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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [SLP][AArch64] Implement cost model for intrinsics."
href="https://llvm.org/bugs/show_bug.cgi?id=30258">30258</a>
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<th>Summary</th>
<td>[SLP][AArch64] Implement cost model for intrinsics.
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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
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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>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
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<th>CC</th>
<td>bmakam@codeaurora.org, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<div>
<pre>In r270537, Simon added the framework for an intrinsic cost model in the X86
backend. We should consider doing the same for AArch64 as this may expose
opportunities in the SLP vectorizer.
Currently, X86 supports bitreverse, bswap, ctlz, ctpop, and cttz. I want to
say AArch64 has support for most of these in vector form. However, I don't
know how well the AArch64 backend handles the lowering of these intrinsics.</pre>
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