Re: [tree-ssa-lno] vectorizer patch.

[Daniel Berlin <dberlin at dberlin dot org>]

On Jan 2, 2004, at 4:12 PM, Richard Henderson wrote:

> On Fri, Jan 02, 2004 at 03:32:07PM -0500, Daniel Berlin wrote:
> > Did you add the target hook that tells it what vector type to use for 
> > a
> > given scalar type (See rs6000_vectype_for_scalartype)?
> >
> > #undef TARGET_VECTYPE_FOR_SCALAR_TYPE
> > #define TARGET_VECTYPE_FOR_SCALAR_TYPE rs6000_vectype_for_scalar_type
>
> Um, no.  Why would such a thing be needed?

Well, the vectorizer uses it:

   Currently the only target specific information that is used is the
   size of the vector (in bytes) - "UNITS_PER_SIMD_WORD", and a target 
hook
   "vectype_for_scalar_type" that for a given (scalar) machine mode 
returns
   the vector machine_mode to be used. Targets that can support 
different
   sizes of vectors, for now will need to specify one value for
   "UNITS_PER_SIMD_WORD". More flexibility will be added in the future.
>