assign_parm_setup_block handling of parallels

[Richard Henderson]

On Thu, Dec 23, 2004 at 04:28:24PM -0400, Aldy Hernandez wrote:
>   /* If we've a non-block object that's nevertheless passed in parts,
>      reconstitute it in register operations rather than on the stack.  */
>   if (GET_CODE (entry_parm) == PARALLEL
>       && data->nominal_mode != BLKmode
>       && XVECLEN (entry_parm, 0) > 1		<-- BOO HISS!
>       && use_register_for_decl (parm))
> 
> Is this vector length check here for a particular reason?

Yes, there was a fight about this particular optimization.  You'll
have to search the archives for details, because my memory is failing.

> or should I add code to look inside and allow this condition, if
> the register in the parallel will span more than one hard register?

That might be plausible, I don't know.


r~