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<p class="MsoNormal">Hi everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am very interested in contributing to LLVM project in this year’s GSoC. I am new with LLVM, but this is used in the compiler course in my university. So, I am thinking to involve in LLVM development to have a better knowledge of the system.
Currently, I am preparing the proposal. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">One of the project that caught my eyes is “New Transformations and Analysis”. Several code transformations and analyses have been introduced in the compiler course that I am currently taking. That’s why I am thinking to involve in writing
some new transformations and code analyses. But the list of transformations in the LLVM Open Projects web page seems too brief for me and I need more details on those stuffs.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Loop Dependence Analysis Infrastructure. </b>I have looked in the source codes repo and I saw that there is a file named “DependenceAnalysis.cpp”. So, does that mean this analysis has been implemented?
<o:p></o:p></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>Value range propagation pass. </b>There was a discussion about this topic (<a href="https://groups.google.com/forum/#!topic/llvm-dev/XXqfemtDX74/discussion">https://groups.google.com/forum/#!topic/llvm-dev/XXqfemtDX74/discussion</a>).
Someone already proposed to do this pass for several years ago GSoC. But I can’t find the progress of the work. If no progress, then does it mean that the VRP based on Patterson’s paper need to be implemented although range analysis has been implemented?<o:p></o:p></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>Predictive Commoning. </b>The presentation side by Arie Tal seems provide quite clear explanation and examples of the algorithm. I guess the implementation should be straightforward, isn’t it?<o:p></o:p></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>Type Inference (aka. Devirtualization) and Value assertions.
</b><o:p></o:p></p>
<p class="MsoNormal">Can I get more details of these topics? Does the type inference mean the translation of
<u>auto</u> keyword or something else? For value assertions, “unreachable” intrinsic seems has been implemented cause I can find the usage in some of the testcases.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Finally, for this project, must I propose to do all of these analyses and transformations in my GSoC proposal or can I just propose some of them? In addition, I am also looking for a mentor for guidance?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Looking forward for your comments and feedbacks.<o:p></o:p></p>
<p class="MsoNormal">Thank you.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Aries Thio.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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