RFR: 8247747: Remove macro definition of "inline" in stack.hpp

[Lois Foltan]

Looks good Kim!  I like your changes to the push and pop functions.
Lois

On 6/25/2020 5:55 AM, Kim Barrett wrote:
> Please review this change to the Stack utility class, removing the
> definition of "inline" as a macro with an empty expansion.  I also
> made a couple micro-optimizations to the push and pop functions, and
> made pop_segment NOINLINE, being consistent with the similar slow path
> push_segment.
>
> Making this change didn't produce any measurable difference in the
> performance tests I ran.  This suggests the overflow part of the task
> queues is either not *too* heavily used, or maybe the effect of this
> is being drowned by other costs.
>
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8247747
>
> Webrev:
> https://cr.openjdk.java.net/~kbarrett/8247747/open.00/
>
> Testing:
> mach5 tier1
>