* loop-init.c (loop_optimizer_init, loop_optimizer_finalize): Do not
destroy dominance information.
* passes.c (rest_of_handle_loop2): Free dominance information.
* tree-cfg.c (cleanup_tree_cfg): Remove unreachable blocks before
jump threading.
(thread_jumps): Update dominance information and remove unreachable
blocks.
* tree-ssa-phiopt.c (replace_phi_with_stmt): Update dominance
information and remove the unreachable block.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@84873
138bc75d-0d04-0410-961f-
82ee72b054a4