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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 generates layout incompatible with gcc and icc"
href="http://llvm.org/bugs/show_bug.cgi?id=18513">18513</a>
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<th>Summary</th>
<td>clang generates layout incompatible with gcc and icc
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.majnemer@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>consider:
typedef __SIZE_TYPE__ size_t;
extern "C" int printf(const char *, ...);
static char buffer[419430400];
inline void *operator new(size_t, void *pv) { return pv; }
struct A {
__attribute__((aligned(32))) bool AField;
A() {}
};
struct B : A {
__attribute__((aligned(16))) long long : 1;
bool BField;
B() {
printf("BField: %ld\n", (long)((char *)&BField - buffer));
}
};
int main() { new (buffer) B; }
gcc and icc give:
BField: 17
clang gives:
BField: 2</pre>
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