[PATCH] [PR tree-optimization/69347] Fix memory consumption in threader & minor speed...

[PATCH] [PR tree-optimization/69347] Fix memory consumption in threader & minor speed improvement

	PR middle-end/69347
	* tree-ssa-dom.c (dom_opt_dom_walker::thread_across_edge): Avoid
	useless call to record_temporary_equivalences.
	* tree-ssa-threadbackward.c (find_jump_threads_backwards): Just
	allocate 10 slots in the bb_path vector and let it grow as needed.
	(fsm_find_control_statement_thread_paths): Similarly for the next_path
	vector.

From-SVN: r232711