<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/88369>88369</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [RISC-V] Defining fixed-size RVV tuple types
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

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

<pre>
    Hello,

I have a question regarding the use of the _-mrvv-vector-bits_ attribute for defining fixed-length variants of RVV tuple data types(e.g. vint8m1x2_t).

```
#include <riscv_vector.h>

#if defined(__riscv_v_fixed_vlen)
typedef vint8m1_t fixed_vint8m1_t __attribute__((riscv_rvv_vector_bits(__riscv_v_fixed_vlen)));
typedef vint8m1x2_t fixed_vint8m1x2_t __attribute__((riscv_rvv_vector_bits(__riscv_v_fixed_vlen*2)));
#endif
```
Produces an error:
```
main.c:6:54: error: 'riscv_rvv_vector_bits' attribute applied to non-RVV type 'vint8m1x2_t' (aka '__rvv_int8m1x2_t')
    6 | typedef vint8m1x2_t fixed_vint8m1x2_t __attribute__((riscv_rvv_vector_bits(__riscv_v_fixed_vlen*2)));
      | ^
```

Using Clang18(release/18.x - c13b7485b87909fcf739f62cfa382b55407433c0)
`clang -march=rv64gcv --target=riscv64-unknown-linux-gnu -o rvv_test main.c -mrvv-vector-bits=zvl`

Is there another way to define fixed-size tuple types?
</pre>
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