<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 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
@font-face
{font-family:"MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"\@MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.gmail-m8414179737728410099m5177994139836787745gmail-hoenzb
{mso-style-name:gmail-m_8414179737728410099m_5177994139836787745gmail-hoenzb;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</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">Please file a bug with this example. I think the verifier ought to catch this kind of thing.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></a></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<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""> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Andrew Kelley via llvm-dev<br>
<b>Sent:</b> Wednesday, November 15, 2017 7:36 AM<br>
<b>To:</b> UE US<br>
<b>Cc:</b> LLVM Dev<br>
<b>Subject:</b> Re: [llvm-dev] workaround for debug info bug?<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Thanks for the repros.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I think this line may be the problem:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<div>
<p class="MsoNormal"><span style="font-size:9.5pt">!30 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "Foo", scope: !30, file: !5, line: 1, size: 32, align: 32, elements: !31)<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The scope is itself. I'll investigate this in the frontend.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Wed, Nov 15, 2017 at 9:29 AM, UE US 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" style="margin-bottom:12.0pt">It reproduces with trunk on linux here as well.
<br>
<br>
...<br>
#231 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#232 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#233 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#234 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#235 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#236 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#237 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#238 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#239 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#240 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#241 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#242 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#243 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#244 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#245 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#246 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#247 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#248 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#249 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#250 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#251 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#252 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#253 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
#254 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0<br>
#255 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0<br>
Stack dump:<br>
0. Program arguments: /usr/local/bin/clang-6.0 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name test.ll -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases
-munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -coverage-notes-file /home/jimshinns/test.gcno -resource-dir /usr/local/lib/clang/6.0.0 -fdebug-compilation-dir /home/jimshinns -ferror-limit 19 -fmessage-length 80
-fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o test.o -x ir test.ll
<br>
1. Code generation<br>
clang-6.0: error: unable to execute command: Segmentation fault (core dumped)<br>
clang-6.0: error: clang frontend command failed due to signal (use -v to see invocation)<br>
clang version 6.0.0 (trunk 318165)<br>
Target: x86_64-unknown-linux-gnu<br>
Thread model: posix<br>
InstalledDir: /usr/local/bin<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal">GNOMETOYS<o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Wed, Nov 15, 2017 at 2:00 AM, Nemanja Ivanovic 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>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Seems like something infinite-recursion like to me:<br>
<span style="font-family:"Courier New"">$ clang --version<br>
clang version 6.0.0 (trunk 317833)<br>
Target: powerpc64le-unknown-linux-gnu<br>
$ clang -c test.ll<br>
warning: overriding the module target triple with powerpc64le-unknown-linux-gnu [-Woverride-module]<br>
...<br>
#255 0x0000000012b07a78 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*)<br>
...</span><o:p></o:p></p>
</div>
<p class="MsoNormal">So I'd say it reproduces.<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<div>
<p class="MsoNormal">On Wed, Nov 15, 2017 at 6:20 AM, <span style="font-family:"MS Gothic"">
陳韋任</span> 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>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Test on Mac, with not latest but trunk code. I get error below:<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
</div>
<blockquote style="margin-left:30.0pt;margin-right:0in;border-color:currentcolor">
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">$ clang -c test.ll<br>
warning: overriding the module target triple with x86_64-apple-macosx10.13.0 [-Woverride-module]</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">clang-6.0: error: unable to execute command: Illegal instruction: 4</span><o:p></o:p></p>
</div>
</blockquote>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I see no infinite recursion here.<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span class="gmail-m8414179737728410099m5177994139836787745gmail-hoenzb"><span style="color:#888888"><o:p> </o:p></span></span></p>
<div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal"><span style="color:#888888">-- <o:p></o:p></span></p>
<div>
<div>
<div>
<p class="MsoNormal"><span style="color:#888888">Wei-Ren Chen (</span><span style="font-family:"MS Gothic";color:#888888">陳韋任</span><span style="color:#888888">)<br>
Homepage: <a href="https://people.cs.nctu.edu.tw/%7Echenwj" target="_blank">https://people.cs.nctu.edu.tw/~chenwj</a><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<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>
</blockquote>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</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" 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>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</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>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</div>
</div>
</div>
</body>
</html>