[llvm-dev] workaround for debug info bug?

Wed Nov 15 11:38:47 PST 2017

Please file a bug with this example.  I think the verifier ought to catch this kind of thing.
--paulr

From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Andrew Kelley via llvm-dev
Sent: Wednesday, November 15, 2017 7:36 AM
To: UE US
Cc: LLVM Dev
Subject: Re: [llvm-dev] workaround for debug info bug?

Thanks for the repros.

I think this line may be the problem:

!30 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "Foo", scope: !30, file: !5, line: 1, size: 32, align: 32, elements: !31)

The scope is itself. I'll investigate this in the frontend.

On Wed, Nov 15, 2017 at 9:29 AM, UE US via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:
It reproduces with trunk on linux here as well.

...
#231 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#232 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#233 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#234 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#235 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#236 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#237 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#238 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#239 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#240 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#241 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#242 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#243 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#244 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#245 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#246 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#247 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#248 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#249 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#250 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#251 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#252 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#253 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
#254 0x0000000004c5faf2 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:714:0
#255 0x0000000004c5f822 llvm::DwarfUnit::getOrCreateContextDIE(llvm::DIScope const*) /home/jimshinns/llvm-6.0-src/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:671:0
Stack dump:
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
1.    Code generation
clang-6.0: error: unable to execute command: Segmentation fault (core dumped)
clang-6.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 6.0.0 (trunk 318165)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin

GNOMETOYS

On Wed, Nov 15, 2017 at 2:00 AM, Nemanja Ivanovic via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:
Seems like something infinite-recursion like to me:
$ clang --version
clang version 6.0.0 (trunk 317833)
Target: powerpc64le-unknown-linux-gnu
$ clang -c test.ll
warning: overriding the module target triple with powerpc64le-unknown-linux-gnu [-Woverride-module]
...
#255 0x0000000012b07a78 llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*)
...
So I'd say it reproduces.

On Wed, Nov 15, 2017 at 6:20 AM, 陳韋任 via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:
Test on Mac, with not latest but trunk code. I get error below:

$ clang -c test.ll
warning: overriding the module target triple with x86_64-apple-macosx10.13.0 [-Woverride-module]
clang-6.0: error: unable to execute command: Illegal instruction: 4

I see no infinite recursion here.

--
Wei-Ren Chen (陳韋任)
Homepage: https://people.cs.nctu.edu.tw/~chenwj<https://people.cs.nctu.edu.tw/%7Echenwj>

_______________________________________________
LLVM Developers mailing list
llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

_______________________________________________
LLVM Developers mailing list
llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

_______________________________________________
LLVM Developers mailing list
llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20171115/de73b46c/attachment.html>