[code-reflection] RFR: Exception regions fix [v6]

[Adam Sotona]

> BytecodeGenerator::computeExceptionRegionMembership now collects all necessary info into BitSets and directly declares the regions with CodeBuilder.
> All tests are now passing.
> 
> Please review.
> 
> Thanks,
> Adam

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  added TestBranchCompactor

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

Changes:
  - all: https://git.openjdk.org/babylon/pull/12/files
  - new: https://git.openjdk.org/babylon/pull/12/files/39287b69..8a521693

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=12&range=05
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=12&range=04-05

  Stats: 83 lines in 2 files changed: 82 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/12.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/12/head:pull/12

PR: https://git.openjdk.org/babylon/pull/12