RFR: 8303374: Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview) [v41]

[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 60 commits:

 - Improve Javadoc of ExactConversionsSupport
 - Merge branch 'master' into primitive-patterns
 - Update ExactConversionsSupport Javadoc and JDK version
 - Revert "Update copyright year, javadoc, JDK version"
   
   This reverts commit 676af9de90d946f64f34762a6df94dbd91bce41b.
 - Update copyright year, javadoc, JDK version
 - Merge branch 'master' into primitive-patterns
 - Merge branch 'master' into primitive-patterns
 - Cleanup
 - Merge branch 'master' into primitive-patterns
 - Remove trailing spaces
 - ... and 50 more: https://git.openjdk.org/jdk/compare/c9cacfb2...50cb9832

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Changes: https://git.openjdk.org/jdk/pull/15638/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15638&range=40
  Stats: 3272 lines in 41 files changed: 3008 ins; 110 del; 154 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