Hello,
Just some things I've had in my tree for a while now, ChangeLog says it all:
* bb-reorder.c (fix_crossing_unconditional_branches): Remove a
set-but-unused variable.
* cgraph.c (cgraph_release_function_body): Clear cfun->cfg to make
basic blocks of released function bodies garbage-collectable.
* ree.c (find_and_remove_re): Do not call df_finish_pass here.
(struct rtl_opt_pass): Add TODO_df_finish.
* rtl.def (DEFINE_SUBST, DEFINE_SUBST_ATTR): Add documentation.
Bootstrapped&tested on powerpc64-unknown-linux-gnu.
OK for trunk?