i386.c (memory_address_length): Extract a part of code to rip_relative_addr_p.

i386.c (memory_address_length): Extract a part of code to rip_relative_addr_p.

2013-11-04  Wei Mi  <wmi@google.com>

	* gcc/config/i386/i386.c (memory_address_length): Extract a part
	of code to rip_relative_addr_p.
	(rip_relative_addr_p): New Function.
	(ix86_macro_fusion_p): Ditto.
	(ix86_macro_fusion_pair_p): Ditto.
	* gcc/config/i386/i386.h: Add new tune features about macro-fusion.
	* gcc/config/i386/x86-tune.def (DEF_TUNE): Ditto.
	* gcc/doc/tm.texi: Generated.
	* gcc/doc/tm.texi.in: Ditto.
	* gcc/haifa-sched.c (try_group_insn): New Function.
	(group_insns_for_macro_fusion): Ditto.
	(sched_init): Call group_insns_for_macro_fusion.
	* gcc/target.def: Add two hooks: macro_fusion_p and
	macro_fusion_pair_p.

From-SVN: r204369