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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Attribute 'noderef' fails to warn in some cases"
href="https://bugs.llvm.org/show_bug.cgi?id=42568">42568</a>
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<th>Summary</th>
<td>Attribute 'noderef' fails to warn in some cases
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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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>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>paul_robinson@playstation.sony.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>C:\TMP>type test.c
struct S {
int x;
};
struct S __attribute__((noderef)) *s;
void bar() {
struct S *p = s; // warned
int *q = &s->x; // not warned
int *r = &(*s).x; // not warned
}
C:\TMP>clang -c test.c
test.c:8:17: warning: casting to dereferenceable pointer removes 'noderef'
attribute [-Wnoderef]
struct S *p = s; // warned
^
1 warning generated.</pre>
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