nathanchance wrote:
I bisected a crash that I see when running `check-clang` to this change.
```
# bad: [9ff30d4f1c2595f038c4c0cf873387a0c32c7c7b] MCParse: Disallow @ specifier
in symbol equating
# good: [fbbae9ea2bd1c89e39deb62c8a2f549a33e51fae] [LoongArch] Only report the
first range error if there is actually more than one for
__builtin_loongarch_cacop_[wd]
git bisect start '9ff30d4f1c2595f038c4c0cf873387a0c32c7c7b'
'fbbae9ea2bd1c89e39deb62c8a2f549a33e51fae'
# bad: [8eadbea8e3aac52608880f0e0ae64e8403f2609f] [HLSL] Diagnose overlapping
resource bindings (#140982)
git bisect bad 8eadbea8e3aac52608880f0e0ae64e8403f2609f
# bad: [aaa9c19328b23319eb1b50789d9478f31dee09b1] [LLDB] Remove redundant check
in DemangledNameInfo::hasBasename (#142139)
git bisect bad aaa9c19328b23319eb1b50789d9478f31dee09b1
# bad: [37edd2c1c32bf7599af28b96ae5adf909e96fc58] [X86]
combineEXTRACT_SUBVECTOR - generalize extract_subvector(broadcast(x),c) fold
with IsElementEquivalent (#141963)
git bisect bad 37edd2c1c32bf7599af28b96ae5adf909e96fc58
# good: [1e81e800508fbec5bdd394754e6005af536aa2f3] [IR] Avoid UB in
`SymbolTableListTraits` (#139096)
git bisect good 1e81e800508fbec5bdd394754e6005af536aa2f3
# good: [d490526a81586c7b2fe674ce520276570c9881e2] [clangd] [Modules] Fixes to
correctly handle module dependencies (#142090)
git bisect good d490526a81586c7b2fe674ce520276570c9881e2
# good: [b71255705bab3bba231c045a9fd101df438a7a72] [libc++] P2165R4: Update
deduction guides for map containers and container adaptors (#136011)
git bisect good b71255705bab3bba231c045a9fd101df438a7a72
# bad: [417e43ad43d706c8a932adf702a55de97e65fb37] [LV] Set PhiTy once in
adjustRecipesForReductions (NFC).
git bisect bad 417e43ad43d706c8a932adf702a55de97e65fb37
# bad: [c7b8d6e1dcb0a277f95496cbc6bb27143afb80a6] [Clang] Add resource_dir_EQ
flag to CC1Option group (#140870)
git bisect bad c7b8d6e1dcb0a277f95496cbc6bb27143afb80a6
# first bad commit: [c7b8d6e1dcb0a277f95496cbc6bb27143afb80a6] [Clang] Add
resource_dir_EQ flag to CC1Option group (#140870)
```
```
$ git sh -s --format='%h ("%s")'
832a7bb46061 ("[AArch64] Add missing Neon Types (#126945)")
$ cmake \
-B build \
-G Ninja \
-S llvm \
-Wno-dev \
-DCLANG_ENABLE_STATIC_ANALYZER=OFF \
-DCLANG_PLUGIN_SUPPORT=OFF \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_CXX_COMPILER=clang++ \
-DCMAKE_C_COMPILER=clang \
-DLLVM_ENABLE_ASSERTIONS=ON \
-DLLVM_ENABLE_BINDINGS=OFF \
-DLLVM_ENABLE_LIBXML2=OFF \
-DLLVM_ENABLE_OCAMLDOC=OFF \
-DLLVM_ENABLE_PROJECTS=clang \
-DLLVM_ENABLE_WARNINGS=OFF \
-DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR= \
-DLLVM_INCLUDE_DOCS=OFF \
-DLLVM_INCLUDE_EXAMPLES=OFF \
-DLLVM_USE_LINKER=lld
and ninja -C build check-clang
...
[----------] 1 test from Rewriter
[ RUN ] Rewriter.ReplaceTextRangeTypes
[ OK ] Rewriter.ReplaceTextRangeTypes (2 ms)
[----------] 1 test from Rewriter (2 ms total)
[----------] 1 test from ClangToolTest
[ RUN ] ClangToolTest.StripDependencyFileAdjusterShowIncludes
[ OK ] ClangToolTest.StripDependencyFileAdjusterShowIncludes (2 ms)
[----------] 1 test from ClangToolTest (2 ms total)
[----------] 1 test from CodeGenTest
[ RUN ] CodeGenTest.TestNonAlterTest
AllClangUnitTests:
.../llvm-project/llvm/lib/CodeGen/CodeGenTargetMachineImpl.cpp:48: void
llvm::CodeGenTargetMachineImpl::initAsmInfo(): Assertion `MRI && "Unable to
create reg info"' failed.
#0 0x000055f7c928d468 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x5ebb468)
#1 0x000055f7c928b0cc llvm::sys::RunSignalHandlers()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x5eb90cc)
#2 0x000055f7c928dc91 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007fb92f84def0 (/usr/lib/libc.so.6+0x3def0)
#4 0x00007fb92f8a774c (/usr/lib/libc.so.6+0x9774c)
#5 0x00007fb92f84ddc0 raise (/usr/lib/libc.so.6+0x3ddc0)
#6 0x00007fb92f83557a abort (/usr/lib/libc.so.6+0x2557a)
#7 0x00007fb92f8354e3 __assert_perror_fail (/usr/lib/libc.so.6+0x254e3)
#8 0x000055f7cd69de44 llvm::CodeGenTargetMachineImpl::initAsmInfo()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0xa2cbe44)
#9 0x000055f7ca6f23b6 llvm::X86TargetMachine::X86TargetMachine(llvm::Target
const&, llvm::Triple const&, llvm::StringRef, llvm::StringRef,
llvm::TargetOptions const&, std::optional<llvm::Reloc::Model>,
std::optional<llvm::CodeModel::Model>, llvm::CodeGenOptLevel, bool)
X86TargetMachine.cpp:0:0
#10 0x000055f7ca6f3cc4
llvm::RegisterTargetMachine<llvm::X86TargetMachine>::Allocator(llvm::Target
const&, llvm::Triple const&, llvm::StringRef, llvm::StringRef,
llvm::TargetOptions const&, std::optional<llvm::Reloc::Model>,
std::optional<llvm::CodeModel::Model>, llvm::CodeGenOptLevel, bool)
X86TargetMachine.cpp:0:0
#11 0x000055f7ccca8b0e clang::emitBackendOutput(clang::CompilerInstance&,
clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction,
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x98d6b0e)
#12 0x000055f7ccc9fb53
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x98cdb53)
#13 0x000055f7cc4a36dc
clang::MultiplexConsumer::HandleTranslationUnit(clang::ASTContext&)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x90d16dc)
#14 0x000055f7cb72c879 clang::ParseAST(clang::Sema&, bool, bool)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x835a879)
#15 0x000055f7cc40b2d6 clang::FrontendAction::Execute()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x90392d6)
#16 0x000055f7cc37a6cd
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x8fa86cd)
#17 0x000055f7cc6dceea
clang::tooling::FrontendActionFactory::runInvocation(std::shared_ptr<clang::CompilerInvocation>,
clang::FileManager*, std::shared_ptr<clang::PCHContainerOperations>,
clang::DiagnosticConsumer*)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x930aeea)
#18 0x000055f7cc6dcc2a clang::tooling::ToolInvocation::runInvocation(char
const*, clang::driver::Compilation*,
std::shared_ptr<clang::CompilerInvocation>,
std::shared_ptr<clang::PCHContainerOperations>)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x930ac2a)
#19 0x000055f7cc6db5a5 clang::tooling::ToolInvocation::run()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x93095a5)
#20 0x000055f7cc6dae00
clang::tooling::runToolOnCodeWithArgs(std::unique_ptr<clang::FrontendAction,
std::default_delete<clang::FrontendAction>>, llvm::Twine const&,
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>,
std::vector<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>, std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>>> const&, llvm::Twine const&,
llvm::Twine const&, std::shared_ptr<clang::PCHContainerOperations>)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x9308e00)
#21 0x000055f7cc6da995
clang::tooling::runToolOnCodeWithArgs(std::unique_ptr<clang::FrontendAction,
std::default_delete<clang::FrontendAction>>, llvm::Twine const&,
std::vector<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>, std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>>> const&, llvm::Twine const&,
llvm::Twine const&, std::shared_ptr<clang::PCHContainerOperations>,
std::vector<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>>,
std::allocator<std::pair<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>, std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>>>> const&)
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x9308995)
#22 0x000055f7c90c9f03 (anonymous
namespace)::CodeGenTest_TestNonAlterTest_Test::TestBody()
NoAlterCodeGenActionTest.cpp:0:0
#23 0x000055f7cad83fc0 testing::Test::Run()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x79b1fc0)
#24 0x000055f7cad854d0 testing::TestInfo::Run()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x79b34d0)
#25 0x000055f7cad860ef testing::TestSuite::Run()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x79b40ef)
#26 0x000055f7cad96dd4 testing::internal::UnitTestImpl::RunAllTests()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x79c4dd4)
#27 0x000055f7cad961c9 testing::UnitTest::Run()
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x79c41c9)
#28 0x000055f7cad6eabc main
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x799cabc)
#29 0x00007fb92f8376b5 (/usr/lib/libc.so.6+0x276b5)
#30 0x00007fb92f837769 __libc_start_main (/usr/lib/libc.so.6+0x27769)
#31 0x000055f7c821db65 _start
(.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests+0x4e4bb65)
--
exit: -6
--
shard JSON output does not exist:
.../llvm-project/build/tools/clang/unittests/./AllClangUnitTests-Clang-Unit-4039843-179-182.json
********************
********************
Failed Tests (1):
Clang-Unit :: ./AllClangUnitTests/179/182
Testing Time: 69.21s
Total Discovered Tests: 45688
Skipped : 1 (0.00%)
Unsupported : 1406 (3.08%)
Passed : 44256 (96.87%)
Expectedly Failed: 24 (0.05%)
Failed : 1 (0.00%)
FAILED: tools/clang/test/CMakeFiles/check-clang
.../llvm-project/build/tools/clang/test/CMakeFiles/check-clang
cd .../llvm-project/build/tools/clang/test && /usr/bin/python3.13
.../llvm-project/build/./bin/llvm-lit -sv --param USE_Z3_SOLVER=0
.../llvm-project/build/tools/clang/test
```
https://github.com/llvm/llvm-project/pull/140870
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