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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - crash in llvm::JumpThreadingPass::ThreadThroughTwoBasicBlocks with -O2 -fsanitize=object-size"
href="https://bugs.llvm.org/show_bug.cgi?id=44922">44922</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>crash in llvm::JumpThreadingPass::ThreadThroughTwoBasicBlocks with -O2 -fsanitize=object-size
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>keescook@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23130" name="attach_23130" title="creduced test case">attachment 23130</a> <a href="attachment.cgi?id=23130&action=edit" title="creduced test case">[details]</a></span>
creduced test case
Stack dump:
0. Program arguments: clang -O2 -fsanitize=object-size -c -o /dev/null
test
.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'test.c'.
4. Running pass 'Jump Threading' on function '@f'
#0 0x000055819d31194e llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x194a94e)
#1 0x000055819d30f694 llvm::sys::RunSignalHandlers()
(/home/kees/src/llvm-build/x86/bin/clang-11+0x1948694)
#2 0x000055819d30f911 llvm::sys::CleanupOnSignal(unsigned long)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x1948911)
#3 0x000055819d28b0a8 CrashRecoverySignalHandler(int)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x18c40a8)
#4 0x00007fa765c17540 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x15540)
#5 0x000055819cc15b88 llvm::BasicBlock::phis()
(/home/kees/src/llvm-build/x86/bin/clang-11+0x124eb88)
#6 0x000055819d10315d AddPHINodeEntriesForMappedBlock(llvm::BasicBlock*,
llvm::BasicBlock*, llvm::BasicBlock*, llvm::DenseMap<llvm::Instruction*,
llvm::Value*, llvm::DenseMapInfo<llvm::Instruction*>,
llvm::detail::DenseMapPair<llvm::Instruction*, llvm::Value*> >&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x173c15d)
#7 0x000055819d1081e5
llvm::JumpThreadingPass::ThreadThroughTwoBasicBlocks(llvm::BasicBlock*,
llvm::BasicBlock*, llvm::BasicBlock*, llvm::BasicBlock*)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x17411e5)
#8 0x000055819d108605
llvm::JumpThreadingPass::MaybeThreadThroughTwoBasicBlocks(llvm::BasicBlock*,
llvm::Value*) (/home/kees/src/llvm-build/x86/bin/clang-11+0x(llvm::BasicBlock*,
llvm::Value*) (/home/kees/src/llvm-build/x86/bin/clang-11+0x1741605)
#9 0x000055819d108bd4
llvm::JumpThreadingPass::ProcessThreadableEdges(llvm::Value*,
llvm::BasicBlock*, llvm::jumpthreading::ConstantPreference, llvm::Instruction*)
(.part.0) (/home/kees/src/llvm-build/x86/bin/clang-11+0x1741bd4)
#10 0x000055819d10c9d3 llvm::JumpThreadingPass::ProcessBlock(llvm::BasicBlock*)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x17459d3)
#11 0x000055819d10d82d llvm::JumpThreadingPass::runImpl(llvm::Function&,
llvm::TargetLibraryInfo*, llvm::LazyValueInfo*, llvm::AAResults*,
llvm::DomTreeUpdater*, bool, std::unique_ptr<llvm::BlockFrequencyInfo,
std::default_delete<llvm::BlockFrequencyInfo> >,
std::unique_ptr<llvm::BranchProbabilityInfo,
std::default_delete<llvm::BranchProbabilityInfo> >)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x174682d)
#12 0x000055819d10e1c5 (anonymous
namespace)::JumpThreading::runOnFunction(llvm::Function&) (.part.0)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x17471c5)
#13 0x000055819ccd9630 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x1312630)
#14 0x000055819fbac6cb (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x41e56cb)
#15 0x000055819ccdafa0 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x1313fa0)
#16 0x000055819d57277b 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/kees/src/llvm-build/x86/bin/clang-11+0x1bab77b)
#17 0x000055819e1971d1
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x27d01d1)
#18 0x000055819edbb709 clang::ParseAST(clang::Sema&, bool, bool)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x33f4709)
#19 0x000055819db69209 clang::FrontendAction::Execute()
(/home/kees/src/llvm-build/x86/bin/clang-11+0x21a2209)
#20 0x000055819db203bb
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x21593bb)
#21 0x000055819dc3fecb
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x2278ecb)
#22 0x000055819c325b10 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/kees/src/llvm-build/x86/bin/clang-11+0x95eb10)
#23 0x000055819c32397a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x95c97a)
#24 0x000055819d9e8529 void llvm::function_ref<void
()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
<span class="quote">>, std::__cxx11::basic_string<char, std::char_traits<char>,</span >
std::allocator<char> >*, bool*) const::'lambda'()>(long)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x2021529)
#25 0x000055819d28b1a7
llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x18c41a7)
#26 0x000055819d9e913e
clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
<span class="quote">>, std::__cxx11::basic_string<char, std::char_traits<char>,</span >
std::allocator<char> >*, bool*) const (.part.0)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x202213e)
#27 0x000055819d9bfcac
clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&,
clang::driver::Command const*&) const
(/home/kees/src/llvm-build/x86/bin/clang-11+0x1ff8cac)
#28 0x000055819d9c05a9
clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const
(/home/kees/src/llvm-build/x86/bin/clang-11+0x1ff95a9)
#29 0x000055819d9c82ef
clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&)
(/home/kees/src/llvm-build/x86/bin/clang-11+0x20012ef)
#30 0x000055819c2c29be main
(/home/kees/src/llvm-build/x86/bin/clang-11+0x8fb9be)
#31 0x00007fa76568d1e3 __libc_start_main
/build/glibc-4WA41p/glibc-2.30/csu/../csu/libc-start.c:342:3
#32 0x000055819c32355e _start
(/home/kees/src/llvm-build/x86/bin/clang-11+0x95c55e)
clang-11: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 11.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
895cad1a133a9ec5fc3ebc042491aa78256d797f)
Target: x86_64-unknown-linux-gnu
Thread model: posix</pre>
</div>
</p>
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