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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - A Division by Zero does not generate a floating point exception when optimizations are enabled"
href="https://llvm.org/bugs/show_bug.cgi?id=23358">23358</a>
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<th>Summary</th>
<td>A Division by Zero does not generate a floating point exception when optimizations are enabled
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.6
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>release blocker
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>manus@eiffel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following program
#include <stdio.h>
#include <stdlib.h>
int main () {
int volatile l = 123;
int volatile v = (1 / (l - l));
printf ("Value of v is %d\n", v);
}
will not generate a floating point exception when compiled in -O1/-O2/-O3
optimization.
This starded when upgrading the latest Xcode (v6.3) from Apple:
cc --version
Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.3.0
Thread model: posix</pre>
</div>
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