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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [LICM] Redundant store should be moved to loop post-dominator"
href="https://llvm.org/bugs/show_bug.cgi?id=25336">25336</a>
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<th>Summary</th>
<td>[LICM] Redundant store should be moved to loop post-dominator
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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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</tr>
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>In r251512, I added a test case that was similar to the following:
void test16(unsigned *f) {
for (int i = 65536; i >= 0; i--) {
f[i] = 0;
f[65536] = 1;
}
}
Currently, we write f[65536] on every iteration of the loop. It seems like it
would be possible to push the invariant store out of the loop and transform the
code into something like:
void test16(unsigned *f) {
for (int i = 65536; i >= 0; i--) {
f[i] = 0;
}
f[65536] = 1;
}
This is a contrived test case, but I thought it was worth making a note.</pre>
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