* basic-block.h (CLEANUP_PRE_LOOP): New.

	* basic-block.h (CLEANUP_PRE_LOOP): New.
	* except.c (finish_eh_generation): Update call of cleanup_cfg.
	* sibcall.c (optimize_sibling_calls): Likewise.
	* toplev.c (rest_of_compilation): Likewise.
	* flow.c (try_forward_edges): Take argument MODE;
	do not forward over loop pre-headers if CLEANUP_PRE_LOOP.
	(try_optimize_cfg): Update call of try_forward_edges.

	* (validate_replace_rtx_1): Fix simplification of MINUS.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@44458 138bc75d-0d04-0410-961f-82ee72b054a4