git: openjdk/jdk: jdk24: 8347554: [BACKOUT] C2: implement optimization for series of Add of unique value

[Christian Hagedorn]

Changeset: f42e2c10
Branch: jdk24
Author:    Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-01-14 15:20:53 +0000
URL:       https://git.openjdk.org/jdk/commit/f42e2c10c6f3e0f17bf9ada10dea0b98a29a39c8

8347554: [BACKOUT] C2: implement optimization for series of Add of unique value

Reviewed-by: kvn, thartmann
Backport-of: 062f2dcfe5b62cc3dd3c292eeebd7a7ac78f849a

! src/hotspot/share/opto/addnode.cpp
! src/hotspot/share/opto/addnode.hpp
- test/hotspot/jtreg/compiler/c2/TestSerialAdditions.java