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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Derive alignment from `llvm.assume` outside the use/def chain."
href="http://llvm.org/bugs/show_bug.cgi?id=22049">22049</a>
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<th>Summary</th>
<td>Derive alignment from `llvm.assume` outside the use/def chain.
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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>All
</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
</td>
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<th>Component</th>
<td>Loop Optimizer
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>josh.klontz@gmail.com
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>The issue is explained in full with an example in [1]. In short, the issue
arises when articulating the alignment of a variable/zero sized array in a
struct. In this case, loads and stores from the array don't share a use/def
chain with alignment fact.
[1]
<a href="http://llvm.1065342.n5.nabble.com/Correct-usage-of-llvm-assume-for-loop-vectorization-alignment-td75757.html">http://llvm.1065342.n5.nabble.com/Correct-usage-of-llvm-assume-for-loop-vectorization-alignment-td75757.html</a></pre>
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</p>
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