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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - executable behaves differently with -O0 and -O1 (and higher)"
href="http://llvm.org/bugs/show_bug.cgi?id=17407">17407</a>
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<th>Summary</th>
<td>executable behaves differently with -O0 and -O1 (and higher)
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.1
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>other
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>artasano@sbcglobal.net
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11300" name="attach_11300" title="the source code to reproduce the issue.">attachment 11300</a> <a href="attachment.cgi?id=11300&action=edit" title="the source code to reproduce the issue.">[details]</a></span>
the source code to reproduce the issue.
With the attached source, the generated executable behaves correctly with -O0
switch, but behaves incorrectly with -O1 or higher.
If it worked correctly, you see 'GOOD - thrown Actual value [print()] did not
match [zzz]'
If not, you see 'BAD - did not throw'
I tried to simplify the code for ease of investigation, but this is what as far
as I could go.
There are many trials in the source code.
If I change just one of '// reprodices' sections with '// works' alternative,
it works.
I think the key is at line 80 'catch (const Exception&)'.
If I replace it with 'catch (Exception)', it works.
$ clang++ --version
clang version 3.1 (branches/release_31)
Target: i386-pc-cygwin
Thread model: posix</pre>
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