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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [NVPTX] compiling programs with indirect calls (via function pointers)"
href="http://llvm.org/bugs/show_bug.cgi?id=17433">17433</a>
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<th>Summary</th>
<td>[NVPTX] compiling programs with indirect calls (via function pointers)
</td>
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>llc
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>bart.goossens@telin.ugent.be
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11314" name="attach_11314" title="Test program with an indirect call that causes the bug">attachment 11314</a> <a href="attachment.cgi?id=11314&action=edit" title="Test program with an indirect call that causes the bug">[details]</a></span>
Test program with an indirect call that causes the bug
LLC (version 3.3svn, i686-pc-win32) with NVPTX back-end crashes when compiling
an LLVM program containing indirect calls.
>From the error message (see attached example) it seems that the back-end does
not know how to handle function pointers (despite the fact that the CUDA
compiler, NVCC supports them). The example compiles correctly with the x86
back-end, but not when targeting NVPTX.
According to the NVVM specification (see
<a href="http://docs.nvidia.com/cuda/nvvm-ir-spec/index.html">http://docs.nvidia.com/cuda/nvvm-ir-spec/index.html</a>), function pointers are
qualified by address space code addrspace(0) (=default), so not specifying an
address space should be fine. I tried to attach "callalign-metadata" to the
call, as described in the specification, but it did not make any difference.</pre>
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