<html>
    <head>
      <base href="http://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 --- - Missing nodes in ForStmt"
   href="http://llvm.org/bugs/show_bug.cgi?id=19037">19037</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Missing nodes in ForStmt
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.4
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Windows NT
          </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>libclang
          </td>
        </tr>

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

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

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Since null nodes are skipped while traversing the tree, it is impossible to
detect which form of a reduced for statement is in effect:

    int main( int, char ** ) {
        for( 0; ; )
            break;
        for( ; 0; )
            break;
        for( ; ; 0 )
            break;
    } 

Quoting from a tree dump:

COMPOUND_STMT @ (1, 26) (id=6, can=6 ())
 FOR_STMT @ (2, 2) (id=7, can=7 ())
  INTEGER_LITERAL @ (2, 7) (id=8, can=8 (), type={INT, tid=5, tcan=5})
  BREAK_STMT @ (3, 3) (id=9, can=9 ())
 FOR_STMT @ (4, 2) (id=10, can=10 ())
  UNEXPOSED_EXPR @ (4, 9) (id=11, can=11 (), type={BOOL, tid=7, tcan=7})
   INTEGER_LITERAL @ (4, 9) (id=12, can=12 (), type={INT, tid=5, tcan=5})
  BREAK_STMT @ (5, 3) (id=13, can=13 ())
 FOR_STMT @ (6, 2) (id=14, can=14 ())
  INTEGER_LITERAL @ (6, 11) (id=15, can=15 (), type={INT, tid=5, tcan=5})
  BREAK_STMT @ (7, 3) (id=16, can=16 ())</pre>
        </div>
      </p>
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