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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missed optimization opportunity: replacing logical or with bitwise."
href="https://bugs.llvm.org/show_bug.cgi?id=37747">37747</a>
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<th>Summary</th>
<td>Missed optimization opportunity: replacing logical or with bitwise.
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>6.0
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<th>Hardware</th>
<td>PC
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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
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>denis.yaroshevskij@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<p>
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<pre>std::accumulate(,,,std::bit_or{}) is much faster than
std::accumulate(,,,std::logical_or{}) even though they have the same semantics.
Since there is no branching on the result of the or in accumulate, the compiler
could substitute logical for the bit one.
QuickBench: <a href="http://quick-bench.com/OhizrjUK_8KaF3qa4Bv4LzjEXy8">http://quick-bench.com/OhizrjUK_8KaF3qa4Bv4LzjEXy8</a></pre>
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