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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - LoopVectorizer: setAlreadyVectorized needs to set width and unroll to one"
href="http://llvm.org/bugs/show_bug.cgi?id=17662">17662</a>
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<th>Summary</th>
<td>LoopVectorizer: setAlreadyVectorized needs to set width and unroll to one
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<th>Product</th>
<td>tools
</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
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>opt
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>aschwaighofer@apple.com
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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>/// Mark the loop L as already vectorized by setting the width to 1.
void setAlreadyVectorized(Loop *L)
We should set width *and* unroll to one. Because this is how we use it:
LoopVectorizeHints Hints(L, DisableUnrolling);
if (Hints.Width == 1 && Hints.Unroll == 1) {
DEBUG(dbgs() << "LV: Not vectorizing.\n");
return false;
}
We need to make sure that we set both otherwise we analyze vectorized loops
again.</pre>
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