8362193: Re-work MacOS/AArch64 SpinPause to handle SB

Reviewed-by: shade, aph

.github/actions/build-jtreg/action.yml

@@ -65,4 +65,4 @@ runs:
       with:
         name: bundles-jtreg-${{ steps.version.outputs.value }}
         path: jtreg/installed
-        retention-days: 1
+        retention-days: 5

.github/actions/get-bundles/action.yml

@@ -32,10 +32,16 @@ inputs:
   debug-suffix:
     description: 'File name suffix denoting debug level, possibly empty'
     required: false
+  static-suffix:
+    description: 'Static bundle file name suffix'
+    required: false
 outputs:
   jdk-path:
     description: 'Path to the installed JDK bundle'
     value: ${{ steps.path-name.outputs.jdk }}
+  static-jdk-path:
+    description: 'Path to the installed static JDK bundle'
+    value: ${{ steps.path-name.outputs.static_jdk }}
   symbols-path:
     description: 'Path to the installed symbols bundle'
     value: ${{ steps.path-name.outputs.symbols }}
@@ -61,6 +67,15 @@ runs:
         path: bundles
       if: steps.download-bundles.outcome == 'failure'
 
+    - name: 'Download static bundles artifact'
+      id: download-static-bundles
+      uses: actions/download-artifact@v4
+      with:
+        name: bundles-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}
+        path: bundles
+      continue-on-error: true
+      if: ${{ inputs.static-suffix == '-static' }}
+
     - name: 'Unpack bundles'
       run: |
         if [[ -e bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}.zip ]]; then
@@ -75,6 +90,20 @@ runs:
           tar -xf bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}.tar.gz -C bundles/jdk
         fi
 
+        if [[ '${{ inputs.static-suffix }}' == '-static' ]]; then
+          if [[ -e bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}.zip ]]; then
+            echo 'Unpacking static jdk bundle...'
+            mkdir -p bundles/static-jdk
+            unzip -q bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}.zip -d bundles/static-jdk
+          fi
+
+          if [[ -e bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}.tar.gz ]]; then
+            echo 'Unpacking static jdk bundle...'
+            mkdir -p bundles/static-jdk
+            tar -xf bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}.tar.gz -C bundles/static-jdk
+          fi
+        fi
+
         if [[ -e bundles/symbols-${{ inputs.platform }}${{ inputs.debug-suffix }}.tar.gz ]]; then
           echo 'Unpacking symbols bundle...'
           mkdir -p bundles/symbols
@@ -106,4 +135,12 @@ runs:
         echo "jdk=$jdk_dir" >> $GITHUB_OUTPUT
         echo "symbols=$symbols_dir" >> $GITHUB_OUTPUT
         echo "tests=$tests_dir" >> $GITHUB_OUTPUT
+
+        if [[ '${{ inputs.static-suffix }}' == '-static' ]]; then
+          static_jdk_dir="$GITHUB_WORKSPACE/$(dirname $(find bundles/static-jdk -name bin -type d))"
+          if [[ '${{ runner.os }}' == 'Windows' ]]; then
+            static_jdk_dir="$(cygpath $static_jdk_dir)"
+          fi
+          echo "static_jdk=$static_jdk_dir" >> $GITHUB_OUTPUT
+        fi
       shell: bash

.github/actions/upload-bundles/action.yml

@@ -35,6 +35,9 @@ inputs:
   bundle-suffix:
     description: 'Bundle name suffix, possibly empty'
     required: false
+  static-suffix:
+    description: 'Static JDK bundle name suffix, possibly empty'
+    required: false
 
 runs:
   using: composite
@@ -46,6 +49,8 @@ runs:
         # Rename bundles to consistent names
         jdk_bundle_zip="$(ls build/*/bundles/jdk-*_bin${{ inputs.debug-suffix }}.zip 2> /dev/null || true)"
         jdk_bundle_tar_gz="$(ls build/*/bundles/jdk-*_bin${{ inputs.debug-suffix }}.tar.gz 2> /dev/null || true)"
+        static_jdk_bundle_zip="$(ls build/*/bundles/static-jdk-*_bin${{ inputs.debug-suffix }}.zip 2> /dev/null || true)"
+        static_jdk_bundle_tar_gz="$(ls build/*/bundles/static-jdk-*_bin${{ inputs.debug-suffix }}.tar.gz 2> /dev/null || true)"
         symbols_bundle="$(ls build/*/bundles/jdk-*_bin${{ inputs.debug-suffix }}-symbols.tar.gz 2> /dev/null || true)"
         tests_bundle="$(ls build/*/bundles/jdk-*_bin-tests${{ inputs.debug-suffix }}.tar.gz 2> /dev/null || true)"
         static_libs_bundle="$(ls build/*/bundles/jdk-*_bin-static-libs${{ inputs.debug-suffix }}.tar.gz 2> /dev/null || true)"
@@ -58,6 +63,12 @@ runs:
         if [[ "$jdk_bundle_tar_gz" != "" ]]; then
           mv "$jdk_bundle_tar_gz" "bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}.tar.gz"
         fi
+        if [[ "$static_jdk_bundle_zip" != "" ]]; then
+          mv "$static_jdk_bundle_zip" "bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}.zip"
+        fi
+        if [[ "$static_jdk_bundle_tar_gz" != "" ]]; then
+          mv "$static_jdk_bundle_tar_gz" "bundles/jdk-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}.tar.gz"
+        fi
         if [[ "$symbols_bundle" != "" ]]; then
           mv "$symbols_bundle" "bundles/symbols-${{ inputs.platform }}${{ inputs.debug-suffix }}.tar.gz"
         fi
@@ -68,7 +79,7 @@ runs:
           mv "$static_libs_bundle" "bundles/static-libs-${{ inputs.platform }}${{ inputs.debug-suffix }}.tar.gz"
         fi
 
-        if [[ "$jdk_bundle_zip$jdk_bundle_tar_gz$symbols_bundle$tests_bundle$static_libs_bundle" != "" ]]; then
+        if [[ "$jdk_bundle_zip$jdk_bundle_tar_gz$static_jdk_bundle_zip$static_jdk_bundle_tar_gz$symbols_bundle$tests_bundle$static_libs_bundle" != "" ]]; then
           echo 'bundles-found=true' >> $GITHUB_OUTPUT
         else
           echo 'bundles-found=false' >> $GITHUB_OUTPUT
@@ -78,7 +89,7 @@ runs:
     - name: 'Upload bundles artifact'
       uses: actions/upload-artifact@v4
       with:
-        name: bundles-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.bundle-suffix }}
+        name: bundles-${{ inputs.platform }}${{ inputs.debug-suffix }}${{ inputs.static-suffix }}${{ inputs.bundle-suffix }}
         path: bundles
-        retention-days: 1
+        retention-days: 5
       if: steps.bundles.outputs.bundles-found == 'true'

.github/workflows/build-alpine-linux.yml

@@ -51,6 +51,10 @@ on:
       make-arguments:
         required: false
         type: string
+      dry-run:
+        required: false
+        type: boolean
+        default: false
 
 jobs:
   build-linux:
@@ -104,9 +108,11 @@ jobs:
           make-target: '${{ inputs.make-target }} ${{ inputs.make-arguments }}'
           platform: ${{ inputs.platform }}
           debug-suffix: '${{ matrix.suffix }}'
+        if: ${{ inputs.dry-run == false }}
 
       - name: 'Upload bundles'
         uses: ./.github/actions/upload-bundles
         with:
           platform: ${{ inputs.platform }}
           debug-suffix: '${{ matrix.suffix }}'
+        if: ${{ inputs.dry-run == false }}

.github/workflows/build-cross-compile.yml

@@ -40,6 +40,10 @@ on:
       make-arguments:
         required: false
         type: string
+      dry-run:
+        required: false
+        type: boolean
+        default: false
 
 jobs:
   build-cross-compile:
@@ -189,4 +193,4 @@ jobs:
         with:
           make-target: 'hotspot ${{ inputs.make-arguments }}'
           platform: linux-${{ matrix.target-cpu }}
-        if: steps.create-sysroot.outcome == 'success' || steps.get-cached-sysroot.outputs.cache-hit == 'true'
+        if: ((steps.create-sysroot.outcome == 'success' || steps.get-cached-sysroot.outputs.cache-hit == 'true') && inputs.dry-run == false)

.github/workflows/build-linux.yml

@@ -61,9 +61,16 @@ on:
       make-arguments:
         required: false
         type: string
+      dry-run:
+        required: false
+        type: boolean
+        default: false
       bundle-suffix:
         required: false
         type: string
+      static-suffix:
+        required: false
+        type: string
 
 jobs:
   build-linux:
@@ -136,6 +143,7 @@ jobs:
           make-target: '${{ inputs.make-target }} ${{ inputs.make-arguments }}'
           platform: ${{ inputs.platform }}
           debug-suffix: "${{ matrix.debug-level == 'debug' && '-debug' || '' }}"
+        if: ${{ inputs.dry-run == false }}
 
       - name: 'Upload bundles'
         uses: ./.github/actions/upload-bundles
@@ -143,3 +151,5 @@ jobs:
           platform: ${{ inputs.platform }}
           debug-suffix: "${{ matrix.debug-level == 'debug' && '-debug' || '' }}"
           bundle-suffix: ${{ inputs.bundle-suffix }}
+          static-suffix: ${{ inputs.static-suffix }}
+        if: ${{ inputs.dry-run == false }}

.github/workflows/build-macos.yml

@@ -54,6 +54,10 @@ on:
       make-arguments:
         required: false
         type: string
+      dry-run:
+        required: false
+        type: boolean
+        default: false
 
 jobs:
   build-macos:
@@ -118,9 +122,11 @@ jobs:
           make-target: '${{ inputs.make-target }} ${{ inputs.make-arguments }}'
           platform: ${{ inputs.platform }}
           debug-suffix: '${{ matrix.suffix }}'
+        if: ${{ inputs.dry-run == false }}
 
       - name: 'Upload bundles'
         uses: ./.github/actions/upload-bundles
         with:
           platform: ${{ inputs.platform }}
           debug-suffix: '${{ matrix.suffix }}'
+        if: ${{ inputs.dry-run == false }}

.github/workflows/build-windows.yml

@@ -54,6 +54,10 @@ on:
       make-arguments:
         required: false
         type: string
+      dry-run:
+        required: false
+        type: boolean
+        default: false
 
 env:
   # These are needed to make the MSYS2 bash work properly
@@ -63,7 +67,7 @@ env:
 jobs:
   build-windows:
     name: build
-    runs-on: windows-2019
+    runs-on: windows-2025
     defaults:
       run:
         shell: bash
@@ -102,7 +106,7 @@ jobs:
         id: toolchain-check
         run: |
           set +e
-          '/c/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/vc/auxiliary/build/vcvars64.bat' -vcvars_ver=${{ inputs.msvc-toolset-version }}
+          '/c/Program Files/Microsoft Visual Studio/2022/Enterprise/vc/auxiliary/build/vcvars64.bat' -vcvars_ver=${{ inputs.msvc-toolset-version }}
           if [ $? -eq 0 ]; then
             echo "Toolchain is already installed"
             echo "toolchain-installed=true" >> $GITHUB_OUTPUT
@@ -115,7 +119,7 @@ jobs:
         run: |
           # Run Visual Studio Installer
           '/c/Program Files (x86)/Microsoft Visual Studio/Installer/vs_installer.exe' \
-            modify --quiet --installPath 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise' \
+            modify --quiet --installPath 'C:\Program Files\Microsoft Visual Studio\2022\Enterprise' \
             --add Microsoft.VisualStudio.Component.VC.${{ inputs.msvc-toolset-version }}.${{ inputs.msvc-toolset-architecture }}
         if: steps.toolchain-check.outputs.toolchain-installed != 'true'
 
@@ -139,6 +143,7 @@ jobs:
           # Set PATH to "", so just GITHUB_PATH is included
           PATH: ''
         shell: env /usr/bin/bash --login -eo pipefail {0}
+        if: ${{ inputs.dry-run == false }}
 
       - name: 'Build'
         id: build
@@ -147,9 +152,11 @@ jobs:
           make-target: '${{ inputs.make-target }} ${{ inputs.make-arguments }}'
           platform: ${{ inputs.platform }}
           debug-suffix: '${{ matrix.suffix }}'
+        if: ${{ inputs.dry-run == false }}
 
       - name: 'Upload bundles'
         uses: ./.github/actions/upload-bundles
         with:
           platform: ${{ inputs.platform }}
           debug-suffix: '${{ matrix.suffix }}'
+        if: ${{ inputs.dry-run == false }}

.github/workflows/main.yml

@@ -28,9 +28,7 @@ name: 'OpenJDK GHA Sanity Checks'
 on:
   push:
     branches-ignore:
-      - master
       - pr/*
-      - jdk*
   workflow_dispatch:
     inputs:
       platforms:
@@ -43,6 +41,9 @@ on:
       make-arguments:
         description: 'Additional make arguments'
         required: false
+      dry-run:
+        description: 'Dry run: skip actual builds and tests'
+        required: false
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -70,6 +71,7 @@ jobs:
       windows-x64: ${{ steps.include.outputs.windows-x64 }}
       windows-aarch64: ${{ steps.include.outputs.windows-aarch64 }}
       docs: ${{ steps.include.outputs.docs }}
+      dry-run: ${{ steps.include.outputs.dry-run }}
 
     steps:
       - name: 'Checkout the scripts'
@@ -143,6 +145,35 @@ jobs:
             echo 'false'
           }
 
+          function check_dry_run() {
+            if [[ $GITHUB_EVENT_NAME == workflow_dispatch ]]; then
+              # Take the user-specified one.
+              echo '${{ github.event.inputs.dry-run }}'
+              return
+            elif [[ $GITHUB_EVENT_NAME == push ]]; then
+              # Cut out the real branch name
+              BRANCH=${GITHUB_REF##*/}
+
+              # Dry run rebuilds the caches in current branch, so they can be reused
+              # for any child PR branches. Because of this, we want to trigger this
+              # workflow in master branch, so that actual PR branches can use the cache.
+              # This workflow would trigger every time contributors sync their master
+              # branches in their personal forks.
+              if [[ $BRANCH == "master" ]]; then
+                echo 'true'
+                return
+              fi
+
+              # ...same for stabilization branches
+              if [[ $BRANCH =~ "jdk(.*)" ]]; then
+                echo 'true'
+                return
+              fi
+            fi
+
+            echo 'false'
+          }
+
           echo "linux-x64=$(check_platform linux-x64 linux x64)" >> $GITHUB_OUTPUT
           echo "linux-x64-variants=$(check_platform linux-x64-variants variants)" >> $GITHUB_OUTPUT
           echo "linux-cross-compile=$(check_platform linux-cross-compile cross-compile)" >> $GITHUB_OUTPUT
@@ -152,6 +183,7 @@ jobs:
           echo "windows-x64=$(check_platform windows-x64 windows x64)" >> $GITHUB_OUTPUT
           echo "windows-aarch64=$(check_platform windows-aarch64 windows aarch64)" >> $GITHUB_OUTPUT
           echo "docs=$(check_platform docs)" >> $GITHUB_OUTPUT
+          echo "dry-run=$(check_dry_run)" >> $GITHUB_OUTPUT
 
   ###
   ### Build jobs
@@ -166,6 +198,7 @@ jobs:
       gcc-major-version: '10'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.linux-x64 == 'true'
 
   build-linux-x64-hs-nopch:
@@ -180,6 +213,7 @@ jobs:
       extra-conf-options: '--disable-precompiled-headers'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.linux-x64-variants == 'true'
 
   build-linux-x64-hs-zero:
@@ -194,6 +228,7 @@ jobs:
       extra-conf-options: '--with-jvm-variants=zero --disable-precompiled-headers'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.linux-x64-variants == 'true'
 
   build-linux-x64-hs-minimal:
@@ -208,6 +243,7 @@ jobs:
       extra-conf-options: '--with-jvm-variants=minimal --disable-precompiled-headers'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.linux-x64-variants == 'true'
 
   build-linux-x64-hs-optimized:
@@ -223,6 +259,7 @@ jobs:
       extra-conf-options: '--with-debug-level=optimized --disable-precompiled-headers'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.linux-x64-variants == 'true'
 
   build-linux-x64-static:
@@ -231,16 +268,15 @@ jobs:
     uses: ./.github/workflows/build-linux.yml
     with:
       platform: linux-x64
-      make-target: 'static-jdk-image'
+      make-target: 'static-jdk-bundles'
       # There are issues with fastdebug static build in GHA due to space limit.
       # Only do release build for now.
       debug-levels: '[ "release" ]'
       gcc-major-version: '10'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
-      # It currently doesn't produce any bundles, but probably will do in
-      # the future.
-      bundle-suffix: "-static"
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
+      static-suffix: "-static"
     if: needs.prepare.outputs.linux-x64 == 'true'
 
   build-linux-x64-static-libs:
@@ -256,6 +292,7 @@ jobs:
       gcc-major-version: '10'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
       # Upload static libs bundles separately to avoid interference with normal linux-x64 bundle.
       # This bundle is not used by testing jobs, but downstreams use it to check that
       # dependent projects, e.g. libgraal, builds fine.
@@ -270,6 +307,7 @@ jobs:
       gcc-major-version: '10'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.linux-cross-compile == 'true'
 
   build-alpine-linux-x64:
@@ -280,6 +318,7 @@ jobs:
       platform: alpine-linux-x64
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.alpine-linux-x64 == 'true'
 
   build-macos-x64:
@@ -292,6 +331,7 @@ jobs:
       xcode-toolset-version: '14.3.1'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.macos-x64 == 'true'
 
   build-macos-aarch64:
@@ -304,6 +344,7 @@ jobs:
       xcode-toolset-version: '15.4'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.macos-aarch64 == 'true'
 
   build-windows-x64:
@@ -312,10 +353,11 @@ jobs:
     uses: ./.github/workflows/build-windows.yml
     with:
       platform: windows-x64
-      msvc-toolset-version: '14.29'
+      msvc-toolset-version: '14.44'
       msvc-toolset-architecture: 'x86.x64'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.windows-x64 == 'true'
 
   build-windows-aarch64:
@@ -324,12 +366,13 @@ jobs:
     uses: ./.github/workflows/build-windows.yml
     with:
       platform: windows-aarch64
-      msvc-toolset-version: '14.29'
+      msvc-toolset-version: '14.44'
       msvc-toolset-architecture: 'arm64'
       make-target: 'hotspot'
       extra-conf-options: '--openjdk-target=aarch64-unknown-cygwin'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.windows-aarch64 == 'true'
 
   build-docs:
@@ -346,6 +389,7 @@ jobs:
       gcc-major-version: '10'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
     if: needs.prepare.outputs.docs == 'true'
 
   ###
@@ -355,30 +399,53 @@ jobs:
   test-linux-x64:
     name: linux-x64
     needs:
+      - prepare
       - build-linux-x64
     uses: ./.github/workflows/test.yml
     with:
       platform: linux-x64
       bootjdk-platform: linux-x64
       runs-on: ubuntu-22.04
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
+      debug-suffix: -debug
+
+  test-linux-x64-static:
+    name: linux-x64-static
+    needs:
+      - prepare
+      - build-linux-x64
+      - build-linux-x64-static
+    uses: ./.github/workflows/test.yml
+    with:
+      platform: linux-x64
+      bootjdk-platform: linux-x64
+      runs-on: ubuntu-22.04
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
+      static-suffix: "-static"
 
   test-macos-aarch64:
     name: macos-aarch64
     needs:
+      - prepare
       - build-macos-aarch64
     uses: ./.github/workflows/test.yml
     with:
       platform: macos-aarch64
       bootjdk-platform: macos-aarch64
       runs-on: macos-14
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
       xcode-toolset-version: '15.4'
+      debug-suffix: -debug
 
   test-windows-x64:
     name: windows-x64
     needs:
+      - prepare
       - build-windows-x64
     uses: ./.github/workflows/test.yml
     with:
       platform: windows-x64
       bootjdk-platform: windows-x64
-      runs-on: windows-2019
+      runs-on: windows-2025
+      dry-run: ${{ needs.prepare.outputs.dry-run == 'true' }}
+      debug-suffix: -debug

.github/workflows/test.yml

@@ -40,6 +40,16 @@ on:
       xcode-toolset-version:
         required: false
         type: string
+      dry-run:
+        required: false
+        type: boolean
+        default: false
+      debug-suffix:
+        required: false
+        type: string
+      static-suffix:
+        required: false
+        type: string
 
 env:
   # These are needed to make the MSYS2 bash work properly
@@ -86,35 +96,35 @@ jobs:
 
           - test-name: 'hs/tier1 common'
             test-suite: 'test/hotspot/jtreg/:tier1_common'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'hs/tier1 compiler part 1'
             test-suite: 'test/hotspot/jtreg/:tier1_compiler_1'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'hs/tier1 compiler part 2'
             test-suite: 'test/hotspot/jtreg/:tier1_compiler_2'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'hs/tier1 compiler part 3'
             test-suite: 'test/hotspot/jtreg/:tier1_compiler_3'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'hs/tier1 gc'
             test-suite: 'test/hotspot/jtreg/:tier1_gc'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'hs/tier1 runtime'
             test-suite: 'test/hotspot/jtreg/:tier1_runtime'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'hs/tier1 serviceability'
             test-suite: 'test/hotspot/jtreg/:tier1_serviceability'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
           - test-name: 'lib-test/tier1'
             test-suite: 'test/lib-test/:tier1'
-            debug-suffix: -debug
+            debug-suffix: ${{ inputs.debug-suffix }}
 
     steps:
       - name: 'Checkout the JDK source'
@@ -140,6 +150,8 @@ jobs:
         with:
           platform: ${{ inputs.platform }}
           debug-suffix: ${{ matrix.debug-suffix }}
+          static-suffix: ${{ inputs.static-suffix }}
+        if: ${{ inputs.dry-run == false }}
 
       - name: 'Install dependencies'
         run: |
@@ -160,6 +172,21 @@ jobs:
           else
             echo "value=$PATH" >> $GITHUB_OUTPUT
           fi
+          if [[ '${{ inputs.static-suffix }}' == '-static' ]]; then
+            echo "static-hotspot-problemlist-path=`pwd`/test/hotspot/jtreg/ProblemList-StaticJdk.txt" >> $GITHUB_OUTPUT
+            echo "static-jdk-problemlist-path=`pwd`/test/jdk/ProblemList-StaticJdk.txt" >> $GITHUB_OUTPUT
+            echo "static-langtools-problemlist-path=`pwd`/test/langtools/ProblemList-StaticJdk.txt" >> $GITHUB_OUTPUT
+            echo "static-lib-test-problemlist-path=`pwd`/test/lib-test/ProblemList-StaticJdk.txt" >> $GITHUB_OUTPUT
+          fi
+
+      - name: 'Set Extra Options'
+        id: extra-options
+        run: |
+          if [[ '${{ inputs.static-suffix }}' == '-static' ]]; then
+            echo "test-jdk=JDK_UNDER_TEST=${{ steps.bundles.outputs.static-jdk-path }}" >> $GITHUB_OUTPUT
+            echo "compile-jdk=JDK_FOR_COMPILE=${{ steps.bundles.outputs.jdk-path }}" >> $GITHUB_OUTPUT
+            echo "extra-problem-lists=EXTRA_PROBLEM_LISTS=${{ steps.path.outputs.static-hotspot-problemlist-path }}%20${{ steps.path.outputs.static-jdk-problemlist-path }}%20${{ steps.path.outputs.static-langtools-problemlist-path }}%20${{ steps.path.outputs.static-lib-test-problemlist-path }}" >> $GITHUB_OUTPUT
+          fi
 
       - name: 'Run tests'
         id: run-tests
@@ -171,10 +198,13 @@ jobs:
           JDK_IMAGE_DIR=${{ steps.bundles.outputs.jdk-path }}
           SYMBOLS_IMAGE_DIR=${{ steps.bundles.outputs.symbols-path }}
           TEST_IMAGE_DIR=${{ steps.bundles.outputs.tests-path }}
-          JTREG='JAVA_OPTIONS=-XX:-CreateCoredumpOnCrash;VERBOSE=fail,error,time;KEYWORDS=!headful'
+          ${{ steps.extra-options.outputs.test-jdk }}
+          ${{ steps.extra-options.outputs.compile-jdk }}
+          JTREG='JAVA_OPTIONS=-XX:-CreateCoredumpOnCrash;VERBOSE=fail,error,time;KEYWORDS=!headful;${{ steps.extra-options.outputs.extra-problem-lists }}'
           && bash ./.github/scripts/gen-test-summary.sh "$GITHUB_STEP_SUMMARY" "$GITHUB_OUTPUT"
         env:
           PATH: ${{ steps.path.outputs.value }}
+        if: ${{ inputs.dry-run == false }}
 
         # This is a separate step, since if the markdown from a step gets bigger than
         # 1024 kB it is skipped, but then the short summary above is still generated
@@ -204,7 +234,7 @@ jobs:
             echo '::warning ::Missing test-support directory'
           fi
 
-          artifact_name="results-${{ inputs.platform }}-$(echo ${{ matrix.test-name }} | tr '/ ' '__')"
+          artifact_name="results-${{ inputs.platform }}-$(echo ${{ matrix.test-name }}${{ inputs.static-suffix }} | tr '/ ' '__')"
           echo "artifact-name=$artifact_name" >> $GITHUB_OUTPUT
         if: always()
 

.gitignore

@@ -23,3 +23,5 @@ NashornProfile.txt
 /.gdbinit
 /.lldbinit
 **/core.[0-9]*
+*.rej
+*.orig

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
 project=jdk
 jbs=JDK
-version=25
+version=26
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists,copyright

doc/hotspot-style.html

@@ -77,6 +77,9 @@ SFINAE</a></li>
 <li><a href="#thread_local" id="toc-thread_local">thread_local</a></li>
 <li><a href="#nullptr" id="toc-nullptr">nullptr</a></li>
 <li><a href="#atomic" id="toc-atomic">&lt;atomic&gt;</a></li>
+<li><a href="#initializing-variables-with-static-storage-duration"
+id="toc-initializing-variables-with-static-storage-duration">Initializing
+variables with static storage duration</a></li>
 <li><a href="#uniform-initialization"
 id="toc-uniform-initialization">Uniform Initialization</a></li>
 <li><a href="#local-function-objects"
@@ -84,6 +87,7 @@ id="toc-local-function-objects">Local Function Objects</a></li>
 <li><a href="#inheriting-constructors"
 id="toc-inheriting-constructors">Inheriting constructors</a></li>
 <li><a href="#attributes" id="toc-attributes">Attributes</a></li>
+<li><a href="#noexcept" id="toc-noexcept">noexcept</a></li>
 <li><a href="#additional-permitted-features"
 id="toc-additional-permitted-features">Additional Permitted
 Features</a></li>
@@ -791,6 +795,33 @@ differ from what the Java compilers implement.</p>
 "conservative" memory ordering, which may differ from (may be stronger
 than) sequentially consistent. There are algorithms in HotSpot that are
 believed to rely on that ordering.</p>
+<h3
+id="initializing-variables-with-static-storage-duration">Initializing
+variables with static storage duration</h3>
+<p>Variables with static storage duration and <em>dynamic
+initialization</em> <a
+href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4296.pdf">C++14
+3.6.2</a>). should be avoided, unless an implementation is permitted to
+perform the initialization as a static initialization. The order in
+which dynamic initializations occur is incompletely specified.
+Initialization order problems can be difficult to deal with and lead to
+surprises.</p>
+<p>Variables with static storage duration and non-trivial destructors
+should be avoided. HotSpot doesn't generally try to cleanup on exit, and
+running destructors at exit can lead to problems.</p>
+<p>Some of the approaches used in HotSpot to avoid dynamic
+initialization include:</p>
+<ul>
+<li><p>Use the <code>Deferred&lt;T&gt;</code> class template. Add a call
+to its initialization function at an appropriate place during VM
+initialization. The underlying object is never destroyed.</p></li>
+<li><p>For objects of class type, use a variable whose value is a
+pointer to the class, initialized to <code>nullptr</code>. Provide an
+initialization function that sets the variable to a dynamically
+allocated object. Add a call to that function at an appropriate place
+during VM initialization. Such objects are usually never
+destroyed.</p></li>
+</ul>
 <h3 id="uniform-initialization">Uniform Initialization</h3>
 <p>The use of <em>uniform initialization</em> (<a
 href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2672.htm">n2672</a>),
@@ -1110,6 +1141,58 @@ function name and the parameter list.</li>
 <code>memory_order_consume</code>.</li>
 <li><code>[[deprecated]]</code> - Not relevant in HotSpot code.</li>
 </ul>
+<h3 id="noexcept">noexcept</h3>
+<p>Use of <code>noexcept</code> exception specifications (<a
+href="http://wg21.link/n3050">n3050</a>) are permitted with restrictions
+described below.</p>
+<ul>
+<li>Only the argument-less form of <code>noexcept</code> exception
+specifications are permitted.</li>
+<li>Allocation functions that may return <code>nullptr</code> to
+indicate allocation failure must be declared <code>noexcept</code>.</li>
+<li>All other uses of <code>noexcept</code> exception specifications are
+forbidden.</li>
+<li><code>noexcept</code> expressions are forbidden.</li>
+<li>Dynamic exception specifications are forbidden.</li>
+</ul>
+<p>HotSpot is built with exceptions disabled, e.g. compile with
+<code>-fno-exceptions</code> (gcc, clang) or no <code>/EH</code> option
+(MSVC++). So why do we need to consider <code>noexcept</code> at all?
+It's because <code>noexcept</code> exception specifications serve two
+distinct purposes.</p>
+<p>The first is to allow the compiler to avoid generating code or data
+in support of exceptions being thrown by a function. But this is
+unnecessary, because exceptions are disabled.</p>
+<p>The second is to allow the compiler and library code to choose
+different algorithms, depending on whether some function may throw
+exceptions. This is only relevant to a certain set of functions.</p>
+<ul>
+<li><p>Some allocation functions (<code>operator new</code> and
+<code>operator new[]</code>) return <code>nullptr</code> to indicate
+allocation failure. If a <code>new</code> expression calls such an
+allocation function, it must check for and handle that possibility.
+Declaring such a function <code>noexcept</code> informs the compiler
+that <code>nullptr</code> is a possible result. If an allocation
+function is not declared <code>noexcept</code> then the compiler may
+elide that checking and handling for a <code>new</code> expression
+calling that function.</p></li>
+<li><p>Certain Standard Library facilities (notably containers) provide
+different guarantees for some operations (and may choose different
+algorithms to implement those operations), depending on whether certain
+functions (constructors, copy/move operations, swap) are nothrow or not.
+They detect this using type traits that test whether a function is
+declared <code>noexcept</code>. This can have a significant performance
+impact if, for example, copying is chosen over a potentially throwing
+move. But this isn't relevant, since HotSpot forbids the use of most
+Standard Library facilities.</p></li>
+</ul>
+<p>HotSpot code can assume no exceptions will ever be thrown, even from
+functions not declared <code>noexcept</code>. So HotSpot code doesn't
+ever need to check, either with conditional exception specifications or
+with <code>noexcept</code> expressions.</p>
+<p>Dynamic exception specifications were deprecated in C++11. C++17
+removed all but <code>throw()</code>, with that remaining a deprecated
+equivalent to <code>noexcept</code>.</p>
 <h3 id="additional-permitted-features">Additional Permitted
 Features</h3>
 <ul>
@@ -1198,12 +1281,6 @@ Library names.</p></li>
 href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html">n2179</a>)
 — HotSpot does not permit the use of exceptions, so this feature isn't
 useful.</p></li>
-<li><p>Avoid non-local variables with non-constexpr initialization. In
-particular, avoid variables with types requiring non-trivial
-initialization or destruction. Initialization order problems can be
-difficult to deal with and lead to surprises, as can destruction
-ordering. HotSpot doesn't generally try to cleanup on exit, and running
-destructors at exit can also lead to problems.</p></li>
 <li><p>Avoid most operator overloading, preferring named functions. When
 operator overloading is used, ensure the semantics conform to the normal
 expected behavior of the operation.</p></li>

doc/hotspot-style.md

@@ -770,6 +770,32 @@ ordering, which may differ from (may be stronger than) sequentially
 consistent.  There are algorithms in HotSpot that are believed to rely
 on that ordering.
 
+### Initializing variables with static storage duration
+
+Variables with static storage duration and _dynamic initialization_
+[C++14 3.6.2](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4296.pdf)).
+should be avoided, unless an implementation is permitted to perform the
+initialization as a static initialization. The order in which dynamic
+initializations occur is incompletely specified.  Initialization order
+problems can be difficult to deal with and lead to surprises.
+
+Variables with static storage duration and non-trivial destructors should be
+avoided. HotSpot doesn't generally try to cleanup on exit, and running
+destructors at exit can lead to problems.
+
+Some of the approaches used in HotSpot to avoid dynamic initialization
+include:
+
+* Use the `Deferred<T>` class template. Add a call to its initialization
+function at an appropriate place during VM initialization. The underlying
+object is never destroyed.
+
+* For objects of class type, use a variable whose value is a pointer to the
+class, initialized to `nullptr`. Provide an initialization function that sets
+the variable to a dynamically allocated object. Add a call to that function at
+an appropriate place during VM initialization. Such objects are usually never
+destroyed.
+
 ### Uniform Initialization
 
 The use of _uniform initialization_
@@ -1104,6 +1130,57 @@ The following attributes are expressly forbidden:
 * `[[carries_dependency]]` - Related to `memory_order_consume`.
 * `[[deprecated]]` - Not relevant in HotSpot code.
 
+### noexcept
+
+Use of `noexcept` exception specifications
+([n3050](http://wg21.link/n3050))
+are permitted with restrictions described below.
+
+* Only the argument-less form of `noexcept` exception specifications are
+permitted.
+* Allocation functions that may return `nullptr` to indicate allocation
+failure must be declared `noexcept`.
+* All other uses of `noexcept` exception specifications are forbidden.
+* `noexcept` expressions are forbidden.
+* Dynamic exception specifications are forbidden.
+
+HotSpot is built with exceptions disabled, e.g. compile with `-fno-exceptions`
+(gcc, clang) or no `/EH` option (MSVC++). So why do we need to consider
+`noexcept` at all? It's because `noexcept` exception specifications serve two
+distinct purposes.
+
+The first is to allow the compiler to avoid generating code or data in support
+of exceptions being thrown by a function. But this is unnecessary, because
+exceptions are disabled.
+
+The second is to allow the compiler and library code to choose different
+algorithms, depending on whether some function may throw exceptions. This is
+only relevant to a certain set of functions.
+
+* Some allocation functions (`operator new` and `operator new[]`) return
+`nullptr` to indicate allocation failure. If a `new` expression calls such an
+allocation function, it must check for and handle that possibility. Declaring
+such a function `noexcept` informs the compiler that `nullptr` is a possible
+result. If an allocation function is not declared `noexcept` then the compiler
+may elide that checking and handling for a `new` expression calling that
+function.
+
+* Certain Standard Library facilities (notably containers) provide different
+guarantees for some operations (and may choose different algorithms to
+implement those operations), depending on whether certain functions
+(constructors, copy/move operations, swap) are nothrow or not. They detect
+this using type traits that test whether a function is declared `noexcept`.
+This can have a significant performance impact if, for example, copying is
+chosen over a potentially throwing move. But this isn't relevant, since
+HotSpot forbids the use of most Standard Library facilities.
+
+HotSpot code can assume no exceptions will ever be thrown, even from functions
+not declared `noexcept`. So HotSpot code doesn't ever need to check, either
+with conditional exception specifications or with `noexcept` expressions.
+
+Dynamic exception specifications were deprecated in C++11. C++17 removed all
+but `throw()`, with that remaining a deprecated equivalent to `noexcept`.
+
 ### Additional Permitted Features
 
 * `alignof`
@@ -1199,13 +1276,6 @@ namespace std;` to avoid needing to qualify Standard Library names.
 ([n2179](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html)) &mdash;
 HotSpot does not permit the use of exceptions, so this feature isn't useful.
 
-* Avoid non-local variables with non-constexpr initialization.
-In particular, avoid variables with types requiring non-trivial
-initialization or destruction.  Initialization order problems can be
-difficult to deal with and lead to surprises, as can destruction
-ordering.  HotSpot doesn't generally try to cleanup on exit, and
-running destructors at exit can also lead to problems.
-
 * Avoid most operator overloading, preferring named functions.  When
 operator overloading is used, ensure the semantics conform to the
 normal expected behavior of the operation.

doc/starting-next-release.html

@@ -0,0 +1,127 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="" xml:lang="">
+<head>
+  <meta charset="utf-8" />
+  <meta name="generator" content="pandoc" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
+  <title>Explanation of start of release changes</title>
+  <style>
+    code{white-space: pre-wrap;}
+    span.smallcaps{font-variant: small-caps;}
+    div.columns{display: flex; gap: min(4vw, 1.5em);}
+    div.column{flex: auto; overflow-x: auto;}
+    div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
+    /* The extra [class] is a hack that increases specificity enough to
+       override a similar rule in reveal.js */
+    ul.task-list[class]{list-style: none;}
+    ul.task-list li input[type="checkbox"] {
+      font-size: inherit;
+      width: 0.8em;
+      margin: 0 0.8em 0.2em -1.6em;
+      vertical-align: middle;
+    }
+    .display.math{display: block; text-align: center; margin: 0.5rem auto;}
+  </style>
+  <link rel="stylesheet" href="../make/data/docs-resources/resources/jdk-default.css" />
+  <!--[if lt IE 9]>
+    <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
+  <![endif]-->
+</head>
+<body>
+<header id="title-block-header">
+<h1 class="title">Explanation of start of release changes</h1>
+</header>
+<nav id="TOC" role="doc-toc">
+<ul>
+<li><a href="#overview" id="toc-overview">Overview</a></li>
+<li><a href="#details-and-file-updates"
+id="toc-details-and-file-updates">Details and file updates</a>
+<ul>
+<li><a href="#meta-data-files" id="toc-meta-data-files">Meta-data
+files</a></li>
+<li><a href="#src-files" id="toc-src-files"><code>src</code>
+files</a></li>
+<li><a href="#test-files" id="toc-test-files"><code>test</code>
+files</a></li>
+</ul></li>
+</ul>
+</nav>
+<h2 id="overview">Overview</h2>
+<p>The start of release changes, the changes that turn JDK <em>N</em>
+into JDK (<em>N</em>+1), are primarily small updates to various files
+along with new files to store symbol information to allow
+<code>javac --release N ...</code> to run on JDK (<em>N</em>+1).</p>
+<p>The updates include changes to files holding meta-data about the
+release, files under the <code>src</code> directory for API and tooling
+updates, and incidental updates under the <code>test</code>
+directory.</p>
+<h2 id="details-and-file-updates">Details and file updates</h2>
+<p>As a matter of policy, there are a number of semantically distinct
+concepts which get incremented separately at the start of a new
+release:</p>
+<ul>
+<li>Feature value of <code>Runtime.version()</code></li>
+<li>Highest source version modeled by
+<code>javax.lang.model.SourceVersion</code></li>
+<li>Highest class file format major version recognized by the
+platform</li>
+<li>Highest
+<code>-source</code>/<code>-target</code>/<code>--release</code>
+argument recognized by <code>javac</code> and related tools</li>
+</ul>
+<p>The expected file updates are listed below. Additional files may need
+to be updated for a particular release.</p>
+<h3 id="meta-data-files">Meta-data files</h3>
+<ul>
+<li><code>jcheck/conf</code>: update meta-data used by
+<code>jcheck</code> and the Skara tooling</li>
+<li><code>make/conf/version-numbers.conf</code>: update to meta-data
+used in the build</li>
+</ul>
+<h3 id="src-files"><code>src</code> files</h3>
+<ul>
+<li><code>src/hotspot/share/classfile/classFileParser.cpp</code>: add a
+<code>#define</code> for the new version</li>
+<li><code>src/java.base/share/classes/java/lang/classfile/ClassFile.java</code>:
+add a constant for the new class file format version</li>
+<li><code>src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java</code>:
+add an <code>enum</code> constant for the new class file format
+version</li>
+<li><code>src/java.compiler/share/classes/javax/lang/model/SourceVersion.java</code>:
+add an <code>enum</code> constant for the new source version</li>
+<li><code>src/java.compiler/share/classes/javax/lang/model/util/*</code>
+visitors: Update <code>@SupportedSourceVersion</code> annotations to
+latest value. Note this update is done in lieu of introducing another
+set of visitors for each Java SE release.</li>
+<li><code>src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java</code>:
+add an <code>enum</code> constant for the new source version internal to
+<code>javac</code></li>
+<li><code>src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassFile.java</code>:
+add an <code>enum</code> constant for the new class file format version
+internal to <code>javac</code></li>
+<li><code>src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java</code>:
+add an <code>enum</code> constant for the new target version internal to
+<code>javac</code></li>
+<li><code>src/jdk.compiler/share/classes/com/sun/tools/javac/processing/PrintingProcessor.java</code>
+update printing processor to support the new source version</li>
+<li>The symbol information for <code>--release</code> is stored as new
+text files in the <code>src/jdk.compiler/share/data/symbols</code>
+directory, one file per module. The README file in that directory
+contains directions on how to create the files.</li>
+</ul>
+<h3 id="test-files"><code>test</code> files</h3>
+<ul>
+<li><code>test/langtools/tools/javac/api/TestGetSourceVersions.java</code>:
+add new <code>SourceVersion</code> constant to test matrix.</li>
+<li><code>test/langtools/tools/javac/classfiles/ClassVersionChecker.java</code>:
+add new enum constant for the new class file version</li>
+<li><code>test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java</code>
+update annotation processor extended by <code>javac</code> tests to
+cover the new source version</li>
+<li><code>test/langtools/tools/javac/preview/classReaderTest/Client.nopreview.out</code>
+and
+<code>test/langtools/tools/javac/preview/classReaderTest/Client.preview.out</code>:
+update expected messages for preview errors and warnings</li>
+</ul>
+</body>
+</html>

doc/starting-next-release.md

@@ -0,0 +1,68 @@
+% Explanation of start of release changes
+
+## Overview
+
+The start of release changes, the changes that turn JDK _N_ into JDK
+(_N_+1), are primarily small updates to various files along with new files to
+store symbol information to allow `javac --release N ...` to run on
+JDK (_N_+1).
+
+The updates include changes to files holding meta-data about the
+release, files under the `src` directory for API and tooling updates,
+and incidental updates under the `test` directory.
+
+## Details and file updates
+
+As a matter of policy, there are a number of semantically distinct
+concepts which get incremented separately at the start of a new
+release:
+
+* Feature value of `Runtime.version()`
+* Highest source version modeled by `javax.lang.model.SourceVersion`
+* Highest class file format major version recognized by the platform
+* Highest `-source`/`-target`/`--release` argument recognized by
+  `javac` and related tools
+
+The expected file updates are listed below. Additional files may need
+to be updated for a particular release.
+
+### Meta-data files
+
+* `jcheck/conf`: update meta-data used by `jcheck` and the Skara tooling
+* `make/conf/version-numbers.conf`: update to meta-data used in the build
+
+### `src` files
+
+* `src/hotspot/share/classfile/classFileParser.cpp`: add a `#define`
+  for the new version
+* `src/java.base/share/classes/java/lang/classfile/ClassFile.java`:
+  add a constant for the new class file format version
+* `src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java`:
+   add an `enum` constant for the new class file format version
+* `src/java.compiler/share/classes/javax/lang/model/SourceVersion.java`:
+  add an `enum` constant for the new source version
+* `src/java.compiler/share/classes/javax/lang/model/util/*` visitors: Update
+  `@SupportedSourceVersion` annotations to latest value. Note this update
+  is done in lieu of introducing another set of visitors for each Java
+  SE release.
+* `src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java`:
+   add an `enum` constant for the new source version internal to `javac`
+* `src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassFile.java`:
+   add an `enum` constant for the new class file format version internal to `javac`
+* `src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java`:
+   add an `enum` constant for the new target version internal to `javac`
+* `src/jdk.compiler/share/classes/com/sun/tools/javac/processing/PrintingProcessor.java`
+   update printing processor to support the new source version
+* The symbol information for `--release` is stored as new text files in the
+  `src/jdk.compiler/share/data/symbols` directory, one file per
+  module. The README file in that directory contains directions on how
+  to create the files.
+
+### `test` files
+
+* `test/langtools/tools/javac/api/TestGetSourceVersions.java`: add new `SourceVersion` constant to test matrix.
+* `test/langtools/tools/javac/classfiles/ClassVersionChecker.java`: add new enum constant for the new class file version
+* `test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java`
+   update annotation processor extended by `javac` tests to cover the new source version
+* `test/langtools/tools/javac/preview/classReaderTest/Client.nopreview.out` and `test/langtools/tools/javac/preview/classReaderTest/Client.preview.out`: update expected messages for preview errors and warnings
+

doc/testing.html

@@ -72,6 +72,11 @@ id="toc-notes-for-specific-tests">Notes for Specific Tests</a>
 <li><a href="#non-us-locale" id="toc-non-us-locale">Non-US
 locale</a></li>
 <li><a href="#pkcs11-tests" id="toc-pkcs11-tests">PKCS11 Tests</a></li>
+</ul></li>
+<li><a href="#testing-ahead-of-time-optimizations"
+id="toc-testing-ahead-of-time-optimizations">### Testing Ahead-of-time
+Optimizations</a>
+<ul>
 <li><a href="#testing-with-alternative-security-providers"
 id="toc-testing-with-alternative-security-providers">Testing with
 alternative security providers</a></li>
@@ -596,6 +601,37 @@ element of the appropriate <code>@Artifact</code> class. (See
     JTREG=&quot;JAVA_OPTIONS=-Djdk.test.lib.artifacts.nsslib-linux_aarch64=/path/to/NSS-libs&quot;</code></pre>
 <p>For more notes about the PKCS11 tests, please refer to
 test/jdk/sun/security/pkcs11/README.</p>
+<h2 id="testing-ahead-of-time-optimizations">### Testing Ahead-of-time
+Optimizations</h2>
+<p>One way to improve test coverage of ahead-of-time (AOT) optimizations
+in the JDK is to run existing jtreg test cases in a special "AOT_JDK"
+mode. Example:</p>
+<pre><code>$ make test JTREG=&quot;AOT_JDK=onestep&quot; \
+    TEST=open/test/hotspot/jtreg/runtime/invokedynamic</code></pre>
+<p>In this testing mode, we first perform an AOT training run (see
+https://openjdk.org/jeps/483) of a special test program (<a
+href="../test/setup_aot/TestSetupAOT.java">test/setup_aot/TestSetupAOT.java</a>)
+that accesses about 5,0000 classes in the JDK core libraries.
+Optimization artifacts for these classes (such as pre-linked lambda
+expressions, execution profiles, and pre-generated native code) are
+stored into an AOT cache file, which will be used by all the JVMs
+launched by the selected jtreg test cases.</p>
+<p>When the jtreg tests call into the core libraries classes that are in
+the AOT cache, we will be able to test the AOT optimizations that were
+used on those classes.</p>
+<p>Please note that not all existing jtreg test cases can be executed
+with the AOT_JDK mode. See <a
+href="../test/hotspot/jtreg/ProblemList-AotJdk.txt">test/hotspot/jtreg/ProblemList-AotJdk.txt</a>
+and <a
+href="../test/jdk/ProblemList-AotJdk.txt">test/jdk/ProblemList-AotJdk.txt</a>.</p>
+<p>Also, test cases that were written specifically to test AOT, such as
+the tests under <a
+href="../test/hotspot/jtreg/runtime/cds/">test/hotspot/jtreg/runtime/cds</a>,
+cannot be executed with the AOT_JDK mode.</p>
+<p>Valid values for <code>AOT_JDK</code> are <code>onestep</code> and
+<code>twostep</code>. These control how the AOT cache is generated. See
+https://openjdk.org/jeps/514 for details. All other values are
+ignored.</p>
 <h3 id="testing-with-alternative-security-providers">Testing with
 alternative security providers</h3>
 <p>Some security tests use a hardcoded provider for

doc/testing.md

@@ -611,6 +611,43 @@ $ make test TEST="jtreg:sun/security/pkcs11/Secmod/AddTrustedCert.java" \
 For more notes about the PKCS11 tests, please refer to
 test/jdk/sun/security/pkcs11/README.
 
+### Testing Ahead-of-time Optimizations
+-------------------------------------------------------------------------------
+One way to improve test coverage of ahead-of-time (AOT) optimizations in
+the JDK is to run existing jtreg test cases in a special "AOT_JDK" mode.
+Example:
+
+```
+$ make test JTREG="AOT_JDK=onestep" \
+    TEST=open/test/hotspot/jtreg/runtime/invokedynamic
+```
+
+In this testing mode, we first perform an AOT training run
+(see https://openjdk.org/jeps/483) of a special test program
+([test/setup_aot/TestSetupAOT.java](../test/setup_aot/TestSetupAOT.java))
+that accesses about 5,0000 classes in the JDK core libraries.
+Optimization artifacts for these classes (such as pre-linked
+lambda expressions, execution profiles, and pre-generated native code)
+are stored into an AOT cache file, which will be used by all the JVMs
+launched by the selected jtreg test cases.
+
+When the jtreg tests call into the core libraries classes that are in
+the AOT cache, we will be able to test the AOT optimizations that were
+used on those classes.
+
+Please note that not all existing jtreg test cases can be executed with
+the AOT_JDK mode. See
+[test/hotspot/jtreg/ProblemList-AotJdk.txt](../test/hotspot/jtreg/ProblemList-AotJdk.txt)
+and [test/jdk/ProblemList-AotJdk.txt](../test/jdk/ProblemList-AotJdk.txt).
+
+Also, test cases that were written specifically to test AOT, such as the tests
+under [test/hotspot/jtreg/runtime/cds](../test/hotspot/jtreg/runtime/cds/),
+cannot be executed with the AOT_JDK mode.
+
+Valid values for `AOT_JDK` are `onestep` and `twostep`. These control how
+the AOT cache is generated. See https://openjdk.org/jeps/514 for details.
+All other values are ignored.
+
 ### Testing with alternative security providers
 
 Some security tests use a hardcoded provider for `KeyFactory`, `Cipher`,

make/CompileInterimLangtools.gmk

@@ -99,6 +99,7 @@ define SetupInterimModule
       EXCLUDE_FILES := $(TOPDIR)/src/$1/share/classes/module-info.java \
           $(TOPDIR)/src/$1/share/classes/javax/tools/ToolProvider.java \
           $(TOPDIR)/src/$1/share/classes/com/sun/tools/javac/launcher/Main.java \
+          $(TOPDIR)/src/$1/share/classes/com/sun/tools/javac/launcher/MemoryClassLoader.java \
           $(TOPDIR)/src/$1/share/classes/com/sun/tools/javac/launcher/MemoryContext.java \
           $(TOPDIR)/src/$1/share/classes/com/sun/tools/javac/launcher/MemoryModuleFinder.java \
           $(TOPDIR)/src/$1/share/classes/com/sun/tools/javac/launcher/SourceLauncher.java \

make/Docs.gmk

@@ -79,8 +79,6 @@ JAVADOC_TAGS := \
     -tag see \
     -taglet build.tools.taglet.ExtLink \
     -taglet build.tools.taglet.Incubating \
-    -taglet build.tools.taglet.PreviewNote \
-    --preview-note-tag previewNote \
     -tagletpath $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
     $(CUSTOM_JAVADOC_TAGS) \
     #
@@ -98,7 +96,7 @@ JAVADOC_DISABLED_DOCLINT_PACKAGES := org.w3c.* javax.smartcardio
 JAVADOC_OPTIONS := -use -keywords -notimestamp \
     -serialwarn -encoding utf-8 -docencoding utf-8 -breakiterator \
     -splitIndex --system none -javafx --expand-requires transitive \
-    --override-methods=summary --syntax-highlight
+    --override-methods=summary
 
 # The reference options must stay stable to allow for comparisons across the
 # development cycle.
@@ -542,7 +540,9 @@ $(eval $(call SetupApiDocsGeneration, REFERENCE_API, \
 # Format: space-delimited list of names, including at most one '%' as a
 # wildcard. Spec source files match if their filename or any enclosing folder
 # name matches one of the items in SPEC_FILTER.
-SPEC_FILTER := %
+ifeq ($(SPEC_FILTER), )
+  SPEC_FILTER := %
+endif
 
 ApplySpecFilter = \
     $(strip $(foreach file, $(1), \

make/GenerateLinkOptData.gmk

@@ -76,11 +76,13 @@ $(CLASSLIST_FILE): $(INTERIM_IMAGE_DIR)/bin/java$(EXECUTABLE_SUFFIX) $(CLASSLIST
 	$(call LogInfo, Generating $(patsubst $(OUTPUTDIR)/%, %, $(JLI_TRACE_FILE)))
 	$(FIXPATH) $(INTERIM_IMAGE_DIR)/bin/java -XX:DumpLoadedClassList=$@.raw \
 	    $(CLASSLIST_FILE_VM_OPTS) \
+	    -Xlog:aot=off \
 	    -Xlog:cds=off \
 	    -cp $(SUPPORT_OUTPUTDIR)/classlist.jar \
 	    build.tools.classlist.HelloClasslist $(LOG_DEBUG)
 	$(GREP) -v HelloClasslist $@.raw > $@.interim
 	$(FIXPATH) $(INTERIM_IMAGE_DIR)/bin/java -Xshare:dump \
+	    -Xlog:aot=off \
 	    -Xlog:cds=off \
 	    -XX:SharedClassListFile=$@.interim -XX:SharedArchiveFile=$@.jsa \
 	    -Xmx128M -Xms128M $(LOG_INFO)
@@ -89,6 +91,7 @@ $(CLASSLIST_FILE): $(INTERIM_IMAGE_DIR)/bin/java$(EXECUTABLE_SUFFIX) $(CLASSLIST
 	    -Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true \
 	    $(CLASSLIST_FILE_VM_OPTS) \
 	    --module-path $(SUPPORT_OUTPUTDIR)/classlist.jar \
+	    -Xlog:aot=off \
 	    -Xlog:cds=off \
 	    -cp $(SUPPORT_OUTPUTDIR)/classlist.jar \
 	    build.tools.classlist.HelloClasslist \
@@ -103,6 +106,7 @@ $(CLASSLIST_FILE): $(INTERIM_IMAGE_DIR)/bin/java$(EXECUTABLE_SUFFIX) $(CLASSLIST
 	$(GREP) -v HelloClasslist $@.raw.2 > $@.raw.3
 	$(GREP) -v @cp $@.raw.3 > $@.raw.4
 	$(FIXPATH) $(INTERIM_IMAGE_DIR)/bin/java \
+	    -Xlog:aot=off \
 	    -Xlog:cds=off \
 	    -cp $(SUPPORT_OUTPUTDIR)/classlist.jar \
 	    build.tools.classlist.SortClasslist $@.raw.4 > $@

make/Images.gmk

@@ -162,7 +162,7 @@ define CreateCDSArchive
   endif
 
   ifeq ($(DEBUG_CDS_ARCHIVE), true)
-    $1_$2_CDS_DUMP_FLAGS += -Xlog:cds+map*=trace:file=$$(JDK_IMAGE_DIR)/$$($1_$2_CDS_ARCHIVE).cdsmap:none:filesize=0
+    $1_$2_CDS_DUMP_FLAGS += -Xlog:aot+map*=trace:file=$$(JDK_IMAGE_DIR)/$$($1_$2_CDS_ARCHIVE).cdsmap:none:filesize=0
   endif
 
   $$(eval $$(call SetupExecute, $1_$2_gen_cds_archive_jdk, \

make/Init.gmk

@@ -37,10 +37,6 @@ include MakeFileStart.gmk
 include $(TOPDIR)/make/InitSupport.gmk
 include LogUtils.gmk
 
-# Force early generation of module-deps.gmk
-GENERATE_MODULE_DEPS_FILE := true
-include Modules.gmk
-
 # Inclusion of this pseudo-target will cause make to execute this file
 # serially, regardless of -j.
 .NOTPARALLEL:
@@ -114,7 +110,18 @@ reconfigure:
 	    CUSTOM_CONFIG_DIR="$(CUSTOM_CONFIG_DIR)" \
 	    $(RECONFIGURE_COMMAND) )
 
-.PHONY: print-modules print-targets print-tests print-configuration reconfigure
+# Create files that are needed to run most targets in Main.gmk
+create-make-helpers:
+	( cd $(TOPDIR) && \
+	    $(MAKE) $(MAKE_ARGS) -j 1 -f make/GenerateFindTests.gmk \
+	    $(USER_MAKE_VARS) )
+	( cd $(TOPDIR) && \
+	    $(MAKE) $(MAKE_ARGS) -j 1 -f make/Main.gmk $(USER_MAKE_VARS) \
+	    UPDATE_MODULE_DEPS=true NO_RECIPES=true \
+	    create-main-targets-include )
+
+.PHONY: print-modules print-targets print-tests print-configuration \
+    reconfigure create-make-helpers
 
 ##############################################################################
 # The main target. This will delegate all other targets into Main.gmk.
@@ -134,7 +141,7 @@ TARGET_DESCRIPTION := target$(if $(word 2, $(MAIN_TARGETS)),s) \
 # variables are explicitly propagated using $(USER_MAKE_VARS).
 main: MAKEOVERRIDES :=
 
-main: $(INIT_TARGETS)
+main: $(INIT_TARGETS) create-make-helpers
         ifneq ($(SEQUENTIAL_TARGETS)$(PARALLEL_TARGETS), )
 	  $(call RotateLogFiles)
 	  $(ECHO) "Building $(TARGET_DESCRIPTION)" $(BUILD_LOG_PIPE_SIMPLE)
@@ -144,6 +151,9 @@ main: $(INIT_TARGETS)
 	    ( cd $(TOPDIR) && \
 	        $(MAKE) $(MAKE_ARGS) -j 1 -f make/Main.gmk $(USER_MAKE_VARS) \
 	        $(SEQUENTIAL_TARGETS) )
+            # We might have cleaned away essential files, recreate them.
+	    ( cd $(TOPDIR) && \
+	        $(MAKE) $(MAKE_ARGS) -j 1 -f make/Init.gmk create-make-helpers )
           endif
           ifneq ($(PARALLEL_TARGETS), )
 	    $(call PrepareFailureLogs)

make/Main.gmk

@@ -42,6 +42,12 @@ include MakeFileStart.gmk
 include $(TOPDIR)/make/MainSupport.gmk
 
 include FindTests.gmk
+
+ifeq ($(UPDATE_MODULE_DEPS), true)
+  # Update module-deps.gmk if requested. This is read in Modules.gmk.
+  GENERATE_MODULE_DEPS_FILE := true
+endif
+
 include Modules.gmk
 
 # Are we requested to ignore dependencies?
@@ -411,12 +417,14 @@ $(eval $(call SetupTarget, create-source-revision-tracker, \
 ))
 
 BOOTCYCLE_TARGET := product-images
+BOOTCYCLE_SPEC := $(dir $(SPEC))bootcycle-spec.gmk
+
 bootcycle-images:
         ifneq ($(COMPILE_TYPE), cross)
 	  $(call LogWarn, Boot cycle build step 2: Building a new JDK image using previously built image)
 	  $(call MakeDir, $(OUTPUTDIR)/bootcycle-build)
 	  +$(MAKE) $(MAKE_ARGS) -f $(TOPDIR)/make/Init.gmk PARALLEL_TARGETS=$(BOOTCYCLE_TARGET) \
-	      LOG_PREFIX="[bootcycle] " JOBS= SPEC=$(dir $(SPEC))bootcycle-spec.gmk main
+	      LOG_PREFIX="[bootcycle] " JOBS= SPEC=$(BOOTCYCLE_SPEC) main
         else
 	  $(call LogWarn, Boot cycle build disabled when cross compiling)
         endif
@@ -1006,7 +1014,7 @@ else
   else ifeq ($(EXTERNAL_BUILDJDK), false)
     # When not cross compiling, the BUILD_JDK is the interim jdk image, and
     # the javac launcher is needed.
-    jdk.compiler-gendata: jdk.compiler-launchers
+    jdk.compiler-gendata: jdk.compiler-launchers java.base-launchers
     jdk.javadoc-gendata: jdk.compiler-launchers
   endif
 

make/PreInit.gmk

@@ -50,7 +50,8 @@ include $(TOPDIR)/make/Global.gmk
 
 # Targets provided by Init.gmk.
 ALL_INIT_TARGETS := print-modules print-targets print-configuration \
-    print-tests reconfigure pre-compare-build post-compare-build
+    print-tests reconfigure pre-compare-build post-compare-build \
+    create-make-helpers
 
 # CALLED_TARGETS is the list of targets that the user provided,
 # or "default" if unspecified.

make/PreInitSupport.gmk

@@ -268,11 +268,12 @@ define DefineMainTargets
 
   $$(main_targets_file):
 	@( cd $$(TOPDIR) && \
-	$$(MAKE) $$(MAKE_LOG_FLAGS) -r -R -f $$(TOPDIR)/make/GenerateFindTests.gmk \
+	$$(MAKE) $$(MAKE_LOG_FLAGS) -s -r -R -f $$(TOPDIR)/make/GenerateFindTests.gmk \
 	    -I $$(TOPDIR)/make/common SPEC=$$(SPEC_FILE) TOPDIR_ALT=$$(TOPDIR))
 	@( cd $$(TOPDIR) && \
-	$$(MAKE) $$(MAKE_LOG_FLAGS) -r -R -f $$(TOPDIR)/make/Main.gmk \
-	    -I $$(TOPDIR)/make/common SPEC=$$(SPEC_FILE) TOPDIR_ALT=$$(TOPDIR) NO_RECIPES=true \
+	$$(MAKE) $$(MAKE_LOG_FLAGS) -s -r -R -f $$(TOPDIR)/make/Main.gmk \
+	    -I $$(TOPDIR)/make/common SPEC=$$(SPEC_FILE) TOPDIR_ALT=$$(TOPDIR) \
+	    UPDATE_MODULE_DEPS=true NO_RECIPES=true \
 	    $$(MAKE_LOG_VARS) \
 	    create-main-targets-include )
 

make/RunTests.gmk

@@ -583,6 +583,8 @@ define SetMicroValue
   else
     ifneq ($3, )
       $1_$2 := $3
+    else
+      $1_$2 :=
     endif
   endif
 endef
@@ -709,6 +711,8 @@ define SetJtregValue
     else
       ifneq ($3, )
         $1_$2 := $3
+      else
+        $1_$2 :=
       endif
     endif
   endif
@@ -721,6 +725,7 @@ endef
 # Parameter 1 is the name of the rule.
 #
 # Remaining parameters are named arguments.
+#   TRAINING    The AOT training mode: onestep or twostep
 #   VM_OPTIONS  List of JVM arguments to use when creating AOT cache
 #
 #  After calling this, the following variables are defined
@@ -749,23 +754,39 @@ define SetupAOTBody
   $$($1_AOT_JDK_CACHE): $$(JDK_IMAGE_DIR)/release
 	$$(call MakeDir, $$($1_AOT_JDK_OUTPUT_DIR))
 
-	$$(call LogWarn, AOT: Create cache configuration) \
-	$$(call ExecuteWithLog, $$($1_AOT_JDK_OUTPUT_DIR), ( \
-            cd $$($1_AOT_JDK_OUTPUT_DIR); \
-	    $(JAR) --extract --file $(TEST_IMAGE_DIR)/setup_aot/TestSetupAOT.jar; \
-	    $$(FIXPATH) $(JDK_UNDER_TEST)/bin/java $$($1_VM_OPTIONS) \
-	        -Xlog:class+load,cds,cds+class=debug:file=$$($1_AOT_JDK_CONF).log  -Xlog:cds*=error \
-	        -XX:AOTMode=record -XX:AOTConfiguration=$$($1_AOT_JDK_CONF) \
-	        TestSetupAOT $$($1_AOT_JDK_OUTPUT_DIR) > $$($1_AOT_JDK_LOG) \
-	))
+        ifeq ($$($1_TRAINING), onestep)
 
-	$$(call LogWarn, AOT: Generate AOT cache $$($1_AOT_JDK_CACHE) with flags: $$($1_VM_OPTIONS))
-	$$(call ExecuteWithLog, $$($1_AOT_JDK_OUTPUT_DIR), ( \
-	    $$(FIXPATH) $(JDK_UNDER_TEST)/bin/java \
-	        $$($1_VM_OPTIONS) -Xlog:cds,cds+class=debug:file=$$($1_AOT_JDK_CACHE).log -Xlog:cds*=error \
-	        -XX:ExtraSharedClassListFile=$(JDK_UNDER_TEST)/lib/classlist \
-	        -XX:AOTMode=create -XX:AOTConfiguration=$$($1_AOT_JDK_CONF) -XX:AOTCache=$$($1_AOT_JDK_CACHE) \
-	))
+	  $$(call LogWarn, AOT: Create AOT cache $$($1_AOT_JDK_CACHE) in one step with flags: $$($1_VM_OPTIONS)) \
+	  $$(call ExecuteWithLog, $$($1_AOT_JDK_OUTPUT_DIR), ( \
+	      cd $$($1_AOT_JDK_OUTPUT_DIR); \
+	      $(JAR) --extract --file $(TEST_IMAGE_DIR)/setup_aot/TestSetupAOT.jar; \
+	      $$(FIXPATH) $(JDK_UNDER_TEST)/bin/java $$($1_VM_OPTIONS) \
+	          -Xlog:class+load,aot,aot+class=debug:file=$$($1_AOT_JDK_CACHE).log  -Xlog:cds*=error -Xlog:aot*=error  \
+	          -XX:AOTMode=record -XX:AOTCacheOutput=$$($1_AOT_JDK_CACHE) \
+	          TestSetupAOT $$($1_AOT_JDK_OUTPUT_DIR) > $$($1_AOT_JDK_LOG) \
+	  ))
+
+        else
+
+	  $$(call LogWarn, AOT: Create cache configuration) \
+	  $$(call ExecuteWithLog, $$($1_AOT_JDK_OUTPUT_DIR), ( \
+	      cd $$($1_AOT_JDK_OUTPUT_DIR); \
+	      $(JAR) --extract --file $(TEST_IMAGE_DIR)/setup_aot/TestSetupAOT.jar; \
+	      $$(FIXPATH) $(JDK_UNDER_TEST)/bin/java $$($1_VM_OPTIONS) \
+	          -Xlog:class+load,aot,aot+class=debug:file=$$($1_AOT_JDK_CONF).log  -Xlog:cds*=error -Xlog:aot*=error \
+	          -XX:AOTMode=record -XX:AOTConfiguration=$$($1_AOT_JDK_CONF) \
+	          TestSetupAOT $$($1_AOT_JDK_OUTPUT_DIR) > $$($1_AOT_JDK_LOG) \
+	  ))
+
+	  $$(call LogWarn, AOT: Generate AOT cache $$($1_AOT_JDK_CACHE) with flags: $$($1_VM_OPTIONS))
+	  $$(call ExecuteWithLog, $$($1_AOT_JDK_OUTPUT_DIR), ( \
+	      $$(FIXPATH) $(JDK_UNDER_TEST)/bin/java \
+	          $$($1_VM_OPTIONS) -Xlog:aot,aot+class=debug:file=$$($1_AOT_JDK_CACHE).log -Xlog:cds*=error -Xlog:aot*=error \
+	          -XX:ExtraSharedClassListFile=$(JDK_UNDER_TEST)/lib/classlist \
+	          -XX:AOTMode=create -XX:AOTConfiguration=$$($1_AOT_JDK_CONF) -XX:AOTCache=$$($1_AOT_JDK_CACHE) \
+	  ))
+
+        endif
 
   $1_AOT_TARGETS += $$($1_AOT_JDK_CACHE)
 
@@ -831,7 +852,7 @@ define SetupRunJtregTestBody
   JTREG_RETRY_COUNT ?= 0
   JTREG_REPEAT_COUNT ?= 0
   JTREG_REPORT ?= files
-  JTREG_AOT_JDK ?= false
+  JTREG_AOT_JDK ?= none
 
   ifneq ($$(JTREG_RETRY_COUNT), 0)
     ifneq ($$(JTREG_REPEAT_COUNT), 0)
@@ -841,6 +862,12 @@ define SetupRunJtregTestBody
     endif
   endif
 
+  ifeq ($$(JTREG_RUN_PROBLEM_LISTS), true)
+    JTREG_PROBLEM_LIST_PREFIX := -match:
+  else
+    JTREG_PROBLEM_LIST_PREFIX := -exclude:
+  endif
+
   ifneq ($$(JTREG_TEST_THREAD_FACTORY), )
     $1_JTREG_BASIC_OPTIONS += -testThreadFactoryPath:$$(JTREG_TEST_THREAD_FACTORY_JAR)
     $1_JTREG_BASIC_OPTIONS += -testThreadFactory:$$(JTREG_TEST_THREAD_FACTORY)
@@ -869,7 +896,7 @@ define SetupRunJtregTestBody
   # version of the JDK.
   $1_JTREG_BASIC_OPTIONS += -$$($1_JTREG_TEST_MODE) \
       -verbose:$$(JTREG_VERBOSE) -retain:$$(JTREG_RETAIN) \
-      -concurrency:$$($1_JTREG_JOBS) -timeoutFactor:$$(JTREG_TIMEOUT_FACTOR) \
+      -concurrency:$$($1_JTREG_JOBS) \
       -vmoption:-XX:MaxRAMPercentage=$$($1_JTREG_MAX_RAM_PERCENTAGE) \
       -vmoption:-Dtest.boot.jdk="$$(BOOT_JDK)" \
       -vmoption:-Djava.io.tmpdir="$$($1_TEST_TMP_DIR)"
@@ -902,12 +929,6 @@ define SetupRunJtregTestBody
     $1_JTREG_BASIC_OPTIONS += -nativepath:$$($1_JTREG_NATIVEPATH)
   endif
 
-  ifeq ($$(JTREG_RUN_PROBLEM_LISTS), true)
-    JTREG_PROBLEM_LIST_PREFIX := -match:
-  else
-    JTREG_PROBLEM_LIST_PREFIX := -exclude:
-  endif
-
   ifneq ($$($1_JTREG_PROBLEM_LIST), )
     $1_JTREG_BASIC_OPTIONS += $$(addprefix $$(JTREG_PROBLEM_LIST_PREFIX), $$($1_JTREG_PROBLEM_LIST))
   endif
@@ -971,12 +992,12 @@ define SetupRunJtregTestBody
     endif
   endif
 
-  ifeq ($$(JTREG_AOT_JDK), true)
+  ifneq ($$(filter $$(JTREG_AOT_JDK), onestep twostep), )
     $$(call LogWarn, Add AOT target for $1)
-    $$(eval $$(call SetupAOT, $1, VM_OPTIONS := $$(JTREG_ALL_OPTIONS) ))
-
+    $$(eval $$(call SetupAOT, $1, \
+        TRAINING := $$(JTREG_AOT_JDK), \
+        VM_OPTIONS := $$(JTREG_ALL_OPTIONS) ))
     $$(call LogWarn, AOT_JDK_CACHE=$$($1_AOT_JDK_CACHE))
-
     $1_JTREG_BASIC_OPTIONS += -vmoption:-XX:AOTCache="$$($1_AOT_JDK_CACHE)"
   endif
 
@@ -994,6 +1015,7 @@ define SetupRunJtregTestBody
   endif
 
   JTREG_TIMEOUT_FACTOR ?= $$(JTREG_AUTO_TIMEOUT_FACTOR)
+  $1_JTREG_BASIC_OPTIONS += -timeoutFactor:$$(JTREG_TIMEOUT_FACTOR)
 
   clean-outputdirs-$1:
 	$$(call LogWarn, Clean up dirs for $1)

make/ToolsJdk.gmk

@@ -78,6 +78,9 @@ TOOL_GENERATECACERTS = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_class
 TOOL_GENERATEEXTRAPROPERTIES = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
     build.tools.generateextraproperties.GenerateExtraProperties
 
+TOOL_GENERATECASEFOLDING = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
+    build.tools.generatecharacter.CaseFolding
+
 TOOL_MAKEZIPREPRODUCIBLE = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
     build.tools.makezipreproducible.MakeZipReproducible
 

make/autoconf/basic.m4

@@ -415,11 +415,21 @@ AC_DEFUN_ONCE([BASIC_SETUP_OUTPUT_DIR],
       [ CONF_NAME=${with_conf_name} ])
 
   # Test from where we are running configure, in or outside of src root.
+  if test "x$OPENJDK_BUILD_OS" = xwindows || test "x$OPENJDK_BUILD_OS" = "xmacosx"; then
+    # These systems have case insensitive paths, so convert them to lower case.
+    [ cmp_configure_start_dir=`$ECHO $CONFIGURE_START_DIR | $TR '[:upper:]' '[:lower:]'` ]
+    [ cmp_topdir=`$ECHO $TOPDIR | $TR '[:upper:]' '[:lower:]'` ]
+    [ cmp_custom_root=`$ECHO $CUSTOM_ROOT | $TR '[:upper:]' '[:lower:]'` ]
+  else
+    cmp_configure_start_dir="$CONFIGURE_START_DIR"
+    cmp_topdir="$TOPDIR"
+    cmp_custom_root="$CUSTOM_ROOT"
+  fi
   AC_MSG_CHECKING([where to store configuration])
-  if test "x$CONFIGURE_START_DIR" = "x$TOPDIR" \
-      || test "x$CONFIGURE_START_DIR" = "x$CUSTOM_ROOT" \
-      || test "x$CONFIGURE_START_DIR" = "x$TOPDIR/make/autoconf" \
-      || test "x$CONFIGURE_START_DIR" = "x$TOPDIR/make" ; then
+  if test "x$cmp_configure_start_dir" = "x$cmp_topdir" \
+      || test "x$cmp_configure_start_dir" = "x$cmp_custom_root" \
+      || test "x$cmp_configure_start_dir" = "x$cmp_topdir/make/autoconf" \
+      || test "x$cmp_configure_start_dir" = "x$cmp_topdir/make" ; then
     # We are running configure from the src root.
     # Create a default ./build/target-variant-debuglevel output root.
     if test "x${CONF_NAME}" = x; then
@@ -440,7 +450,12 @@ AC_DEFUN_ONCE([BASIC_SETUP_OUTPUT_DIR],
     # If configuration is situated in normal build directory, just use the build
     # directory name as configuration name, otherwise use the complete path.
     if test "x${CONF_NAME}" = x; then
-      CONF_NAME=`$ECHO $CONFIGURE_START_DIR | $SED -e "s!^${TOPDIR}/build/!!"`
+      [ if [[ "$cmp_configure_start_dir" =~ ^${cmp_topdir}/build/[^/]+$ ||
+          "$cmp_configure_start_dir" =~ ^${cmp_custom_root}/build/[^/]+$ ]]; then ]
+          CONF_NAME="${CONFIGURE_START_DIR##*/}"
+      else
+          CONF_NAME="$CONFIGURE_START_DIR"
+      fi
     fi
     OUTPUTDIR="$CONFIGURE_START_DIR"
     AC_MSG_RESULT([in current directory])

make/autoconf/configure

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -366,7 +366,7 @@ EOT
 
     # Print additional help, e.g. a list of toolchains and JVM features.
     # This must be done by the autoconf script.
-    ( CONFIGURE_PRINT_ADDITIONAL_HELP=true . $generated_script PRINTF=printf )
+    ( CONFIGURE_PRINT_ADDITIONAL_HELP=true . $generated_script PRINTF=printf ECHO=echo )
 
     cat <<EOT
 

make/autoconf/flags-cflags.m4

@@ -732,8 +732,7 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
       $1_CFLAGS_CPU_JVM="-mno-multiple -mno-string"
       if test "x$FLAGS_CPU" = xppc64; then
         # -mminimal-toc fixes `relocation truncated to fit' error for gcc 4.1.
-        # Use ppc64 instructions, but schedule for power5
-        $1_CFLAGS_CPU="-mcpu=powerpc64 -mtune=power5"
+        $1_CFLAGS_CPU="-mcpu=power8 -mtune=power8"
         $1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -mminimal-toc"
       elif test "x$FLAGS_CPU" = xppc64le; then
         # Little endian machine uses ELFv2 ABI.

make/autoconf/lib-tests.m4

@@ -28,7 +28,7 @@
 ################################################################################
 
 # Minimum supported versions
-JTREG_MINIMUM_VERSION=7.5.1
+JTREG_MINIMUM_VERSION=7.5.2
 GTEST_MINIMUM_VERSION=1.14.0
 
 ################################################################################

make/conf/github-actions.conf

@@ -26,7 +26,7 @@
 # Versions and download locations for dependencies used by GitHub Actions (GHA)
 
 GTEST_VERSION=1.14.0
-JTREG_VERSION=7.5.1+1
+JTREG_VERSION=7.5.2+1
 
 LINUX_X64_BOOT_JDK_EXT=tar.gz
 LINUX_X64_BOOT_JDK_URL=https://download.java.net/java/GA/jdk24/1f9ff9062db4449d8ca828c504ffae90/36/GPL/openjdk-24_linux-x64_bin.tar.gz

make/conf/jib-profiles.js

@@ -254,7 +254,6 @@ var getJibProfilesCommon = function (input, data) {
         configure_args: concat(
             "--with-exclude-translations=es,fr,it,ko,pt_BR,sv,ca,tr,cs,sk,ja_JP_A,ja_JP_HA,ja_JP_HI,ja_JP_I,zh_TW,zh_HK",
             "--disable-jvm-feature-shenandoahgc",
-            "--disable-cds-archive-coh",
             versionArgs(input, common))
     };
 
@@ -1175,9 +1174,9 @@ var getJibProfilesDependencies = function (input, common) {
         jtreg: {
             server: "jpg",
             product: "jtreg",
-            version: "7.5.1",
+            version: "7.5.2",
             build_number: "1",
-            file: "bundles/jtreg-7.5.1+1.zip",
+            file: "bundles/jtreg-7.5.2+1.zip",
             environment_name: "JT_HOME",
             environment_path: input.get("jtreg", "home_path") + "/bin",
             configure_args: "--with-jtreg=" + input.get("jtreg", "home_path"),
@@ -1193,8 +1192,8 @@ var getJibProfilesDependencies = function (input, common) {
             server: "jpg",
             product: "jcov",
             version: "3.0",
-            build_number: "1",
-            file: "bundles/jcov-3.0+1.zip",
+            build_number: "3",
+            file: "bundles/jcov-3.0+3.zip",
             environment_name: "JCOV_HOME",
         },
 

make/conf/version-numbers.conf

@@ -26,17 +26,17 @@
 # Default version, product, and vendor information to use,
 # unless overridden by configure
 
-DEFAULT_VERSION_FEATURE=25
+DEFAULT_VERSION_FEATURE=26
 DEFAULT_VERSION_INTERIM=0
 DEFAULT_VERSION_UPDATE=0
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2025-09-16
-DEFAULT_VERSION_CLASSFILE_MAJOR=69  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
+DEFAULT_VERSION_DATE=2026-03-17
+DEFAULT_VERSION_CLASSFILE_MAJOR=70  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11
-DEFAULT_ACCEPTABLE_BOOT_VERSIONS="24 25"
-DEFAULT_JDK_SOURCE_TARGET_VERSION=25
+DEFAULT_ACCEPTABLE_BOOT_VERSIONS="24 25 26"
+DEFAULT_JDK_SOURCE_TARGET_VERSION=26
 DEFAULT_PROMOTED_VERSION_PRE=ea

make/data/asan/asan_default_options.c

@@ -67,6 +67,8 @@ ATTRIBUTE_DEFAULT_VISIBILITY ATTRIBUTE_USED const char* CDECL __asan_default_opt
 #endif
     "print_suppressions=0,"
     "handle_segv=0,"
+    // A lot of libjsig related tests fail because of the link order check; so better avoid it
+    "verify_asan_link_order=0,"
     // See https://github.com/google/sanitizers/issues/1322. Hopefully this is resolved
     // at some point and we can remove this option.
     "intercept_tls_get_addr=0";

make/data/ubsan/ubsan_default_options.c

@@ -62,5 +62,8 @@
 // thread so it is easier to track down. You can override these options by setting the environment
 // variable UBSAN_OPTIONS.
 ATTRIBUTE_DEFAULT_VISIBILITY ATTRIBUTE_USED const char* __ubsan_default_options() {
-  return "halt_on_error=1,print_stacktrace=1" _LLVM_SYMBOLIZER(LLVM_SYMBOLIZER);
+  return "halt_on_error=1,"
+         "handle_segv=0,"
+         "handle_sigbus=0,"
+         "print_stacktrace=1" _LLVM_SYMBOLIZER(LLVM_SYMBOLIZER);
 }

make/devkit/createWindowsDevkit.sh

@@ -64,6 +64,30 @@ IS_WSL=`echo $UNAME_RELEASE | grep Microsoft`
 IS_MSYS=`echo $UNAME_OS | grep -i Msys`
 MSYS2_ARG_CONV_EXCL="*"          # make "cmd.exe /c" work for msys2
 CMD_EXE="cmd.exe /c"
+
+# Detect host architecture to determine devkit platform support
+# Note: The devkit always includes x86, x64, and aarch64 libraries and tools
+# The difference is in toolchain capabilities:
+# - On x64|AMD64 hosts: aarch64 tools are cross-compilation tools (Hostx64/arm64)
+# - On aarch64|ARMv8 hosts: aarch64 tools are native tools (Hostarm64/arm64)
+HOST_ARCH=`echo $PROCESSOR_IDENTIFIER`
+case $HOST_ARCH in
+    AMD64)
+        echo "Running on x64 host - generating devkit with native x86/x64 tools and cross-compiled aarch64 tools."
+        echo "For native aarch64 compilation tools, run this script on a Windows/aarch64 machine."
+        SUPPORTED_PLATFORMS="x86, x64 (native) and aarch64 (cross-compiled)"
+        ;;
+    ARMv8)
+        echo "Running on aarch64 host - generating devkit with native tools for all platforms (x86, x64, aarch64)."
+        SUPPORTED_PLATFORMS="x86, x64, and aarch64 (all native)"
+        ;;
+    *)
+        echo "Unknown host architecture: $HOST_ARCH"
+        echo "Proceeding with devkit generation - toolchain capabilities may vary."
+        SUPPORTED_PLATFORMS="x86, x64, and aarch64"
+        ;;
+esac
+
 if test "x$IS_CYGWIN" != "x"; then
     BUILD_ENV="cygwin"
 elif test "x$IS_MSYS" != "x"; then
@@ -139,6 +163,7 @@ DEVKIT_ROOT="${BUILD_DIR}/VS${VS_VERSION}-${VS_VERSION_SP}-devkit"
 DEVKIT_BUNDLE="${DEVKIT_ROOT}.tar.gz"
 
 echo "Creating devkit in $DEVKIT_ROOT"
+echo "Platform support: $SUPPORTED_PLATFORMS"
 
 MSVCR_DLL=${MSVC_CRT_DIR}/vcruntime${VS_DLL_VERSION}.dll
 VCRUNTIME_1_DLL=${MSVC_CRT_DIR}/vcruntime${VS_DLL_VERSION}_1.dll
@@ -156,7 +181,11 @@ REDIST_SUBDIR="VC/Redist/MSVC/$REDIST_VERSION"
 echo "Copying VC..."
 rm -rf $DEVKIT_ROOT/VC
 mkdir -p $DEVKIT_ROOT/VC/bin
-cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx64/arm64" $DEVKIT_ROOT/VC/bin/
+if [ -d "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostarm64/arm64" ]; then
+    cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostarm64/arm64" $DEVKIT_ROOT/VC/bin/
+else
+    cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx64/arm64" $DEVKIT_ROOT/VC/bin/
+fi
 cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx64/x64" $DEVKIT_ROOT/VC/bin/
 cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx86/x86" $DEVKIT_ROOT/VC/bin/
 mkdir -p $DEVKIT_ROOT/VC/lib

make/hotspot/lib/JvmFeatures.gmk

@@ -128,7 +128,8 @@ ifneq ($(call check-jvm-feature, cds), true)
       aotCodeCache.cpp \
       classLoaderDataShared.cpp \
       classLoaderExt.cpp \
-      systemDictionaryShared.cpp
+      systemDictionaryShared.cpp \
+      trainingData.cpp
   JVM_EXCLUDE_PATTERNS += cds/
 endif
 

make/jdk/src/classes/build/tools/cldrconverter/Bundle.java

@@ -542,10 +542,10 @@ class Bundle {
                     if (pattern != null) {
                         // Perform date-time format pattern conversion which is
                         // applicable to both SimpleDateFormat and j.t.f.DateTimeFormatter.
-                        String transPattern = translateDateFormatLetters(calendarType, pattern, this::convertDateTimePatternLetter);
+                        String transPattern = translateDateFormatLetters(calendarType, key, pattern, this::convertDateTimePatternLetter);
                         dateTimePatterns.add(i, transPattern);
                         // Additionally, perform SDF specific date-time format pattern conversion
-                        sdfPatterns.add(i, translateDateFormatLetters(calendarType, transPattern, this::convertSDFLetter));
+                        sdfPatterns.add(i, translateDateFormatLetters(calendarType, key, transPattern, this::convertSDFLetter));
                     } else {
                         dateTimePatterns.add(i, null);
                         sdfPatterns.add(i, null);
@@ -568,7 +568,7 @@ class Bundle {
         }
     }
 
-    private String translateDateFormatLetters(CalendarType calendarType, String cldrFormat, ConvertDateTimeLetters converter) {
+    private String translateDateFormatLetters(CalendarType calendarType, String patternKey, String cldrFormat, ConvertDateTimeLetters converter) {
         String pattern = cldrFormat;
         int length = pattern.length();
         boolean inQuote = false;
@@ -587,7 +587,7 @@ class Bundle {
                     if (nextc == '\'') {
                         i++;
                         if (count != 0) {
-                            converter.convert(calendarType, lastLetter, count, jrePattern);
+                            converter.convert(calendarType, patternKey, lastLetter, count, jrePattern);
                             lastLetter = 0;
                             count = 0;
                         }
@@ -597,7 +597,7 @@ class Bundle {
                 }
                 if (!inQuote) {
                     if (count != 0) {
-                        converter.convert(calendarType, lastLetter, count, jrePattern);
+                        converter.convert(calendarType, patternKey, lastLetter, count, jrePattern);
                         lastLetter = 0;
                         count = 0;
                     }
@@ -614,7 +614,7 @@ class Bundle {
             }
             if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) {
                 if (count != 0) {
-                    converter.convert(calendarType, lastLetter, count, jrePattern);
+                    converter.convert(calendarType, patternKey, lastLetter, count, jrePattern);
                     lastLetter = 0;
                     count = 0;
                 }
@@ -627,7 +627,7 @@ class Bundle {
                 count++;
                 continue;
             }
-            converter.convert(calendarType, lastLetter, count, jrePattern);
+            converter.convert(calendarType, patternKey, lastLetter, count, jrePattern);
             lastLetter = c;
             count = 1;
         }
@@ -637,7 +637,7 @@ class Bundle {
         }
 
         if (count != 0) {
-            converter.convert(calendarType, lastLetter, count, jrePattern);
+            converter.convert(calendarType, patternKey, lastLetter, count, jrePattern);
         }
         if (cldrFormat.contentEquals(jrePattern)) {
             return cldrFormat;
@@ -661,7 +661,7 @@ class Bundle {
      * on the support given by the SimpleDateFormat and the j.t.f.DateTimeFormatter
      * for date-time formatting.
      */
-    private void convertDateTimePatternLetter(CalendarType calendarType, char cldrLetter, int count, StringBuilder sb) {
+    private void convertDateTimePatternLetter(CalendarType calendarType, String patternKey, char cldrLetter, int count, StringBuilder sb) {
         switch (cldrLetter) {
             case 'u':
             case 'U':
@@ -683,7 +683,7 @@ class Bundle {
      * Perform a conversion of CLDR date-time format pattern letter which is
      * specific to the SimpleDateFormat.
      */
-    private void convertSDFLetter(CalendarType calendarType, char cldrLetter, int count, StringBuilder sb) {
+    private void convertSDFLetter(CalendarType calendarType, String patternKey, char cldrLetter, int count, StringBuilder sb) {
         switch (cldrLetter) {
             case 'G':
                 if (calendarType != CalendarType.GREGORIAN) {
@@ -722,6 +722,17 @@ class Bundle {
                 appendN('z', count, sb);
                 break;
 
+            case 'y':
+                // If the style is FULL/LONG for a Japanese Calendar, make the
+                // count == 4 for Gan-nen
+                if (calendarType == CalendarType.JAPANESE &&
+                        (patternKey.contains("full-") ||
+                         patternKey.contains("long-"))) {
+                    count = 4;
+                }
+                appendN(cldrLetter, count, sb);
+                break;
+
             case 'Z':
                 if (count == 4 || count == 5) {
                     sb.append("XXX");
@@ -767,6 +778,7 @@ class Bundle {
             .collect(Collectors.toMap(
                 e -> calendarPrefix + e.getKey(),
                 e -> translateDateFormatLetters(calendarType,
+                        e.getKey(),
                         (String)e.getValue(),
                         this::convertDateTimePatternLetter)
             ))
@@ -775,7 +787,7 @@ class Bundle {
 
     @FunctionalInterface
     private interface ConvertDateTimeLetters {
-        void convert(CalendarType calendarType, char cldrLetter, int count, StringBuilder sb);
+        void convert(CalendarType calendarType, String patternKey, char cldrLetter, int count, StringBuilder sb);
     }
 
     /**

make/jdk/src/classes/build/tools/generatecharacter/CaseFolding.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package build.tools.generatecharacter;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class CaseFolding {
+
+    public static void main(String[] args) throws Throwable {
+        if (args.length != 3) {
+            System.err.println("Usage: java CaseFolding TemplateFile CaseFolding.txt CaseFolding.java");
+            System.exit(1);
+        }
+        var templateFile = Paths.get(args[0]);
+        var caseFoldingTxt = Paths.get(args[1]);
+        var genSrcFile = Paths.get(args[2]);
+        var supportedTypes = "^.*; [CTS]; .*$";
+        var caseFoldingEntries = Files.lines(caseFoldingTxt)
+            .filter(line -> !line.startsWith("#") && line.matches(supportedTypes))
+            .map(line -> {
+                String[] cols = line.split("; ");
+                return new String[] {cols[0], cols[1], cols[2]};
+            })
+            .filter(cols -> {
+                //  the folding case doesn't map back to the original char.
+                var cp1 = Integer.parseInt(cols[0], 16);
+                var cp2 = Integer.parseInt(cols[2], 16);
+                return Character.toUpperCase(cp2) != cp1 && Character.toLowerCase(cp2) != cp1;
+            })
+            .map(cols -> String.format("        entry(0x%s, 0x%s)", cols[0], cols[2]))
+            .collect(Collectors.joining(",\n", "", ""));
+
+        // hack, hack, hack! the logic does not pick 0131. just add manually to support 'I's.
+        // 0049; T; 0131; # LATIN CAPITAL LETTER I
+        final String T_0x0131_0x49 = String.format("        entry(0x%04x, 0x%04x),\n", 0x0131, 0x49);
+
+        // Generate .java file
+        Files.write(
+            genSrcFile,
+            Files.lines(templateFile)
+                .map(line -> line.contains("%%%Entries") ? T_0x0131_0x49 + caseFoldingEntries : line)
+                .collect(Collectors.toList()),
+            StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
+    }
+}

make/jdk/src/classes/build/tools/generatecharacter/GenerateCharacter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1190,7 +1190,7 @@ OUTER:  for (int i = 0; i < n; i += m) {
         if (Csyntax)
             result.append("  static ");
         else
-            result.append("  static final ");
+            result.append("  @Stable static final ");
         result.append(atype);
         result.append(" ").append(name).append("[");
         if (Csyntax)
@@ -1347,7 +1347,7 @@ OUTER:  for (int i = 0; i < n; i += m) {
     }
 
     static void genCaseMapTableDeclaration(StringBuffer result) {
-        result.append("    static final char[][][] charMap;\n");
+        result.append("    @Stable static final char[][][] charMap;\n");
     }
 
     static void genCaseMapTable(StringBuffer result, SpecialCaseMap[] specialCaseMaps){

make/jdk/src/classes/build/tools/pandocfilter/PandocFilter.java

@@ -1,3 +1,26 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
 package build.tools.pandocfilter;
 
 import build.tools.pandocfilter.json.JSON;

make/jdk/src/classes/build/tools/taglet/PreviewNote.java

@@ -1,127 +0,0 @@
-/*
- * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package build.tools.taglet;
-
-import java.util.EnumSet;
-import java.util.List;
-import java.util.Set;
-
-
-import javax.lang.model.element.Element;
-import javax.tools.Diagnostic;
-
-
-import com.sun.source.doctree.DocTree;
-import com.sun.source.doctree.UnknownInlineTagTree;
-import jdk.javadoc.doclet.Doclet;
-import jdk.javadoc.doclet.DocletEnvironment;
-import jdk.javadoc.doclet.Reporter;
-import jdk.javadoc.doclet.StandardDoclet;
-import jdk.javadoc.doclet.Taglet;
-
-import static com.sun.source.doctree.DocTree.Kind.UNKNOWN_INLINE_TAG;
-
-/**
- * An inline tag to insert a note formatted as preview note.
- * The tag can be used as follows:
- *
- * <pre>
- * {&commat;previewNote jep-number [Preview note heading]}
- * Preview note content
- * {&commat;previewNote}
- * </pre>
- *
- */
-public class PreviewNote implements Taglet {
-
-    static final String TAG_NAME = "previewNote";
-    Reporter reporter = null;
-
-    @Override
-    public void init(DocletEnvironment env, Doclet doclet) {
-        if (doclet instanceof StandardDoclet stdoclet) {
-            reporter = stdoclet.getReporter();
-        }
-    }
-
-    /**
-     * Returns the set of locations in which the tag may be used.
-     */
-    @Override
-    public Set<Location> getAllowedLocations() {
-        return EnumSet.allOf(Taglet.Location.class);
-    }
-
-    @Override
-    public boolean isInlineTag() {
-        return true;
-    }
-
-    @Override
-    public String getName() {
-        return TAG_NAME;
-    }
-
-    @Override
-    public String toString(List<? extends DocTree> tags, Element elem) {
-
-        for (DocTree tag : tags) {
-            if (tag.getKind() == UNKNOWN_INLINE_TAG) {
-                UnknownInlineTagTree inlineTag = (UnknownInlineTagTree) tag;
-                String[] content = inlineTag.getContent().toString().trim().split("\\s+", 2);
-                if (!content[0].isBlank()) {
-                    StringBuilder sb = new StringBuilder("""
-                       <div class="preview-block" style="margin-top:10px; display:block; max-width:max-content;">
-                       """);
-                    if (content.length == 2) {
-                        sb.append("""
-                                <div class="preview-label">
-                                """)
-                          .append(content[1])
-                          .append("""
-                                </div>
-                                """);
-                    }
-                    sb.append("""
-                            <div class="preview-comment">
-                            """);
-                    return sb.toString();
-                } else {
-                    return """
-                             </div>
-                             </div>
-                            """;
-                }
-            }
-        }
-
-        if (reporter == null) {
-            throw new IllegalArgumentException("@" + TAG_NAME + " taglet content must be begin or end");
-        }
-        reporter.print(Diagnostic.Kind.ERROR, "@" + TAG_NAME + " taglet content must be begin or end");
-        return "";
-    }
-}

make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java

@@ -46,6 +46,8 @@ import java.io.OutputStream;
 import java.io.StringWriter;
 import java.io.Writer;
 import java.lang.classfile.*;
+import java.lang.classfile.TypeAnnotation.TargetInfo;
+import java.lang.classfile.TypeAnnotation.TypePathComponent;
 import java.lang.classfile.attribute.*;
 import java.lang.classfile.constantpool.ClassEntry;
 import java.lang.classfile.constantpool.ConstantPoolBuilder;
@@ -304,13 +306,18 @@ public class CreateSymbols {
             "Ljdk/internal/ValueBased;";
     private static final String VALUE_BASED_ANNOTATION_INTERNAL =
             "Ljdk/internal/ValueBased+Annotation;";
+    private static final String REQUIRES_IDENTITY_ANNOTATION =
+            "Ljdk/internal/RequiresIdentity;";
+    private static final String REQUIRES_IDENTITY_ANNOTATION_INTERNAL =
+            "Ljdk/internal/RequiresIdentity+Annotation;";
     public static final Set<String> HARDCODED_ANNOTATIONS = new HashSet<>(
             List.of("Ljdk/Profile+Annotation;",
                     "Lsun/Proprietary+Annotation;",
                     PREVIEW_FEATURE_ANNOTATION_OLD,
                     PREVIEW_FEATURE_ANNOTATION_NEW,
                     VALUE_BASED_ANNOTATION,
-                    RESTRICTED_ANNOTATION));
+                    RESTRICTED_ANNOTATION,
+                    REQUIRES_IDENTITY_ANNOTATION));
 
     private void stripNonExistentAnnotations(LoadDescriptions data) {
         Set<String> allClasses = data.classes.name2Class.keySet();
@@ -986,6 +993,12 @@ public class CreateSymbols {
         if (desc.runtimeAnnotations != null && !desc.runtimeAnnotations.isEmpty()) {
             builder.accept(RuntimeVisibleAnnotationsAttribute.of(createAnnotations(desc.runtimeAnnotations)));
         }
+        if (desc.classTypeAnnotations != null && !desc.classTypeAnnotations.isEmpty()) {
+            builder.accept(RuntimeInvisibleTypeAnnotationsAttribute.of(createTypeAnnotations(desc.classTypeAnnotations)));
+        }
+        if (desc.runtimeTypeAnnotations != null && !desc.runtimeTypeAnnotations.isEmpty()) {
+            builder.accept(RuntimeVisibleTypeAnnotationsAttribute.of(createTypeAnnotations(desc.runtimeTypeAnnotations)));
+        }
     }
 
     private List<Annotation> createAnnotations(List<AnnotationDescription> desc) {
@@ -1021,6 +1034,12 @@ public class CreateSymbols {
             annotationType = VALUE_BASED_ANNOTATION_INTERNAL;
         }
 
+        if (REQUIRES_IDENTITY_ANNOTATION.equals(annotationType)) {
+            //the non-public RequiresIdentity annotation will not be available in ct.sym,
+            //replace with purely synthetic javac-internal annotation:
+            annotationType = REQUIRES_IDENTITY_ANNOTATION_INTERNAL;
+        }
+
         if (RESTRICTED_ANNOTATION.equals(annotationType)) {
             //the non-public Restricted annotation will not be available in ct.sym,
             //replace with purely synthetic javac-internal annotation:
@@ -1055,6 +1074,44 @@ public class CreateSymbols {
             default -> throw new IllegalArgumentException(value.getClass().getName());
         };
     }
+
+    private List<TypeAnnotation> createTypeAnnotations(List<TypeAnnotationDescription> desc) {
+        return desc.stream().map(this::createTypeAnnotation).collect(Collectors.toList());
+    }
+
+    private TypeAnnotation createTypeAnnotation(TypeAnnotationDescription desc) {
+        Annotation baseAnn = createAnnotation(desc.annotation);
+        TargetInfo targetInfo = switch ((String) desc.targetInfo.get("targetType")) {
+            case "CLASS_TYPE_PARAMETER" -> //TODO: test!
+                TargetInfo.ofClassTypeParameter((int) desc.targetInfo.get("typeParameterIndex"));
+            case "METHOD_TYPE_PARAMETER" ->
+                TargetInfo.ofMethodTypeParameter((int) desc.targetInfo.get("typeParameterIndex"));
+            case "CLASS_EXTENDS" ->
+                TargetInfo.ofClassExtends((int) desc.targetInfo.get("supertypeIndex"));
+            case "CLASS_TYPE_PARAMETER_BOUND" ->
+                TargetInfo.ofClassTypeParameterBound((int) desc.targetInfo.get("typeParameterIndex"),
+                                                     (int) desc.targetInfo.get("boundIndex"));
+            case "METHOD_TYPE_PARAMETER_BOUND" ->
+                TargetInfo.ofMethodTypeParameterBound((int) desc.targetInfo.get("typeParameterIndex"),
+                                                      (int) desc.targetInfo.get("boundIndex"));
+            case "METHOD_RETURN" ->
+                TargetInfo.ofMethodReturn();
+            case "METHOD_RECEIVER" ->
+                TargetInfo.ofMethodReceiver();
+            case "METHOD_FORMAL_PARAMETER" ->
+                TargetInfo.ofMethodFormalParameter((int) desc.targetInfo.get("formalParameterIndex"));
+            case "THROWS" ->
+                TargetInfo.ofThrows((int) desc.targetInfo.get("throwsTargetIndex"));
+            case "FIELD" ->
+                TargetInfo.ofField();
+            case String targetType ->
+                throw new IllegalStateException("Unsupported targetType: " + targetType);
+        };
+
+        List<TypePathComponent> typePath = desc.typePath.stream().map(d -> TypePathComponent.of(TypePathComponent.Kind.valueOf(d.tag()), d.index())).toList();
+
+        return TypeAnnotation.of(targetInfo, typePath, baseAnn);
+    }
     //</editor-fold>
     //</editor-fold>
 
@@ -2202,6 +2259,10 @@ public class CreateSymbols {
                 chd.permittedSubclasses = a.permittedSubclasses().stream().map(ClassEntry::asInternalName).collect(Collectors.toList());
             }
             case ModuleMainClassAttribute a -> ((ModuleHeaderDescription) feature).moduleMainClass = a.mainClass().asInternalName();
+            case RuntimeInvisibleTypeAnnotationsAttribute a ->
+                feature.classTypeAnnotations = typeAnnotations2Descriptions(a.annotations());
+            case RuntimeVisibleTypeAnnotationsAttribute a ->
+                feature.runtimeTypeAnnotations = typeAnnotations2Descriptions(a.annotations());
             default -> throw new IllegalArgumentException("Unhandled attribute: " + attr.attributeName()); // Do nothing
         }
 
@@ -2258,6 +2319,31 @@ public class CreateSymbols {
 
         return new AnnotationDescription(annotationType, values);
     }
+
+    private List<TypeAnnotationDescription> typeAnnotations2Descriptions(List<TypeAnnotation> annos) {
+        return annos.stream().map(ta -> {
+            TypeAnnotationDescription desc = new TypeAnnotationDescription();
+            desc.annotation = annotation2Description(ta.annotation());
+            desc.targetInfo = new HashMap<>();
+            desc.targetInfo.put("targetType", ta.targetInfo().targetType().name());
+            switch (ta.targetInfo()) {
+                case TypeAnnotation.TypeParameterTarget tpt -> desc.targetInfo.put("typeParameterIndex", tpt.typeParameterIndex());
+                case TypeAnnotation.SupertypeTarget st -> desc.targetInfo.put("supertypeIndex", st.supertypeIndex());
+                case TypeAnnotation.TypeParameterBoundTarget tpbt -> {
+                    desc.targetInfo.put("typeParameterIndex", tpbt.typeParameterIndex());
+                    desc.targetInfo.put("boundIndex", tpbt.boundIndex());
+                }
+                case TypeAnnotation.EmptyTarget _ -> {
+                    // nothing to write
+                }
+                case TypeAnnotation.FormalParameterTarget fpt -> desc.targetInfo.put("formalParameterIndex", fpt.formalParameterIndex());
+                case TypeAnnotation.ThrowsTarget tt -> desc.targetInfo.put("throwsTargetIndex", tt.throwsTargetIndex());
+                default -> throw new IllegalStateException(ta.targetInfo().targetType().name());
+            }
+            desc.typePath = ta.targetPath().stream().map(tpc -> new TypeAnnotationDescription.TypePathComponentDesc(tpc.typePathKind().name(), tpc.typeArgumentIndex())).toList();
+            return desc;
+        }).toList();
+    }
     //</editor-fold>
 
     protected boolean includeEffectiveAccess(ClassList classes, ClassDescription clazz) {
@@ -2379,6 +2465,8 @@ public class CreateSymbols {
         String versions = "";
         List<AnnotationDescription> classAnnotations;
         List<AnnotationDescription> runtimeAnnotations;
+        List<TypeAnnotationDescription> classTypeAnnotations;
+        List<TypeAnnotationDescription> runtimeTypeAnnotations;
 
         protected void writeAttributes(Appendable output) throws IOException {
             if (flags != 0)
@@ -2401,6 +2489,18 @@ public class CreateSymbols {
                     output.append(quote(a.toString(), false));
                 }
             }
+            if (classTypeAnnotations != null && !classTypeAnnotations.isEmpty()) {
+                output.append(" classTypeAnnotations ");
+                for (TypeAnnotationDescription a : classTypeAnnotations) {
+                    output.append(quote(a.toString(), false));
+                }
+            }
+            if (runtimeTypeAnnotations != null && !runtimeTypeAnnotations.isEmpty()) {
+                output.append(" runtimeTypeAnnotations ");
+                for (TypeAnnotationDescription a : runtimeTypeAnnotations) {
+                    output.append(quote(a.toString(), false));
+                }
+            }
         }
 
         protected boolean shouldIgnore(String baselineVersion, String version) {
@@ -2430,6 +2530,14 @@ public class CreateSymbols {
             if (inRuntimeAnnotations != null) {
                 runtimeAnnotations = parseAnnotations(inRuntimeAnnotations, new int[1]);
             }
+            String inClassTypeAnnotations = reader.attributes.get("classTypeAnnotations");
+            if (inClassTypeAnnotations != null) {
+                classTypeAnnotations = parseTypeAnnotations(inClassTypeAnnotations, new int[1]);
+            }
+            String inRuntimeTypeAnnotations = reader.attributes.get("runtimeTypeAnnotations");
+            if (inRuntimeTypeAnnotations != null) {
+                runtimeTypeAnnotations = parseTypeAnnotations(inRuntimeTypeAnnotations, new int[1]);
+            }
         }
 
         public abstract boolean read(LineBasedReader reader) throws IOException;
@@ -2442,6 +2550,8 @@ public class CreateSymbols {
             hash = 89 * hash + Objects.hashCode(this.signature);
             hash = 89 * hash + listHashCode(this.classAnnotations);
             hash = 89 * hash + listHashCode(this.runtimeAnnotations);
+            hash = 89 * hash + listHashCode(this.classTypeAnnotations);
+            hash = 89 * hash + listHashCode(this.runtimeTypeAnnotations);
             return hash;
         }
 
@@ -2469,6 +2579,12 @@ public class CreateSymbols {
             if (!listEquals(this.runtimeAnnotations, other.runtimeAnnotations)) {
                 return false;
             }
+            if (!listEquals(this.classTypeAnnotations, other.classTypeAnnotations)) {
+                return false;
+            }
+            if (!listEquals(this.runtimeTypeAnnotations, other.runtimeTypeAnnotations)) {
+                return false;
+            }
             return true;
         }
 
@@ -3273,6 +3389,8 @@ public class CreateSymbols {
             hash = 59 * hash + Objects.hashCode(this.descriptor);
             hash = 59 * hash + Objects.hashCode(this.thrownTypes);
             hash = 59 * hash + Objects.hashCode(this.annotationDefaultValue);
+            hash = 59 * hash + Objects.hashCode(this.classParameterAnnotations);
+            hash = 59 * hash + Objects.hashCode(this.runtimeParameterAnnotations);
             return hash;
         }
 
@@ -3297,6 +3415,12 @@ public class CreateSymbols {
             if (!Objects.equals(this.annotationDefaultValue, other.annotationDefaultValue)) {
                 return false;
             }
+            if (!Objects.equals(this.classParameterAnnotations, other.classParameterAnnotations)) {
+                return false;
+            }
+            if (!Objects.equals(this.runtimeParameterAnnotations, other.runtimeParameterAnnotations)) {
+                return false;
+            }
             return true;
         }
 
@@ -3624,6 +3748,40 @@ public class CreateSymbols {
         }
     }
 
+    static final class TypeAnnotationDescription {
+        AnnotationDescription annotation;
+        Map<String, Object> targetInfo;
+        List<TypePathComponentDesc> typePath;
+
+        public TypeAnnotationDescription() {
+        }
+
+        public TypeAnnotationDescription(AnnotationDescription annotation, Map<String, Object> targetInfo, List<TypePathComponentDesc> typePath) {
+            this.annotation = annotation;
+            this.targetInfo = targetInfo;
+            this.typePath = typePath;
+        }
+
+        @Override
+        public String toString() {
+            return annotation.toString() + "{" + targetInfo.entrySet().stream().map(e -> e.getKey() + "=" + quote(printValue(e.getValue()), false)).collect(Collectors.joining(",")) + "}" +
+                                           (!typePath.isEmpty() ? "[" + typePath.stream().map(desc -> desc.tag + ":" + desc.index).collect(Collectors.joining(",")) + "]" : "");
+        }
+
+        private String printValue(Object obj) {
+            if (obj instanceof String s) {
+                return "\"" + s + "\"";
+            } else if (obj instanceof Integer i) {
+                return "I" + String.valueOf(i);
+            } else {
+                throw new IllegalStateException("Unsupported value: " + obj.getClass());
+            }
+        }
+
+        //TODO: path
+        record TypePathComponentDesc(String tag, int index) {}
+    }
+
     static final class EnumConstant {
         String type;
         String constant;
@@ -3963,23 +4121,69 @@ public class CreateSymbols {
 
     private static AnnotationDescription parseAnnotation(String value, int[] valuePointer) {
         String className = className(value, valuePointer);
-        Map<String, Object> attribute2Value = new HashMap<>();
+        Map<String, Object> attribute2Value = Map.of();
 
         if (valuePointer[0] < value.length() && value.charAt(valuePointer[0]) == '(') {
-            while (value.charAt(valuePointer[0]) != ')') {
+            attribute2Value = parseMap(value, valuePointer, ')');
+        }
+
+        return new AnnotationDescription(className, attribute2Value);
+    }
+
+    private static Map<String, Object> parseMap(String value, int[] valuePointer, char endBracket) {
+        Map<String, Object> attribute2Value = new HashMap<>();
+
+        while (value.charAt(valuePointer[0]) != endBracket) {
+            int nameStart = ++valuePointer[0];
+
+            while (value.charAt(valuePointer[0]++) != '=');
+
+            String name = value.substring(nameStart, valuePointer[0] - 1);
+
+            attribute2Value.put(name, parseAnnotationValue(value, valuePointer));
+        }
+
+        valuePointer[0]++;
+
+        return attribute2Value;
+    }
+
+    public static List<TypeAnnotationDescription> parseTypeAnnotations(String encoded, int[] pointer) {
+        List<TypeAnnotationDescription> result = new ArrayList<>();
+
+        while (pointer[0] < encoded.length() && encoded.charAt(pointer[0]) == '@') {
+            pointer[0]++;
+            result.add(parseTypeAnnotation(encoded, pointer));
+        }
+
+        return result;
+    }
+
+    private static TypeAnnotationDescription parseTypeAnnotation(String value, int[] valuePointer) {
+        AnnotationDescription ann = parseAnnotation(value, valuePointer);
+        Map<String, Object> targetInfo = Map.of();
+
+        if (valuePointer[0] < value.length() && value.charAt(valuePointer[0]) == '{') {
+            targetInfo = parseMap(value, valuePointer, '}');
+        }
+
+        List<TypeAnnotationDescription.TypePathComponentDesc> typePath = new ArrayList<>();
+
+        if (valuePointer[0] < value.length() && value.charAt(valuePointer[0]) == '[') {
+            while (value.charAt(valuePointer[0]) != ']') {
                 int nameStart = ++valuePointer[0];
 
-                while (value.charAt(valuePointer[0]++) != '=');
+                while (value.charAt(valuePointer[0]++) != ':');
 
                 String name = value.substring(nameStart, valuePointer[0] - 1);
 
-                attribute2Value.put(name, parseAnnotationValue(value, valuePointer));
+                typePath.add(new TypeAnnotationDescription.TypePathComponentDesc(name, Integer.parseInt(readDigits(value, valuePointer))));
             }
 
             valuePointer[0]++;
         }
 
-        return new AnnotationDescription(className, attribute2Value);
+        return new TypeAnnotationDescription(ann, targetInfo, typePath);
     }
     //</editor-fold>
 

make/langtools/tools/propertiesparser/gen/ClassGenerator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -47,6 +47,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Properties;
@@ -93,7 +94,9 @@ public class ClassGenerator {
         FACTORY_FIELD_LINT("factory.decl.field.lint"),
         WILDCARDS_EXTENDS("wildcards.extends"),
         SUPPRESS_WARNINGS("suppress.warnings"),
-        LINT_CATEGORY("lint.category");
+        LINT_CATEGORY("lint.category"),
+        DIAGNOSTIC_FLAGS_EMPTY("diagnostic.flags.empty"),
+        DIAGNOSTIC_FLAGS_NON_EMPTY("diagnostic.flags.non-empty");
 
         /** stub key (as it appears in the property file) */
         String key;
@@ -259,17 +262,30 @@ public class ClassGenerator {
                 .map(MessageLine::lintCategory)
                 .findFirst().orElse(null);
         //System.out.println("category for " + key + " = " + lintCategory);
+        String diagnosticFlags = lines.stream()
+                .filter(MessageLine::isDiagnosticFlags)
+                .map(MessageLine::diagnosticFlags)
+                .flatMap(Stream::of)
+                .map(s -> s.replace('-', '_'))
+                .map(s -> s.toUpperCase(Locale.ROOT))
+                .collect(Collectors.joining(", "));
         String factoryName = factoryName(key);
         if (msgInfo.getTypes().isEmpty()) {
             //generate field
             String factoryField;
             if (lintCategory == null) {
                 factoryField = StubKind.FACTORY_FIELD.format(k.keyClazz, factoryName,
+                        diagnosticFlags.isEmpty() ?
+                          StubKind.DIAGNOSTIC_FLAGS_EMPTY.format() :
+                          StubKind.DIAGNOSTIC_FLAGS_NON_EMPTY.format(diagnosticFlags),
                         "\"" + keyParts[0] + "\"",
                         "\"" + Stream.of(keyParts).skip(2).collect(Collectors.joining(".")) + "\"",
                         javadoc);
             } else {
                 factoryField = StubKind.FACTORY_FIELD_LINT.format(k.keyClazz, factoryName,
+                        diagnosticFlags.isEmpty() ?
+                          StubKind.DIAGNOSTIC_FLAGS_EMPTY.format() :
+                          StubKind.DIAGNOSTIC_FLAGS_NON_EMPTY.format(diagnosticFlags),
                         StubKind.LINT_CATEGORY.format("\"" + lintCategory + "\""),
                         "\"" + keyParts[0] + "\"",
                         "\"" + Stream.of(keyParts).skip(2).collect(Collectors.joining(".")) + "\"",
@@ -287,11 +303,17 @@ public class ClassGenerator {
                 String methodBody;
                 if (lintCategory == null) {
                     methodBody = StubKind.FACTORY_METHOD_BODY.format(k.keyClazz,
+                            diagnosticFlags.isEmpty() ?
+                              StubKind.DIAGNOSTIC_FLAGS_EMPTY.format() :
+                              StubKind.DIAGNOSTIC_FLAGS_NON_EMPTY.format(diagnosticFlags),
                             "\"" + keyParts[0] + "\"",
                             "\"" + Stream.of(keyParts).skip(2).collect(Collectors.joining(".")) + "\"",
                             argNames.stream().collect(Collectors.joining(", ")));
                 } else {
                     methodBody = StubKind.FACTORY_METHOD_BODY_LINT.format(k.keyClazz,
+                            diagnosticFlags.isEmpty() ?
+                              StubKind.DIAGNOSTIC_FLAGS_EMPTY.format() :
+                              StubKind.DIAGNOSTIC_FLAGS_NON_EMPTY.format(diagnosticFlags),
                             StubKind.LINT_CATEGORY.format("\"" + lintCategory + "\""),
                             "\"" + keyParts[0] + "\"",
                             "\"" + Stream.of(keyParts).skip(2).collect(Collectors.joining(".")) + "\"",

make/langtools/tools/propertiesparser/parser/Message.java

@@ -32,7 +32,8 @@ import java.util.List;
  * A message within the message file.
  * A message is a series of lines containing a "name=value" property,
  * optionally preceded by a comment describing the use of placeholders
- * such as {0}, {1}, etc within the property value.
+ * such as {0}, {1}, etc within the property value, a lint category,
+ * and/or a list of diagnostic flags.
  */
 public final class Message {
     final MessageLine firstLine;
@@ -49,7 +50,7 @@ public final class Message {
     public MessageInfo getMessageInfo() {
         if (messageInfo == null) {
             MessageLine l = firstLine.prev;
-            if (l != null && l.isLint()) {
+            while (l != null && (l.isLint() || l.isDiagnosticFlags())) {
                 l = l.prev;
             }
             if (l != null && l.isInfo())
@@ -74,7 +75,7 @@ public final class Message {
             while (l.text.isEmpty())
                 l = l.next;
         } else {
-            if (l.prev != null && (l.prev.isInfo() || l.prev.isLint()))
+            while (l.prev != null && (l.prev.isInfo() || l.prev.isLint() || l.prev.isDiagnosticFlags()))
                 l = l.prev;
         }
 

make/langtools/tools/propertiesparser/parser/MessageLine.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,6 +25,7 @@
 
 package propertiesparser.parser;
 
+import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -39,6 +40,7 @@ public class MessageLine {
     static final Pattern infoPattern = Pattern.compile(String.format("# ([0-9]+: %s, )*[0-9]+: %s",
             typePattern.pattern(), typePattern.pattern()));
     static final Pattern lintPattern = Pattern.compile("# lint: ([a-z\\-]+)");
+    static final Pattern diagnosticFlagsPattern = Pattern.compile("# flags: ([a-z\\-]+(, ([a-z\\-]+))*)");
 
     public String text;
     MessageLine prev;
@@ -69,6 +71,19 @@ public class MessageLine {
         }
     }
 
+    public boolean isDiagnosticFlags() {
+        return diagnosticFlagsPattern.matcher(text).matches();
+    }
+
+    public String[] diagnosticFlags() {
+        Matcher matcher = diagnosticFlagsPattern.matcher(text);
+        if (matcher.matches()) {
+            return matcher.group(1).split(", ", -1);
+        } else {
+            return null;
+        }
+    }
+
     boolean hasContinuation() {
         return (next != null) && text.endsWith("\\");
     }

make/langtools/tools/propertiesparser/resources/templates.properties

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -27,6 +27,7 @@ toplevel.decl=\
     package {0};\n\
     \n\
     {1}\n\
+    import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;\n\
     import com.sun.tools.javac.util.JCDiagnostic.Error;\n\
     import com.sun.tools.javac.util.JCDiagnostic.Warning;\n\
     import com.sun.tools.javac.util.JCDiagnostic.LintWarning;\n\
@@ -34,6 +35,10 @@ toplevel.decl=\
     import com.sun.tools.javac.util.JCDiagnostic.Fragment;\n\
     import com.sun.tools.javac.code.Lint.LintCategory;\n\
     \n\
+    import java.util.EnumSet;\n\
+    \n\
+    import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*;\n\
+    \n\
     public class {2} '{'\n\
     {3}\n\
     '}'\n
@@ -58,22 +63,22 @@ factory.decl.method.arg=\
     arg{0}
 
 factory.decl.method.body=\
-    return new {0}({1}, {2}, {3});
+    return new {0}({1}, {2}, {3}, {4});
 
 factory.decl.method.body.lint=\
-    return new {0}({1}, {2}, {3}, {4});
+    return new {0}({1}, {2}, {3}, {4}, {5});
 
 factory.decl.field=\
     /**\n\
     ' '* {4}\n\
     ' '*/\n\
-    public static final {0} {1} = new {0}({2}, {3});
+    public static final {0} {1} = new {0}({2}, {3}, {4});
 
 factory.decl.field.lint=\
     /**\n\
     ' '* {5}\n\
     ' '*/\n\
-    public static final {0} {1} = new {0}({2}, {3}, {4});
+    public static final {0} {1} = new {0}({2}, {3}, {4}, {5});
 
 wildcards.extends=\
     {0}<? extends {1}>
@@ -84,3 +89,9 @@ suppress.warnings=\
 lint.category=\
   LintCategory.get({0}).get()
 
+diagnostic.flags.empty=\
+  EnumSet.noneOf(DiagnosticFlag.class)
+
+diagnostic.flags.non-empty=\
+  EnumSet.of({0})
+

make/modules/java.base/Gensrc.gmk

@@ -46,6 +46,8 @@ CLDR_GEN_DONE := $(GENSRC_DIR)/_cldr-gensrc.marker
 TZ_DATA_DIR := $(MODULE_SRC)/share/data/tzdata
 ZONENAME_TEMPLATE := $(MODULE_SRC)/share/classes/java/time/format/ZoneName.java.template
 
+# The `-utf8` option is used even for US English, as some names
+# may contain non-ASCII characters, such as “Türkiye”.
 $(CLDR_GEN_DONE): $(wildcard $(CLDR_DATA_DIR)/dtd/*.dtd) \
     $(wildcard $(CLDR_DATA_DIR)/main/en*.xml) \
     $(wildcard $(CLDR_DATA_DIR)/supplemental/*.xml) \
@@ -61,7 +63,8 @@ $(CLDR_GEN_DONE): $(wildcard $(CLDR_DATA_DIR)/dtd/*.dtd) \
 	    -basemodule \
 	    -year $(COPYRIGHT_YEAR) \
 	    -zntempfile $(ZONENAME_TEMPLATE) \
-	    -tzdatadir $(TZ_DATA_DIR))
+	    -tzdatadir $(TZ_DATA_DIR) \
+	    -utf8)
 	$(TOUCH) $@
 
 TARGETS += $(CLDR_GEN_DONE)

make/modules/java.base/gensrc/GensrcRegex.gmk

@@ -50,5 +50,22 @@ TARGETS += $(GENSRC_INDICCONJUNCTBREAK)
 
 ################################################################################
 
+GENSRC_CASEFOLDING := $(SUPPORT_OUTPUTDIR)/gensrc/java.base/jdk/internal/util/regex/CaseFolding.java
+
+CASEFOLDINGTEMP := $(MODULE_SRC)/share/classes/jdk/internal/util/regex/CaseFolding.java.template
+CASEFOLDINGTXT := $(MODULE_SRC)/share/data/unicodedata/CaseFolding.txt
+
+$(GENSRC_CASEFOLDING): $(BUILD_TOOLS_JDK) $(CASEFOLDINGTEMP) $(CASEFOLDINGTXT)
+	$(call LogInfo, Generating $@)
+	$(call MakeTargetDir)
+	$(TOOL_GENERATECASEFOLDING) \
+	    $(CASEFOLDINGTEMP) \
+	    $(CASEFOLDINGTXT) \
+	    $(GENSRC_CASEFOLDING)
+
+TARGETS += $(GENSRC_CASEFOLDING)
+
+################################################################################
+
 endif # include guard
 include MakeIncludeEnd.gmk

make/modules/java.desktop/lib/AwtLibraries.gmk

@@ -278,7 +278,6 @@ ifeq ($(call isTargetOs, windows macosx)+$(ENABLE_HEADLESS_ONLY), false+false)
       DISABLED_WARNINGS_gcc_X11TextRenderer_md.c := unused-but-set-variable, \
       DISABLED_WARNINGS_gcc_XlibWrapper.c := type-limits pointer-to-int-cast, \
       DISABLED_WARNINGS_gcc_XRBackendNative.c := maybe-uninitialized, \
-      DISABLED_WARNINGS_gcc_XToolkit.c := unused-result, \
       DISABLED_WARNINGS_gcc_XWindow.c := unused-function, \
       DISABLED_WARNINGS_clang_awt_Taskbar.c := parentheses, \
       DISABLED_WARNINGS_clang_gtk3_interface.c := unused-function parentheses, \

make/modules/jdk.jdwp.agent/Lib.gmk

@@ -68,6 +68,7 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBJDWP, \
     DISABLED_WARNINGS_clang_threadControl.c := unused-but-set-variable \
         unused-variable, \
     DISABLED_WARNINGS_clang_utf_util.c := unused-but-set-variable, \
+    DISABLED_WARNINGS_microsoft_debugInit.c := 5287, \
     LDFLAGS := $(ICONV_LDFLAGS), \
     EXTRA_HEADER_DIRS := \
         include \

make/modules/jdk.localedata/Gensrc.gmk

@@ -45,7 +45,8 @@ $(CLDR_GEN_DONE): $(wildcard $(CLDR_DATA_DIR)/dtd/*.dtd) \
 	    -baselocales "en-US" \
 	    -year $(COPYRIGHT_YEAR) \
 	    -o $(GENSRC_DIR) \
-	    -tzdatadir $(TZ_DATA_DIR))
+	    -tzdatadir $(TZ_DATA_DIR) \
+	    -utf8)
 	$(TOUCH) $@
 
 TARGETS += $(CLDR_GEN_DONE)

make/test/BuildMicrobenchmark.gmk

@@ -92,6 +92,7 @@ $(eval $(call SetupJavaCompilation, BUILD_JDK_MICROBENCHMARK, \
         --add-exports java.base/jdk.internal.classfile.impl=ALL-UNNAMED \
         --add-exports java.base/jdk.internal.event=ALL-UNNAMED \
         --add-exports java.base/jdk.internal.foreign=ALL-UNNAMED \
+        --add-exports java.base/jdk.internal.jimage=ALL-UNNAMED \
         --add-exports java.base/jdk.internal.misc=ALL-UNNAMED \
         --add-exports java.base/jdk.internal.util=ALL-UNNAMED \
         --add-exports java.base/jdk.internal.vm=ALL-UNNAMED \

make/test/JtregNativeJdk.gmk

@@ -62,7 +62,7 @@ BUILD_JDK_JTREG_LIBRARIES_JDK_LIBS_libGetXSpace := java.base:libjava
 ifeq ($(call isTargetOs, windows), true)
   BUILD_JDK_JTREG_EXCLUDE += libDirectIO.c libInheritedChannel.c \
       libExplicitAttach.c libImplicitAttach.c \
-      exelauncher.c
+      exelauncher.c libFDLeaker.c exeFDLeakTester.c
 
   BUILD_JDK_JTREG_EXECUTABLES_LIBS_exeNullCallerTest := $(LIBCXX)
   BUILD_JDK_JTREG_EXECUTABLES_LIBS_exerevokeall := advapi32.lib

src/demo/share/java2d/J2DBench/Makefile

@@ -31,10 +31,10 @@
 
 
 ifndef SOURCE
-export SOURCE := 7
+export SOURCE := 8
 endif
 ifndef TARGET
-export TARGET := 7
+export TARGET := 8
 endif
 ifndef JAVAC
 export JAVAC := javac

src/demo/share/java2d/J2DBench/build.xml

@@ -39,12 +39,12 @@
   <property name="dist"  location="dist"/>
   <property name="resources"  location="resources"/>
 
-  <condition property="source" value="7">
+  <condition property="source" value="8">
      <not>
         <isset property="source"/>
      </not>
   </condition>
-  <condition property="target" value="7">
+  <condition property="target" value="8">
      <not>
         <isset property="target"/>
      </not>
@@ -54,11 +54,6 @@
         <isset property="java"/>
      </not>
   </condition>
-  <condition property="javac" value="javac">
-     <not>
-        <isset property="javac"/>
-     </not>
-  </condition>
 
   <target name="init">
     <!-- Create the time stamp -->
@@ -70,7 +65,7 @@
   <target name="compile" depends="init"
         description="compile the source " >
     <!-- Compile the java code from ${src} into ${build} -->
-    <javac debug="off" source="${source}" target="${target}" srcdir="${src}" destdir="${build}" fork="true" executable="${javac}"/>
+    <javac debug="off" source="${source}" target="${target}" srcdir="${src}" destdir="${build}"/>
   </target>
 
   <target name="run" depends="dist"

src/demo/share/java2d/J2DBench/src/j2dbench/report/J2DAnalyzer.java

@@ -270,7 +270,7 @@ public class J2DAnalyzer {
             } else {
                 double overallscore = totalscore[i]/numtests[i];
                 System.out.println("    Number of tests:  "+numtests[i]);
-                System.out.println("    Overall average:  "+overallscore);
+                System.out.printf( "    Overall average:  %-10.4f%n", overallscore);
                 System.out.println("    Best spread:      "+bestspread[i]+
                                    "% variance");
                 System.out.println("    Worst spread:     "+worstspread[i]+

src/demo/share/jfc/J2Ddemo/java2d/RunWindow.java

@@ -362,7 +362,7 @@ public class RunWindow extends JPanel implements Runnable, ActionListener {
     /**
      * This class contains initial values for instance variables of 'RunWindow' class,
      * and its instance is used in creation of 'RunWindow' object. Values parsed from
-     * certain command line options of the demo or from the demo applet parameters are
+     * certain command line options of the demo
      * set to the fields of this class instance. It is a part of the fix which changed
      * static variables for instance variables in certain demo classes.
      *

src/demo/share/jfc/J2Ddemo/java2d/Tools.java

@@ -406,13 +406,6 @@ public final class Tools extends JPanel implements ActionListener,
             if (pDialogState) {
                 printJob.print(aset);
             }
-        } catch (@SuppressWarnings("removal") java.security.AccessControlException ace) {
-            String errmsg = "Applet access control exception; to allow "
-                    + "access to printer, set\n"
-                    + "permission for \"queuePrintJob\" in "
-                    + "RuntimePermission.";
-            JOptionPane.showMessageDialog(this, errmsg, "Printer Access Error",
-                    JOptionPane.ERROR_MESSAGE);
         } catch (Exception ex) {
             Logger.getLogger(Tools.class.getName()).log(Level.SEVERE,
                     null, ex);

src/demo/share/jfc/Stylepad/HelloWorld.java

@@ -187,22 +187,18 @@ public class HelloWorld {
             new Run("none", "Hello from Cupertino")
         }),
         new Paragraph("title", new Run[] {
-            new Run("none", "\u53F0\u5317\u554F\u5019\u60A8\u0021")
+            new Run("none", "台北問候您!")
         }),
         new Paragraph("title", new Run[] {
-            new Run("none", "\u0391\u03B8\u03B7\u03BD\u03B1\u03B9\u0020" // Greek
-            + "\u03B1\u03C3\u03C0\u03B1\u03B6\u03BF\u03BD"
-            + "\u03C4\u03B1\u03B9\u0020\u03C5\u03BC\u03B1"
-            + "\u03C2\u0021")
+            new Run("none", "Αθηναι ασπαζονται υμας!") // Greek
         }),
         new Paragraph("title", new Run[] {
-            new Run("none", "\u6771\u4eac\u304b\u3089\u4eca\u65e5\u306f")
+            new Run("none", "東京から今日は")
         }),
         new Paragraph("title", new Run[] {
-            new Run("none", "\u05e9\u05dc\u05d5\u05dd \u05de\u05d9\u05e8\u05d5"
-            + "\u05e9\u05dc\u05d9\u05dd")
+            new Run("none", "שלום מירושלים")
         }),
         new Paragraph("title", new Run[] {
-            new Run("none", "\u0633\u0644\u0627\u0645")
+            new Run("none", "سلام")
         }), };
 }

src/demo/share/jfc/SwingSet2/SwingSet2.java

@@ -131,7 +131,7 @@ public class SwingSet2 extends JPanel {
     private JEditorPane demoSrcPane = null;
 
 
-    // contentPane cache, saved from the applet or application frame
+    // contentPane cache, saved from the application frame
     Container contentPane = null;
 
 
@@ -177,7 +177,7 @@ public class SwingSet2 extends JPanel {
 
 
     /**
-     * SwingSet2 Main. Called only if we're an application, not an applet.
+     * SwingSet2 Main.
      */
     public static void main(final String[] args) {
         // must run in EDT when constructing the GUI components
@@ -716,8 +716,7 @@ public class SwingSet2 extends JPanel {
     }
 
     /**
-     * Returns the content pane whether we're in an applet
-     * or application
+     * Returns the content pane
      */
     public Container getContentPane() {
         if(contentPane == null) {

src/demo/share/jfc/SwingSet2/resources/swingset_de.properties

@@ -456,13 +456,13 @@ SliderDemo.horizontal=Horizontal
 SliderDemo.vertical=Vertikal
 SliderDemo.plain=Einfach
 SliderDemo.a_plain_slider=Ein einfacher Schieberegler
-SliderDemo.majorticks=Grobteilungen
-SliderDemo.majorticksdescription=Ein Schieberegler mit Grobteilungsmarkierungen
-SliderDemo.ticks=Feinteilungen, Teilungen zum Einrasten und Labels
-SliderDemo.minorticks=Feinteilungen
-SliderDemo.minorticksdescription=Ein Schieberegler mit Grob- und Feinteilungen, mit Teilungen, in die der Schieberegler einrastet, wobei einige Teilungen mit einem sichtbaren Label versehen sind
+SliderDemo.majorticks=Hauptteilstriche
+SliderDemo.majorticksdescription=Ein Schieberegler mit Hauptteilstrichen
+SliderDemo.ticks=Hilfsteilstriche, zum Einrasten und Beschriften
+SliderDemo.minorticks=Hilfsteilstriche
+SliderDemo.minorticksdescription=Ein Schieberegler mit Haupt- und Hilfsteilstrichen, in die der Schieberegler einrastet, wobei einige Teilstriche mit einer sichtbaren Beschriftung versehen sind
 SliderDemo.disabled=Deaktiviert
-SliderDemo.disableddescription=Ein Schieberegler mit Grob- und Feinteilungen, der nicht aktiviert ist (kann nicht bearbeitet werden)
+SliderDemo.disableddescription=Ein Schieberegler mit Haupt- und Hilfsteilstrichen, der nicht aktiviert ist (kann nicht bearbeitet werden)
 
 ### SplitPane Demo ###
 

src/hotspot/cpu/aarch64/aarch64.ad

@@ -1765,10 +1765,6 @@ void MachPrologNode::emit(C2_MacroAssembler *masm, PhaseRegAlloc *ra_) const {
   // n.b. frame size includes space for return pc and rfp
   const int framesize = C->output()->frame_size_in_bytes();
 
-  // insert a nop at the start of the prolog so we can patch in a
-  // branch if we need to invalidate the method later
-  __ nop();
-
   if (C->clinit_barrier_on_entry()) {
     assert(!C->method()->holder()->is_not_initialized(), "initialization should have been started");
 
@@ -1888,7 +1884,7 @@ void MachEpilogNode::emit(C2_MacroAssembler *masm, PhaseRegAlloc *ra_) const {
       code_stub = &stub->entry();
     }
     __ relocate(relocInfo::poll_return_type);
-    __ safepoint_poll(*code_stub, true /* at_return */, false /* acquire */, true /* in_nmethod */);
+    __ safepoint_poll(*code_stub, true /* at_return */, true /* in_nmethod */);
   }
 }
 
@@ -2366,17 +2362,34 @@ int Matcher::max_vector_size(const BasicType bt) {
 }
 
 int Matcher::min_vector_size(const BasicType bt) {
-  int max_size = max_vector_size(bt);
-  // Limit the min vector size to 8 bytes.
-  int size = 8 / type2aelembytes(bt);
-  if (bt == T_BYTE) {
-    // To support vector api shuffle/rearrange.
-    size = 4;
-  } else if (bt == T_BOOLEAN) {
-    // To support vector api load/store mask.
-    size = 2;
+  // Usually, the shortest vector length supported by AArch64 ISA and
+  // Vector API species is 64 bits. However, we allow 32-bit or 16-bit
+  // vectors in a few special cases.
+  int size;
+  switch(bt) {
+    case T_BOOLEAN:
+      // Load/store a vector mask with only 2 elements for vector types
+      // such as "2I/2F/2L/2D".
+      size = 2;
+      break;
+    case T_BYTE:
+      // Generate a "4B" vector, to support vector cast between "8B/16B"
+      // and "4S/4I/4L/4F/4D".
+      size = 4;
+      break;
+    case T_SHORT:
+      // Generate a "2S" vector, to support vector cast between "4S/8S"
+      // and "2I/2L/2F/2D".
+      size = 2;
+      break;
+    default:
+      // Limit the min vector length to 64-bit.
+      size = 8 / type2aelembytes(bt);
+      // The number of elements in a vector should be at least 2.
+      size = MAX2(size, 2);
   }
-  if (size < 2) size = 2;
+
+  int max_size = max_vector_size(bt);
   return MIN2(size, max_size);
 }
 
@@ -3454,10 +3467,6 @@ encode %{
     __ mov(dst_reg, (uint64_t)1);
   %}
 
-  enc_class aarch64_enc_mov_byte_map_base(iRegP dst, immByteMapBase src) %{
-    __ load_byte_map_base($dst$$Register);
-  %}
-
   enc_class aarch64_enc_mov_n(iRegN dst, immN src) %{
     Register dst_reg = as_Register($dst$$reg);
     address con = (address)$src$$constant;
@@ -3921,6 +3930,10 @@ ins_attrib ins_alignment(4);    // Required alignment attribute (must
                                 // compute_padding() function must be
                                 // provided for the instruction
 
+// Whether this node is expanded during code emission into a sequence of
+// instructions and the first instruction can perform an implicit null check.
+ins_attrib ins_is_late_expanded_null_check_candidate(false);
+
 //----------OPERANDS-----------------------------------------------------------
 // Operand definitions must precede instruction definitions for correct parsing
 // in the ADLC because operands constitute user defined types which are used in
@@ -4554,20 +4567,6 @@ operand immP_1()
   interface(CONST_INTER);
 %}
 
-// Card Table Byte Map Base
-operand immByteMapBase()
-%{
-  // Get base of card map
-  predicate(BarrierSet::barrier_set()->is_a(BarrierSet::CardTableBarrierSet) &&
-            SHENANDOAHGC_ONLY(!BarrierSet::barrier_set()->is_a(BarrierSet::ShenandoahBarrierSet) &&)
-            (CardTable::CardValue*)n->get_ptr() == ((CardTableBarrierSet*)(BarrierSet::barrier_set()))->card_table()->byte_map_base());
-  match(ConP);
-
-  op_cost(0);
-  format %{ %}
-  interface(CONST_INTER);
-%}
-
 // Float and Double operands
 // Double Immediate
 operand immD()
@@ -6854,20 +6853,6 @@ instruct loadConP1(iRegPNoSp dst, immP_1 con)
   ins_pipe(ialu_imm);
 %}
 
-// Load Byte Map Base Constant
-
-instruct loadByteMapBase(iRegPNoSp dst, immByteMapBase con)
-%{
-  match(Set dst con);
-
-  ins_cost(INSN_COST);
-  format %{ "adr  $dst, $con\t# Byte Map Base" %}
-
-  ins_encode(aarch64_enc_mov_byte_map_base(dst, con));
-
-  ins_pipe(ialu_imm);
-%}
-
 // Load Narrow Pointer Constant
 
 instruct loadConN(iRegNNoSp dst, immN con)
@@ -7761,14 +7746,12 @@ instruct popCountI(iRegINoSp dst, iRegIorL2I src, vRegF tmp) %{
   effect(TEMP tmp);
   ins_cost(INSN_COST * 13);
 
-  format %{ "movw   $src, $src\n\t"
-            "mov    $tmp, $src\t# vector (1D)\n\t"
+  format %{ "fmovs  $tmp, $src\t# vector (1S)\n\t"
             "cnt    $tmp, $tmp\t# vector (8B)\n\t"
             "addv   $tmp, $tmp\t# vector (8B)\n\t"
             "mov    $dst, $tmp\t# vector (1D)" %}
   ins_encode %{
-    __ movw($src$$Register, $src$$Register); // ensure top 32 bits 0
-    __ mov($tmp$$FloatRegister, __ D, 0, $src$$Register);
+    __ fmovs($tmp$$FloatRegister, $src$$Register);
     __ cnt($tmp$$FloatRegister, __ T8B, $tmp$$FloatRegister);
     __ addv($tmp$$FloatRegister, __ T8B, $tmp$$FloatRegister);
     __ mov($dst$$Register, $tmp$$FloatRegister, __ D, 0);
@@ -8236,6 +8219,16 @@ instruct castLL_checked(iRegL dst, rFlagsReg cr)
   ins_pipe(pipe_slow);
 %}
 
+instruct castHH(vRegF dst)
+%{
+  match(Set dst (CastHH dst));
+  size(0);
+  format %{ "# castHH of $dst" %}
+  ins_encode(/* empty encoding */);
+  ins_cost(0);
+  ins_pipe(pipe_class_empty);
+%}
+
 instruct castFF(vRegF dst)
 %{
   match(Set dst (CastFF dst));

src/hotspot/cpu/aarch64/aarch64_vector.ad

@@ -1,6 +1,6 @@
 //
 // Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
-// Copyright (c) 2020, 2024, Arm Limited. All rights reserved.
+// Copyright (c) 2020, 2025, Arm Limited. All rights reserved.
 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 //
 // This code is free software; you can redistribute it and/or modify it
@@ -131,7 +131,7 @@ source %{
       // These operations are not profitable to be vectorized on NEON, because no direct
       // NEON instructions support them. But the match rule support for them is profitable for
       // Vector API intrinsics.
-      if ((opcode == Op_VectorCastD2X && bt == T_INT) ||
+      if ((opcode == Op_VectorCastD2X && (bt == T_INT || bt == T_SHORT)) ||
           (opcode == Op_VectorCastL2X && bt == T_FLOAT) ||
           (opcode == Op_CountLeadingZerosV && bt == T_LONG) ||
           (opcode == Op_CountTrailingZerosV && bt == T_LONG) ||
@@ -189,6 +189,18 @@ source %{
           return false;
         }
         break;
+      case Op_AddReductionVI:
+      case Op_AndReductionV:
+      case Op_OrReductionV:
+      case Op_XorReductionV:
+      case Op_MinReductionV:
+      case Op_MaxReductionV:
+        // Reductions with less than 8 bytes vector length are
+        // not supported.
+        if (length_in_bytes < 8) {
+          return false;
+        }
+        break;
       case Op_MulReductionVD:
       case Op_MulReductionVF:
       case Op_MulReductionVI:
@@ -225,6 +237,26 @@ source %{
           return false;
         }
         break;
+      case Op_AddVHF:
+      case Op_SubVHF:
+      case Op_MulVHF:
+      case Op_DivVHF:
+      case Op_MinVHF:
+      case Op_MaxVHF:
+      case Op_SqrtVHF:
+        // FEAT_FP16 is enabled if both "fphp" and "asimdhp" features are supported.
+        // Only the Neon instructions need this check. SVE supports half-precision floats
+        // by default.
+        if (UseSVE == 0 && !is_feat_fp16_supported()) {
+          return false;
+        }
+        break;
+      case Op_FmaVHF:
+        // UseFMA flag needs to be checked along with FEAT_FP16
+        if (!UseFMA || (UseSVE == 0 && !is_feat_fp16_supported())) {
+          return false;
+        }
+        break;
       default:
         break;
     }
@@ -270,6 +302,19 @@ source %{
       case Op_StoreVectorScatter:
         opcode = Op_StoreVectorScatterMasked;
         break;
+      // Currently, the masked versions of the following 8 Float16 operations are disabled.
+      // When the support for Float16 vector classes is added in VectorAPI and the masked
+      // Float16 IR can be generated, these masked operations will be enabled and relevant
+      // backend support added.
+      case Op_AddVHF:
+      case Op_SubVHF:
+      case Op_MulVHF:
+      case Op_DivVHF:
+      case Op_MaxVHF:
+      case Op_MinVHF:
+      case Op_SqrtVHF:
+      case Op_FmaVHF:
+        return false;
       default:
         break;
     }
@@ -583,6 +628,22 @@ instruct vaddL(vReg dst, vReg src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}
 
+instruct vaddHF(vReg dst, vReg src1, vReg src2) %{
+  match(Set dst (AddVHF src1 src2));
+  format %{ "vaddHF $dst, $src1, $src2" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ fadd($dst$$FloatRegister, get_arrangement(this),
+              $src1$$FloatRegister, $src2$$FloatRegister);
+    } else {
+      assert(UseSVE > 0, "must be sve");
+      __ sve_fadd($dst$$FloatRegister, __ H, $src1$$FloatRegister, $src2$$FloatRegister);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 instruct vaddF(vReg dst, vReg src1, vReg src2) %{
   match(Set dst (AddVF src1 src2));
   format %{ "vaddF $dst, $src1, $src2" %}
@@ -807,6 +868,22 @@ instruct vsubL(vReg dst, vReg src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}
 
+instruct vsubHF(vReg dst, vReg src1, vReg src2) %{
+  match(Set dst (SubVHF src1 src2));
+  format %{ "vsubHF $dst, $src1, $src2" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ fsub($dst$$FloatRegister, get_arrangement(this),
+              $src1$$FloatRegister, $src2$$FloatRegister);
+    } else {
+      assert(UseSVE > 0, "must be sve");
+      __ sve_fsub($dst$$FloatRegister, __ H, $src1$$FloatRegister, $src2$$FloatRegister);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 instruct vsubF(vReg dst, vReg src1, vReg src2) %{
   match(Set dst (SubVF src1 src2));
   format %{ "vsubF $dst, $src1, $src2" %}
@@ -1004,6 +1081,22 @@ instruct vmulL_sve(vReg dst_src1, vReg src2) %{
 
 // vector mul - floating-point
 
+instruct vmulHF(vReg dst, vReg src1, vReg src2) %{
+  match(Set dst (MulVHF src1 src2));
+  format %{ "vmulHF $dst, $src1, $src2" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ fmul($dst$$FloatRegister, get_arrangement(this),
+              $src1$$FloatRegister, $src2$$FloatRegister);
+    } else {
+      assert(UseSVE > 0, "must be sve");
+      __ sve_fmul($dst$$FloatRegister, __ H, $src1$$FloatRegister, $src2$$FloatRegister);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 instruct vmulF(vReg dst, vReg src1, vReg src2) %{
   match(Set dst (MulVF src1 src2));
   format %{ "vmulF $dst, $src1, $src2" %}
@@ -1102,6 +1195,28 @@ instruct vmulD_masked(vReg dst_src1, vReg src2, pRegGov pg) %{
 
 // vector float div
 
+instruct vdivHF_neon(vReg dst, vReg src1, vReg src2) %{
+  predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst (DivVHF src1 src2));
+  format %{ "vdivHF_neon $dst, $src1, $src2" %}
+  ins_encode %{
+    __ fdiv($dst$$FloatRegister, get_arrangement(this),
+            $src1$$FloatRegister, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct vdivHF_sve(vReg dst_src1, vReg src2) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst_src1 (DivVHF dst_src1 src2));
+  format %{ "vdivHF_sve $dst_src1, $dst_src1, $src2" %}
+  ins_encode %{
+    assert(UseSVE > 0, "must be sve");
+    __ sve_fdiv($dst_src1$$FloatRegister, __ H, ptrue, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 instruct vdivF_neon(vReg dst, vReg src1, vReg src2) %{
   predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
   match(Set dst (DivVF src1 src2));
@@ -1991,6 +2106,21 @@ instruct vnegD_masked(vReg dst_src, pRegGov pg) %{
 
 // vector sqrt
 
+instruct vsqrtHF(vReg dst, vReg src) %{
+  match(Set dst (SqrtVHF src));
+  format %{ "vsqrtHF $dst, $src" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ fsqrt($dst$$FloatRegister, get_arrangement(this), $src$$FloatRegister);
+    } else {
+      assert(UseSVE > 0, "must be sve");
+      __ sve_fsqrt($dst$$FloatRegister, __ H, ptrue, $src$$FloatRegister);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 instruct vsqrtF(vReg dst, vReg src) %{
   match(Set dst (SqrtVF src));
   format %{ "vsqrtF $dst, $src" %}
@@ -2069,7 +2199,7 @@ instruct vminL_sve(vReg dst_src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}
 
-// vector min - B/S/I/F/D
+// vector min - B/S/I/HF/F/D
 
 instruct vmin_neon(vReg dst, vReg src1, vReg src2) %{
   predicate(Matcher::vector_element_basic_type(n) != T_LONG &&
@@ -2110,6 +2240,29 @@ instruct vmin_sve(vReg dst_src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}
 
+instruct vmin_HF_neon(vReg dst, vReg src1, vReg src2) %{
+  predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst (MinVHF src1 src2));
+  format %{ "vmin_HF_neon $dst, $src1, $src2\t# Half float" %}
+  ins_encode %{
+    __ fmin($dst$$FloatRegister, get_arrangement(this),
+            $src1$$FloatRegister, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct vmin_HF_sve(vReg dst_src1, vReg src2) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst_src1 (MinVHF dst_src1 src2));
+  format %{ "vmin_HF_sve $dst_src1, $dst_src1, $src2\t# Half float" %}
+  ins_encode %{
+    assert(UseSVE > 0, "must be sve");
+    __ sve_fmin($dst_src1$$FloatRegister, __ H,
+                ptrue, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // vector min - predicated
 
 instruct vmin_masked(vReg dst_src1, vReg src2, pRegGov pg) %{
@@ -2226,7 +2379,7 @@ instruct vmaxL_sve(vReg dst_src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}
 
-// vector max - B/S/I/F/D
+// vector max - B/S/I/HF/F/D
 
 instruct vmax_neon(vReg dst, vReg src1, vReg src2) %{
   predicate(Matcher::vector_element_basic_type(n) != T_LONG &&
@@ -2267,6 +2420,29 @@ instruct vmax_sve(vReg dst_src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}
 
+instruct vmax_HF_neon(vReg dst, vReg src1, vReg src2) %{
+  predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst (MaxVHF src1 src2));
+  format %{ "vmax_HF_neon $dst, $src1, $src2\t# Half float" %}
+  ins_encode %{
+    __ fmax($dst$$FloatRegister, get_arrangement(this),
+            $src1$$FloatRegister, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct vmax_HF_sve(vReg dst_src1, vReg src2) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst_src1 (MaxVHF dst_src1 src2));
+  format %{ "vmax_HF_sve $dst_src1, $dst_src1, $src2\t# Half float" %}
+  ins_encode %{
+    assert(UseSVE > 0, "must be sve");
+    __ sve_fmax($dst_src1$$FloatRegister, __ H,
+                ptrue, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // vector max - predicated
 
 instruct vmax_masked(vReg dst_src1, vReg src2, pRegGov pg) %{
@@ -2413,8 +2589,9 @@ instruct vmla_masked(vReg dst_src1, vReg src2, vReg src3, pRegGov pg) %{
 // dst_src1 = src2 * src3 + dst_src1
 
 instruct vfmla(vReg dst_src1, vReg src2, vReg src3) %{
-  match(Set dst_src1 (FmaVF dst_src1 (Binary src2 src3)));
-  match(Set dst_src1 (FmaVD dst_src1 (Binary src2 src3)));
+  match(Set dst_src1 (FmaVHF dst_src1 (Binary src2 src3)));
+  match(Set dst_src1 (FmaVF  dst_src1 (Binary src2 src3)));
+  match(Set dst_src1 (FmaVD  dst_src1 (Binary src2 src3)));
   format %{ "vfmla $dst_src1, $src2, $src3" %}
   ins_encode %{
     assert(UseFMA, "Needs FMA instructions support.");
@@ -4079,8 +4256,8 @@ instruct vzeroExtStoX(vReg dst, vReg src) %{
     assert(bt == T_INT || bt == T_LONG, "must be");
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      // 4S to 4I
-      __ neon_vector_extend($dst$$FloatRegister, T_INT, length_in_bytes,
+      // 2S to 2I/2L, 4S to 4I
+      __ neon_vector_extend($dst$$FloatRegister, bt, length_in_bytes,
                             $src$$FloatRegister, T_SHORT, /* is_unsigned */ true);
     } else {
       assert(UseSVE > 0, "must be sve");
@@ -4100,11 +4277,11 @@ instruct vzeroExtItoX(vReg dst, vReg src) %{
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
       // 2I to 2L
-      __ neon_vector_extend($dst$$FloatRegister, T_LONG, length_in_bytes,
+      __ neon_vector_extend($dst$$FloatRegister, bt, length_in_bytes,
                             $src$$FloatRegister, T_INT, /* is_unsigned */ true);
     } else {
       assert(UseSVE > 0, "must be sve");
-      __ sve_vector_extend($dst$$FloatRegister, __ D,
+      __ sve_vector_extend($dst$$FloatRegister, __ elemType_to_regVariant(bt),
                            $src$$FloatRegister, __ S, /* is_unsigned */ true);
     }
   %}
@@ -4178,11 +4355,15 @@ instruct vcvtStoX_extend(vReg dst, vReg src) %{
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      // 4S to 4I/4F
-      __ neon_vector_extend($dst$$FloatRegister, T_INT, length_in_bytes,
-                            $src$$FloatRegister, T_SHORT);
-      if (bt == T_FLOAT) {
-        __ scvtfv(__ T4S, $dst$$FloatRegister, $dst$$FloatRegister);
+      if (is_floating_point_type(bt)) {
+        // 2S to 2F/2D, 4S to 4F
+        __ neon_vector_extend($dst$$FloatRegister, bt == T_FLOAT ? T_INT : T_LONG,
+                              length_in_bytes, $src$$FloatRegister, T_SHORT);
+        __ scvtfv(get_arrangement(this), $dst$$FloatRegister, $dst$$FloatRegister);
+      } else {
+        // 2S to 2I/2L, 4S to 4I
+        __ neon_vector_extend($dst$$FloatRegister, bt, length_in_bytes,
+                              $src$$FloatRegister, T_SHORT);
       }
     } else {
       assert(UseSVE > 0, "must be sve");
@@ -4206,7 +4387,7 @@ instruct vcvtItoX_narrow_neon(vReg dst, vReg src) %{
   effect(TEMP_DEF dst);
   format %{ "vcvtItoX_narrow_neon $dst, $src" %}
   ins_encode %{
-    // 4I to 4B/4S
+    // 2I to 2S, 4I to 4B/4S
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this, $src);
     __ neon_vector_narrow($dst$$FloatRegister, bt,
@@ -4269,28 +4450,29 @@ instruct vcvtItoX(vReg dst, vReg src) %{
 
 // VectorCastL2X
 
-instruct vcvtLtoI_neon(vReg dst, vReg src) %{
-  predicate(Matcher::vector_element_basic_type(n) == T_INT &&
+instruct vcvtLtoX_narrow_neon(vReg dst, vReg src) %{
+  predicate((Matcher::vector_element_basic_type(n) == T_INT ||
+             Matcher::vector_element_basic_type(n) == T_SHORT) &&
             VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1))));
   match(Set dst (VectorCastL2X src));
-  format %{ "vcvtLtoI_neon $dst, $src" %}
+  format %{ "vcvtLtoX_narrow_neon $dst, $src" %}
   ins_encode %{
-    // 2L to 2I
+    // 2L to 2S/2I
+    BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this, $src);
-    __ neon_vector_narrow($dst$$FloatRegister, T_INT,
+    __ neon_vector_narrow($dst$$FloatRegister, bt,
                           $src$$FloatRegister, T_LONG, length_in_bytes);
   %}
   ins_pipe(pipe_slow);
 %}
 
-instruct vcvtLtoI_sve(vReg dst, vReg src, vReg tmp) %{
-  predicate((Matcher::vector_element_basic_type(n) == T_INT &&
-             !VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1)))) ||
-            Matcher::vector_element_basic_type(n) == T_BYTE ||
-            Matcher::vector_element_basic_type(n) == T_SHORT);
+instruct vcvtLtoX_narrow_sve(vReg dst, vReg src, vReg tmp) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1))) &&
+            !is_floating_point_type(Matcher::vector_element_basic_type(n)) &&
+            type2aelembytes(Matcher::vector_element_basic_type(n)) <= 4);
   match(Set dst (VectorCastL2X src));
   effect(TEMP_DEF dst, TEMP tmp);
-  format %{ "vcvtLtoI_sve $dst, $src\t# KILL $tmp" %}
+  format %{ "vcvtLtoX_narrow_sve $dst, $src\t# KILL $tmp" %}
   ins_encode %{
     assert(UseSVE > 0, "must be sve");
     BasicType bt = Matcher::vector_element_basic_type(this);
@@ -4356,10 +4538,11 @@ instruct vcvtFtoX_narrow_neon(vReg dst, vReg src) %{
   effect(TEMP_DEF dst);
   format %{ "vcvtFtoX_narrow_neon $dst, $src" %}
   ins_encode %{
-    // 4F to 4B/4S
+    // 2F to 2S, 4F to 4B/4S
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this, $src);
-    __ fcvtzs($dst$$FloatRegister, __ T4S, $src$$FloatRegister);
+    __ fcvtzs($dst$$FloatRegister, length_in_bytes == 16 ? __ T4S : __ T2S,
+              $src$$FloatRegister);
     __ neon_vector_narrow($dst$$FloatRegister, bt,
                           $dst$$FloatRegister, T_INT, length_in_bytes);
   %}
@@ -4425,12 +4608,14 @@ instruct vcvtFtoX(vReg dst, vReg src) %{
 // VectorCastD2X
 
 instruct vcvtDtoI_neon(vReg dst, vReg src) %{
-  predicate(UseSVE == 0 && Matcher::vector_element_basic_type(n) == T_INT);
+  predicate(UseSVE == 0 &&
+            (Matcher::vector_element_basic_type(n) == T_INT ||
+             Matcher::vector_element_basic_type(n) == T_SHORT));
   match(Set dst (VectorCastD2X src));
   effect(TEMP_DEF dst);
-  format %{ "vcvtDtoI_neon $dst, $src\t# 2D to 2I" %}
+  format %{ "vcvtDtoI_neon $dst, $src\t# 2D to 2S/2I" %}
   ins_encode %{
-    // 2D to 2I
+    // 2D to 2S/2I
     __ ins($dst$$FloatRegister, __ D, $src$$FloatRegister, 0, 1);
     // We can't use fcvtzs(vector, integer) instruction here because we need
     // saturation arithmetic. See JDK-8276151.
@@ -4438,6 +4623,10 @@ instruct vcvtDtoI_neon(vReg dst, vReg src) %{
     __ fcvtzdw(rscratch2, $dst$$FloatRegister);
     __ fmovs($dst$$FloatRegister, rscratch1);
     __ mov($dst$$FloatRegister, __ S, 1, rscratch2);
+    if (Matcher::vector_element_basic_type(this) == T_SHORT) {
+      __ neon_vector_narrow($dst$$FloatRegister, T_SHORT,
+                            $dst$$FloatRegister, T_INT, 8);
+    }
   %}
   ins_pipe(pipe_slow);
 %}
@@ -4511,7 +4700,7 @@ instruct vcvtHFtoF(vReg dst, vReg src) %{
   ins_encode %{
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      // 4HF to 4F
+      // 2HF to 2F, 4HF to 4F
       __ fcvtl($dst$$FloatRegister, __ T4S, $src$$FloatRegister, __ T4H);
     } else {
       assert(UseSVE > 0, "must be sve");
@@ -4527,9 +4716,9 @@ instruct vcvtHFtoF(vReg dst, vReg src) %{
 instruct vcvtFtoHF_neon(vReg dst, vReg src) %{
   predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1))));
   match(Set dst (VectorCastF2HF src));
-  format %{ "vcvtFtoHF_neon $dst, $src\t# 4F to 4HF" %}
+  format %{ "vcvtFtoHF_neon $dst, $src\t# 2F/4F to 2HF/4HF" %}
   ins_encode %{
-    // 4F to 4HF
+    // 2F to 2HF, 4F to 4HF
     __ fcvtn($dst$$FloatRegister, __ T4H, $src$$FloatRegister, __ T4S);
   %}
   ins_pipe(pipe_slow);
@@ -4613,6 +4802,23 @@ instruct replicateD(vReg dst, vRegD src) %{
   ins_pipe(pipe_slow);
 %}
 
+// Replicate a half-precision float value held in a floating point register
+instruct replicateHF(vReg dst, vRegF src) %{
+  predicate(Matcher::vector_element_basic_type(n) == T_SHORT);
+  match(Set dst (Replicate src));
+  format %{ "replicateHF $dst, $src\t# replicate half-precision float" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ dup($dst$$FloatRegister, get_arrangement(this), $src$$FloatRegister);
+    } else { // length_in_bytes must be > 16 and SVE should be enabled
+      assert(UseSVE > 0, "must be sve");
+      __ sve_cpy($dst$$FloatRegister, __ H, ptrue, $src$$FloatRegister);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // replicate from imm
 
 instruct replicateI_imm_le128b(vReg dst, immI con) %{
@@ -4681,6 +4887,23 @@ instruct replicateL_imm8_gt128b(vReg dst, immL8_shift8 con) %{
   ins_pipe(pipe_slow);
 %}
 
+// Replicate a 16-bit half precision float value
+instruct replicateHF_imm(vReg dst, immH con) %{
+  match(Set dst (Replicate con));
+  format %{ "replicateHF_imm $dst, $con\t# replicate immediate half-precision float" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    int imm = (int)($con$$constant) & 0xffff;
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ mov($dst$$FloatRegister, get_arrangement(this), imm);
+    } else { // length_in_bytes must be > 16 and SVE should be enabled
+      assert(UseSVE > 0, "must be sve");
+      __ sve_dup($dst$$FloatRegister, __ H, imm);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // ------------------------------ Vector insert --------------------------------
 
 // BYTE, SHORT, INT
@@ -6197,14 +6420,12 @@ instruct vpopcountI(vReg dst, vReg src) %{
     } else {
       assert(bt == T_SHORT || bt == T_INT, "unsupported");
       if (UseSVE == 0) {
-        assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
-        __ cnt($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,
-               $src$$FloatRegister);
-        __ uaddlp($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,
-                  $dst$$FloatRegister);
+        assert(length_in_bytes <= 16, "unsupported");
+        bool isQ = length_in_bytes == 16;
+        __ cnt($dst$$FloatRegister, isQ ? __ T16B : __ T8B, $src$$FloatRegister);
+        __ uaddlp($dst$$FloatRegister, isQ ? __ T16B : __ T8B, $dst$$FloatRegister);
         if (bt == T_INT) {
-          __ uaddlp($dst$$FloatRegister, length_in_bytes == 16 ? __ T8H : __ T4H,
-                    $dst$$FloatRegister);
+          __ uaddlp($dst$$FloatRegister, isQ ? __ T8H : __ T4H, $dst$$FloatRegister);
         }
       } else {
         __ sve_cnt($dst$$FloatRegister, __ elemType_to_regVariant(bt),
@@ -6266,7 +6487,7 @@ instruct vblend_neon(vReg dst, vReg src1, vReg src2) %{
   format %{ "vblend_neon $dst, $src1, $src2" %}
   ins_encode %{
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
-    assert(length_in_bytes == 8 || length_in_bytes == 16, "must be");
+    assert(length_in_bytes <= 16, "must be");
     __ bsl($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,
            $src2$$FloatRegister, $src1$$FloatRegister);
   %}
@@ -6653,7 +6874,7 @@ instruct vcountTrailingZeros(vReg dst, vReg src) %{
     } else {
       assert(bt == T_SHORT || bt == T_INT || bt == T_LONG, "unsupported type");
       if (UseSVE == 0) {
-        assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
+        assert(length_in_bytes <= 16, "unsupported");
         __ neon_reverse_bits($dst$$FloatRegister, $src$$FloatRegister,
                              bt, /* isQ */ length_in_bytes == 16);
         if (bt != T_LONG) {
@@ -6712,7 +6933,7 @@ instruct vreverse(vReg dst, vReg src) %{
     } else {
       assert(bt == T_SHORT || bt == T_INT || bt == T_LONG, "unsupported type");
       if (UseSVE == 0) {
-        assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
+        assert(length_in_bytes <= 16, "unsupported");
         __ neon_reverse_bits($dst$$FloatRegister, $src$$FloatRegister,
                              bt, /* isQ */ length_in_bytes == 16);
       } else {
@@ -6748,7 +6969,7 @@ instruct vreverseBytes(vReg dst, vReg src) %{
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
+      assert(length_in_bytes <= 16, "unsupported");
       if (bt == T_BYTE) {
         if ($dst$$FloatRegister != $src$$FloatRegister) {
           __ orr($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,

src/hotspot/cpu/aarch64/aarch64_vector_ad.m4

@@ -1,6 +1,6 @@
 //
 // Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
-// Copyright (c) 2020, 2024, Arm Limited. All rights reserved.
+// Copyright (c) 2020, 2025, Arm Limited. All rights reserved.
 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 //
 // This code is free software; you can redistribute it and/or modify it
@@ -121,7 +121,7 @@ source %{
       // These operations are not profitable to be vectorized on NEON, because no direct
       // NEON instructions support them. But the match rule support for them is profitable for
       // Vector API intrinsics.
-      if ((opcode == Op_VectorCastD2X && bt == T_INT) ||
+      if ((opcode == Op_VectorCastD2X && (bt == T_INT || bt == T_SHORT)) ||
           (opcode == Op_VectorCastL2X && bt == T_FLOAT) ||
           (opcode == Op_CountLeadingZerosV && bt == T_LONG) ||
           (opcode == Op_CountTrailingZerosV && bt == T_LONG) ||
@@ -179,6 +179,18 @@ source %{
           return false;
         }
         break;
+      case Op_AddReductionVI:
+      case Op_AndReductionV:
+      case Op_OrReductionV:
+      case Op_XorReductionV:
+      case Op_MinReductionV:
+      case Op_MaxReductionV:
+        // Reductions with less than 8 bytes vector length are
+        // not supported.
+        if (length_in_bytes < 8) {
+          return false;
+        }
+        break;
       case Op_MulReductionVD:
       case Op_MulReductionVF:
       case Op_MulReductionVI:
@@ -215,6 +227,26 @@ source %{
           return false;
         }
         break;
+      case Op_AddVHF:
+      case Op_SubVHF:
+      case Op_MulVHF:
+      case Op_DivVHF:
+      case Op_MinVHF:
+      case Op_MaxVHF:
+      case Op_SqrtVHF:
+        // FEAT_FP16 is enabled if both "fphp" and "asimdhp" features are supported.
+        // Only the Neon instructions need this check. SVE supports half-precision floats
+        // by default.
+        if (UseSVE == 0 && !is_feat_fp16_supported()) {
+          return false;
+        }
+        break;
+      case Op_FmaVHF:
+        // UseFMA flag needs to be checked along with FEAT_FP16
+        if (!UseFMA || (UseSVE == 0 && !is_feat_fp16_supported())) {
+          return false;
+        }
+        break;
       default:
         break;
     }
@@ -260,6 +292,19 @@ source %{
       case Op_StoreVectorScatter:
         opcode = Op_StoreVectorScatterMasked;
         break;
+      // Currently, the masked versions of the following 8 Float16 operations are disabled.
+      // When the support for Float16 vector classes is added in VectorAPI and the masked
+      // Float16 IR can be generated, these masked operations will be enabled and relevant
+      // backend support added.
+      case Op_AddVHF:
+      case Op_SubVHF:
+      case Op_MulVHF:
+      case Op_DivVHF:
+      case Op_MaxVHF:
+      case Op_MinVHF:
+      case Op_SqrtVHF:
+      case Op_FmaVHF:
+        return false;
       default:
         break;
     }
@@ -508,12 +553,13 @@ dnl
 // ------------------------------ Vector add -----------------------------------
 
 // vector add
-BINARY_OP(vaddB, AddVB, addv, sve_add,  B)
-BINARY_OP(vaddS, AddVS, addv, sve_add,  H)
-BINARY_OP(vaddI, AddVI, addv, sve_add,  S)
-BINARY_OP(vaddL, AddVL, addv, sve_add,  D)
-BINARY_OP(vaddF, AddVF, fadd, sve_fadd, S)
-BINARY_OP(vaddD, AddVD, fadd, sve_fadd, D)
+BINARY_OP(vaddB,  AddVB,  addv, sve_add,  B)
+BINARY_OP(vaddS,  AddVS,  addv, sve_add,  H)
+BINARY_OP(vaddI,  AddVI,  addv, sve_add,  S)
+BINARY_OP(vaddL,  AddVL,  addv, sve_add,  D)
+BINARY_OP(vaddHF, AddVHF, fadd, sve_fadd, H)
+BINARY_OP(vaddF,  AddVF,  fadd, sve_fadd, S)
+BINARY_OP(vaddD,  AddVD,  fadd, sve_fadd, D)
 
 // vector add - predicated
 BINARY_OP_PREDICATE(vaddB, AddVB, sve_add,  B)
@@ -532,12 +578,13 @@ VADD_IMM(L, immLAddSubV, D)
 // ------------------------------ Vector sub -----------------------------------
 
 // vector sub
-BINARY_OP(vsubB, SubVB, subv, sve_sub,  B)
-BINARY_OP(vsubS, SubVS, subv, sve_sub,  H)
-BINARY_OP(vsubI, SubVI, subv, sve_sub,  S)
-BINARY_OP(vsubL, SubVL, subv, sve_sub,  D)
-BINARY_OP(vsubF, SubVF, fsub, sve_fsub, S)
-BINARY_OP(vsubD, SubVD, fsub, sve_fsub, D)
+BINARY_OP(vsubB,  SubVB,  subv, sve_sub,  B)
+BINARY_OP(vsubS,  SubVS,  subv, sve_sub,  H)
+BINARY_OP(vsubI,  SubVI,  subv, sve_sub,  S)
+BINARY_OP(vsubL,  SubVL,  subv, sve_sub,  D)
+BINARY_OP(vsubHF, SubVHF, fsub, sve_fsub, H)
+BINARY_OP(vsubF,  SubVF,  fsub, sve_fsub, S)
+BINARY_OP(vsubD,  SubVD,  fsub, sve_fsub, D)
 
 // vector sub - predicated
 BINARY_OP_PREDICATE(vsubB, SubVB, sve_sub,  B)
@@ -612,8 +659,9 @@ instruct vmulL_sve(vReg dst_src1, vReg src2) %{
 %}
 
 // vector mul - floating-point
-BINARY_OP(vmulF, MulVF, fmul, sve_fmul, S)
-BINARY_OP(vmulD, MulVD, fmul, sve_fmul, D)
+BINARY_OP(vmulHF, MulVHF, fmul, sve_fmul, H)
+BINARY_OP(vmulF,  MulVF,  fmul, sve_fmul, S)
+BINARY_OP(vmulD,  MulVD,  fmul, sve_fmul, D)
 
 // vector mul - predicated
 BINARY_OP_PREDICATE(vmulB, MulVB, sve_mul,  B)
@@ -626,8 +674,9 @@ BINARY_OP_PREDICATE(vmulD, MulVD, sve_fmul, D)
 // ------------------------------ Vector float div -----------------------------
 
 // vector float div
-BINARY_OP_NEON_SVE_PAIRWISE(vdivF, DivVF, fdiv, sve_fdiv, S)
-BINARY_OP_NEON_SVE_PAIRWISE(vdivD, DivVD, fdiv, sve_fdiv, D)
+BINARY_OP_NEON_SVE_PAIRWISE(vdivHF, DivVHF, fdiv, sve_fdiv, H)
+BINARY_OP_NEON_SVE_PAIRWISE(vdivF,  DivVF,  fdiv, sve_fdiv, S)
+BINARY_OP_NEON_SVE_PAIRWISE(vdivD,  DivVD,  fdiv, sve_fdiv, D)
 
 // vector float div - predicated
 BINARY_OP_PREDICATE(vdivF, DivVF, sve_fdiv, S)
@@ -1016,8 +1065,9 @@ UNARY_OP_PREDICATE_WITH_SIZE(vnegD, NegVD, sve_fneg, D)
 // ------------------------------ Vector sqrt ----------------------------------
 
 // vector sqrt
-UNARY_OP(vsqrtF, SqrtVF, fsqrt, sve_fsqrt, S)
-UNARY_OP(vsqrtD, SqrtVD, fsqrt, sve_fsqrt, D)
+UNARY_OP(vsqrtHF, SqrtVHF, fsqrt, sve_fsqrt, H)
+UNARY_OP(vsqrtF,  SqrtVF,  fsqrt, sve_fsqrt, S)
+UNARY_OP(vsqrtD,  SqrtVD,  fsqrt, sve_fsqrt, D)
 
 // vector sqrt - predicated
 UNARY_OP_PREDICATE_WITH_SIZE(vsqrtF, SqrtVF, sve_fsqrt, S)
@@ -1074,6 +1124,20 @@ instruct v$1_neon(vReg dst, vReg src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}')dnl
 dnl
+dnl VMINMAX_HF_NEON($1,   $2,      $3     )
+dnl VMINMAX_HF_NEON(type, op_name, insn_fp)
+define(`VMINMAX_HF_NEON', `
+instruct v$1_HF_neon(vReg dst, vReg src1, vReg src2) %{
+  predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst ($2 src1 src2));
+  format %{ "v$1_HF_neon $dst, $src1, $src2\t# Half float" %}
+  ins_encode %{
+    __ $3($dst$$FloatRegister, get_arrangement(this),
+            $src1$$FloatRegister, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}')dnl
+dnl
 dnl VMINMAX_SVE($1,   $2,      $3,      $4           )
 dnl VMINMAX_SVE(type, op_name, insn_fp, insn_integral)
 define(`VMINMAX_SVE', `
@@ -1097,6 +1161,21 @@ instruct v$1_sve(vReg dst_src1, vReg src2) %{
   ins_pipe(pipe_slow);
 %}')dnl
 dnl
+dnl VMINMAX_HF_SVE($1,   $2,      $3     )
+dnl VMINMAX_HF_SVE(type, op_name, insn_fp)
+define(`VMINMAX_HF_SVE', `
+instruct v$1_HF_sve(vReg dst_src1, vReg src2) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n)));
+  match(Set dst_src1 ($2 dst_src1 src2));
+  format %{ "v$1_HF_sve $dst_src1, $dst_src1, $src2\t# Half float" %}
+  ins_encode %{
+    assert(UseSVE > 0, "must be sve");
+    __ $3($dst_src1$$FloatRegister, __ H,
+                ptrue, $src2$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}')dnl
+dnl
 dnl VMINMAX_PREDICATE($1,   $2,      $3,      $4           )
 dnl VMINMAX_PREDICATE(type, op_name, insn_fp, insn_integral)
 define(`VMINMAX_PREDICATE', `
@@ -1175,9 +1254,11 @@ dnl
 VMINMAX_L_NEON(min, MinV)
 VMINMAX_L_SVE(min, MinV, sve_smin)
 
-// vector min - B/S/I/F/D
+// vector min - B/S/I/HF/F/D
 VMINMAX_NEON(min, MinV, fmin, minv)
 VMINMAX_SVE(min, MinV, sve_fmin, sve_smin)
+VMINMAX_HF_NEON(min, MinVHF, fmin)
+VMINMAX_HF_SVE(min, MinVHF, sve_fmin)
 
 // vector min - predicated
 VMINMAX_PREDICATE(min, MinV, sve_fmin, sve_smin)
@@ -1199,9 +1280,11 @@ VUMINMAX_PREDICATE(umin, UMinV, sve_umin)
 VMINMAX_L_NEON(max, MaxV)
 VMINMAX_L_SVE(max, MaxV, sve_smax)
 
-// vector max - B/S/I/F/D
+// vector max - B/S/I/HF/F/D
 VMINMAX_NEON(max, MaxV, fmax, maxv)
 VMINMAX_SVE(max, MaxV, sve_fmax, sve_smax)
+VMINMAX_HF_NEON(max, MaxVHF, fmax)
+VMINMAX_HF_SVE(max, MaxVHF, sve_fmax)
 
 // vector max - predicated
 VMINMAX_PREDICATE(max, MaxV, sve_fmax, sve_smax)
@@ -1273,8 +1356,9 @@ instruct vmla_masked(vReg dst_src1, vReg src2, vReg src3, pRegGov pg) %{
 // dst_src1 = src2 * src3 + dst_src1
 
 instruct vfmla(vReg dst_src1, vReg src2, vReg src3) %{
-  match(Set dst_src1 (FmaVF dst_src1 (Binary src2 src3)));
-  match(Set dst_src1 (FmaVD dst_src1 (Binary src2 src3)));
+  match(Set dst_src1 (FmaVHF dst_src1 (Binary src2 src3)));
+  match(Set dst_src1 (FmaVF  dst_src1 (Binary src2 src3)));
+  match(Set dst_src1 (FmaVD  dst_src1 (Binary src2 src3)));
   format %{ "vfmla $dst_src1, $src2, $src3" %}
   ins_encode %{
     assert(UseFMA, "Needs FMA instructions support.");
@@ -2430,31 +2514,31 @@ instruct reinterpret_resize_gt128b(vReg dst, vReg src, pReg ptmp, rFlagsReg cr)
 %}
 
 // ---------------------------- Vector zero extend --------------------------------
-dnl VECTOR_ZERO_EXTEND($1,      $2,     $3,      $4,       $5        $6,        $7,         )
-dnl VECTOR_ZERO_EXTEND(op_name, dst_bt, src_bt,  dst_size, src_size, assertion, neon_comment)
+dnl VECTOR_ZERO_EXTEND($1,      $2,     $3,       $4,        $5,         )
+dnl VECTOR_ZERO_EXTEND(op_name, src_bt, src_size, assertion, neon_comment)
 define(`VECTOR_ZERO_EXTEND', `
 instruct vzeroExt$1toX(vReg dst, vReg src) %{
   match(Set dst (VectorUCast`$1'2X src));
   format %{ "vzeroExt$1toX $dst, $src" %}
   ins_encode %{
     BasicType bt = Matcher::vector_element_basic_type(this);
-    assert($6, "must be");
+    assert($4, "must be");
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      // $7
-      __ neon_vector_extend($dst$$FloatRegister, $2, length_in_bytes,
-                            $src$$FloatRegister, $3, /* is_unsigned */ true);
+      // $5
+      __ neon_vector_extend($dst$$FloatRegister, bt, length_in_bytes,
+                            $src$$FloatRegister, $2, /* is_unsigned */ true);
     } else {
       assert(UseSVE > 0, "must be sve");
-      __ sve_vector_extend($dst$$FloatRegister, __ $4,
-                           $src$$FloatRegister, __ $5, /* is_unsigned */ true);
+      __ sve_vector_extend($dst$$FloatRegister, __ elemType_to_regVariant(bt),
+                           $src$$FloatRegister, __ $3, /* is_unsigned */ true);
     }
   %}
   ins_pipe(pipe_slow);
 %}')dnl
-VECTOR_ZERO_EXTEND(B, bt,     T_BYTE,  elemType_to_regVariant(bt), B, bt == T_SHORT || bt == T_INT || bt == T_LONG, `4B to 4S/4I, 8B to 8S')
-VECTOR_ZERO_EXTEND(S, T_INT,  T_SHORT, elemType_to_regVariant(bt), H, bt == T_INT || bt == T_LONG,                  `4S to 4I')
-VECTOR_ZERO_EXTEND(I, T_LONG, T_INT,   D,                          S, bt == T_LONG,                                 `2I to 2L')
+VECTOR_ZERO_EXTEND(B, T_BYTE,  B, bt == T_SHORT || bt == T_INT || bt == T_LONG, `4B to 4S/4I, 8B to 8S')
+VECTOR_ZERO_EXTEND(S, T_SHORT, H, bt == T_INT || bt == T_LONG,                  `2S to 2I/2L, 4S to 4I')
+VECTOR_ZERO_EXTEND(I, T_INT,   S, bt == T_LONG,                                 `2I to 2L')
 
 // ------------------------------ Vector cast ----------------------------------
 
@@ -2523,11 +2607,15 @@ instruct vcvtStoX_extend(vReg dst, vReg src) %{
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      // 4S to 4I/4F
-      __ neon_vector_extend($dst$$FloatRegister, T_INT, length_in_bytes,
-                            $src$$FloatRegister, T_SHORT);
-      if (bt == T_FLOAT) {
-        __ scvtfv(__ T4S, $dst$$FloatRegister, $dst$$FloatRegister);
+      if (is_floating_point_type(bt)) {
+        // 2S to 2F/2D, 4S to 4F
+        __ neon_vector_extend($dst$$FloatRegister, bt == T_FLOAT ? T_INT : T_LONG,
+                              length_in_bytes, $src$$FloatRegister, T_SHORT);
+        __ scvtfv(get_arrangement(this), $dst$$FloatRegister, $dst$$FloatRegister);
+      } else {
+        // 2S to 2I/2L, 4S to 4I
+        __ neon_vector_extend($dst$$FloatRegister, bt, length_in_bytes,
+                              $src$$FloatRegister, T_SHORT);
       }
     } else {
       assert(UseSVE > 0, "must be sve");
@@ -2551,7 +2639,7 @@ instruct vcvtItoX_narrow_neon(vReg dst, vReg src) %{
   effect(TEMP_DEF dst);
   format %{ "vcvtItoX_narrow_neon $dst, $src" %}
   ins_encode %{
-    // 4I to 4B/4S
+    // 2I to 2S, 4I to 4B/4S
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this, $src);
     __ neon_vector_narrow($dst$$FloatRegister, bt,
@@ -2614,28 +2702,29 @@ instruct vcvtItoX(vReg dst, vReg src) %{
 
 // VectorCastL2X
 
-instruct vcvtLtoI_neon(vReg dst, vReg src) %{
-  predicate(Matcher::vector_element_basic_type(n) == T_INT &&
+instruct vcvtLtoX_narrow_neon(vReg dst, vReg src) %{
+  predicate((Matcher::vector_element_basic_type(n) == T_INT ||
+             Matcher::vector_element_basic_type(n) == T_SHORT) &&
             VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1))));
   match(Set dst (VectorCastL2X src));
-  format %{ "vcvtLtoI_neon $dst, $src" %}
+  format %{ "vcvtLtoX_narrow_neon $dst, $src" %}
   ins_encode %{
-    // 2L to 2I
+    // 2L to 2S/2I
+    BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this, $src);
-    __ neon_vector_narrow($dst$$FloatRegister, T_INT,
+    __ neon_vector_narrow($dst$$FloatRegister, bt,
                           $src$$FloatRegister, T_LONG, length_in_bytes);
   %}
   ins_pipe(pipe_slow);
 %}
 
-instruct vcvtLtoI_sve(vReg dst, vReg src, vReg tmp) %{
-  predicate((Matcher::vector_element_basic_type(n) == T_INT &&
-             !VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1)))) ||
-            Matcher::vector_element_basic_type(n) == T_BYTE ||
-            Matcher::vector_element_basic_type(n) == T_SHORT);
+instruct vcvtLtoX_narrow_sve(vReg dst, vReg src, vReg tmp) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1))) &&
+            !is_floating_point_type(Matcher::vector_element_basic_type(n)) &&
+            type2aelembytes(Matcher::vector_element_basic_type(n)) <= 4);
   match(Set dst (VectorCastL2X src));
   effect(TEMP_DEF dst, TEMP tmp);
-  format %{ "vcvtLtoI_sve $dst, $src\t# KILL $tmp" %}
+  format %{ "vcvtLtoX_narrow_sve $dst, $src\t# KILL $tmp" %}
   ins_encode %{
     assert(UseSVE > 0, "must be sve");
     BasicType bt = Matcher::vector_element_basic_type(this);
@@ -2701,10 +2790,11 @@ instruct vcvtFtoX_narrow_neon(vReg dst, vReg src) %{
   effect(TEMP_DEF dst);
   format %{ "vcvtFtoX_narrow_neon $dst, $src" %}
   ins_encode %{
-    // 4F to 4B/4S
+    // 2F to 2S, 4F to 4B/4S
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this, $src);
-    __ fcvtzs($dst$$FloatRegister, __ T4S, $src$$FloatRegister);
+    __ fcvtzs($dst$$FloatRegister, length_in_bytes == 16 ? __ T4S : __ T2S,
+              $src$$FloatRegister);
     __ neon_vector_narrow($dst$$FloatRegister, bt,
                           $dst$$FloatRegister, T_INT, length_in_bytes);
   %}
@@ -2770,12 +2860,14 @@ instruct vcvtFtoX(vReg dst, vReg src) %{
 // VectorCastD2X
 
 instruct vcvtDtoI_neon(vReg dst, vReg src) %{
-  predicate(UseSVE == 0 && Matcher::vector_element_basic_type(n) == T_INT);
+  predicate(UseSVE == 0 &&
+            (Matcher::vector_element_basic_type(n) == T_INT ||
+             Matcher::vector_element_basic_type(n) == T_SHORT));
   match(Set dst (VectorCastD2X src));
   effect(TEMP_DEF dst);
-  format %{ "vcvtDtoI_neon $dst, $src\t# 2D to 2I" %}
+  format %{ "vcvtDtoI_neon $dst, $src\t# 2D to 2S/2I" %}
   ins_encode %{
-    // 2D to 2I
+    // 2D to 2S/2I
     __ ins($dst$$FloatRegister, __ D, $src$$FloatRegister, 0, 1);
     // We can't use fcvtzs(vector, integer) instruction here because we need
     // saturation arithmetic. See JDK-8276151.
@@ -2783,6 +2875,10 @@ instruct vcvtDtoI_neon(vReg dst, vReg src) %{
     __ fcvtzdw(rscratch2, $dst$$FloatRegister);
     __ fmovs($dst$$FloatRegister, rscratch1);
     __ mov($dst$$FloatRegister, __ S, 1, rscratch2);
+    if (Matcher::vector_element_basic_type(this) == T_SHORT) {
+      __ neon_vector_narrow($dst$$FloatRegister, T_SHORT,
+                            $dst$$FloatRegister, T_INT, 8);
+    }
   %}
   ins_pipe(pipe_slow);
 %}
@@ -2856,7 +2952,7 @@ instruct vcvtHFtoF(vReg dst, vReg src) %{
   ins_encode %{
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      // 4HF to 4F
+      // 2HF to 2F, 4HF to 4F
       __ fcvtl($dst$$FloatRegister, __ T4S, $src$$FloatRegister, __ T4H);
     } else {
       assert(UseSVE > 0, "must be sve");
@@ -2872,9 +2968,9 @@ instruct vcvtHFtoF(vReg dst, vReg src) %{
 instruct vcvtFtoHF_neon(vReg dst, vReg src) %{
   predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(1))));
   match(Set dst (VectorCastF2HF src));
-  format %{ "vcvtFtoHF_neon $dst, $src\t# 4F to 4HF" %}
+  format %{ "vcvtFtoHF_neon $dst, $src\t# 2F/4F to 2HF/4HF" %}
   ins_encode %{
-    // 4F to 4HF
+    // 2F to 2HF, 4F to 4HF
     __ fcvtn($dst$$FloatRegister, __ T4H, $src$$FloatRegister, __ T4S);
   %}
   ins_pipe(pipe_slow);
@@ -2938,6 +3034,23 @@ REPLICATE_INT(L, iRegL)
 REPLICATE_FP(F, S, T_FLOAT )
 REPLICATE_FP(D, D, T_DOUBLE)
 
+// Replicate a half-precision float value held in a floating point register
+instruct replicateHF(vReg dst, vRegF src) %{
+  predicate(Matcher::vector_element_basic_type(n) == T_SHORT);
+  match(Set dst (Replicate src));
+  format %{ "replicateHF $dst, $src\t# replicate half-precision float" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ dup($dst$$FloatRegister, get_arrangement(this), $src$$FloatRegister);
+    } else { // length_in_bytes must be > 16 and SVE should be enabled
+      assert(UseSVE > 0, "must be sve");
+      __ sve_cpy($dst$$FloatRegister, __ H, ptrue, $src$$FloatRegister);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // replicate from imm
 
 instruct replicateI_imm_le128b(vReg dst, immI con) %{
@@ -3006,6 +3119,23 @@ instruct replicateL_imm8_gt128b(vReg dst, immL8_shift8 con) %{
   ins_pipe(pipe_slow);
 %}
 
+// Replicate a 16-bit half precision float value
+instruct replicateHF_imm(vReg dst, immH con) %{
+  match(Set dst (Replicate con));
+  format %{ "replicateHF_imm $dst, $con\t# replicate immediate half-precision float" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this);
+    int imm = (int)($con$$constant) & 0xffff;
+    if (VM_Version::use_neon_for_vector(length_in_bytes)) {
+      __ mov($dst$$FloatRegister, get_arrangement(this), imm);
+    } else { // length_in_bytes must be > 16 and SVE should be enabled
+      assert(UseSVE > 0, "must be sve");
+      __ sve_dup($dst$$FloatRegister, __ H, imm);
+    }
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // ------------------------------ Vector insert --------------------------------
 
 // BYTE, SHORT, INT
@@ -4311,14 +4441,12 @@ instruct vpopcountI(vReg dst, vReg src) %{
     } else {
       assert(bt == T_SHORT || bt == T_INT, "unsupported");
       if (UseSVE == 0) {
-        assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
-        __ cnt($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,
-               $src$$FloatRegister);
-        __ uaddlp($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,
-                  $dst$$FloatRegister);
+        assert(length_in_bytes <= 16, "unsupported");
+        bool isQ = length_in_bytes == 16;
+        __ cnt($dst$$FloatRegister, isQ ? __ T16B : __ T8B, $src$$FloatRegister);
+        __ uaddlp($dst$$FloatRegister, isQ ? __ T16B : __ T8B, $dst$$FloatRegister);
         if (bt == T_INT) {
-          __ uaddlp($dst$$FloatRegister, length_in_bytes == 16 ? __ T8H : __ T4H,
-                    $dst$$FloatRegister);
+          __ uaddlp($dst$$FloatRegister, isQ ? __ T8H : __ T4H, $dst$$FloatRegister);
         }
       } else {
         __ sve_cnt($dst$$FloatRegister, __ elemType_to_regVariant(bt),
@@ -4369,7 +4497,7 @@ instruct vblend_neon(vReg dst, vReg src1, vReg src2) %{
   format %{ "vblend_neon $dst, $src1, $src2" %}
   ins_encode %{
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
-    assert(length_in_bytes == 8 || length_in_bytes == 16, "must be");
+    assert(length_in_bytes <= 16, "must be");
     __ bsl($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,
            $src2$$FloatRegister, $src1$$FloatRegister);
   %}
@@ -4745,7 +4873,7 @@ instruct vcountTrailingZeros(vReg dst, vReg src) %{
     } else {
       assert(bt == T_SHORT || bt == T_INT || bt == T_LONG, "unsupported type");
       if (UseSVE == 0) {
-        assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
+        assert(length_in_bytes <= 16, "unsupported");
         __ neon_reverse_bits($dst$$FloatRegister, $src$$FloatRegister,
                              bt, /* isQ */ length_in_bytes == 16);
         if (bt != T_LONG) {
@@ -4804,7 +4932,7 @@ instruct vreverse(vReg dst, vReg src) %{
     } else {
       assert(bt == T_SHORT || bt == T_INT || bt == T_LONG, "unsupported type");
       if (UseSVE == 0) {
-        assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
+        assert(length_in_bytes <= 16, "unsupported");
         __ neon_reverse_bits($dst$$FloatRegister, $src$$FloatRegister,
                              bt, /* isQ */ length_in_bytes == 16);
       } else {
@@ -4829,7 +4957,7 @@ instruct vreverseBytes(vReg dst, vReg src) %{
     BasicType bt = Matcher::vector_element_basic_type(this);
     uint length_in_bytes = Matcher::vector_length_in_bytes(this);
     if (VM_Version::use_neon_for_vector(length_in_bytes)) {
-      assert(length_in_bytes == 8 || length_in_bytes == 16, "unsupported");
+      assert(length_in_bytes <= 16, "unsupported");
       if (bt == T_BYTE) {
         if ($dst$$FloatRegister != $src$$FloatRegister) {
           __ orr($dst$$FloatRegister, length_in_bytes == 16 ? __ T16B : __ T8B,

src/hotspot/cpu/aarch64/assembler_aarch64.cpp

@@ -240,6 +240,19 @@ void Assembler::add_sub_immediate(Instruction_aarch64 &current_insn,
   srf(Rn, 5);
 }
 
+// This method is used to generate Advanced SIMD data processing instructions
+void Assembler::adv_simd_three_same(Instruction_aarch64 &current_insn, FloatRegister Vd,
+                                    SIMD_Arrangement T, FloatRegister Vn, FloatRegister Vm,
+                                    int op1, int op2, int op3) {
+  assert(T == T4H || T == T8H || T == T2S || T == T4S || T == T2D, "invalid arrangement");
+  int op22 = (T == T2S || T == T4S) ? 0b0 : 0b1;
+  int op21 = (T == T4H || T == T8H) ? 0b0 : 0b1;
+  int op14 = (T == T4H || T == T8H) ? 0b00 : 0b11;
+  f(0, 31), f((int)T & 1, 30), f(op1, 29), f(0b01110, 28, 24), f(op2, 23);
+  f(op22, 22); f(op21, 21), rf(Vm, 16), f(op14, 15, 14), f(op3, 13, 10),
+  rf(Vn, 5), rf(Vd, 0);
+}
+
 #undef f
 #undef sf
 #undef rf

src/hotspot/cpu/aarch64/assembler_aarch64.hpp

@@ -1136,6 +1136,10 @@ public:
     system(0b00, 0b011, 0b00011, SY, 0b110);
   }
 
+  void sb() {
+    system(0b00, 0b011, 0b00011, 0b0000, 0b111);
+  }
+
   void sys(int op1, int CRn, int CRm, int op2,
            Register rt = as_Register(0b11111)) {
     system(0b01, op1, CRn, CRm, op2, rt);
@@ -2743,26 +2747,26 @@ template<typename R, typename... Rx>
 
 #undef INSN
 
-// Advanced SIMD three same
-#define INSN(NAME, op1, op2, op3)                                                       \
-  void NAME(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn, FloatRegister Vm) { \
-    starti;                                                                             \
-    assert(T == T2S || T == T4S || T == T2D, "invalid arrangement");                    \
-    f(0, 31), f((int)T & 1, 30), f(op1, 29), f(0b01110, 28, 24), f(op2, 23);            \
-    f(T==T2D ? 1:0, 22); f(1, 21), rf(Vm, 16), f(op3, 15, 10), rf(Vn, 5), rf(Vd, 0);    \
+  // Advanced SIMD three same
+  void adv_simd_three_same(Instruction_aarch64 &current_insn, FloatRegister Vd,
+                           SIMD_Arrangement T, FloatRegister Vn, FloatRegister Vm,
+                           int op1, int op2, int op3);
+#define INSN(NAME, op1, op2, op3)                                                             \
+  void NAME(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn, FloatRegister Vm) {       \
+    starti;                                                                                   \
+    adv_simd_three_same(current_insn, Vd, T, Vn, Vm, op1, op2, op3);                          \
   }
-
-  INSN(fabd, 1, 1, 0b110101);
-  INSN(fadd, 0, 0, 0b110101);
-  INSN(fdiv, 1, 0, 0b111111);
-  INSN(faddp, 1, 0, 0b110101);
-  INSN(fmul, 1, 0, 0b110111);
-  INSN(fsub, 0, 1, 0b110101);
-  INSN(fmla, 0, 0, 0b110011);
-  INSN(fmls, 0, 1, 0b110011);
-  INSN(fmax, 0, 0, 0b111101);
-  INSN(fmin, 0, 1, 0b111101);
-  INSN(facgt, 1, 1, 0b111011);
+  INSN(fabd,  1, 1, 0b0101);
+  INSN(fadd,  0, 0, 0b0101);
+  INSN(fdiv,  1, 0, 0b1111);
+  INSN(faddp, 1, 0, 0b0101);
+  INSN(fmul,  1, 0, 0b0111);
+  INSN(fsub,  0, 1, 0b0101);
+  INSN(fmla,  0, 0, 0b0011);
+  INSN(fmls,  0, 1, 0b0011);
+  INSN(fmax,  0, 0, 0b1101);
+  INSN(fmin,  0, 1, 0b1101);
+  INSN(facgt, 1, 1, 0b1011);
 
 #undef INSN
 
@@ -3262,18 +3266,24 @@ public:
   // parameter "tmask" is a 2-bit mask used to indicate which bits in the size
   // field are determined by the SIMD_Arrangement. The bit of "tmask" should be
   // set to 1 if corresponding bit marked as "x" in the ArmARM.
-#define INSN(NAME, U, size, tmask, opcode)                                          \
-  void NAME(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn) {               \
-       starti;                                                                      \
-       assert((ASSERTION), MSG);                                                    \
-       f(0, 31), f((int)T & 1, 30), f(U, 29), f(0b01110, 28, 24);                   \
-       f(size | ((int)(T >> 1) & tmask), 23, 22), f(0b10000, 21, 17);               \
-       f(opcode, 16, 12), f(0b10, 11, 10), rf(Vn, 5), rf(Vd, 0);                    \
+#define INSN(NAME, U, size, tmask, opcode)                                      \
+  void NAME(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn) {           \
+    starti;                                                                     \
+    assert((ASSERTION), MSG);                                                   \
+    int op22 = (int)(T >> 1) & tmask;                                           \
+    int op19 = 0b00;                                                            \
+    if (tmask == 0b01 && (T == T4H || T == T8H)) {                              \
+      op22 = 0b1;                                                               \
+      op19 = 0b11;                                                              \
+    }                                                                           \
+    f(0, 31), f((int)T & 1, 30), f(U, 29), f(0b01110, 28, 24);                  \
+    f(size | op22, 23, 22), f(1, 21), f(op19, 20, 19), f(0b00, 18, 17);         \
+    f(opcode, 16, 12), f(0b10, 11, 10), rf(Vn, 5), rf(Vd, 0);                   \
  }
 
 #define MSG "invalid arrangement"
 
-#define ASSERTION (T == T2S || T == T4S || T == T2D)
+#define ASSERTION (T == T4H || T == T8H || T == T2S || T == T4S || T == T2D)
   INSN(fsqrt,  1, 0b10, 0b01, 0b11111);
   INSN(fabs,   0, 0b10, 0b01, 0b01111);
   INSN(fneg,   1, 0b10, 0b01, 0b01111);
@@ -3400,7 +3410,7 @@ public:
 #define INSN(NAME, opcode)                                                             \
   void NAME(FloatRegister Zd, SIMD_RegVariant T, FloatRegister Zn, FloatRegister Zm) { \
     starti;                                                                            \
-    assert(T == S || T == D, "invalid register variant");                              \
+    assert(T == H || T == S || T == D, "invalid register variant");                    \
     f(0b01100101, 31, 24), f(T, 23, 22), f(0, 21),                                     \
     rf(Zm, 16), f(0, 15, 13), f(opcode, 12, 10), rf(Zn, 5), rf(Zd, 0);                 \
   }
@@ -3485,7 +3495,7 @@ public:
 // SVE floating-point arithmetic - predicate
 #define INSN(NAME, op1, op2)                                                                          \
   void NAME(FloatRegister Zd_or_Zdn_or_Vd, SIMD_RegVariant T, PRegister Pg, FloatRegister Zn_or_Zm) { \
-    assert(T == S || T == D, "invalid register variant");                                             \
+    assert(T == H || T == S || T == D, "invalid register variant");                                   \
     sve_predicate_reg_insn(op1, op2, Zd_or_Zdn_or_Vd, T, Pg, Zn_or_Zm);                               \
   }
 

src/hotspot/cpu/aarch64/c1_CodeStubs_aarch64.cpp

@@ -56,7 +56,7 @@ void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
   __ mov_metadata(rscratch1, m);
   ce->store_parameter(rscratch1, 1);
   ce->store_parameter(_bci, 0);
-  __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::counter_overflow_id)));
+  __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_counter_overflow_id)));
   ce->add_call_info_here(_info);
   ce->verify_oop_map(_info);
   __ b(_continuation);
@@ -65,7 +65,7 @@ void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
   __ bind(_entry);
   if (_info->deoptimize_on_exception()) {
-    address a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
+    address a = Runtime1::entry_for(StubId::c1_predicate_failed_trap_id);
     __ far_call(RuntimeAddress(a));
     ce->add_call_info_here(_info);
     ce->verify_oop_map(_info);
@@ -78,13 +78,13 @@ void RangeCheckStub::emit_code(LIR_Assembler* ce) {
   } else {
     __ mov(rscratch1, _index->as_jint());
   }
-  C1StubId stub_id;
+  StubId stub_id;
   if (_throw_index_out_of_bounds_exception) {
-    stub_id = C1StubId::throw_index_exception_id;
+    stub_id = StubId::c1_throw_index_exception_id;
   } else {
     assert(_array != LIR_Opr::nullOpr(), "sanity");
     __ mov(rscratch2, _array->as_pointer_register());
-    stub_id = C1StubId::throw_range_check_failed_id;
+    stub_id = StubId::c1_throw_range_check_failed_id;
   }
   __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
   __ blr(lr);
@@ -99,7 +99,7 @@ PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
 
 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
   __ bind(_entry);
-  address a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
+  address a = Runtime1::entry_for(StubId::c1_predicate_failed_trap_id);
   __ far_call(RuntimeAddress(a));
   ce->add_call_info_here(_info);
   ce->verify_oop_map(_info);
@@ -111,7 +111,7 @@ void DivByZeroStub::emit_code(LIR_Assembler* ce) {
     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
   }
   __ bind(_entry);
-  __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::throw_div0_exception_id)));
+  __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_throw_div0_exception_id)));
   ce->add_call_info_here(_info);
   ce->verify_oop_map(_info);
 #ifdef ASSERT
@@ -123,14 +123,14 @@ void DivByZeroStub::emit_code(LIR_Assembler* ce) {
 
 // Implementation of NewInstanceStub
 
-NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, C1StubId stub_id) {
+NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, StubId stub_id) {
   _result = result;
   _klass = klass;
   _klass_reg = klass_reg;
   _info = new CodeEmitInfo(info);
-  assert(stub_id == C1StubId::new_instance_id                 ||
-         stub_id == C1StubId::fast_new_instance_id            ||
-         stub_id == C1StubId::fast_new_instance_init_check_id,
+  assert(stub_id == StubId::c1_new_instance_id                 ||
+         stub_id == StubId::c1_fast_new_instance_id            ||
+         stub_id == StubId::c1_fast_new_instance_init_check_id,
          "need new_instance id");
   _stub_id   = stub_id;
 }
@@ -166,7 +166,7 @@ void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
   __ bind(_entry);
   assert(_length->as_register() == r19, "length must in r19,");
   assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
-  __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_type_array_id)));
+  __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_new_type_array_id)));
   ce->add_call_info_here(_info);
   ce->verify_oop_map(_info);
   assert(_result->as_register() == r0, "result must in r0");
@@ -189,7 +189,7 @@ void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
   __ bind(_entry);
   assert(_length->as_register() == r19, "length must in r19,");
   assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
-  __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_object_array_id)));
+  __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_new_object_array_id)));
   ce->add_call_info_here(_info);
   ce->verify_oop_map(_info);
   assert(_result->as_register() == r0, "result must in r0");
@@ -201,11 +201,11 @@ void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
   __ bind(_entry);
   ce->store_parameter(_obj_reg->as_register(),  1);
   ce->store_parameter(_lock_reg->as_register(), 0);
-  C1StubId enter_id;
+  StubId enter_id;
   if (ce->compilation()->has_fpu_code()) {
-    enter_id = C1StubId::monitorenter_id;
+    enter_id = StubId::c1_monitorenter_id;
   } else {
-    enter_id = C1StubId::monitorenter_nofpu_id;
+    enter_id = StubId::c1_monitorenter_nofpu_id;
   }
   __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
   ce->add_call_info_here(_info);
@@ -222,11 +222,11 @@ void MonitorExitStub::emit_code(LIR_Assembler* ce) {
   }
   ce->store_parameter(_lock_reg->as_register(), 0);
   // note: non-blocking leaf routine => no call info needed
-  C1StubId exit_id;
+  StubId exit_id;
   if (ce->compilation()->has_fpu_code()) {
-    exit_id = C1StubId::monitorexit_id;
+    exit_id = StubId::c1_monitorexit_id;
   } else {
-    exit_id = C1StubId::monitorexit_nofpu_id;
+    exit_id = StubId::c1_monitorexit_nofpu_id;
   }
   __ adr(lr, _continuation);
   __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
@@ -254,7 +254,7 @@ void PatchingStub::emit_code(LIR_Assembler* ce) {
 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
   __ bind(_entry);
   ce->store_parameter(_trap_request, 0);
-  __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::deoptimize_id)));
+  __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_deoptimize_id)));
   ce->add_call_info_here(_info);
   DEBUG_ONLY(__ should_not_reach_here());
 }
@@ -264,9 +264,9 @@ void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
   address a;
   if (_info->deoptimize_on_exception()) {
     // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
-    a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
+    a = Runtime1::entry_for(StubId::c1_predicate_failed_trap_id);
   } else {
-    a = Runtime1::entry_for(C1StubId::throw_null_pointer_exception_id);
+    a = Runtime1::entry_for(StubId::c1_throw_null_pointer_exception_id);
   }
 
   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());

src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp

@@ -320,19 +320,19 @@ void LIR_Assembler::deoptimize_trap(CodeEmitInfo *info) {
 
   switch (patching_id(info)) {
   case PatchingStub::access_field_id:
-    target = Runtime1::entry_for(C1StubId::access_field_patching_id);
+    target = Runtime1::entry_for(StubId::c1_access_field_patching_id);
     reloc_type = relocInfo::section_word_type;
     break;
   case PatchingStub::load_klass_id:
-    target = Runtime1::entry_for(C1StubId::load_klass_patching_id);
+    target = Runtime1::entry_for(StubId::c1_load_klass_patching_id);
     reloc_type = relocInfo::metadata_type;
     break;
   case PatchingStub::load_mirror_id:
-    target = Runtime1::entry_for(C1StubId::load_mirror_patching_id);
+    target = Runtime1::entry_for(StubId::c1_load_mirror_patching_id);
     reloc_type = relocInfo::oop_type;
     break;
   case PatchingStub::load_appendix_id:
-    target = Runtime1::entry_for(C1StubId::load_appendix_patching_id);
+    target = Runtime1::entry_for(StubId::c1_load_appendix_patching_id);
     reloc_type = relocInfo::oop_type;
     break;
   default: ShouldNotReachHere();
@@ -374,7 +374,7 @@ int LIR_Assembler::emit_exception_handler() {
   __ verify_not_null_oop(r0);
 
   // search an exception handler (r0: exception oop, r3: throwing pc)
-  __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::handle_exception_from_callee_id)));
+  __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_handle_exception_from_callee_id)));
   __ should_not_reach_here();
   guarantee(code_offset() - offset <= exception_handler_size(), "overflow");
   __ end_a_stub();
@@ -431,7 +431,7 @@ int LIR_Assembler::emit_unwind_handler() {
   // remove the activation and dispatch to the unwind handler
   __ block_comment("remove_frame and dispatch to the unwind handler");
   __ remove_frame(initial_frame_size_in_bytes());
-  __ far_jump(RuntimeAddress(Runtime1::entry_for(C1StubId::unwind_exception_id)));
+  __ far_jump(RuntimeAddress(Runtime1::entry_for(StubId::c1_unwind_exception_id)));
 
   // Emit the slow path assembly
   if (stub != nullptr) {
@@ -483,7 +483,7 @@ void LIR_Assembler::return_op(LIR_Opr result, C1SafepointPollStub* code_stub) {
 
   code_stub->set_safepoint_offset(__ offset());
   __ relocate(relocInfo::poll_return_type);
-  __ safepoint_poll(*code_stub->entry(), true /* at_return */, false /* acquire */, true /* in_nmethod */);
+  __ safepoint_poll(*code_stub->entry(), true /* at_return */, true /* in_nmethod */);
   __ ret(lr);
 }
 
@@ -874,19 +874,19 @@ void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
 
   switch (patching_id(info)) {
   case PatchingStub::access_field_id:
-    target = Runtime1::entry_for(C1StubId::access_field_patching_id);
+    target = Runtime1::entry_for(StubId::c1_access_field_patching_id);
     reloc_type = relocInfo::section_word_type;
     break;
   case PatchingStub::load_klass_id:
-    target = Runtime1::entry_for(C1StubId::load_klass_patching_id);
+    target = Runtime1::entry_for(StubId::c1_load_klass_patching_id);
     reloc_type = relocInfo::metadata_type;
     break;
   case PatchingStub::load_mirror_id:
-    target = Runtime1::entry_for(C1StubId::load_mirror_patching_id);
+    target = Runtime1::entry_for(StubId::c1_load_mirror_patching_id);
     reloc_type = relocInfo::oop_type;
     break;
   case PatchingStub::load_appendix_id:
-    target = Runtime1::entry_for(C1StubId::load_appendix_patching_id);
+    target = Runtime1::entry_for(StubId::c1_load_appendix_patching_id);
     reloc_type = relocInfo::oop_type;
     break;
   default: ShouldNotReachHere();
@@ -1358,7 +1358,7 @@ void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, L
         __ br(Assembler::EQ, *success_target);
 
         __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
-        __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
+        __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_slow_subtype_check_id)));
         __ ldr(klass_RInfo, Address(__ post(sp, 2 * wordSize)));
         // result is a boolean
         __ cbzw(klass_RInfo, *failure_target);
@@ -1369,7 +1369,7 @@ void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, L
       __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
       // call out-of-line instance of __ check_klass_subtype_slow_path(...):
       __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
-      __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
+      __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_slow_subtype_check_id)));
       __ ldp(k_RInfo, klass_RInfo, Address(__ post(sp, 2 * wordSize)));
       // result is a boolean
       __ cbz(k_RInfo, *failure_target);
@@ -1447,7 +1447,7 @@ void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
     __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
     // call out-of-line instance of __ check_klass_subtype_slow_path(...):
     __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
-    __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
+    __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_slow_subtype_check_id)));
     __ ldp(k_RInfo, klass_RInfo, Address(__ post(sp, 2 * wordSize)));
     // result is a boolean
     __ cbzw(k_RInfo, *failure_target);
@@ -2033,7 +2033,7 @@ void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmit
   // exception object is not added to oop map by LinearScan
   // (LinearScan assumes that no oops are in fixed registers)
   info->add_register_oop(exceptionOop);
-  C1StubId unwind_id;
+  StubId unwind_id;
 
   // get current pc information
   // pc is only needed if the method has an exception handler, the unwind code does not need it.
@@ -2052,9 +2052,9 @@ void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmit
   __ verify_not_null_oop(r0);
   // search an exception handler (r0: exception oop, r3: throwing pc)
   if (compilation()->has_fpu_code()) {
-    unwind_id = C1StubId::handle_exception_id;
+    unwind_id = StubId::c1_handle_exception_id;
   } else {
-    unwind_id = C1StubId::handle_exception_nofpu_id;
+    unwind_id = StubId::c1_handle_exception_nofpu_id;
   }
   __ far_call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
 
@@ -2325,7 +2325,7 @@ void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
       __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, nullptr);
 
       __ PUSH(src, dst);
-      __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
+      __ far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_slow_subtype_check_id)));
       __ POP(src, dst);
 
       __ cbnz(src, cont);

src/hotspot/cpu/aarch64/c1_LIRGenerator_aarch64.cpp

@@ -1245,7 +1245,7 @@ void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
   args->append(rank);
   args->append(varargs);
   LIR_Opr reg = result_register_for(x->type());
-  __ call_runtime(Runtime1::entry_for(C1StubId::new_multi_array_id),
+  __ call_runtime(Runtime1::entry_for(StubId::c1_new_multi_array_id),
                   LIR_OprFact::illegalOpr,
                   reg, args, info);
 
@@ -1276,14 +1276,14 @@ void LIRGenerator::do_CheckCast(CheckCast* x) {
   CodeStub* stub;
   if (x->is_incompatible_class_change_check()) {
     assert(patching_info == nullptr, "can't patch this");
-    stub = new SimpleExceptionStub(C1StubId::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
+    stub = new SimpleExceptionStub(StubId::c1_throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
   } else if (x->is_invokespecial_receiver_check()) {
     assert(patching_info == nullptr, "can't patch this");
     stub = new DeoptimizeStub(info_for_exception,
                               Deoptimization::Reason_class_check,
                               Deoptimization::Action_none);
   } else {
-    stub = new SimpleExceptionStub(C1StubId::throw_class_cast_exception_id, obj.result(), info_for_exception);
+    stub = new SimpleExceptionStub(StubId::c1_throw_class_cast_exception_id, obj.result(), info_for_exception);
   }
   LIR_Opr reg = rlock_result(x);
   LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
@@ -1318,7 +1318,7 @@ void LIRGenerator::do_InstanceOf(InstanceOf* x) {
 
 // Intrinsic for Class::isInstance
 address LIRGenerator::isInstance_entry() {
-  return Runtime1::entry_for(C1StubId::is_instance_of_id);
+  return Runtime1::entry_for(StubId::c1_is_instance_of_id);
 }
 
 void LIRGenerator::do_If(If* x) {

src/hotspot/cpu/aarch64/c1_MacroAssembler_aarch64.cpp

@@ -271,7 +271,7 @@ void C1_MacroAssembler::initialize_object(Register obj, Register klass, Register
 
   if (CURRENT_ENV->dtrace_alloc_probes()) {
     assert(obj == r0, "must be");
-    far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::dtrace_object_alloc_id)));
+    far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_dtrace_object_alloc_id)));
   }
 
   verify_oop(obj);
@@ -312,7 +312,7 @@ void C1_MacroAssembler::allocate_array(Register obj, Register len, Register t1,
 
   if (CURRENT_ENV->dtrace_alloc_probes()) {
     assert(obj == r0, "must be");
-    far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::dtrace_object_alloc_id)));
+    far_call(RuntimeAddress(Runtime1::entry_for(StubId::c1_dtrace_object_alloc_id)));
   }
 
   verify_oop(obj);

src/hotspot/cpu/aarch64/c1_Runtime1_aarch64.cpp

@@ -99,10 +99,10 @@ int StubAssembler::call_RT(Register oop_result1, Register metadata_result, addre
     if (frame_size() == no_frame_size) {
       leave();
       far_jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
-    } else if (_stub_id == (int)C1StubId::forward_exception_id) {
+    } else if (_stub_id == (int)StubId::c1_forward_exception_id) {
       should_not_reach_here();
     } else {
-      far_jump(RuntimeAddress(Runtime1::entry_for(C1StubId::forward_exception_id)));
+      far_jump(RuntimeAddress(Runtime1::entry_for(StubId::c1_forward_exception_id)));
     }
     bind(L);
   }
@@ -350,8 +350,8 @@ void Runtime1::initialize_pd() {
 // return: offset in 64-bit words.
 uint Runtime1::runtime_blob_current_thread_offset(frame f) {
   CodeBlob* cb = f.cb();
-  assert(cb == Runtime1::blob_for(C1StubId::monitorenter_id) ||
-         cb == Runtime1::blob_for(C1StubId::monitorenter_nofpu_id), "must be");
+  assert(cb == Runtime1::blob_for(StubId::c1_monitorenter_id) ||
+         cb == Runtime1::blob_for(StubId::c1_monitorenter_nofpu_id), "must be");
   assert(cb != nullptr && cb->is_runtime_stub(), "invalid frame");
   int offset = cpu_reg_save_offsets[rthread->encoding()];
   return offset / 2;   // SP offsets are in halfwords
@@ -377,7 +377,7 @@ OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address targe
 }
 
 
-OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler *sasm) {
+OopMapSet* Runtime1::generate_handle_exception(StubId id, StubAssembler *sasm) {
   __ block_comment("generate_handle_exception");
 
   // incoming parameters
@@ -389,7 +389,7 @@ OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler *sasm)
   OopMapSet* oop_maps = new OopMapSet();
   OopMap* oop_map = nullptr;
   switch (id) {
-  case C1StubId::forward_exception_id:
+  case StubId::c1_forward_exception_id:
     // We're handling an exception in the context of a compiled frame.
     // The registers have been saved in the standard places.  Perform
     // an exception lookup in the caller and dispatch to the handler
@@ -409,12 +409,12 @@ OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler *sasm)
     __ str(zr, Address(rthread, JavaThread::vm_result_oop_offset()));
     __ str(zr, Address(rthread, JavaThread::vm_result_metadata_offset()));
     break;
-  case C1StubId::handle_exception_nofpu_id:
-  case C1StubId::handle_exception_id:
+  case StubId::c1_handle_exception_nofpu_id:
+  case StubId::c1_handle_exception_id:
     // At this point all registers MAY be live.
-    oop_map = save_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id);
+    oop_map = save_live_registers(sasm, id != StubId::c1_handle_exception_nofpu_id);
     break;
-  case C1StubId::handle_exception_from_callee_id: {
+  case StubId::c1_handle_exception_from_callee_id: {
     // At this point all registers except exception oop (r0) and
     // exception pc (lr) are dead.
     const int frame_size = 2 /*fp, return address*/;
@@ -472,13 +472,13 @@ OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler *sasm)
   __ str(r0, Address(rfp, 1*BytesPerWord));
 
   switch (id) {
-  case C1StubId::forward_exception_id:
-  case C1StubId::handle_exception_nofpu_id:
-  case C1StubId::handle_exception_id:
+  case StubId::c1_forward_exception_id:
+  case StubId::c1_handle_exception_nofpu_id:
+  case StubId::c1_handle_exception_id:
     // Restore the registers that were saved at the beginning.
-    restore_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id);
+    restore_live_registers(sasm, id != StubId::c1_handle_exception_nofpu_id);
     break;
-  case C1StubId::handle_exception_from_callee_id:
+  case StubId::c1_handle_exception_from_callee_id:
     break;
   default:  ShouldNotReachHere();
   }
@@ -630,7 +630,7 @@ OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
 }
 
 
-OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
+OopMapSet* Runtime1::generate_code_for(StubId id, StubAssembler* sasm) {
 
   const Register exception_oop = r0;
   const Register exception_pc  = r3;
@@ -647,7 +647,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
   OopMap* oop_map = nullptr;
   switch (id) {
     {
-    case C1StubId::forward_exception_id:
+    case StubId::c1_forward_exception_id:
       {
         oop_maps = generate_handle_exception(id, sasm);
         __ leave();
@@ -655,31 +655,31 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::throw_div0_exception_id:
+    case StubId::c1_throw_div0_exception_id:
       { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments, does_not_return);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
       }
       break;
 
-    case C1StubId::throw_null_pointer_exception_id:
+    case StubId::c1_throw_null_pointer_exception_id:
       { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments, does_not_return);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
       }
       break;
 
-    case C1StubId::new_instance_id:
-    case C1StubId::fast_new_instance_id:
-    case C1StubId::fast_new_instance_init_check_id:
+    case StubId::c1_new_instance_id:
+    case StubId::c1_fast_new_instance_id:
+    case StubId::c1_fast_new_instance_init_check_id:
       {
         Register klass = r3; // Incoming
         Register obj   = r0; // Result
 
-        if (id == C1StubId::new_instance_id) {
+        if (id == StubId::c1_new_instance_id) {
           __ set_info("new_instance", dont_gc_arguments);
-        } else if (id == C1StubId::fast_new_instance_id) {
+        } else if (id == StubId::c1_fast_new_instance_id) {
           __ set_info("fast new_instance", dont_gc_arguments);
         } else {
-          assert(id == C1StubId::fast_new_instance_init_check_id, "bad C1StubId");
+          assert(id == StubId::c1_fast_new_instance_init_check_id, "bad StubId");
           __ set_info("fast new_instance init check", dont_gc_arguments);
         }
 
@@ -698,7 +698,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
 
       break;
 
-    case C1StubId::counter_overflow_id:
+    case StubId::c1_counter_overflow_id:
       {
         Register bci = r0, method = r1;
         __ enter();
@@ -716,14 +716,14 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::new_type_array_id:
-    case C1StubId::new_object_array_id:
+    case StubId::c1_new_type_array_id:
+    case StubId::c1_new_object_array_id:
       {
         Register length   = r19; // Incoming
         Register klass    = r3; // Incoming
         Register obj      = r0; // Result
 
-        if (id == C1StubId::new_type_array_id) {
+        if (id == StubId::c1_new_type_array_id) {
           __ set_info("new_type_array", dont_gc_arguments);
         } else {
           __ set_info("new_object_array", dont_gc_arguments);
@@ -736,7 +736,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
           Register t0 = obj;
           __ ldrw(t0, Address(klass, Klass::layout_helper_offset()));
           __ asrw(t0, t0, Klass::_lh_array_tag_shift);
-          int tag = ((id == C1StubId::new_type_array_id)
+          int tag = ((id == StubId::c1_new_type_array_id)
                      ? Klass::_lh_array_tag_type_value
                      : Klass::_lh_array_tag_obj_value);
           __ mov(rscratch1, tag);
@@ -751,7 +751,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
         __ enter();
         OopMap* map = save_live_registers(sasm);
         int call_offset;
-        if (id == C1StubId::new_type_array_id) {
+        if (id == StubId::c1_new_type_array_id) {
           call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
         } else {
           call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
@@ -769,7 +769,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::new_multi_array_id:
+    case StubId::c1_new_multi_array_id:
       { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
         // r0,: klass
         // r19,: rank
@@ -789,7 +789,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::register_finalizer_id:
+    case StubId::c1_register_finalizer_id:
       {
         __ set_info("register_finalizer", dont_gc_arguments);
 
@@ -821,19 +821,19 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::throw_class_cast_exception_id:
+    case StubId::c1_throw_class_cast_exception_id:
       { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments, does_not_return);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
       }
       break;
 
-    case C1StubId::throw_incompatible_class_change_error_id:
+    case StubId::c1_throw_incompatible_class_change_error_id:
       { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments, does_not_return);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
       }
       break;
 
-    case C1StubId::slow_subtype_check_id:
+    case StubId::c1_slow_subtype_check_id:
       {
         // Typical calling sequence:
         // __ push(klass_RInfo);  // object klass or other subclass
@@ -882,10 +882,10 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::monitorenter_nofpu_id:
+    case StubId::c1_monitorenter_nofpu_id:
       save_fpu_registers = false;
       // fall through
-    case C1StubId::monitorenter_id:
+    case StubId::c1_monitorenter_id:
       {
         StubFrame f(sasm, "monitorenter", dont_gc_arguments, requires_pop_epilogue_return);
         OopMap* map = save_live_registers(sasm, save_fpu_registers);
@@ -903,7 +903,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::is_instance_of_id:
+    case StubId::c1_is_instance_of_id:
       {
         // Mirror: c_rarg0
         // Object: c_rarg1
@@ -952,10 +952,10 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::monitorexit_nofpu_id:
+    case StubId::c1_monitorexit_nofpu_id:
       save_fpu_registers = false;
       // fall through
-    case C1StubId::monitorexit_id:
+    case StubId::c1_monitorexit_id:
       {
         StubFrame f(sasm, "monitorexit", dont_gc_arguments);
         OopMap* map = save_live_registers(sasm, save_fpu_registers);
@@ -975,7 +975,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::deoptimize_id:
+    case StubId::c1_deoptimize_id:
       {
         StubFrame f(sasm, "deoptimize", dont_gc_arguments, does_not_return);
         OopMap* oop_map = save_live_registers(sasm);
@@ -992,13 +992,13 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::throw_range_check_failed_id:
+    case StubId::c1_throw_range_check_failed_id:
       { StubFrame f(sasm, "range_check_failed", dont_gc_arguments, does_not_return);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
       }
       break;
 
-    case C1StubId::unwind_exception_id:
+    case StubId::c1_unwind_exception_id:
       { __ set_info("unwind_exception", dont_gc_arguments);
         // note: no stubframe since we are about to leave the current
         //       activation and we are calling a leaf VM function only.
@@ -1006,54 +1006,54 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::access_field_patching_id:
+    case StubId::c1_access_field_patching_id:
       { StubFrame f(sasm, "access_field_patching", dont_gc_arguments, does_not_return);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
       }
       break;
 
-    case C1StubId::load_klass_patching_id:
+    case StubId::c1_load_klass_patching_id:
       { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments, does_not_return);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
       }
       break;
 
-    case C1StubId::load_mirror_patching_id:
+    case StubId::c1_load_mirror_patching_id:
       { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments, does_not_return);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
       }
       break;
 
-    case C1StubId::load_appendix_patching_id:
+    case StubId::c1_load_appendix_patching_id:
       { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments, does_not_return);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
       }
       break;
 
-    case C1StubId::handle_exception_nofpu_id:
-    case C1StubId::handle_exception_id:
+    case StubId::c1_handle_exception_nofpu_id:
+    case StubId::c1_handle_exception_id:
       { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
         oop_maps = generate_handle_exception(id, sasm);
       }
       break;
 
-    case C1StubId::handle_exception_from_callee_id:
+    case StubId::c1_handle_exception_from_callee_id:
       { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
         oop_maps = generate_handle_exception(id, sasm);
       }
       break;
 
-    case C1StubId::throw_index_exception_id:
+    case StubId::c1_throw_index_exception_id:
       { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments, does_not_return);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
       }
       break;
 
-    case C1StubId::throw_array_store_exception_id:
+    case StubId::c1_throw_array_store_exception_id:
       { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments, does_not_return);
         // tos + 0: link
         //     + 1: return address
@@ -1061,7 +1061,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::predicate_failed_trap_id:
+    case StubId::c1_predicate_failed_trap_id:
       {
         StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments, does_not_return);
 
@@ -1079,7 +1079,7 @@ OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
       }
       break;
 
-    case C1StubId::dtrace_object_alloc_id:
+    case StubId::c1_dtrace_object_alloc_id:
       { // c_rarg0: object
         StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
         save_live_registers(sasm);

src/hotspot/cpu/aarch64/c1_globals_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -43,15 +43,15 @@ define_pd_global(intx, CompileThreshold,             1500 );
 
 define_pd_global(intx, OnStackReplacePercentage,     933  );
 define_pd_global(intx, NewSizeThreadIncrease,        4*K  );
-define_pd_global(intx, InitialCodeCacheSize,         160*K);
-define_pd_global(intx, ReservedCodeCacheSize,        32*M );
-define_pd_global(intx, NonProfiledCodeHeapSize,      13*M );
-define_pd_global(intx, ProfiledCodeHeapSize,         14*M );
-define_pd_global(intx, NonNMethodCodeHeapSize,       5*M  );
+define_pd_global(size_t, InitialCodeCacheSize,       160*K);
+define_pd_global(size_t, ReservedCodeCacheSize,      32*M );
+define_pd_global(size_t, NonProfiledCodeHeapSize,    13*M );
+define_pd_global(size_t, ProfiledCodeHeapSize,       14*M );
+define_pd_global(size_t, NonNMethodCodeHeapSize,     5*M  );
 define_pd_global(bool, ProfileInterpreter,           false);
-define_pd_global(intx, CodeCacheExpansionSize,       32*K );
-define_pd_global(uintx, CodeCacheMinBlockLength,     1);
-define_pd_global(uintx, CodeCacheMinimumUseSpace,    400*K);
+define_pd_global(size_t, CodeCacheExpansionSize,     32*K );
+define_pd_global(size_t, CodeCacheMinBlockLength,    1);
+define_pd_global(size_t, CodeCacheMinimumUseSpace,   400*K);
 define_pd_global(bool, NeverActAsServerClassMachine, true );
 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 define_pd_global(bool, CICompileOSR,                 true );

src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp

@@ -107,7 +107,8 @@ address C2_MacroAssembler::arrays_hashcode(Register ary, Register cnt, Register
   assert(is_power_of_2(unroll_factor), "can't use this value to calculate the jump target PC");
   andr(tmp2, cnt, unroll_factor - 1);
   adr(tmp1, BR_BASE);
-  sub(tmp1, tmp1, tmp2, ext::sxtw, 3);
+  // For Cortex-A53 offset is 4 because 2 nops are generated.
+  sub(tmp1, tmp1, tmp2, ext::sxtw, VM_Version::supports_a53mac() ? 4 : 3);
   movw(tmp2, 0x1f);
   br(tmp1);
 
@@ -115,6 +116,11 @@ address C2_MacroAssembler::arrays_hashcode(Register ary, Register cnt, Register
   for (size_t i = 0; i < unroll_factor; ++i) {
     load(tmp1, Address(post(ary, type2aelembytes(eltype))), eltype);
     maddw(result, result, tmp2, tmp1);
+    // maddw generates an extra nop for Cortex-A53 (see maddw definition in macroAssembler).
+    // Generate 2nd nop to have 4 instructions per iteration.
+    if (VM_Version::supports_a53mac()) {
+      nop();
+    }
   }
   bind(BR_BASE);
   subsw(cnt, cnt, unroll_factor);
@@ -1772,19 +1778,21 @@ void C2_MacroAssembler::sve_vmask_lasttrue(Register dst, BasicType bt, PRegister
 void C2_MacroAssembler::neon_vector_extend(FloatRegister dst, BasicType dst_bt, unsigned dst_vlen_in_bytes,
                                            FloatRegister src, BasicType src_bt, bool is_unsigned) {
   if (src_bt == T_BYTE) {
-    if (dst_bt == T_SHORT) {
-      // 4B/8B to 4S/8S
-      _xshll(is_unsigned, dst, T8H, src, T8B, 0);
-    } else {
-      // 4B to 4I
-      assert(dst_vlen_in_bytes == 16 && dst_bt == T_INT, "unsupported");
-      _xshll(is_unsigned, dst, T8H, src, T8B, 0);
+    // 4B to 4S/4I, 8B to 8S
+    assert(dst_vlen_in_bytes == 8 || dst_vlen_in_bytes == 16, "unsupported");
+    assert(dst_bt == T_SHORT || dst_bt == T_INT, "unsupported");
+    _xshll(is_unsigned, dst, T8H, src, T8B, 0);
+    if (dst_bt == T_INT) {
       _xshll(is_unsigned, dst, T4S, dst, T4H, 0);
     }
   } else if (src_bt == T_SHORT) {
-    // 4S to 4I
-    assert(dst_vlen_in_bytes == 16 && dst_bt == T_INT, "unsupported");
+    // 2S to 2I/2L, 4S to 4I
+    assert(dst_vlen_in_bytes == 8 || dst_vlen_in_bytes == 16, "unsupported");
+    assert(dst_bt == T_INT || dst_bt == T_LONG, "unsupported");
     _xshll(is_unsigned, dst, T4S, src, T4H, 0);
+    if (dst_bt == T_LONG) {
+      _xshll(is_unsigned, dst, T2D, dst, T2S, 0);
+    }
   } else if (src_bt == T_INT) {
     // 2I to 2L
     assert(dst_vlen_in_bytes == 16 && dst_bt == T_LONG, "unsupported");
@@ -1804,18 +1812,21 @@ void C2_MacroAssembler::neon_vector_narrow(FloatRegister dst, BasicType dst_bt,
     assert(dst_bt == T_BYTE, "unsupported");
     xtn(dst, T8B, src, T8H);
   } else if (src_bt == T_INT) {
-    // 4I to 4B/4S
-    assert(src_vlen_in_bytes == 16, "unsupported");
+    // 2I to 2S, 4I to 4B/4S
+    assert(src_vlen_in_bytes == 8 || src_vlen_in_bytes == 16, "unsupported");
     assert(dst_bt == T_BYTE || dst_bt == T_SHORT, "unsupported");
     xtn(dst, T4H, src, T4S);
     if (dst_bt == T_BYTE) {
       xtn(dst, T8B, dst, T8H);
     }
   } else if (src_bt == T_LONG) {
-    // 2L to 2I
+    // 2L to 2S/2I
     assert(src_vlen_in_bytes == 16, "unsupported");
-    assert(dst_bt == T_INT, "unsupported");
+    assert(dst_bt == T_INT || dst_bt == T_SHORT, "unsupported");
     xtn(dst, T2S, src, T2D);
+    if (dst_bt == T_SHORT) {
+      xtn(dst, T4H, dst, T4S);
+    }
   } else {
     ShouldNotReachHere();
   }

src/hotspot/cpu/aarch64/c2_globals_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -51,8 +51,8 @@ define_pd_global(intx, NewSizeThreadIncrease, ScaleForWordSize(4*K));
 define_pd_global(intx, LoopUnrollLimit,              60);
 define_pd_global(intx, LoopPercentProfileLimit,      10);
 // InitialCodeCacheSize derived from specjbb2000 run.
-define_pd_global(intx, InitialCodeCacheSize,         2496*K); // Integral multiple of CodeCacheExpansionSize
-define_pd_global(intx, CodeCacheExpansionSize,       64*K);
+define_pd_global(size_t, InitialCodeCacheSize,       2496*K); // Integral multiple of CodeCacheExpansionSize
+define_pd_global(size_t, CodeCacheExpansionSize,     64*K);
 
 // Ergonomics related flags
 define_pd_global(uint64_t,MaxRAM,                    128ULL*G);
@@ -69,12 +69,12 @@ define_pd_global(bool, SuperWordLoopUnrollAnalysis,  true);
 define_pd_global(uint, SuperWordStoreToLoadForwardingFailureDetection, 8);
 define_pd_global(bool, IdealizeClearArrayNode,       true);
 
-define_pd_global(intx, ReservedCodeCacheSize,        48*M);
-define_pd_global(intx, NonProfiledCodeHeapSize,      21*M);
-define_pd_global(intx, ProfiledCodeHeapSize,         22*M);
-define_pd_global(intx, NonNMethodCodeHeapSize,       5*M );
-define_pd_global(uintx, CodeCacheMinBlockLength,     6);
-define_pd_global(uintx, CodeCacheMinimumUseSpace,    400*K);
+define_pd_global(size_t, ReservedCodeCacheSize,      48*M);
+define_pd_global(size_t, NonProfiledCodeHeapSize,    21*M);
+define_pd_global(size_t, ProfiledCodeHeapSize,       22*M);
+define_pd_global(size_t, NonNMethodCodeHeapSize,     5*M );
+define_pd_global(size_t, CodeCacheMinBlockLength,    6);
+define_pd_global(size_t, CodeCacheMinimumUseSpace,   400*K);
 
 // Ergonomics related flags
 define_pd_global(bool, NeverActAsServerClassMachine, false);

src/hotspot/cpu/aarch64/compiledIC_aarch64.cpp

@@ -90,13 +90,15 @@ void CompiledDirectCall::set_to_interpreted(const methodHandle& callee, address
     = nativeMovConstReg_at(stub + NativeInstruction::instruction_size);
 
 #ifdef ASSERT
-  NativeGeneralJump* jump = nativeGeneralJump_at(method_holder->next_instruction_address());
+  NativeJump* jump = MacroAssembler::codestub_branch_needs_far_jump()
+                         ? nativeGeneralJump_at(method_holder->next_instruction_address())
+                         : nativeJump_at(method_holder->next_instruction_address());
   verify_mt_safe(callee, entry, method_holder, jump);
 #endif
 
   // Update stub.
   method_holder->set_data((intptr_t)callee());
-  NativeGeneralJump::insert_unconditional(method_holder->next_instruction_address(), entry);
+  MacroAssembler::pd_patch_instruction(method_holder->next_instruction_address(), entry);
   ICache::invalidate_range(stub, to_interp_stub_size());
   // Update jump to call.
   set_destination_mt_safe(stub);

src/hotspot/cpu/aarch64/downcallLinker_aarch64.cpp

@@ -289,7 +289,7 @@ void DowncallLinker::StubGenerator::generate() {
 
     __ verify_sve_vector_length(tmp1);
 
-    __ safepoint_poll(L_safepoint_poll_slow_path, true /* at_return */, true /* acquire */, false /* in_nmethod */, tmp1);
+    __ safepoint_poll(L_safepoint_poll_slow_path, true /* at_return */, false /* in_nmethod */, tmp1);
 
     __ ldrw(tmp1, Address(rthread, JavaThread::suspend_flags_offset()));
     __ cbnzw(tmp1, L_safepoint_poll_slow_path);

src/hotspot/cpu/aarch64/frame_aarch64.cpp

@@ -441,8 +441,8 @@ JavaThread** frame::saved_thread_address(const frame& f) {
 
   JavaThread** thread_addr;
 #ifdef COMPILER1
-  if (cb == Runtime1::blob_for(C1StubId::monitorenter_id) ||
-      cb == Runtime1::blob_for(C1StubId::monitorenter_nofpu_id)) {
+  if (cb == Runtime1::blob_for(StubId::c1_monitorenter_id) ||
+      cb == Runtime1::blob_for(StubId::c1_monitorenter_nofpu_id)) {
     thread_addr = (JavaThread**)(f.sp() + Runtime1::runtime_blob_current_thread_offset(f));
   } else
 #endif
@@ -828,7 +828,6 @@ void JavaFrameAnchor::make_walkable() {
   // already walkable?
   if (walkable()) return;
   vmassert(last_Java_sp() != nullptr, "not called from Java code?");
-  vmassert(last_Java_pc() == nullptr, "already walkable");
   _last_Java_pc = (address)_last_Java_sp[-1];
   vmassert(walkable(), "something went wrong");
 }

src/hotspot/cpu/aarch64/frame_aarch64.inline.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -35,6 +35,53 @@
 
 // Inline functions for AArch64 frames:
 
+#if INCLUDE_JFR
+
+// Static helper routines
+
+inline address frame::interpreter_bcp(const intptr_t* fp) {
+  assert(fp != nullptr, "invariant");
+  return reinterpret_cast<address>(fp[frame::interpreter_frame_bcp_offset]);
+}
+
+inline address frame::interpreter_return_address(const intptr_t* fp) {
+  assert(fp != nullptr, "invariant");
+  return reinterpret_cast<address>(fp[frame::return_addr_offset]);
+}
+
+inline intptr_t* frame::interpreter_sender_sp(const intptr_t* fp) {
+  assert(fp != nullptr, "invariant");
+  return reinterpret_cast<intptr_t*>(fp[frame::interpreter_frame_sender_sp_offset]);
+}
+
+inline bool frame::is_interpreter_frame_setup_at(const intptr_t* fp, const void* sp) {
+  assert(fp != nullptr, "invariant");
+  assert(sp != nullptr, "invariant");
+  return sp <= fp + frame::interpreter_frame_initial_sp_offset;
+}
+
+inline intptr_t* frame::sender_sp(intptr_t* fp) {
+  assert(fp != nullptr, "invariant");
+  return fp + frame::sender_sp_offset;
+}
+
+inline intptr_t* frame::link(const intptr_t* fp) {
+  assert(fp != nullptr, "invariant");
+  return reinterpret_cast<intptr_t*>(fp[frame::link_offset]);
+}
+
+inline address frame::return_address(const intptr_t* sp) {
+  assert(sp != nullptr, "invariant");
+  return reinterpret_cast<address>(sp[-1]);
+}
+
+inline intptr_t* frame::fp(const intptr_t* sp) {
+  assert(sp != nullptr, "invariant");
+  return reinterpret_cast<intptr_t*>(sp[-2]);
+}
+
+#endif // INCLUDE_JFR
+
 // Constructors:
 
 inline frame::frame() {

src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad

@@ -106,6 +106,13 @@ instruct zLoadP(iRegPNoSp dst, memory8 mem, rFlagsReg cr)
   match(Set dst (LoadP mem));
   predicate(UseZGC && !needs_acquiring_load(n) && n->as_Load()->barrier_data() != 0);
   effect(TEMP dst, KILL cr);
+  // The main load is a candidate to implement implicit null checks, as long as
+  // legitimize_address() does not require a preceding lea instruction to
+  // materialize the memory operand. The absence of a preceding lea instruction
+  // is guaranteed for immLoffset8 memory operands, because these do not lead to
+  // out-of-range offsets (see definition of immLoffset8). Fortunately,
+  // immLoffset8 memory operands are the most common ones in practice.
+  ins_is_late_expanded_null_check_candidate(opnd_array(1)->opcode() == INDOFFL8);
 
   ins_cost(4 * INSN_COST);
 
@@ -117,7 +124,11 @@ instruct zLoadP(iRegPNoSp dst, memory8 mem, rFlagsReg cr)
       // Fix up any out-of-range offsets.
       assert_different_registers(rscratch2, as_Register($mem$$base));
       assert_different_registers(rscratch2, $dst$$Register);
-      ref_addr = __ legitimize_address(ref_addr, 8, rscratch2);
+      int size = 8;
+      assert(!this->is_late_expanded_null_check_candidate() ||
+             !MacroAssembler::legitimize_address_requires_lea(ref_addr, size),
+             "an instruction that can be used for implicit null checking should emit the candidate memory access first");
+      ref_addr = __ legitimize_address(ref_addr, size, rscratch2);
     }
     __ ldr($dst$$Register, ref_addr);
     z_load_barrier(masm, this, ref_addr, $dst$$Register, rscratch1);

src/hotspot/cpu/aarch64/globals_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2019, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -38,7 +38,7 @@ define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap nulls
 
 define_pd_global(bool, DelayCompilerStubsGeneration, COMPILER2_OR_JVMCI);
 
-define_pd_global(uintx, CodeCacheSegmentSize,    64);
+define_pd_global(size_t, CodeCacheSegmentSize,   64);
 define_pd_global(intx, CodeEntryAlignment,       64);
 define_pd_global(intx, OptoLoopAlignment,        16);
 
@@ -83,8 +83,6 @@ define_pd_global(intx, InlineSmallCode,          1000);
                    range,                                               \
                    constraint)                                          \
                                                                         \
-  product(bool, NearCpool, true,                                        \
-         "constant pool is close to instructions")                      \
   product(bool, UseCRC32, false,                                        \
           "Use CRC32 instructions for CRC32 computation")               \
   product(bool, UseCryptoPmullForCRC32, false,                          \
@@ -97,6 +95,8 @@ define_pd_global(intx, InlineSmallCode,          1000);
           "Use simplest and shortest implementation for array equals")  \
   product(bool, UseSIMDForBigIntegerShiftIntrinsics, true,              \
           "Use SIMD instructions for left/right shift of BigInteger")   \
+  product(bool, UseSIMDForSHA3Intrinsic, true,                          \
+          "Use SIMD SHA3 instructions for SHA3 intrinsic")              \
   product(bool, AvoidUnalignedAccesses, false,                          \
           "Avoid generating unaligned memory accesses")                 \
   product(bool, UseLSE, false,                                          \
@@ -117,7 +117,8 @@ define_pd_global(intx, InlineSmallCode,          1000);
   product(ccstr, OnSpinWaitInst, "yield", DIAGNOSTIC,                   \
           "The instruction to use to implement "                        \
           "java.lang.Thread.onSpinWait()."                              \
-          "Options: none, nop, isb, yield.")                            \
+          "Valid values are: none, nop, isb, yield, sb.")               \
+          constraint(OnSpinWaitInstNameConstraintFunc, AtParse)         \
   product(uint, OnSpinWaitInstCount, 1, DIAGNOSTIC,                     \
           "The number of OnSpinWaitInst instructions to generate."      \
           "It cannot be used with OnSpinWaitInst=none.")                \

src/hotspot/cpu/aarch64/interp_masm_aarch64.cpp

@@ -458,9 +458,10 @@ void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
 
 // remove activation
 //
-// Apply stack watermark barrier.
 // Unlock the receiver if this is a synchronized method.
 // Unlock any Java monitors from synchronized blocks.
+// Apply stack watermark barrier.
+// Notify JVMTI.
 // Remove the activation from the stack.
 //
 // If there are locked Java monitors
@@ -470,30 +471,14 @@ void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
 //       installs IllegalMonitorStateException
 //    Else
 //       no error processing
-void InterpreterMacroAssembler::remove_activation(
-        TosState state,
-        bool throw_monitor_exception,
-        bool install_monitor_exception,
-        bool notify_jvmdi) {
+void InterpreterMacroAssembler::remove_activation(TosState state,
+                                                  bool throw_monitor_exception,
+                                                  bool install_monitor_exception,
+                                                  bool notify_jvmdi) {
   // Note: Registers r3 xmm0 may be in use for the
   // result check if synchronized method
   Label unlocked, unlock, no_unlock;
 
-  // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
-  // that would normally not be safe to use. Such bad returns into unsafe territory of
-  // the stack, will call InterpreterRuntime::at_unwind.
-  Label slow_path;
-  Label fast_path;
-  safepoint_poll(slow_path, true /* at_return */, false /* acquire */, false /* in_nmethod */);
-  br(Assembler::AL, fast_path);
-  bind(slow_path);
-  push(state);
-  set_last_Java_frame(esp, rfp, (address)pc(), rscratch1);
-  super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
-  reset_last_Java_frame(true);
-  pop(state);
-  bind(fast_path);
-
   // get the value of _do_not_unlock_if_synchronized into r3
   const Address do_not_unlock_if_synchronized(rthread,
     in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
@@ -611,7 +596,24 @@ void InterpreterMacroAssembler::remove_activation(
 
   bind(no_unlock);
 
-  // jvmti support
+  JFR_ONLY(enter_jfr_critical_section();)
+
+  // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
+  // that would normally not be safe to use. Such bad returns into unsafe territory of
+  // the stack, will call InterpreterRuntime::at_unwind.
+  Label slow_path;
+  Label fast_path;
+  safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
+  br(Assembler::AL, fast_path);
+  bind(slow_path);
+  push(state);
+  set_last_Java_frame(esp, rfp, pc(), rscratch1);
+  super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
+  reset_last_Java_frame(true);
+  pop(state);
+  bind(fast_path);
+
+  // JVMTI support. Make sure the safepoint poll test is issued prior.
   if (notify_jvmdi) {
     notify_method_exit(state, NotifyJVMTI);    // preserve TOSCA
   } else {
@@ -638,6 +640,8 @@ void InterpreterMacroAssembler::remove_activation(
     cmp(rscratch2, rscratch1);
     br(Assembler::LS, no_reserved_zone_enabling);
 
+    JFR_ONLY(leave_jfr_critical_section();)
+
     call_VM_leaf(
       CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
     call_VM(noreg, CAST_FROM_FN_PTR(address,
@@ -647,10 +651,14 @@ void InterpreterMacroAssembler::remove_activation(
     bind(no_reserved_zone_enabling);
   }
 
-  // restore sender esp
-  mov(esp, rscratch2);
   // remove frame anchor
   leave();
+
+  JFR_ONLY(leave_jfr_critical_section();)
+
+  // restore sender esp
+  mov(esp, rscratch2);
+
   // If we're returning to interpreted code we will shortly be
   // adjusting SP to allow some space for ESP.  If we're returning to
   // compiled code the saved sender SP was saved in sender_sp, so this
@@ -658,6 +666,19 @@ void InterpreterMacroAssembler::remove_activation(
   andr(sp, esp, -16);
 }
 
+#if INCLUDE_JFR
+void InterpreterMacroAssembler::enter_jfr_critical_section() {
+  const Address sampling_critical_section(rthread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
+  mov(rscratch1, true);
+  strb(rscratch1, sampling_critical_section);
+}
+
+void InterpreterMacroAssembler::leave_jfr_critical_section() {
+  const Address sampling_critical_section(rthread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
+  strb(zr, sampling_critical_section);
+}
+#endif // INCLUDE_JFR
+
 // Lock object
 //
 // Args:
@@ -905,60 +926,26 @@ void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
 
 
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
-                                                      int constant,
-                                                      bool decrement) {
-  increment_mdp_data_at(mdp_in, noreg, constant, decrement);
+                                                      int constant) {
+  increment_mdp_data_at(mdp_in, noreg, constant);
 }
 
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
-                                                      Register reg,
-                                                      int constant,
-                                                      bool decrement) {
+                                                      Register index,
+                                                      int constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
-  // %%% this does 64bit counters at best it is wasting space
-  // at worst it is a rare bug when counters overflow
 
-  assert_different_registers(rscratch2, rscratch1, mdp_in, reg);
+  assert_different_registers(rscratch2, rscratch1, mdp_in, index);
 
   Address addr1(mdp_in, constant);
-  Address addr2(rscratch2, reg, Address::lsl(0));
+  Address addr2(rscratch2, index, Address::lsl(0));
   Address &addr = addr1;
-  if (reg != noreg) {
+  if (index != noreg) {
     lea(rscratch2, addr1);
     addr = addr2;
   }
 
-  if (decrement) {
-    // Decrement the register.  Set condition codes.
-    // Intel does this
-    // addptr(data, (int32_t) -DataLayout::counter_increment);
-    // If the decrement causes the counter to overflow, stay negative
-    // Label L;
-    // jcc(Assembler::negative, L);
-    // addptr(data, (int32_t) DataLayout::counter_increment);
-    // so we do this
-    ldr(rscratch1, addr);
-    subs(rscratch1, rscratch1, (unsigned)DataLayout::counter_increment);
-    Label L;
-    br(Assembler::LO, L);       // skip store if counter underflow
-    str(rscratch1, addr);
-    bind(L);
-  } else {
-    assert(DataLayout::counter_increment == 1,
-           "flow-free idiom only works with 1");
-    // Intel does this
-    // Increment the register.  Set carry flag.
-    // addptr(data, DataLayout::counter_increment);
-    // If the increment causes the counter to overflow, pull back by 1.
-    // sbbptr(data, (int32_t)0);
-    // so we do this
-    ldr(rscratch1, addr);
-    adds(rscratch1, rscratch1, DataLayout::counter_increment);
-    Label L;
-    br(Assembler::CS, L);       // skip store if counter overflow
-    str(rscratch1, addr);
-    bind(L);
-  }
+  increment(addr, DataLayout::counter_increment);
 }
 
 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
@@ -1029,31 +1016,16 @@ void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
 }
 
 
-void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
-                                                     Register bumped_count) {
+void InterpreterMacroAssembler::profile_taken_branch(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
 
     // If no method data exists, go to profile_continue.
-    // Otherwise, assign to mdp
     test_method_data_pointer(mdp, profile_continue);
 
     // We are taking a branch.  Increment the taken count.
-    // We inline increment_mdp_data_at to return bumped_count in a register
-    //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
-    Address data(mdp, in_bytes(JumpData::taken_offset()));
-    ldr(bumped_count, data);
-    assert(DataLayout::counter_increment == 1,
-            "flow-free idiom only works with 1");
-    // Intel does this to catch overflow
-    // addptr(bumped_count, DataLayout::counter_increment);
-    // sbbptr(bumped_count, 0);
-    // so we do this
-    adds(bumped_count, bumped_count, DataLayout::counter_increment);
-    Label L;
-    br(Assembler::CS, L);       // skip store if counter overflow
-    str(bumped_count, data);
-    bind(L);
+    increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
+
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
     bind(profile_continue);
@@ -1068,7 +1040,7 @@ void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
 
-    // We are taking a branch.  Increment the not taken count.
+    // We are not taking a branch.  Increment the not taken count.
     increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
 
     // The method data pointer needs to be updated to correspond to

src/hotspot/cpu/aarch64/interp_masm_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -247,11 +247,8 @@ class InterpreterMacroAssembler: public MacroAssembler {
   void verify_method_data_pointer();
 
   void set_mdp_data_at(Register mdp_in, int constant, Register value);
-  void increment_mdp_data_at(Address data, bool decrement = false);
-  void increment_mdp_data_at(Register mdp_in, int constant,
-                             bool decrement = false);
-  void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
-                             bool decrement = false);
+  void increment_mdp_data_at(Register mdp_in, int constant);
+  void increment_mdp_data_at(Register mdp_in, Register index, int constant);
   void increment_mask_and_jump(Address counter_addr,
                                int increment, Address mask,
                                Register scratch, Register scratch2,
@@ -279,7 +276,7 @@ class InterpreterMacroAssembler: public MacroAssembler {
   // narrow int return value
   void narrow(Register result);
 
-  void profile_taken_branch(Register mdp, Register bumped_count);
+  void profile_taken_branch(Register mdp);
   void profile_not_taken_branch(Register mdp);
   void profile_call(Register mdp);
   void profile_final_call(Register mdp);
@@ -310,6 +307,9 @@ class InterpreterMacroAssembler: public MacroAssembler {
   void notify_method_entry();
   void notify_method_exit(TosState state, NotifyMethodExitMode mode);
 
+  JFR_ONLY(void enter_jfr_critical_section();)
+  JFR_ONLY(void leave_jfr_critical_section();)
+
   virtual void _call_Unimplemented(address call_site) {
     save_bcp();
     set_last_Java_frame(esp, rfp, (address) pc(), rscratch1);

src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp

@@ -553,13 +553,8 @@ address MacroAssembler::target_addr_for_insn_or_null(address insn_addr, unsigned
   return MacroAssembler::target_addr_for_insn(insn_addr, insn);
 }
 
-void MacroAssembler::safepoint_poll(Label& slow_path, bool at_return, bool acquire, bool in_nmethod, Register tmp) {
-  if (acquire) {
-    lea(tmp, Address(rthread, JavaThread::polling_word_offset()));
-    ldar(tmp, tmp);
-  } else {
-    ldr(tmp, Address(rthread, JavaThread::polling_word_offset()));
-  }
+void MacroAssembler::safepoint_poll(Label& slow_path, bool at_return, bool in_nmethod, Register tmp) {
+  ldr(tmp, Address(rthread, JavaThread::polling_word_offset()));
   if (at_return) {
     // Note that when in_nmethod is set, the stack pointer is incremented before the poll. Therefore,
     // we may safely use the sp instead to perform the stack watermark check.
@@ -989,11 +984,19 @@ void MacroAssembler::emit_static_call_stub() {
   mov_metadata(rmethod, nullptr);
 
   // Jump to the entry point of the c2i stub.
-  movptr(rscratch1, 0);
-  br(rscratch1);
+  if (codestub_branch_needs_far_jump()) {
+    movptr(rscratch1, 0);
+    br(rscratch1);
+  } else {
+    b(pc());
+  }
 }
 
 int MacroAssembler::static_call_stub_size() {
+  if (!codestub_branch_needs_far_jump()) {
+    // isb; movk; movz; movz; b
+    return 5 * NativeInstruction::instruction_size;
+  }
   // isb; movk; movz; movz; movk; movz; movz; br
   return 8 * NativeInstruction::instruction_size;
 }
@@ -5340,7 +5343,41 @@ bool MacroAssembler::set_klass_decode_mode(address base, int shift, const size_t
   return _klass_decode_mode != KlassDecodeNone;
 }
 
+static Register pick_different_tmp(Register dst, Register src) {
+  auto tmps = RegSet::of(r0, r1, r2) - RegSet::of(src, dst);
+  return *tmps.begin();
+}
+
+void MacroAssembler::encode_klass_not_null_for_aot(Register dst, Register src) {
+  // we have to load the klass base from the AOT constants area but
+  // not the shift because it is not allowed to change
+  int shift = CompressedKlassPointers::shift();
+  assert(shift >= 0 && shift <= CompressedKlassPointers::max_shift(), "unexpected compressed klass shift!");
+  if (dst != src) {
+    // we can load the base into dst, subtract it formthe src and shift down
+    lea(dst, ExternalAddress(CompressedKlassPointers::base_addr()));
+    ldr(dst, dst);
+    sub(dst, src, dst);
+    lsr(dst, dst, shift);
+  } else {
+    // we need an extra register in order to load the coop base
+    Register tmp = pick_different_tmp(dst, src);
+    RegSet regs = RegSet::of(tmp);
+    push(regs, sp);
+    lea(tmp, ExternalAddress(CompressedKlassPointers::base_addr()));
+    ldr(tmp, tmp);
+    sub(dst, src, tmp);
+    lsr(dst, dst, shift);
+    pop(regs, sp);
+  }
+}
+
 void MacroAssembler::encode_klass_not_null(Register dst, Register src) {
+  if (AOTCodeCache::is_on_for_dump()) {
+    encode_klass_not_null_for_aot(dst, src);
+    return;
+  }
+
   switch (klass_decode_mode()) {
   case KlassDecodeZero:
     if (CompressedKlassPointers::shift() != 0) {
@@ -5377,9 +5414,36 @@ void MacroAssembler::encode_klass_not_null(Register r) {
   encode_klass_not_null(r, r);
 }
 
+void MacroAssembler::decode_klass_not_null_for_aot(Register dst, Register src) {
+  // we have to load the klass base from the AOT constants area but
+  // not the shift because it is not allowed to change
+  int shift = CompressedKlassPointers::shift();
+  assert(shift >= 0 && shift <= CompressedKlassPointers::max_shift(), "unexpected compressed klass shift!");
+  if (dst != src) {
+    // we can load the base into dst then add the offset with a suitable shift
+    lea(dst, ExternalAddress(CompressedKlassPointers::base_addr()));
+    ldr(dst, dst);
+    add(dst, dst, src, LSL,  shift);
+  } else {
+    // we need an extra register in order to load the coop base
+    Register tmp = pick_different_tmp(dst, src);
+    RegSet regs = RegSet::of(tmp);
+    push(regs, sp);
+    lea(tmp, ExternalAddress(CompressedKlassPointers::base_addr()));
+    ldr(tmp, tmp);
+    add(dst, tmp,  src, LSL,  shift);
+    pop(regs, sp);
+  }
+}
+
 void  MacroAssembler::decode_klass_not_null(Register dst, Register src) {
   assert (UseCompressedClassPointers, "should only be used for compressed headers");
 
+  if (AOTCodeCache::is_on_for_dump()) {
+    decode_klass_not_null_for_aot(dst, src);
+    return;
+  }
+
   switch (klass_decode_mode()) {
   case KlassDecodeZero:
     if (CompressedKlassPointers::shift() != 0) {
@@ -6654,7 +6718,7 @@ void MacroAssembler::get_thread(Register dst) {
   protect_return_address();
   push(saved_regs, sp);
 
-  mov(lr, CAST_FROM_FN_PTR(address, JavaThread::aarch64_get_thread_helper));
+  mov(lr, ExternalAddress(CAST_FROM_FN_PTR(address, JavaThread::aarch64_get_thread_helper)));
   blr(lr);
   if (dst != c_rarg0) {
     mov(dst, c_rarg0);
@@ -6739,6 +6803,7 @@ void MacroAssembler::verify_cross_modify_fence_not_required() {
 #endif
 
 void MacroAssembler::spin_wait() {
+  block_comment("spin_wait {");
   for (int i = 0; i < VM_Version::spin_wait_desc().inst_count(); ++i) {
     switch (VM_Version::spin_wait_desc().inst()) {
       case SpinWait::NOP:
@@ -6750,10 +6815,15 @@ void MacroAssembler::spin_wait() {
       case SpinWait::YIELD:
         yield();
         break;
+      case SpinWait::SB:
+        assert(VM_Version::supports_sb(), "current CPU does not support SB instruction");
+        sb();
+        break;
       default:
         ShouldNotReachHere();
     }
   }
+  block_comment("}");
 }
 
 // Stack frame creation/removal

src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp

@@ -120,7 +120,7 @@ class MacroAssembler: public Assembler {
  virtual void check_and_handle_popframe(Register java_thread);
  virtual void check_and_handle_earlyret(Register java_thread);
 
-  void safepoint_poll(Label& slow_path, bool at_return, bool acquire, bool in_nmethod, Register tmp = rscratch1);
+  void safepoint_poll(Label& slow_path, bool at_return, bool in_nmethod, Register tmp = rscratch1);
   void rt_call(address dest, Register tmp = rscratch1);
 
   // Load Effective Address
@@ -129,16 +129,21 @@ class MacroAssembler: public Assembler {
     a.lea(this, r);
   }
 
+  // Whether materializing the given address for a LDR/STR requires an
+  // additional lea instruction.
+  static bool legitimize_address_requires_lea(const Address &a, int size) {
+    return a.getMode() == Address::base_plus_offset &&
+           !Address::offset_ok_for_immed(a.offset(), exact_log2(size));
+  }
+
   /* Sometimes we get misaligned loads and stores, usually from Unsafe
      accesses, and these can exceed the offset range. */
   Address legitimize_address(const Address &a, int size, Register scratch) {
-    if (a.getMode() == Address::base_plus_offset) {
-      if (! Address::offset_ok_for_immed(a.offset(), exact_log2(size))) {
-        block_comment("legitimize_address {");
-        lea(scratch, a);
-        block_comment("} legitimize_address");
-        return Address(scratch);
-      }
+    if (legitimize_address_requires_lea(a, size)) {
+      block_comment("legitimize_address {");
+      lea(scratch, a);
+      block_comment("} legitimize_address");
+      return Address(scratch);
     }
     return a;
   }
@@ -323,6 +328,27 @@ class MacroAssembler: public Assembler {
     extr(Rd, Rn, Rn, imm);
   }
 
+  inline void rolw(Register Rd, Register Rn, unsigned imm) {
+    extrw(Rd, Rn, Rn, (32 - imm));
+  }
+
+  inline void rol(Register Rd, Register Rn, unsigned imm) {
+    extr(Rd, Rn, Rn, (64 - imm));
+  }
+
+  using Assembler::rax1;
+  using Assembler::eor3;
+
+  inline void rax1(Register Rd, Register Rn, Register Rm) {
+    eor(Rd, Rn, Rm, ROR, 63); // Rd = Rn ^ rol(Rm, 1)
+  }
+
+  inline void eor3(Register Rd, Register Rn, Register Rm, Register Rk) {
+    assert(Rd != Rn, "Use tmp register");
+    eor(Rd, Rm, Rk);
+    eor(Rd, Rd, Rn);
+  }
+
   inline void sxtbw(Register Rd, Register Rn) {
     sbfmw(Rd, Rn, 0, 7);
   }
@@ -935,6 +961,8 @@ public:
 
   void set_narrow_oop(Register dst, jobject obj);
 
+  void decode_klass_not_null_for_aot(Register dst, Register src);
+  void encode_klass_not_null_for_aot(Register dst, Register src);
   void encode_klass_not_null(Register r);
   void decode_klass_not_null(Register r);
   void encode_klass_not_null(Register dst, Register src);

src/hotspot/cpu/aarch64/macroAssembler_aarch64_trig.cpp

@@ -543,7 +543,7 @@ void MacroAssembler::generate__ieee754_rem_pio2(address npio2_hw,
 //  }
 //
 //  /* compute n */
-//  z  = scalbnA(z,q0);           /* actual value of z */
+//  z  = scalbn(z,q0);                    /* actual value of z */
 //  z -= 8.0*floor(z*0.125);              /* trim off integer >= 8 */
 //  n  = (int) z;
 //  z -= (double)n;
@@ -576,7 +576,7 @@ void MacroAssembler::generate__ieee754_rem_pio2(address npio2_hw,
 //    }
 //    if(ih==2) {
 //      z = one - z;
-//      if(carry!=0) z -= scalbnA(one,q0);
+//      if(carry!=0) z -= scalbn(one,q0);
 //    }
 //  }
 //
@@ -602,7 +602,7 @@ void MacroAssembler::generate__ieee754_rem_pio2(address npio2_hw,
 //    jz -= 1; q0 -= 24;
 //    while(iq[jz]==0) { jz--; q0-=24;}
 //  } else { /* break z into 24-bit if necessary */
-//    z = scalbnA(z,-q0);
+//    z = scalbn(z,-q0);
 //    if(z>=two24B) {
 //      fw = (double)((int)(twon24*z));
 //      iq[jz] = (int)(z-two24B*fw);
@@ -612,7 +612,7 @@ void MacroAssembler::generate__ieee754_rem_pio2(address npio2_hw,
 //  }
 //
 //  /* convert integer "bit" chunk to floating-point value */
-//  fw = scalbnA(one,q0);
+//  fw = scalbn(one,q0);
 //  for(i=jz;i>=0;i--) {
 //    q[i] = fw*(double)iq[i]; fw*=twon24;
 //  }
@@ -925,7 +925,7 @@ void MacroAssembler::generate__kernel_rem_pio2(address two_over_pi, address pio2
           fmovd(v25, 1.0);
           fsubd(v18, v25, v18);                            // z = one - z;
           cbzw(rscratch2, IH_HANDLED);
-          fsubd(v18, v18, v30);                            // z -= scalbnA(one,q0);
+          fsubd(v18, v18, v30);                            // z -= scalbn(one,q0);
         }
     }
     bind(IH_HANDLED);
@@ -1026,7 +1026,7 @@ void MacroAssembler::generate__kernel_rem_pio2(address two_over_pi, address pio2
       bind(Z_ZERO_CHECK_DONE);
         // convert integer "bit" chunk to floating-point value
         // v17 = twon24
-        // update v30, which was scalbnA(1.0, <old q0>);
+        // update v30, which was scalbn(1.0, <old q0>);
         addw(tmp2, rscratch1, 1023); // biased exponent
         lsl(tmp2, tmp2, 52); // put at correct position
         mov(i, jz);

src/hotspot/cpu/aarch64/nativeInst_aarch64.cpp

@@ -212,11 +212,6 @@ void NativeMovRegMem::verify() {
 
 void NativeJump::verify() { ; }
 
-
-void NativeJump::check_verified_entry_alignment(address entry, address verified_entry) {
-}
-
-
 address NativeJump::jump_destination() const          {
   address dest = MacroAssembler::target_addr_for_insn_or_null(instruction_address());
 
@@ -345,10 +340,6 @@ bool NativeInstruction::is_movk() {
   return Instruction_aarch64::extract(int_at(0), 30, 23) == 0b11100101;
 }
 
-bool NativeInstruction::is_sigill_not_entrant() {
-  return uint_at(0) == 0xd4bbd5a1; // dcps1 #0xdead
-}
-
 void NativeIllegalInstruction::insert(address code_pos) {
   *(juint*)code_pos = 0xd4bbd5a1; // dcps1 #0xdead
 }
@@ -359,45 +350,8 @@ bool NativeInstruction::is_stop() {
 
 //-------------------------------------------------------------------
 
-// MT-safe inserting of a jump over a jump or a nop (used by
-// nmethod::make_not_entrant)
-
-void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) {
-
-  assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "expected fixed destination of patch");
-  assert(nativeInstruction_at(verified_entry)->is_jump_or_nop()
-         || nativeInstruction_at(verified_entry)->is_sigill_not_entrant(),
-         "Aarch64 cannot replace non-jump with jump");
-
-  // Patch this nmethod atomically.
-  if (Assembler::reachable_from_branch_at(verified_entry, dest)) {
-    ptrdiff_t disp = dest - verified_entry;
-    guarantee(disp < 1 << 27 && disp > - (1 << 27), "branch overflow");
-
-    unsigned int insn = (0b000101 << 26) | ((disp >> 2) & 0x3ffffff);
-    *(unsigned int*)verified_entry = insn;
-  } else {
-    // We use an illegal instruction for marking a method as not_entrant.
-    NativeIllegalInstruction::insert(verified_entry);
-  }
-
-  ICache::invalidate_range(verified_entry, instruction_size);
-}
-
 void NativeGeneralJump::verify() {  }
 
-void NativeGeneralJump::insert_unconditional(address code_pos, address entry) {
-  NativeGeneralJump* n_jump = (NativeGeneralJump*)code_pos;
-
-  CodeBuffer cb(code_pos, instruction_size);
-  MacroAssembler a(&cb);
-
-  a.movptr(rscratch1, (uintptr_t)entry);
-  a.br(rscratch1);
-
-  ICache::invalidate_range(code_pos, instruction_size);
-}
-
 // MT-safe patching of a long jump instruction.
 void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
   ShouldNotCallThis();

src/hotspot/cpu/aarch64/nativeInst_aarch64.hpp

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2014, 2108, Red Hat Inc. All rights reserved.
+ * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2025, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -83,7 +83,6 @@ public:
   bool is_safepoint_poll();
   bool is_movz();
   bool is_movk();
-  bool is_sigill_not_entrant();
   bool is_stop();
 
 protected:
@@ -360,9 +359,6 @@ public:
 
   // Insertion of native jump instruction
   static void insert(address code_pos, address entry);
-  // MT-safe insertion of native jump at verified method entry
-  static void check_verified_entry_alignment(address entry, address verified_entry);
-  static void patch_verified_entry(address entry, address verified_entry, address dest);
 };
 
 inline NativeJump* nativeJump_at(address address) {
@@ -383,7 +379,6 @@ public:
   address jump_destination() const;
   void set_jump_destination(address dest);
 
-  static void insert_unconditional(address code_pos, address entry);
   static void replace_mt_safe(address instr_addr, address code_buffer);
   static void verify();
 };

src/hotspot/cpu/aarch64/runtime_aarch64.cpp

@@ -26,6 +26,7 @@
 #ifdef COMPILER2
 #include "asm/macroAssembler.hpp"
 #include "asm/macroAssembler.inline.hpp"
+#include "code/aotCodeCache.hpp"
 #include "code/vmreg.hpp"
 #include "interpreter/interpreter.hpp"
 #include "opto/runtime.hpp"
@@ -60,10 +61,15 @@ class SimpleRuntimeFrame {
 
 //------------------------------generate_uncommon_trap_blob--------------------
 UncommonTrapBlob* OptoRuntime::generate_uncommon_trap_blob() {
+  const char* name = OptoRuntime::stub_name(StubId::c2_uncommon_trap_id);
+  CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::C2Blob, BlobId::c2_uncommon_trap_id);
+  if (blob != nullptr) {
+    return blob->as_uncommon_trap_blob();
+  }
+
   // Allocate space for the code
   ResourceMark rm;
   // Setup code generation tools
-  const char* name = OptoRuntime::stub_name(OptoStubId::uncommon_trap_id);
   CodeBuffer buffer(name, 2048, 1024);
   if (buffer.blob() == nullptr) {
     return nullptr;
@@ -246,8 +252,10 @@ UncommonTrapBlob* OptoRuntime::generate_uncommon_trap_blob() {
   // Make sure all code is generated
   masm->flush();
 
-  return UncommonTrapBlob::create(&buffer, oop_maps,
-                                                 SimpleRuntimeFrame::framesize >> 1);
+  UncommonTrapBlob *ut_blob = UncommonTrapBlob::create(&buffer, oop_maps,
+                                                       SimpleRuntimeFrame::framesize >> 1);
+  AOTCodeCache::store_code_blob(*ut_blob, AOTCodeEntry::C2Blob, BlobId::c2_uncommon_trap_id);
+  return ut_blob;
 }
 
 //------------------------------generate_exception_blob---------------------------
@@ -283,10 +291,15 @@ ExceptionBlob* OptoRuntime::generate_exception_blob() {
 
   assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned");
 
+  const char* name = OptoRuntime::stub_name(StubId::c2_exception_id);
+  CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::C2Blob, (uint)BlobId::c2_exception_id, name);
+  if (blob != nullptr) {
+    return blob->as_exception_blob();
+  }
+
   // Allocate space for the code
   ResourceMark rm;
   // Setup code generation tools
-  const char* name = OptoRuntime::stub_name(OptoStubId::exception_id);
   CodeBuffer buffer(name, 2048, 1024);
   if (buffer.blob() == nullptr) {
     return nullptr;
@@ -384,7 +397,9 @@ ExceptionBlob* OptoRuntime::generate_exception_blob() {
   masm->flush();
 
   // Set exception blob
-  return ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1);
+  ExceptionBlob* ex_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1);
+  AOTCodeCache::store_code_blob(*ex_blob, AOTCodeEntry::C2Blob, BlobId::c2_exception_id);
+  return ex_blob;
 }
 #endif // COMPILER2
 

src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp

@@ -26,6 +26,7 @@
 
 #include "asm/macroAssembler.hpp"
 #include "asm/macroAssembler.inline.hpp"
+#include "code/aotCodeCache.hpp"
 #include "code/codeCache.hpp"
 #include "code/compiledIC.hpp"
 #include "code/debugInfoRec.hpp"
@@ -1876,7 +1877,7 @@ nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm,
   // Check for safepoint operation in progress and/or pending suspend requests.
   {
     // No need for acquire as Java threads always disarm themselves.
-    __ safepoint_poll(safepoint_in_progress, true /* at_return */, false /* acquire */, false /* in_nmethod */);
+    __ safepoint_poll(safepoint_in_progress, true /* at_return */, false /* in_nmethod */);
     __ ldrw(rscratch1, Address(rthread, JavaThread::suspend_flags_offset()));
     __ cbnzw(rscratch1, safepoint_in_progress);
     __ bind(safepoint_in_progress_done);
@@ -1984,6 +1985,23 @@ nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm,
 
   __ leave();
 
+  #if INCLUDE_JFR
+  // We need to do a poll test after unwind in case the sampler
+  // managed to sample the native frame after returning to Java.
+  Label L_return;
+  __ ldr(rscratch1, Address(rthread, JavaThread::polling_word_offset()));
+  address poll_test_pc = __ pc();
+  __ relocate(relocInfo::poll_return_type);
+  __ tbz(rscratch1, log2i_exact(SafepointMechanism::poll_bit()), L_return);
+  assert(SharedRuntime::polling_page_return_handler_blob() != nullptr,
+    "polling page return stub not created yet");
+  address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
+  __ adr(rscratch1, InternalAddress(poll_test_pc));
+  __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
+  __ far_jump(RuntimeAddress(stub));
+  __ bind(L_return);
+#endif // INCLUDE_JFR
+
   // Any exception pending?
   __ ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
   __ cbnz(rscratch1, exception_pending);
@@ -2183,7 +2201,13 @@ void SharedRuntime::generate_deopt_blob() {
     pad += 512; // Increase the buffer size when compiling for JVMCI
   }
 #endif
-  const char* name = SharedRuntime::stub_name(SharedStubId::deopt_id);
+  const char* name = SharedRuntime::stub_name(StubId::shared_deopt_id);
+  CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::SharedBlob, BlobId::shared_deopt_id);
+  if (blob != nullptr) {
+    _deopt_blob = blob->as_deoptimization_blob();
+    return;
+  }
+
   CodeBuffer buffer(name, 2048+pad, 1024);
   MacroAssembler* masm = new MacroAssembler(&buffer);
   int frame_size_in_words;
@@ -2547,6 +2571,8 @@ void SharedRuntime::generate_deopt_blob() {
     _deopt_blob->set_implicit_exception_uncommon_trap_offset(implicit_exception_uncommon_trap_offset);
   }
 #endif
+
+  AOTCodeCache::store_code_blob(*_deopt_blob, AOTCodeEntry::SharedBlob, BlobId::shared_deopt_id);
 }
 
 // Number of stack slots between incoming argument block and the start of
@@ -2572,23 +2598,27 @@ VMReg SharedRuntime::thread_register() {
 // Generate a special Compile2Runtime blob that saves all registers,
 // and setup oopmap.
 //
-SafepointBlob* SharedRuntime::generate_handler_blob(SharedStubId id, address call_ptr) {
+SafepointBlob* SharedRuntime::generate_handler_blob(StubId id, address call_ptr) {
   assert(is_polling_page_id(id), "expected a polling page stub id");
 
+  // Allocate space for the code.  Setup code generation tools.
+  const char* name = SharedRuntime::stub_name(id);
+  CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::SharedBlob, StubInfo::blob(id));
+  if (blob != nullptr) {
+    return blob->as_safepoint_blob();
+  }
+
   ResourceMark rm;
   OopMapSet *oop_maps = new OopMapSet();
   OopMap* map;
-
-  // Allocate space for the code.  Setup code generation tools.
-  const char* name = SharedRuntime::stub_name(id);
   CodeBuffer buffer(name, 2048, 1024);
   MacroAssembler* masm = new MacroAssembler(&buffer);
 
   address start   = __ pc();
   address call_pc = nullptr;
   int frame_size_in_words;
-  bool cause_return = (id == SharedStubId::polling_page_return_handler_id);
-  RegisterSaver reg_save(id == SharedStubId::polling_page_vectors_safepoint_handler_id /* save_vectors */);
+  bool cause_return = (id == StubId::shared_polling_page_return_handler_id);
+  RegisterSaver reg_save(id == StubId::shared_polling_page_vectors_safepoint_handler_id /* save_vectors */);
 
   // When the signal occurred, the LR was either signed and stored on the stack (in which
   // case it will be restored from the stack before being used) or unsigned and not stored
@@ -2689,7 +2719,10 @@ SafepointBlob* SharedRuntime::generate_handler_blob(SharedStubId id, address cal
   masm->flush();
 
   // Fill-out other meta info
-  return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words);
+  SafepointBlob* sp_blob = SafepointBlob::create(&buffer, oop_maps, frame_size_in_words);
+
+  AOTCodeCache::store_code_blob(*sp_blob, AOTCodeEntry::SharedBlob, StubInfo::blob(id));
+  return sp_blob;
 }
 
 //
@@ -2700,14 +2733,18 @@ SafepointBlob* SharedRuntime::generate_handler_blob(SharedStubId id, address cal
 // but since this is generic code we don't know what they are and the caller
 // must do any gc of the args.
 //
-RuntimeStub* SharedRuntime::generate_resolve_blob(SharedStubId id, address destination) {
+RuntimeStub* SharedRuntime::generate_resolve_blob(StubId id, address destination) {
   assert (StubRoutines::forward_exception_entry() != nullptr, "must be generated before");
   assert(is_resolve_id(id), "expected a resolve stub id");
 
+  const char* name = SharedRuntime::stub_name(id);
+  CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::SharedBlob, StubInfo::blob(id));
+  if (blob != nullptr) {
+    return blob->as_runtime_stub();
+  }
+
   // allocate space for the code
   ResourceMark rm;
-
-  const char* name = SharedRuntime::stub_name(id);
   CodeBuffer buffer(name, 1000, 512);
   MacroAssembler* masm                = new MacroAssembler(&buffer);
 
@@ -2780,7 +2817,10 @@ RuntimeStub* SharedRuntime::generate_resolve_blob(SharedStubId id, address desti
 
   // return the  blob
   // frame_size_words or bytes??
-  return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true);
+  RuntimeStub* rs_blob = RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true);
+
+  AOTCodeCache::store_code_blob(*rs_blob, AOTCodeEntry::SharedBlob, StubInfo::blob(id));
+  return rs_blob;
 }
 
 // Continuation point for throwing of implicit exceptions that are
@@ -2799,7 +2839,7 @@ RuntimeStub* SharedRuntime::generate_resolve_blob(SharedStubId id, address desti
 // otherwise assume that stack unwinding will be initiated, so
 // caller saved registers were assumed volatile in the compiler.
 
-RuntimeStub* SharedRuntime::generate_throw_exception(SharedStubId id, address runtime_entry) {
+RuntimeStub* SharedRuntime::generate_throw_exception(StubId id, address runtime_entry) {
   assert(is_throw_id(id), "expected a throw stub id");
 
   const char* name = SharedRuntime::stub_name(id);
@@ -2820,10 +2860,15 @@ RuntimeStub* SharedRuntime::generate_throw_exception(SharedStubId id, address ru
   int insts_size = 512;
   int locs_size  = 64;
 
-  ResourceMark rm;
   const char* timer_msg = "SharedRuntime generate_throw_exception";
   TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
 
+  CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::SharedBlob, StubInfo::blob(id));
+  if (blob != nullptr) {
+    return blob->as_runtime_stub();
+  }
+
+  ResourceMark rm;
   CodeBuffer code(name, insts_size, locs_size);
   OopMapSet* oop_maps  = new OopMapSet();
   MacroAssembler* masm = new MacroAssembler(&code);
@@ -2850,7 +2895,7 @@ RuntimeStub* SharedRuntime::generate_throw_exception(SharedStubId id, address ru
 
   __ mov(c_rarg0, rthread);
   BLOCK_COMMENT("call runtime_entry");
-  __ mov(rscratch1, runtime_entry);
+  __ lea(rscratch1, RuntimeAddress(runtime_entry));
   __ blr(rscratch1);
 
   // Generate oop map
@@ -2883,6 +2928,8 @@ RuntimeStub* SharedRuntime::generate_throw_exception(SharedStubId id, address ru
                                   frame_complete,
                                   (framesize >> (LogBytesPerWord - LogBytesPerInt)),
                                   oop_maps, false);
+  AOTCodeCache::store_code_blob(*stub, AOTCodeEntry::SharedBlob, StubInfo::blob(id));
+
   return stub;
 }
 
@@ -2912,7 +2959,7 @@ RuntimeStub* SharedRuntime::generate_jfr_write_checkpoint() {
 
   int insts_size = 1024;
   int locs_size = 64;
-  const char* name = SharedRuntime::stub_name(SharedStubId::jfr_write_checkpoint_id);
+  const char* name = SharedRuntime::stub_name(StubId::shared_jfr_write_checkpoint_id);
   CodeBuffer code(name, insts_size, locs_size);
   OopMapSet* oop_maps = new OopMapSet();
   MacroAssembler* masm = new MacroAssembler(&code);
@@ -2951,7 +2998,7 @@ RuntimeStub* SharedRuntime::generate_jfr_return_lease() {
   int insts_size = 1024;
   int locs_size = 64;
 
-  const char* name = SharedRuntime::stub_name(SharedStubId::jfr_return_lease_id);
+  const char* name = SharedRuntime::stub_name(StubId::shared_jfr_return_lease_id);
   CodeBuffer code(name, insts_size, locs_size);
   OopMapSet* oop_maps = new OopMapSet();
   MacroAssembler* masm = new MacroAssembler(&code);

src/hotspot/cpu/aarch64/spin_wait_aarch64.cpp

@@ -19,42 +19,34 @@
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
- *
  */
 
-package sun.jvm.hotspot.runtime;
+#include "spin_wait_aarch64.hpp"
+#include "utilities/debug.hpp"
 
-import sun.jvm.hotspot.types.TypeDataBase;
+#include <string.h>
 
-
-/** Encapsulates the LockingMode enum in globalDefinitions.hpp in
-    the VM. */
-
-public class LockingMode {
-  private static int monitor;
-  private static int legacy;
-  private static int lightweight;
-
-  static {
-    VM.registerVMInitializedObserver(
-        (o, d) -> initialize(VM.getVM().getTypeDataBase()));
-  }
-
-  private static synchronized void initialize(TypeDataBase db) {
-    monitor     = db.lookupIntConstant("LM_MONITOR").intValue();
-    legacy      = db.lookupIntConstant("LM_LEGACY").intValue();
-    lightweight = db.lookupIntConstant("LM_LIGHTWEIGHT").intValue();
-  }
-
-  public static int getMonitor() {
-    return monitor;
-  }
-
-  public static int getLegacy() {
-    return legacy;
-  }
-
-  public static int getLightweight() {
-    return lightweight;
-  }
+bool SpinWait::supports(const char *name) {
+  return name != nullptr &&
+         (strcmp(name, "nop")   == 0 ||
+          strcmp(name, "isb")   == 0 ||
+          strcmp(name, "yield") == 0 ||
+          strcmp(name, "sb")    == 0 ||
+          strcmp(name, "none")  == 0);
+}
+
+SpinWait::Inst SpinWait::from_name(const char* name) {
+  assert(supports(name), "checked by OnSpinWaitInstNameConstraintFunc");
+
+  if (strcmp(name, "nop") == 0) {
+    return SpinWait::NOP;
+  } else if (strcmp(name, "isb") == 0) {
+    return SpinWait::ISB;
+  } else if (strcmp(name, "yield") == 0) {
+    return SpinWait::YIELD;
+  } else if (strcmp(name, "sb") == 0) {
+    return SpinWait::SB;
+  }
+
+  return SpinWait::NONE;
 }

src/hotspot/cpu/aarch64/spin_wait_aarch64.hpp

@@ -19,7 +19,6 @@
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
- *
  */
 
 #ifndef CPU_AARCH64_SPIN_WAIT_AARCH64_HPP
@@ -31,18 +30,24 @@ public:
     NONE = -1,
     NOP,
     ISB,
-    YIELD
+    YIELD,
+    SB
   };
 
 private:
   Inst _inst;
   int _count;
 
+  Inst from_name(const char *name);
+
 public:
-  SpinWait(Inst inst = NONE, int count = 0) : _inst(inst), _count(count) {}
+  SpinWait(Inst inst = NONE, int count = 0) : _inst(inst), _count(inst == NONE ? 0 : count) {}
+  SpinWait(const char *name, int count) : SpinWait(from_name(name), count) {}
 
   Inst inst() const { return _inst; }
   int inst_count() const { return _count; }
+
+  static bool supports(const char *name);
 };
 
 #endif // CPU_AARCH64_SPIN_WAIT_AARCH64_HPP

src/hotspot/cpu/aarch64/stubDeclarations_aarch64.hpp

@@ -26,6 +26,13 @@
 #ifndef CPU_AARCH64_STUBDECLARATIONS_HPP
 #define CPU_AARCH64_STUBDECLARATIONS_HPP
 
+#define STUBGEN_PREUNIVERSE_BLOBS_ARCH_DO(do_stub,                      \
+                                          do_arch_blob,                 \
+                                          do_arch_entry,                \
+                                          do_arch_entry_init)           \
+  do_arch_blob(preuniverse, 0)                                          \
+
+
 #define STUBGEN_INITIAL_BLOBS_ARCH_DO(do_stub,                          \
                                       do_arch_blob,                     \
                                       do_arch_entry,                    \

src/hotspot/cpu/aarch64/templateInterpreterGenerator_aarch64.cpp

@@ -865,6 +865,10 @@ void TemplateInterpreterGenerator::lock_method() {
 //      rcpool: cp cache
 //      stack_pointer: previous sp
 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
+  // Save ConstMethod* in r5_const_method for later use to avoid loading multiple times
+  Register r5_const_method = r5;
+  __ ldr(r5_const_method, Address(rmethod, Method::const_offset()));
+
   // initialize fixed part of activation frame
   if (native_call) {
     __ sub(esp, sp, 14 *  wordSize);
@@ -875,8 +879,7 @@ void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
     __ stp(zr, zr, Address(sp, 12 * wordSize));
   } else {
     __ sub(esp, sp, 12 *  wordSize);
-    __ ldr(rscratch1, Address(rmethod, Method::const_offset()));    // get ConstMethod
-    __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase
+    __ add(rbcp, r5_const_method, in_bytes(ConstMethod::codes_offset())); // get codebase
     __ mov(rscratch1, frame::interpreter_frame_initial_sp_offset);
     __ stp(rscratch1, rbcp, Address(__ pre(sp, -12 * wordSize)));
   }
@@ -896,9 +899,10 @@ void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
   __ stp(rfp, lr, Address(sp, 10 * wordSize));
   __ lea(rfp, Address(sp, 10 * wordSize));
 
-  __ ldr(rcpool, Address(rmethod, Method::const_offset()));
-  __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset()));
-  __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset()));
+  // Save ConstantPool* in r11_constants for later use to avoid loading multiple times
+  Register r11_constants = r11;
+  __ ldr(r11_constants, Address(r5_const_method, ConstMethod::constants_offset()));
+  __ ldr(rcpool, Address(r11_constants, ConstantPool::cache_offset()));
   __ sub(rscratch1, rlocals, rfp);
   __ lsr(rscratch1, rscratch1, Interpreter::logStackElementSize);   // rscratch1 = rlocals - fp();
   // Store relativized rlocals, see frame::interpreter_frame_locals().
@@ -908,11 +912,12 @@ void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
   // leave last_sp as null
   __ stp(zr, r19_sender_sp, Address(sp, 8 * wordSize));
 
-  // Get mirror
-  __ load_mirror(r10, rmethod, r5, rscratch2);
+  // Get mirror. Resolve ConstantPool* -> InstanceKlass* -> Java mirror.
+  __ ldr(r10, Address(r11_constants, ConstantPool::pool_holder_offset()));
+  __ ldr(r10, Address(r10, in_bytes(Klass::java_mirror_offset())));
+  __ resolve_oop_handle(r10, rscratch1, rscratch2);
   if (! native_call) {
-    __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
-    __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
+    __ ldrh(rscratch1, Address(r5_const_method, ConstMethod::max_stack_offset()));
     __ add(rscratch1, rscratch1, MAX2(3, Method::extra_stack_entries()));
     __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3);
     __ andr(rscratch1, rscratch1, -16);
@@ -1013,7 +1018,7 @@ address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
 
   Label slow_path;
   // If we need a safepoint check, generate full interpreter entry.
-  __ safepoint_poll(slow_path, false /* at_return */, false /* acquire */, false /* in_nmethod */);
+  __ safepoint_poll(slow_path, false /* at_return */, false /* in_nmethod */);
 
   // We don't generate local frame and don't align stack because
   // we call stub code and there is no safepoint on this path.
@@ -1060,7 +1065,7 @@ address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractI
 
   Label slow_path;
   // If we need a safepoint check, generate full interpreter entry.
-  __ safepoint_poll(slow_path, false /* at_return */, false /* acquire */, false /* in_nmethod */);
+  __ safepoint_poll(slow_path, false /* at_return */, false /* in_nmethod */);
 
   // We don't generate local frame and don't align stack because
   // we call stub code and there is no safepoint on this path.
@@ -1450,7 +1455,7 @@ address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
     Label L, Continue;
 
     // No need for acquire as Java threads always disarm themselves.
-    __ safepoint_poll(L, true /* at_return */, false /* acquire */, false /* in_nmethod */);
+    __ safepoint_poll(L, true /* at_return */, false /* in_nmethod */);
     __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset()));
     __ cbz(rscratch2, Continue);
     __ bind(L);
@@ -1593,6 +1598,30 @@ address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
     __ bind(L);
   }
 
+  #if INCLUDE_JFR
+  __ enter_jfr_critical_section();
+
+  // This poll test is to uphold the invariant that a JFR sampled frame
+  // must not return to its caller without a prior safepoint poll check.
+  // The earlier poll check in this routine is insufficient for this purpose
+  // because the thread has transitioned back to Java.
+
+  Label slow_path;
+  Label fast_path;
+  __ safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
+  __ br(Assembler::AL, fast_path);
+  __ bind(slow_path);
+  __ push(dtos);
+  __ push(ltos);
+  __ set_last_Java_frame(esp, rfp, __ pc(), rscratch1);
+  __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
+  __ reset_last_Java_frame(true);
+  __ pop(ltos);
+  __ pop(dtos);
+  __ bind(fast_path);
+
+#endif // INCLUDE_JFR
+
   // jvmti support
   // Note: This must happen _after_ handling/throwing any exceptions since
   //       the exception handler code notifies the runtime of method exits
@@ -1615,6 +1644,8 @@ address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
   // remove frame anchor
   __ leave();
 
+  JFR_ONLY(__ leave_jfr_critical_section();)
+
   // restore sender sp
   __ mov(sp, esp);
 
@@ -1862,6 +1893,7 @@ void TemplateInterpreterGenerator::generate_throw_exception() {
 
   Interpreter::_remove_activation_preserving_args_entry = __ pc();
   __ empty_expression_stack();
+  __ restore_bcp(); // We could have returned from deoptimizing this frame, so restore rbcp.
   // Set the popframe_processing bit in pending_popframe_condition
   // indicating that we are currently handling popframe, so that
   // call_VMs that may happen later do not trigger new popframe

src/hotspot/cpu/aarch64/templateTable_aarch64.cpp

@@ -1144,6 +1144,7 @@ void TemplateTable::aastore() {
   // Get the value we will store
   __ ldr(r0, at_tos());
   // Now store using the appropriate barrier
+  // Clobbers: r10, r11, r3
   do_oop_store(_masm, element_address, r0, IS_ARRAY);
   __ b(done);
 
@@ -1152,6 +1153,7 @@ void TemplateTable::aastore() {
   __ profile_null_seen(r2);
 
   // Store a null
+  // Clobbers: r10, r11, r3
   do_oop_store(_masm, element_address, noreg, IS_ARRAY);
 
   // Pop stack arguments
@@ -1757,7 +1759,7 @@ void TemplateTable::float_cmp(bool is_float, int unordered_result)
 
 void TemplateTable::branch(bool is_jsr, bool is_wide)
 {
-  __ profile_taken_branch(r0, r1);
+  __ profile_taken_branch(r0);
   const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
                              InvocationCounter::counter_offset();
   const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
@@ -1807,7 +1809,6 @@ void TemplateTable::branch(bool is_jsr, bool is_wide)
   if (UseLoopCounter) {
     // increment backedge counter for backward branches
     // r0: MDO
-    // w1: MDO bumped taken-count
     // r2: target offset
     __ cmp(r2, zr);
     __ br(Assembler::GT, dispatch); // count only if backward branch
@@ -1818,12 +1819,10 @@ void TemplateTable::branch(bool is_jsr, bool is_wide)
     __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
     __ cbnz(rscratch1, has_counters);
     __ push(r0);
-    __ push(r1);
     __ push(r2);
     __ call_VM(noreg, CAST_FROM_FN_PTR(address,
             InterpreterRuntime::build_method_counters), rmethod);
     __ pop(r2);
-    __ pop(r1);
     __ pop(r0);
     __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
     __ cbz(rscratch1, dispatch); // No MethodCounters allocated, OutOfMemory
@@ -1890,6 +1889,8 @@ void TemplateTable::branch(bool is_jsr, bool is_wide)
 
     __ mov(r19, r0);                             // save the nmethod
 
+    JFR_ONLY(__ enter_jfr_critical_section();)
+
     call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
 
     // r0 is OSR buffer, move it to expected parameter location
@@ -1901,6 +1902,9 @@ void TemplateTable::branch(bool is_jsr, bool is_wide)
         Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
     // remove frame anchor
     __ leave();
+
+    JFR_ONLY(__ leave_jfr_critical_section();)
+
     // Ensure compiled code always sees stack at proper alignment
     __ andr(sp, esp, -16);
 
@@ -2877,6 +2881,7 @@ void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteContr
     __ pop(atos);
     if (!is_static) pop_and_check_object(obj);
     // Store into the field
+    // Clobbers: r10, r11, r3
     do_oop_store(_masm, field, r0, IN_HEAP);
     if (rc == may_rewrite) {
       patch_bytecode(Bytecodes::_fast_aputfield, bc, r1, true, byte_no);
@@ -3072,12 +3077,12 @@ void TemplateTable::fast_storefield(TosState state)
   // access constant pool cache
   __ load_field_entry(r2, r1);
 
-  // R1: field offset, R2: field holder, R3: flags
-  load_resolved_field_entry(r2, r2, noreg, r1, r3);
+  // R1: field offset, R2: field holder, R5: flags
+  load_resolved_field_entry(r2, r2, noreg, r1, r5);
 
   {
     Label notVolatile;
-    __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
+    __ tbz(r5, ResolvedFieldEntry::is_volatile_shift, notVolatile);
     __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore);
     __ bind(notVolatile);
   }
@@ -3093,6 +3098,7 @@ void TemplateTable::fast_storefield(TosState state)
   // access field
   switch (bytecode()) {
   case Bytecodes::_fast_aputfield:
+    // Clobbers: r10, r11, r3
     do_oop_store(_masm, field, r0, IN_HEAP);
     break;
   case Bytecodes::_fast_lputfield:
@@ -3125,7 +3131,7 @@ void TemplateTable::fast_storefield(TosState state)
 
   {
     Label notVolatile;
-    __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
+    __ tbz(r5, ResolvedFieldEntry::is_volatile_shift, notVolatile);
     __ membar(MacroAssembler::StoreLoad | MacroAssembler::StoreStore);
     __ bind(notVolatile);
   }

src/hotspot/cpu/aarch64/vm_version_aarch64.cpp

@@ -51,21 +51,12 @@ uintptr_t VM_Version::_pac_mask;
 SpinWait VM_Version::_spin_wait;
 
 static SpinWait get_spin_wait_desc() {
-  if (strcmp(OnSpinWaitInst, "nop") == 0) {
-    return SpinWait(SpinWait::NOP, OnSpinWaitInstCount);
-  } else if (strcmp(OnSpinWaitInst, "isb") == 0) {
-    return SpinWait(SpinWait::ISB, OnSpinWaitInstCount);
-  } else if (strcmp(OnSpinWaitInst, "yield") == 0) {
-    return SpinWait(SpinWait::YIELD, OnSpinWaitInstCount);
-  } else if (strcmp(OnSpinWaitInst, "none") != 0) {
-    vm_exit_during_initialization("The options for OnSpinWaitInst are nop, isb, yield, and none", OnSpinWaitInst);
+  SpinWait spin_wait(OnSpinWaitInst, OnSpinWaitInstCount);
+  if (spin_wait.inst() == SpinWait::SB && !VM_Version::supports_sb()) {
+    vm_exit_during_initialization("OnSpinWaitInst is SB but current CPU does not support SB instruction");
   }
 
-  if (!FLAG_IS_DEFAULT(OnSpinWaitInstCount) && OnSpinWaitInstCount > 0) {
-    vm_exit_during_initialization("OnSpinWaitInstCount cannot be used for OnSpinWaitInst 'none'");
-  }
-
-  return SpinWait{};
+  return spin_wait;
 }
 
 void VM_Version::initialize() {
@@ -379,7 +370,7 @@ void VM_Version::initialize() {
         FLAG_SET_DEFAULT(UseSHA3Intrinsics, true);
       }
     }
-  } else if (UseSHA3Intrinsics) {
+  } else if (UseSHA3Intrinsics && UseSIMDForSHA3Intrinsic) {
     warning("Intrinsics for SHA3-224, SHA3-256, SHA3-384 and SHA3-512 crypto hash functions not available on this CPU.");
     FLAG_SET_DEFAULT(UseSHA3Intrinsics, false);
   }

src/hotspot/cpu/aarch64/vm_version_aarch64.hpp

@@ -131,6 +131,7 @@ enum Ampere_CPU_Model {
     decl(SHA3,          sha3,          17)    \
     decl(SHA512,        sha512,        21)    \
     decl(SVE,           sve,           22)    \
+    decl(SB,            sb,            29)    \
     decl(PACA,          paca,          30)    \
     /* flags above must follow Linux HWCAP */ \
     decl(SVEBITPERM,    svebitperm,    27)    \