};
class TargetRegisterClass {
-protected:
- TargetRegisterClass() {}
-
public:
+ typedef const unsigned* iterator;
+ typedef const unsigned* const_iterator;
- typedef unsigned* iterator;
- typedef unsigned* const_iterator;
+private:
+ const unsigned RegSize; // Size of register in bytes
+ const iterator RegsBegin, RegsEnd;
+public:
+ TargetRegisterClass(unsigned RS, iterator RB, iterator RE)
+ : RegSize(RS), RegsBegin(RB), RegsEnd(RE) {}
+ virtual ~TargetRegisterClass() {} // Allow subclasses
- iterator begin();
- iterator end();
- const_iterator begin() const;
- const_iterator end() const;
+ iterator begin() const { return RegsBegin; }
+ iterator end() const { return RegsEnd; }
- virtual unsigned getNumRegs() const { return 0; }
- virtual unsigned getRegister(unsigned idx) const { return 0; }
+ unsigned getNumRegs() const { return RegsEnd-RegsBegin; }
+ unsigned getRegister(unsigned i) const {
+ assert(i < getNumRegs() && "Register number out of range!");
+ return RegsBegin[i];
+ }
- virtual unsigned getDataSize() const { return 0; }
+ unsigned getDataSize() const { return RegSize; }
- //const std::vector<unsigned> &getRegsInClass(void) { return Regs; }
//void getAliases(void);
};
virtual unsigned getStackPointer() const = 0;
/// Register class iterators
- typedef const TargetRegisterClass** const_iterator;
+ typedef const TargetRegisterClass * const * const_iterator;
virtual const_iterator regclass_begin() const = 0;
virtual const_iterator regclass_end() const = 0;