[10] RFR(S): 8182036: Load from initializing arraycopy uses wrong memory state

[Roland Westrelin]

> About last change which removed (ac->_src_type != ac->_dest_type) code. 
> Do we ever hit it? Before that we exit this code if src_elem != dest_elem.

We can hit it with escape analysis. The destination array can be non
escaping and gets its own memory slice which would then differ from the
source's memory slice.

Roland.