[jdk17u-dev] RFR: 8287217: C2: PhaseCCP: remove not visited nodes, prevent type inconsistency

Thu Dec 22 15:55:30 UTC 2022

I backport this for parity with 17.0.7-oracle. 

I needed to resolve around phaseX.cpp:1770 because JDK-8289051: C2: Cleanup PhaseCCP::analyze() 
is not in 17.

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Commit messages:
 - Backport 379f3094db0b8afe90ed6b7a341164222744085f

Changes: https://git.openjdk.org/jdk17u-dev/pull/976/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=976&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287217
  Stats: 102 lines in 5 files changed: 81 ins; 2 del; 19 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/976.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/976/head:pull/976

PR: https://git.openjdk.org/jdk17u-dev/pull/976