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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Invalid warning about unsupported target("thumb") attribute"
href="https://bugs.llvm.org/show_bug.cgi?id=34491">34491</a>
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<th>Summary</th>
<td>Invalid warning about unsupported target("thumb") attribute
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eugeni.stepanov@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Any use of ARM-specific target attributes, like the following:
__attribute__((target("arm")))
unsigned long f_arm() {
return 3;
}
generates incorrect warnings like these:
warning: ignoring unsupported 'arm' in the target attribute string
[-Wignored-attributes]
__attribute__((target("arm")))
warning: ignoring unsupported 'thumb' in the target attribute string
[-Wignored-attributes]
__attribute__((target("thumb")))
while, in fact, the attribute in NOT ignored and has the desired effect.
This comes from TargetInfo::isValidFeatureName(), which simply returns false
for ARM.</pre>
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</p>
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