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<body><span class="vcard"><a class="email" href="mailto:vonosmas@gmail.com" title="Alexey Samsonov <vonosmas@gmail.com>"> <span class="fn">Alexey Samsonov</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - -fsanitize=undefined causes very long compile time"
href="http://llvm.org/bugs/show_bug.cgi?id=22063">bug 22063</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>vonosmas@gmail.com
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>DUPLICATE
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - -fsanitize=undefined causes very long compile time"
href="http://llvm.org/bugs/show_bug.cgi?id=22063#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - -fsanitize=undefined causes very long compile time"
href="http://llvm.org/bugs/show_bug.cgi?id=22063">bug 22063</a>
from <span class="vcard"><a class="email" href="mailto:vonosmas@gmail.com" title="Alexey Samsonov <vonosmas@gmail.com>"> <span class="fn">Alexey Samsonov</span></a>
</span></b>
<pre>This is most likely caused by the slowdown in register allocation (see
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Slow register allocation on Lex-generated code compiled with UBSan"
href="show_bug.cgi?id=21349">http://llvm.org/bugs/show_bug.cgi?id=21349</a> and
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - llvm::SpillPlacement::addLinks takes all the time with asan or msan and -O2"
href="show_bug.cgi?id=17409">http://llvm.org/bugs/show_bug.cgi?id=17409</a>).
You can try to build the specific source code file with -fno-sanitize=undefined
to disable UBSan checks in it, or lower optimization level, or add "-mllvm
-regalloc=pbqp" which could work faster.
*** This bug has been marked as a duplicate of <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Slow register allocation on Lex-generated code compiled with UBSan"
href="show_bug.cgi?id=21349">bug 21349</a> ***</pre>
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