haifa-sched.c (true_dependency_cache): New.

haifa-sched.c (true_dependency_cache): New.

        * haifa-sched.c (true_dependency_cache): New.
        (add_dependence): Use the true dependency cache to avoid expensive
        walks down the LOG_LINKS dependency list.  Add entries to the
        cache as necessary.
        (remove_dependence): Remove entries from the true dependency cache
        as needed.
        (schedule_insns): Allocate and initialize and free the true
        dependency cache.

From-SVN: r30050