re PR fortran/30554 ([4.1 only] ICE in mio_pointer_ref at module.c:1945)

2007-02-11  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/30554
	* module.c (find_symtree_for_symbol): New function to return
	a symtree that is not a "unique symtree" given a symbol.
	(read_module): Do not automatically set pointer_info to
	referenced because this inhibits the generation of a unique
	symtree.  Recycle the existing symtree if possible by calling
	find_symtree_for_symbol.

	PR fortran/30319
	* decl.c (add_init_expr_to_sym): Make new charlen for an array
	constructor initializer.

2007-02-11  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/30554
	* gfortran.dg/used_dummy_types_6.f90: Add the "privatized"
	versions of the modules.

	PR fortran/30617
	* gfortran.dg/intrinsic_actual_2.f90: Make this legal fortran
	by getting rid of recursive I/O and providing functions with
	results.

	PR fortran/30319
	* gfortran.dg/char_array_constructor_2.f90

From-SVN: r121824

1 files changed, 35 insertions, 1 deletions

diff --git a/gcc/fortran/module.c b/gcc/fortran/module.c
index e76bd0e..1dd81e3 100644
--- a/gcc/fortran/module.c
+++ b/gcc/fortran/module.c
@@ -3304,6 +3304,31 @@ read_cleanup (pointer_info *p)
 }
 
 
+/* Given a root symtree node and a symbol, try to find a symtree that
+   references the symbol that is not a unique name.  */
+
+static gfc_symtree *
+find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
+{
+  gfc_symtree *s = NULL;
+
+  if (st == NULL)
+    return s;
+
+  s = find_symtree_for_symbol (st->right, sym);
+  if (s != NULL)
+    return s;
+  s = find_symtree_for_symbol (st->left, sym);
+  if (s != NULL)
+    return s;
+
+  if (st->n.sym == sym && !check_unique_name (st->name))
+    return st;
+
+  return s;
+}
+
+
 /* Read a module file.  */
 
 static void
@@ -3363,8 +3388,17 @@ read_module (void)
 	continue;
 
       info->u.rsym.state = USED;
-      info->u.rsym.referenced = 1;
       info->u.rsym.sym = sym;
+
+      /* If possible recycle the symtree that references the symbol.
+	 If a symtree is not found and the module does not import one,
+	 a unique-name symtree is found by read_cleanup.  */
+      st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
+      if (st != NULL)
+	{
+	  info->u.rsym.symtree = st;
+	  info->u.rsym.referenced = 1;
+	}
     }
 
   mio_rparen ();