RFR (XS): rev3 8152856: Xcode 7.3 -Wshift-negative-value compile failure on Mac OS X

[Gerard Ziemski]

Thank you Vladimir for the review.


cheers

> On May 4, 2016, at 11:20 AM, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
> 
> Looks good.
> 
> Best regards,
> Vladimir Ivanov
> 
> On 5/4/16 7:02 PM, Gerard Ziemski wrote:
>> PING
>> 
>> Can I please have a review of this small fix? I have removed makefile change, which is no longer needed, so this should be non-controversial to review:
>> 
>> bug:    https://bugs.openjdk.java.net/browse/JDK-8152856
>> webrev:	http://cr.openjdk.java.net/~gziemski/8152856_rev3
>> 
>> 
>> cheers
>> 
>>> On Apr 6, 2016, at 11:35 AM, Gerard Ziemski <gerard.ziemski at oracle.com> wrote:
>>> 
>>> hi all,
>>> 
>>> I have implemented and tested out the new proposed fix using constant instead of casts. Please review this new fix:
>>> 
>>> bug:		https://bugs.openjdk.java.net/browse/JDK-8152856
>>> webrev:	http://cr.openjdk.java.net/~gziemski/8152856_rev2
>>> 
>>> Passes JPRT hotspot and RBT hotspot/test/:hotspot_runtime
>>> 
>>> 
>>> cheers
>>> 
>>>> On Mar 31, 2016, at 9:08 AM, Gerard Ziemski <gerard.ziemski at oracle.com> wrote:
>>>> 
>>>> hi all,
>>>> 
>>>> Since no-one has reviewed this yet and in the meantime we changed https://wiki.openjdk.java.net/display/HotSpot/StyleGuide to discourage using enums in hotspot (see JDK-8153116 for more details) I’m going to withdraw this proposed fix and try doing it by replacing enums with constant literals instead of using casts on enums.
>>>> 
>>>> I therefore withdraw this fix for now.
>>>> 
>>>> 
>>>> cheers
>>>> 
>>>>> On Mar 29, 2016, at 4:30 PM, Gerard Ziemski <gerard.ziemski at oracle.com> wrote:
>>>>> 
>>>>> hi all,
>>>>> 
>>>>> Please review this small fix that enables Xcde 7.3 support for building hotspot, which involved 2 things:
>>>>> 
>>>>> - modify gcc.make to add support for 7.3 version of clang compiler
>>>>> - modify src/cpu/x86/vm/stubGenerator_x86_64.cpp, src/share/vm/oops/klass.hpp and src/share/vm/opto/library_call.cpp to cast 4 instances of signed int to unsigned when using shift operator to avoid "-Wshift-negative-value" warning.
>>>>> 
>>>>> https://bugs.openjdk.java.net/browse/JDK-8152856
>>>>> http://cr.openjdk.java.net/~gziemski/8152856_rev1
>>>>> 
>>>>> Passes JPRT hotspot on all platforms
>>>>> 
>>>> 
>>> 
>>