trans-array.h (gfc_deallocate_alloc_comp_no_caf, [...]): New prototype.

2013-07-15  Tobias Burnus  <burnus@net-b.de>

        * trans-array.h (gfc_deallocate_alloc_comp_no_caf,
        gfc_reassign_alloc_comp_caf): New prototype.
        * trans-array.c (enum): Add DEALLOCATE_ALLOC_COMP_NO_CAF
        and COPY_ALLOC_COMP_CAF.
        (structure_alloc_comps): Handle it.
        (gfc_reassign_alloc_comp_caf,
        gfc_deallocate_alloc_comp_no_caf): New function.
        (gfc_alloc_allocatable_for_assignment): Call it.
        * trans-expr.c (gfc_trans_scalar_assign,
        gfc_trans_arrayfunc_assign, gfc_trans_assignment_1): Ditto.
        * parse.c (parse_derived): Correctly set coarray_comp.
        * resolve.c (resolve_symbol): Improve error wording.

2013-07-15  Tobias Burnus  <burnus@net-b.de>

        * gfortran.dg/coarray_lib_realloc_1.f90: New.
        * gfortran.dg/coarray/lib_realloc_1.f90: New.
        * gfortran.dg/coarray_6.f90: Add dg-error.

From-SVN: r200955

gcc/fortran/ChangeLog

 2013-07-15  Tobias Burnus  <burnus@net-b.de>
 
+	* trans-array.h (gfc_deallocate_alloc_comp_no_caf,
+	gfc_reassign_alloc_comp_caf): New prototype.
+	* trans-array.c (enum): Add DEALLOCATE_ALLOC_COMP_NO_CAF
+	and COPY_ALLOC_COMP_CAF.
+	(structure_alloc_comps): Handle it.
+	(gfc_reassign_alloc_comp_caf,
+	gfc_deallocate_alloc_comp_no_caf): New function.
+	(gfc_alloc_allocatable_for_assignment): Call it.
+	* trans-expr.c (gfc_trans_scalar_assign,
+	gfc_trans_arrayfunc_assign, gfc_trans_assignment_1): Ditto.
+	* parse.c (parse_derived): Correctly set coarray_comp.
+	* resolve.c (resolve_symbol): Improve error wording.
+
+2013-07-15  Tobias Burnus  <burnus@net-b.de>
+
 	PR fortran/37336
 	* trans.c (gfc_add_comp_finalizer_call): New function.
 	* trans.h (gfc_add_comp_finalizer_call): New prototype.

gcc/fortran/parse.c

@@ -2228,11 +2228,11 @@ endType:
 	  sym->attr.coarray_comp = 1;
 	}
      
-      if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.coarray_comp)
+      if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.coarray_comp
+	  && !c->attr.pointer)
 	{
 	  coarray = true;
-	  if (!pointer && !allocatable)
-	    sym->attr.coarray_comp = 1;
+	  sym->attr.coarray_comp = 1;
 	}
 
       /* Looking for lock_type components.  */

gcc/fortran/resolve.c

@@ -13125,8 +13125,8 @@ resolve_symbol (gfc_symbol *sym)
       && (class_attr.codimension || class_attr.pointer || class_attr.dimension
 	  || class_attr.allocatable))
     {
-      gfc_error ("Variable '%s' at %L with coarray component "
-		 "shall be a nonpointer, nonallocatable scalar",
+      gfc_error ("Variable '%s' at %L with coarray component shall be a "
+		 "nonpointer, nonallocatable scalar, which is not a coarray",
 		 sym->name, &sym->declared_at);
       return;
     }

gcc/fortran/trans-array.c

@@ -7445,8 +7445,9 @@ gfc_copy_allocatable_data (tree dest, tree src, tree type, int rank)
    deallocate, nullify or copy allocatable components.  This is the work horse
    function for the functions named in this enum.  */
 
-enum {DEALLOCATE_ALLOC_COMP = 1, NULLIFY_ALLOC_COMP, COPY_ALLOC_COMP,
-      COPY_ONLY_ALLOC_COMP};
+enum {DEALLOCATE_ALLOC_COMP = 1, DEALLOCATE_ALLOC_COMP_NO_CAF,
+      NULLIFY_ALLOC_COMP, COPY_ALLOC_COMP, COPY_ONLY_ALLOC_COMP,
+      COPY_ALLOC_COMP_CAF};
 
 static tree
 structure_alloc_comps (gfc_symbol * der_type, tree decl,
@@ -7577,6 +7578,7 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
       switch (purpose)
 	{
 	case DEALLOCATE_ALLOC_COMP:
+	case DEALLOCATE_ALLOC_COMP_NO_CAF:
 
 	  /* gfc_deallocate_scalar_with_status calls gfc_deallocate_alloc_comp
 	     (i.e. this function) so generate all the calls and suppress the
@@ -7586,19 +7588,22 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 
 	  if ((c->ts.type == BT_DERIVED && !c->attr.pointer)
 	      || (c->ts.type == BT_CLASS && !CLASS_DATA (c)->attr.class_pointer))
-	    {
-	      comp = fold_build3_loc (input_location, COMPONENT_REF, ctype,
-				      decl, cdecl, NULL_TREE);
+ 	    {
+ 	      comp = fold_build3_loc (input_location, COMPONENT_REF, ctype,
+ 				      decl, cdecl, NULL_TREE);
 
 	      /* The finalizer frees allocatable components.  */
 	      called_dealloc_with_status
-		= gfc_add_comp_finalizer_call (&tmpblock, comp, c, true);
+		= gfc_add_comp_finalizer_call (&tmpblock, comp, c,
+					       purpose == DEALLOCATE_ALLOC_COMP);
 	    }
 	  else
 	    comp = NULL_TREE;
 
-	  if (c->attr.allocatable && (c->attr.dimension || c->attr.codimension)
-	      && !c->attr.proc_pointer)
+	  if (c->attr.allocatable && !c->attr.proc_pointer
+	      && (c->attr.dimension
+		  || (c->attr.codimension
+		      && purpose != DEALLOCATE_ALLOC_COMP_NO_CAF)))
 	    {
 	      if (comp == NULL_TREE)
 		comp = fold_build3_loc (input_location, COMPONENT_REF, ctype,
@@ -7606,7 +7611,7 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 	      tmp = gfc_trans_dealloc_allocated (comp, c->attr.codimension, NULL);
 	      gfc_add_expr_to_block (&tmpblock, tmp);
 	    }
-	  else if (c->attr.allocatable)
+	  else if (c->attr.allocatable && !c->attr.codimension)
 	    {
 	      /* Allocatable scalar components.  */
 	      if (comp == NULL_TREE)
@@ -7623,14 +7628,13 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 				     build_int_cst (TREE_TYPE (comp), 0));
 	      gfc_add_expr_to_block (&tmpblock, tmp);
 	    }
-	  else if (c->ts.type == BT_CLASS && CLASS_DATA (c)->attr.allocatable)
+	  else if (c->ts.type == BT_CLASS && CLASS_DATA (c)->attr.allocatable
+		   && (!CLASS_DATA (c)->attr.codimension
+		       || purpose != DEALLOCATE_ALLOC_COMP_NO_CAF))
 	    {
 	      /* Allocatable CLASS components.  */
 
 	      /* Add reference to '_data' component.  */
-	      if (comp == NULL_TREE)
-		comp = fold_build3_loc (input_location, COMPONENT_REF, ctype,
-					decl, cdecl, NULL_TREE);
 	      tmp = CLASS_DATA (c)->backend_decl;
 	      comp = fold_build3_loc (input_location, COMPONENT_REF,
 				      TREE_TYPE (tmp), comp, tmp, NULL_TREE);
@@ -7721,6 +7725,28 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 	    }
 	  break;
 
+	case COPY_ALLOC_COMP_CAF:
+	  if (!c->attr.codimension
+	      && (c->ts.type != BT_CLASS || CLASS_DATA (c)->attr.coarray_comp)
+	      && (c->ts.type != BT_DERIVED
+		  || !c->ts.u.derived->attr.coarray_comp))
+	    continue;
+
+	  comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, decl,
+				  cdecl, NULL_TREE);
+	  dcmp = fold_build3_loc (input_location, COMPONENT_REF, ctype, dest,
+				  cdecl, NULL_TREE);
+	  if (c->attr.codimension)
+	    gfc_add_modify (&fnblock, dcmp, comp);
+	  else
+	    {
+	      tmp = structure_alloc_comps (c->ts.u.derived, comp, dcmp,
+					   rank, purpose);
+	      gfc_add_expr_to_block (&fnblock, tmp);
+
+	    }
+	  break;
+
 	case COPY_ALLOC_COMP:
 	  if (c->attr.pointer)
 	    continue;
@@ -7752,18 +7778,30 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 					  size_type_node, size,
 					  fold_convert (size_type_node,
 							nelems));
-		  src_data = gfc_conv_descriptor_data_get (src_data);
-		  dst_data = gfc_conv_descriptor_data_get (dst_data);
 		}
 	      else
 		nelems = build_int_cst (size_type_node, 1);
 
+	      if (CLASS_DATA (c)->attr.dimension
+		  || CLASS_DATA (c)->attr.codimension)
+		{
+		  src_data = gfc_conv_descriptor_data_get (src_data);
+		  dst_data = gfc_conv_descriptor_data_get (dst_data);
+		}
+
 	      gfc_init_block (&tmpblock);
 
-	      ftn_tree = builtin_decl_explicit (BUILT_IN_MALLOC);
-	      tmp = build_call_expr_loc (input_location, ftn_tree, 1, size);
-	      gfc_add_modify (&tmpblock, dst_data,
-			      fold_convert (TREE_TYPE (dst_data), tmp));
+	      /* Coarray component have to have the same allocation status and
+		 shape/type-parameter/effective-type on the LHS and RHS of an
+		 intrinsic assignment. Hence, we did not deallocated them - and
+		 do not allocate them here.  */
+	      if (!CLASS_DATA (c)->attr.codimension)
+		{
+		  ftn_tree = builtin_decl_explicit (BUILT_IN_MALLOC);
+		  tmp = build_call_expr_loc (input_location, ftn_tree, 1, size);
+		  gfc_add_modify (&tmpblock, dst_data,
+				  fold_convert (TREE_TYPE (dst_data), tmp));
+		}
 
 	      tmp = gfc_copy_class_to_class (comp, dcmp, nelems);
 	      gfc_add_expr_to_block (&tmpblock, tmp);
@@ -7788,7 +7826,10 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 	      && !cmp_has_alloc_comps)
 	    {
 	      rank = c->as ? c->as->rank : 0;
-	      tmp = gfc_duplicate_allocatable (dcmp, comp, ctype, rank);
+	      if (c->attr.codimension)
+		tmp = gfc_copy_allocatable_data (dcmp, comp, ctype, rank);
+	      else
+		tmp = gfc_duplicate_allocatable (dcmp, comp, ctype, rank);
 	      gfc_add_expr_to_block (&fnblock, tmp);
 	    }
 
@@ -7835,6 +7876,26 @@ gfc_deallocate_alloc_comp (gfc_symbol * der_type, tree decl, int rank)
 
 
 /* Recursively traverse an object of derived type, generating code to
+   deallocate allocatable components.  But do not deallocate coarrays.
+   To be used for intrinsic assignment, which may not change the allocation
+   status of coarrays.  */
+
+tree
+gfc_deallocate_alloc_comp_no_caf (gfc_symbol * der_type, tree decl, int rank)
+{
+  return structure_alloc_comps (der_type, decl, NULL_TREE, rank,
+				DEALLOCATE_ALLOC_COMP_NO_CAF);
+}
+
+
+tree
+gfc_reassign_alloc_comp_caf (gfc_symbol *der_type, tree decl, tree dest)
+{
+  return structure_alloc_comps (der_type, decl, dest, 0, COPY_ALLOC_COMP_CAF);
+}
+
+
+/* Recursively traverse an object of derived type, generating code to
    copy it and its allocatable components.  */
 
 tree
@@ -8267,8 +8328,8 @@ gfc_alloc_allocatable_for_assignment (gfc_loopinfo *loop,
   if ((expr1->ts.type == BT_DERIVED)
 	&& expr1->ts.u.derived->attr.alloc_comp)
     {
-      tmp = gfc_deallocate_alloc_comp (expr1->ts.u.derived, old_desc,
-				       expr1->rank);
+      tmp = gfc_deallocate_alloc_comp_no_caf (expr1->ts.u.derived, old_desc,
+					      expr1->rank);
       gfc_add_expr_to_block (&realloc_block, tmp);
     }
 

gcc/fortran/trans-array.h

@@ -51,6 +51,8 @@ tree gfc_copy_allocatable_data (tree dest, tree src, tree type, int rank);
 tree gfc_nullify_alloc_comp (gfc_symbol *, tree, int);
 
 tree gfc_deallocate_alloc_comp (gfc_symbol *, tree, int);
+tree gfc_deallocate_alloc_comp_no_caf (gfc_symbol *, tree, int);
+tree gfc_reassign_alloc_comp_caf (gfc_symbol *, tree, tree);
 
 tree gfc_copy_alloc_comp (gfc_symbol *, tree, tree, int);
 

gcc/fortran/trans-expr.c

@@ -6824,6 +6824,7 @@ gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts,
     }
   else if (ts.type == BT_DERIVED && ts.u.derived->attr.alloc_comp)
     {
+      tree tmp_var = NULL_TREE;
       cond = NULL_TREE;
 
       /* Are the rhs and the lhs the same?  */
@@ -6841,8 +6842,8 @@ gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts,
 	 expression.  */
       if (!l_is_temp && dealloc)
 	{
-	  tmp = gfc_evaluate_now (lse->expr, &lse->pre);
-	  tmp = gfc_deallocate_alloc_comp (ts.u.derived, tmp, 0);
+	  tmp_var = gfc_evaluate_now (lse->expr, &lse->pre);
+	  tmp = gfc_deallocate_alloc_comp_no_caf (ts.u.derived, tmp_var, 0);
 	  if (deep_copy)
 	    tmp = build3_v (COND_EXPR, cond, build_empty_stmt (input_location),
 			    tmp);
@@ -6855,6 +6856,16 @@ gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts,
       gfc_add_modify (&block, lse->expr,
 			   fold_convert (TREE_TYPE (lse->expr), rse->expr));
 
+      /* Restore pointer address of coarray components.  */
+      if (ts.u.derived->attr.coarray_comp && deep_copy)
+	{
+	  gcc_assert (tmp_var != NULL_TREE);
+	  tmp = gfc_reassign_alloc_comp_caf (ts.u.derived, tmp_var, lse->expr);
+	  tmp = build3_v (COND_EXPR, cond, build_empty_stmt (input_location),
+			  tmp);
+	  gfc_add_expr_to_block (&block, tmp);
+	}
+
       /* Do a deep copy if the rhs is a variable, if it is not the
 	 same as the lhs.  */
       if (deep_copy)
@@ -7196,8 +7207,8 @@ gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2)
 	&& expr1->ts.u.derived->attr.alloc_comp)
     {
       tree tmp;
-      tmp = gfc_deallocate_alloc_comp (expr1->ts.u.derived, se.expr,
-				       expr1->rank);
+      tmp = gfc_deallocate_alloc_comp_no_caf (expr1->ts.u.derived, se.expr,
+					      expr1->rank);
       gfc_add_expr_to_block (&se.pre, tmp);
     }
 
@@ -7762,7 +7773,7 @@ gfc_trans_assignment_1 (gfc_expr * expr1, gfc_expr * expr2, bool init_flag,
 		       && expr1->rank && !expr2->rank);
   if (scalar_to_array && dealloc)
     {
-      tmp = gfc_deallocate_alloc_comp (expr2->ts.u.derived, rse.expr, 0);
+      tmp = gfc_deallocate_alloc_comp_no_caf (expr2->ts.u.derived, rse.expr, 0);
       gfc_add_expr_to_block (&loop.post, tmp);
     }
 

gcc/testsuite/ChangeLog

 2013-07-15  Tobias Burnus  <burnus@net-b.de>
 
+	* gfortran.dg/coarray_lib_realloc_1.f90: New.
+	* gfortran.dg/coarray/lib_realloc_1.f90: New.
+	* gfortran.dg/coarray_6.f90: Add dg-error.
+
+2013-07-15  Tobias Burnus  <burnus@net-b.de>
+
 	PR fortran/37336
 	* gfortran.dg/finalize_18.f90: New.
 

gcc/testsuite/gfortran.dg/coarray/lib_realloc_1.f90

+! { dg-do run }
+! { dg-options "-O0" }
+!
+! Test that for CAF components _gfortran_caf_deregister is called
+! Test that norealloc happens for CAF components during assignment
+!
+module m
+type t
+  integer, allocatable :: CAF[:]
+end type t
+end module m
+
+program main
+use m
+type(t), target :: x,y
+integer, pointer :: ptr
+allocate(x%caf[*], y%caf[*])
+ptr => y%caf
+ptr = 6
+if (.not.allocated(x%caf)) call abort()
+if (.not.allocated(y%caf)) call abort()
+if (y%caf /= 6) call abort ()
+x = y
+if (x%caf /= 6) call abort ()
+if (.not. associated (ptr,y%caf)) call abort()
+if (associated (ptr,x%caf)) call abort()
+ptr = 123
+if (y%caf /= 123) call abort ()
+if (x%caf /= 6) call abort ()
+end program main

gcc/testsuite/gfortran.dg/coarray_6.f90

@@ -75,7 +75,7 @@ subroutine valid(a)
   type t2
     type(t) :: b
   end type t2
-  type(t2), save :: xt2[*]
+  type(t2), save :: xt2[*] ! { dg-error "nonpointer, nonallocatable scalar, which is not a coarray" }
 end subroutine valid
 
 program main

gcc/testsuite/gfortran.dg/coarray_lib_realloc_1.f90

+! { dg-do compile }
+! { dg-options "-fdump-tree-original -fcoarray=lib" }
+!
+! PR fortran/52052
+!
+! Test that for CAF components _gfortran_caf_deregister is called
+! Test that norealloc happens for CAF components during assignment
+!
+module m
+type t
+  integer, allocatable :: CAF[:]
+  integer, allocatable :: ii
+end type t
+end module m
+
+subroutine foo()
+use m
+type(t) :: x,y
+if (allocated(x%caf)) call abort()
+x = y
+end
+
+! For comp%ii: End of scope of x + y (2x) and for the LHS of the assignment (1x)
+! { dg-final { scan-tree-dump-times "__builtin_free" 3 "original" } }
+
+! For comp%CAF:  End of scope of x + y (2x); no LHS freeing for the CAF in assignment
+! { dg-final { scan-tree-dump-times "_gfortran_caf_deregister" 2 "original" } }
+
+! Only malloc "ii":
+! { dg-final { scan-tree-dump-times "__builtin_malloc" 1 "original" } }
+
+! But copy "ii" and "CAF":
+! { dg-final { scan-tree-dump-times "__builtin_memcpy" 2 "original" } }
+
+! { dg-final { cleanup-tree-dump "original" } }