[llvm-bugs] [Bug 37395] New: clang crashes on valid code at -O1 and above with debugging enabled: Assertion `!cast<MDNode>(MD)->getNumOperands() && "Expected an empty MDNode"' failed
via llvm-bugs
llvm-bugs at lists.llvm.org
Wed May 9 11:51:33 PDT 2018
https://bugs.llvm.org/show_bug.cgi?id=37395
Bug ID: 37395
Summary: clang crashes on valid code at -O1 and above with
debugging enabled: Assertion
`!cast<MDNode>(MD)->getNumOperands() && "Expected an
empty MDNode"' failed
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: su at cs.ucdavis.edu
CC: llvm-bugs at lists.llvm.org
Tested with trunk vision 331844.
$ clangpolly -v
clang version 7.0.0 (http://llvm.org/git/clang.git
49d557c3652a0113159c2d4442391835a2e220e3) (llvm/trunk 331844)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/su/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.4
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.2.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clangpolly -O1 -c small.c
$ clangpolly -O0 -g -c small.c
$
$ clangpolly -O1 -g -c small.c
clang-6.0: /home/su/software/tmp/polly/llvm/lib/IR/IntrinsicInst.cpp:47:
llvm::Value* llvm::DbgInfoIntrinsic::getVariableLocation(bool) const: Assertion
`!cast<MDNode>(MD)->getNumOperands() && "Expected an empty MDNode"' failed.
Stack dump:
0. Program arguments: /home/su/software/tmp/polly/llvm_build/bin/clang-6.0
-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name
small.c -mrelocation-model static -mthread-model posix -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu x86-64 -dwarf-column-info -debug-info-kind=limited -dwarf-version=4
-debugger-tuning=gdb -momit-leaf-frame-pointer -coverage-notes-file
/home/su/specres/good/20180509-clangpolly-m32-O3-g-build-085458/delta/small.gcno
-resource-dir /home/su/software/tmp/polly/llvm_build/lib/clang/7.0.0
-internal-isystem /usr/local/include -internal-isystem
/home/su/software/tmp/polly/llvm_build/lib/clang/7.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O1
-fdebug-compilation-dir
/home/su/specres/good/20180509-clangpolly-m32-O3-g-build-085458/delta
-ferror-limit 19 -fmessage-length 116 -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -o small.o -x c small.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'small.c'.
4. Running pass 'Loop-Closed SSA Form Pass' on function '@f'
#0 0x000000000254b29a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/home/su/software/tmp/polly/llvm/lib/Support/Unix/Signals.inc:403:0
#1 0x000000000254944e llvm::sys::RunSignalHandlers()
/home/su/software/tmp/polly/llvm/lib/Support/Signals.cpp:50:0
#2 0x00000000025495b0 SignalHandler(int)
/home/su/software/tmp/polly/llvm/lib/Support/Unix/Signals.inc:243:0
#3 0x00007f5f940e5330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007f5f92ecdc37 gsignal
/build/eglibc-SvCtMH/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f5f92ed1028 abort
/build/eglibc-SvCtMH/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f5f92ec6bf6 __assert_fail_base
/build/eglibc-SvCtMH/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f5f92ec6ca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x000000000207ac0f
(/home/su/software/tmp/polly/llvm_build/bin/clang-6.0+0x207ac0f)
#9 0x00000000025b91bd dyn_cast_or_null<llvm::PHINode, llvm::Value>
/home/su/software/tmp/polly/llvm/include/llvm/Support/Casting.h:359:0
#10 0x00000000025b91bd llvm::insertDebugValuesForPHIs(llvm::BasicBlock*,
llvm::SmallVectorImpl<llvm::PHINode*>&)
/home/su/software/tmp/polly/llvm/lib/Transforms/Utils/Local.cpp:1375:0
#11 0x00000000025a5bd6 llvm::SmallVectorTemplateCommon<llvm::PHINode*,
void>::isSmall() const
/home/su/software/tmp/polly/llvm/include/llvm/ADT/SmallVector.h:89:0
#12 0x00000000025a5bd6 ~SmallVectorImpl
/home/su/software/tmp/polly/llvm/include/llvm/ADT/SmallVector.h:344:0
#13 0x00000000025a5bd6 ~SmallVector
/home/su/software/tmp/polly/llvm/include/llvm/ADT/SmallVector.h:872:0
#14 0x00000000025a5bd6
llvm::formLCSSAForInstructions(llvm::SmallVectorImpl<llvm::Instruction*>&,
llvm::DominatorTree&, llvm::LoopInfo&)
/home/su/software/tmp/polly/llvm/lib/Transforms/Utils/LCSSA.cpp:220:0
#15 0x00000000025a6b35 llvm::formLCSSA(llvm::Loop&, llvm::DominatorTree&,
llvm::LoopInfo*, llvm::ScalarEvolution*)
/home/su/software/tmp/polly/llvm/lib/Transforms/Utils/LCSSA.cpp:334:0
#16 0x00000000025a6eef llvm::formLCSSARecursively(llvm::Loop&,
llvm::DominatorTree&, llvm::LoopInfo*, llvm::ScalarEvolution*)
/home/su/software/tmp/polly/llvm/lib/Transforms/Utils/LCSSA.cpp:353:0
#17 0x00000000025a7565 formLCSSAOnAllLoops
/home/su/software/tmp/polly/llvm/lib/Transforms/Utils/LCSSA.cpp:360:0
#18 0x00000000025a7565 (anonymous
namespace)::LCSSAWrapperPass::runOnFunction(llvm::Function&)
/home/su/software/tmp/polly/llvm/lib/Transforms/Utils/LCSSA.cpp:432:0
#19 0x000000000209571b llvm::FPPassManager::runOnFunction(llvm::Function&)
/home/su/software/tmp/polly/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#20 0x0000000001b33036 RunPassOnSCC
/home/su/software/tmp/polly/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#21 0x0000000001b33036 RunAllPassesOnSCC
/home/su/software/tmp/polly/llvm/lib/Analysis/CallGraphSCCPass.cpp:424:0
#22 0x0000000001b33036 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
/home/su/software/tmp/polly/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#23 0x000000000209642a runOnModule
/home/su/software/tmp/polly/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#24 0x000000000209642a llvm::legacy::PassManagerImpl::run(llvm::Module&)
/home/su/software/tmp/polly/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#25 0x0000000002700a8d ~PrettyStackTraceString
/home/su/software/tmp/polly/llvm/include/llvm/Support/PrettyStackTrace.h:52:0
#26 0x0000000002700a8d (anonymous
namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
/home/su/software/tmp/polly/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:815:0
#27 0x0000000002701f64 ~unique_ptr /usr/include/c++/4.9/bits/unique_ptr.h:235:0
#28 0x0000000002701f64 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout
const&, llvm::Module*, clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
/home/su/software/tmp/polly/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1222:0
#29 0x0000000002f6519c ~unique_ptr /usr/include/c++/4.9/bits/unique_ptr.h:235:0
#30 0x0000000002f6519c
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
/home/su/software/tmp/polly/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:294:0
#31 0x00000000034876bc clang::ParseAST(clang::Sema&, bool, bool)
/home/su/software/tmp/polly/llvm/tools/clang/lib/Parse/ParseAST.cpp:164:0
#32 0x0000000002f64630 clang::CodeGenAction::ExecuteAction()
/home/su/software/tmp/polly/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1044:0
#33 0x0000000002b0b336 clang::FrontendAction::Execute()
/home/su/software/tmp/polly/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:904:0
#34 0x0000000002addbd6
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
/home/su/software/tmp/polly/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:990:0
#35 0x0000000002ba42c1
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
/home/su/software/tmp/polly/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:255:0
#36 0x0000000000e06e50 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*)
/home/su/software/tmp/polly/llvm/tools/clang/tools/driver/cc1_main.cpp:222:0
#37 0x0000000000d89e21 ExecuteCC1Tool
/home/su/software/tmp/polly/llvm/tools/clang/tools/driver/driver.cpp:310:0
#38 0x0000000000d89e21 main
/home/su/software/tmp/polly/llvm/tools/clang/tools/driver/driver.cpp:382:0
#39 0x00007f5f92eb8f45 __libc_start_main
/build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:321:0
#40 0x0000000000e02c49 _start
(/home/su/software/tmp/polly/llvm_build/bin/clang-6.0+0xe02c49)
clang-6.0: error: unable to execute command: Aborted (core dumped)
clang-6.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 7.0.0 (http://llvm.org/git/clang.git
49d557c3652a0113159c2d4442391835a2e220e3) (llvm/trunk 331844)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/su/bin
clang-6.0: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang-6.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-6.0: note: diagnostic msg: /tmp/small-ed4538.c
clang-6.0: note: diagnostic msg: /tmp/small-ed4538.sh
clang-6.0: note: diagnostic msg:
********************
$
----------------------
int a;
void f ()
{
for (; a; a++)
L:;
}
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