Description
When compiling the following piece of code, NVPTX backend crashes.
The bug can be reproduced from LLVM14 or latest commit e723c69b94
You can find the reproduction here: https://llvm.godbolt.org/z/EWs3f5bsG
define void @f(<32 x i1>* %A) {
BB:
br label %BB1
BB1: ; preds = %BB1, %BB
%L = load <32 x i1>, <32 x i1>* %A, align 4
%E1 = extractelement <32 x i1> %L, i1 false
%E = extractelement <32 x i1> %L, i8 16
%C = icmp sge i1 %E1, %E
br i1 %C, label %BB1, label %BB2
BB2: ; preds = %BB1
%I = insertelement <32 x i1> zeroinitializer, i1 %E, i64 0
store <32 x i1> %I, <32 x i1>* %A, align 4
ret void
}LLVM ERROR: Cannot select: t14: i1 = setcc t304, t144, setge:ch
t304: i1 = truncate t302
t302: i16,ch = load<(load (s8) from %ir.A, align 4), anyext from i8> t0, t2, undef:i32
t2: i32,ch = CopyFromReg t0, Register:i32 %1
t1: i32 = Register %1
t4: i32 = undef
t144: i1 = truncate t142
t142: i16,ch = load<(load (s8) from %ir.A + 2, align 2, basealign 4), anyext from i8> t0, t21, undef:i32
t21: i32 = add nuw t2, Constant:i32<2>
t2: i32,ch = CopyFromReg t0, Register:i32 %1
t1: i32 = Register %1
t20: i32 = Constant<2>
t4: i32 = undef
In function: f
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: /home/peter/aflplusplus-isel/llvm-project/build-debug/bin/llc -mtriple=nvptx setcc.ll
1. Running pass 'Function Pass Manager' on module 'setcc.ll'.
2. Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@f'
#0 0x0000000003a45a1a llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Support/Unix/Signals.inc:569:11
#1 0x0000000003a45bcb PrintStackTraceSignalHandler(void*) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Support/Unix/Signals.inc:636:1
#2 0x0000000003a44216 llvm::sys::RunSignalHandlers() /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Support/Signals.cpp:103:5
#3 0x0000000003a462f5 SignalHandler(int) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Support/Unix/Signals.inc:407:1
#4 0x00007fd7f16e2980 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
#5 0x00007fd7f05d2e87 raise /build/glibc-uZu3wS/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#6 0x00007fd7f05d47f1 abort /build/glibc-uZu3wS/glibc-2.27/stdlib/abort.c:81:0
#7 0x000000000396ca74 llvm::report_fatal_error(llvm::Twine const&, bool) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Support/ErrorHandling.cpp:125:5
#8 0x00000000037bec8b /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:3765:3
#9 0x00000000037bc222 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:3667:9
#10 0x0000000001e0e299 llvm::NVPTXDAGToDAGISel::SelectCode(llvm::SDNode*) /home/peter/aflplusplus-isel/llvm-project/build-debug/lib/Target/NVPTX/NVPTXGenDAGISel.inc:86754:1
#11 0x0000000001e00944 llvm::NVPTXDAGToDAGISel::Select(llvm::SDNode*) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp:505:1
#12 0x00000000037afdb9 llvm::SelectionDAGISel::DoInstructionSelection() /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1153:5
#13 0x00000000037aee0a llvm::SelectionDAGISel::CodeGenAndEmitDAG() /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:933:3
#14 0x00000000037ad7dd llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void>, false, true>, llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void>, false, true>, bool&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:685:1
#15 0x00000000037ad27b llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1591:11
#16 0x00000000037aa81d llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:464:3
#17 0x0000000001e004e5 llvm::NVPTXDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp:46:3
#18 0x000000000281fadd llvm::MachineFunctionPass::runOnFunction(llvm::Function&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/CodeGen/MachineFunctionPass.cpp:85:8
#19 0x0000000002ef9146 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1430:23
#20 0x0000000002efdf72 llvm::FPPassManager::runOnModule(llvm::Module&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1476:16
#21 0x0000000002ef9a19 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1545:23
#22 0x0000000002ef958d llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:535:16
#23 0x0000000002efe251 llvm::legacy::PassManager::run(llvm::Module&) /home/peter/aflplusplus-isel/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1672:3
#24 0x0000000000d1ad70 compileModule(char**, llvm::LLVMContext&) /home/peter/aflplusplus-isel/llvm-project/llvm/tools/llc/llc.cpp:737:41
#25 0x0000000000d190f2 main /home/peter/aflplusplus-isel/llvm-project/llvm/tools/llc/llc.cpp:418:13
#26 0x00007fd7f05b5c87 __libc_start_main /build/glibc-uZu3wS/glibc-2.27/csu/../csu/libc-start.c:344:0
#27 0x0000000000d188fa _start (/home/peter/aflplusplus-isel/llvm-project/build-debug/bin/llc+0xd188fa)
Aborted