git: openjdk/jdk: master: 8357726: Improve C2 to recognize counted loops with multiple casts in trip counter

[Xiaohong Gong]

Changeset: 7d6c902c
Branch: master
Author:    Xiaohong Gong <xgong at openjdk.org>
Date:      2025-06-25 01:16:08 +0000
URL:       https://git.openjdk.org/jdk/commit/7d6c902ce8ffb9b42c264ecff56d4b54206e101b

8357726: Improve C2 to recognize counted loops with multiple casts in trip counter

Reviewed-by: chagedorn, epeter, galder

! src/hotspot/share/opto/loopnode.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestCountedLoopCastIV.java
+ test/micro/org/openjdk/bench/vm/compiler/CountedLoopCastIV.java