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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - global functions in anonymous namespace cause runtime cuda error"
href="https://llvm.org/bugs/show_bug.cgi?id=27276">27276</a>
</td>
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<tr>
<th>Summary</th>
<td>global functions in anonymous namespace cause runtime cuda error
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<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>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>CUDA
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>crtrott@sandia.gov
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16185" name="attach_16185" title="Reproducer">attachment 16185</a> <a href="attachment.cgi?id=16185&action=edit" title="Reproducer">[details]</a></span>
Reproducer
When defining a global function in anonymous namespace, it causes a "invalid
device function" error if the function is called from the same compilation
unit.
i.e. in simplified form this doesn't work:
namespace {
__global__ void foo() {}
void bar() {
foo<<<1,1>>>();
}
}
Attached is a reproducer. The output with NVCC is:
////
[crtrott@apollo test_kernel]$ ./a.out
Error PreKernel: no error
Error PostKernel: no error
Error PostSync: no error
Arch: 350
////
The output with clang is:
////
[crtrott@apollo test_kernel]$ ./a.out
Error PreKernel: no error
Error PostKernel: invalid device function
Error PostSync: no error
Arch: 9
////
Compile with ./build_clang after adjusting the paths in the build script.
For a workaround (i.e. remove the namespace) compile with
./build_clang -DWORKAROUND</pre>
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