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<div class="moz-cite-prefix">On 12/12/19 3:50 AM, Juneyoung Lee
wrote:<br>
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cite="mid:CAGwnbJRc_h+tvDoi2nw43x-F8a1BSpABw88ZJNkohPq3DV4U7A@mail.gmail.com">
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<div dir="ltr">Hello Fedor.
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<div>Thank you for the information.</div>
<div>I made a simple patch that exposes
PassInstrumentationCallback so llvmGetPassPluginInfo can use
it: <a href="https://reviews.llvm.org/D71086"
moz-do-not-send="true">https://reviews.llvm.org/D71086</a>
. Would this change make sense?</div>
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Sure, I did reply in review.<br>
<br>
regards,<br>
Fedor.<br>
<blockquote type="cite"
cite="mid:CAGwnbJRc_h+tvDoi2nw43x-F8a1BSpABw88ZJNkohPq3DV4U7A@mail.gmail.com">
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<div>Thanks,</div>
<div>Juneyoung Lee</div>
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<div dir="ltr" class="gmail_attr">On Thu, Dec 12, 2019 at 12:44
AM Fedor Sergeev <<a href="mailto:fedor.sergeev@azul.com"
moz-do-not-send="true">fedor.sergeev@azul.com</a>> wrote:<br>
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<div>On 12/3/19 8:01 PM, Juneyoung Lee via llvm-dev wrote:<br>
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<div>Hello all, </div>
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<div>Is there a way to register callback that runs
before/after passes?</div>
<div>PassTimingInfo seems to do a similar thing by
calling
PassInstrumentationCallbacks::registerBeforePassCallback
/ registerAfterPassCallback, but it is hard-wired
with StandardInstrumentations class.</div>
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PassInstrumentation framework was introduced to the new
PassManager specifically in mind with ability<br>
to register arbitrary callbacks and execute them as pass
manager traverses through the pass pipeline.<br>
<br>
PassInstrumentationCallbacks are indeed the entity to
register your callbacks into, before passing it to
PassBuilder;<br>
You can check how it is being done in
`llvm/tools/opt/NewPMDriver.cpp`llvm::runPassPipeline.<br>
<br>
StandardInstrumentations are just a few "standard" callbacks
that provide "standard" functionality, like -print-after-all
or -time-passes.<br>
StandardInstrumentations registers its individual
instrumentations the same way you would register your own.<br>
<br>
Note, that PassInstrumentation is only supported in new pass
manager (opt -passes= or clang
-fexperimental-new-pass-manager).<br>
<br>
regards,<br>
Fedor.<br>
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<div>Do we have something similar to
RegisterStandardPasses, so custom callbacks can be
added from somewhere outside LLVM?</div>
<div><br>
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<div>Thanks,</div>
<div>Juneyoung Lee</div>
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-- <br>
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<font size="1">Juneyoung Lee</font>
<div><font size="1">Software Foundation Lab, Seoul National
University</font></div>
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