[x86]: Cannot select: constant:i128<0> for llvm.maximum.f128 #139381
Description
I'm seeing an error when trying to use llvm.minimum.f128 and llvm.maximum.f128 on x86.
; Function Attrs: mustprogress nofree nosync nounwind nonlazybind readnone uwtable willreturn define fp128 @call_maximum_fp128_x86(fp128 %x, fp128 %y) unnamed_addr #0 { start: %0 = tail call fp128 @llvm.maximum.f128(fp128 %x, fp128 %y) #2 ret fp128 %0 } ; Function Attrs: mustprogress nofree nosync nounwind readnone speculatable willreturn declare fp128 @llvm.maximum.f128(fp128, fp128)LLVM ERROR: Cannot select: 0x3ade0080: i8 = setcc 0x3addc768, Constant:i128<0>, seteq:ch 0x3addc768: i128 = bitcast 0x3addbe08 0x3addbe08: f128,ch = CopyFromReg 0x3ad783c0, Register:f128 %1 0x3addbd90: f128 = Register %1 0x3addfdb0: i128 = Constant<0> In function: call_maximum_fp128_x86 PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. Stack dump: 0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/llc -o /app/output.s -x86-asm-syntax=intel <source> 1. Running pass 'Function Pass Manager' on module '<source>'. 2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@call_maximum_fp128_x86' #0 0x0000000003b49548 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3b49548) #1 0x0000000003b47104 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0 #2 0x00007e645a842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520) #3 0x00007e645a8969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc) #4 0x00007e645a842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476) #5 0x00007e645a8287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3) #6 0x0000000000784592 llvm::UniqueStringSaver::save(llvm::Twine const&) (.cold) StringSaver.cpp:0:0 #7 0x00000000038f0888 llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/opt/compiler-explorer/clang-trunk/bin/llc+0x38f0888) #8 0x00000000038f6bf9 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x38f6bf9) #9 0x0000000001f70c6a (anonymous namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) X86ISelDAGToDAG.cpp:0:0 #10 0x00000000038edd74 llvm::SelectionDAGISel::DoInstructionSelection() (/opt/compiler-explorer/clang-trunk/bin/llc+0x38edd74) #11 0x00000000038fc882 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-trunk/bin/llc+0x38fc882) #12 0x00000000038ff1fa llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x38ff1fa) #13 0x00000000039010d6 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x39010d6) #14 0x00000000038ed8f1 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x38ed8f1) #15 0x0000000002bb4a78 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0 #16 0x0000000003135322 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3135322) #17 0x00000000031355b1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x31355b1) #18 0x0000000003136f19 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3136f19) #19 0x00000000008bec3f compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0 #20 0x000000000079977e main (/opt/compiler-explorer/clang-trunk/bin/llc+0x79977e) #21 0x00007e645a829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90) #22 0x00007e645a829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40) #23 0x00000000008b6705 _start (/opt/compiler-explorer/clang-trunk/bin/llc+0x8b6705) Program terminated with signal: SIGSEGV Compiler returned: 139