Clean backout of [JDK-8377882](https://bugs.openjdk.org/browse/JDK-8377882).
Thanks, Tobias ------------- Commit messages: - Revert "8377881: [lworld] OptimizePtrCompare is too conservative" Changes: https://git.openjdk.org/valhalla/pull/2232/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2232&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8380191 Stats: 279 lines in 4 files changed: 19 ins; 244 del; 16 mod Patch: https://git.openjdk.org/valhalla/pull/2232.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2232/head:pull/2232 PR: https://git.openjdk.org/valhalla/pull/2232
