<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 --- - Invalid diag "error: invalid argument type 'struct foo *' to unary expression""
   href="https://llvm.org/bugs/show_bug.cgi?id=30217">30217</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Invalid diag "error: invalid argument type 'struct foo *' to unary expression"
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.9
          </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>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>funfunctor@folklore1984.net
          </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>Created <span class=""><a href="attachment.cgi?id=17192" name="attach_17192" title="Reduced test case.">attachment 17192</a> <a href="attachment.cgi?id=17192&action=edit" title="Reduced test case.">[details]</a></span>
Reduced test case.

Hi,

While building the attached test case using the OpenCL frontend the canonical
form of checking pointer nullity is treated in a way that results in an invalid
diagnostic error raised.


FAILS:

```
if (!ptr)
  ...

```

PASSES:

```
if (ptr == NULL)
  ...

```

Compile with: $ clang -S -emit-llvm -o test.ll -x cl test.cl

Kind Regards,
Edward.</pre>
        </div>
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