* basic-block.h (cached_make_edge, make_single_succ): New.

	(make_edge): Remove first parameter.
	* bb-reroder.c (fixup_reorder_chain): Use make_single_succ_edge.
	* cfg.c (cached_make_edge): Rename from make_edge; return newly
	created edge; use obstack allocation.
	(make_edge, make_single_succ_edge): New.
	(first_removed_edge): New static variable.
	(init_flow): Initialize first_removed_edge and n_edges.
	(clear_edges): Use remove_edge.
	(flow_delete_block): Likewise.
	(remove_edge): Add removed edges to the removed edges list.
	(split_block, redirect_edge_and_branch_force, split_edge):
	Use make_edge.
	* cfganal.c (flow_call_edges_add): Updaet make_edge call.
	(add_noreturn_fake_exit_edges): Likewise.
	(connect_infinite_loops_to_exit): Liekwise.
	* cfgbuild.c (make_label_edge, make_edges, find_sub_basic_blocks):
	Use cached_make_edge.
	* cfgcleanup.c (try_crossjump_to_edge): Use make_single_succ_edge.
	* profile.c (branch_prob): Update make_edge call.
	* ssa-dce.c (ssa_eliminate_dead_code): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45540 138bc75d-0d04-0410-961f-82ee72b054a4

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