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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missed optimization: optimize unnecessary std::sort"
href="https://bugs.llvm.org/show_bug.cgi?id=37341">37341</a>
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<th>Summary</th>
<td>Missed optimization: optimize unnecessary std::sort
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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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>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
<tr>
<th>Reporter</th>
<td>zamazan4ik@tut.by
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<pre>clang trunk with -O3 for code below doesn't optimize std::sort (compiler must
remove it from output binary):
#include <algorithm>
#include <numeric>
void foo(int* a, int size)
{
std::sort(a, a + size);
}
int bar(int* a, int b)
{
foo(a, b);
return std::accumulate(a, a + b, 0);
}
GCC has similar behaviour. Is it possible to optimize it?</pre>
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