Merge commit '90094f5657dcda46cffe1804449969e289aa9ff2' into llvmspir…

…v_pulldown

.ci/generate-buildkite-pipeline-premerge

@@ -128,9 +128,8 @@ if [[ "${windows_projects}" != "" ]]; then
         limit: 2
   timeout_in_minutes: 150
   env:
-    CC: 'cl'
-    CXX: 'cl'
-    LD: 'link'
+    MAX_PARALLEL_COMPILE_JOBS: '16'
+    MAX_PARALLEL_LINK_JOBS: '4'
   commands:
   - 'C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64'
   - 'bash .ci/monolithic-windows.sh "$(echo ${windows_projects} | tr ' ' ';')" "$(echo ${windows_check_targets})"'

.ci/metrics/metrics.py

@@ -130,34 +130,6 @@ def get_per_workflow_metrics(
         workflow_jobs = workflow_run.jobs()
         if workflow_jobs.totalCount == 0:
             continue
-        if workflow_jobs.totalCount > 1:
-            raise ValueError(
-                f"Encountered an unexpected number of jobs: {workflow_jobs.totalCount}"
-            )
-
-        created_at = workflow_jobs[0].created_at
-        started_at = workflow_jobs[0].started_at
-        completed_at = workflow_jobs[0].completed_at
-
-        job_result = int(workflow_jobs[0].conclusion == "success")
-        if job_result:
-            # We still might want to mark the job as a failure if one of the steps
-            # failed. This is required due to use setting continue-on-error in
-            # the premerge pipeline to prevent sending emails while we are
-            # testing the infrastructure.
-            # TODO(boomanaiden154): Remove this once the premerge pipeline is no
-            # longer in a testing state and we can directly assert the workflow
-            # result.
-            for step in workflow_jobs[0].steps:
-                if step.conclusion != "success":
-                    job_result = 0
-                    break
-
-        queue_time = started_at - created_at
-        run_time = completed_at - started_at
-
-        if run_time.seconds == 0:
-            continue
 
         if (
             workflows_to_track[workflow_run.name] is None
@@ -170,20 +142,45 @@ def get_per_workflow_metrics(
         ):
             break
 
-        # The timestamp associated with the event is expected by Grafana to be
-        # in nanoseconds.
-        created_at_ns = int(created_at.timestamp()) * 10**9
-
-        workflow_metrics.append(
-            JobMetrics(
-                workflow_run.name,
-                queue_time.seconds,
-                run_time.seconds,
-                job_result,
-                created_at_ns,
-                workflow_run.id,
+        for workflow_job in workflow_jobs:
+            created_at = workflow_job.created_at
+            started_at = workflow_job.started_at
+            completed_at = workflow_job.completed_at
+
+            job_result = int(workflow_job.conclusion == "success")
+            if job_result:
+                # We still might want to mark the job as a failure if one of the steps
+                # failed. This is required due to use setting continue-on-error in
+                # the premerge pipeline to prevent sending emails while we are
+                # testing the infrastructure.
+                # TODO(boomanaiden154): Remove this once the premerge pipeline is no
+                # longer in a testing state and we can directly assert the workflow
+                # result.
+                for step in workflow_job.steps:
+                    if step.conclusion != "success":
+                        job_result = 0
+                        break
+
+            queue_time = started_at - created_at
+            run_time = completed_at - started_at
+
+            if run_time.seconds == 0:
+                continue
+
+            # The timestamp associated with the event is expected by Grafana to be
+            # in nanoseconds.
+            created_at_ns = int(created_at.timestamp()) * 10**9
+
+            workflow_metrics.append(
+                JobMetrics(
+                    workflow_run.name + "-" + workflow_job.name,
+                    queue_time.seconds,
+                    run_time.seconds,
+                    job_result,
+                    created_at_ns,
+                    workflow_run.id,
+                )
             )
-        )
 
     return workflow_metrics
 

.ci/monolithic-windows.sh

@@ -50,6 +50,10 @@ echo "--- cmake"
 pip install -q -r "${MONOREPO_ROOT}"/mlir/python/requirements.txt
 pip install -q -r "${MONOREPO_ROOT}"/.ci/requirements.txt
 
+export CC=cl
+export CXX=cl
+export LD=link
+
 # The CMAKE_*_LINKER_FLAGS to disable the manifest come from research
 # on fixing a build reliability issue on the build server, please
 # see https://github.com/llvm/llvm-project/pull/82393 and
@@ -72,8 +76,8 @@ cmake -S "${MONOREPO_ROOT}"/llvm -B "${BUILD_DIR}" \
       -D CMAKE_EXE_LINKER_FLAGS="/MANIFEST:NO" \
       -D CMAKE_MODULE_LINKER_FLAGS="/MANIFEST:NO" \
       -D CMAKE_SHARED_LINKER_FLAGS="/MANIFEST:NO" \
-      -D LLVM_PARALLEL_COMPILE_JOBS=16 \
-      -D LLVM_PARALLEL_LINK_JOBS=4
+      -D LLVM_PARALLEL_COMPILE_JOBS=${MAX_PARALLEL_COMPILE_JOBS} \
+      -D LLVM_PARALLEL_LINK_JOBS=${MAX_PARALLEL_LINK_JOBS}
 
 echo "--- ninja"
 # Targets are not escaped as they are passed as separate arguments.

.github/workflows/containers/github-action-ci-windows/Dockerfile

@@ -108,7 +108,7 @@ RUN choco install -y handle
 
 RUN pip3 install pywin32 buildbot-worker==2.8.4
 
-ARG RUNNER_VERSION=2.321.0
+ARG RUNNER_VERSION=2.322.0
 ENV RUNNER_VERSION=$RUNNER_VERSION
 
 RUN powershell -Command \

.github/workflows/containers/github-action-ci/Dockerfile

@@ -96,7 +96,7 @@ WORKDIR /home/gha
 
 FROM ci-container as ci-container-agent
 
-ENV GITHUB_RUNNER_VERSION=2.321.0
+ENV GITHUB_RUNNER_VERSION=2.322.0
 
 RUN mkdir actions-runner && \
     cd actions-runner && \

.github/workflows/libc-fullbuild-tests.yml

@@ -11,12 +11,19 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-24.04
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         include:
-          - c_compiler: clang
+          - os: ubuntu-24.04
+            ccache-variant: sccache
+            c_compiler: clang
+            cpp_compiler: clang++
+          # TODO: remove ccache logic when https://github.com/hendrikmuhs/ccache-action/issues/279 is resolved.
+          - os: ubuntu-24.04-arm
+            ccache-variant: ccache
+            c_compiler: clang
             cpp_compiler: clang++
           # TODO: add back gcc build when it is fixed
           # - c_compiler: gcc
@@ -35,7 +42,7 @@ jobs:
       with:
         max-size: 1G
         key: libc_fullbuild_${{ matrix.c_compiler }}
-        variant: sccache
+        variant: ${{ matrix.ccache-variant }}
 
     # Notice:
     # - MPFR is required by some of the mathlib tests.
@@ -62,8 +69,8 @@ jobs:
         -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
         -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
         -DCMAKE_BUILD_TYPE=MinSizeRel
-        -DCMAKE_C_COMPILER_LAUNCHER=sccache
-        -DCMAKE_CXX_COMPILER_LAUNCHER=sccache
+        -DCMAKE_C_COMPILER_LAUNCHER=${{ matrix.ccache-variant }}
+        -DCMAKE_CXX_COMPILER_LAUNCHER=${{ matrix.ccache-variant }}
         -DCMAKE_INSTALL_PREFIX=${{ steps.strings.outputs.build-install-dir }}
         -DLLVM_ENABLE_RUNTIMES="libc;compiler-rt"
         -DLLVM_LIBC_FULL_BUILD=ON

.github/workflows/libc-overlay-tests.yml

@@ -19,14 +19,28 @@ jobs:
         include:
           # TODO: add linux gcc when it is fixed
           - os: ubuntu-24.04
+            ccache-variant: sccache
+            compiler:
+              c_compiler: clang
+              cpp_compiler: clang++
+          # TODO: remove ccache logic when https://github.com/hendrikmuhs/ccache-action/issues/279 is resolved.
+          - os: ubuntu-24.04-arm
+            ccache-variant: ccache
             compiler:
               c_compiler: clang
               cpp_compiler: clang++
           - os: windows-2022
+            ccache-variant: sccache
+            compiler:
+              c_compiler: clang-cl
+              cpp_compiler: clang-cl
+          - os: windows-2025
+            ccache-variant: sccache
             compiler:
               c_compiler: clang-cl
               cpp_compiler: clang-cl
           - os: macos-14
+            ccache-variant: sccache
             compiler:
               c_compiler: clang
               cpp_compiler: clang++
@@ -46,7 +60,7 @@ jobs:
       with:
         max-size: 1G
         key: libc_overlay_build_${{ matrix.os }}_${{ matrix.compiler.c_compiler }}
-        variant: sccache
+        variant: ${{ matrix.ccache-variant }}
 
     # MPFR is required by some of the mathlib tests.
     - name: Prepare dependencies (Ubuntu)
@@ -82,8 +96,8 @@ jobs:
         -DCMAKE_CXX_COMPILER=${{ matrix.compiler.cpp_compiler }}
         -DCMAKE_C_COMPILER=${{ matrix.compiler.c_compiler }}
         -DCMAKE_BUILD_TYPE=MinSizeRel
-        -DCMAKE_C_COMPILER_LAUNCHER=sccache
-        -DCMAKE_CXX_COMPILER_LAUNCHER=sccache
+        -DCMAKE_C_COMPILER_LAUNCHER=${{ matrix.ccache-variant }}
+        -DCMAKE_CXX_COMPILER_LAUNCHER=${{ matrix.ccache-variant }}
         -DCMAKE_POLICY_DEFAULT_CMP0141=NEW
         -DCMAKE_MSVC_DEBUG_INFORMATION_FORMAT=Embedded
         -DLLVM_ENABLE_RUNTIMES=libc

.github/workflows/libcxx-build-and-test.yaml

@@ -48,8 +48,8 @@ jobs:
           'generic-cxx26',
           'generic-modules'
         ]
-        cc: [  'clang-19' ]
-        cxx: [ 'clang++-19' ]
+        cc: [  'clang-20' ]
+        cxx: [ 'clang++-20' ]
         include:
           - config: 'generic-gcc'
             cc: 'gcc-14'
@@ -88,18 +88,18 @@ jobs:
           'generic-cxx20',
           'generic-cxx23'
         ]
-        cc: [ 'clang-19' ]
-        cxx: [ 'clang++-19' ]
+        cc: [ 'clang-20' ]
+        cxx: [ 'clang++-20' ]
         include:
           - config: 'generic-gcc-cxx11'
             cc: 'gcc-14'
             cxx: 'g++-14'
           - config: 'generic-cxx23'
-            cc: 'clang-17'
-            cxx: 'clang++-17'
-          - config: 'generic-cxx26'
             cc: 'clang-18'
             cxx: 'clang++-18'
+          - config: 'generic-cxx26'
+            cc: 'clang-19'
+            cxx: 'clang++-19'
     steps:
       - uses: actions/checkout@v4
       - name: ${{ matrix.config }}
@@ -169,8 +169,8 @@ jobs:
       - name: ${{ matrix.config }}
         run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
         env:
-          CC: clang-19
-          CXX: clang++-19
+          CC: clang-20
+          CXX: clang++-20
       - uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
         if: always()
         with:

.github/workflows/premerge.yaml

@@ -16,7 +16,7 @@ jobs:
     if: github.repository_owner == 'llvm'
     runs-on: llvm-premerge-linux-runners
     concurrency:
-      group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+      group: ${{ github.workflow }}-linux-${{ github.event.pull_request.number || github.sha }}
       cancel-in-progress: true
     steps:
       - name: Checkout LLVM
@@ -70,3 +70,65 @@ jobs:
           export CXX=/opt/llvm/bin/clang++
 
           ./.ci/monolithic-linux.sh "$(echo ${linux_projects} | tr ' ' ';')" "$(echo ${linux_check_targets})" "$(echo ${linux_runtimes} | tr ' ' ';')" "$(echo ${linux_runtime_check_targets})"
+
+  premerge-checks-windows:
+    if: github.repository_owner == 'llvm'
+    runs-on: llvm-premerge-windows-runners
+    concurrency:
+      group: ${{ github.workflow }}-windows-${{ github.event.pull_request.number || github.sha }}
+      cancel-in-progress: true
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - name: Checkout LLVM
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+      - name: Setup ccache
+        uses: hendrikmuhs/[email protected]
+        with:
+          variant: "sccache"
+          max-size: "2000M"
+      - name: Compute Projects
+        id: vars
+        run: |
+          modified_files=$(git diff --name-only HEAD~1...HEAD)
+          modified_dirs=$(echo "$modified_files" | cut -d'/' -f1 | sort | uniq)
+
+          echo $modified_files
+          echo $modified_dirs
+
+          . ./.ci/compute-projects.sh
+
+          all_projects="bolt clang clang-tools-extra compiler-rt cross-project-tests flang libc libclc lld lldb llvm mlir openmp polly pstl"
+          modified_projects="$(keep-modified-projects ${all_projects})"
+
+          windows_projects_to_test=$(exclude-windows $(compute-projects-to-test 1 ${modified_projects}))
+          windows_check_targets=$(check-targets ${windows_projects_to_test} | sort | uniq | tr -d '\r' | tr '\n' ' ')
+          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq | tr -d '\r' | tr '\n' ';')
+
+          if [[ "${windows_projects}" == "" ]]; then
+            echo "No projects to build"
+          fi
+
+          echo "Building projects: ${windows_projects}"
+          echo "Running project checks targets: ${windows_check_targets}"
+
+          echo "windows-projects=${windows_projects}" >> $GITHUB_OUTPUT
+          echo "windows-check-targets=${windows_check_targets}" >> $GITHUB_OUTPUT
+      - name: Build and Test
+        # Mark the job as a success even if the step fails so that people do
+        # not get notified while the new premerge pipeline is in an
+        # experimental state.
+        # TODO(boomanaiden154): Remove this once the pipeline is stable and we
+        # are ready for people to start recieving notifications.
+        continue-on-error: true
+        if: ${{ steps.vars.outputs.windows-projects != '' }}
+        shell: cmd
+        run: |
+          set MAX_PARALLEL_COMPILE_JOBS=64
+          set MAX_PARALLEL_LINK_JOBS=64
+          call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
+          bash .ci/monolithic-windows.sh "${{ steps.vars.outputs.windows-projects }}" "${{ steps.vars.outputs.windows-check-targets }}"
+

.github/workflows/release-binaries-all.yml

@@ -83,6 +83,7 @@ jobs:
       matrix:
         runs-on:
           - ubuntu-22.04
+          - ubuntu-22.04-arm
           - macos-13
           - macos-14