RFR (XS) 8241842: Shenandoah: inline ShenandoahHeapRegion::region_number

[Roman Kennke]

Yup!

Thanks,
Roman

> RFE:
>   https://bugs.openjdk.java.net/browse/JDK-8241842
> 
> ShenandoahHeapRegion::region_number is used on a few hotpaths, and should be inlined.
> 
> Fix:
> 
> diff -r 8aa307793ffe src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp  Mon Mar 30 14:49:17 2020 +0200
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp  Mon Mar 30 14:57:23 2020 +0200
> @@ -78,8 +78,4 @@
>  }
> 
> -size_t ShenandoahHeapRegion::region_number() const {
> -  return _region_number;
> -}
> -
>  void ShenandoahHeapRegion::report_illegal_transition(const char *method) {
>    ResourceMark rm;
> diff -r 8aa307793ffe src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp  Mon Mar 30 14:49:17 2020 +0200
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp  Mon Mar 30 14:57:23 2020 +0200
> @@ -354,5 +354,7 @@
>    }
> 
> -  size_t region_number() const;
> +  inline size_t region_number() const {
> +    return _region_number;
> +  }
> 
>    // Allocation (return NULL if full)
> 
> Testing: hotspot_gc_shenandoah
>