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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Runtime fails with declare mapper due clang generate extra mapper component for non-array map variable."
href="https://bugs.llvm.org/show_bug.cgi?id=48423">48423</a>
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<th>Summary</th>
<td>Runtime fails with declare mapper due clang generate extra mapper component for non-array map variable.
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>OpenMP
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jennifer.yu@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24242" name="attach_24242" title="Test to reproduce the problem.">attachment 24242</a> <a href="attachment.cgi?id=24242&action=edit" title="Test to reproduce the problem.">[details]</a></span>
Test to reproduce the problem.
Test failed at runtime:
command line to reproduce:
<span class="quote">>clang++ -fopenmp -fopenmp-targets=x86_64-pc-linux-gnu -g -O0 j.cpp</span >
bash-4.4$ ./a.out
Sizeof C = 16 8
Sizeof C.s = 1cf8f808 1cf8f810
Libomptarget message: explicit extension not allowed: host address specified is
0x00007ffe1cf8f808 (16 bytes), but device allocation maps to host at
0x00007ffe1cf8f808 (4 bytes)
Libomptarget error: Call to getOrAllocTgtPtr returned null pointer (device
failure or illegal mapping).
Libomptarget error: Call to targetDataBegin via targetDataMapper for custom
mapper failed.
Libomptarget error: Call to targetDataBegin failed, abort target.
Libomptarget error: Failed to process data before launching the kernel.
Libomptarget error: run with env LIBOMPTARGET_INFO>1 to dump host-target
pointer maps
j.cpp:17:3: Libomptarget fatal error 1: failure of target construct while
offloading is mandatory
Aborted (core dumped)
The problem clang generate 4 Mapper components should be 3:
$11 = std::vector of length 4, capacity 4 = {{Base = 0x7fffffff9f28,
Begin = 0x7fffffff9f28, Size = 16, Type = 32}, {Base = 0x7fffffff9f28,
Begin = 0x7fffffff9f28, Size = 16, Type = 32}, {Base = 0x7fffffff9f28,
Begin = 0x7fffffff9f28, Size = 4, Type = 562949953421315}, {
Base = 0x7fffffff9f30, Begin = 0x7fffffff9f10, Size = 16,
Type = 562949953421331}}
During run mapper_id(clang generated), isarray gets set true cause extra
MapperComponent is generated.
%omp.arrayinit.isarray = icmp sge i64 %6, 1
In emitUDMapperArrayInitOrDel: following code seems not right.
llvm::Value *IsArray = MapperCGF.Builder.CreateICmpSGE(
Size, MapperCGF.Builder.getInt64(1), "omp.arrayinit.isarray");
“C c” is not same with “C c[1]”; but both Size are 1;
Compiler knows map variable type, should not necessary to generate runtime code
for isarray.</pre>
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