[jdk17u-dev] RFR: 8329570: G1: Excessive is_obj_dead_cond calls in verification [v2]

[Aleksey Shipilev]

> Unclean backport to improve fastdebug build performance, which improves testing. The code shape in JDK 17 is different, I reapplied the hunks in places relevant to JDK 17.
> 
> Additional testing:
>  - [ ] GHA

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Fix the assert

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2425/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2425/files/56104f5b..9bb28d41

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2425&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2425&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2425.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2425/head:pull/2425

PR: https://git.openjdk.org/jdk17u-dev/pull/2425