[RS6000] Prologue error saving vector regs

[David Edelsohn]

On Tue, May 11, 2010 at 9:50 AM, Alan Modra <amodra@gmail.com> wrote:

> Bootstrapped and regression tested powerpc-linux.  OK to apply?
> Active branches too?
>
>        * config/rs6000/rs6000.c (rs6000_emit_allocate_stack): Delete
>        unnecessary prototype.  Replace copy_r12 and copy_r11 flag params
>        with copy_reg rtx param.
>        (rs6000_emit_prologue): Update rs6000_emit_allocate_stack calls.
>        Correct cases where code for ABI_V4 did not initialise the reg
>        used to access frame.  Also leave frame_reg_rtx as sp for large
>        frames that save no regs.

This patch is okay.

Thanks, David