<html>
<head>
<base href="https://llvm.org/bugs/" />
</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 --- - Crash when using registers with a size mismatch"
href="https://llvm.org/bugs/show_bug.cgi?id=30766">30766</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Crash when using registers with a size mismatch
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvm@sjor.sg
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Observe the following (incorrect) code:
void foo() {
register long long f asm("edx") = 0;
asm("" :: "r"(f));
}
When compiled with a 32-bits triplet, this crashes Clang 3.9.0 on my machine:
$ "clang-3.9" "-cc1" "-triple" "i686-unknown-linux" "-emit-obj" "foo.c"
Stack dump:
0. Program arguments: clang-3.9 -cc1 -triple i686-unknown-linux -emit-obj
foo.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'foo.c'.
4. Running pass 'X86 DAG->DAG Instruction Selection' on function '@foo'
[1] 5401 segmentation fault "clang-3.9" "-cc1"</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>