0 && "Unhandled code!");
|
|
case tgtok::XConcat: Code = BinOpInit::CONCAT; Type = new DagRecTy(); break;
|
|
case tgtok::XSRA: Code = BinOpInit::SRA; Type = new IntRecTy(); break;
|
|
case tgtok::XSRL: Code = BinOpInit::SRL; Type = new IntRecTy(); break;
|
|
case tgtok::XSHL: Code = BinOpInit::SHL; Type = new IntRecTy(); break;
|
|
case tgtok::XEq: Code = BinOpInit::EQ; Type = new BitRecTy(); break;
|
|
case tgtok::XStrConcat:
|
|
Code = BinOpInit::STRCONCAT;
|
|
Type = new StringRecTy();
|
|
break;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::l_paren) {
|
|
TokError("expected '(' after binary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
SmallVector<Init*, 2> InitList;
|
|
|
|
InitList.push_back(ParseValue(CurRec));
|
|
if (InitList.back() == 0) return 0;
|
|
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // eat the ','
|
|
|
|
InitList.push_back(ParseValue(CurRec));
|
|
if (InitList.back() == 0) return 0;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
|
|
// We allow multiple operands to associative operators like !strconcat as
|
|
// shorthand for nesting them.
|
|
if (Code == BinOpInit::STRCONCAT) {
|
|
while (InitList.size() > 2) {
|
|
Init *RHS = InitList.pop_back_val();
|
|
RHS = (new BinOpInit(Code, InitList.back(), RHS, Type))
|
|
->Fold(CurRec, CurMultiClass);
|
|
InitList.back() = RHS;
|
|
}
|
|
}
|
|
|
|
if (InitList.size() == 2)
|
|
return (new BinOpInit(Code, InitList[0], InitList[1], Type))
|
|
->Fold(CurRec, CurMultiClass);
|
|
|
|
Error(OpLoc, "expected two operands to operator");
|
|
return 0;
|
|
}
|
|
|
|
case tgtok::XIf:
|
|
case tgtok::XForEach:
|
|
case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
|
|
TernOpInit::TernaryOp Code;
|
|
RecTy *Type = 0;
|
|
|
|
tgtok::TokKind LexCode = Lex.getCode();
|
|
Lex.Lex(); // eat the operation
|
|
switch (LexCode) {
|
|
default: assert(0 && "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 0;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
Init *LHS = ParseValue(CurRec);
|
|
if (LHS == 0) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::comma) {
|
|
TokError("expected ',' in ternary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ','
|
|
|
|
Init *MHS = ParseValue(CurRec);
|
|
if (MHS == 0) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::comma) {
|
|
TokError("expected ',' in ternary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ','
|
|
|
|
Init *RHS = ParseValue(CurRec);
|
|
if (RHS == 0) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in binary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
|
|
switch (LexCode) {
|
|
default: assert(0 && "Unhandled code!");
|
|
case tgtok::XIf: {
|
|
// FIXME: The `!if' operator doesn't handle non-TypedInit well at
|
|
// all. This can be made much more robust.
|
|
TypedInit *MHSt = dynamic_cast<TypedInit*>(MHS);
|
|
TypedInit *RHSt = dynamic_cast<TypedInit*>(RHS);
|
|
|
|
RecTy *MHSTy = 0;
|
|
RecTy *RHSTy = 0;
|
|
|
|
if (MHSt == 0 && RHSt == 0) {
|
|
BitsInit *MHSbits = dynamic_cast<BitsInit*>(MHS);
|
|
BitsInit *RHSbits = dynamic_cast<BitsInit*>(RHS);
|
|
|
|
if (MHSbits && RHSbits &&
|
|
MHSbits->getNumBits() == RHSbits->getNumBits()) {
|
|
Type = new BitRecTy();
|
|
break;
|
|
} else {
|
|
BitInit *MHSbit = dynamic_cast<BitInit*>(MHS);
|
|
BitInit *RHSbit = dynamic_cast<BitInit*>(RHS);
|
|
|
|
if (MHSbit && RHSbit) {
|
|
Type = new BitRecTy();
|
|
break;
|
|
}
|
|
}
|
|
} else if (MHSt != 0 && RHSt != 0) {
|
|
MHSTy = MHSt->getType();
|
|
RHSTy = RHSt->getType();
|
|
}
|
|
|
|
if (!MHSTy || !RHSTy) {
|
|
TokError("could not get type for !if");
|
|
return 0;
|
|
}
|
|
|
|
if (MHSTy->typeIsConvertibleTo(RHSTy)) {
|
|
Type = RHSTy;
|
|
} else if (RHSTy->typeIsConvertibleTo(MHSTy)) {
|
|
Type = MHSTy;
|
|
} else {
|
|
TokError("inconsistent types for !if");
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
case tgtok::XForEach: {
|
|
TypedInit *MHSt = dynamic_cast<TypedInit *>(MHS);
|
|
if (MHSt == 0) {
|
|
TokError("could not get type for !foreach");
|
|
return 0;
|
|
}
|
|
Type = MHSt->getType();
|
|
break;
|
|
}
|
|
case tgtok::XSubst: {
|
|
TypedInit *RHSt = dynamic_cast<TypedInit *>(RHS);
|
|
if (RHSt == 0) {
|
|
TokError("could not get type for !subst");
|
|
return 0;
|
|
}
|
|
Type = RHSt->getType();
|
|
break;
|
|
}
|
|
}
|
|
return (new TernOpInit(Code, LHS, MHS, RHS, Type))->Fold(CurRec,
|
|
CurMultiClass);
|
|
}
|
|
}
|
|
TokError("could not parse operation");
|
|
return 0;
|
|
}
|
|
|
|
/// ParseOperatorType - Parse a type for an operator. This returns
|
|
/// null on error.
|
|
///
|
|
/// OperatorType ::= '<' Type '>'
|
|
///
|
|
RecTy *TGParser::ParseOperatorType() {
|
|
RecTy *Type = 0;
|
|
|
|
if (Lex.getCode() != tgtok::less) {
|
|
TokError("expected type name for operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the <
|
|
|
|
Type = ParseType();
|
|
|
|
if (Type == 0) {
|
|
TokError("expected type name for operator");
|
|
return 0;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected type name for operator");
|
|
return 0;
|
|
}
|
|
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 ::= SHLTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SRATOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
|
|
///
|
|
Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType) {
|
|
Init *R = 0;
|
|
switch (Lex.getCode()) {
|
|
default: TokError("Unknown token when parsing a value"); break;
|
|
case tgtok::IntVal: R = new IntInit(Lex.getCurIntVal()); 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 = new StringInit(Val);
|
|
break;
|
|
}
|
|
case tgtok::CodeFragment:
|
|
R = new CodeInit(Lex.getCurStrVal());
|
|
Lex.Lex();
|
|
break;
|
|
case tgtok::question:
|
|
R = new UnsetInit();
|
|
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); // Value ::= IDValue
|
|
|
|
// Value ::= ID '<' ValueListNE '>'
|
|
if (Lex.Lex() == tgtok::greater) {
|
|
TokError("expected non-empty value list");
|
|
return 0;
|
|
}
|
|
|
|
// 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 0;
|
|
}
|
|
|
|
std::vector<Init*> ValueList = ParseValueList(CurRec, Class);
|
|
if (ValueList.empty()) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of value list");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '>'
|
|
|
|
// Create the new record, set it as CurRec temporarily.
|
|
static unsigned AnonCounter = 0;
|
|
Record *NewRec = new Record("anonymous.val."+utostr(AnonCounter++),
|
|
NameLoc,
|
|
Records);
|
|
SubClassReference SCRef;
|
|
SCRef.RefLoc = NameLoc;
|
|
SCRef.Rec = Class;
|
|
SCRef.TemplateArgs = ValueList;
|
|
// Add info about the subclass to NewRec.
|
|
if (AddSubClass(NewRec, SCRef))
|
|
return 0;
|
|
NewRec->resolveReferences();
|
|
Records.addDef(NewRec);
|
|
|
|
// The result of the expression is a reference to the new record.
|
|
return new DefInit(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 0;
|
|
}
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of bit list value");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '}'
|
|
|
|
BitsInit *Result = new BitsInit(Vals.size());
|
|
for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
|
|
Init *Bit = Vals[i]->convertInitializerTo(new BitRecTy());
|
|
if (Bit == 0) {
|
|
Error(BraceLoc, "Element #" + utostr(i) + " (" + Vals[i]->getAsString()+
|
|
") is not convertable to a bit");
|
|
return 0;
|
|
}
|
|
Result->setBit(Vals.size()-i-1, Bit);
|
|
}
|
|
return Result;
|
|
}
|
|
case tgtok::l_square: { // Value ::= '[' ValueList ']'
|
|
Lex.Lex(); // eat the '['
|
|
std::vector<Init*> Vals;
|
|
|
|
RecTy *DeducedEltTy = 0;
|
|
ListRecTy *GivenListTy = 0;
|
|
|
|
if (ItemType != 0) {
|
|
ListRecTy *ListType = dynamic_cast<ListRecTy*>(ItemType);
|
|
if (ListType == 0) {
|
|
std::stringstream s;
|
|
s << "Type mismatch for list, expected list type, got "
|
|
<< ItemType->getAsString();
|
|
TokError(s.str());
|
|
return 0;
|
|
}
|
|
GivenListTy = ListType;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
Vals = ParseValueList(CurRec, 0,
|
|
GivenListTy ? GivenListTy->getElementType() : 0);
|
|
if (Vals.empty()) return 0;
|
|
}
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
TokError("expected ']' at end of list value");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ']'
|
|
|
|
RecTy *GivenEltTy = 0;
|
|
if (Lex.getCode() == tgtok::less) {
|
|
// Optional list element type
|
|
Lex.Lex(); // eat the '<'
|
|
|
|
GivenEltTy = ParseType();
|
|
if (GivenEltTy == 0) {
|
|
// Couldn't parse element type
|
|
return 0;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of list element type");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '>'
|
|
}
|
|
|
|
// Check elements
|
|
RecTy *EltTy = 0;
|
|
for (std::vector<Init *>::iterator i = Vals.begin(), ie = Vals.end();
|
|
i != ie;
|
|
++i) {
|
|
TypedInit *TArg = dynamic_cast<TypedInit*>(*i);
|
|
if (TArg == 0) {
|
|
TokError("Untyped list element");
|
|
return 0;
|
|
}
|
|
if (EltTy != 0) {
|
|
EltTy = resolveTypes(EltTy, TArg->getType());
|
|
if (EltTy == 0) {
|
|
TokError("Incompatible types in list elements");
|
|
return 0;
|
|
}
|
|
} else {
|
|
EltTy = TArg->getType();
|
|
}
|
|
}
|
|
|
|
if (GivenEltTy != 0) {
|
|
if (EltTy != 0) {
|
|
// Verify consistency
|
|
if (!EltTy->typeIsConvertibleTo(GivenEltTy)) {
|
|
TokError("Incompatible types in list elements");
|
|
return 0;
|
|
}
|
|
}
|
|
EltTy = GivenEltTy;
|
|
}
|
|
|
|
if (EltTy == 0) {
|
|
if (ItemType == 0) {
|
|
TokError("No type for list");
|
|
return 0;
|
|
}
|
|
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 0;
|
|
}
|
|
}
|
|
DeducedEltTy = EltTy;
|
|
}
|
|
|
|
return new ListInit(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 0;
|
|
}
|
|
|
|
Init *Operator = ParseValue(CurRec);
|
|
if (Operator == 0) return 0;
|
|
|
|
// 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 0;
|
|
}
|
|
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 0;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::r_paren) {
|
|
TokError("expected ')' in dag init");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ')'
|
|
|
|
return new DagInit(Operator, OperatorName, DagArgs);
|
|
}
|
|
|
|
case tgtok::XHead:
|
|
case tgtok::XTail:
|
|
case tgtok::XEmpty:
|
|
case tgtok::XCast: // Value ::= !unop '(' Value ')'
|
|
case tgtok::XConcat:
|
|
case tgtok::XSRA:
|
|
case tgtok::XSRL:
|
|
case tgtok::XSHL:
|
|
case tgtok::XEq:
|
|
case tgtok::XStrConcat: // Value ::= !binop '(' Value ',' Value ')'
|
|
case tgtok::XIf:
|
|
case tgtok::XForEach:
|
|
case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
|
|
return ParseOperation(CurRec);
|
|
}
|
|
}
|
|
|
|
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) {
|
|
Init *Result = ParseSimpleValue(CurRec, ItemType);
|
|
if (Result == 0) return 0;
|
|
|
|
// Parse the suffixes now if present.
|
|
while (1) {
|
|
switch (Lex.getCode()) {
|
|
default: return Result;
|
|
case tgtok::l_brace: {
|
|
SMLoc CurlyLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '{'
|
|
std::vector<unsigned> Ranges = ParseRangeList();
|
|
if (Ranges.empty()) return 0;
|
|
|
|
// Reverse the bitlist.
|
|
std::reverse(Ranges.begin(), Ranges.end());
|
|
Result = Result->convertInitializerBitRange(Ranges);
|
|
if (Result == 0) {
|
|
Error(CurlyLoc, "Invalid bit range for value");
|
|
return 0;
|
|
}
|
|
|
|
// Eat the '}'.
|
|
if (Lex.getCode() != tgtok::r_brace) {
|
|
TokError("expected '}' at end of bit range list");
|
|
return 0;
|
|
}
|
|
Lex.Lex();
|
|
break;
|
|
}
|
|
case tgtok::l_square: {
|
|
SMLoc SquareLoc = Lex.getLoc();
|
|
Lex.Lex(); // eat the '['
|
|
std::vector<unsigned> Ranges = ParseRangeList();
|
|
if (Ranges.empty()) return 0;
|
|
|
|
Result = Result->convertInitListSlice(Ranges);
|
|
if (Result == 0) {
|
|
Error(SquareLoc, "Invalid range for list slice");
|
|
return 0;
|
|
}
|
|
|
|
// Eat the ']'.
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
TokError("expected ']' at end of list slice");
|
|
return 0;
|
|
}
|
|
Lex.Lex();
|
|
break;
|
|
}
|
|
case tgtok::period:
|
|
if (Lex.Lex() != tgtok::Id) { // eat the .
|
|
TokError("expected field identifier after '.'");
|
|
return 0;
|
|
}
|
|
if (!Result->getFieldType(Lex.getCurStrVal())) {
|
|
TokError("Cannot access field '" + Lex.getCurStrVal() + "' of value '" +
|
|
Result->getAsString() + "'");
|
|
return 0;
|
|
}
|
|
Result = new FieldInit(Result, Lex.getCurStrVal());
|
|
Lex.Lex(); // eat field name
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseDagArgList - Parse the argument list for a dag literal expression.
|
|
///
|
|
/// ParseDagArgList ::= Value (':' VARNAME)?
|
|
/// ParseDagArgList ::= ParseDagArgList ',' Value (':' VARNAME)?
|
|
std::vector<std::pair<llvm::Init*, std::string> >
|
|
TGParser::ParseDagArgList(Record *CurRec) {
|
|
std::vector<std::pair<llvm::Init*, std::string> > Result;
|
|
|
|
while (1) {
|
|
Init *Val = ParseValue(CurRec);
|
|
if (Val == 0) 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 != 0 && EltTy == 0) {
|
|
const std::vector<std::string> &TArgs = ArgsRec->getTemplateArgs();
|
|
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() == 0) return std::vector<Init*>();
|
|
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // Eat the comma
|
|
|
|
if (ArgsRec != 0 && EltTy == 0) {
|
|
const std::vector<std::string> &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() == 0) 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)?
|
|
///
|
|
std::string 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 == 0) return "";
|
|
|
|
if (Lex.getCode() != tgtok::Id) {
|
|
TokError("Expected identifier in declaration");
|
|
return "";
|
|
}
|
|
|
|
SMLoc IdLoc = Lex.getLoc();
|
|
std::string DeclName = Lex.getCurStrVal();
|
|
Lex.Lex();
|
|
|
|
if (ParsingTemplateArgs) {
|
|
if (CurRec) {
|
|
DeclName = CurRec->getName() + ":" + DeclName;
|
|
} else {
|
|
assert(CurMultiClass);
|
|
}
|
|
if (CurMultiClass)
|
|
DeclName = CurMultiClass->Rec.getName() + "::" + DeclName;
|
|
}
|
|
|
|
// Add the value.
|
|
if (AddValue(CurRec, IdLoc, RecordVal(DeclName, Type, HasField)))
|
|
return "";
|
|
|
|
// 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 == 0 ||
|
|
SetValue(CurRec, ValLoc, DeclName, std::vector<unsigned>(), Val))
|
|
return "";
|
|
}
|
|
|
|
return DeclName;
|
|
}
|
|
|
|
/// 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.
|
|
std::string TemplArg = ParseDeclaration(CurRec, true/*templateargs*/);
|
|
if (TemplArg.empty())
|
|
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.empty())
|
|
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).empty())
|
|
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 == 0)
|
|
return TokError("Value '" + FieldName + "' unknown!");
|
|
|
|
RecTy *Type = Field->getType();
|
|
|
|
Init *Val = ParseValue(CurRec, Type);
|
|
if (Val == 0) 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;
|
|
}
|
|
|
|
/// 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 == 0) return true;
|
|
|
|
// Add it.
|
|
if (AddSubClass(CurRec, SubClass))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
SubClass = ParseSubClassReference(CurRec, false);
|
|
}
|
|
}
|
|
|
|
// Process any variables on the let stack.
|
|
for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
|
|
for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
|
|
if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
|
|
LetStack[i][j].Bits, LetStack[i][j].Value))
|
|
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.
|
|
Record *CurRec = new Record(ParseObjectName(), DefLoc, Records);
|
|
|
|
if (!CurMultiClass) {
|
|
// Top-level def definition.
|
|
|
|
// Ensure redefinition doesn't happen.
|
|
if (Records.getDef(CurRec->getName())) {
|
|
Error(DefLoc, "def '" + CurRec->getName() + "' already defined");
|
|
return true;
|
|
}
|
|
Records.addDef(CurRec);
|
|
} else {
|
|
// Otherwise, a def inside a multiclass, add it to the multiclass.
|
|
for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
|
|
if (CurMultiClass->DefPrototypes[i]->getName() == CurRec->getName()) {
|
|
Error(DefLoc, "def '" + CurRec->getName() +
|
|
"' already defined in this multiclass!");
|
|
return true;
|
|
}
|
|
CurMultiClass->DefPrototypes.push_back(CurRec);
|
|
}
|
|
|
|
if (ParseObjectBody(CurRec))
|
|
return true;
|
|
|
|
if (CurMultiClass == 0) // Def's in multiclasses aren't really defs.
|
|
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.
|
|
const std::vector<std::string> &TArgs =
|
|
CurMultiClass->Rec.getTemplateArgs();
|
|
|
|
for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(TArgs[i]);
|
|
assert(RV && "Template arg doesn't exist?");
|
|
CurRec->addValue(*RV);
|
|
}
|
|
}
|
|
|
|
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().empty() ||
|
|
!CurRec->getSuperClasses().empty() ||
|
|
!CurRec->getTemplateArgs().empty())
|
|
return TokError("Class '" + CurRec->getName() + "' already defined");
|
|
} else {
|
|
// If this is the first reference to this class, create and add it.
|
|
CurRec = new Record(Lex.getCurStrVal(), Lex.getLoc(), Records);
|
|
Records.addClass(CurRec);
|
|
}
|
|
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(0);
|
|
if (Val == 0) return std::vector<LetRecord>();
|
|
|
|
// Now that we have everything, add the record.
|
|
Result.push_back(LetRecord(Name, 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(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 '{' MultiClassDef+ '}'
|
|
///
|
|
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();
|
|
|
|
if (MultiClasses.count(Name))
|
|
return TokError("multiclass '" + Name + "' already defined");
|
|
|
|
CurMultiClass = MultiClasses[Name] = new MultiClass(Name,
|
|
Lex.getLoc(), Records);
|
|
Lex.Lex(); // Eat the identifier.
|
|
|
|
// If there are template args, parse them.
|
|
if (Lex.getCode() == tgtok::less)
|
|
if (ParseTemplateArgList(0))
|
|
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 == 0) 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");
|
|
else if (Lex.getCode() != tgtok::semi)
|
|
return TokError("expected ';' in multiclass definition");
|
|
else
|
|
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:
|
|
if (ParseObject(CurMultiClass))
|
|
return true;
|
|
break;
|
|
}
|
|
}
|
|
Lex.Lex(); // eat the '}'.
|
|
}
|
|
|
|
CurMultiClass = 0;
|
|
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!");
|
|
|
|
std::string DefmPrefix;
|
|
if (Lex.Lex() == tgtok::Id) { // eat the defm.
|
|
DefmPrefix = Lex.getCurStrVal();
|
|
Lex.Lex(); // Eat the defm prefix.
|
|
}
|
|
|
|
SMLoc DefmPrefixLoc = 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(0, true);
|
|
|
|
while (1) {
|
|
if (Ref.Rec == 0) 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()];
|
|
assert(MC && "Didn't lookup multiclass correctly?");
|
|
std::vector<Init*> &TemplateVals = Ref.TemplateArgs;
|
|
|
|
// Verify that the correct number of template arguments were specified.
|
|
const std::vector<std::string> &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 (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
|
|
Record *DefProto = MC->DefPrototypes[i];
|
|
|
|
// 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.
|
|
std::string DefName = DefProto->getName();
|
|
if (DefmPrefix.empty()) {
|
|
DefName = GetNewAnonymousName();
|
|
} else {
|
|
std::string::size_type idx = DefName.find("#NAME#");
|
|
if (idx != std::string::npos) {
|
|
DefName.replace(idx, 6, DefmPrefix);
|
|
} else {
|
|
// Add the suffix to the defm name to get the new name.
|
|
DefName = DefmPrefix + DefName;
|
|
}
|
|
}
|
|
|
|
Record *CurRec = new Record(DefName, DefmPrefixLoc, Records);
|
|
|
|
SubClassReference Ref;
|
|
Ref.RefLoc = DefmPrefixLoc;
|
|
Ref.Rec = DefProto;
|
|
AddSubClass(CurRec, Ref);
|
|
|
|
// 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], std::vector<unsigned>(),
|
|
TemplateVals[i]))
|
|
return true;
|
|
|
|
// Resolve it next.
|
|
CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
|
|
|
|
// Now remove it.
|
|
CurRec->removeValue(TArgs[i]);
|
|
|
|
} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
|
|
return Error(SubClassLoc,
|
|
"value not specified for template argument #"+
|
|
utostr(i) + " (" + TArgs[i] + ") of multiclassclass '" +
|
|
MC->Rec.getName() + "'");
|
|
}
|
|
}
|
|
|
|
// If the mdef is inside a 'let' expression, add to each def.
|
|
for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
|
|
for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
|
|
if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
|
|
LetStack[i][j].Bits, LetStack[i][j].Value)) {
|
|
Error(DefmPrefixLoc, "when instantiating this defm");
|
|
return true;
|
|
}
|
|
|
|
// Ensure redefinition doesn't happen.
|
|
if (Records.getDef(CurRec->getName()))
|
|
return Error(DefmPrefixLoc, "def '" + CurRec->getName() +
|
|
"' already defined, instantiating defm with subdef '" +
|
|
DefProto->getName() + "'");
|
|
|
|
// 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) {
|
|
for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size();
|
|
i != e; ++i) {
|
|
if (CurMultiClass->DefPrototypes[i]->getName() == CurRec->getName()) {
|
|
Error(DefmPrefixLoc, "defm '" + CurRec->getName() +
|
|
"' already defined in this multiclass!");
|
|
return 0;
|
|
}
|
|
}
|
|
CurMultiClass->DefPrototypes.push_back(CurRec);
|
|
|
|
// Copy the template arguments for the multiclass into the new def.
|
|
const std::vector<std::string> &TA =
|
|
CurMultiClass->Rec.getTemplateArgs();
|
|
|
|
for (unsigned i = 0, e = TA.size(); i != e; ++i) {
|
|
const RecordVal *RV = CurMultiClass->Rec.getValue(TA[i]);
|
|
assert(RV && "Template arg doesn't exist?");
|
|
CurRec->addValue(*RV);
|
|
}
|
|
} else {
|
|
Records.addDef(CurRec);
|
|
}
|
|
|
|
NewRecDefs.push_back(CurRec);
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
|
|
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()) != 0);
|
|
|
|
if (InheritFromClass)
|
|
break;
|
|
|
|
Ref = ParseSubClassReference(0, 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(0, false);
|
|
while (1) {
|
|
// Check for error.
|
|
if (SubClass.Rec == 0) return true;
|
|
|
|
// Get the expanded definition prototypes and teach them about
|
|
// the record values the current class to inherit has
|
|
for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i) {
|
|
Record *CurRec = NewRecDefs[i];
|
|
|
|
// Add it.
|
|
if (AddSubClass(CurRec, SubClass))
|
|
return true;
|
|
|
|
// Process any variables on the let stack.
|
|
for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
|
|
for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
|
|
if (SetValue(CurRec, LetStack[i][j].Loc, LetStack[i][j].Name,
|
|
LetStack[i][j].Bits, LetStack[i][j].Value))
|
|
return true;
|
|
}
|
|
|
|
if (Lex.getCode() != tgtok::comma) break;
|
|
Lex.Lex(); // eat ','.
|
|
SubClass = ParseSubClassReference(0, false);
|
|
}
|
|
}
|
|
|
|
if (!CurMultiClass)
|
|
for (unsigned i = 0, e = NewRecDefs.size(); i != e; ++i)
|
|
NewRecDefs[i]->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::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");
|
|
}
|
|
|