http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55823
--- Comment #5 from Jan Hubicka <hubicka at ucw dot cz> 2013-01-02 00:10:52 UTC --- ipa-cp is behaving funny here. It clones InitCommon so THIS pointer's binfo is known to enable devirtualization of SetLayoutDirection. It doesn't devirtualize GetLayoutDirection because it works on per-argument basis. This is stupid: obviously whenever THIS binfo is known also DC binfo is known, so we should propagate both into the clone. This is missed optimization relative to previous ipa-cp implementation and I think relatively serious one - it is very common that more than one argument is constant. Martin, can you take a look? Still don't know exactly why we miss the devirtualization after inlining. Honza
