<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/127428>127428</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [LLVM] error in backend: Broken function found, compilation aborted
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          zhangqingqing24630
      </td>
    </tr>
</table>

<pre>
    I mention this issue to supplement the last issue(https://github.com/llvm/llvm-project/issues/127002). I'm sorry I didn't describe the clearance last time.
This problem cannot be reproduced in the release version, but can be reproduced in the debug version. My command to build the compiler is
`
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_PROJECTS="clang;lld" -S ~/llvm-project/llvm -DCMAKE_INSTALL_PREFIX= ~/build
make -j$(nproc)
`
I tried to debug the problem and found the call stack as follows.

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The function named verify is verified based on the broken field and fails to be verified.

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By setting hardware breakpoints, I can find that the change of Broken is that attr is in the incompatible set.

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all incompatible types are added because Ty is a structure type. Attr is SExt type 

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</pre>
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