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

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-cmake-x86_64-avx512-linux` running on `avx512-intel64` while building `clang,llvm` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/133/builds/4312

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

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'Clang :: CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 4: /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/bin/clang -cc1 -internal-isystem /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +neon -target-feature +fp8 -O3 -emit-llvm -o - /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/llvm/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c | /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/bin/FileCheck /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/llvm/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
+ /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/bin/clang -cc1 -internal-isystem /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +neon -target-feature +fp8 -O3 -emit-llvm -o - /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/llvm/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
+ /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/bin/FileCheck /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/llvm/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c
/localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/llvm/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:  /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/stage1/bin/FileCheck /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/llvm/clang/test/CodeGen/aarch64-neon-fp8-intrinsics/acle_neon_fscale.c

--

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


```

</details>

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