<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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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'>Yes, it does for us. My tree is couple days off the tip, and I see it there.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Sergei<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><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'> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org] <b>On Behalf Of </b>Keno Fischer via llvm-dev<br><b>Sent:</b> Thursday, June 15, 2017 1:25 PM<br><b>To:</b> Adrian Prantl <aprantl@apple.com><br><b>Cc:</b> llvm-dev <llvm-dev@lists.llvm.org><br><b>Subject:</b> Re: [llvm-dev] CloneFunctionInto produces invalid debug info<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>This all looks very similar to a bug in the cloning stuff I fixed recently, so would be indeed good to know if this is still happening on master.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Thu, Jun 15, 2017 at 2:23 PM, Adrian Prantl 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'><div><p class=MsoNormal>If you are doing this work based off LLVM trunk, could you send me your patch to reproduce the problem?<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-- adrian<o:p></o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div><p class=MsoNormal>On Jun 15, 2017, at 8:31 AM, Matthias Bernad 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></div><p class=MsoNormal><o:p> </o:p></p></div></div><div><div><div><div><p class=MsoNormal>Hi!<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>We are currently working on a science project and implemented a FunctionPass that clones a function (more precisely a constructor of a struct/class) and adds a parameter.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>First, we create a new function with a new function type, which includes the newly added parameter:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><blockquote style='margin-left:30.0pt;margin-right:0in'><div><p class=MsoNormal>Function *NF = Function::Create(NewFTy, F.getLinkage(), F.getName() + "Cloned", F.getParent());<o:p></o:p></p></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>and after setting up the ValueToValueMapTy, we use the CloneFunctionInto method to clone the function body<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>CloneFunctionInto(NF, &F, Map, true, Returns, "Cloned");<o:p></o:p></p></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>The code seems to work as intended, but when we try to emit debug symbols (clang -g flag) the pass fails with following message:<o:p></o:p></p></div><blockquote style='margin-left:30.0pt;margin-right:0in'><div><p class=MsoNormal>"All DICompileUnits must be listed in <a href="http://llvm.dbg.cu/" target="_blank">llvm.dbg.cu</a>"<o:p></o:p></p></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Nevertheless, we can dump the Module and therefore can print out the annotated IR.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This is what the function to be cloned looks like:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>; Function Attrs: noinline nounwind uwtable<o:p></o:p></p></div></div><div><div><p class=MsoNormal>define linkonce_odr void @_ZN12MyFunnyClassC2Ev(%struct.MyFunnyClass* %this) unnamed_addr #4 comdat align 2 !dbg !46 {<o:p></o:p></p></div></div><div><div><p class=MsoNormal>entry:<o:p></o:p></p></div></div><div><div><p class=MsoNormal> %this.addr = alloca %struct.MyFunnyClass*, align 8<o:p></o:p></p></div></div><div><div><p class=MsoNormal> store %struct.MyFunnyClass* %this, %struct.MyFunnyClass** %this.addr, align 8<o:p></o:p></p></div></div><div><div><p class=MsoNormal> call void @llvm.dbg.declare(metadata %struct.MyFunnyClass** %this.addr, metadata !49, metadata !31), !dbg !50<o:p></o:p></p></div></div></blockquote><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>... rest of function code<o:p></o:p></p></div></div></blockquote><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>}<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal>!46 = distinct !DISubprogram(name: "MyFunnyClass", linkageName: "_ZN12MyFunnyClassC2Ev", scope: !15, file: !1, line: 1, type: !25, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !47, variables: !2)<o:p></o:p></p></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>and the cloned function:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>; Function Attrs: noinline nounwind uwtable<o:p></o:p></p></div></div><div><div><p class=MsoNormal>define linkonce_odr void @_ZN12MyFunnyClassC2EvCloned(%struct.MyFunnyClass* %this, { [6 x i8*] }* %newparam) unnamed_addr #4 align 2 !dbg !73 {<o:p></o:p></p></div></div><div><div><p class=MsoNormal>entry:<o:p></o:p></p></div></div><div><div><p class=MsoNormal> %this.addr = alloca %struct.MyFunnyClass*, align 8<o:p></o:p></p></div></div><div><div><p class=MsoNormal> store %struct.MyFunnyClass* %this, %struct.MyFunnyClass** %this.addr, align 8<o:p></o:p></p></div></div><div><div><p class=MsoNormal> call void @llvm.dbg.declare(metadata %struct.MyFunnyClass** %this.addr, metadata !89, metadata !31), !dbg !91<o:p></o:p></p></div></div></blockquote><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>... rest of function code<o:p></o:p></p></div></div></blockquote><blockquote style='margin-left:30.0pt;margin-right:0in'><div><div><p class=MsoNormal>}<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal>!73 = distinct !DISubprogram(name: "MyFunnyClass", linkageName: "_ZN12MyFunnyClassC2Ev", scope: !74, file: !1, line: 1, type: !81, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !87, declaration: !88, variables: !2)<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div></blockquote><p class=MsoNormal>So the cloned function gets annotated with debug symbols as expected. We noticed that the linkageName of the cloned function is the same as the original one's. Could that cause the error mentioned above? If so, how can we fix that error?<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Best regards and thanks in advance,<o:p></o:p></p></div><div><p class=MsoNormal>Matthias<o:p></o:p></p></div></div></div></div><p class=MsoNormal>_______________________________________________<br>LLVM Developers mailing list<br><a href="mailto:llvm-dev@lists.llvm.org" target="_blank">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><o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<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><o:p></o:p></p></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>