RFR(S): 8154135: Loop alignment may be added inside the loop body

[Roland Westrelin]

Hi Christian,

Thanks for looking at this.

> I wonder if this has any performance implications (good or bad).
> This alignment is not aarch64 specific so we were doing it all the
> time.

Unless I'm missing something nops in the body of a loop can't really
help performance. This looks like a bug to me.

Roland.