re PR rtl-optimization/59036 (Performance degradation after r204212 on 32-bit x86...

re PR rtl-optimization/59036 (Performance degradation after r204212 on 32-bit x86 targets.)

2013-11-13  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/59036
	* ira-color.c (struct allocno_color_data): Add new members
	first_thread_allocno, next_thread_allocno, thread_freq.
	(sorted_copies): New static var.
	(allocnos_conflict_by_live_ranges_p, copy_freq_compare_func): Move
	up.
	(allocno_thread_conflict_p, merge_threads)
	(form_threads_from_copies, form_threads_from_bucket)
	(form_threads_from_colorable_allocno, init_allocno_threads): New
	functions.
	(bucket_allocno_compare_func): Add comparison by thread frequency
	and threads.
	(add_allocno_to_ordered_bucket): Rename to
	add_allocno_to_ordered_colorable_bucket.  Remove parameter.
        (push_only_colorable): Call form_threads_from_bucket.
	(color_pass): Call init_allocno_threads.  Use
	consideration_allocno_bitmap instead of coloring_allocno_bitmap
	for nuillify allocno color data.
	(ira_initiate_assign, ira_finish_assign): Allocate/free
	sorted_copies.
	(coalesce_allocnos): Use static sorted copies.

From-SVN: r204752