basic-block.h (cached_make_edge, [...]): New.
* 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.
From-SVN: r45540