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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - sinh vs asinh vs constexpr"
href="https://bugs.llvm.org/show_bug.cgi?id=37848">37848</a>
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<th>Summary</th>
<td>sinh vs asinh vs constexpr
</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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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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>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>zhonghao@pku.org.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The code is as follow:
namespace std {
constexpr double asinh (double x) { return __builtin_asinh (x); }
}
int main()
{
constexpr double das = std::asinh(1.0);
}
clang++ produces errors:
error: constexpr function never produces a constant expression
[-Winvalid-constexpr]
constexpr double asinh (double x) { return __builtin_asinh (x); }
note: subexpression not valid in a constant expression
constexpr double asinh (double x) { return __builtin_asinh (x); }
error: constexpr variable 'das' must be initialized by a constant expression
constexpr double das = std::asinh(1.0);
g++ accepts the above code. The code comes from a gcc bug report:
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49813">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49813</a>
The report has a long discussion on this issue. Please check the report. It
seems to be a bug in clang++.</pre>
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