re PR rtl-optimization/42389 (ICE in advance_state_on_fence with sel-schd for 175...

re PR rtl-optimization/42389 (ICE in advance_state_on_fence with sel-schd for 175.vpr)

        PR rtl-optimization/42389
        * sel-sched.c (advance_one_cycle): Set FENCE_ISSUE_MORE
        to can_issue_more.
        (advance_state_on_fence): Likewise.
        (sel_target_adjust_priority): Print debug output only when
        sched_verbose >= 4, not 2.
        (get_expr_cost): Do not issue all unique insns on the next cycle.
        (fill_insns): Initialize can_issue_more from the value saved
        with the fence.
        * sel-sched-ir.c (flist_add): New parameter issue_more.
        Init FENCE_ISSUE_MORE with it.
        (merge_fences): Likewise.
        (init_fences): Update call to flist_add.
        (add_to_fences, add_clean_fence_to_fences)
        (add_dirty_fence_to_fences): Likewise.
        (move_fence_to_fences): Update call to merge_fences.
        (invoke_reorder_hooks): Do not reset can_issue_more on insns from
        sched groups.
        * sel-sched-ir.h (struct _fence): New field issue_more.
        (FENCE_ISSUE_MORE): New accessor macro.

From-SVN: r155895