Extend special_memory_constraint.

Extend special_memory_constraint.

For operand with special_memory_constraint, there could be a wrapper
for memory_operand. Extract mem for operand for conditional judgement
like MEM_P, also for record_address_regs.

gcc/ChangeLog:

	PR target/87767
	* ira-costs.c (record_operand_costs): Extract memory operand
	from recog_data.operand[i] for record_address_regs.
	(record_reg_classes): Extract memory operand from OP for
	conditional judgement MEM_P.
	* ira.c (ira_setup_alts): Ditto.
	* lra-constraints.c (extract_mem_from_operand): New function.
	(satisfies_memory_constraint_p): Extract memory operand from
	OP for decompose_mem_address, return false when there's no
	memory operand inside OP.
	(process_alt_operands): Remove MEM_P (op) since it would be
	judged in satisfies_memory_constraint_p.
	* recog.c (asm_operand_ok): Extract memory operand from OP for
	judgement of memory_operand (OP, VOIDmode).
	(constrain_operands): Don't unwrapper unary operator when
	there's memory operand inside.
	* rtl.h (extract_mem_from_operand): New decl.