[PATCH, i386] Enable -mprefer-avx128 by default for Bulldozer

[Jakub Jelinek]

On Wed, Jun 29, 2011 at 09:49:52AM +0200, Jan Hubicka wrote:
> > 	* config/i386/i386.opt (mprefer-avx128): Redefine the flag as a Mask option.
> > 
> > 	* config/i386/i386.h (ix86_tune_indices): Add X86_TUNE_AVX128_OPTIMAL entry.
> > 	(TARGET_AVX128_OPTIMAL): New definition.
> > 
> > 	* config/i386/i386.c (initial_ix86_tune_features): Initialize
> > 	X86_TUNE_AVX128_OPTIMAL entry.
> > 	(ix86_option_override_internal): Enable the generation
> > 	of the 128-bit instructions when TARGET_AVX128_OPTIMAL is set.
> > 	(ix86_preferred_simd_mode): Use TARGET_PREFER_AVX128.
> > 	(ix86_autovectorize_vector_sizes): Use TARGET_PREFER_AVX128.
> 
> OK for mainline.  For 4.6 it is RM's call.

For 4.6 it is fine as well.

	Jakub