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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missed exception call elimination"
href="https://bugs.llvm.org/show_bug.cgi?id=46850">46850</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Missed exception call elimination
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.bolvansky@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Initially posted at rust github: <a href="https://github.com/rust-lang/rust/issues/65969">https://github.com/rust-lang/rust/issues/65969</a>
Code:
<a href="https://github.com/rust-lang/rust/issues/65969">https://github.com/rust-lang/rust/issues/65969</a>
#include <vector>
int foo(std::vector<int> const& a, std::vector<int> const& b) {
int index = 0;
int x = 0;
for (int i = 0; i < a.size(); i++) {
for (int j = 0; j < b.size(); i++) {
if (i == j) {
// llvm cannot eliminate exception call "out of range"
// gcc can
x = a.at(index);
index += 1;
break;
}
}
}
return x;
}
Godbolt: <a href="https://godbolt.org/z/sxGhMW">https://godbolt.org/z/sxGhMW</a></pre>
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