2003-03-10  Aldy Hernandez  <aldyh@redhat.com>

        * config/rs6000/rs6000.h (DWARF_FRAME_REGISTERS): Define.
        (rs6000_stack_t): Add spe_64bit_regs_used.

        * config/rs6000/rs6000.c (rs6000_stack_info): Calculate
        spe_64bit_regs_used, and use it to determine the size of the
        frame.
        (spe_func_has_64bit_regs_p): New.
        (spe_synthesize_frame_save): New.
        (rs6000_frame_related): Handle SPE synthetic registers.
        (rs6000_emit_prologue): Only save in 64-bits if the function used
        any registers in 64-bit mode.
        (rs6000_emit_epilogue): Same, but for restore.

From-SVN: r64102