RFR: 8325144: C1: Optimize CriticalEdgeFinder

[Denghui Dong]

Hi,

Please help review this change that removed the sorting process in split_edges by checking if the 'to' block has been substituted.

Thanks

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Commit messages:
 - 8325144: C1: Optimize CriticalEdgeFinder

Changes: https://git.openjdk.org/jdk/pull/17674/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17674&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325144
  Stats: 28 lines in 2 files changed: 6 ins; 18 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/17674.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17674/head:pull/17674

PR: https://git.openjdk.org/jdk/pull/17674