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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Excessive compile time with -fsanitize=undefined"
href="http://llvm.org/bugs/show_bug.cgi?id=22665">22665</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Excessive compile time with -fsanitize=undefined
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>octoploid@yandex.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13930" name="attach_13930" title="testcase">attachment 13930</a> <a href="attachment.cgi?id=13930&action=edit" title="testcase">[details]</a></span>
testcase
markus@x4 src % time gcc -g -fsanitize=undefined -O3 -fPIC -msse2
-DHAVE_CONFIG_H -I../easel -I../libdivsufsort -I../easel -I. -I. -o
generic_optacc.o -c generic_optacc.c
-> 1.33s user 0.03s system 99% cpu 1.364 total
markus@x4 src % time clang -g -fsanitize=undefined -O3 -fPIC -msse2
-DHAVE_CONFIG_H -I../easel -I../libdivsufsort -I../easel -I. -I. -o
generic_optacc.o -c generic_optacc.c
-> 645.92s user 0.25s system 99% cpu 10:46.25 total
perf shows:
24.69% libLLVMCodeGen.so.3.7.0svn [.] (anonymous
namespace)::InlineSpiller::propagateSiblingValue
23.47% libLLVMSupport.so.3.7.0svn [.]
llvm::BranchProbability::scale
13.35% libLLVMCodeGen.so.3.7.0svn [.] (anonymous
namespace)::InlineSpiller::traceSiblingValue
11.91% libLLVMCodeGen.so.3.7.0svn [.]
llvm::MachineBlockFrequencyInfo::getBlockFreq
3.26% libLLVMSupport.so.3.7.0svn [.]
llvm::BlockFrequency::operator*=
...</pre>
</div>
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