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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hi Piotr,<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'>You may be interested in a recent patch I posted: <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__reviews.llvm.org_D11043&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=SM95Rrga3wqiSwa9WS3CxNB3y_jkKCD5gTzpMLPMycE&s=8oo8xfmoV4aR7vgWEI8QYnNX6B-LPbc8L65Q0mWlj-o&e=">http://reviews.llvm.org/D11043</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>This patch addresses a de-virtualization case that I’m not sure would be handled by your current proposal, namely that of a virtual call where the ‘this’ object is a global variable.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>For example:<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'>struct A {<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> A();<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> virtual void foo();<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'>void g(A * a) {<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> a->foo();<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'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>A a;<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>int main() {<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> g(&a);<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'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>It might be worth considering if your approach could be extended to handle this case.<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><div style='mso-element:para-border-div;border:dashed #2F6FAB 1.0pt;padding:12.0pt 12.0pt 12.0pt 12.0pt;background:#F9F9F9'><p class=MsoNormal style='line-height:15.6pt;background:#F9F9F9;border:none;padding:0in'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>--<o:p></o:p></span></p><p class=MsoNormal style='line-height:15.6pt;background:#F9F9F9;border:none;padding:0in'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Geoff Berry<o:p></o:p></span></p><p class=MsoNormal style='line-height:15.6pt;background:#F9F9F9;border:none;padding:0in'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Employee of Qualcomm Innovation Center, Inc.<o:p></o:p></span></p><p class=MsoNormal style='line-height:15.6pt;background:#F9F9F9;border:none;padding:0in'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project<o:p></o:p></span></p></div><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><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> llvmdev-bounces@cs.uiuc.edu [mailto:llvmdev-bounces@cs.uiuc.edu] <b>On Behalf Of </b>Piotr Padlewski<br><b>Sent:</b> Wednesday, July 22, 2015 5:56 PM<br><b>To:</b> cfe-dev@cs.uiuc.edu Developers; llvmdev@cs.uiuc.edu<br><b>Subject:</b> [LLVMdev] Clang devirtualization proposal<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Hi folks,<o:p></o:p></p></div><div><p class=MsoNormal>this summer I will work with Richard Smith on clang devirtualization. Check out our proposal:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.google.com_document_d_1f2SGa4TIPuBGm6y6YO768GrQsA8awNfGEJSBFukLhYA_edit-3Fusp-3Dsharing&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=Mfk2qtn1LTDThVkh6-oGglNfMADXfJdty4_bhmuhMHA&m=-sGvXxkjadRLtXcTi4kOVPumoH-0XOKmk_vgUTcYugY&s=hHoo6tgC-NooXdIwbBwT_D8sIw8fcYF4XvBRI8Lr9Eg&e=">https://docs.google.com/document/d/1f2SGa4TIPuBGm6y6YO768GrQsA8awNfGEJSBFukLhYA/edit?usp=sharing</a><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>And modified LangRef<o:p></o:p></p></div><div><p class=MsoNormal><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__reviews.llvm.org_D11399&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=Mfk2qtn1LTDThVkh6-oGglNfMADXfJdty4_bhmuhMHA&m=-sGvXxkjadRLtXcTi4kOVPumoH-0XOKmk_vgUTcYugY&s=L6_vdinD06uAwgm4OJGL5QxKw8Tzfa_4DxPwf3Zj704&e=">http://reviews.llvm.org/D11399</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>You can also check out previous disscussion that was started before our proposal was ready - <a href="http://lists.cs.uiuc.edu/pipermail/cfe-dev/2015-July/044052.html">http://lists.cs.uiuc.edu/pipermail/cfe-dev/2015-July/044052.html</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards<o:p></o:p></p></div><div><p class=MsoNormal>Piotr Padlewski<o:p></o:p></p></div></div></div></body></html>