| Issue |
179088
|
| Summary |
[Mips] Assertion `I->getNumOperands() == 5 && "Atomics min|max|umin|umax use an additional register"` failed
|
| Labels |
backend:MIPS,
crash-on-valid
|
| Assignees |
|
| Reporter |
alexrp
|
```llvm
; ModuleID = 'reduced.bc'
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "mips64el-unknown-linux5.10.0-muslabi64"
define i32 @__atomic_fetch_umax_4(i32 signext %0) {
Entry:
%1 = atomicrmw umax ptr null, i32 %0 monotonic, align 4
ret i32 %1
}
```
```console
❯ llc --version | head -n2
LLVM (http://llvm.org/):
LLVM version 22.1.0-rc2
❯ llc -O1 reduced.ll
llc: /home/alexrp/Sources/llvm/llvm/lib/Target/Mips/MipsExpandPseudo.cpp:886: bool {anonymous}::MipsExpandPseudo::expandAtomicBinOp(llvm::MachineBasicBlock&, llvm::MachineBasicBlock::iterator, llvm::MachineBasicBlock::iterator&, unsigned int): Assertion `I->getNumOperands() == 5 && "Atomics min|max|umin|umax use an additional register"' failed.
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 -O1 reduced.ll
1. Running pass 'Function Pass Manager' on module 'reduced.ll'.
2. Running pass 'Mips pseudo instruction expansion pass' on function '@__atomic_fetch_umax_4'
#0 0x0000790b32c2216d llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/alexrp/Sources/llvm/llvm/lib/Support/Unix/Signals.inc:846:3
#1 0x0000790b32c1f2a4 llvm::sys::RunSignalHandlers() /home/alexrp/Sources/llvm/llvm/lib/Support/Signals.cpp:108:20
#2 0x0000790b32c1fabc SignalHandler(int, siginfo_t*, void*) /home/alexrp/Sources/llvm/llvm/lib/Support/Unix/Signals.inc:429:14
#3 0x0000790b31445f60 (/lib/x86_64-linux-gnu/libc.so.6+0x45f60)
#4 0x0000790b314a5fed __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#5 0x0000790b314a5fed __pthread_kill_internal ./nptl/pthread_kill.c:89:10
#6 0x0000790b314a5fed pthread_kill ./nptl/pthread_kill.c:100:10
#7 0x0000790b31445e2e raise ./signal/../sysdeps/posix/raise.c:27:6
#8 0x0000790b31428888 internal_signal_block_all ./stdlib/../sysdeps/unix/sysv/linux/internal-signals.h:81:3
#9 0x0000790b31428888 __abort_lock_wrlock ./stdlib/abort.c:62:3
#10 0x0000790b31428888 abort ./stdlib/abort.c:85:3
#12 0x0000790b327f4fe8 llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>::MachineInstrBundleIterator(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::MachineInstr, true, true, void, false, void>, false, false>) /home/alexrp/Sources/llvm/llvm/include/llvm/CodeGen/MachineInstrBundleIterator.h:133:5
#13 0x0000790b327f4fe8 llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>::MachineInstrBundleIterator(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::MachineInstr, true, true, void, false, void>, false, false>) /home/alexrp/Sources/llvm/llvm/include/llvm/CodeGen/MachineInstrBundleIterator.h:132:3
#14 0x0000790b327f4fe8 llvm::MachineBasicBlock::end() /home/alexrp/Sources/llvm/llvm/include/llvm/CodeGen/MachineBasicBlock.h:387:59
#15 0x0000790b327f4fe8 (anonymous namespace)::MipsExpandPseudo::expandAtomicBinOp(llvm::MachineBasicBlock&, llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>, llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>&, unsigned int) (.isra.0.cold) /home/alexrp/Sources/llvm/llvm/lib/Target/Mips/MipsExpandPseudo.cpp:863:18
#16 0x0000790b36a32f11 expandMI /home/alexrp/Sources/llvm/llvm/lib/Target/Mips/MipsExpandPseudo.cpp:1075:29
#17 0x0000790b36a32f11 expandMBB /home/alexrp/Sources/llvm/llvm/lib/Target/Mips/MipsExpandPseudo.cpp:1087:25
#18 0x0000790b36a32f11 (anonymous namespace)::MipsExpandPseudo::runOnMachineFunction(llvm::MachineFunction&) /home/alexrp/Sources/llvm/llvm/lib/Target/Mips/MipsExpandPseudo.cpp:1100:26
#19 0x0000790b331aafea llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) /home/alexrp/Sources/llvm/llvm/lib/CodeGen/MachineFunctionPass.cpp:108:30
#20 0x0000790b32dddaaa llvm::FPPassManager::runOnFunction(llvm::Function&) /home/alexrp/Sources/llvm/llvm/lib/IR/LegacyPassManager.cpp:1398:40
#21 0x0000790b32dddcb5 llvm::ilist_detail::node_base_prevnext<llvm::ilist_node_base<true, void>, true>::getNext() const /home/alexrp/Sources/llvm/llvm/include/llvm/ADT/ilist_node_base.h:42:38
#22 0x0000790b32dddcb5 llvm::ilist_node_impl<llvm::ilist_detail::node_options<llvm::Function, true, false, void, false, void>>::getNext() /home/alexrp/Sources/llvm/llvm/include/llvm/ADT/ilist_node.h:108:66
#23 0x0000790b32dddcb5 llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Function, true, false, void, false, void>, false, false>::operator++() /home/alexrp/Sources/llvm/llvm/include/llvm/ADT/ilist_iterator.h:187:25
#24 0x0000790b32dddcb5 llvm::FPPassManager::runOnModule(llvm::Module&) /home/alexrp/Sources/llvm/llvm/lib/IR/LegacyPassManager.cpp:1443:22
#25 0x0000790b32dde54f runOnModule /home/alexrp/Sources/llvm/llvm/lib/IR/LegacyPassManager.cpp:1513:38
#26 0x0000790b32dde54f llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/alexrp/Sources/llvm/llvm/lib/IR/LegacyPassManager.cpp:531:55
#27 0x00006185c6e2e9f5 compileModule(char**, llvm::SmallVectorImpl<llvm::PassPlugin>&, llvm::LLVMContext&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>&) /home/alexrp/Sources/llvm/llvm/tools/llc/llc.cpp:874:34
#28 0x00006185c6e21f5c main /home/alexrp/Sources/llvm/llvm/tools/llc/llc.cpp:462:35
#29 0x0000790b3142a575 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#30 0x0000790b3142a628 call_init ./csu/../csu/libc-start.c:128:20
#31 0x0000790b3142a628 __libc_start_main ./csu/../csu/libc-start.c:347:5
#32 0x00006185c6e22ce5 _start (/opt/llvm-22/bin/llc+0x15ce5)
fish: Job 1, 'llc -O1 reduced.ll' terminated by signal SIGABRT (Abort)
```
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