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

[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 indices corresponding to this new alias type and update the memory edges of user memory nodes in the ideal graph to eases out scalar replacement for non-escaping allocations.

Please review and share feedback.

Best Regards,
Jatin

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Commit messages:
 - 8311023: assert(false) failed: EA: missing memory path

Changes: https://git.openjdk.org/jdk/pull/14764/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14764&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311023
  Stats: 52 lines in 2 files changed: 51 ins; 0 del; 1 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