re PR fortran/63152 (needless initialization of local pointer arrays.)

2014-09-19  Joost VandeVondele  <vondele@gcc.gnu.org>

	PR fortran/63152
	* trans-array.c (gfc_trans_deferred_array): Only nullify allocatables.

2014-09-19  Joost VandeVondele  <vondele@gcc.gnu.org>

	PR fortran/63152
	* gfortran.dg/auto_char_dummy_array_1.f90: Fix undefined behavior.
	* gfortran.dg/pr63152.f90: New test.

From-SVN: r215387

gcc/fortran/ChangeLog

+2014-09-19  Joost VandeVondele  <vondele@gcc.gnu.org>
+
+	PR fortran/63152
+	* trans-array.c (gfc_trans_deferred_array): Only nullify allocatables.
+
 2014-09-15  Jakub Jelinek  <jakub@redhat.com>
 
 	* Make-lang.in (check_gfortran_parallelize): Change to just an upper

gcc/fortran/trans-array.c

@@ -8647,8 +8647,8 @@ gfc_trans_deferred_array (gfc_symbol * sym, gfc_wrapped_block * block)
       type = TREE_TYPE (descriptor);
     }
 
-  /* NULLIFY the data pointer.  */
-  if (GFC_DESCRIPTOR_TYPE_P (type) && !sym->attr.save)
+  /* NULLIFY the data pointer, for non-saved allocatables.  */
+  if (GFC_DESCRIPTOR_TYPE_P (type) && !sym->attr.save && sym->attr.allocatable)
     gfc_conv_descriptor_data_set (&init, descriptor, null_pointer_node);
 
   gfc_restore_backend_locus (&loc);

gcc/testsuite/ChangeLog

+2014-09-19  Joost VandeVondele  <vondele@gcc.gnu.org>
+
+	PR fortran/63152
+	* gfortran.dg/auto_char_dummy_array_1.f90: Fix undefined behavior.
+	* gfortran.dg/pr63152.f90: New test.
+
 2014-09-19  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/58328

gcc/testsuite/gfortran.dg/auto_char_dummy_array_1.f90

@@ -11,6 +11,8 @@ end module global
 program oh_no_not_pr15908_again
   character(12), dimension(:), pointer :: ptr
 
+  nullify(ptr)
+
   call a (ptr, 12)
   if (.not.associated (ptr) ) call abort ()
   if (any (ptr.ne."abc")) call abort ()