[clang] [llvm] [AArch64] Implement NEON vscale intrinsics (PR #100347)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-libc-amdgpu-runtime` running on `omp-vega20-1` while building `clang,llvm` at step 7 "Add check check-clang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/73/builds/6203

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

```
Step 7 (Add check check-clang) failure: test (failure)
******************** TEST 'Clang :: CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 4: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/bin/clang -cc1 -internal-isystem /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +neon -target-feature +fp8 -O3 -emit-llvm -o - /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c | /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
+ /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/bin/clang -cc1 -internal-isystem /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +neon -target-feature +fp8 -O3 -emit-llvm -o - /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
+ /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c:2:10: fatal error: 'arm_neon.h' file not found
    2 | #include <arm_neon.h>
      |          ^~~~~~~~~~~~
1 error generated.
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c

--

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

Step 10 (Add check check-offload) failure: 1200 seconds without output running [b'ninja', b'-j 32', b'check-offload'], attempting to kill
...
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug49779.cpp (866 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/test_libc.cpp (867 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug47654.cpp (868 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/wtime.c (869 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug50022.cpp (870 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/bug49021.cpp (871 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/std_complex_arithmetic.cpp (872 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/complex_reduction.cpp (873 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug49021.cpp (874 of 879)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/std_complex_arithmetic.cpp (875 of 879)
command timed out: 1200 seconds without output running [b'ninja', b'-j 32', b'check-offload'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1236.197204

```

</details>

https://github.com/llvm/llvm-project/pull/100347