[lworld] RFR: 8374093: [lworld] Cleanup and polish around vgetfield/vputfield [v2]

[Joel Sikström]

> Hello,
> 
> I've been looking at the new internal bytecodes vgetfield and vputfield and their callchains from the interpreter down to InlineKlass and have some cleanups. I've not looked at templateTable_x86 so far, only templateTable_aarch64.
> 
> Some notes:
> * The `dest_is_initialized` parameter in InlineKlass::write_value_to_addr is `true` for all callers, so I've removed it and inlined `true` to the call to `copy_payload_to_addr`.
> * There seems to be an unnecessary `mark_payload_as_non_null((address)src);` in InlineKlass::copy_payload_to_addr, as the payload should already be non_null if it doesn't match `is_payload_marked_as_null` in the if-statement just above.
> 
> Testing:
> * hotspot_valhalla, jdk_valhalla and tier1

Joel Sikström has updated the pull request incrementally with one additional commit since the last revision:

  More cleanup

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/1840/files
  - new: https://git.openjdk.org/valhalla/pull/1840/files/8944d003..e1f1ffa6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1840&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1840&range=00-01

  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/1840.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1840/head:pull/1840

PR: https://git.openjdk.org/valhalla/pull/1840