RFR: 8311023: assert(false) failed: EA: missing memory path [v3]

[Jatin Bhateja]

> Handling missing cases for VectorizedHashCode while collecting memory nodes for propagating new type information through the graph.
> 
> We associate new instance types with CheckCastPP nodes succeeding allocation IR, refresh connectivity of MemoryMerge slices at alias indices corresponding to new instance type and update the memory edges of user memory nodes in the ideal graph to ease out scalar replacements.
> 
> Please review and share feedback.
> 
> Best Regards,
> Jatin

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'master' of http://github.com/openjdk/jdk into JDK-8311023
 - Missed test update.
 - Rename test.
 - 8311023: assert(false) failed: EA: missing memory path

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14764/files
  - new: https://git.openjdk.org/jdk/pull/14764/files/d56563ff..344fdf9b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14764&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14764&range=01-02

  Stats: 279 lines in 29 files changed: 178 ins; 29 del; 72 mod
  Patch: https://git.openjdk.org/jdk/pull/14764.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14764/head:pull/14764

PR: https://git.openjdk.org/jdk/pull/14764