[llvm-dev] workaround for debug info bug? (original) (raw)

Robinson, Paul via llvm-dev llvm-dev at lists.llvm.org
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>

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