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<base href="http://bugzilla.gdcproject.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - GDC unable to de-virtualise method calls"
href="http://bugzilla.gdcproject.org/show_bug.cgi?id=162">162</a>
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<th>Summary</th>
<td>GDC unable to de-virtualise method calls
</td>
</tr>
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<th>Product</th>
<td>GDC
</td>
</tr>
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<th>Version</th>
<td>development
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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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>Normal
</td>
</tr>
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<th>Component</th>
<td>gdc
</td>
</tr>
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<th>Assignee</th>
<td>ibuclaw@gdcproject.org
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<th>Reporter</th>
<td>ibuclaw@gdcproject.org
</td>
</tr></table>
<p>
<div>
<pre>Currently we emit method calls as the following:
*(c->__vptr + 40) (c, 1, 2, 3);
Which translate directly into the following trees:
indirect_ref(pointer_plus(component_ref(c, __vptr), 40))
GCC provides a more simplistic tree code called obj_type_ref, which represents
a virtual method lookup, and given the binfo structure we already pass to the
backed, this would give a chance for the optimiser passes to statically
determine the dynamic type of the object and devirtualise the call.
obj_type_ref(component_ref(c, __vptr), c, 40)</pre>
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