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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [MS ABI] dllimport'd class specialization w/ virtual base causes IRGen to go off the rails"
href="https://llvm.org/bugs/show_bug.cgi?id=26686">26686</a>
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<th>Summary</th>
<td>[MS ABI] dllimport'd class specialization w/ virtual base causes IRGen to go off the rails
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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
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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
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>david.majnemer@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>consider:
class A {
virtual void m_fn1();
};
template <typename>
struct B : virtual A {};
extern template class __declspec(dllimport) B<int>;
B<int> b;
run with:
~/llvm/Debug+Asserts/bin/clang -cc1 -x c++ -triple i686-pc-win32
-fms-extensions -S -o t.cpp -fno-rtti -emit-llvm -O2 -disable-llvm-optzns
we get:
Global is marked as dllimport, but not external
[2 x i32]* @"\01??_8?$B@H@@7B@"
fatal error: error in backend: Broken module found, compilation aborted!</pre>
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