search for: meaining

Hello. I am on an irrational crusade against unneeded timers (it started as a well-meaining power saving exercise), and I have now started removing polling in Dovecot. Attached is a patch with the work I did on this the other night. Would something like that be acceptable, or should I make it in a different way? There seems to be no one-shot timer support, right? Is there a Dovecot cod...

...eSignBit, etc. which often doesn't change but is not intelligently reused. I imagine that the performance win might be quite comparable. Can you back this up with measurements? Caching schemes are tricky. Is there a way to evaluate when the results of ComputeKnownBits etc is actually effective meaining the result is used and gives faster instructions? E.g. it might well be that only the first instance of inst_combine benefits from computing the bits. > Such a patch would have the benefit of keeping the set of available transforms constant throughout the pipeline while bringing execution tim...

...esn't change but is not intelligently > reused. I imagine that the performance win might be quite comparable. > > > Can you back this up with measurements? Caching schemes are tricky. Is > there a way to evaluate when the results of ComputeKnownBits etc is > actually effective meaining the result is used and gives faster > instructions? E.g. it might well be that only the first instance of > inst_combine benefits from computing the bits. > > > To (hopefully) make it easier to answer this question, I've posted my > (work-in-progress) patch which adds a known-...

Hi list, I made an open source CMS powered by Rails, named Rubricks. I have a web page for Rubricks. You can download it or view a flash demo there. Please try them and feed me back, like bug report etc. Check it out at: http://rubricks.org/index_en.html Thanks. Shouta

...doesn't change but is not intelligently reused. I imagine that the performance win might be quite comparable. >>> >>> Can you back this up with measurements? Caching schemes are tricky. Is there a way to evaluate when the results of ComputeKnownBits etc is actually effective meaining the result is used and gives faster instructions? E.g. it might well be that only the first instance of inst_combine benefits from computing the bits. >> >> To (hopefully) make it easier to answer this question, I've posted my (work-in-progress) patch which adds a known-bits cache...

On 03/17/2017 04:30 PM, Mehdi Amini via llvm-dev wrote: > >> On Mar 17, 2017, at 11:50 AM, Mikhail Zolotukhin via llvm-dev >> <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: >> >> Hi, >> >> One of the most time-consuming passes in LLVM middle-end is >> InstCombine (see e.g. [1]). It is a very powerful pass capable