RFR: 8326962: C2 SuperWord: cache VPointer [v4]

[Vladimir Kozlov]

On Wed, 3 Apr 2024 06:50:04 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> It is that arena that I pass into all submodules, such as `VLoopVPointer`. `VLoopAnalyzer` is stack allocated, so once the destructor removes its `_arena`, all submodules are also automatically deallocated.

Good.

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PR Comment: https://git.openjdk.org/jdk/pull/18577#issuecomment-2035661524