[Patch, Fortran] Minor coarray fix: Constraint check, wrong "restrict"

[Patch, Fortran] Minor coarray fix: Constraint check, wrong "restrict"

[Tobias Burnus]

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Attached is a small coarray fix, solving two issues:

- For -fcoarray=single, nonallocatable coarrays are nonpointer - but 
currently they get set the "restrict" qualifier. (With -fcoarray=lib, 
nonallocatble coarrays are always pointers.)
  Fixed by not setting "restricted" in this case.

- The pointer association status may not be checked/modified on remote 
images. And remote (de)allocate is also invalid. However, some of those 
constraint checks were missing

OK for the trunk?

Tobias

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2011-05-27  Tobias Burnus  <burnus@net-b.de>

	PR fortran/18918
	* check.c (gfc_check_associated, gfc_check_null): Add coindexed check.
	* match.c (gfc_match_nullify): Ditto.
	* resolve.c (resolve_deallocate_expr): Ditto.
	* trans-types.c (gfc_get_nodesc_array_type): Don't set restricted
	for nonpointers.

2011-05-27  Tobias Burnus  <burnus@net-b.de>

	PR fortran/18918
	* gfortran.dg/coarray_22.f90: New.

diff --git a/gcc/fortran/check.c b/gcc/fortran/check.c
index 8641142..544253c 100644
--- a/gcc/fortran/check.c
+++ b/gcc/fortran/check.c
@@ -875,6 +875,15 @@ gfc_check_associated (gfc_expr *pointer, gfc_expr *target)
       return FAILURE;
     }
 
+  /* F2008, C1242.  */
+  if (attr1.pointer && gfc_is_coindexed (pointer))
+    {
+      gfc_error ("'%s' argument of '%s' intrinsic at %L shall not be "
+		 "conindexed", gfc_current_intrinsic_arg[0]->name,
+		 gfc_current_intrinsic, &pointer->where);
+      return FAILURE;
+    }
+
   /* Target argument is optional.  */
   if (target == NULL)
     return SUCCESS;
@@ -902,6 +911,15 @@ gfc_check_associated (gfc_expr *pointer, gfc_expr *target)
       return FAILURE;
     }
 
+  /* F2008, C1242.  */
+  if (attr1.pointer && gfc_is_coindexed (target))
+    {
+      gfc_error ("'%s' argument of '%s' intrinsic at %L shall not be "
+		 "conindexed", gfc_current_intrinsic_arg[1]->name,
+		 gfc_current_intrinsic, &target->where);
+      return FAILURE;
+    }
+
   t = SUCCESS;
   if (same_type_check (pointer, 0, target, 1) == FAILURE)
     t = FAILURE;
@@ -2651,6 +2669,15 @@ gfc_check_null (gfc_expr *mold)
       return FAILURE;
     }
 
+  /* F2008, C1242.  */
+  if (gfc_is_coindexed (mold))
+    {
+      gfc_error ("'%s' argument of '%s' intrinsic at %L shall not be "
+		 "conindexed", gfc_current_intrinsic_arg[0]->name,
+		 gfc_current_intrinsic, &mold->where);
+      return FAILURE;
+    }
+
   return SUCCESS;
 }
 
diff --git a/gcc/fortran/trans-types.c b/gcc/fortran/trans-types.c
index 9c4f5f6..94b9a59 100644
--- a/gcc/fortran/trans-types.c
+++ b/gcc/fortran/trans-types.c
@@ -1543,13 +1543,12 @@ gfc_get_nodesc_array_type (tree etype, gfc_array_spec * as, gfc_packed packed,
   if (as->rank == 0)
     {
       if (packed != PACKED_STATIC  || gfc_option.coarray == GFC_FCOARRAY_LIB)
-	type = build_pointer_type (type);
+	{
+	  type = build_pointer_type (type);
 
-      if (restricted)
-        type = build_qualified_type (type, TYPE_QUAL_RESTRICT);	
+	  if (restricted)
+	    type = build_qualified_type (type, TYPE_QUAL_RESTRICT);	
 
-      if (packed != PACKED_STATIC  || gfc_option.coarray == GFC_FCOARRAY_LIB)
-	{
 	  GFC_ARRAY_TYPE_P (type) = 1;
 	  TYPE_LANG_SPECIFIC (type) = TYPE_LANG_SPECIFIC (TREE_TYPE (type)); 
 	}
diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 75f2a7f..f275239 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -3194,6 +3194,13 @@ gfc_match_nullify (void)
       if (gfc_check_do_variable (p->symtree))
 	goto cleanup;
 
+      /* F2008, C1242.  */
+      if (gfc_is_coindexed (p))
+	{
+	  gfc_error ("Pointer object at %C shall not be conindexed");
+	  goto cleanup;
+	}
+
       /* build ' => NULL() '.  */
       e = gfc_get_null_expr (&gfc_current_locus);
 
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 3483bc7..4b18529 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -6494,6 +6494,13 @@ resolve_deallocate_expr (gfc_expr *e)
       return FAILURE;
     }
 
+  /* F2008, C644.  */
+  if (gfc_is_coindexed (e))
+    {
+      gfc_error ("Coindexed allocatable object at %L", &e->where);
+      return FAILURE;
+    }
+
   if (pointer
       && gfc_check_vardef_context (e, true, _("DEALLOCATE object")) == FAILURE)
     return FAILURE;

--- /dev/null	2011-05-27 07:14:06.059892443 +0200
+++ gcc/gcc/testsuite/gfortran.dg/coarray_22.f90	2011-05-27 08:03:48.000000000 +0200
@@ -0,0 +1,33 @@
+! { dg-do compile }
+! { dg-options "-fcoarray=single" }
+!
+! Constraint checks for invalid access of remote pointers
+! (Accessing the value is ok, checking/changing association
+!  status is invalid)
+!
+! PR fortran/18918
+!
+type t
+  integer, pointer :: ptr => null()
+end type t
+type(t) :: x[*], y[*]
+
+if (associated(x%ptr)) stop 0
+if (associated(x%ptr,y%ptr)) stop 0
+
+if (associated(x[1]%ptr)) stop 0  ! { dg-error "shall not be conindexed" }
+if (associated(x%ptr,y[1]%ptr)) stop 0  ! { dg-error "shall not be conindexed" }
+
+nullify (x%ptr)
+nullify (x[1]%ptr)  ! { dg-error "shall not be conindexed" }
+
+x%ptr => null(x%ptr)
+x%ptr => null(x[1]%ptr)  ! { dg-error "shall not be conindexed" }
+x[1]%ptr => null(x%ptr)  ! { dg-error "shall not have a coindex" }
+
+allocate(x%ptr)
+deallocate(x%ptr)
+
+allocate(x[1]%ptr)  ! { dg-error "Coindexed allocatable object" }
+deallocate(x[1]%ptr)  ! { dg-error "Coindexed allocatable object" }
+end

Re: [Patch, Fortran] Minor coarray fix: Constraint check, wrong "restrict"

[Daniel Kraft]

On 05/27/11 08:10, Tobias Burnus wrote:
> Attached is a small coarray fix, solving two issues:
> 
> - For -fcoarray=single, nonallocatable coarrays are nonpointer - but
> currently they get set the "restrict" qualifier. (With -fcoarray=lib,
> nonallocatble coarrays are always pointers.)
>  Fixed by not setting "restricted" in this case.
> 
> - The pointer association status may not be checked/modified on remote
> images. And remote (de)allocate is also invalid. However, some of those
> constraint checks were missing
> 
> OK for the trunk?

Ok.   Thanks for the patch!

Daniel

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Re: [Patch, Fortran] Minor coarray fix: Constraint check, wrong "restrict"

[jerry DeLisle]

On 05/26/2011 11:10 PM, Tobias Burnus wrote:
> Attached is a small coarray fix, solving two issues:
>
> - For -fcoarray=single, nonallocatable coarrays are nonpointer - but currently 
> they get set the "restrict" qualifier. (With -fcoarray=lib, nonallocatble 
> coarrays are always pointers.)
>  Fixed by not setting "restricted" in this case.
>
> - The pointer association status may not be checked/modified on remote images. 
> And remote (de)allocate is also invalid. However, some of those constraint 
> checks were missing
>
> OK for the trunk?
>
> Tobias
This is OK and thanks for your great work on this.

Jerry