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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks. I’ll take a look.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regarding intrinsic functions, we want to do few trigonometric optimizations (i.e. exp(i*theta)). Not sure if that is covered in idiom recognition.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ganesh<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Stefanus Du Toit [mailto:sjdutoit@gmail.com]
<br>
<b>Sent:</b> Wednesday, April 17, 2013 7:37 PM<br>
<b>To:</b> Bikshandi, Ganesh<br>
<b>Cc:</b> llvmdev@cs.uiuc.edu<br>
<b>Subject:</b> Re: [LLVMdev] Request for compilers<o:p></o:p></span></p>
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<p class="MsoNormal">Hi Ganesh,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Please have a look at:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">These core parts of LLVM:<o:p></o:p></p>
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<p class="MsoNormal"> <a href="http://llvm.org/docs/doxygen/html/classllvm_1_1Loop.html#a72bbf45d2e00971f56bf8cfe4e1df01c">http://llvm.org/docs/doxygen/html/classllvm_1_1Loop.html#a72bbf45d2e00971f56bf8cfe4e1df01c</a><o:p></o:p></p>
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<p class="MsoNormal"> <a href="http://llvm.org/docs/Vectorizers.html">http://llvm.org/docs/Vectorizers.html</a><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">These research projects based on LLVM:<o:p></o:p></p>
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<p class="MsoNormal"> <a href="http://polly.llvm.org">http://polly.llvm.org</a><o:p></o:p></p>
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<p class="MsoNormal"> <a href="http://aesop.ece.umd.edu">http://aesop.ece.umd.edu</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm not sure what you mean by "identify intrinsic functions". If you really mean LLVM intrinsics, they are trivial to identify in LLVM (see <a href="http://llvm.org/docs/LangRef.html#intrinsic-functions">http://llvm.org/docs/LangRef.html#intrinsic-functions</a>
for a high level introduction). If you mean something like idiom recognition, some optimizations of LLVM do this but typically just recognize the idioms as they optimize.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">LLVM doesn't include loop fusion, but Polly may help there. Likewise, Polly and AESOP are probably your best bets for things like memory access patterns and auto-parallelization.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">All the best,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Stefanus<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Apr 17, 2013 at 11:32 AM, Bikshandi, Ganesh <<a href="mailto:ganesh.bikshandi@intel.com" target="_blank">ganesh.bikshandi@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">For one of our research projects, we are planning to use LLVM. We need the following features:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p>1.<span style="font-size:7.0pt"> </span>We need to aggressively fuse loops that have inter-loop dependencies.<o:p></o:p></p>
<p>2.<span style="font-size:7.0pt"> </span>We need to identify intrinsic functions and induction variables.<o:p></o:p></p>
<p>3.<span style="font-size:7.0pt"> </span>We need to detect few memory access patterns like copy, transpose-copy, stride-copy etc.
<o:p></o:p></p>
<p>4.<span style="font-size:7.0pt"> </span>Lastly, auto-vectorization and auto-openmp.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Is there a LLVM tool(s) that addresses these optimizations? The target language is C or C++. The target architectures are Intel Xeon with AVX and Xeon Phi .<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Ganesh<o:p></o:p></p>
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