target.def (compute_frame_layout): New optional target hook.

target.def (compute_frame_layout): New optional target hook.

2017-05-08  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * target.def (compute_frame_layout): New optional target hook.
        * doc/tm.texi.in (TARGET_COMPUTE_FRAME_LAYOUT): Add hook.
        * doc/tm.texi (TARGET_COMPUTE_FRAME_LAYOUT): Add documentation.
        * lra-eliminations.c (update_reg_eliminate): Call compute_frame_layout
        target hook.
        * reload1.c (verify_initial_elim_offsets): Likewise.
        * config/arm/arm.c (TARGET_COMPUTE_FRAME_LAYOUT): Define.
        (use_simple_return_p): Call arm_compute_frame_layout if needed.
        (arm_get_frame_offsets): Split up into this ...
        (arm_compute_frame_layout): ... and this function.

From-SVN: r247750