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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang crashes during CodeGen if _GUID is incomplete"
href="http://llvm.org/bugs/show_bug.cgi?id=16856">16856</a>
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<th>Summary</th>
<td>clang crashes during CodeGen if _GUID is incomplete
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</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
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>david.majnemer@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>consider the following program:
struct __declspec(uuid("{12345678-1234-1234-1234-1234567890aB}")) uuid;
const struct _GUID *G = &__uuidof(uuid);
We will crash in clang::CodeGen::CodeGenModule::EmitUuidofInitializer because
our attempt to enter clang::CodeGen::CodeGenModule::EmitConstantValue will be
foiled: the type of the constant value is incomplete.
Being more compatible with cl would yield us a "straightforward" result with
the following sequence:
1. struct __s_GUID would be a builtin type with the same layout as struct
_GUID.
2. struct _GUID would be a known incomplete type.
3. The constant would be emitted with type struct __s_GUID.
4. __uuidof would give back a pointer of type struct _GUID.</pre>
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