* config/mn10300/mn10300.h (FIRST_PSEUDO_REGISTER): Increment by
        one.
        (MDR_REGNUM): Define.
        (FIXED_REGISTERS, CALL_USED_REGISTERS): Add MDR as a fixed
        register.
        (REG_CLASS_CONTENTS): Add MDR to ALL_REGS.
        (INCOMING_RETURN_ADDR_RTX): Define in terms of MDR.
        (REGISTER_NAMES): Add MDR.
        (DWARF2_DEBUGGING_INFO): Define to 1.
        * config/mn10300/mn10300.c (TARGET_EXCEPT_UNWIND_INFO): Define.
        (F): New function.  Sets RTX_FRAME_RELATED_P.
        (mn10300_gen_multiple_store): Use F.
        (expand_prologue): Use F.  Use gen_movsf() to push floating
        point registers.
        (expand_epilogue): Use gen_movsf() to pop floating point
        registers.
        (mn10300_option_override): Disable combine stack adjust pass.

From-SVN: r165015