RFR: 8257164: Share LambdaForms for VH linkers/invokers.

[Vladimir Ivanov]

On Mon, 30 Nov 2020 19:38:56 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Introduce sharing of `LambdaForms` for `VarHandle` linkers and invokers.
>> It reduces the number of LambdaForms needed at runtime.
>> 
>> Testing: tier1-4
>
> Marked as reviewed by psandoz (Reviewer).

Thanks for the reviews, Claes, Vladimir, and Paul.

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PR: https://git.openjdk.java.net/jdk/pull/1455