RFR: 8300127: Serial: Remove unnecessary from-space iteration in DefNewGeneration::oop_since_save_marks_iterate

Fri Jan 13 17:28:06 UTC 2023

Converting no-ops to assertions in young-gen obj iteration.

Test: hotspot_gc

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

Commit messages:
 - s1-from-space

Changes: https://git.openjdk.org/jdk/pull/11995/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11995&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300127
  Stats: 5 lines in 1 file changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/11995.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11995/head:pull/11995

PR: https://git.openjdk.org/jdk/pull/11995