[omworld-jdk] RFR: 8326753 Lilliput: OMCache: Use AoS [v3]

[Axel Boldt-Christmas]

> The OMCache entries are currently laid out as a struct of arrays. For cache locality layout the entries as an array of structs.
> 
> Using structs for the entires also allows for some cleanups. 
> 
> Ran through GHA, still need to do some more extensive testing.

Axel Boldt-Christmas has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Merge remote-tracking branch 'upstream_lilliput/omworld-jdk' into omcache-aos
 - Cleanup OMCache
 - OMCache Array of structs
 - Add flags for unrolled cache lookup in C2

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Changes: https://git.openjdk.org/lilliput/pull/140/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=140&range=02
  Stats: 49 lines in 4 files changed: 12 ins; 11 del; 26 mod
  Patch: https://git.openjdk.org/lilliput/pull/140.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/140/head:pull/140

PR: https://git.openjdk.org/lilliput/pull/140