scalar replacement of arrays affected by minor changes to surrounding code

[Roland Westrelin]

> The problem with that one is that EA would need the loop to be fully
> unrolled to eliminate the allocation but that only happens after EA. So
> it's a pass ordering problem. We already run a pass of loop
> optimizations before EA so it seems we could have it take care of fully
> unrolling the loop.

I created JDK-8231291 for that one.

Roland.