libgomp – fix handling of 'target enter data'

	* target.c (GOMP_target_enter_exit_data): Handle PSET/MAP_POINTER.
	* testsuite/libgomp.fortran/target-enter-data-1.f90: New.

libgomp/ChangeLog

+2020-03-31  Tobias Burnus  <tobias@codesourcery.com>
+
+	* target.c (GOMP_target_enter_exit_data): Handle PSET/MAP_POINTER.
+	* testsuite/libgomp.fortran/target-enter-data-1.f90: New.
+
 2020-03-24  Tobias Burnus  <tobias@codesourcery.com>
 
 	PR libgomp/81689

libgomp/target.c

@@ -2480,7 +2480,9 @@ GOMP_target_enter_exit_data (int device, size_t mapnum, void **hostaddrs,
 	}
     }
 
-  size_t i;
+  /* The variables are mapped separately such that they can be released
+     independently.  */
+  size_t i, j;
   if ((flags & GOMP_TARGET_FLAG_EXIT_DATA) == 0)
     for (i = 0; i < mapnum; i++)
       if ((kinds[i] & 0xff) == GOMP_MAP_STRUCT)
@@ -2489,6 +2491,15 @@ GOMP_target_enter_exit_data (int device, size_t mapnum, void **hostaddrs,
 			 &kinds[i], true, GOMP_MAP_VARS_ENTER_DATA);
 	  i += sizes[i];
 	}
+      else if ((kinds[i] & 0xff) == GOMP_MAP_TO_PSET)
+	{
+	  for (j = i + 1; j < mapnum; j++)
+	    if (!GOMP_MAP_POINTER_P (get_kind (true, kinds, j) & 0xff))
+	      break;
+	  gomp_map_vars (devicep, j-i, &hostaddrs[i], NULL, &sizes[i],
+			 &kinds[i], true, GOMP_MAP_VARS_ENTER_DATA);
+	  i += j - i - 1;
+	}
       else
 	gomp_map_vars (devicep, 1, &hostaddrs[i], NULL, &sizes[i], &kinds[i],
 		       true, GOMP_MAP_VARS_ENTER_DATA);

libgomp/testsuite/libgomp.fortran/target-enter-data-1.f90

+program main
+  implicit none
+  integer, allocatable, dimension(:) :: AA, BB, CC, DD
+  integer :: i, N = 20
+
+  allocate(BB(N))
+  AA = [(i, i=1,N)]
+
+  !$omp target enter data map(alloc: BB)
+  !$omp target enter data map(to: AA)
+
+  !$omp target
+    BB = 3 * AA
+  !$omp end target
+
+  !$omp target exit data map(delete: AA)
+  !$omp target exit data map(from: BB)
+
+  if (any (BB /= [(3*i, i=1,N)])) stop 1
+  if (any (AA /= [(i, i=1,N)])) stop 2
+
+
+  CC = 31 * BB
+  DD = [(-i, i=1,N)]
+
+  !$omp target enter data map(to: CC) map(alloc: DD)
+
+  !$omp target
+    DD = 5 * CC
+  !$omp end target
+
+  !$omp target exit data map(delete: CC) map(from: DD)
+
+  if (any (CC /= [(31*3*i, i=1,N)])) stop 3
+  if (any (DD /= [(31*3*5*i, i=1,N)])) stop 4
+end