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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Error when mapping a structure and a contained array section"
href="https://bugs.llvm.org/show_bug.cgi?id=38825">38825</a>
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<tr>
<th>Summary</th>
<td>Error when mapping a structure and a contained array section
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Clang Compiler Support
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hahnjo@hahnjo.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20838" name="attach_20838" title="Example code">attachment 20838</a> <a href="attachment.cgi?id=20838&action=edit" title="Example code">[details]</a></span>
Example code
I may be wrong here with my interpretation of the standard. If so, feel free to
close as INVALID.
$ cat structure-pointer.c
#include <stdlib.h>
typedef struct {
int *ptr;
int val;
} StructWithPtr;
int main(int argc, char *argv[]) {
StructWithPtr s;
s.ptr = malloc(sizeof(int));
s.ptr[0] = 1;
s.val = 2;
#pragma omp target map(s, s.ptr[0:1])
{
s.val++;
s.ptr[0]++;
}
free(s.ptr);
return 0;
}
$ clang -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda structure-pointer.c
structure-pointer.c:14:27: error: variable already marked as mapped in current
construct
#pragma omp target map(s, s.ptr[0:1])
^~~~~~~~~~
structure-pointer.c:14:24: note: used here
#pragma omp target map(s, s.ptr[0:1])
1 error generated.
I can't find a restriction in standards newer than OpenMP 4.5 but I remember
some discussion about patterns like this (StructWithPtr my have many more
members that would clutter the map clause if listed explicitly).
In the light of p309:1-17 I think this should be allowed.</pre>
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