+ getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const;
+
+ /// isTruncateFree - Return true if it's free to truncate a value of type
+ /// Ty1 to type Ty2. e.g. On msp430 it's free to truncate a i16 value in
+ /// register R15W to i8 by referencing its sub-register R15B.
+ virtual bool isTruncateFree(Type *Ty1, Type *Ty2) const;
+ virtual bool isTruncateFree(EVT VT1, EVT VT2) const;
+
+ /// isZExtFree - Return true if any actual instruction that defines a value
+ /// of type Ty1 implicit zero-extends the value to Ty2 in the result
+ /// register. This does not necessarily include registers defined in unknown
+ /// ways, such as incoming arguments, or copies from unknown virtual
+ /// registers. Also, if isTruncateFree(Ty2, Ty1) is true, this does not
+ /// necessarily apply to truncate instructions. e.g. on msp430, all
+ /// instructions that define 8-bit values implicit zero-extend the result
+ /// out to 16 bits.
+ virtual bool isZExtFree(Type *Ty1, Type *Ty2) const;
+ virtual bool isZExtFree(EVT VT1, EVT VT2) const;
+ virtual bool isZExtFree(SDValue Val, EVT VT2) const;