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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - std::fpclassify missing long double when offload is enabled"
href="https://bugs.llvm.org/show_bug.cgi?id=42799">42799</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>std::fpclassify missing long double when offload is enabled
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Clang Compiler Support
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>xw111luoye@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<div>
<pre>std::fpclassify(long double) when offload is enabled
#include <cmath>
int main()
{
long double a(0);
return (std::fpclassify(a) == 2);
}
clang++ -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda test.cpp
test.cpp:6:11: error: call to 'fpclassify' is ambiguous
return (std::fpclassify(a) == 2);
^~~~~~~~~~~~~~~
/home/yeluo/opt/llvm-clang/mirror-20190727/lib/clang/10.0.0/include/__clang_cuda_math_forward_declares.h:103:16:
note: candidate function
__DEVICE__ int fpclassify(double);
^
/home/yeluo/opt/llvm-clang/mirror-20190727/lib/clang/10.0.0/include/__clang_cuda_math_forward_declares.h:104:16:
note: candidate function
__DEVICE__ int fpclassify(float);
^
1 error generated.
A simple fix is in
lib/Headers/__clang_cuda_math_forward_declares.h
add
+__DEVICE__ int fpclassify(long double);
__DEVICE__ int fpclassify(double);
__DEVICE__ int fpclassify(float);
clang++ -v
clang version 10.0.0 (<a href="https://github.com/llvm-mirror/clang.git">https://github.com/llvm-mirror/clang.git</a>
0345de1b90a4c75cd7e47505bebbbcf46b841940)
(<a href="https://github.com/llvm-mirror/llvm.git">https://github.com/llvm-mirror/llvm.git</a>
c64f519ea0da2c3bf49a4e421c25a82b66230a17)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/yeluo/opt/llvm-clang/mirror-latest/bin
Found candidate GCC installation:
/opt/gcc/6.5.0/lib/gcc/x86_64-pc-linux-gnu/6.5.0
Selected GCC installation: /opt/gcc/6.5.0/lib/gcc/x86_64-pc-linux-gnu/6.5.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
Found CUDA installation: /usr/local/cuda-10.1, version 10.1</pre>
</div>
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