<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/133346>133346</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL] Support space-only resource register annotations
        </td>
    </tr>

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

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

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

<pre>
    Add support for `register(spaceN)` annotation on resources where a space is specified but no register. This annotation instructs the compiler to assign implicit binding for the annotated resource from the provided virtual register space.

```
RWBuffer<float> A : register(u1);        // defaults to space0
RWBuffer<float> B[];                     // gets u2 (unbounded range)
RWBuffer<float> C[3] : register(space1); // gets u0, space1 (range 3)
RWBuffer<float> D : register(space1);    // gets u3, space1

[numthreads(4,1,1)]
void main() {
  A[0] = C[2][0] + D[0] + B[10][0];
}
```
https://godbolt.org/z/rEh7e5a7r
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJx8k09vqzgQwD_NcBk1AhsCOXCApNEeqj1sV9qzwQa8a2zkP1n1ffonA23a6PVZjiJg_JvfjDXMOTlqIWooWiguCQt-MraexH_Gs6Qz_K1uOEcXlsVYj4OxCMfUilE6LyyQyi2sF38COcExRaa18cxLo9FotMKZYHvh8P9JWIEM12CUDt0iejlIwbELHrXBd-IB_56k-wyS2nkbeu_QTwJ7My9SCYve4OaOcl6U7KXHTmou9bhKxtgdIviHCQ7WzOu3xZqb5ILjTVofmPoQ2BwPkDZxH9N9p81f_7RhGIQFeh6UYR7oMzYItMFP3QhZ7ARtcV9ArkCuyMXAgoolmI3_HbDdruET4cvacaPwDgPBmFB3JuhYiGV6FDH7r8lnKFoKxeXReNV5t_7CT4GcN9ssZlr5SL_P8Hv0oz290_deF60Os5-sYNwBqXIg52z7nWJL0uZmJMeZSQ2kAnJCKFtIG8R4NN1Ku6x1khj__o60-OUhtjhL7xFAIwXKy8N9T94vDmizWY-Gd0b5g7EjkOsPIFf7PJWiYKVNeE35iZ5YIuqszGmWnSgpk6k-DX3Xczb0dGC8HFjFGS1FUWZpSTOeD4msSUqKlJKS0LzKywM5VoyTKi9JlefdICBPxcykOih1m2PuRDoXRJ1RSvNjolgnlFtHl5A_Xl5fgMTSE1vH-KcujA7yVEnn3Z3gpVfruK8Higu-7rO9XsaT0ertPi8fU3EfSJcEq-qH7kg_he7QmxnINWba_54Wa_4VvQdyXcUdkOvufqvJzwAAAP__rEld4A">