Add todo comment for move_sese_region_to_fn

2015-08-11  Tom de Vries  <tom@codesourcery.com>

	* tree-cfg.c (move_sese_region_to_fn): Add todo comment.

From-SVN: r226776

gcc/ChangeLog

+2015-08-11  Tom de Vries  <tom@codesourcery.com>
+
+	* tree-cfg.c (move_sese_region_to_fn): Add todo comment.
+
 2015-08-10  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/i386/i386.c (processor_alias_table): Replace CPU_KNL

gcc/tree-cfg.c

@@ -7011,7 +7011,11 @@ verify_sese (basic_block entry, basic_block exit, vec<basic_block> *bbs_p)
 
    All local variables referenced in the region are assumed to be in
    the corresponding BLOCK_VARS and unexpanded variable lists
-   associated with DEST_CFUN.  */
+   associated with DEST_CFUN.
+
+   TODO: investigate whether we can reuse gimple_duplicate_sese_region to
+   reimplement move_sese_region_to_fn by duplicating the region rather than
+   moving it.  */
 
 basic_block
 move_sese_region_to_fn (struct function *dest_cfun, basic_block entry_bb,