RFR [11,8]: Fix Windows build failures

[Roman Kennke]

Looks good, thanks!

I assume sh/jdk is not affected?

Roman


> This fixes a trivial build failure in sh/jdk11 on Windows, and makes sure this code looks the same
> across all repositories.
> 
> *) sh/jdk11 patch:
> 
> diff -r e48900685530 src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp  Thu Oct 25 20:38:26 2018 +0200
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp  Thu Nov 01 12:23:34 2018 +0100
> @@ -593,11 +593,11 @@
> 
>    int region_size_log = log2_long((jlong) region_size);
>    // Recalculate the region size to make sure it's a power of
>    // 2. This means that region_size is the largest power of 2 that's
>    // <= what we've calculated so far.
> -  region_size = (1u << region_size_log);
> +  region_size = size_t(1) << region_size_log;
> 
>    // Now, set up the globals.
>    guarantee(RegionSizeBytesShift == 0, "we should only set it once");
>    RegionSizeBytesShift = (size_t)region_size_log;
> 
> 
> *) sh/jdk8 patch:
> 
> diff -r 0f8d2b4af256 src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp
> --- a/src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp        Thu Oct 25 20:38:26
> 2018 +0200
> +++ b/src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp        Thu Nov 01 12:20:38
> 2018 +0100
> @@ -545,11 +545,11 @@
> 
>    int region_size_log = log2_long((jlong) region_size);
>    // Recalculate the region size to make sure it's a power of
>    // 2. This means that region_size is the largest power of 2 that's
>    // <= what we've calculated so far.
> -  region_size = (size_t(1) << region_size_log);
> +  region_size = size_t(1) << region_size_log;
> 
>    // Now, set up the globals.
>    guarantee(RegionSizeBytesShift == 0, "we should only set it once");
>    RegionSizeBytesShift = (size_t)region_size_log;
> 
> 
> Testing: Windows builds for sh/jdk8 and sh/jdk11
> 
> Thanks,
> -Aleksey
>