Helper function for epilogue expansion.

Helper function for epilogue expansion.

Helper function for epilogue expansion. Emit RTL for APCS frame epilogue
(when -mapcs-frame command line option is specified).
This function is used by a later patch.

gcc/

2012-06-18  Ian Bolton  <ian.bolton@arm.com>
            Sameera Deshpande  <sameera.deshpande@arm.com>
            Greta Yorsh  <greta.yorsh@arm.com>

        * config/arm/arm.c (arm_expand_epilogue_apcs_frame): New function.
        * config/arm/arm.md (arm_addsi3) Add an alternative.

Co-Authored-By: Greta Yorsh <greta.yorsh@arm.com>
Co-Authored-By: Sameera Deshpande <sameera.deshpande@arm.com>
From-SVN: r188741