epiphany.h (struct GTY (()) machine_function): Add member lr_slot_known.

epiphany.h (struct GTY (()) machine_function): Add member lr_slot_known.

        * config/epiphany/epiphany.h (struct GTY (()) machine_function):
        Add member lr_slot_known.
        * config/epiphany/epiphany.md (reload_insi_ra): Compute lr_slot_offs
        if necessary.
        * config/epiphany/epiphany.c (epiphany_compute_frame_size):
        Remove code that sets lr_slot_offset according to what a previous
        version of epiphany_emit_save_restore used to do.
        (epiphany_emit_save_restore): When doing an lr save or restore,
        set/verify lr_slot_known and lr_slot_offset.

From-SVN: r197577