[llvm-bugs] [Bug 50333] New: array shaping not accepted in target update to/from clause

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50333

            Bug ID: 50333
           Summary: array shaping not accepted in target update to/from
                    clause
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: OpenMP
          Assignee: unassignedclangbugs at nondot.org
          Reporter: michael.p.rice at intel.com
                CC: llvm-bugs at lists.llvm.org

The array_shaping.1.c example from
https://www.openmp.org/wp-content/uploads/openmp-examples-5-0-1.pdf (p. 50)
does not compile with clang. 

This seems to be explicitly allowed in page 208, line 15 of the 5.1
specification. 


void array_shaping(double *a, int nx, int ny)
{
   // map data to device and do work
   #pragma omp target data map(a[0:nx*(ny+2)])
   {
      #pragma omp target update from( (([nx][ny+2])a)[0:nx][1], \
                                      (([nx][ny+2])a)[0:nx][ny] )

   }
}

$ clang -c -fopenmp t.c
t.c:6:39: error: OpenMP array shaping operation is not allowed here
      #pragma omp target update from( (([nx][ny+2])a)[0:nx][1], \
                                      ^

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