<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 --- - -Wundefined-bool-conversion not raised in all cases where optimization is applied"
href="http://llvm.org/bugs/show_bug.cgi?id=21726">21726</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>-Wundefined-bool-conversion not raised in all cases where optimization is applied
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.5
</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>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>clang@martinien.de
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Hi,
in function indirect() below, no warning for the check of the address of the
reference is raised, but the check is still optimized out at -O1. This is a big
problem for codebases that have such constructs, since it can be hard to track
down the resulting errors at runtime. direct() raises the warning as expected.
int indirect()
{
int a = 42;
int &r = a;
int *p = &r;
if (p) // no warning!
return 0;
else
return 1;
}
int direct()
{
int a = 42;
int &r = a;
if (&r) // -Wundefined-bool-conversion
return 0;
else
return 1;
}
Best regards,
Martin</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>