[jdk17u-dev] RFR: 8279560: AArch64: generate_compare_long_string_same_encoding and LARGE_LOOP_PREFETCH alignment [v2]

[Dmitry Chuyko]

> This is a trivial follow-up to JDK-8268231 that puts loop alignment in the right place. It can improve the intrinsic performance on some aarch64 implementations.
> 
> Testing: jtreg tier1, tier2, test/hotspot/jtreg/compiler/intrinsics/string on Graviton 2.

Dmitry Chuyko has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-8279560
 - Backport 126328cb6218a93d23ed6169d7e52fb2719528ed

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk17u-dev/pull/191/files
  - new: https://git.openjdk.java.net/jdk17u-dev/pull/191/files/5bc5c879..02eb28ae

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=191&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=191&range=00-01

  Stats: 142 lines in 5 files changed: 132 ins; 2 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/191.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/191/head:pull/191

PR: https://git.openjdk.java.net/jdk17u-dev/pull/191