[9] RFR (XS): 8071787: Don't block inlining when DONT_INLINE_THRESHOLD=0

[John Rose]

Good.  Consider fixing the typo in 'makeBlockInlningWrapper'.  — John

On Jan 28, 2015, at 9:12 AM, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
> 
> http://cr.openjdk.java.net/~vlivanov/8071787/webrev.00/
> https://bugs.openjdk.java.net/browse/JDK-8071787
> 
> For testing & performance measurements, sometimes it's useful to replace block inlining wrappers with trivial reinvokers.
> 
> This change extends DONT_INLINE_THRESHOLD in the following manner:
>  DONT_INLINE_THRESHOLD = -1: no wrapper
>  DONT_INLINE_THRESHOLD =  0: reinvoker
>  DONT_INLINE_THRESHOLD >  0: counting wrapper
> 
> Before that DONT_INLINE_THRESHOLD=0 meant a counting wrapper which is removed on the first invocation. After the change, it's DONT_INLINE_THRESHOLD=1.
> 
> Testing: manual, java/lang/invoke
> 
> Best regards,
> Vladimir Ivanov