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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [DSE] Stores in loop that are never read are not eliminated"
href="https://bugs.llvm.org/show_bug.cgi?id=46458">46458</a>
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<th>Summary</th>
<td>[DSE] Stores in loop that are never read are not eliminated
</td>
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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>All
</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>florian_hahn@apple.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>In the example below, the stores to the local object P are dead, because they
are never read. However LLVM's DSE does not eliminate them (with or without
MemorySSA): <a href="https://godbolt.org/z/DvTikR">https://godbolt.org/z/DvTikR</a>
void init(int *);
int sum(unsigned N, int y) {
int P[N];
init(&P[0]);
int sum = 0;
for (unsigned i = 0; i < N; i++) {
int x = P[i] + y;
P[i] = x;
sum += x;
}
return sum;
}</pre>
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</p>
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