<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/60636>60636</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Compound literal C99 warning
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          tfabric76
      </td>
    </tr>
</table>

<pre>
    When compiling eigen (clang 14) with AVX enabled, below warning (error) is encountered:
`
/mnt/c/git/content_analyzer/submodules/eigen/Eigen/src/Core/arch/Default/Half.h:415:9: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions]
  h.x = _cvtss_sh(ff, 0);
`
due to this C99 compound literal:
` ^
/usr/lib/llvm-14/lib/clang/14.0.6/include/f16cintrin.h:69:55: note: expanded from macro '_cvtss_sh'
  ((unsigned short)(((__v8hi)__builtin_ia32_vcvtps2ph((__v4sf){a, 0, 0, 0}, \
`
It seems like this resolves the issue:
` ^
/usr/lib/llvm-14/lib/clang/14.0.6/include/f16cintrin.h:69:55: note: expanded from macro '_cvtss_sh'
  ((unsigned short)(((__v8hi)__builtin_ia32_vcvtps2ph({a, 0, 0, 0}, \
`
or
`
#define _cvtss_sh(a, imm) \
  (__v4sf q = {a, 0, 0, 0}; (unsigned short)(((__v8hi)__builtin_ia32_vcvtps2ph(q, \
 (imm)))[0]))
`


</pre>
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