RFR: 8312579: [JVMCI] JVMCI support for virtual Vector API objects [v3]

[Gergö Barany]

> Optimized Vector API values are represented as raw values in SIMD registers. When deoptimizing with such a value in the state, a Java heap object must be recreated. HotSpot has a special "Location::vector" location type to mark Vector API values, and it knows how to materialize such values.
> 
> Extend the JVMCI code installer to mark the appropriate values as vectors so that JVMCI-compiled code can also deoptimize with Vector API values in SIMD registers.

Gergö Barany has updated the pull request incrementally with one additional commit since the last revision:

  Enable Vector API support code when JVMCI is defined

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15003/files
  - new: https://git.openjdk.org/jdk/pull/15003/files/87f81107..3172dfe8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15003&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15003&range=01-02

  Stats: 8 lines in 3 files changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/15003.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15003/head:pull/15003

PR: https://git.openjdk.org/jdk/pull/15003