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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DISubprogram treats return type in inconsistent way causing assertion failure in Verify"
href="http://llvm.org/bugs/show_bug.cgi?id=15529">15529</a>
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<th>Summary</th>
<td>DISubprogram treats return type in inconsistent way causing assertion failure in Verify
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<th>Product</th>
<td>libraries
</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
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<th>Status</th>
<td>NEW
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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>Core LLVM classes
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>kai@redstar.de
</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>I try to create debug info for a function which returns an int.
The return type is created via DIBuilder->createBasicType() and the returned
object is passed to DIBuilder->createFunction() as the return type.
I get an assertion failure if I call DISubprogram->Verify() on such constructed
object.
According to the DWARF 3/4 spec my approach is legal. The right value is
returned by DISubprogram->getReturnTypeName() because it is implemented as the
comment specifies:
/// getReturnTypeName - Subprogram return types are encoded either as
/// DIType or as DICompositeType.
But:
- DISubprogram->Verify() fails because it always expects a DICompositeType
- You can't retrieve the return type if it is different from DICompositeType
because DISubprogram->getType() always returns a DICompositeType.
Resolution would be:
(a) always require a DICompositeType for the return type OR
(b) implement getType() and Verify() analog to getReturnTypeName()</pre>
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