[llvm] CodeGen: Add ISD::AssertNoFPClass (PR #135946)

[Mikael Holmén via llvm-commits]

mikaelholmen wrote:

Hello @wzssyqa ,

With this patch
```clang -c -ffast-math bbi-106508.c```
starts crashing like
```
clang: ../lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp:5595: SDValue llvm::DAGTypeLegalizer::WidenVecRes_Unary(SDNode *): Assertion `N->getNumOperands() == 3 && "Unexpected number of operands!"' failed.
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: build-all/bin/clang -c -ffast-math bbi-106508.c
1.	<eof> parser at end of file
2.	Code generation
3.	Running pass 'Function Pass Manager' on module 'bbi-106508.c'.
4.	Running pass 'X86 DAG->DAG Instruction Selection' on function '@f'
 #0 0x00005653df4ff2d6 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (build-all/bin/clang+0x861e2d6)
 #1 0x00005653df4fcdbe llvm::sys::RunSignalHandlers() (build-all/bin/clang+0x861bdbe)
 #2 0x00005653df4fe614 llvm::sys::CleanupOnSignal(unsigned long) (build-all/bin/clang+0x861d614)
 #3 0x00005653df45fa9d CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #4 0x00007f1b31a62d10 __restore_rt (/lib64/libpthread.so.0+0x12d10)
 #5 0x00007f1b2f40252f raise (/lib64/libc.so.6+0x4e52f)
 #6 0x00007f1b2f3d5e65 abort (/lib64/libc.so.6+0x21e65)
 #7 0x00007f1b2f3d5d39 _nl_load_domain.cold.0 (/lib64/libc.so.6+0x21d39)
 #8 0x00007f1b2f3fae86 (/lib64/libc.so.6+0x46e86)
 #9 0x00005653e0a7f0a8 llvm::DAGTypeLegalizer::WidenVecRes_Unary(llvm::SDNode*) LegalizeVectorTypes.cpp:0:0
#10 0x00005653e0a70f55 llvm::DAGTypeLegalizer::WidenVectorResult(llvm::SDNode*, unsigned int) LegalizeVectorTypes.cpp:0:0
#11 0x00005653e0a0d0ab llvm::DAGTypeLegalizer::run() LegalizeTypes.cpp:0:0
#12 0x00005653e0a12b19 llvm::SelectionDAG::LegalizeTypes() (build-all/bin/clang+0x9b31b19)
#13 0x00005653e09ceb48 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (build-all/bin/clang+0x9aedb48)
#14 0x00005653e09cbec4 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (build-all/bin/clang+0x9aeaec4)
#15 0x00005653e09ca811 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (build-all/bin/clang+0x9ae9811)
#16 0x00005653e09c8009 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (build-all/bin/clang+0x9ae7009)
#17 0x00005653de924547 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (build-all/bin/clang+0x7a43547)
#18 0x00005653deea4c39 llvm::FPPassManager::runOnFunction(llvm::Function&) (build-all/bin/clang+0x7fc3c39)
#19 0x00005653deead232 llvm::FPPassManager::runOnModule(llvm::Module&) (build-all/bin/clang+0x7fcc232)
#20 0x00005653deea5718 llvm::legacy::PassManagerImpl::run(llvm::Module&) (build-all/bin/clang+0x7fc4718)
#21 0x00005653dfcc3ff9 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*) (build-all/bin/clang+0x8de2ff9)
#22 0x00005653dfcdacb7 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (build-all/bin/clang+0x8df9cb7)
#23 0x00005653e18170f9 clang::ParseAST(clang::Sema&, bool, bool) (build-all/bin/clang+0xa9360f9)
#24 0x00005653e0323cf4 clang::FrontendAction::Execute() (build-all/bin/clang+0x9442cf4)
#25 0x00005653e028b38d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (build-all/bin/clang+0x93aa38d)
#26 0x00005653e0429095 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (build-all/bin/clang+0x9548095)
#27 0x00005653dc99aa27 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (build-all/bin/clang+0x5ab9a27)
#28 0x00005653dc996f2d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#29 0x00005653e00be379 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::$_0>(long) Job.cpp:0:0
#30 0x00005653df45f796 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (build-all/bin/clang+0x857e796)
#31 0x00005653e00bd883 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (build-all/bin/clang+0x91dc883)
#32 0x00005653e0075b17 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (build-all/bin/clang+0x9194b17)
#33 0x00005653e0075e37 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (build-all/bin/clang+0x9194e37)
#34 0x00005653e00966f9 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (build-all/bin/clang+0x91b56f9)
#35 0x00005653dc996566 clang_main(int, char**, llvm::ToolContext const&) (build-all/bin/clang+0x5ab5566)
#36 0x00005653dc9a71c6 main (build-all/bin/clang+0x5ac61c6)
#37 0x00007f1b2f3ee7e5 __libc_start_main (/lib64/libc.so.6+0x3a7e5)
#38 0x00005653dc9947ee _start (build-all/bin/clang+0x5ab37ee)
```
[bbi-106508.c.gz](https://github.com/user-attachments/files/19937003/bbi-106508.c.gz)


https://github.com/llvm/llvm-project/pull/135946