[llvm-commits] PATCH: Teach LLVM to form minimal multiply DAGs

[Evan Cheng]

On Apr 25, 2012, at 10:54 PM, Chandler Carruth wrote:

> On Wed, Apr 25, 2012 at 10:45 PM, Evan Cheng <evan.cheng at apple.com> wrote:
> 
> 
> On Apr 25, 2012, at 9:20 PM, Chandler Carruth <chandlerc at gmail.com> wrote:
> 
>> On Tue, Apr 24, 2012 at 4:47 PM, Evan Cheng <evan.cheng at apple.com> wrote:
>> Interesting stuff. But it seems like we need some performance data. Are they coming? :-)
>> 
>> Indeed!
>> 
>> This has almost no impact on LNT. The only regressions look like noise to me (<3%, only two benchmarks)
>> 
>> However, SPASS speeds up by 8%!!! =D
> 
> Which platforms?
> 
> x86-64
> 
> Should i test it on some others? i don't have any arm hardware handy, but can ask folks who do...
> 
> I could check 32-bit i suppose, i don't usually track 32-bit x86 because it isn't relevant performance wise for anything I use...

I was hoping for ARM numbers as well.

Evan
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