git: openjdk/jdk: jdk26: 8371603: C2: Missing Ideal optimizations for load and store vectors on SVE

[Xiaohong Gong]

Changeset: b0ad3318
Branch: jdk26
Author:    Xiaohong Gong <xgong at openjdk.org>
Date:      2025-12-11 02:53:01 +0000
URL:       https://git.openjdk.org/jdk/commit/b0ad3318092bd1a109612d3ef14ae057bd667c50

8371603: C2: Missing Ideal optimizations for load and store vectors on SVE

Reviewed-by: epeter, erfang
Backport-of: b6732d6048259de68a3dd5b4f66ac82f87270404

! src/hotspot/cpu/aarch64/aarch64_vector.ad
! src/hotspot/cpu/aarch64/aarch64_vector_ad.m4
! src/hotspot/share/opto/matcher.hpp
! src/hotspot/share/opto/vectornode.cpp
! src/hotspot/share/opto/vectornode.hpp
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorLoadStoreOptimization.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorOperationsWithPartialSize.java