[rs6000] Fix PR 50906, eh_frame and other woes

[David Edelsohn]

On Fri, Nov 4, 2011 at 9:07 AM, Alan Modra <amodra@gmail.com> wrote:

> OK to apply?  gcc-4.6 branch too?
>
>        PR target/50906
>        * config/rs6000/rs6000.c (rs6000_emit_prologue <TARGET_SPE_ABI>):
>        Do not mark r11 setup as frame-related.  Pass correct offset to
>        rs6000_emit_savres_rtx.  Correct out-of-line rs6000_frame_related
>        arguments.  Correct sp_offset.  Remove "offset" fudge from
>        in-line rs6000_frame_related call.  Rename misleading variable.
>        Fix comments and whitespace.  Tidy some expressions.
>        (rs6000_emit_epilogue <TARGET_SPE_ABI>): Always set frame_reg_rtx
>        to r11 in out-of-line case.  Correct sp_offset.  Pass correct
>        offset to rs6000_emit_savres_rtx.  Rename misleading variable.
>        Fix comments and whitespace.  Tidy some expressions.
>        (rs6000_emit_epilogue <non-TARGET_SPE_ABI>): Add sp_offset
>        adjustment when !saving_GPRs_inline.  Correct register mode
>        used in address calcs.
>        (rs6000_emit_epilogue <non-TARGET_SPE_ABI>): Similarly when
>        !restoring_GPRs_inline.

Okay for trunk and 4.6.

Thanks, David