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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Basically I wanted to see if hot blocks are ending up with copies, when we may have been better off having copies in a cold pred or cold succ etc<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""> Umesh Kalappa [mailto:umesh.kalappa0@gmail.com]
<br>
<b>Sent:</b> Monday, August 27, 2012 11:27 AM<br>
<b>To:</b> Rafael Espíndola<br>
<b>Cc:</b> Ramanarayanan, Ramshankar; llvmdev@cs.uiuc.edu<br>
<b>Subject:</b> Re: [LLVMdev] info on coming out of SSA form<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi RamShankar,<br>
<br>
On top of Rafael mentioned ,Please check with <br>
<br>
lib/CodeGen/StrongPHIElimination.cpp and the papers like <br>
<br>
Budimlic, et al. Fast copy coalescing and live-range identification.<br>
// In Proceedings of the ACM SIGPLAN 2002 Conference on Programming Language<br>
// Design and Implementation (Berlin, Germany, June 17 - 19, 2002).<br>
// PLDI '02. ACM, New York, NY, 25-32.<br>
Boissinot, et al. Revisiting Out-of-SSA Translation for Correctness, Code<br>
// Quality and Efficiency,<br>
// In Proceedings of the 7th annual IEEE/ACM International Symposium on Code<br>
// Generation and Optimization (Seattle, Washington, March 22 - 25, 2009).<br>
// CGO '09. IEEE, Washington, DC, 114-125.<br>
<br>
It will be good ,If you mention the what are trying to achieve here ..<br>
<br>
Thanks <br>
~Umesh <br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">On Sun, Aug 26, 2012 at 9:13 PM, Rafael Espíndola <<a href="mailto:rafael.espindola@gmail.com" target="_blank">rafael.espindola@gmail.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">On 24 August 2012 02:27, Ramanarayanan, Ramshankar<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><<a href="mailto:Ramshankar.Ramanarayanan@amd.com" target="_blank">Ramshankar.Ramanarayanan@amd.com</a>> wrote:<br>
> Hi,<br>
><br>
><br>
><br>
> I am a newbie to llvm. I am wondering what approach is used when coming out<br>
> of SSA form. I also appreciate pointers on where to look in the source code<br>
> for this phase.<br>
><o:p></o:p></p>
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<p class="MsoNormal">lib/CodeGen/PHIElimination.cpp is probably what you want.<br>
<br>
><br>
> Best regards,<br>
><br>
> Ram Ramshankar<br>
><br>
<br>
Cheers,<br>
Rafael<br>
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