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    <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 --- - MIR parsing of BranchProbability is broken"
   href="https://llvm.org/bugs/show_bug.cgi?id=28774">28774</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>MIR parsing of BranchProbability is broken
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>tools
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </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>llc
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>d.c.ddcc@gmail.com
          </td>
        </tr>

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

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The branch probability is printed as e.g. "successors:
%bb.2.for.body(0x7c000000 / 0x80000000 = 96.88%)" by BranchProbability.cpp:31:

OS << format("0x%08" PRIx32 " / 0x%08" PRIx32 " = %.2f%%", N, D, Percent);

But this is parsed by MIParser.cpp:463 as:

if (consumeIfPresent(MIToken::lparen)) {
  if (Token.isNot(MIToken::IntegerLiteral))
    return error("expected an integer literal after '('");
  if (getUnsigned(Weight))
    return true;
  lex();
  if (expectAndConsume(MIToken::rparen))
    return true;
}</pre>
        </div>
      </p>
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