2016-01-29  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/69299
	* config/i386/constraints.md (Bm): Describe as special memory
	constraint.
	* doc/md.texi (DEFINE_SPECIAL_MEMORY_CONSTRAINT): Describe it.
	* genoutput.c (main): Process DEFINE_SPECIAL_MEMORY_CONSTRAINT.
	* genpreds.c (struct constraint_data): Add is_special_memory.
	(have_special_memory_constraints, special_memory_start): New
	static vars.
	(special_memory_end): Ditto.
	(add_constraint): Add new arg is_special_memory.  Add code to
	process its true value.  Update have_special_memory_constraints.
	(process_define_constraint): Pass the new arg.
	(process_define_register_constraint): Ditto.
	(choose_enum_order): Process special memory.
	(write_tm_preds_h): Generate enum const CT_SPECIAL_MEMORY and
	function insn_extra_special_memory_constraint.
	(main): Process DEFINE_SPECIAL_MEMORY_CONSTRAINT.
	* gensupport.c (process_rtx): Process
	DEFINE_SPECIAL_MEMORY_CONSTRAINT.
	* ira-costs.c (record_reg_classes): Process CT_SPECIAL_MEMORY.
	* ira-lives.c (single_reg_class): Use
	insn_extra_special_memory_constraint.
	* ira.c (ira_setup_alts): Process CT_SPECIAL_MEMORY.
	* lra-constraints.c (process_alt_operands): Ditto.
	(curr_insn_transform): Use insn_extra_special_memory_constraint.
	* recog.c (asm_operand_ok, preprocess_constraints): Process
	CT_SPECIAL_MEMORY.
	* reload.c (find_reloads): Ditto.
	* rtl.def (DEFINE_SPECIFAL_MEMORY_CONSTRAINT): New.
	* stmt.c (parse_input_constraint): Use
	insn_extra_special_memory_constraint.

From-SVN: r232993