RFR: 8339401: Optimize ClassFile load and store instructions [v2]

[Claes Redestad]

On Mon, 2 Sep 2024 14:50:33 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>> BytecodeHelpers' loadOpcode and storeOpcode are large methods with code size greater than 325, break it into multiple small methods and call them directly in DirectCodeBuilder
>
> Shaojin Wen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   suggestion from @liach

Marked as reviewed by redestad (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/20739#pullrequestreview-2277230070