tree.c (decl_value_expr_lookup): Revert latest change.

	* tree.c (decl_value_expr_lookup): Revert latest change.
	(decl_value_expr_insert): Likewise.
fortran/
	* trans-decl.c (gfc_get_fake_result_decl): Revert latest change.

From-SVN: r261696

gcc/ChangeLog

+2018-06-18  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* tree.c (decl_value_expr_lookup): Revert latest change.
+	(decl_value_expr_insert): Likewise.
+
 2018-06-17  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gimplify.c (nonlocal_vlas): Delete.

gcc/fortran/ChangeLog

+2018-06-18  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* trans-decl.c (gfc_get_fake_result_decl): Revert latest change.
+
 2018-06-17  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* trans-decl.c (nonlocal_dummy_decl_pset): Delete.

gcc/fortran/trans-decl.c

@@ -2908,14 +2908,13 @@ gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag)
       && sym->ns->proc_name->attr.entry_master
       && sym != sym->ns->proc_name)
     {
-      tree t = NULL, var, field;
+      tree t = NULL, var;
       if (this_fake_result_decl != NULL)
 	for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t))
 	  if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0)
 	    break;
       if (t)
 	return TREE_VALUE (t);
-
       decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag);
 
       if (parent_flag)
@@ -2923,17 +2922,20 @@ gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag)
       else
 	this_fake_result_decl = current_fake_result_decl;
 
-      if (!sym->ns->proc_name->attr.mixed_entry_master)
-	return decl;
+      if (decl && sym->ns->proc_name->attr.mixed_entry_master)
+	{
+	  tree field;
 
-      for (field = TYPE_FIELDS (TREE_TYPE (decl));
-	   field; field = DECL_CHAIN (field))
-	if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), sym->name) == 0)
-	  break;
+	  for (field = TYPE_FIELDS (TREE_TYPE (decl));
+	       field; field = DECL_CHAIN (field))
+	    if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
+		sym->name) == 0)
+	      break;
 
-      gcc_assert (field != NULL_TREE);
-      decl = fold_build3_loc (input_location, COMPONENT_REF,
-			      TREE_TYPE (field), decl, field, NULL_TREE);
+	  gcc_assert (field != NULL_TREE);
+	  decl = fold_build3_loc (input_location, COMPONENT_REF,
+				  TREE_TYPE (field), decl, field, NULL_TREE);
+	}
 
       var = create_tmp_var_raw (TREE_TYPE (decl), sym->name);
       if (parent_flag)

gcc/tree.c

@@ -6337,15 +6337,7 @@ decl_value_expr_lookup (tree from)
 
   h = value_expr_for_decl->find_with_hash (&in, DECL_UID (from));
   if (h)
-    {
-      /* Chains of value expressions may run afoul of garbage collection.  */
-      gcc_checking_assert (!(h->to
-			     && (TREE_CODE (h->to) == PARM_DECL
-				 || TREE_CODE (h->to) == VAR_DECL)
-			     && DECL_HAS_VALUE_EXPR_P (h->to)));
-      return h->to;
-    }
-
+    return h->to;
   return NULL_TREE;
 }
 
@@ -6356,12 +6348,6 @@ decl_value_expr_insert (tree from, tree to)
 {
   struct tree_decl_map *h;
 
-  /* Chains of value expressions may run afoul of garbage collection.  */
-  gcc_checking_assert (!(to
-			 && (TREE_CODE (to) == PARM_DECL
-			     || TREE_CODE (to) == VAR_DECL)
-			 && DECL_HAS_VALUE_EXPR_P (to)));
-
   h = ggc_alloc<tree_decl_map> ();
   h->base.from = from;
   h->to = to;