[x86] Cannot select X86ISD::VZEXT_MOVL when targeting Intel Sapphire Rapids

[HazyFish]

Description

The following code crashes x86 backend with "Cannot select X86ISD::VZEXT_MOVL" when targeting sapphirerapids CPU.

The code can successfully compile without specifying CPU.

Minimal Reproduction

https://godbolt.org/z/asEvGcG7e

Code

define <8 x i16> @f(i16 %0) {
BB:
  %I1 = insertelement <8 x i16> zeroinitializer, i16 %0, i16 0
  %I2 = insertelement <8 x i16> %I1, i16 0, i16 %0
  ret <8 x i16> %I2
}

Stack Trace

LLVM ERROR: Cannot select: t37: v8i16 = X86ISD::VZEXT_MOVL t48
  t48: v8i16 = X86ISD::VBROADCAST t3
    t3: i16 = truncate t2
      t2: i32,ch = CopyFromReg t0, Register:i32 %0
        t1: i32 = Register %0
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: ./llvm-project-latest/build-debug/bin/llc -mtriple=x86_64 -mcpu=sapphirerapids ./crash-reports/dagisel-x86_64/sapphirerapids/1.ll
1.	Running pass 'Function Pass Manager' on module './crash-reports/dagisel-x86_64/sapphirerapids/1.ll'.
2.	Running pass 'X86 DAG->DAG Instruction Selection' on function '@f'
 #0 0x00007f94f47e0f2a llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Support/Unix/Signals.inc:567:11
 #1 0x00007f94f47e10db PrintStackTraceSignalHandler(void*) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Support/Unix/Signals.inc:641:1
 #2 0x00007f94f47df756 llvm::sys::RunSignalHandlers() /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Support/Signals.cpp:104:5
 #3 0x00007f94f47e1805 SignalHandler(int) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Support/Unix/Signals.inc:412:1
 #4 0x00007f94f2f75980 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
 #5 0x00007f94f2271e87 raise /build/glibc-CVJwZb/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
 #6 0x00007f94f22737f1 abort /build/glibc-CVJwZb/glibc-2.27/stdlib/abort.c:81:0
 #7 0x00007f94f4654424 llvm::report_fatal_error(llvm::Twine const&, bool) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Support/ErrorHandling.cpp:125:5
 #8 0x00007f94f4ff0e5b /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:3817:3
 #9 0x00007f94f4fee3f2 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:3719:9
#10 0x00007f9501023b49 (anonymous namespace)::X86DAGToDAGISel::SelectCode(llvm::SDNode*) /home/henry/aflplusplus-isel/llvm-project-latest/build-debug/lib/Target/X86/X86GenDAGISel.inc:333210:1
#11 0x00007f9501019e47 (anonymous namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:6171:1
#12 0x00007f94f4fe2199 llvm::SelectionDAGISel::DoInstructionSelection() /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1178:5
#13 0x00007f94f4fe11ea llvm::SelectionDAGISel::CodeGenAndEmitDAG() /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:949:3
#14 0x00007f94f4fdfbbd 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/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:701:1
#15 0x00007f94f4fdf64d llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1641:11
#16 0x00007f94f4fdcb27 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:480:3
#17 0x00007f9501007b7a (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:193:7
#18 0x00007f94f7ff51d5 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/CodeGen/MachineFunctionPass.cpp:91:8
#19 0x00007f94f713d676 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/IR/LegacyPassManager.cpp:1430:23
#20 0x00007f94f71424a2 llvm::FPPassManager::runOnModule(llvm::Module&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/IR/LegacyPassManager.cpp:1476:16
#21 0x00007f94f713df49 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/IR/LegacyPassManager.cpp:1545:23
#22 0x00007f94f713dabd llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/IR/LegacyPassManager.cpp:535:16
#23 0x00007f94f7142781 llvm::legacy::PassManager::run(llvm::Module&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/lib/IR/LegacyPassManager.cpp:1672:3
#24 0x0000000000419b16 compileModule(char**, llvm::LLVMContext&) /home/henry/aflplusplus-isel/llvm-project-latest/llvm/tools/llc/llc.cpp:737:41
#25 0x0000000000417eaa main /home/henry/aflplusplus-isel/llvm-project-latest/llvm/tools/llc/llc.cpp:418:13
#26 0x00007f94f2254c87 __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:344:0
#27 0x00000000004176aa _start (./llvm-project-latest/build-debug/bin/llc+0x4176aa)

[HazyFish]

cc @DataCorrupted

[llvmbot]

@llvm/issue-subscribers-backend-x86