* basic-block.h (basic_block): Add eh_beg, eh_end.
        * flow.c (entry_exit_blocks): Update.
        (find_basic_blocks): Don't allocate bb_eh_end, or pass it around.
        Call new functions.
        (find_basic_blocks_1): Don't record eh_list at each bb.  Use
        lists.c functions to allocate insn lists.
        (make_edges): Use eh_beg+eh_end, not the lists.  Split out EH
        edge creation ...
        (make_eh_edge): ... here.  New.
        (move_stray_eh_region_notes): New.
        (record_active_eh_regions): New.
        (delete_unreachable_blocks): Split out block merging ...
        (try_merge_blocks): ... here.  New.
        (merge_blocks_move_predecessor_nojumps): Remove edge arg.
        Dump debugging data.
        (merge_blocks_move_successor_nojumps): Likewise.
        (merge_blocks): Use eh_beg+eh_end to validate block movement.

From-SVN: r29565