RFR: 8278947: Support for array constants in constant table [v2]

[Quan Anh Mai]

On Tue, 8 Feb 2022 18:53:40 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:
>> 
>>  - Merge branch 'master' into constantVectorUpdate
>>  - update copyright
>>  - missing type in array_constant
>>  - Merge branch 'master' into constantVector
>>  - use constant table for remaining types
>>  - Merge branch 'master' into constantVector
>>  - refactor
>>  - replicate using constant
>>  - Merge branch 'master' into constantVector
>>  - initial commit
>
> src/hotspot/share/opto/constantTable.hpp line 41:
> 
>> 39:   private:
>> 40:     BasicType _type;
>> 41:     bool _is_array;
> 
> Can you rely on `_type` and just use `T_ARRAY` tag for that purpose?

In that case, an additional field would be needed to identify the type of the elements anyway.

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PR: https://git.openjdk.java.net/jdk/pull/6908