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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] v32i16 and v64i8 vectors are passed differently than gcc on with avx512f and no avx512bw in x86-64 ABI"
href="https://bugs.llvm.org/show_bug.cgi?id=42957">42957</a>
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<th>Summary</th>
<td>[X86] v32i16 and v64i8 vectors are passed differently than gcc on with avx512f and no avx512bw in x86-64 ABI
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>LLVM Codegen
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>craig.topper@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
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<pre>gcc passes these in vector registers with just avx512f. Clang is splitting them
into two ymm registers. This is because the backend doesn't consider these
types legal without avx512bw. We probably need to coerce the vectors in the
frontend.</pre>
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