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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - missed-optimization: copies of adjacent struct fields are not coalesced"
href="http://llvm.org/bugs/show_bug.cgi?id=19546">19546</a>
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<th>Summary</th>
<td>missed-optimization: copies of adjacent struct fields are not coalesced
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.4
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</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>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>luto@mit.edu
</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>For every optimization setting I've tried, clang 3.4 generates two two-byte
copies for this code:
struct test
{
unsigned short a, b;
};
void copy_test(struct test * __restrict__ out,
const struct test * __restrict__ in)
{
out->a = in->a;
out->b = in->b;
}
It should generate the same code it does for *out = *in.
Sorry if I'm targetting the wrong component.</pre>
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