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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - (manual) fixed point math: scale reduction"
href="https://bugs.llvm.org/show_bug.cgi?id=40629">40629</a>
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<th>Summary</th>
<td>(manual) fixed point math: scale reduction
</td>
</tr>
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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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Scalar Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>lebedev.ri@gmail.com
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>int yy(int x) {
return (((10 * x) / 3) + 5) / 10;
}
int yy2(int x) {
return (((2 * x) / 3) + 1) / 2;
}
yy and yy2 are equivalent: <a href="https://rise4fun.com/Alive/tF61">https://rise4fun.com/Alive/tF61</a>
yy2 results in better codegen.
I don't //really// expect this to be solved,
just thought i'd report for completeness
Refs <a href="https://github.com/google/souper/issues/438">https://github.com/google/souper/issues/438</a> (more TLDR)</pre>
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