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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -fsanitize=undefined causes very long compile time (signed-integer-overflow)"
href="http://llvm.org/bugs/show_bug.cgi?id=22063">22063</a>
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<th>Summary</th>
<td>-fsanitize=undefined causes very long compile time (signed-integer-overflow)
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.5
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>oliverst@online.de
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<pre>When using -fsanitize=undefined I have very long compile times (I am not sure
it ever finished at all) on some files. This issue refers to issues with the
signed-integer-overflow check (on a side note this file also takes a long time
to compile when the vptr check is enabled).
Since the file is question is quite big and has lots of dependencies it's
almost impossible to minimize it. I attached the preprocessed C source code.
The .s is still being written.
I am using the official binary for ubuntu 14.04
(clang+llvm-3.5.0-x86_64-linux-gnu-ubuntu-14.04.tar.xz).
clang version 3.5.0 (tags/RELEASE_350/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.1
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Selected multilib: .;@m64</pre>
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