re PR ipa/44563 (GCC uses a lot of RAM when compiling a large numbers of functions)

re PR ipa/44563 (GCC uses a lot of RAM when compiling a large numbers of functions)

2015-03-10  Richard Biener  <rguenther@suse.de>

	PR middle-end/44563
	* tree-cfgcleanup.c (split_bb_on_noreturn_calls): Remove.
	(cleanup_tree_cfg_1): Do not call it.
	(execute_cleanup_cfg_post_optimizing): Fixup the CFG here.
	(fixup_noreturn_call): Mark the stmt as control altering.
	* tree-cfg.c (execute_fixup_cfg): Do not dump the function
	here.
	(pass_data_fixup_cfg): Produce a dump file.
	* tree-ssa-dom.c: Include tree-cfgcleanup.h.
	(need_noreturn_fixup): New global.
	(pass_dominator::execute): Fixup queued noreturn calls.
	(optimize_stmt): Queue calls that became noreturn for fixup.
	* tree-ssa-forwprop.c (pass_forwprop::execute): Likewise.
	* tree-ssa-pre.c: Include tree-cfgcleanup.h.
	(el_to_fixup): New global.
	(eliminate_dom_walker::before_dom_childre): Queue calls that
	became noreturn for fixup.
	(eliminate): Fixup queued noreturn calls.
	* tree-ssa-propagate.c: Include tree-cfgcleanup.h.
	(substitute_and_fold_dom_walker): New member stmts_to_fixup.
	(substitute_and_fold_dom_walker::before_dom_children): Queue
	alls that became noreturn for fixup.
	(substitute_and_fold): Fixup queued noreturn calls.

From-SVN: r221409