[lworld] RFR: 8349110: [lworld] Intrinsics for Unsafe.get/putFlatValue

Fri Jun 6 11:51:23 UTC 2025

Hi,

This PR implements intrinsics for `Unsafe::get/putFlatValue` and enables the corresponding tests in `TestIntrinsics`.

Please kindly review, thanks very much.

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Commit messages:
 - Implement Unsafe::flatValue accesses

Changes: https://git.openjdk.org/valhalla/pull/1482/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1482&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349110
  Stats: 178 lines in 7 files changed: 172 ins; 3 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1482.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1482/head:pull/1482

PR: https://git.openjdk.org/valhalla/pull/1482