[jdk17] RFR: 8269575: C2: assert(false) failed: graph should be schedulable after JDK-8252372

[Roland Westrelin]

8252372 moved processing of Phis by anti-dependence analysis in the:

    for (uint i = 0; i < worklist.size() && LCA != early; i++) {

loop by accident. The intent is to process all Phis last.

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Commit messages:
 - test
 - fix

Changes: https://git.openjdk.java.net/jdk17/pull/214/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=214&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269575
  Stats: 88 lines in 2 files changed: 75 ins; 0 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/214.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/214/head:pull/214

PR: https://git.openjdk.java.net/jdk17/pull/214