<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/66461>66461</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Is there a way to prevent non-constant values from being optimized?
        </td>
    </tr>

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

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

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

<pre>
    I'm currently making llvm pass.
When compiling, the cpp application is optimized by the various passes(Simple Register Coalescing pass and etc) behind my pass, resulting in a crash.

The cause is the code below.
replaceUsesOfWith(Constant, Non-constant);

Non-constant has an address Value* assigned as malloc().

To prevent optimization, the following attempts failed.
1. Add metadata per inst
2. Add volatile (true) per inst
3. 3. addFnAttr(llvm::Attribute::OptimizeNone);

Is there any other way I can try?
</pre>
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