On 11/04/2011 08:53 AM, Jakub Jelinek wrote:
> On Fri, Nov 04, 2011 at 08:48:30AM -0700, Richard Henderson wrote:
>> On 11/04/2011 03:57 AM, Jakub Jelinek wrote:
>>> + /* Optimize. If mask is known to have all high bits set,
>>> +replace op0 with pc_rtx to signal that the instruction
>>>
On Fri, Nov 04, 2011 at 08:48:30AM -0700, Richard Henderson wrote:
> On 11/04/2011 03:57 AM, Jakub Jelinek wrote:
> > + /* Optimize. If mask is known to have all high bits set,
> > +replace op0 with pc_rtx to signal that the instruction
> > +overwrites the whole destination and doesn'
On 11/04/2011 03:57 AM, Jakub Jelinek wrote:
> + /* Optimize. If mask is known to have all high bits set,
> + replace op0 with pc_rtx to signal that the instruction
> + overwrites the whole destination and doesn't use its
> + previous contents. */
Why pass in PC, rather than
Hi!
This patch on top of the vgather* vectorization patch optimizes
what has been discussed in:
http://gcc.gnu.org/ml/gcc/2011-11/msg00078.html
2011-11-04 Jakub Jelinek
* config/i386/i386.c (ix86_expand_builtin): If gather mask
argument is known to have all high bits set, pass
