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Re: [PATCH, rs6000] Fix PR78695


On Sun, Dec 11, 2016 at 03:31:35PM -0600, Bill Schmidt wrote:
> On 12/11/16 2:00 PM, Segher Boessenkool wrote:
> > Maybe this should use DF_REF_IS_ARTIFICIAL?  Or if that doesn't work,
> > DF_REF_INSN_INFO?
> >
> OK, currently regstrapping the following, which also fixes the problem with
> a non-bootstrap compiler.  Is this ok for trunk if it succeeds?

> --- gcc/config/rs6000/rs6000.c	(revision 243506)
> +++ gcc/config/rs6000/rs6000.c	(working copy)
> @@ -41433,6 +41433,12 @@ find_alignment_op (rtx_insn *insn, rtx base_reg)
>        if (!base_def_link || base_def_link->next)
>  	break;
>  
> +      /* With stack-protector code enabled, and possibly in other
> +	 circumstances, there may not be an associated insn for 
> +	 the def.  */
> +      if (DF_REF_CLASS (base_def_link->ref) == DF_REF_ARTIFICIAL)
> +	break;

  if (DF_REF_IS_ARTIFICIAL (base_def_link->ref))

Okay with that (no need to retest, just see if it compiles ;-) )

Thanks,


Segher


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