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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Consecutive and adjacent calls to memcpy are not merged."
href="https://bugs.llvm.org/show_bug.cgi?id=46081">46081</a>
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<th>Summary</th>
<td>Consecutive and adjacent calls to memcpy are not merged.
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>10.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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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>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>peter.fordham@gmail.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>In this example memcpy is called 1024 times with consequtive calls to directly
adjacent ememory locations. This could be reduce to a single call to memcpy.
<a href="https://godbolt.org/z/taKi4G">https://godbolt.org/z/taKi4G</a>
Replacing the assignment in the loop with std::copy, here
<a href="https://godbolt.org/z/H3DsN9">https://godbolt.org/z/H3DsN9</a> correctly only calls memcpy once.</pre>
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