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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - OpenMP offload reduction on complex type on AMD GPU"
href="https://bugs.llvm.org/show_bug.cgi?id=52108">52108</a>
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<th>Summary</th>
<td>OpenMP offload reduction on complex type on AMD GPU
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<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>OpenMP
</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>
<p>
<div>
<pre><a href="https://github.com/ye-luo/openmp-target/blob/master/tests/complex/complex_reduction.cpp">https://github.com/ye-luo/openmp-target/blob/master/tests/complex/complex_reduction.cpp</a>
# good on nvptx64
clang++ -fopenmp -march=native -fopenmp-targets=nvptx64 -O3 -DNDEBUG
-ffast-math complex_reduction.cpp -lm && ./a.out
# compiler crash on amdgcn
clang++ -fopenmp -march=native -fopenmp-targets=amdgcn-amd-amdhsa
-Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -O3 -DNDEBUG -ffast-math
complex_reduction.cpp -lm
# use openmp-opt-disable, the run goes wrong
clang++ -fopenmp -march=native -fopenmp-targets=amdgcn-amd-amdhsa
-Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -O3 -DNDEBUG -ffast-math -mllvm
-openmp-opt-disable=true complex_reduction.cpp -lm && ./a.out
[GPU Memory Error] Addr: 0x9e8237987000 Reason: Page not present or supervisor
privilege.
Memory access fault by GPU node-1 (Agent handle: 0x18b1150) on address
0x9e8237987000. Reason: Page not present or supervisor privilege.
Aborted (core dumped)
One more related reproducer
llvm-project/openmp/libomptarget/test/offloading/<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - hierarchical parallelism hangs"
href="show_bug.cgi?id=49021">bug49021</a>.cpp
I got wrong results
clang++ -fopenmp -march=native -fopenmp-targets=amdgcn-amd-amdhsa
-Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -O3 -DNDEBUG -ffast-math
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - hierarchical parallelism hangs"
href="show_bug.cgi?id=49021">bug49021</a>.cpp
# use openmp-opt-disable, the run goes wrong
clang++ -fopenmp -march=native -fopenmp-targets=amdgcn-amd-amdhsa
-Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -O3 -DNDEBUG -ffast-math -mllvm
-openmp-opt-disable=true <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - hierarchical parallelism hangs"
href="show_bug.cgi?id=49021">bug49021</a>.cpp
[GPU Memory Error]</pre>
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