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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - hexagon calling convention lowering miscompiles passing empty classes in C++"
href="https://bugs.llvm.org/show_bug.cgi?id=33009">33009</a>
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<th>Summary</th>
<td>hexagon calling convention lowering miscompiles passing empty classes in C++
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
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<th>Assignee</th>
<td>kparzysz@codeaurora.org
</td>
</tr>
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Testcase:
#include <stdio.h>
#define DUMP(ptr) printf("%s %p\\n", __PRETTY_FUNCTION__, ptr)
struct A {
A() { DUMP(this); }
A(const A&) { DUMP(this); }
~A() { DUMP(this); }
};
void f(A a) { DUMP(&a); }
int main() { f(A()); }
Note that the address of the A object within f is not the address of an object
for which a constructor or destructor is ever run. f is lowered to a
zero-argument LLVM function.</pre>
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