[AVR] Failed to select instruction for 'i8 @llvm.fshr.i8(i8, i8, i8)'

[benshi001]

With the following code a.ll

define i8 @test(i8 %0) {
start:
  %1 = call i8 @llvm.fshr.i8(i8 %0, i8 %0, i8 1)
  ret i8 %1
}

declare i8 @llvm.fshr.i8(i8, i8, i8)

Build it with llc a.ll -march=avr -mcpu=atmega328, the following error rises

LLVM ERROR: Cannot select: 0x3e38b00: i8 = ROL 0x3e387f0
  0x3e387f0: i8,ch = CopyFromReg 0x3df6db0, Register:i8 %0
    0x3e38780: i8 = Register %0
In function: test
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: ./bin/llc a.ll -march=avr -mcpu=atmega328
1.	Running pass 'Function Pass Manager' on module 'a.ll'.
2.	Running pass 'AVR DAG->DAG Instruction Selection' on function '@test'
 #0 0x0000000001a0dc08 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (./bin/llc+0x1a0dc08)
 #1 0x0000000001a0b63c SignalHandler(int) Signals.cpp:0:0
 #2 0x00007f435a0f0cf0 __restore_rt (/lib64/libpthread.so.0+0x12cf0)
 #3 0x00007f4358e13aff raise (/lib64/libc.so.6+0x4eaff)
 #4 0x00007f4358de6ea5 abort (/lib64/libc.so.6+0x21ea5)
 #5 0x000000000066ae2f llvm::getDefaultPrecision(llvm::FloatStyle) (.cold.18) NativeFormatting.cpp:0:0
 #6 0x000000000182d114 llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (./bin/llc+0x182d114)
 #7 0x00000000018311ba llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (./bin/llc+0x18311ba)
 #8 0x0000000000a2dc53 (anonymous namespace)::AVRDAGToDAGISel::Select(llvm::SDNode*) AVRISelDAGToDAG.cpp:0:0
 #9 0x000000000182b6cc llvm::SelectionDAGISel::DoInstructionSelection() (./bin/llc+0x182b6cc)
#10 0x000000000183588e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (./bin/llc+0x183588e)
#11 0x000000000183852e llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (./bin/llc+0x183852e)
#12 0x000000000183a3ec llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.1076) SelectionDAGISel.cpp:0:0
#13 0x0000000000eab07e llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.78) MachineFunctionPass.cpp:0:0
#14 0x000000000134ebd9 llvm::FPPassManager::runOnFunction(llvm::Function&) (./bin/llc+0x134ebd9)
#15 0x000000000134ed21 llvm::FPPassManager::runOnModule(llvm::Module&) (./bin/llc+0x134ed21)
#16 0x000000000134f8bf llvm::legacy::PassManagerImpl::run(llvm::Module&) (./bin/llc+0x134f8bf)
#17 0x00000000006cd0c5 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#18 0x000000000067295a main (./bin/llc+0x67295a)
#19 0x00007f4358dffd85 __libc_start_main (/lib64/libc.so.6+0x3ad85)
#20 0x00000000006c4b6e _start (./bin/llc+0x6c4b6e)
Aborted (core dumped)

[benshi001]

relates to rust-lang/rust#107261

[benshi001]

fixed by ff75a2b