| Issue |
181265
|
| Summary |
LLVM ERROR: Do not know how to soften this operator's operand!
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
abhilashnv
|
Link to CE: https://godbolt.org/z/EEzEaPYa3
The bug is a regression from 10.0.1
Summary: llc crashes with LLVM ERROR: Do not know how to soften this operator's operand! in DAGTypeLegalizer::SoftenFloatOperand when compiling the llvm.llrint.i64.f64 intrinsic for i386 with both SSE2 and x87 disabled (-mattr=-sse2,-x87). The X86 backend incorrectly attempts to use X86ISD::FIST (an x87 instruction) even when x87 is unavailable, instead of falling back to a libcall.
Reproducer:
define i64 @test_llrint_f64_expand() {
entry:
%result = call i64 @llvm.llrint.i64.f64(double 0.000000e+00)
ret i64 %result
}
declare i64 @llvm.llrint.i64.f64(double)
Error:
>$ llc -mtriple=i386-unknown-linux-gnu -mattr=-sse2,-x87 reduced.ll
SoftenFloatOperand Op #1: t15: ch = X86ISD::FIST<(store (s64) into %stack.0, align 4)> t0, ConstantFP:f64<0.000000e+00>, FrameIndex:i32<0>
LLVM ERROR: Do not know how to soften this operator's operand!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0. Program arguments: llc -mtriple=i386-unknown-linux-gnu -mattr=-sse2,-x87 reduced.ll
1. Running pass 'Function Pass Manager' on module 'reduced.ll'.
2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@test_llrint_f64_expand'
#0 0x00007062e8ec9481 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /workspace/oss-llvm/llvm_src/llvm/lib/Support/Unix/Signals.inc:842:11
#1 0x00007062e8ec99fb PrintStackTraceSignalHandler(void*) /workspace/oss-llvm/llvm_src/llvm/lib/Support/Unix/Signals.inc:924:1
#2 0x00007062e8ec770b llvm::sys::RunSignalHandlers() /workspace/oss-llvm/llvm_src/llvm/lib/Support/Signals.cpp:108:5
#3 0x00007062e8eca17d SignalHandler(int, siginfo_t*, void*) /workspace/oss-llvm/llvm_src/llvm/lib/Support/Unix/Signals.inc:429:38
#4 0x00007062e85b5330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#5 0x00007062e860eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#6 0x00007062e860eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#7 0x00007062e860eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#8 0x00007062e85b527e raise ./signal/../sysdeps/posix/raise.c:27:6
#9 0x00007062e85988ff abort ./stdlib/abort.c:81:7
#10 0x00007062e8d54f9d llvm::report_fatal_error(llvm::Twine const&, bool) /workspace/oss-llvm/llvm_src/llvm/lib/Support/ErrorHandling.cpp:137:5
#11 0x00007062e8d54e12 /workspace/oss-llvm/llvm_src/llvm/lib/Support/ErrorHandling.cpp:96:3
#12 0x00007062eeac1f06 llvm::DAGTypeLegalizer::SoftenFloatOperand(llvm::SDNode*, unsigned int) /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp:0:5
#13 0x00007062eeb237d3 llvm::DAGTypeLegalizer::run() /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp:331:26
#14 0x00007062eeb27e4b llvm::SelectionDAG::LegalizeTypes() /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp:1046:34
#15 0x00007062eed4ed64 llvm::SelectionDAGISel::CodeGenAndEmitDAG() /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1023:13
#16 0x00007062eed4e653 llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>, false, true>, llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>, false, true>, bool&) /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:921:1
#17 0x00007062eed4e228 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1962:11
#18 0x00007062eed4b07c llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:658:3
#19 0x00007062f0e5bb02 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) /workspace/oss-llvm/llvm_src/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:187:7
#20 0x00007062eed49c71 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:400:3
#21 0x00007062ed2a639b llvm::MachineFunctionPass::runOnFunction(llvm::Function&) /workspace/oss-llvm/llvm_src/llvm/lib/CodeGen/MachineFunctionPass.cpp:112:8
#22 0x00007062e992f51a llvm::FPPassManager::runOnFunction(llvm::Function&) /workspace/oss-llvm/llvm_src/llvm/lib/IR/LegacyPassManager.cpp:1398:23
#23 0x00007062e9933f02 llvm::FPPassManager::runOnModule(llvm::Module&) /workspace/oss-llvm/llvm_src/llvm/lib/IR/LegacyPassManager.cpp:1444:16
#24 0x00007062e992fdcb (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /workspace/oss-llvm/llvm_src/llvm/lib/IR/LegacyPassManager.cpp:1513:23
#25 0x00007062e992f94a llvm::legacy::PassManagerImpl::run(llvm::Module&) /workspace/oss-llvm/llvm_src/llvm/lib/IR/LegacyPassManager.cpp:531:16
#26 0x00007062e99341e1 llvm::legacy::PassManager::run(llvm::Module&) /workspace/oss-llvm/llvm_src/llvm/lib/IR/LegacyPassManager.cpp:1640:3
#27 0x000063a73ad115b3 compileModule(char**, llvm::SmallVectorImpl<llvm::PassPlugin>&, llvm::LLVMContext&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>&) /workspace/oss-llvm/llvm_src/llvm/tools/llc/llc.cpp:870:9
#28 0x000063a73ad0f225 main /workspace/oss-llvm/llvm_src/llvm/tools/llc/llc.cpp:458:13
#29 0x00007062e859a1ca __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#30 0x00007062e859a28b call_init ./csu/../csu/libc-start.c:128:20
#31 0x00007062e859a28b __libc_start_main ./csu/../csu/libc-start.c:347:5
#32 0x000063a73ad0e995 _start (/workspace/oss-llvm/bin/bin/llc+0x4f995)
Aborted (core dumped)
LLVM commit: 6716acd588462c6b33afa1633c4a5ddbcec59360
CC: @alidavanian @Vsevolod-Livinskij as collaborators.
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