Re: Patches to fix optimizer bug & C++ exceptions for GCC VAX backend

[Bernd Schmidt <bschmidt%redhat.com@localhost>]

Cc'ing Matt Thomas who is listed as the vax maintainer; most of the 
patch should be reviewed by him IMO. If he is no longer active I'd 
frankly rather deprecate the port rather than invest effort in keeping 
it running.

> Index: gcc/except.c
> ===================================================================
> RCS file: /cvsroot/src/external/gpl3/gcc/dist/gcc/except.c,v
> retrieving revision 1.3
> diff -u -r1.3 except.c
> --- gcc/except.c	23 Mar 2016 15:51:36 -0000	1.3
> +++ gcc/except.c	28 Mar 2016 23:24:40 -0000
> @@ -2288,7 +2288,8 @@
>   #endif
>       {
>   #ifdef EH_RETURN_HANDLER_RTX
> -      emit_move_insn (EH_RETURN_HANDLER_RTX, crtl->eh.ehr_handler);
> +      rtx insn = emit_move_insn (EH_RETURN_HANDLER_RTX, crtl->eh.ehr_handler);
> +      RTX_FRAME_RELATED_P (insn) = 1;	// XXX FIXME in VAX backend?
>   #else
>         error ("__builtin_eh_return not supported on this target");
>   #endif

This part looks highly suspicious and I think there needs to be further 
analysis.


Bernd