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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 - declare target pointer cannot be accessed in target region"
href="https://bugs.llvm.org/show_bug.cgi?id=46012">46012</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>declare target pointer cannot be accessed in target region
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Runtime Library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@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>In the following example, a pointer in declare target doesn't get the mapped
address. IBM XL works.
Clang run output:
arr omp_target_is_present 0
arr initial device address (nil)
arr host address 0x13e2f20
arr omp_target_is_present 1
arr device address inside map 0x7f9536800000
device address 0 (nil)
device address 1 (nil)
device address 2 (nil)
arr omp_target_is_present 0
arr final device address (nil)
#include <stdio.h>
#include <stdlib.h>
#include <omp.h>
#pragma omp declare target
int * arr;
void foo(int i)
{
printf("devuce address %d %p\n", i, arr);
}
#pragma omp end declare target
int main(void)
{
// Allocate array and set to zero
int len = 3;
arr = (int *) calloc( len, sizeof(int) );
printf("arr omp_target_is_present %d\n", omp_target_is_present(arr, 0));
#pragma omp target data use_device_ptr(arr)
{
printf("arr initial device address %p\n", arr);
}
#pragma omp target data map(tofrom: arr[:len])
{
printf("arr host address %p\n", arr);
printf("arr omp_target_is_present %d\n", omp_target_is_present(arr, 0));
#pragma omp target data use_device_ptr(arr)
{
printf("arr device address inside map %p\n", arr);
}
#pragma omp target teams distribute parallel for
for( int i = 0; i < len; i++)
foo(i);
}
printf("arr omp_target_is_present %d\n", omp_target_is_present(arr, 0));
#pragma omp target data use_device_ptr(arr)
{
printf("arr final device address %p\n", arr);
}
return 0;
}</pre>
</div>
</p>
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