* tree.c (list_equal_p): New function.
	* tree.h (list_equal_p): Declare.
	* coretypes.h (edge_def, edge, const_edge, basic_block_def
	basic_block_def, basic_block, const_basic_block): New.
	* tree-eh.c (make_eh_edge): EH edges are not abnormal.
	(redirect_eh_edge): New function.
	(make_eh_edge_update_phi): EH edges are not abnormal.
	* except.c: Include tree-flow.h.
	(list_match): New function.
	(eh_region_replaceable_by_p): New function.
	(replace_region): New function.
	(hash_type_list): New function.
	(hash_eh_region): New function.
	(eh_regions_equal_p): New function.
	(merge_peers): New function.
	(remove_unreachable_regions): Verify EH tree when checking;
	merge peers.
	(copy_eh_region_1): New function.
	(copy_eh_region): New function.
	(push_reachable_handler): New function.
	(build_post_landing_pads, dw2_build_landing_pads): Be ready for
	regions without label but with live RESX.
	* except.h (redirect_eh_edge_to_label): New.
	* tree-flow.h (redirect_eh_edge): New.
	* coretypes.h (edge_def, edge, const_edge, basic_block_def
	basic_block_def, basic_block, const_basic_block): Remove.
	* Makefile.in (except.o): Add dependency on tree-flow.h
	* tree-cfg.c (gimple_redirect_edge_and_branch): Handle EH edges.
	* basic-block.h (edge, const_edge, basic_block, const_basic_block):
	Remove.

From-SVN: r146776