i386.md (movstrict<mode>): Use register_operand predicate for operand 0.

i386.md (movstrict<mode>): Use register_operand predicate for operand 0.

	* config/i386/i386.md (movstrict<mode>): Use register_operand
	predicate for operand 0.  Add expander condition.  Assert that
	operand 0 is a SUBREG RTX.
	(*movstrict<mode>_1): Use register_operand predicate for operand 0.
	Update operand constraints and insn condition.
	(zero_extend<mode>si2_and): Do not call gen_movstrict<mode>.
	(zero_extendqihi2_and): Do not call gen_movstrictqi.
	(*setcc_qi_slp): Use register_operand predicate for operand 0.
	Update operand 0 constraints.
	(setcc_qi_slp splitters): Use register_operand predicate for operand 0.

From-SVN: r273891