+void CodeGenTarget::ReadRegisterClasses() const {
+ std::vector<Record*> RegClasses =
+ Records.getAllDerivedDefinitions("RegisterClass");
+ if (RegClasses.empty())
+ throw std::string("No 'RegisterClass' subclasses defined!");
+
+ RegisterClasses.reserve(RegClasses.size());
+ RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
+}
+
+CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
+ SpillSize = R->getValueAsInt("Size");
+ SpillAlignment = R->getValueAsInt("Alignment");
+
+ ListInit *RegList = R->getValueAsListInit("MemberList");
+ for (unsigned i = 0, e = RegList->getSize(); i != e; ++i) {
+ DefInit *RegDef = dynamic_cast<DefInit*>(RegList->getElement(i));
+ if (!RegDef) throw "Register class member is not a record!";
+ Record *Reg = RegDef->getDef();
+
+ if (!Reg->isSubClassOf("Register"))
+ throw "Register Class member '" + Reg->getName() +
+ "' does not derive from the Register class!";
+ Elements.push_back(Reg);
+ }
+}
+
+const std::string &CodeGenRegisterClass::getName() const {
+ return TheDef->getName();
+}
+
+