[llvm-dev] Options for timing passes in LLVM?

[Craig Topper via llvm-dev]

For clang you want -ftime-report

On Fri, Apr 14, 2017 at 5:08 AM Martin J. O'Riordan via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Thanks J
>
>
>
> *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>:
>
> 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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-- 
~Craig
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