PR target/50751
	* config/sh/constraints.md (Sra): New constraint.
	* config/sh/predicates.md (simple_mem_operand,
	displacement_mem_operand, zero_extend_movu_operand): New predicates.
	(zero_extend_operand): Check zero_extend_movu_operand for SH2A.
	* config/sh/sh.md (*zero_extendqisi2_disp_mem,
	*zero_extendhisi2_disp_mem): Add new insns and two new related
	peephole2 patterns.

	PR target/50751
	* gcc.target/sh/pr50751-8.c: New.

From-SVN: r190395