[jdk17u-dev] RFR: 8320379: C2: Sort spilling/unspilling sequence for better ld/st merging into ldp/stp on AArch64 [v2]

[Xiaolong Peng]

> Backport JDK-8320379: C2: Sort spilling/unspilling sequence for better ld/st merging into ldp/stp on AArch64
> 
> ### Verification
> Tested on AWS Graviton instance by running ```JTREG_KEYWORDS="!headful & !external-dep & !printer" make test TEST=all```, only saw few test failures in CAInterop.java and compiler/intrinsics. 
> 
> - CAInterop tests are known intermittently failing tests, it should be fine to ignore. 
> - The test failures from compiler/intrinsics has error message "Option 'UseSHA3Intrinsics' is expected to have 'true' value Option 'UseSHA3Intrinsics' should be enabled by default", it seems a bug but not related to the backport, will follow up if we need to create a bug.

Xiaolong Peng 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 backport
 - Backport 3ccd02f14211a3384f27fba1633f9d8421378c9a

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2535/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2535/files/c9f1c150..7695d7a2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2535&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2535&range=00-01

  Stats: 3599 lines in 105 files changed: 1762 ins; 870 del; 967 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2535.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2535/head:pull/2535

PR: https://git.openjdk.org/jdk17u-dev/pull/2535