RFR: 8346836: C2: Introduce a way to verify the correctness of ConstraintCastNodes at runtime [v6]

[Quan Anh Mai]

> Hi,
> 
> This patch adds a develop flag `VerifyConstraintCasts`, which will verify the correctness of `CastIINode`s and `CastLLNode`s at runtime and crash the VM if the dynamic value lies outside the type value range.
> 
> Please take a look, thanks a lot.

Quan Anh Mai 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 10 additional commits since the last revision:

 - Merge branch 'master' into verifycast
 - draft
 - Merge branch 'master' into verifycast
 - Merge branch 'master' into verifycast
 - better comments
 - move test to a new file, add block_comment
 - add tests
 - make VerifyConstraintCast uint, better debug info
 - Merge branch 'master' into verifycast
 - Introduce VerifyConstraintCasts

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22880/files
  - new: https://git.openjdk.org/jdk/pull/22880/files/da854c1f..dbb69375

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22880&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22880&range=04-05

  Stats: 206556 lines in 4871 files changed: 96291 ins; 84056 del; 26209 mod
  Patch: https://git.openjdk.org/jdk/pull/22880.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22880/head:pull/22880

PR: https://git.openjdk.org/jdk/pull/22880