+ const std::vector<CodeGenRegister> &getRegisters() const {
+ if (Registers.empty()) ReadRegisters();
+ return Registers;
+ }
+
+ const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
+ if (RegisterClasses.empty()) ReadRegisterClasses();
+ return RegisterClasses;
+ }
+
+ const CodeGenRegisterClass &getRegisterClass(Record *R) const {
+ const std::vector<CodeGenRegisterClass> &RC = getRegisterClasses();
+ for (unsigned i = 0, e = RC.size(); i != e; ++i)
+ if (RC[i].TheDef == R)
+ return RC[i];
+ assert(0 && "Didn't find the register class");
+ abort();
+ }
+
+ /// getRegisterClassForRegister - Find the register class that contains the
+ /// specified physical register. If the register is not in a register
+ /// class, return null. If the register is in multiple classes, and the
+ /// classes have a superset-subset relationship and the same set of
+ /// types, return the superclass. Otherwise return null.
+ const CodeGenRegisterClass *getRegisterClassForRegister(Record *R) const {
+ const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
+ const CodeGenRegisterClass *FoundRC = 0;
+ for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
+ const CodeGenRegisterClass &RC = RegisterClasses[i];
+ for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
+ if (R != RC.Elements[ei])
+ continue;
+
+ // If a register's classes have different types, return null.
+ if (FoundRC && RC.getValueTypes() != FoundRC->getValueTypes())
+ return 0;
+
+ // If this is the first class that contains the register,
+ // make a note of it and go on to the next class.
+ if (!FoundRC) {
+ FoundRC = &RC;
+ break;
+ }
+
+ std::vector<Record *> Elements(RC.Elements);
+ std::vector<Record *> FoundElements(FoundRC->Elements);
+ std::sort(Elements.begin(), Elements.end());
+ std::sort(FoundElements.begin(), FoundElements.end());
+
+ // Check to see if the previously found class that contains
+ // the register is a subclass of the current class. If so,
+ // prefer the superclass.
+ if (std::includes(Elements.begin(), Elements.end(),
+ FoundElements.begin(), FoundElements.end())) {
+ FoundRC = &RC;
+ break;
+ }
+
+ // Check to see if the previously found class that contains
+ // the register is a superclass of the current class. If so,
+ // prefer the superclass.
+ if (std::includes(FoundElements.begin(), FoundElements.end(),
+ Elements.begin(), Elements.end()))
+ break;
+
+ // Multiple classes, and neither is a superclass of the other.
+ // Return null.
+ return 0;
+ }
+ }
+ return FoundRC;
+ }
+
+ /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the
+ /// specified physical register.
+ std::vector<unsigned char> getRegisterVTs(Record *R) const;
+
+ const std::vector<MVT::SimpleValueType> &getLegalValueTypes() const {
+ if (LegalValueTypes.empty()) ReadLegalValueTypes();
+ return LegalValueTypes;
+ }
+
+ /// isLegalValueType - Return true if the specified value type is natively
+ /// supported by the target (i.e. there are registers that directly hold it).
+ bool isLegalValueType(MVT::SimpleValueType VT) const {
+ const std::vector<MVT::SimpleValueType> &LegalVTs = getLegalValueTypes();
+ for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
+ if (LegalVTs[i] == VT) return true;
+ return false;
+ }