<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - _Atomic struct can hang compiler"
   href="https://bugs.llvm.org/show_bug.cgi?id=45476">45476</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>_Atomic struct can hang compiler
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>9.0
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>enhancement
          </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>vtjnash@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Running this:
```
$ clang-9 -x c++ -S - -std=c++11
typedef signed char int8_t;
struct i8_3 {
    int8_t a;
    int8_t b;
    int8_t c;
};

_Atomic struct i8_3 a;
void jwn1() {
    a = i8_3{1, 2, 3};
}

int8_t jwn2() {
    return a.a + a.b + a.c;
}
```
The compile never finishes. Possibly similar to #14442?</pre>
        </div>
      </p>


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