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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Regression(r178606): Clang runs out of registers when building libyuv's row_posix for 32bit with -fPIC"
href="http://llvm.org/bugs/show_bug.cgi?id=15798">15798</a>
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<th>Summary</th>
<td>Regression(r178606): Clang runs out of registers when building libyuv's row_posix for 32bit with -fPIC
</td>
</tr>
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<th>Product</th>
<td>clang
</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>
</tr>
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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>Driver
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>nicolasweber@gmx.de
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=10387" name="attach_10387" title="Repro case out.ii">attachment 10387</a> <a href="attachment.cgi?id=10387&action=edit" title="Repro case out.ii">[details]</a></span>
Repro case out.ii
thakis@yearofthelinuxdesktop:/usr/local/google/chrome/src$
third_party/llvm-build/Release+Asserts/bin/clang --versionclang version 3.3
(trunk 178606)
Target: x86_64-unknown-linux-gnu
Thread model: posix
thakis@yearofthelinuxdesktop:/usr/local/google/chrome/src$
third_party/llvm-build/Release+Asserts/bin/clang -c out.ii -m32 -fPIC
../../third_party/libyuv/source/row_posix.cc:1825:5: error: ran out of
registers during register allocation
"movdqa %[kShuffleMaskARGBToRGB24_0],%%xmm5 \n"
^
../../third_party/libyuv/source/row_posix.cc:1880:5: error: ran out of
registers during register allocation
"movdqa %[kShuffleMaskARGBToRAW_0],%%xmm5 \n"
^
2 errors generated.
Used to work one revision earlier:
thakis@yearofthelinuxdesktop:/usr/local/google/chrome/src$
third_party/llvm-build/Release+Asserts/bin/clang --version
clang version 3.3 (trunk 178605)
Target: x86_64-unknown-linux-gnu
Thread model: posix
thakis@yearofthelinuxdesktop:/usr/local/google/chrome/src$
third_party/llvm-build/Release+Asserts/bin/clang -c out.ii -m32 -fPIC
# works
I suppose the workaround is to pass -momit-leaf-frame-pointer, which
effectively reverts r178606 user-side, but the change description doesn't say
why the change was done and the change does regress functionality, so maybe it
should be undone as well.</pre>
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