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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - AVX512 Segfault: alignment incorrect for relative addressing"
href="https://llvm.org/bugs/show_bug.cgi?id=30693">30693</a>
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<th>Summary</th>
<td>AVX512 Segfault: alignment incorrect for relative addressing
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>trunk
</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
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>Roland.Schulz@Intel.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Steps to reproduce:
git clone -b clang <a href="https://github.com/rolandschulz/gromacs.git">https://github.com/rolandschulz/gromacs.git</a>
cd gromacs
mkdir build
cd build
FLAGS=-g; CFLAGS=$FLAGS CXXFLAGS=$FLAGS CC=clang CXX=clang++ cmake .. -GNinja
-DGMX_SIMD=AVX_512_KNL -DGMX_BUILD_HELP=OFF -DBUILD_SHARED_LIBS=no
-DGMX_HWLOC=no -DGMX_OPENMP=no
ninja mdrun-test
./bin/mdrun-test
--gtest_filter=MdrunCanWrite/Trajectories.ThatDifferInNstxout/0
It segfaults on
0x00000000009f4622 <+370>: vmovdqa 0x5b6fa(%rip),%xmm7 # 0xa4fd2
That relative address is not aligned to 16 and thus segfaults.
Sorry I have no idea how to produce a small test case for this.</pre>
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