RFR: 8255150: Add utility methods to check long indexes and ranges [v3]

[Roland Westrelin]

On Sat, 7 Nov 2020 11:38:37 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Roland Westrelin has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR.
>
> src/hotspot/share/opto/castnode.cpp line 100:
> 
>> 98:   }
>> 99:   case Op_CastLL: {
>> 100:     assert(!carry_dependency, "carry dependency not supported");
> 
> Any particular reason to reject control dependency (except it is not used right now)?

Because it's not used. But actually now that I think more about it, I realize it's required. I updated the change with support for carry_dependency for CastLL.
Thanks for the review!

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PR: https://git.openjdk.java.net/jdk/pull/1003