RFR: 8340544: Optimize setLocalsFromArg

[Shaojin Wen]

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

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Commit messages:
 - optimize setLocalsFromArg

Changes: https://git.openjdk.org/jdk/pull/21106/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21106&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340544
  Stats: 27 lines in 1 file changed: 8 ins; 5 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/21106.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21106/head:pull/21106

PR: https://git.openjdk.org/jdk/pull/21106