RFR: 8305236: Some LoadLoad barriers in the interpreter are unnecessary after JDK-8220051 [v3]

[SUN Guoyun]

> After JDK-8220051, Interpreter::notice_safepoints() only be executed at a safe point, so LoadLoad barrier is useless.
> Barrier directives are generally time-consuming, so this patch removes LoadLoad be used for aarch64 and riscv.
> 
> Jtreg tier1-2 testing for aarch64 has been done.
> 
> Please help review it.
> 
> Thanks.

SUN Guoyun has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  8305236: Some LoadLoad barriers in the interpreter are unnecessary after JDK-8220051

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Changes: https://git.openjdk.org/jdk/pull/13244/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13244&range=02
  Stats: 24 lines in 2 files changed: 0 ins; 24 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13244.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13244/head:pull/13244

PR: https://git.openjdk.org/jdk/pull/13244