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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ext_vector_type is not compatible with constexpr"
href="http://llvm.org/bugs/show_bug.cgi?id=20157">20157</a>
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<th>Summary</th>
<td>ext_vector_type is not compatible with constexpr
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>chris.a.ferguson@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>It seems many uses of a type based on ext_vector_type are not suitable for use
in a constexpr, for example:
typedef float __attribute__((ext_vector_type(4))) float4;
constexpr float4 MultiplyByTwo(float4 x)
{
return x * 2.0f;
}
main.cpp:3:18: error: constexpr function never produces a constant expression
[-Winvalid-constexpr]
constexpr float4 MultiplyByTwo(float4 x)
^
main.cpp:5:12: note: subexpression not valid in a constant expression
return x * 2.0f;
^
1 error generated.</pre>
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