RFR: 8297729: Replace GrowableArray in ComputeMoveOrder with hash table [v4]

[Johan Sjölen]

On Mon, 5 Dec 2022 17:48:18 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> Replaces the GrowableArray 'table' in ComputeMoveOrder with a real hash table.
>> 
>> Through testing, I found that sometimes this array is blown up to several thousand elements, most of which are `NULL`. Using a hash table prevents this large wastage.
>> 
>> I've touched up some of the surrounding code as well. Mostly style changes, but I've also removed the `BasicType` field from the `Move` and `MoveOperation` structs, since it was unused, and added frame data storages to the fast path for stack args as well, since both are allocated on the stack.
>> 
>> Testing: `jdk_foreign` test suite.
>
> Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use specialized equals function

Looks good, thank you for the changes.

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Marked as reviewed by jsjolen (Committer).

PR: https://git.openjdk.org/jdk/pull/11392