[LLVMdev] Performance impact of different optimization passes

[Ahmed ElTantawy]

Hi John,

Thanks for your email. I was looking for simply an estimation of the
performance loss/gain when each of the current LLVM passes is
disabled/enabled. Is there such data for recent versions of LLVM ? I could
not see such quantitative data in the outcomes of the search link you
suggested.

Alternatively, is their any sort of regressions that runs with every update
to LLVM source code and provides the impact on performance for a set of
benchmarks (or a set of test cases) ?

Best regards,
Ahmed




On Fri, Jun 19, 2015 at 3:56 PM, John Regehr <regehr at cs.utah.edu> wrote:

> I was wondering if there is a paper or a technical report that documents
>> the performance impact
>> of the different optimizations passes on a some set of benchmarks. Is
>> something like this
>> available ?
>>
>
> A lot of reserach has been done on this generic topic, a search like this
> will get you some of it and you can no doubt find the rest by following
> references:
>
> https://www.google.com/search?q=llvm+%22phase+ordering%22+filetype:pdf
>
> John
>
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