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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - wrong code at -O2 on x86_64-linux-gnu"
href="https://bugs.llvm.org/show_bug.cgi?id=50902">50902</a>
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<th>Summary</th>
<td>wrong code at -O2 on x86_64-linux-gnu
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</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>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>qrzhang@gatech.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>It appears to be a regression in clang-11.
$ clang-trunk -v
clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
043ce4e6bdd376ff460d78446d1a6b94c6e0f18c)
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ clang-trunk abc.c ; ./a.out
0
$ clang-trunk -O2 abc.c ; ./a.out
Floating point exception
$ cat abc.c
int a, b, c, d;
char e[8];
char f;
int(g)(h, i) { return i && h < -1 / i; }
int main() {
int j = 1;
if (b)
c = j = 0;
if (g(j, &e[7] == &f))
d = 1;
printf("%X\n", a);
}</pre>
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</p>
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