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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - UBSan misses check for "negative_value << 0""
href="https://bugs.llvm.org/show_bug.cgi?id=33133">33133</a>
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<th>Summary</th>
<td>UBSan misses check for "negative_value << 0"
</td>
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<th>Product</th>
<td>clang
</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>libclang
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>babokin@gmail.com
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<th>CC</th>
<td>klimek@google.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre><span class="quote">> cat f.cpp</span >
int i = -1;
int z = 0;
int main() {
return (i << 0) + (i << z);
}
<span class="quote">> clang++ -fsanitize=undefined f.cpp</span >
<span class="quote">> ./a.out</span >
No error is issued.</pre>
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