| Issue |
155806
|
| Summary |
[AArch64] crash on vector register assignment using "=w" constraint
|
| Labels |
backend:AArch64,
crash
|
| Assignees |
|
| Reporter |
k-arrows
|
Reproducer:
https://godbolt.org/z/6KsbTvvrf
```cpp
typedef float vnx4sf __attribute__((vector_size(32)));
void foo ()
{
register vnx4sf x asm ("z0");
asm volatile ("" : "=w" (x));
}
```
Backtrace:
```console
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-trunk/bin/clang++ -g -o /app/output.s -fno-verbose-asm -S -target aarch64-linux-gnu --gcc-toolchain=/opt/compiler-explorer/arm64/gcc-12.2.0/aarch64-unknown-linux-gnu --sysroot=/opt/compiler-explorer/arm64/gcc-12.2.0/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/sysroot -fcolor-diagnostics -fno-crash-diagnostics <source>
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module '<source>'.
4. Running pass 'AArch64 Instruction Selection' on function '@_Z3foov'
#0 0x0000000003d0ae68 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3d0ae68)
#1 0x0000000003d0883c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3d0883c)
#2 0x0000000003c57ab8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007943d1e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00000000033ab9c4 llvm::EVT::isExtendedVector() const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x33ab9c4)
#5 0x00000000051b04e1 llvm::TargetLoweringBase::getNumRegisters(llvm::LLVMContext&, llvm::EVT, std::optional<llvm::MVT>) const (.constprop.0) SelectionDAGBuilder.cpp:0:0
#6 0x00000000051bc74a getRegistersForValue(llvm::SelectionDAG&, llvm::SDLoc const&, (anonymous namespace)::SDISelAsmOperandInfo&, (anonymous namespace)::SDISelAsmOperandInfo&) SelectionDAGBuilder.cpp:0:0
#7 0x00000000051d6867 llvm::SelectionDAGBuilder::visitInlineAsm(llvm::CallBase const&, llvm::BasicBlock const*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x51d6867)
#8 0x00000000051f9dc7 llvm::SelectionDAGBuilder::visitCall(llvm::CallInst const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x51f9dc7)
#9 0x000000000520eb8c llvm::SelectionDAGBuilder::visit(llvm::Instruction const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x520eb8c)
#10 0x0000000005290204 llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void, true, llvm::BasicBlock>, false, true>, llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void, true, llvm::BasicBlock>, false, true>, bool&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x5290204)
#11 0x0000000005291525 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x5291525)
#12 0x00000000052933b6 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x52933b6)
#13 0x0000000005280951 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x5280951)
#14 0x00000000030d181d llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x30d181d)
#15 0x000000000364af72 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x364af72)
#16 0x000000000364b0f1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x364b0f1)
#17 0x000000000364c287 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x364c287)
#18 0x0000000003fb0d8d 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-trunk/bin/clang+++0x3fb0d8d)
#19 0x00000000045f3b9c clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45f3b9c)
#20 0x00000000062813cc clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x62813cc)
#21 0x00000000045f438d clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45f438d)
#22 0x0000000004901d9a clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4901d9a)
#23 0x000000000487ba2b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x487ba2b)
#24 0x00000000049f5153 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x49f5153)
#25 0x0000000000dbbb15 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdbbb15)
#26 0x0000000000db3abd ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#27 0x0000000004667239 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
#28 0x0000000003c57ed3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3c57ed3)
#29 0x0000000004667459 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
#30 0x000000000462a02d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x462a02d)
#31 0x000000000462afe1 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x462afe1)
#32 0x0000000004634a9c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4634a9c)
#33 0x0000000000db8321 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb8321)
#34 0x0000000000c6c7c4 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc6c7c4)
#35 0x00007943d1e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#36 0x00007943d1e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#37 0x0000000000db3555 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb3555)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Compiler returned: 139
```
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