Don't allow mixed component and non-component accesses for OpenACC/Fortran

gcc/fortran/
	* gfortran.h (gfc_symbol): Add comp_mark bitfield.
	* openmp.c (resolve_omp_clauses): Disallow mixed component and
	full-derived-type accesses to the same variable within a single
	directive.

	libgomp/
	* testsuite/libgomp.oacc-fortran/deep-copy-2.f90: Remove test from here.
	* testsuite/libgomp.oacc-fortran/deep-copy-3.f90: Don't use mixed
	component/non-component variable refs in a single directive.
	* testsuite/libgomp.oacc-fortran/classtypes-1.f95: Likewise.

	gcc/testsuite/
	* gfortran.dg/goacc/deep-copy-2.f90: Move test here (from libgomp
	testsuite). Make a compilation test, and expect rejection of mixed
	component/non-component accesses.
	* gfortran.dg/goacc/mapping-tests-1.f90: New test.

gcc/fortran/ChangeLog

@@ -1,3 +1,10 @@
+2020-01-28  Julian Brown  <julian@codesourcery.com>
+
+	* gfortran.h (gfc_symbol): Add comp_mark bitfield.
+	* openmp.c (resolve_omp_clauses): Disallow mixed component and
+	full-derived-type accesses to the same variable within a single
+	directive.
+
 2020-01-28  Tobias Burnus  <tobias@codesourcery.com>
 
 	PR fortran/93464

gcc/fortran/gfortran.h

@@ -1592,9 +1592,11 @@ typedef struct gfc_symbol
      current statement have the mark member nonzero.  Of these symbols,
      symbols with old_symbol equal to NULL are symbols created within
      the current statement.  Otherwise, old_symbol points to a copy of
-     the old symbol. gfc_new is used in symbol.c to flag new symbols.  */
+     the old symbol. gfc_new is used in symbol.c to flag new symbols.
+     comp_mark is used to indicate variables which have component accesses
+     in OpenMP/OpenACC directive clauses.  */
   struct gfc_symbol *old_symbol;
-  unsigned mark:1, gfc_new:1;
+  unsigned mark:1, comp_mark:1, gfc_new:1;
 
   /* The tlink field is used in the front end to carry the module
      declaration of separate module procedures so that the characteristics

gcc/fortran/openmp.c

@@ -4248,6 +4248,7 @@ resolve_omp_clauses (gfc_code *code, gfc_omp_clauses *omp_clauses,
     for (n = omp_clauses->lists[list]; n; n = n->next)
       {
 	n->sym->mark = 0;
+	n->sym->comp_mark = 0;
 	if (n->sym->attr.flavor == FL_VARIABLE
 	    || n->sym->attr.proc_pointer
 	    || (!code && (!n->sym->attr.dummy || n->sym->ns != ns)))
@@ -4313,23 +4314,25 @@ resolve_omp_clauses (gfc_code *code, gfc_omp_clauses *omp_clauses,
 	&& (list != OMP_LIST_REDUCTION || !openacc))
       for (n = omp_clauses->lists[list]; n; n = n->next)
 	{
-	  bool array_only_p = true;
-	  /* Disallow duplicate bare variable references and multiple
-	     subarrays of the same array here, but allow multiple components of
-	     the same (e.g. derived-type) variable.  For the latter, duplicate
-	     components are detected elsewhere.  */
-	  if (openacc && n->expr && n->expr->expr_type == EXPR_VARIABLE)
+	  bool component_ref_p = false;
+
+	  /* Allow multiple components of the same (e.g. derived-type)
+	     variable here.  Duplicate components are detected elsewhere.  */
+	  if (n->expr && n->expr->expr_type == EXPR_VARIABLE)
 	    for (gfc_ref *ref = n->expr->ref; ref; ref = ref->next)
-	      if (ref->type != REF_ARRAY)
-		{
-		  array_only_p = false;
-		  break;
-		}
-	  if (array_only_p)
+	      if (ref->type == REF_COMPONENT)
+		component_ref_p = true;
+	  if ((!component_ref_p && n->sym->comp_mark)
+	      || (component_ref_p && n->sym->mark))
+	    gfc_error ("Symbol %qs has mixed component and non-component "
+		       "accesses at %L", n->sym->name, &n->where);
+	  else if (n->sym->mark)
+	    gfc_error ("Symbol %qs present on multiple clauses at %L",
+		       n->sym->name, &n->where);
+	  else
 	    {
-	      if (n->sym->mark)
-		gfc_error ("Symbol %qs present on multiple clauses at %L",
-			   n->sym->name, &n->where);
+	      if (component_ref_p)
+		n->sym->comp_mark = 1;
 	      else
 		n->sym->mark = 1;
 	    }

gcc/testsuite/ChangeLog

@@ -1,3 +1,10 @@
+2020-01-28  Julian Brown  <julian@codesourcery.com>
+
+	* gfortran.dg/goacc/deep-copy-2.f90: Move test here (from libgomp
+	testsuite). Make a compilation test, and expect rejection of mixed
+	component/non-component accesses.
+	* gfortran.dg/goacc/mapping-tests-1.f90: New test.
+
 2020-01-28  Tobias Burnus  <tobias@codesourcery.com>
 	    Julian Brown  <julian@codesourcery.com>
 

gcc/testsuite/gfortran.dg/goacc/deep-copy-2.f90

@@ -1,4 +1,4 @@
-! { dg-do run }
+! { dg-do compile }
 
 ! Test of attach/detach with "acc data", two clauses at once.
 
@@ -14,7 +14,9 @@ program dtype
 
   allocate(var%a(1:n))
 
-!$acc data copy(var) copy(var%a)
+!$acc data copy(var) copy(var%a) ! { dg-error "Symbol .var. has mixed component and non-component accesses" }
+
+!$acc data copy(var%a) copy(var) ! { dg-error "Symbol .var. has mixed component and non-component accesses" }
 
 !$acc parallel loop
   do i = 1,n
@@ -22,6 +24,8 @@ program dtype
   end do
 !$acc end parallel loop
 
+!$acc end data
+
 !$acc end data
 
   do i = 1,n

gcc/testsuite/gfortran.dg/goacc/mapping-tests-1.f90

@@ -0,0 +1,15 @@
+! { dg-do compile }
+
+subroutine foo
+  type t
+    integer :: i, j
+  end type t
+
+  type(t) x
+
+  ! We should reject the duplicate reference here.
+!$acc enter data copyin(x%i, x%i)
+! { dg-error ".x.i. appears more than once in map clauses" "" { target "*-*-*" } 11 }
+
+
+end

libgomp/ChangeLog

@@ -1,3 +1,10 @@
+2020-01-28  Julian Brown  <julian@codesourcery.com>
+
+	* testsuite/libgomp.oacc-fortran/deep-copy-2.f90: Remove test from here.
+	* testsuite/libgomp.oacc-fortran/deep-copy-3.f90: Don't use mixed
+	component/non-component variable refs in a single directive.
+	* testsuite/libgomp.oacc-fortran/classtypes-1.f95: Likewise.
+
 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
 
 	* configure.ac: Handle `--with-toolexeclibdir='.

libgomp/testsuite/libgomp.oacc-fortran/classtypes-1.f95

@@ -31,7 +31,8 @@ program main
     myvar%p%p(i) = -1.0
   end do
 
-!$acc enter data copyin(myvar, myvar%p) create(myvar%p%p)
+!$acc enter data copyin(myvar)
+!$acc enter data copyin(myvar%p) create(myvar%p%p)
 
 !$acc parallel loop present(myvar%p%p)
   do i=1,100
@@ -39,7 +40,8 @@ program main
   end do
 !$acc end parallel loop
 
-!$acc exit data copyout(myvar%p%p) delete(myvar, myvar%p)
+!$acc exit data copyout(myvar%p%p) delete(myvar%p)
+!$acc exit data delete(myvar)
 
   do i=1,100
     if (myvar%p%p(i) .ne. i * 2) stop 1

libgomp/testsuite/libgomp.oacc-fortran/deep-copy-3.f90

@@ -16,12 +16,14 @@ program dtype
   allocate(var%a(1:n))
   allocate(var%b(1:n))
 
-!$acc parallel loop copy(var) copy(var%a(1:n)) copy(var%b(1:n))
+!$acc data copy(var)
+!$acc parallel loop copy(var%a(1:n)) copy(var%b(1:n))
   do i = 1,n
     var%a(i) = i
     var%b(i) = i
   end do
 !$acc end parallel loop
+!$acc end data
 
   do i = 1,n
     if (i .ne. var%a(i)) stop 1