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Subject: [Bug fortran/55207] Automatic deallocation of variables declared in the main program
Date: Sun, 04 Nov 2012 18:32:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55207

--- Comment #1 from janus at gcc dot gnu.org 2012-11-04 18:32:29 UTC ---
Patch:

Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c    (revision 193135)
+++ gcc/fortran/trans-decl.c    (working copy)
@@ -3771,9 +3771,10 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, gf
           else
         gfc_restore_backend_locus (&loc);

-          /* Deallocate when leaving the scope. Nullifying is not
-         needed.  */
-          if (!sym->attr.result && !sym->attr.dummy)
+          /* Automatic deallocation when leaving the scope.
+         Nullifying is not needed.  */
+          if (!proc_sym->attr.is_main_program
+          && !sym->attr.result && !sym->attr.dummy)
         {
           if (sym->ts.type == BT_CLASS
               && CLASS_DATA (sym)->attr.codimension)



This regresses on:

FAIL: gfortran.dg/allocatable_scalar_9.f90  -O0   scan-tree-dump-times original
"__builtin_free" 32
FAIL: gfortran.dg/coarray_lib_alloc_2.f90  -O   scan-tree-dump-times original
"_gfortran_caf_deregister .&yy._data.token, 0B, 0B, 0.;" 1
FAIL: gfortran.dg/move_alloc_4.f90  -O0   scan-tree-dump-times original
"__builtin_free" 9