Since access descriptor is created for each VH operation site, we can optimistically cache the adapted method handle in a site if the site operates on a constant VH. Used a C2 IR test to verify such a setup through an inexact VarHandle invocation can be constant folded through (previously, it was blocked by `asType`)
------------- Commit messages: - 8160821 Changes: https://git.openjdk.org/jdk/pull/28585/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28585&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8160821 Stats: 135 lines in 7 files changed: 104 ins; 20 del; 11 mod Patch: https://git.openjdk.org/jdk/pull/28585.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28585/head:pull/28585 PR: https://git.openjdk.org/jdk/pull/28585
