llvm dev - Apr 2017 - Options for timing passes in LLVM?

Hi LLVM-Dev,

 

Are there any options that can be used to report the time each LLVM pass
takes to execute?  I am examining a program that now takes about 6 times
longer to compiler since we moved to the v4.0 sources from the v3.9 sources
(~54s to ~320s), and so far my investigation does not seem to point to our
additional target specific passes, so I would like to see where the time is
being spent.  If there are existing options already present for this kind of
thing, that would be very helpful.

 

Thanks,

 

            MartinO

 

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Refer to `llc` document [1], it would be `--time-passes`.

[1] http://llvm.org/docs/CommandGuide/llc.html

HTH,
chenwj


2017-04-14 19:39 GMT+08:00 Martin J. O'Riordan via llvm-dev <
llvm-dev at lists.llvm.org>:
> Hi LLVM-Dev,
>
>
>
> Are there any options that can be used to report the time each LLVM pass
> takes to execute?  I am examining a program that now takes about 6 times
> longer to compiler since we moved to the v4.0 sources from the v3.9 sources
> (~54s to ~320s), and so far my investigation does not seem to point to our
> additional target specific passes, so I would like to see where the time is
> being spent.  If there are existing options already present for this kind
> of thing, that would be very helpful.
>
>
>
> Thanks,
>
>
>
>             MartinO
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>

-- 

--
Wei-Ren Chen (陳韋任)
Homepage: https://people.cs.nctu.edu.tw/~chenwj
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Thanks :)

 

From: 陳韋任 [mailto:chenwj.cs97g at g2.nctu.edu.tw] 
Sent: 14 April 2017 12:53
To: Martin J. O'Riordan <martin.oriordan at movidius.com>
Cc: LLVM Developers <llvm-dev at lists.llvm.org>
Subject: Re: [llvm-dev] Options for timing passes in LLVM?

 

Refer to `llc` document [1], it would be `--time-passes`.

 

[1] http://llvm.org/docs/CommandGuide/llc.html

 

HTH,

chenwj

 

 

2017-04-14 19:39 GMT+08:00 Martin J. O'Riordan via llvm-dev <llvm-dev at
lists.llvm.org <mailto:llvm-dev at lists.llvm.org> >:

Hi LLVM-Dev,

 

Are there any options that can be used to report the time each LLVM pass takes
to execute?  I am examining a program that now takes about 6 times longer to
compiler since we moved to the v4.0 sources from the v3.9 sources (~54s to
~320s), and so far my investigation does not seem to point to our additional
target specific passes, so I would like to see where the time is being spent. 
If there are existing options already present for this kind of thing, that would
be very helpful.

 

Thanks,

 

            MartinO

 


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-- 


--
Wei-Ren Chen (陳韋任)
Homepage: https://people.cs.nctu.edu.tw/~chenwj

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