<html>
    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [PM] Use new PM in production for Clang, LLD, libLTO, etc. middle-end"
   href="https://llvm.org/bugs/show_bug.cgi?id=28323">28323</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[PM] Use new PM in production for Clang, LLD, libLTO, etc. middle-end
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>new bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>chisophugis@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Blocks</th>
          <td>28322
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>This bug tracks progress towards moving the main middle-end compilation
codepath of Clang, LLD, libLTO, etc. to the new PM.

Clang will be the most work for this. Essentially the entirety of
PassManagerBuilder in lib/Transforms/IPO/PassManagerBuilder.cpp needs to be
ported, including the "extension" point stuff.

The part of PassBuilder (lib/Passes/PassBuilder.cpp) which seems intended to
replace PassManagerBuilder is mostly FIXME's at the time of this writing.

Porting the LTO use case seems like a good first step.</pre>
        </div>
      </p>
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