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Re: [PATCH, i386]: Introduce Yp register constraint and merge *_lea add ans ashift patterns with base
On 08/23/11 22:23, Uros Bizjak wrote:
> On Tue, Aug 23, 2011 at 10:04 PM, Richard Henderson <rth@redhat.com> wrote:
>
>>> * config/i386/constraints.md (Yp): New register constraint.
>>> * config/i386/i386.md (*addhi_1): Merge with *addhi_1_lea using
>>> Yp register constraint.
>>> (*addqi_1): Merge with *addqi_1_lea using Yp register constraint.
>>> (*ashlhi3_1): Merge with *ashlhi3_1_lea using Yp register constraint.
>>> (*ashlqi3_1): Merge with *ashlqi3_1_lea using Yp register constraint.
>>
>> You can still make use of attribute enabled...
>
> Yes, I am aware of this attribute, but OTOH, I propose that we use it
> for ISA changes and don't mix everything together.
You could have sub-attributes, "isa_enabled" and "tuning_enabled", which
are then anded together.
Bernd