RFR: 8340544: Optimize setLocalsFromArg

[Chen Liang]

On Fri, 20 Sep 2024 09:18:32 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> CheckLocal once, reduce redundant checkLocal, rewrite switch, reduce method size, codeSize is reduced from 367 to 263.

Looks good. Using `Util.parameterSlots` avoids redundant array allocation and copies. 👍

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PR Comment: https://git.openjdk.org/jdk/pull/21106#issuecomment-2363986573