PR tree-optimization/17766
* basic-block.h (enum dom_state): DOM_CONS_OK removed.
(dom_info_available_p): Declare.
* cfghooks.c (split_block, make_forwarder_block): Use
dom_info_available_p.
* dominance.c (compute_dom_fast_query, calculate_dominance_info,
free_dominance_info, verify_dominators): Ditto.
(dom_info_available_p): New function.
* tree-cfg.c (cleanup_control_expr_graph): Free dominance information.
(thread_jumps): Use dom_info_available_p.
* tree-complex.c (expand_complex_div_wide): Ditto.
* tree-mudflap.c (mf_build_check_statement_for): Ditto.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@89147 138bc75d-0d04-0410-961f-82ee72b054a4