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
