* cfgcleanup.c (outgoing_edges_math): Fix condition; relax

	* cfgcleanup.c (outgoing_edges_math): Fix condition; relax
	frequencies match; avoid match on different loop depths.
	(try_crossjump_to_bb): Kill tests that no longer brings time
	savings.
	* cfgrtl.c (force_nonfallthru_and_redirect): Fix loop_depth
	updating code.
	(split_edge): Likewise.

	* flow.c (update_life_info_in_dirty_blocks): Fix uninitialized
	variable.

	* Makefile.in (cfgrtl): Add insn-config.h depenendency.
	* cfgrtl.c: Include insn-config.h
	(split_block) Dirtify block in presence of conditional execution

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@51168 138bc75d-0d04-0410-961f-82ee72b054a4