[PATCH] Enabling Software Prefetching by Default at -O3

[Christian Borntraeger]

Am Donnerstag 24 Juni 2010, 23:18:28 schrieb Fang, Changpeng:
> Hi, 
> 
> Attached is the version of the patch that turns prefetching on at -O3 for AMD cpus
> only. As discussed elsewhere in this thread, we use tri-state for -fprefetch-loop-arrays.
> If this flag is not explicitly set,  (for -O3) we turn it on in gcc/config/i386/i386.c 
> (override_options).
> 
> Is this OK to commit now?

Looks good. As soon as this is committed, somebody  should commit the following fix
that makes fno-prefetch-loop-arrays work again on s390.

Andreas, Ulrich. Can you have a look and apply after Changpengs patch if ok.

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