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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - __attribute__((used)) ignored in templated classes"
href="http://llvm.org/bugs/show_bug.cgi?id=17480">17480</a>
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<th>Summary</th>
<td>__attribute__((used)) ignored in templated classes
</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>Windows XP
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<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>llvm@meinersbur.de
</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>Test program test.cpp:
static __attribute__((used)) void Afunc() {}
class testclass2 {
__attribute__((used)) void Bfunc() {}
};
testclass2 xxx;
template<typename T>
class testclass3 {
__attribute__((used)) void Cfunc() {}
};
testclass3<int> yyy;
<span class="quote">> clang test.cpp -c -o test.obj
> nm test.obj</span >
00000000 b .bss
00000000 d .data
00000000 t .text
00000000 t .text$_ZN10testclass25BfuncEv
00000000 t __ZL5Afuncv
00000000 T __ZN10testclass25BfuncEv
00000000 B _xxx
00000001 B _yyy
I expected to see the mangled name of funcC ("__ZN10testclass25CfuncEv") as
well in the object file. Same result with explicit instantiation instead of
using it:
template class testclass3<int>;
The culprit seems to be in CodeGeneratorImpl::HandleTagDeclDefinition(). It
calls Method->doesThisDeclarationHaveABody(), but the body is not instantiated
until the end of the translation unit when Sema::PerformPendingInstantiations()
get called.
Using clang r191953 on Windows 7 targeting i686-pc-mingw32</pre>
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