safepoint poll at return can never be elided
added Arrays.equals substitutions
pass concrete frame type as argument to NewFrameNode constructor

--HG--
extra : amend_source : 21e7600d68185c21e840ced39256ca82ecc72bd8
HSAIL: upgraded to Okra 1.8 jars
HSAIL: ensure debug configuration is initialized on Sumatra threads using Graal
Contributed-by: Eric Caspole <eric.caspole@amd.com>
lower arraycopy calls later and support unchecked object arraycopy

--HG--
extra : rebase_source : bb3fecaf257af09d22699bd319e4942d32aad053