[clang] [llvm] [RISCV] Add Andes XAndesVBFHCvt (Andes Vector BFLOAT16 Conversion) extension (PR #144320)

[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 `clang,llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/3/builds/17667

<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 'Clang :: Preprocessor/riscv-target-features-andes.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/buildbot/worker/arc-folder/build/bin/clang --target=riscv32-unknown-linux-gnu -march=rv32i -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c    -o - | /buildbot/worker/arc-folder/build/bin/FileCheck /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c # RUN: at line 1
+ /buildbot/worker/arc-folder/build/bin/clang --target=riscv32-unknown-linux-gnu -march=rv32i -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c -o -
+ /buildbot/worker/arc-folder/build/bin/FileCheck /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c
/buildbot/worker/arc-folder/build/bin/clang --target=riscv64-unknown-linux-gnu -march=rv64i -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c    -o - | /buildbot/worker/arc-folder/build/bin/FileCheck /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c # RUN: at line 3
+ /buildbot/worker/arc-folder/build/bin/clang --target=riscv64-unknown-linux-gnu -march=rv64i -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c -o -
+ /buildbot/worker/arc-folder/build/bin/FileCheck /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c
/buildbot/worker/arc-folder/build/bin/clang --target=riscv32    -march=rv32i_xandesperf -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c    -o - | /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESPERF /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c # RUN: at line 10
+ /buildbot/worker/arc-folder/build/bin/clang --target=riscv32 -march=rv32i_xandesperf -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c -o -
+ /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESPERF /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c
/buildbot/worker/arc-folder/build/bin/clang --target=riscv64    -march=rv64i_xandesperf -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c    -o - | /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESPERF /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c # RUN: at line 13
+ /buildbot/worker/arc-folder/build/bin/clang --target=riscv64 -march=rv64i_xandesperf -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c -o -
+ /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESPERF /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c
/buildbot/worker/arc-folder/build/bin/clang --target=riscv32    -march=rv32i_xandesvbfhcvt -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c    -o - | /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESVBFHCVT /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c # RUN: at line 18
+ /buildbot/worker/arc-folder/build/bin/clang --target=riscv32 -march=rv32i_xandesvbfhcvt -E -dM /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c -o -
+ /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESVBFHCVT /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c
clang: error: invalid arch name 'rv32i_xandesvbfhcvt', unsupported non-standard user-level extension 'xandesvbfhcvt'
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /buildbot/worker/arc-folder/build/bin/FileCheck --check-prefix=CHECK-XANDESVBFHCVT /buildbot/worker/arc-folder/llvm-project/clang/test/Preprocessor/riscv-target-features-andes.c

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/144320