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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Improve instruction selection and scheduling of INC and DEC instructions"
href="http://llvm.org/bugs/show_bug.cgi?id=18598">18598</a>
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<th>Summary</th>
<td>Improve instruction selection and scheduling of INC and DEC instructions
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<th>Product</th>
<td>libraries
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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>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>juergen@apple.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>Currently the X86 backend only creates the INC and DEC instructions in a few
selected cases, where it is certain that it is safe to do so. Nadav suggested
that it would be better to not randomly generate these instruction and instead
have a pass that considers scheduling and the use of the Carry Flag to
determine if it is beneficial to do so. This would also catch cases that we are
currently not even able to identify.</pre>
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