RFR: 8324050: Issue store-store barrier after re-materializing objects during deoptimization [v2]

[Vladimir Kozlov]

> Added missing store-store barrier when we re-materialize scalar replaced object during deoptimization.
> 
> I also removed redundant `#if COMPILER2_OR_JVMCI` guards which were leftover from [JDK-8312579](https://bugs.openjdk.org/browse/JDK-8312579) changes. It added Vector API support to Graal and changed `#ifdef COMPILER2` to these `#if`. But this code is already under these `ifs`.
> 
> Tested tier1-3, scope, stress.
> 
> No new regression test.  I think it is "almost" impossible to hit this issue because there is a lot of VM's runtime code between the code which rematerialize scalar-replaced objects during deoptimization and a code in Interpreter which is executed after deoptimization and which may execute a store instruction that makes these objects accessible by other threads.

Vladimir Kozlov has updated the pull request incrementally with one additional commit since the last revision:

  Restore COMPILER2_OR_JVMCI changes

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17503/files
  - new: https://git.openjdk.org/jdk/pull/17503/files/49d44048..392135ed

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17503&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17503&range=00-01

  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17503.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17503/head:pull/17503

PR: https://git.openjdk.org/jdk/pull/17503