re PR fortran/43362 (ICE with structure constuctor with DT component)

2010-03-14  Tobias Burnus  <burnus@net-b.de>

        PR fortran/43362
        * resolve.c (resolve_structure_cons): Add missing PURE
        * constraint.
        (resolve_ordinary_assign): Add check to avoid segfault.

2010-03-14  Tobias Burnus  <burnus@net-b.de>

        PR fortran/43362
        * gfortran.dg/impure_constructor_1.f90: New test.

From-SVN: r157447

gcc/fortran/ChangeLog

+2010-03-14  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/43362
+	* resolve.c (resolve_structure_cons): Add missing PURE constraint.
+	(resolve_ordinary_assign): Add check to avoid segfault.
+
 2010-03-12  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/43291

gcc/fortran/resolve.c

@@ -921,6 +921,16 @@ resolve_structure_cons (gfc_expr *expr)
 		     "for pointer component '%s' should be a POINTER or "
 		     "a TARGET", &cons->expr->where, comp->name);
 	}
+
+      /* F2003, C1272 (3).  */
+      if (gfc_pure (NULL) && cons->expr->expr_type == EXPR_VARIABLE
+	  && gfc_impure_variable (cons->expr->symtree->n.sym))
+	{
+	  t = FAILURE;
+	  gfc_error ("Invalid expression in the derived type constructor for pointer "
+		     "component '%s' at %L in PURE procedure", comp->name,
+		     &cons->expr->where);
+	}
     }
 
   return t;
@@ -7947,6 +7957,7 @@ resolve_ordinary_assign (gfc_code *code, gfc_namespace *ns)
       if (lhs->ts.type == BT_DERIVED
 	    && lhs->expr_type == EXPR_VARIABLE
 	    && lhs->ts.u.derived->attr.pointer_comp
+	    && rhs->expr_type == EXPR_VARIABLE
 	    && gfc_impure_variable (rhs->symtree->n.sym))
 	{
 	  gfc_error ("The impure variable at %L is assigned to "

gcc/testsuite/ChangeLog

+2010-03-14  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/43362
+	* gfortran.dg/impure_constructor_1.f90: New test.
+
 2010-03-13  Sebastian Pop  <sebastian.pop@amd.com>
 
 	PR middle-end/43354

gcc/testsuite/gfortran.dg/impure_constructor_1.f90

+! { dg-do compile }
+!
+! PR fortran/43362
+!
+module m
+  implicit none
+  type t
+    integer, pointer :: a
+  end type t
+  type t2
+    type(t) :: b
+  end type t2
+  type t3
+    type(t), pointer :: b
+  end type t3
+contains
+ pure subroutine foo(x)
+   type(t), target, intent(in) :: x
+   type(t2) :: y
+   type(t3) :: z
+
+   ! The following gave an ICE but is valid:
+   y = t2(x) ! Note: F2003, C1272 (3) and (4) do not apply
+   
+   ! Variant which is invalid as C1272 (3) applies
+   z = t3(x) ! { dg-error "Invalid expression in the derived type constructor" }
+ end subroutine foo
+end module m
+
+