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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang rejects _Atomic compound assignment for pointer arithmetic"
href="https://llvm.org/bugs/show_bug.cgi?id=24761">24761</a>
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</tr>
<tr>
<th>Summary</th>
<td>Clang rejects _Atomic compound assignment for pointer arithmetic
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hstong@ca.ibm.com
</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>In C11 subclause 6.5.16.2 paragraph 1, an atomic pointer to a complete object
type is a valid LHS operand for operator += when the RHS has integer type.
Clang (trunk r247105) rejects.
### SOURCE (<stdin>):
void foo(int *_Atomic p) {
p += 1;
}
### COMPILER INVOCATION:
clang -cc1 -x c -std=c11
### ACTUAL OUTPUT:
<stdin>:2:6: error: invalid operands to binary expression ('_Atomic(int *)' and
'int')
p += 1;
~ ^ ~
1 error generated.
### EXPECTED OUTPUT:
Clean compile.
### COMPILER VERSION INFO (clang -v):
clang version 3.8.0 (trunk)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
InstalledDir: /main_trunk/ubuntu14_leppc/daily/latest/bin
Found candidate GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.2
Found candidate GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.3
Selected GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.3
Candidate multilib: .;@m64
Selected multilib: .;@m64</pre>
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