[llvm] [llvm][RISCV] Support Zvfofp8min llvm intrinsics and codegen (PR #172585)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/3/builds/26614

<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 0x00000000023be2b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/buildbot/worker/arc-folder/build/bin/llc+0x23be2b8)
# |  #1 0x00000000023bb1c5 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
# |  #2 0x00007fe51d9b7630 __restore_rt sigaction.c:0:0
# |  #3 0x00007fe51c7073d7 raise (/usr/lib64/libc.so.6+0x363d7)
# |  #4 0x00007fe51c708ac8 abort (/usr/lib64/libc.so.6+0x37ac8)
# |  #5 0x00000000007304bf llvm::json::operator==(llvm::json::Value const&, llvm::json::Value const&) (.cold) JSON.cpp:0:0
# |  #6 0x000000000213db69 llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/buildbot/worker/arc-folder/build/bin/llc+0x213db69)
# |  #7 0x0000000002142811 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/buildbot/worker/arc-folder/build/bin/llc+0x2142811)
# |  #8 0x00000000009756f7 (anonymous namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) X86ISelDAGToDAG.cpp:0:0
# |  #9 0x00000000021392ff llvm::SelectionDAGISel::DoInstructionSelection() (/buildbot/worker/arc-folder/build/bin/llc+0x21392ff)
# | #10 0x0000000002149cb8 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/buildbot/worker/arc-folder/build/bin/llc+0x2149cb8)
# | #11 0x000000000214d560 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/buildbot/worker/arc-folder/build/bin/llc+0x214d560)
# | #12 0x000000000214ea8c llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/buildbot/worker/arc-folder/build/bin/llc+0x214ea8c)
# | #13 0x0000000002138b0f llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/buildbot/worker/arc-folder/build/bin/llc+0x2138b0f)
# | #14 0x000000000123a247 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
# | #15 0x00000000018b9afb llvm::FPPassManager::runOnFunction(llvm::Function&) (/buildbot/worker/arc-folder/build/bin/llc+0x18b9afb)
# | #16 0x00000000018b9ea1 llvm::FPPassManager::runOnModule(llvm::Module&) (/buildbot/worker/arc-folder/build/bin/llc+0x18b9ea1)
# | #17 0x00000000018baab5 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/buildbot/worker/arc-folder/build/bin/llc+0x18baab5)
# | #18 0x000000000081523e 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 0x0000000000738e34 main (/buildbot/worker/arc-folder/build/bin/llc+0x738e34)
# | #20 0x00007fe51c6f3555 __libc_start_main (/usr/lib64/libc.so.6+0x22555)
# | #21 0x0000000000809d56 _start (/buildbot/worker/arc-folder/build/bin/llc+0x809d56)
# `-----------------------------
# 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>:170:21: note: scanning from here
# | test_mm_bslli_si128: # @test_mm_bslli_si128
# |                     ^
# | <stdin>:178:9: note: possible intended match here
# |  .globl test_mm_bsrli_si128 # 
# |         ^
...

```

</details>

https://github.com/llvm/llvm-project/pull/172585