lto-cgraph.c (output_profile_summary, [...]): Use gcov streaming; stream hot bb thres...

lto-cgraph.c (output_profile_summary, [...]): Use gcov streaming; stream hot bb threshold to ltrans.

	* lto-cgraph.c (output_profile_summary, input_profile_summary): Use
	gcov streaming; stream hot bb threshold to ltrans.
	* predict.c (get_hot_bb_threshold): Break out from ....
	(maybe_hot_count_p): ... here.
	(set_hot_bb_threshold): New function.
	* lto-section-in.c (lto_section_name): Add profile.
	* profile.h (get_hot_bb_threshold, set_hot_bb_threshold): Declare.
	* ipa.c: Include hash-table.h, tree-inline.h, profile.h, lto-streamer.h
	and data-streamer.h
	(histogram_entry): New structure.
	(histogram, histogram_pool): New global vars.
	(histogram_hash): New structure.
	(histogram_hash::hash): New method.
	(histogram_hash::equal): Likewise.
	(account_time_size): New function.
	(cmp_counts): New function.
	(dump_histogram): New function.
	(ipa_profile_generate_summary): New function.
	(ipa_profile_write_summary): New function.
	(ipa_profile_read_summary): New function.
	(ipa_profile): Decide on threshold.
	(pass_ipa_profile): Add ipa_profile_write_summary and ipa_profile_read_summary.
	* Makefile.in (ipa.o): Update dependencies.
	* lto-streamer.h (LTO_section_ipa_profile): New section.

From-SVN: r197243