* basic-block.h (rtl_bb_info): Break out head_, end_,

	* basic-block.h (rtl_bb_info): Break out head_, end_,
	global_live_at_start, global_live_at_end from ...
	(basic_block_def): ... here; update all references
	(BB_RTL): New flag.
	(init_rtl_bb_info): Declare.
	* cfgexpand.c (expand_gimple_basic_block): Init bb info, set BB_RTL
	flag.
	* cfgrtl.c: Include ggc.h
	(create_basic_block_structure): Init bb info.
	(rtl_verify_flow_info_1): Check BB_RTL flag and rtl_bb_info pointer.
	(init_rtl_bb_info): New function.
	(rtl_merge_block, cfglayout_merge_block): Copy global_live_at_end here.
	* cfghooks.c (merge_block): Do not copy global_live_at_end here.
	* cfg.c (clear_bb_flags): Skip BB_RTL flag.
	(dump_flow_info): Gueard global_live_* dumping.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@101082 138bc75d-0d04-0410-961f-82ee72b054a4