[jdk21u] RFR: 8314020: Print instruction blocks in byte units

[Aleksey Shipilev]

Clean backport to improve post-mortem diagnostics.

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Commit messages:
 - Backport a602624ef46908456052146d50467c60efa636c3

Changes: https://git.openjdk.org/jdk21u/pull/63/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=63&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314020
  Stats: 12 lines in 12 files changed: 0 ins; 0 del; 12 mod
  Patch: https://git.openjdk.org/jdk21u/pull/63.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/63/head:pull/63

PR: https://git.openjdk.org/jdk21u/pull/63