RFR: 8345158: IGV: local scheduling should not place successors before predecessors

[Daniel Skantz]

A slight tweak to consider def-use in scheduleBlock.

Testing: opened a few graphs in control-flow graph mode without any assertion failure.

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Commit messages:
 - Merge branch 'master' of github.com:openjdk/jdk into igv
 - def-use local schedule fix

Changes: https://git.openjdk.org/jdk/pull/22481/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22481&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345158
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/22481.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22481/head:pull/22481

PR: https://git.openjdk.org/jdk/pull/22481