Extended Description

When building the Hexagon Linux kernel's allmodconfig target, there is a crash in the device mapper driver: ClangBuiltLinux/linux#1410

A reducer reproducer:

$ cat dm-bitset.i
dm_bitset_resize_new_root(*, long long, old_nr_entries, new_nr_entries,
_Bool default_value) {
long long value = default_value ? ~0 : 0;
dm_array_resize(value);
}

$ clang --target=hexagon-linux -O0 -c -o /dev/null dm-bitset.i
...

$ clang --target=hexagon-linux -O1 -c -o /dev/null dm-bitset.i
...
fatal error: error in backend: Cannot select: t28: i64,ch = load<(load 1 from %fixed-stack.0, align 8), sext from i1> t0, FrameIndex:i32<-1>, undef:i32
t9: i32 = FrameIndex<-1>
t10: i32 = undef
In function: dm_bitset_resize_new_root
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang --target=hexagon-linux -O1 -c -o /dev/null dm-bitset.i

1.  <eof> parser at end of file
   

2.  Code generation
   

3.  Running pass 'Function Pass Manager' on module 'dm-bitset.i'.
   

4.  Running pass 'Hexagon DAG->DAG Pattern Instruction Selection' on function '@dm_bitset_resize_new_root'
   

#​0 0x000000000301dd53 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x301dd53)
#​1 0x000000000301bb9e llvm::sys::RunSignalHandlers() (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x301bb9e)
#​2 0x0000000002fa53f3 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) CrashRecoveryContext.cpp:0:0
#​3 0x0000000002fa536f llvm::CrashRecoveryContext::HandleExit(int) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2fa536f)
#​4 0x00000000030180c7 llvm::sys::Process::Exit(int, bool) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x30180c7)
#​5 0x0000000001b28860 llvm::DenseMapBase<llvm::DenseMap<llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSet::PointerRec*, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSet::PointerRec*> >, llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSet::PointerRec*, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSet::PointerRec*> >::destroyAll() cc1_main.cpp:0:0
#​6 0x0000000002fa9c42 llvm::report_fatal_error(llvm::Twine const&, bool) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2fa9c42)
#​7 0x0000000002fa9d17 (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2fa9d17)
#​8 0x0000000003e5f42e llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3e5f42e)
#​9 0x0000000003e5e3fc llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3e5e3fc)
#​10 0x0000000001c66c1f llvm::HexagonDAGToDAGISel::SelectLoad(llvm::SDNode*) HexagonISelDAGToDAG.cpp:0:0
#​11 0x0000000003e5509e llvm::SelectionDAGISel::DoInstructionSelection() (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3e5509e)
#​12 0x0000000003e53f13 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3e53f13)
#​13 0x0000000003e5183e llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3e5183e)
#​14 0x0000000003e4e0c1 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3e4e0c1)
#​15 0x0000000001c72a74 llvm::HexagonDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) HexagonISelDAGToDAG.cpp:0:0
#​16 0x0000000002375ccd llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2375ccd)
#​17 0x00000000027fd3e8 llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x27fd3e8)
#​18 0x00000000028058b1 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x28058b1)
#​19 0x00000000027fdee1 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x27fdee1)
#​20 0x00000000036f6c0f (anonymous namespace)::EmitAssemblyHelper::EmitAssemblyWithNewPassManager(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_deletellvm::raw_pwrite_stream >) BackendUtil.cpp:0:0
#​21 0x00000000036f136c clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_deletellvm::raw_pwrite_stream >) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x36f136c)
#​22 0x0000000003a29980 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) CodeGenAction.cpp:0:0
#​23 0x00000000041459b4 clang::ParseAST(clang::Sema&, bool, bool) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x41459b4)
#​24 0x000000000397e1e0 clang::FrontendAction::Execute() (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x397e1e0)
#​25 0x00000000038f193f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x38f193f)
#​26 0x0000000003a23a07 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3a23a07)
#​27 0x0000000001b28538 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1b28538)
#​28 0x0000000001b2608d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#​29 0x00000000037940b2 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1>(long) Job.cpp:0:0
#​30 0x0000000002fa5307 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2fa5307)
#​31 0x0000000003793c17 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3793c17)
#​32 0x000000000375bca8 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x375bca8)
#​33 0x000000000375bf77 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x375bf77)
#​34 0x0000000003774641 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3774641)
#​35 0x0000000001b25956 main (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1b25956)
#​36 0x00007f8975e52b25 __libc_start_main (/usr/lib/libc.so.6+0x27b25)
#​37 0x0000000001b22cfe _start (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1b22cfe)
clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
ClangBuiltLinux clang version 13.0.0 (https://github.com/llvm/llvm-project a9f3ac9)
Target: hexagon-unknown-linux
Thread model: posix
InstalledDir: /home/nathan/cbl/github/tc-build/build/llvm/stage1/bin
clang-13: note: diagnostic msg: Error generating preprocessed source(s) - no preprocessable inputs.