[jdk17u-dev] RFR: 8315377: C2: assert(u->find_out_with(Op_AddP) == nullptr) failed: more than 2 chained AddP nodes?

Wed Oct 4 08:30:48 UTC 2023

I backport this for parity with 17.0.10-oracle.

I had to resolve loopnode.hpp. Trivial.

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Commit messages:
 - Backport ba1a46392f0b9c77c64278f82513aaf51f5c9b1b

Changes: https://git.openjdk.org/jdk17u-dev/pull/1829/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1829&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315377
  Stats: 106 lines in 3 files changed: 94 ins; 6 del; 6 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1829.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1829/head:pull/1829

PR: https://git.openjdk.org/jdk17u-dev/pull/1829