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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - addvsi3 & subvsi3 don't trap when they should"
href="http://llvm.org/bugs/show_bug.cgi?id=21518">21518</a>
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<th>Summary</th>
<td>addvsi3 & subvsi3 don't trap when they should
</td>
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<th>Product</th>
<td>compiler-rt
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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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>compiler-rt
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>fxcoudert@gcc.gnu.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13307" name="attach_13307" title="Patch fixing the issue">attachment 13307</a> <a href="attachment.cgi?id=13307&action=edit" title="Patch fixing the issue">[details]</a></span>
Patch fixing the issue
The code in {add,sub}v.i3 routines does not trap when it should, because it
performs the actual add/subtract operation in signed arithmetic, rather than
unsigned. I found this when GCC incorrectly uses the symbols from Mac OS X
Yosemite's libcompiler_rt.dylib, and those fail to abort when they should.
(Original GCC bug report is here, explaining some of the context:
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62018">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62018</a>).
The attached patch fixes it. I hope it can help.</pre>
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