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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [AArch64] Set preferred loop alignment"
href="https://llvm.org/bugs/show_bug.cgi?id=25121">25121</a>
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<th>Summary</th>
<td>[AArch64] Set preferred loop alignment
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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>mssimpso@codeaurora.org
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
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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>Each target can specify a preferred loop alignment. Currently, X86, PowerPC and
Hexagon set the default alignment to 16 bytes. The AArch64 target defaults to
zero, which means AArch64 does not care about loop alignment.
AFAICT, the parameter is used by the block placement pass to align single basic
block loops. We should investigate setting the preferred loop alignment.
// Find defs
grep -r setPrefLoopAlignment llvm
// Find uses
grep -r getPrefLoopAlignment llvm</pre>
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