git: openjdk/jdk: master: 8375038: C2: Enforce that Ideal() returns the root of the subgraph if any change was made by checking the node hash

[Benoît Maillard]

Changeset: 56afb460
Branch: master
Author:    Benoît Maillard <bmaillard at openjdk.org>
Date:      2026-02-11 08:27:48 +0000
URL:       https://git.openjdk.org/jdk/commit/56afb460a0055206a1deb1260f6440de9d437acb

8375038: C2: Enforce that Ideal() returns the root of the subgraph if any change was made by checking the node hash

Reviewed-by: qamai, mchevalier

! src/hotspot/share/opto/c2_globals.hpp
! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/intrinsicnode.cpp
! src/hotspot/share/opto/node.cpp
! src/hotspot/share/opto/phaseX.cpp
! src/hotspot/share/opto/phaseX.hpp
! src/hotspot/share/runtime/flags/jvmFlagConstraintsCompiler.cpp
! test/hotspot/jtreg/compiler/c2/TestVerifyIterativeGVN.java