<div dir="ltr">Hi Nick,<br><br>What you said makes sense, but it's not called a call graph. :)<br>You're essentially referring to what LoopInfo does which makes sense, but as I mentioned earlier, this is already done<br>in the LoopInfo. Now, how much one will be able to use it in a LoopNestPass is another issue, which is certainly<br>something that mentors could help you with.<br><br>Best,<br>Stefanos</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Στις Τρί, 17 Μαρ 2020 στις 3:35 μ.μ., ο/η Nicholas Krause <<a href="mailto:xerofoify@gmail.com">xerofoify@gmail.com</a>> έγραψε:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<br>
<br>
<div>On 3/17/20 9:23 AM, Stefanos Baziotis
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">> Yes that's correct.<br>
Well, now that I saw the LoopNestAnalysis* files, they try to do
sth similar. So, I hope it helped.<br>
<br>
> My idea was similar but using the call graph directly<br>
<br>
Personally I don't see how the call graph can help you, since
well... it's a call graph. :)<br>
</div>
</blockquote>
Not directly but you can could implement a call graph for the loops
internal to a function and walk up <br>
it backwards. In addition you could make it possible to implement
this call graph to know the number<br>
of loops nested and pop out to the outermost as a function.
Basically SCC for loops themselves rather<br>
than functions.<br>
<br>
That's probably beyond the scope of the project so your right it
doesn't matter for this,<br>
Nick<br>
<blockquote type="cite">
<div dir="ltr">You care about loops in a specific function. What
can help you is the Control-Flow graph, which is basically what
LoopInfo uses to identify loops in a function.<br>
But because of that, loop identification is not your problem,
loop traversing is, if I understand it correctly.<br>
Although you have to do things similar to loop identification
(i.e. what LoopInfo does) when trying to<br>
decide for perfect nestings etc.<br>
<br>
Best,<br>
Stefanos<br>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Στις Τρί, 17 Μαρ 2020 στις
3:08 μ.μ., ο/η Nicholas Krause <<a href="mailto:xerofoify@gmail.com" target="_blank">xerofoify@gmail.com</a>>
έγραψε:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> <br>
<br>
<div>On 3/16/20 11:41 PM, Stefanos Baziotis wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi everyone,<br>
<br>
> I probably do not have the time to get a patch
through.<br>
IMHO, you do. :)<br>
<br>
First of all, @Benson sorry but I'm not at all familiar
with LLDB so I can't help there.<br>
<br>
Other than that, I'll also disappoint you both probably
because I'm not that familiar with the creation of
passes and the problem at hand. I'll try to help as I
can.<br>
<br>
> <span style="color:rgb(0,0,0);font-family:Arial;font-size:14.6667px;white-space:pre-wrap">Is there a specific section of the dragon book that I should read so that I can at least understand theoretically what it means to create a LoopNestPass?
As I can understand, no because it's more of a structural, LLVM-specific problem than a generic, compiler optimization problem.
> </span>Stefanos can speak to this more but in order to create a
LoopNestPass after reading what they are talking about
requires information from the call graph<br>
> for a function or the loop hierarchy in LLVM IR.
I'm not sure of the internal classes for this so
Stefanos is there a way currently to get the info in IR
about<br>
> the outer loop or from the call graph? That seems
to be the biggest problem getting the outer loop in the
IR or the call graph. After that you would<br>
> basically check if the loop is the outer loop and
if so you can add dynamically to the pipeline.<br>
<br>
I'm not sure I followed you here. First of all, if you
create a regular LoopPass, you'll visit loops from the
innermost to the outermost. In the loop nest pass<br>
you want the outermost though, so you'll have to visit
them all until you there. Now if you do it in a function
pass, you lose the ability to put loops<br>
back into the pipeline, as this is how the function pass
works. So, the way I understand it, to solve that
problem, one would create something like a function<br>
pass, figure out the loops there (i.e. with LoopInfo),
then convert it to LoopPass so that you can run loop
passes over the loops.<br>
I think this can happen already, but right now, loops
are going in reverse order: <a href="https://github.com/llvm/llvm-project/blob/master/llvm/include/llvm/Transforms/Scalar/LoopPassManager.h#L230" target="_blank">https://github.com/llvm/llvm-project/blob/master/llvm/include/llvm/Transforms/Scalar/LoopPassManager.h#L230</a><br>
So, maybe if you could modify that to something like
FunctionToLestNestPassAdaptor, it would work? I don't
know that's just an idea, let me not confuse you more.<br>
<br>
Best,<br>
Stefanos</div>
</blockquote>
Yes that's correct. My idea was similar but using the call
graph directly. The other problem is how to keep LCSSA form
for all the loops as well and I'm<br>
aware that function passes don't care about that. So you
can't really convert to a function pass itself but something
similar.<br>
<br>
Nick<br>
<blockquote type="cite">
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Στις Δευ, 16 Μαρ 2020
στις 5:53 π.μ., ο/η Nicholas Krause <<a href="mailto:xerofoify@gmail.com" target="_blank">xerofoify@gmail.com</a>>
έγραψε:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> <br>
<br>
<div>On 3/15/20 11:12 PM, Benson Bin Bin Li via
llvm-dev wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi Stefanos,</div>
<div><br>
</div>
<div>First, thanks a lot for the very detailed
response! I watched both of the videos, and I
seem to have a rough idea now of how each of
the different pieces of software maps onto the
compilation process. Though I found blogs such
as these two: <a href="https://jonasdevlieghere.com/understanding-the-clang-ast/" target="_blank">https://jonasdevlieghere.com/understanding-the-clang-ast/</a>,
<a href="https://releases.llvm.org/2.6/docs/tutorial/JITTutorial1.html" target="_blank">https://releases.llvm.org/2.6/docs/tutorial/JITTutorial1.html</a>
to be better for a more in-depth
understanding. Anyways, in response to your
answers:</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>The latter can even be problematic if you
start applying C++ craziness while the first
is pretty much always needed when working in
a team project.</div>
</blockquote>
<div>Ok, that makes sense as you would want the
style to be consistent throughout. <br>
</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>running the LLVM suite is super easy</div>
</blockquote>
<div>Yeah, everything went fine from following
your instructions. I do have a question
though: How do I diagnose failed tests? I
found the files that correspond to them, and
they seem to be 1 line scripts rather than
"code" per say. <br>
</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> But I think every good GSoC proposal
includes a biography-like section</div>
</blockquote>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>Then, try to study it, understand the
context and the problem. <br>
</div>
</blockquote>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>But because submitting good patches is
one of the best indicators <br>
</div>
</blockquote>
<div>Ok, so for the application process,
basically try to get more info on the projects
I am interested in and from there submit a
proposal? Given the whole coronavirus
situation and the time remaining for the
application, I probably do not have the time
to get a patch through. Regarding the projects
I am interested in, I have narrowed it down to
two(mostly because I don't think I have the
ability to tackle PostDominatorTree project as
of now), and have the following questions
about them:</div>
<div><br>
</div>
<div>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt" id="gmail-m_-760413992732672551gmail-m_-1000483654617762840gmail-m_8480675998277982117gmail-docs-internal-guid-48482a0b-7fff-e7f0-4627-fb046bcc2e7f"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline;white-space:pre-wrap">LLVM Pass</span></p>
<ol style="margin-top:0px;margin-bottom:0px">
<li dir="ltr" style="list-style-type:decimal;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">I am following the guide to create a LLVM pass following this guide(<a href="https://llvm.org/docs/WritingAnLLVMPass.html" target="_blank">https://llvm.org/docs/WritingAnLLVMPass.html</a>), but it appears “add_llvm_library” is a macro and not a built-in command. So I have two questions. 1) In comparing the online repo I found this macro in and my local, it appears I don’t have the file. Do I need to build it then? 2) How do I tell CMake to look for this macro?</span></p></li>
<li dir="ltr" style="list-style-type:decimal;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Is there a specific section of the dragon book that I should read so that I can at least understand theoretically what it means to create a LoopNestPass?</span></p></li>
</ol>
</div>
</div>
</blockquote>
Stefanos can speak to this more but in order to
create a LoopNestPass after reading what they are
talking about requires information from the call
graph<br>
for a function or the loop hierarchy in LLVM IR. I'm
not sure of the internal classes for this so
Stefanos is there a way currently to get the info in
IR about<br>
the outer loop or from the call graph? That seems to
be the biggest problem getting the outer loop in the
IR or the call graph. After that you would<br>
basically check if the loop is the outer loop and if
so you can add dynamically to the pipeline. <br>
<br>
Sorry if I'm not much help as I'm not sure if the
call graph API supports this but I'm pretty sure
LLVM IR doesn't make this easy,<br>
Nick<br>
<blockquote type="cite">
<div dir="ltr">
<div><br>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline;white-space:pre-wrap">LLDB Tab Completion</span></p>
<ol style="margin-top:0px;margin-bottom:0px">
<li style="list-style-type:decimal;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Is there any resource I can read that explains how lldb is able to “pause” the executable and map it to a certain line in the source file/in general how lldb represents the state of the executable?</span></p></li>
<li style="list-style-type:decimal;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Where in the source code can I go to see how existing tab completions are implemented?</span></p></li>
<li style="list-style-type:decimal;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">I built lldb and check-lldb, but it seems that the call path to clang got messed up, as it is trying to call "Example=Code/llvm-project" rather than my actual name for the directory "Example-Code/llvm-project". Should I just clone the repo into a parent directory that doesn't use hyphen?
</span></li>
</ol>
</div>
<div><br>
</div>
<div>(Would it be better if I posted this on the
forum?)</div>
<div><br>
</div>
<div>Best regards,</div>
<div>Benson<br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Mar
14, 2020 at 11:10 AM Stefanos Baziotis <<a href="mailto:stefanos.baziotis@gmail.com" target="_blank">stefanos.baziotis@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi Benson,<br>
<br>
You're welcome to the LLVM community!<br>
<br>
I'll try to help but note that I'm no formal
position to talk about how LLVM decides
about GSoC (I'm a LLVM newcomer anyway).<br>
With that said, the rest is _my_ opinion
which is partially formed from my experience
as a GSoC student.<br>
<br>
> <span style="color:rgb(0,0,0);font-family:Arial;font-size:14.6667px;white-space:pre-wrap">But to be up front about this, I have not done any full scale C++ project
</span><br>
Depending on how you define "full-scale", a
lot of amazing LLVM contributors have not
done a full-scale C++. So, I think no
problem there, it's just good to have a
relatively good knowledge of C++.<br>
Talking about C++ skills, I think they're
more important if you want to contribute to
Clang than say LLVM middle or back-end.
Because for Clang, you have to know a lot of
details of the language<br>
in order to parse it, type-check it and
generate LLVM IR. In most other parts of
LLVM, you're only using the language.<br>
As a matter of fact, if you have a good
knowledge of C++, I believe it's more
important to be able to understand and adapt
to "nearby" code, than to be an expert in
C++.<br>
The latter can even be problematic if you
start applying C++ craziness while the first
is pretty much always needed when working in
a team project.<br>
<br>
> <span style="color:rgb(0,0,0);font-family:Arial;font-size:14.6667px;white-space:pre-wrap">1. Do I need to submit a resume/screening/patches?
</span><br>
As far as the resume, in the way that you
may usually apply to jobs, no. But I think
every good GSoC proposal includes a
biography-like section<br>
where you basically tell your story in
programming and how you fit into the project
(in our case, LLVM).<br>
<br>
I'm not sure what you mean by screening.<br>
<br>
As for patches, I don't think they're
required but they're super useful. Not
because they're some part of unrelated
logistics (like "you have to have X patches
to be considered").<br>
But because submitting good patches is one
of the best indicators (if not the best)
that you are able to do useful work in this
project. :)<br>
And they don't only show your technical
skills. But also communication skills,
independence etc.<br>
<br>
> 2. <span style="color:rgb(0,0,0);font-family:Arial;font-size:14.6667px;white-space:pre-wrap">Although I do have interests in certain projects posted on you website(Implement missing tab completion, createLoopPass, and PostDominatorTree), I am uncertain if I have enough expertise to decide what would be an appropriate project to contribute to given my current knowledge and experience.
</span><br>
This is kind of a generic sentence.<br>
I'd say, start with finding a project that
you're truly interested in. Then, try to
study it, understand the context and the
problem.<br>
You don't need to get very far, that's
totally ok. You can then do a post (either
here or on Discourse: <a href="https://llvm.discourse.group/c/community/gsoc/32" target="_blank">https://llvm.discourse.group/c/community/gsoc/32</a>)<br>
for this specific project (you can do posts
for multiple projects).<br>
Hopefully, by discussing with people (and
mentors) and understanding what the project
is asking better,<br>
you can find if you want to do it or not.
Certainly, the mentors of the project can
guide you through.<br>
<br>
<span style="color:rgb(0,0,0);font-family:Arial;font-size:14.6667px;white-space:pre-wrap">3. The GCC GSoC website suggested checking out their source code, compiling and running their test suite. Can I do something similar for LLVM?
</span><br>
Yes, totally. I'm not familiar with GCC
internals but running the LLVM suite is
super easy (so easy that you don't really
learn anything by doing it :P )<br>
So, the LLVM project has moved to a common
repository: <a href="https://github.com/llvm/llvm-project" target="_blank">https://github.com/llvm/llvm-project</a><br>
You can clone the project and then use CMake
to build it. The cmake configuration for
LLVM has a bunch of flags: <a href="https://llvm.org/docs/CMake.html" target="_blank">https://llvm.org/docs/CMake.html</a><br>
and you may get lost. So, I'll say start
simple:<br>
Go to the llvm-project dir (the one you
cloned) and do:<br>
cmake ./llvm -DLLVM_ENABLE_PROJECTS="clang"
-DCMAKE_BUILD_TYPE=Release
-DLLVM_ENABLE_ASSERTIONS=ON
-DLLVM_TARGETS_TO_BUILD="X86"<br>
<br>
In the link above you can read what the
flags do. llvm middle / back-end (i.e. opt /
llc, ask if you don't know what these mean)
is always built. But to build clang<br>
we have to enable it explicitly. We set
build type to release because doing a debug
build will take a lot of time and a lot of
space. Also, when starting out,<br>
you probably don't need it. We enable
assertions mostly because you can use the
-debug option say in opt and see debug
prints.<br>
Finally, we only build for x86 arch because
that's probably what you have and you don't
need any other for now.<br>
<br>
Hit enter and once the configuration is
complete you can do:<br>
make<br>
or<br>
make -j<number of threads> <--
this is faster but limit it depending on
your systemS<br>
<br>
When that's finished, the llvm-project/bin/
dir will have executables like clang,
clang++, opt, llc etc.<br>
Which you can run (also ask if you don't
know what to do with them. With clang you
probably will know, it's like invoking<br>
most compilers like gcc to compile .c / .cpp
files).<br>
<br>
To run the test suite, you can go to
llvm-project/llvm/test and do:<br>
<dir of llvm-project>/bin/llvm-lit .<br>
That will run only llvm's test suite but
you'll get an idea.<br>
<br>
Also, you can watch these videos:<br>
<a href="https://www.youtube.com/watch?v=J5xExRGaIIY" target="_blank">https://www.youtube.com/watch?v=J5xExRGaIIY</a><br>
<a href="https://www.youtube.com/watch?v=5kkMpJpIGYU" target="_blank">https://www.youtube.com/watch?v=5kkMpJpIGYU</a><br>
<br>
Hope this helped!<br>
<br>
Kind regards,<br>
Stefanos Baziotis</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Στις Σάβ,
14 Μαρ 2020 στις 2:04 π.μ., ο/η Benson Bin
Bin Li via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>>
έγραψε:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt" id="gmail-m_-760413992732672551gmail-m_-1000483654617762840gmail-m_8480675998277982117gmail-m_-4313643294865233574gmail-m_-8466928840379538763gmail-docs-internal-guid-2a0d31dc-7fff-9297-e699-ad2df8792b10"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Dear LLVM Team,</span></p>
<br>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">I would like to contribute to/participate in LLVM’s GSOC, because I would very much like to combine my knowledge of graph theory/algorithms and my interest in C++ together. Contributing to the LLVM code seems like a fantastic challenge and learning experience for these two interests of mine, as well as computer science in general (For example, the use of a new syntactic category to disambiguate a grammar demonstrates 1) indirection 2) the power of naming things).</span></p>
<br>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">But to be up front about this, I have not done any full scale C++ project(Although we had to modify the Linux kernel in my OS class, that was in C). However, I do believe my C++ skills are at an intermediate level, as C++, like Python, is a language in which I will spend my free time learning more about. Like vim, there is always more to learn in C++, and to that end I will watch CppCon Videos or peruse blogs such as Fluent C++(which is a treasure trove of material to nerd out on) in my free time. I also have a layman’s knowledge of CMake, from using it to configure ccls to lint C++ code with specific flags, and am aware of Google’s Test framework. Finally, I am currently taking Professor Stroustrap’s C++ class, and the compilers course here at Columbia.</span></p>
<br>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Regarding the logistics:</span></p>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">1. Do I need to submit a resume/screening/patches? </span></p>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2. Although I do have interests in certain projects posted on you website(Implement missing tab completion, createLoopPass, and PostDominatorTree), I am uncertain if I have enough expertise to decide what would be an appropriate project to contribute to given my current knowledge and experience. </span></p>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">3. The GCC GSoC website suggested checking out their source code, compiling and running their test suite. Can I do something similar for LLVM?</span></p>
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<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Anyways, thank you for taking the time to read this email, and I hope to hear back!</span></p>
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<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Best regards,</span></p>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Benson Li</span></p>
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