<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/132554>132554</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            excessive compile-time and memory usage with `-fsanitize=undefined`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            compiler-rt:ubsan,
            slow-compile,
            incomplete
      </td>
    </tr>

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

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

<pre>
    Some (mostly generated) files from https://github.com/mamedev/mame take several minutes to compile with `-fsanitize=undefined` - e.g. `src/devices/cpu/m68000/m68000-sdf.cpp`.

They also consume a lot of memory during compilation:
```
    PID USER      PR  NI    VIRT    RES    SHR S %CPU  %MEM     TIME+ COMMAND                         
3190941 user      20 0 2333788   2,1g 151380 R 100,0  14,1   1:00.92 clang++
```

I do not now what information to provide for this to proceed so I am waiting for feedback.

IIRC this also applies to `-fsanitize=address`.
</pre>
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