| Issue |
172298
|
| Summary |
[X86][GISel] Crash with GlobalISel enabled when compiling simple loop with _Complex float (-O2)
|
| Labels |
backend:X86,
llvm:globalisel,
crash
|
| Assignees |
|
| Reporter |
k-arrows
|
Reproducer:
https://godbolt.org/z/fqrdGfx3W
```cpp
void foo(_Complex float *a, _Complex float *b) {
for (int i = 0; i != 10; i++)
a[i] = b[i];
}
```
Backtrace:
```console
Unsupported register size.
UNREACHABLE executed at /root/llvm-project/llvm/lib/Target/X86/GISel/X86RegisterBankInfo.cpp:190!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -O2 -mllvm -global-isel -mllvm -global-isel-abort=2 <source>
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module '<source>'.
4. Running pass 'RegBankSelect' on function '@_Z3fooPCfS0_'
#0 0x00000000042bbe08 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42bbe08)
#1 0x00000000042b9234 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42b9234)
#2 0x00000000041fe018 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007bd2d4e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007bd2d4e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007bd2d4e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007bd2d4e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000000004208c4a (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4208c4a)
#8 0x0000000002df8689 llvm::X86GenRegisterBankInfo::getPartialMappingIdx(llvm::MachineInstr const&, llvm::LLT const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x2df8689)
#9 0x0000000002df8842 llvm::X86RegisterBankInfo::getInstrPartialMappingIdxs(llvm::MachineInstr const&, llvm::MachineRegisterInfo const&, bool, llvm::SmallVectorImpl<llvm::X86GenRegisterBankInfo::PartialMappingIdx>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x2df8842)
#10 0x0000000002df9dcd llvm::X86RegisterBankInfo::getInstrMapping(llvm::MachineInstr const&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x2df9dcd)
#11 0x00000000056cc0c7 llvm::RegBankSelect::assignInstr(llvm::MachineInstr&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x56cc0c7)
#12 0x00000000056cc665 llvm::RegBankSelect::assignRegisterBanks(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x56cc665)
#13 0x00000000056cc896 llvm::RegBankSelect::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x56cc896)
#14 0x0000000003556fe9 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#15 0x0000000003bad376 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bad376)
#16 0x0000000003bad721 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bad721)
#17 0x0000000003badf8f llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3badf8f)
#18 0x000000000457ff7d 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*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x457ff7d)
#19 0x0000000004c0de87 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c0de87)
#20 0x00000000069be52c clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69be52c)
#21 0x0000000004c0e2e8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c0e2e8)
#22 0x0000000004f03985 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4f03985)
#23 0x0000000004e83bfe clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4e83bfe)
#24 0x0000000004ffda3d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ffda3d)
#25 0x0000000000dcf4cc cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdcf4cc)
#26 0x0000000000dc5f2a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#27 0x0000000000dc60ad int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#28 0x0000000004c80f19 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#29 0x00000000041fe4b4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41fe4b4)
#30 0x0000000004c8152f clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#31 0x0000000004c41d22 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c41d22)
#32 0x0000000004c42cce clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c42cce)
#33 0x0000000004c4a105 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c4a105)
#34 0x0000000000dcb8d1 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdcb8d1)
#35 0x0000000000c77584 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc77584)
#36 0x00007bd2d4e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#37 0x00007bd2d4e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#38 0x0000000000dc59c5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdc59c5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
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