[Bug middle-end/51949] [4.7 Regression] expand_call: seg fault caused by IPA split

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51949

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-23 
10:42:04 UTC ---
We do not honor cur_node->local.can_change_signature, and that does not
take into account return value removal.  I have a smallish workaround.