<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54419>54419</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Source-based code coverage incorrectly handles if constexpr block
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang,
            coverage
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          chfast
      </td>
    </tr>
</table>

<pre>
    When a `if constexpr` has a block `{}` and the condition is false, the source-based code coverage always marks the opening `{` as not-executed region (see line 4).

Tested with clang 14.

```
    1|       |template <int C>
    2|      1|int test() {
    3|      1|    if constexpr (C == 0)
  ------------------
  |  Branch (3:19): [Folded - Ignored]
  ------------------
    4|      0|    {
    5|      1|        return 1;
    6|      1|    }
    7|      1|    return 0;
    8|      1|}
    9|       |
   10|       |int main()
   11|      1|{
   12|      1|    return test<1>();
   13|      1|}

```
</pre>
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