git: openjdk/jdk: master: 8342692: C2: long counted loop/long range checks: don't create loop-nest for short running loops

[Roland Westrelin]

Changeset: f1556611
Branch: master
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-07-22 08:35:36 +0000
URL:       https://git.openjdk.org/jdk/commit/f155661151fc25cde3be17878aeb24056555961c

8342692: C2: long counted loop/long range checks: don't create loop-nest for short running loops

Co-authored-by: Maurizio Cimadamore <mcimadamore at openjdk.org>
Co-authored-by: Christian Hagedorn <chagedorn at openjdk.org>
Reviewed-by: chagedorn, thartmann

! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/opto/c2_globals.hpp
! src/hotspot/share/opto/castnode.cpp
! src/hotspot/share/opto/castnode.hpp
! src/hotspot/share/opto/graphKit.cpp
! src/hotspot/share/opto/ifnode.cpp
! src/hotspot/share/opto/loopPredicate.cpp
! src/hotspot/share/opto/loopTransform.cpp
! src/hotspot/share/opto/loopnode.cpp
! src/hotspot/share/opto/loopnode.hpp
! src/hotspot/share/opto/predicates.cpp
! src/hotspot/share/opto/predicates.hpp
! src/hotspot/share/runtime/deoptimization.cpp
! src/hotspot/share/runtime/deoptimization.hpp
! src/hotspot/share/runtime/vmStructs.cpp
! src/hotspot/share/utilities/globalDefinitions.hpp
! test/hotspot/jtreg/compiler/c2/irTests/TestLongRangeChecks.java
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestShortLoopLostLimit.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestShortRunningIntLoopWithLongChecksPredicates.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestShortRunningLongCountedLoop.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestShortRunningLongCountedLoopPredicatesClone.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestShortRunningLongCountedLoopScaleOverflow.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestShortRunningLongCountedLoopVectorization.java
+ test/hotspot/jtreg/compiler/longcountedloops/TestStressShortRunningLongCountedLoop.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestMemorySegment.java
+ test/micro/org/openjdk/bench/java/lang/foreign/HeapMismatchManualLoopTest.java