On Mon, Aug 18, 2014 at 12:29 PM, Uros Bizjak wrote:
> On Mon, Aug 18, 2014 at 9:16 PM, H.J. Lu wrote:
>
>>> Attached patch fixes the problem with false data dependency on output
>>> register for popcnt, lzcnt and tzcnt insns on sandybridge and haswell
>>> targets.
>>>
>>> The new insn pattern sh
On Mon, Aug 18, 2014 at 9:16 PM, H.J. Lu wrote:
>> Attached patch fixes the problem with false data dependency on output
>> register for popcnt, lzcnt and tzcnt insns on sandybridge and haswell
>> targets.
>>
>> The new insn pattern shadows existing one, and after reload, the
>> clearing isns is
On Sat, Aug 16, 2014 at 6:01 AM, Uros Bizjak wrote:
> Hello!
>
> Attached patch fixes the problem with false data dependency on output
> register for popcnt, lzcnt and tzcnt insns on sandybridge and haswell
> targets.
>
> The new insn pattern shadows existing one, and after reload, the
> clearing
Hello!
Attached patch fixes the problem with false data dependency on output
register for popcnt, lzcnt and tzcnt insns on sandybridge and haswell
targets.
The new insn pattern shadows existing one, and after reload, the
clearing isns is split out of the insn. This way the clearing insn can
be sc
