<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/91559>91559</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Gisel Combiner Limits
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            question,
            llvm:globalisel
      </td>
    </tr>

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

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

<pre>
    I ran into limits on the size of patfrags:
```
def extract_vector_element_cast_frags : GICombinePatFrag<
  (outs root:$dst, $src, $idx), (ins),
  !foreach(op, [G_ADDRSPACE_CAST, G_FPEXT, G_FPTOSI, G_FPTOUI, G_FPTRUNC, G_INTTOPTR,
                G_PTRTOINT, G_SEXT, G_SITOFP, G_TRUNC, G_UITOFP, G_ZEXT, G_ANYEXT],
           (pattern (G_EXTRACT_VECTOR_ELT $dst, $src, $idx), (op $src, $x)))>;
```
It is too large there is a lower limit.

Is there a limit on how many patterns I can register with e.g. G_EXTRACT_VECTOR_ELT as the root?
My tests failed, it looked liked there were patterns that I did not register or there were suddenly wildcard patterns.
</pre>
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