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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Constexpr array not seen as constexpr"
href="https://bugs.llvm.org/show_bug.cgi?id=44177">44177</a>
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<th>Summary</th>
<td>Constexpr array not seen as constexpr
</td>
</tr>
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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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>OpenCL
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>drohr@jwdt.org
</td>
</tr>
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<th>CC</th>
<td>anastasia.stulova@arm.com, llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22880" name="attach_22880" title="Testcase">attachment 22880</a> <a href="attachment.cgi?id=22880&action=edit" title="Testcase">[details]</a></span>
Testcase
The attached code (which works correctly with standard C++, and also with CUDA)
fails in OpenCL because the constexpr array zSize is not interpreted as
constexpr.
Command to reproduce:
clang++ -cl-std=clc++ -Xclang -finclude-default-header -o test test2.cl
Error message:
test2.cl:54:57: error: constexpr function never produces a constant expression
[-Winvalid-constexpr]
GPU_HOST_DEVICE constexpr GPUArray<float, LayersNumber> InverseZBinSize()
^
test2.cl:57:57: note: subexpression not valid in a constant expression
return GPUArray<float, LayersNumber>{{0.5f * ZBins / (zSize[0]), 0.5f * ZBins
/ (zSize[1]), 0.5f * ZBins / (zSize[2]),</pre>
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