RFR: 8303374: Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview) [v38]

[Aggelos Biboudis]

> This is the proposed patch for Primitive types in patterns, instanceof, and switch (Preview).
> 
> Draft spec here: https://cr.openjdk.org/~abimpoudis/instanceof/latest/

Aggelos Biboudis has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 54 commits:

 - Merge branch 'master' into primitive-patterns
 - Cleanup
 - Merge branch 'master' into primitive-patterns
 - Remove trailing spaces
 - Merge branch 'primitive-patterns-and-generating-dispatch' into primitive-patterns
 - Fixed switch in the cases of unboxing and widening
 - Merge branch 'JDK-8319220' into primitive-patterns
 - Merge branch 'master' into JDK-8319220
 - reflecting review comment: fixing letter case.
 - Reflecting review feedback.
 - ... and 44 more: https://git.openjdk.org/jdk/compare/d2ba3b1e...a03fea7c

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Changes: https://git.openjdk.org/jdk/pull/15638/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15638&range=37
  Stats: 3248 lines in 41 files changed: 2985 ins; 110 del; 153 mod
  Patch: https://git.openjdk.org/jdk/pull/15638.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15638/head:pull/15638

PR: https://git.openjdk.org/jdk/pull/15638