<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 --- - Code in the false branch of an "if" is executed" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23707&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=XrSPhVH6QWzxQ1iaz1KYMVTztaMfX_ceVzYEOv1wfFg&s=jrT9MYD40pE4_A2QFeLzSUKJqg8J-vpYM4eKJ_S2mto&e=">23707</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Code in the false branch of an "if" is executed
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</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>paumard@users.sourceforge.net
</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>Created <span class=""><a href="attachment.cgi?id=14405" name="attach_14405" title="test case">attachment 14405</a> <a href="attachment.cgi?id=14405&action=edit" title="test case">[details]</a></span>
test case
Hi,
I downloaded llvm and clang today from svn trunk. I built it on Debian Jessie
(libc++ from GCC 4.9 provided by Debian).
When I build the attached code with -O1 or -O2 and then execute it, the code
fails with SIGFPE. The division by 0 is in the false branch of an "if", so this
code should not be executed.
The example is minimal: removing cerr output or uncommenting either of the
commented-out lines results in correct behaviour.
The issue is not present when compiling with -O0, with clang++-3.4 or 3.5, or
with g++.
The bug has been reported as a Debian bug first but is present in trunk:
<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__bugs.debian.org_787217&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=XrSPhVH6QWzxQ1iaz1KYMVTztaMfX_ceVzYEOv1wfFg&s=ave7L6JAXlc3SO3RYxiIo7AnsHF8yRfE1z3p9sWd2GQ&e=">http://bugs.debian.org/787217</a>
Kind regards, Thibaut.</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>