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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Is it possible to turn those passes off based on optimization level?<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">My concern is that a lot of MCJIT users are much more concerned about compilation time than they are about optimization. At some point MCJIT should probably
provide a finer grained control over what does and does not happen. Right now I think setting the optimization level is the closest we come to that.<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">-Andy<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""> Juergen Ributzka [mailto:juergen@apple.com]
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<b>Sent:</b> Tuesday, January 21, 2014 6:53 PM<br>
<b>To:</b> Kaylor, Andrew<br>
<b>Cc:</b> LLVM Commits<br>
<b>Subject:</b> Re: [PATCH] Add target analysis passes to the codegen pipeline for MCJIT<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The only passes targets placed so far into “addAnalysisPasses” are the target specific TargetTransformInfo passes. They only provide more accurate answers to target hooks and cost models. Of course this might lead to different code paths
taken by optimization passes that depend on it, but I don’t know what the actual overhead of that is. <o:p></o:p></p>
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<p class="MsoNormal">On Jan 21, 2014, at 4:47 PM, Kaylor, Andrew <<a href="mailto:andrew.kaylor@intel.com">andrew.kaylor@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What’s the impact of these passes on compile time?</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><a href="mailto:llvm-commits-bounces@cs.uiuc.edu"><span style="color:purple">llvm-commits-bounces@cs.uiuc.edu</span></a><span class="apple-converted-space"> </span>[<a href="mailto:llvm-commits-bounces@cs.uiuc.edu"><span style="color:purple">mailto:llvm-commits-bounces@cs.uiuc.edu</span></a>]<span class="apple-converted-space"> </span><b>On
Behalf Of<span class="apple-converted-space"> </span></b>Juergen Ributzka<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Tuesday, January 21, 2014 10:30 AM<br>
<b>To:</b><span class="apple-converted-space"> </span>LLVM Commits<br>
<b>Subject:</b><span class="apple-converted-space"> </span>[PATCH] Add target analysis passes to the codegen pipeline for MCJIT</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt">Hi @ll,<br>
<br>
for some reason we forgot to add the target specific analysis passes to the codgen pipeline of MCJIT. All other tools (llc, etc) use these passes and so should MCJIT.<br>
<br>
This patch adds the missing passes to the codegen pipeline. It also exposes the AddAnalysisPasses method through the C API, because the optimizer passes could also benefit from it.<br>
<br>
Cheers,<br>
Juergen</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">_______________________________________________<br>
llvm-commits mailing list<br>
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<a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits"><span style="color:purple">http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits</span></a></span><o:p></o:p></p>
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