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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'>Thanks for the information Greg. I will look in to this further.<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'>--Sumanth G<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'> Greg Bedwell [mailto:gregbedwell@gmail.com] <br><b>Sent:</b> Monday, September 28, 2015 7:01 AM<br><b>To:</b> Hal Finkel<br><b>Cc:</b> Sumanth Gundapaneni; llvm-dev@lists.llvm.org; Russell Gallop<br><b>Subject:</b> Re: [llvm-dev] Codegen difference between Asserts and No-Asserts mode<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I imagine that the Clang "Check Compile Flow Consistency" tool (tools/clang/utils/check_cfc) would be a good fit for this sort of testing. It's currently used to verify that adding -g does not affect codegen or that compiling via a .s file produces the same codegen as a directly emitted object, so it may not be too much of a stretch to use it to verify that two different sets of compiler binaries produce identical codegen. Obviously you'd need a bot that was building both sets of executables first. Unfortunately, I don't have any time to look at doing this myself but I expect it would be worthwhile thing to do if someone wanted to pick this up.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-Greg<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 23 September 2015 at 22:48, Hal Finkel via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p class=MsoNormal>Hi Sumanth,<br><br>I don't know to what you're referring, but the output from Release vs. Release+Asserts should be identical. There might be differences in the IR value names, but if that is affecting the final result, that's a bug.<br><br> -Hal<o:p></o:p></p><div><div><p class=MsoNormal><br>----- Original Message -----<br>> From: "Sumanth Gundapaneni via llvm-dev" <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>><br>> To: <a href="mailto:llvmdev@cs.uiuc.edu">llvmdev@cs.uiuc.edu</a>, <a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a><br>> Sent: Wednesday, September 23, 2015 4:44:05 PM<br>> Subject: [llvm-dev] Codegen difference between Asserts and No-Asserts mode<br>><br>> Hi,<br>><br>> What is the guarantee that the codegen is same across Release and<br>> Release+Asserts build (except the known differences)?<br>><br>> I assume there is no guarantee and it is possible to drop a bug like<br>> this. Personally I feel it is very expensive to debug and it depends<br>> on each scenario.<br>><br>> Most of the bots test the Release+Asserts mode and any thoughts on<br>> how we can catch this sort of a problem with minimal set of changes<br>> to build infrastructure?<br>><br>> --Sumanth G<br>><br>><br>><br>><o:p></o:p></p></div></div><p class=MsoNormal>> _______________________________________________<br>> LLVM Developers mailing list<br>> <a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a><br>> <a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><br>><br><span style='color:#888888'><br><span class=hoenzb>--</span><br><span class=hoenzb>Hal Finkel</span><br><span class=hoenzb>Assistant Computational Scientist</span><br><span class=hoenzb>Leadership Computing Facility</span><br><span class=hoenzb>Argonne National Laboratory</span><br><span class=hoenzb>_______________________________________________</span><br><span class=hoenzb>LLVM Developers mailing list</span><br><span class=hoenzb><a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a></span><br><span class=hoenzb><a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a></span></span><o:p></o:p></p></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>