title: What are the possible arguments can be passed to the option of -Xclang of the Clang compiler?
body: <p>I'm using Clang as a front-end of my static analysis tool. I noticed that there is the option <code>-Xclang</code> that allows me to manually manage LLVM passes triggered by Clang.</p>
  <pre><code>-Xclang &lt;arg&gt;           Pass &lt;arg&gt; to the clang compiler
  </code></pre>
  <p>I already knew that <code>-Xclang -disable-llvm-passes</code> will disable all passes. But I could not find any good documentation describing what are the possible arguments passed to <code>-Xclang</code>.</p>
  <p>Does anyone know where I can find more information about <code>-Xclang</code>?</p>
  <p>Thank you very much!</p>