forked from OSchip/llvm-project
1381 lines
42 KiB
C++
1381 lines
42 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 <algorithm>
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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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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 MultiClass {
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Record Rec; // Placeholder for template args and Name.
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std::vector<Record*> DefPrototypes;
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MultiClass(const std::string &Name) : Rec(Name) {}
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};
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struct SubClassReference {
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TGParser::LocTy RefLoc;
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Record *Rec;
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std::vector<Init*> TemplateArgs;
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SubClassReference() : RefLoc(0), Rec(0) {}
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bool isInvalid() const { return Rec == 0; }
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};
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} // end namespace llvm
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bool TGParser::AddValue(Record *CurRec, LocTy 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, LocTy 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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//===----------------------------------------------------------------------===//
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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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/// 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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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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static unsigned AnonCounter = 0;
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return "anonymous."+utostr(AnonCounter++);
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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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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);
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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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/// 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 '>'
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/// OptionalRangeList ::= /*empty*/
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bool TGParser::ParseOptionalRangeList(std::vector<unsigned> &Ranges) {
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if (Lex.getCode() != tgtok::less)
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return false;
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LocTy StartLoc = Lex.getLoc();
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Lex.Lex(); // eat the '<'
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// Parse the range list.
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Ranges = ParseRangeList();
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if (Ranges.empty()) return true;
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if (Lex.getCode() != tgtok::greater) {
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TokError("expected '>' at end of range list");
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return Error(StartLoc, "to match this '<'");
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}
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Lex.Lex(); // eat the '>'.
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return false;
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}
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/// ParseOptionalBitList - Parse either a bit list in {}'s or nothing.
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/// OptionalBitList ::= '{' RangeList '}'
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/// OptionalBitList ::= /*empty*/
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bool TGParser::ParseOptionalBitList(std::vector<unsigned> &Ranges) {
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if (Lex.getCode() != tgtok::l_brace)
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return false;
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LocTy StartLoc = Lex.getLoc();
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Lex.Lex(); // eat the '{'
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// Parse the range list.
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Ranges = ParseRangeList();
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if (Ranges.empty()) return true;
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if (Lex.getCode() != tgtok::r_brace) {
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TokError("expected '}' at end of bit list");
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return Error(StartLoc, "to match this '{'");
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}
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Lex.Lex(); // eat the '}'.
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return false;
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}
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/// ParseType - Parse and return a tblgen type. This returns null on error.
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///
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/// Type ::= STRING // string type
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/// Type ::= BIT // bit type
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/// Type ::= BITS '<' INTVAL '>' // bits<x> type
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/// Type ::= INT // int type
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/// Type ::= LIST '<' Type '>' // list<x> type
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/// Type ::= CODE // code type
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/// Type ::= DAG // dag type
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/// Type ::= ClassID // Record Type
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///
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RecTy *TGParser::ParseType() {
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switch (Lex.getCode()) {
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default: TokError("Unknown token when expecting a type"); return 0;
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case tgtok::String: Lex.Lex(); return new StringRecTy();
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case tgtok::Bit: Lex.Lex(); return new BitRecTy();
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case tgtok::Int: Lex.Lex(); return new IntRecTy();
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case tgtok::Code: Lex.Lex(); return new CodeRecTy();
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case tgtok::Dag: Lex.Lex(); return new DagRecTy();
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case tgtok::Id:
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if (Record *R = ParseClassID()) return new RecordRecTy(R);
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return 0;
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case tgtok::Bits: {
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if (Lex.Lex() != tgtok::less) { // Eat 'bits'
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TokError("expected '<' after bits type");
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return 0;
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}
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if (Lex.Lex() != tgtok::IntVal) { // Eat '<'
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TokError("expected integer in bits<n> type");
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return 0;
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}
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uint64_t Val = Lex.getCurIntVal();
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if (Lex.Lex() != tgtok::greater) { // Eat count.
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TokError("expected '>' at end of bits<n> type");
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return 0;
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}
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Lex.Lex(); // Eat '>'
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return new BitsRecTy(Val);
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}
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case tgtok::List: {
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if (Lex.Lex() != tgtok::less) { // Eat 'bits'
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TokError("expected '<' after list type");
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return 0;
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}
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Lex.Lex(); // Eat '<'
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RecTy *SubType = ParseType();
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if (SubType == 0) return 0;
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if (Lex.getCode() != tgtok::greater) {
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TokError("expected '>' at end of list<ty> type");
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return 0;
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}
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Lex.Lex(); // Eat '>'
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return new ListRecTy(SubType);
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}
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}
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}
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/// ParseIDValue - Parse an ID as a value and decode what it means.
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///
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/// IDValue ::= ID [def local value]
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/// IDValue ::= ID [def template arg]
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/// IDValue ::= ID [multiclass local value]
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/// IDValue ::= ID [multiclass template argument]
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/// IDValue ::= ID [def name]
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///
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Init *TGParser::ParseIDValue(Record *CurRec) {
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assert(Lex.getCode() == tgtok::Id && "Expected ID in ParseIDValue");
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std::string Name = Lex.getCurStrVal();
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LocTy Loc = Lex.getLoc();
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Lex.Lex();
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return ParseIDValue(CurRec, Name, Loc);
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}
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/// ParseIDValue - This is just like ParseIDValue above, but it assumes the ID
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/// has already been read.
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Init *TGParser::ParseIDValue(Record *CurRec,
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const std::string &Name, LocTy NameLoc) {
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if (CurRec) {
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if (const RecordVal *RV = CurRec->getValue(Name))
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return new VarInit(Name, RV->getType());
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std::string TemplateArgName = CurRec->getName()+":"+Name;
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if (CurRec->isTemplateArg(TemplateArgName)) {
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const RecordVal *RV = CurRec->getValue(TemplateArgName);
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assert(RV && "Template arg doesn't exist??");
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return new VarInit(TemplateArgName, RV->getType());
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}
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}
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if (CurMultiClass) {
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std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
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if (CurMultiClass->Rec.isTemplateArg(MCName)) {
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const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
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assert(RV && "Template arg doesn't exist??");
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return new VarInit(MCName, RV->getType());
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}
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}
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if (Record *D = Records.getDef(Name))
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return new DefInit(D);
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Error(NameLoc, "Variable not defined: '" + Name + "'");
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return 0;
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}
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/// ParseSimpleValue - Parse a tblgen value. This returns null on error.
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///
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/// SimpleValue ::= IDValue
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/// SimpleValue ::= INTVAL
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/// SimpleValue ::= STRVAL
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/// SimpleValue ::= CODEFRAGMENT
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/// SimpleValue ::= '?'
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/// SimpleValue ::= '{' ValueList '}'
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/// SimpleValue ::= ID '<' ValueListNE '>'
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/// SimpleValue ::= '[' ValueList ']'
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/// SimpleValue ::= '(' IDValue DagArgList ')'
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/// SimpleValue ::= CONCATTOK '(' Value ',' Value ')'
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/// SimpleValue ::= SHLTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SRATOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= SRLTOK '(' Value ',' Value ')'
|
|
/// SimpleValue ::= STRCONCATTOK '(' Value ',' Value ')'
|
|
///
|
|
Init *TGParser::ParseSimpleValue(Record *CurRec) {
|
|
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: R = new StringInit(Lex.getCurStrVal()); Lex.Lex(); break;
|
|
case tgtok::CodeFragment:
|
|
R = new CodeInit(Lex.getCurStrVal()); Lex.Lex(); break;
|
|
case tgtok::question: R = new UnsetInit(); Lex.Lex(); break;
|
|
case tgtok::Id: {
|
|
LocTy 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;
|
|
}
|
|
std::vector<Init*> ValueList = ParseValueList(CurRec);
|
|
if (ValueList.empty()) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::greater) {
|
|
TokError("expected '>' at end of value list");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '>'
|
|
|
|
// 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;
|
|
}
|
|
|
|
// Create the new record, set it as CurRec temporarily.
|
|
static unsigned AnonCounter = 0;
|
|
Record *NewRec = new Record("anonymous.val."+utostr(AnonCounter++));
|
|
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 '}'
|
|
LocTy 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;
|
|
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
Vals = ParseValueList(CurRec);
|
|
if (Vals.empty()) return 0;
|
|
}
|
|
if (Lex.getCode() != tgtok::r_square) {
|
|
TokError("expected ']' at end of list value");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the ']'
|
|
return new ListInit(Vals);
|
|
}
|
|
case tgtok::l_paren: { // Value ::= '(' IDValue DagArgList ')'
|
|
Lex.Lex(); // eat the '('
|
|
if (Lex.getCode() != tgtok::Id) {
|
|
TokError("expected identifier in dag init");
|
|
return 0;
|
|
}
|
|
|
|
Init *Operator = ParseIDValue(CurRec);
|
|
if (Operator == 0) return 0;
|
|
|
|
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, DagArgs);
|
|
}
|
|
case tgtok::XConcat:
|
|
case tgtok::XSRA:
|
|
case tgtok::XSRL:
|
|
case tgtok::XSHL:
|
|
case tgtok::XStrConcat: { // Value ::= !binop '(' Value ',' Value ')'
|
|
BinOpInit::BinaryOp Code;
|
|
switch (Lex.getCode()) {
|
|
default: assert(0 && "Unhandled code!");
|
|
case tgtok::XConcat: Code = BinOpInit::CONCAT; break;
|
|
case tgtok::XSRA: Code = BinOpInit::SRA; break;
|
|
case tgtok::XSRL: Code = BinOpInit::SRL; break;
|
|
case tgtok::XSHL: Code = BinOpInit::SHL; break;
|
|
case tgtok::XStrConcat: Code = BinOpInit::STRCONCAT; break;
|
|
}
|
|
Lex.Lex(); // eat the operation
|
|
if (Lex.getCode() != tgtok::l_paren) {
|
|
TokError("expected '(' after binary operator");
|
|
return 0;
|
|
}
|
|
Lex.Lex(); // eat the '('
|
|
|
|
Init *LHS = ParseValue(CurRec);
|
|
if (LHS == 0) return 0;
|
|
|
|
if (Lex.getCode() != tgtok::comma) {
|
|
TokError("expected ',' in binary 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 ')'
|
|
return (new BinOpInit(Code, LHS, RHS))->Fold();
|
|
}
|
|
}
|
|
|
|
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) {
|
|
Init *Result = ParseSimpleValue(CurRec);
|
|
if (Result == 0) return 0;
|
|
|
|
// Parse the suffixes now if present.
|
|
while (1) {
|
|
switch (Lex.getCode()) {
|
|
default: return Result;
|
|
case tgtok::l_brace: {
|
|
LocTy 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: {
|
|
LocTy 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) {
|
|
std::vector<Init*> Result;
|
|
Result.push_back(ParseValue(CurRec));
|
|
if (Result.back() == 0) return std::vector<Init*>();
|
|
|
|
while (Lex.getCode() == tgtok::comma) {
|
|
Lex.Lex(); // Eat the comma
|
|
|
|
Result.push_back(ParseValue(CurRec));
|
|
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 "";
|
|
}
|
|
|
|
LocTy 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();
|
|
LocTy ValLoc = Lex.getLoc();
|
|
Init *Val = ParseValue(CurRec);
|
|
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");
|
|
|
|
LocTy 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 '='.
|
|
|
|
Init *Val = ParseValue(CurRec);
|
|
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
|
|
///
|
|
llvm::Record *TGParser::ParseDef(MultiClass *CurMultiClass) {
|
|
LocTy 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());
|
|
|
|
if (!CurMultiClass) {
|
|
// Top-level def definition.
|
|
|
|
// Ensure redefinition doesn't happen.
|
|
if (Records.getDef(CurRec->getName())) {
|
|
Error(DefLoc, "def '" + CurRec->getName() + "' already defined");
|
|
return 0;
|
|
}
|
|
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 0;
|
|
}
|
|
CurMultiClass->DefPrototypes.push_back(CurRec);
|
|
}
|
|
|
|
if (ParseObjectBody(CurRec))
|
|
return 0;
|
|
|
|
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?");
|
|
return CurRec;
|
|
}
|
|
|
|
|
|
/// 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());
|
|
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();
|
|
LocTy 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.
|
|
///
|
|
/// Object ::= LET LetList IN '{' ObjectList '}'
|
|
/// Object ::= LET LetList IN Object
|
|
///
|
|
bool TGParser::ParseTopLevelLet() {
|
|
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())
|
|
return true;
|
|
} else { // Object ::= LETCommand '{' ObjectList '}'
|
|
LocTy BraceLoc = Lex.getLoc();
|
|
// Otherwise, this is a group let.
|
|
Lex.Lex(); // eat the '{'.
|
|
|
|
// Parse the object list.
|
|
if (ParseObjectList())
|
|
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;
|
|
}
|
|
|
|
/// ParseMultiClassDef - Parse a def in a multiclass context.
|
|
///
|
|
/// MultiClassDef ::= DefInst
|
|
///
|
|
bool TGParser::ParseMultiClassDef(MultiClass *CurMC) {
|
|
if (Lex.getCode() != tgtok::Def)
|
|
return TokError("expected 'def' in multiclass body");
|
|
|
|
Record *D = ParseDef(CurMC);
|
|
if (D == 0) return true;
|
|
|
|
// Copy the template arguments for the multiclass into the def.
|
|
const std::vector<std::string> &TArgs = CurMC->Rec.getTemplateArgs();
|
|
|
|
for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
|
|
const RecordVal *RV = CurMC->Rec.getValue(TArgs[i]);
|
|
assert(RV && "Template arg doesn't exist?");
|
|
D->addValue(*RV);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseMultiClass - Parse a multiclass definition.
|
|
///
|
|
/// MultiClassInst ::= MULTICLASS ID TemplateArgList? '{' 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.Lex(); // Eat the identifier.
|
|
|
|
// If there are template args, parse them.
|
|
if (Lex.getCode() == tgtok::less)
|
|
if (ParseTemplateArgList(0))
|
|
return true;
|
|
|
|
if (Lex.getCode() != tgtok::l_brace)
|
|
return TokError("expected '{' in multiclass definition");
|
|
|
|
if (Lex.Lex() == tgtok::r_brace) // eat the '{'.
|
|
return TokError("multiclass must contain at least one def");
|
|
|
|
while (Lex.getCode() != tgtok::r_brace)
|
|
if (ParseMultiClassDef(CurMultiClass))
|
|
return true;
|
|
|
|
Lex.Lex(); // eat the '}'.
|
|
|
|
CurMultiClass = 0;
|
|
return false;
|
|
}
|
|
|
|
/// ParseDefm - Parse the instantiation of a multiclass.
|
|
///
|
|
/// DefMInst ::= DEFM ID ':' DefmSubClassRef ';'
|
|
///
|
|
bool TGParser::ParseDefm() {
|
|
assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
|
|
if (Lex.Lex() != tgtok::Id) // eat the defm.
|
|
return TokError("expected identifier after defm");
|
|
|
|
LocTy DefmPrefixLoc = Lex.getLoc();
|
|
std::string DefmPrefix = Lex.getCurStrVal();
|
|
if (Lex.Lex() != tgtok::colon)
|
|
return TokError("expected ':' after defm identifier");
|
|
|
|
// eat the colon.
|
|
Lex.Lex();
|
|
|
|
LocTy SubClassLoc = Lex.getLoc();
|
|
SubClassReference Ref = ParseSubClassReference(0, true);
|
|
if (Ref.Rec == 0) return true;
|
|
|
|
if (Lex.getCode() != tgtok::semi)
|
|
return TokError("expected ';' at end of defm");
|
|
Lex.Lex();
|
|
|
|
// 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 the suffix to the defm name to get the new name.
|
|
Record *CurRec = new Record(DefmPrefix + DefProto->getName());
|
|
|
|
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) {
|
|
if (i < TemplateVals.size()) { // A value is specified for this temp-arg?
|
|
// 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() + "'");
|
|
Records.addDef(CurRec);
|
|
CurRec->resolveReferences();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseObject
|
|
/// Object ::= ClassInst
|
|
/// Object ::= DefInst
|
|
/// Object ::= MultiClassInst
|
|
/// Object ::= DefMInst
|
|
/// Object ::= LETCommand '{' ObjectList '}'
|
|
/// Object ::= LETCommand Object
|
|
bool TGParser::ParseObject() {
|
|
switch (Lex.getCode()) {
|
|
default: assert(0 && "This is not an object");
|
|
case tgtok::Let: return ParseTopLevelLet();
|
|
case tgtok::Def: return ParseDef(0) == 0;
|
|
case tgtok::Defm: return ParseDefm();
|
|
case tgtok::Class: return ParseClass();
|
|
case tgtok::MultiClass: return ParseMultiClass();
|
|
}
|
|
}
|
|
|
|
/// ParseObjectList
|
|
/// ObjectList :== Object*
|
|
bool TGParser::ParseObjectList() {
|
|
while (isObjectStart(Lex.getCode())) {
|
|
if (ParseObject())
|
|
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");
|
|
}
|
|
|