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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Win][X86][AVX512] Clang crashes in COFF emission for 512bit global variables"
href="https://bugs.llvm.org/show_bug.cgi?id=33035">33035</a>
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<th>Summary</th>
<td>[Win][X86][AVX512] Clang crashes in COFF emission for 512bit global variables
</td>
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<th>Product</th>
<td>libraries
</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>Windows NT
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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>MC
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>elad2.cohen@intel.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>Compilation with Clang on Windows platform for source with __m512 global
variables crashes during COFF file emission with the error:
fatal error: error in backend: alignment is limited to 32-bytes
(Originates in llvm/MV/WinCOFFStreamer.cpp function
MCWinCOFFStreamer::EmitCommonSymbol())
Reproducer:
<span class="quote">> cat tst.c</span >
#include<intrin.h>
__m512 x;
int main() {
return 0;
}
<span class="quote">>clang -c -march=skylake-avx512 tst.c</span >
fatal error: error in backend: alignment is limited to 32-bytes</pre>
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