+Record *TGParser::
+InstantiateMulticlassDef(MultiClass &MC,
+ Record *DefProto,
+ Init *DefmPrefix,
+ SMLoc DefmPrefixLoc) {
+ // We need to preserve DefProto so it can be reused for later
+ // instantiations, so create a new Record to inherit from it.
+
+ // Add in the defm name. If the defm prefix is empty, give each
+ // instantiated def a unique name. Otherwise, if "#NAME#" exists in the
+ // name, substitute the prefix for #NAME#. Otherwise, use the defm name
+ // as a prefix.
+
+ if (DefmPrefix == 0)
+ DefmPrefix = StringInit::get(GetNewAnonymousName());
+
+ Init *DefName = DefProto->getNameInit();
+
+ StringInit *DefNameString = dynamic_cast<StringInit *>(DefName);
+
+ if (DefNameString != 0) {
+ // We have a fully expanded string so there are no operators to
+ // resolve. We should concatenate the given prefix and name.
+ DefName =
+ BinOpInit::get(BinOpInit::STRCONCAT,
+ UnOpInit::get(UnOpInit::CAST, DefmPrefix,
+ StringRecTy::get())->Fold(DefProto, &MC),
+ DefName, StringRecTy::get())->Fold(DefProto, &MC);
+ }
+
+ Record *CurRec = new Record(DefName, DefmPrefixLoc, Records);
+
+ SubClassReference Ref;
+ Ref.RefLoc = DefmPrefixLoc;
+ Ref.Rec = DefProto;
+ AddSubClass(CurRec, Ref);
+
+ if (DefNameString == 0) {
+ // We must resolve references to NAME.
+ if (SetValue(CurRec, Ref.RefLoc, "NAME", std::vector<unsigned>(),
+ DefmPrefix)) {
+ Error(DefmPrefixLoc, "Could not resolve "
+ + CurRec->getNameInitAsString() + ":NAME to '"
+ + DefmPrefix->getAsUnquotedString() + "'");
+ return 0;
+ }
+
+ RecordVal *DefNameRV = CurRec->getValue("NAME");
+ CurRec->resolveReferencesTo(DefNameRV);
+ }
+
+ if (!CurMultiClass) {
+ // We do this after resolving NAME because before resolution, many
+ // multiclass defs will have the same name expression. If we are
+ // currently in a multiclass, it means this defm appears inside a
+ // multiclass and its name won't be fully resolvable until we see
+ // the top-level defm. Therefore, we don't add this to the
+ // RecordKeeper at this point. If we did we could get duplicate
+ // defs as more than one probably refers to NAME or some other
+ // common internal placeholder.
+
+ // Ensure redefinition doesn't happen.
+ if (Records.getDef(CurRec->getNameInitAsString())) {
+ Error(DefmPrefixLoc, "def '" + CurRec->getNameInitAsString() +
+ "' already defined, instantiating defm with subdef '" +
+ DefProto->getNameInitAsString() + "'");
+ return 0;
+ }
+
+ Records.addDef(CurRec);
+ }
+
+ return CurRec;
+}
+
+bool TGParser::ResolveMulticlassDefArgs(MultiClass &MC,
+ Record *CurRec,
+ SMLoc DefmPrefixLoc,
+ SMLoc SubClassLoc,
+ const std::vector<Init *> &TArgs,
+ std::vector<Init *> &TemplateVals,
+ bool DeleteArgs) {
+ // Loop over all of the template arguments, setting them to the specified
+ // value or leaving them as the default if necessary.
+ for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
+ // Check if a value is specified for this temp-arg.
+ if (i < TemplateVals.size()) {
+ // Set it now.
+ if (SetValue(CurRec, DefmPrefixLoc, TArgs[i], std::vector<unsigned>(),
+ TemplateVals[i]))
+ return true;
+
+ // Resolve it next.
+ CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
+
+ if (DeleteArgs)
+ // Now remove it.
+ CurRec->removeValue(TArgs[i]);
+
+ } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
+ return Error(SubClassLoc, "value not specified for template argument #"+
+ utostr(i) + " (" + TArgs[i]->getAsUnquotedString()
+ + ") of multiclassclass '" + MC.Rec.getNameInitAsString()
+ + "'");
+ }
+ }
+ return false;
+}
+
+bool TGParser::ResolveMulticlassDef(MultiClass &MC,
+ Record *CurRec,
+ Record *DefProto,
+ SMLoc DefmPrefixLoc) {
+ // If the mdef is inside a 'let' expression, add to each def.
+ 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 Error(DefmPrefixLoc, "when instantiating this defm");
+
+ // Don't create a top level definition for defm inside multiclasses,
+ // instead, only update the prototypes and bind the template args
+ // with the new created definition.
+ if (CurMultiClass) {
+ for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size();
+ i != e; ++i)
+ if (CurMultiClass->DefPrototypes[i]->getNameInit()
+ == CurRec->getNameInit())
+ return Error(DefmPrefixLoc, "defm '" + CurRec->getNameInitAsString() +
+ "' already defined in this multiclass!");
+ CurMultiClass->DefPrototypes.push_back(CurRec);
+
+ // Copy the template arguments for the multiclass into the new def.
+ const std::vector<Init *> &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);
+ }
+ }
+
+ return false;
+}
+