+ /// getMatchingSuperRegClass - Return a subclass of the specified register
+ /// class A so that each register in it has a sub-register of the
+ /// specified sub-register index which is in the specified register class B.
+ virtual const TargetRegisterClass *
+ getMatchingSuperRegClass(const TargetRegisterClass *A,
+ const TargetRegisterClass *B, unsigned Idx) const;
+
+ /// canCombineSubRegIndices - Given a register class and a list of
+ /// subregister indices, return true if it's possible to combine the
+ /// subregister indices into one that corresponds to a larger
+ /// subregister. Return the new subregister index by reference. Note the
+ /// new index may be zero if the given subregisters can be combined to
+ /// form the whole register.
+ virtual bool canCombineSubRegIndices(const TargetRegisterClass *RC,
+ SmallVectorImpl<unsigned> &SubIndices,
+ unsigned &NewSubIdx) const;
+
+ const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) const;