PR middle-end/42874

[pf3gnuchains/gcc-fork.git] / gcc / tree-inline.c

diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c
index e08842c..815d88a 100644 (file)
--- a/gcc/tree-inline.c
+++ b/gcc/tree-inline.c
@@ -2730,39 +2730,6 @@ has_label_address_in_static_1 (tree *nodep, int *walk_subtrees, void *fnp)
   return NULL_TREE;
 }
 
-/* Callback through walk_tree.  Determine if we've got an aggregate
-   type that we can't support; return non-null if so.  */
-
-static tree
-cannot_copy_type_1 (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED,
-                    void *data ATTRIBUTE_UNUSED)
-{
-  tree t, node = *nodep;
-
-  if (TREE_CODE (node) == RECORD_TYPE || TREE_CODE (node) == UNION_TYPE)
-    {
-      /* We cannot inline a function of the form
-
-          void F (int i) { struct S { int ar[i]; } s; }
-
-        Attempting to do so produces a catch-22.
-        If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
-        UNION_TYPE nodes, then it goes into infinite recursion on a
-        structure containing a pointer to its own type.  If it doesn't,
-        then the type node for S doesn't get adjusted properly when
-        F is inlined.
-
-        ??? This is likely no longer true, but it's too late in the 4.0
-        cycle to try to find out.  This should be checked for 4.1.  */
-      for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t))
-       if (variably_modified_type_p (TREE_TYPE (t), NULL))
-         return node;
-    }
-
-  return NULL_TREE;
-}
-
-
 /* Determine if the function can be copied.  If so return NULL.  If
    not return a string describng the reason for failure.  */
 
@@ -2805,16 +2772,6 @@ copy_forbidden (struct function *fun, tree fndecl)
                      "address of local label in a static variable");
          goto fail;
        }
-
-      if (!TREE_STATIC (decl) && !DECL_EXTERNAL (decl)
-         && variably_modified_type_p (TREE_TYPE (decl), NULL)
-         && walk_tree_without_duplicates (&TREE_TYPE (decl),
-                                          cannot_copy_type_1, NULL))
-       {
-         reason = G_("function %q+F can never be copied "
-                     "because it uses variable sized variables");
-         goto fail;
-       }
     }
 
  fail: