<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Demangler produces incorrect output for alignof() and array."
href="https://bugs.llvm.org/show_bug.cgi?id=35651">35651</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Demangler produces incorrect output for alignof() and array.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huangs@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Please run the following:
llvm-cxxfilt _Z3fooDTatA123_3barE
The result:
foo(decltype(alignof (bar [123]) [123]))
The extra "[123]" at end seems wrong. Note that replacing "at" with "st" yields
correct result:
llvm-cxxfilt _Z3fooDTstA123_3barE
=>
foo(decltype(sizeof (bar [123]))
This behavior is caused by code in 2 places (see ItaniumDemangle.cpp)
(1) In struct string_pair: We have
StrT move_full() { return std::move(first) + std::move(second); }
this actually does not clear |first| and |second|!
(2) Compare parse_sizeof_type_expr() with parse_alignof_type(): The former has
db.names.back() = "sizeof (" + db.names.back().move_full() + ")
but the latter has
db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
Therefore "st" (sizeof) overwrites |second| whereas "at" (alignof) keeps
stale |second|.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>