[lworld] RFR: 8249613: [lworld] Use initialization free allocation when copying a value

[Frederic Parain]

Please review this patch which removes some unnecessary zeroing of heap allocated inline type instances.

Passed tests tier 1 to 3 with Mach5.

Thank you,

Fred

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Commit messages:
 - Use initialization free allocation of value when possible

Changes: https://git.openjdk.java.net/valhalla/pull/110/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/110/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8249613
  Stats: 4 lines in 4 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/110.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/110/head:pull/110

PR: https://git.openjdk.java.net/valhalla/pull/110