llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `arc-builder` running on 
`arc-worker` while building `clang,llvm` at step 6 
"test-build-unified-tree-check-all".

Full details are available at: 
https://lab.llvm.org/buildbot/#/builders/3/builds/29627

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/X86/sse2-intrinsics-fast-isel.ll' 
FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/buildbot/worker/arc-folder/build/bin/llc < 
/buildbot/worker/arc-folder/llvm-project/llvm/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
 -show-mc-encoding -fast-isel -mtriple=i386-unknown-unknown -mattr=+sse2 | 
/buildbot/worker/arc-folder/build/bin/FileCheck 
/buildbot/worker/arc-folder/llvm-project/llvm/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
 --check-prefixes=CHECK,X86,SSE,X86-SSE
# executed command: /buildbot/worker/arc-folder/build/bin/llc -show-mc-encoding 
-fast-isel -mtriple=i386-unknown-unknown -mattr=+sse2
# .---command stderr------------
# | LLVM ERROR: Cannot select: intrinsic %llvm.x86.sse2.clflush
# | 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: /buildbot/worker/arc-folder/build/bin/llc 
-show-mc-encoding -fast-isel -mtriple=i386-unknown-unknown -mattr=+sse2
# | 1.  Running pass 'Function Pass Manager' on module '<stdin>'.
# | 2.  Running pass 'X86 DAG->DAG Instruction Selection' on function 
'@test_mm_clflush'
# |  #0 0x0000000002479798 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) 
(/buildbot/worker/arc-folder/build/bin/llc+0x2479798)
# |  #1 0x0000000002476635 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
# |  #2 0x00007f0d560a1630 __restore_rt sigaction.c:0:0
# |  #3 0x00007f0d54df13d7 raise (/usr/lib64/libc.so.6+0x363d7)
# |  #4 0x00007f0d54df2ac8 abort (/usr/lib64/libc.so.6+0x37ac8)
# |  #5 0x000000000073c7f9 llvm::json::operator==(llvm::json::Value const&, 
llvm::json::Value const&) (.cold) JSON.cpp:0:0
# |  #6 0x00000000021f0689 
llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) 
(/buildbot/worker/arc-folder/build/bin/llc+0x21f0689)
# |  #7 0x00000000021f55d2 
llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, 
unsigned int, unsigned char const*) 
(/buildbot/worker/arc-folder/build/bin/llc+0x21f55d2)
# |  #8 0x00000000009a02ce (anonymous 
namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) X86ISelDAGToDAG.cpp:0:0
# |  #9 0x00000000021ebe1f llvm::SelectionDAGISel::DoInstructionSelection() 
(/buildbot/worker/arc-folder/build/bin/llc+0x21ebe1f)
# | #10 0x00000000021fefc8 llvm::SelectionDAGISel::CodeGenAndEmitDAG() 
(/buildbot/worker/arc-folder/build/bin/llc+0x21fefc8)
# | #11 0x0000000002202b7c 
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) 
(/buildbot/worker/arc-folder/build/bin/llc+0x2202b7c)
# | #12 0x0000000002203fac 
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) 
(/buildbot/worker/arc-folder/build/bin/llc+0x2203fac)
# | #13 0x00000000021eb62f 
llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) 
(/buildbot/worker/arc-folder/build/bin/llc+0x21eb62f)
# | #14 0x00000000012a2fc7 
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) 
MachineFunctionPass.cpp:0:0
# | #15 0x000000000192f42b llvm::FPPassManager::runOnFunction(llvm::Function&) 
(/buildbot/worker/arc-folder/build/bin/llc+0x192f42b)
# | #16 0x000000000192f7d1 llvm::FPPassManager::runOnModule(llvm::Module&) 
(/buildbot/worker/arc-folder/build/bin/llc+0x192f7d1)
# | #17 0x00000000019303e5 llvm::legacy::PassManagerImpl::run(llvm::Module&) 
(/buildbot/worker/arc-folder/build/bin/llc+0x19303e5)
# | #18 0x0000000000816bcc compileModule(char**, 
llvm::SmallVectorImpl<llvm::PassPlugin>&, llvm::LLVMContext&, 
std::__cxx11::basic_string<char, std::char_traits<char>, 
std::allocator<char>>&) llc.cpp:0:0
# | #19 0x0000000000744d6c main 
(/buildbot/worker/arc-folder/build/bin/llc+0x744d6c)
# | #20 0x00007f0d54ddd555 __libc_start_main (/usr/lib64/libc.so.6+0x22555)
# | #21 0x000000000080ba76 _start 
(/buildbot/worker/arc-folder/build/bin/llc+0x80ba76)
# `-----------------------------
# error: command failed with exit status: -6
# executed command: /buildbot/worker/arc-folder/build/bin/FileCheck 
/buildbot/worker/arc-folder/llvm-project/llvm/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
 --check-prefixes=CHECK,X86,SSE,X86-SSE
# .---command stderr------------
# | 
/buildbot/worker/arc-folder/llvm-project/llvm/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll:399:14:
 error: SSE-LABEL: expected string not found in input
# | ; SSE-LABEL: test_mm_bsrli_si128:
# |              ^
# | <stdin>:171:21: note: scanning from here
# | test_mm_bslli_si128: # @test_mm_bslli_si128
# |                     ^
# | <stdin>:179:9: note: possible intended match here
# |  .globl test_mm_bsrli_si128 
# |         ^
...

```

</details>

https://github.com/llvm/llvm-project/pull/183634
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