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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - LTO results in crash in whole-module-devirtualization with Assertion `hasInitializer() && "GV doesn't have initializer!"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=38672">38672</a>
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<th>Summary</th>
<td>LTO results in crash in whole-module-devirtualization with Assertion `hasInitializer() && "GV doesn't have initializer!"' failed.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>Linker
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>trent.xin.tong@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I have a small test case that fails to compile on latest LLVM LTO.
~/llvmtot/build-debug/bin/clang++ main.cpp -c
~/llvmtot/build-debug/bin/clang++ -flto -O3 unknown.cpp -c
~/llvmtot/build-debug/bin/clang++ -flto main.o unknown.o -o ab -O3
ld: /home/trentxintong/llvmfb/llvm/include/llvm/IR/GlobalVariable.h:142:
llvm::Constant* llvm::GlobalVariable::getInitializer(): Assertion
`hasInitializer() && "GV doesn't have initializer!"' failed.
[~/linkerbug/reduced]$ cat B.hpp
#include <iostream>
using namespace std;
template <typename T>
class B {
public:
B() {}
virtual void func1() {
std::cout << "func1 called in class B\n";
}
};
[~/linkerbug/reduced]$ cat main.cpp
#include "B.hpp"
void unknown(B<int> *);
int main(int argc, char** argv) {
B<int> a;
unknown(&a);
return 0;
}
[~/linkerbug/reduced]$ cat unknown.cpp
#include "B.hpp"
__attribute__((optnone))
void unknown2(B<int> *y) {}
void unknown(B<int> *x) {
B<int> y;
unknown2(&y);
}</pre>
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