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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Global blocks don’t have a signature (the BLOCK_HAS_SIGNATURE flag is not set)"
href="http://llvm.org/bugs/show_bug.cgi?id=15159">15159</a>
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<th>Summary</th>
<td>Global blocks don’t have a signature (the BLOCK_HAS_SIGNATURE flag is not set)
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>MacOS X
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>LLVM Codegen
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dd2284@gmail.com
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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>When inspecting blocks in a project built with the latest version of Xcode (4.6
which has the following version of clang: 425.0.24 (based on LLVM 3.2svn), I
realized that global blocks do not have a signature in the descriptor member
and indeed the BLOCK_HAS_SIGNATURE flag is not set.
A quick look through CGBlocks.cpp does seem to intend that global block are
emitted with a signature given that the buildGlobalBlock function sets the
flag:
BlockFlags flags = BLOCK_IS_GLOBAL | BLOCK_HAS_SIGNATURE;
However, it doesn’t seem to happen in practice. Is there something I am
misinterpreting or is it actually intended behaviour? I feel two blocks ought
to be inspectable in the same way, disregarding their actual type.</pre>
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