gcc/
	* system.h (TEST_BIT): New macro.
	* recog.h (alternative_mask): New type.
	(ALL_ALTERNATIVES, ALTERNATIVE_BIT): New macros.
	(recog_data_d): Replace alternative_enabled_p array with
	enabled_alternatives.
	(target_recog): New structure.
	(default_target_recog, this_target_recog): Declare.
	(get_enabled_alternatives, recog_init): Likewise.
	* recog.c (default_target_recog, this_target_recog): New variables.
	(get_enabled_alternatives): New function.
	(extract_insn): Use it.
	(recog_init): New function.
	(preprocess_constraints, constrain_operands): Adjust for change to
	recog_data.
	* postreload.c (reload_cse_simplify_operands): Likewise.
	* reload.c (find_reloads): Likewise.
	* ira-costs.c (record_reg_classes): Likewise.
	* ira-lives.c (single_reg_class): Likewise.  Fix bug in which
	all alternatives after a disabled one would be skipped.
	(ira_implicitly_set_insn_hard_regs): Likewise.
	* ira.c (ira_setup_alts): Adjust for change to recog_data.
	* lra-int.h (lra_insn_recog_data): Replace alternative_enabled_p
	with enabled_alternatives.
	* lra.c (free_insn_recog_data): Update accordingly.
	(lra_update_insn_recog_data): Likewise.
	(lra_set_insn_recog_data): Likewise.  Use get_enabled_alternatives.
	* lra-constraints.c (process_alt_operands): Likewise.  Handle
	only_alternative as part of the enabled mask.
	* target-globals.h (this_target_recog): Declare.
	(target_globals): Add a recog field.
	(restore_target_globals): Restore this_target_recog.
	* target-globals.c: Include recog.h.
	(default_target_globals): Initialize recog field.
	(save_target_globals): Likewise.
	* reginfo.c (reinit_regs): Call recog_init.
	* toplev.c (backend_init_target): Likewise.

From-SVN: r210964