* target.def (class_likely_spilled_p): New hook.
	* doc/tm.texi.in (TARGET_CLASS_LIKELY_SPILLED_P): Document.
	* doc/tm.texi: Regenerate.
	* targhooks.c (default_class_likely_spilled_p): New function.
	* targhooks.h (default_class_likely_spilled_p): Declare.
	* regs.h (CLASS_LIKELY_SPILLED_P): Remove.
	* combine.c: (cant_combine_insn_p, likely_spilled_retval_p): Use
	TARGET_CLASS_LIKELY_SPILLED_P target hook. Use HARD_REGISTER_P macro.
	Use fixed_reg_set instead of fixed_regs.
	* cse.c (hash_rtx_cb): Use TARGET_CLASS_LIKELY_SPILLED_P target hook.
	* calls.c (avoid_likely_spilled_reg): Ditto.
	* ira-conflicts.c: (ira_build_conflicts): Ditto.
	* ira.c (update_equiv_regs): Ditto.
	* mode-switching.c (create_pre_exit): Ditto.
	* regmove.c (find_matches): Ditto.
	(regclass_compatible_p): Use TARGET_CLASS_LIKELY_SPILLED_P target
	hook.
	* reload.c (SMALL_REGISTER_CLASS_P): Remove macro.
	(small_register_class_p): New inline function.
	(push_secondary_reload, find_reusable_reload, find_reloads): Use
	small_register_class_p instead of SMALL_REGISTER_CLASS_P.

	* config/i386/i386.h (CLASS_LIKELY_SPILLED_P): Remove.
	* config/i386/i386.c (ix86_class_likely_spilled_p): New.
	(TARGET_CLASS_LIKELY_SPILLED_P): Define.

From-SVN: r163779