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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang not devirtualizing final methods based on anonymous namespace info"
href="http://llvm.org/bugs/show_bug.cgi?id=16984">16984</a>
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<th>Summary</th>
<td>clang not devirtualizing final methods based on anonymous namespace info
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</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>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>clattner@apple.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Consider:
class C1 {
virtual void bar();
virtual void baz();
};
namespace {
class C2 : public C1 {
void bar() { baz(); }
void baz() {}
};
}
C1 *test() { return new C2(); }
Clang currently doesn't devirtualize the call from bar() to baz() in C2...
unless you mark C2 with the C++11 "final" attribute. The compiler should be
able to infer "finalness" of the class in this case. This matters for
codebases like LLVM's that are C++'98 and use anonymous namespaces a lot.</pre>
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</p>
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