On Jul 12, 2012, at 11:47 PM, Chung-Lin Tang <clt...@codesourcery.com> wrote: >> and then for the return value, maybe a const0_rtx for Pmode. > > A little unsure what you mean. Are you referring to return const0_rtx > for default_expand_builtin_thread_pointer() instead of NULL?
Yes. NULL has the habit of crashing things if they don't expect it.
