[llvm] [Github][CI] Add Windows Premerge Job for Testing (PR #122661)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 updated https://github.com/llvm/llvm-project/pull/122661

>From e58f893e86937829675e74a6db341b31c7b0dbf3 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Sun, 19 Jan 2025 22:59:54 +0000
Subject: [PATCH 1/3] [Github][CI] Add Windows Premerge Job for Testing

This patch adds a windows premerge job for testing. We plan to enable this
by default soon once we have evaluated stability and have reasonably reason
to believe the system is reliable.
---
 .github/workflows/premerge.yaml | 53 +++------------------------------
 1 file changed, 4 insertions(+), 49 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 6c7f1d81a953e1..1b6b10a8b7c3ee 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -12,17 +12,12 @@ on:
       - 'main'
 
 jobs:
-  premerge-checks-linux:
+  premerge-checks-windows:
     if: github.repository_owner == 'llvm'
-    runs-on: llvm-premerge-linux-runners
+    runs-on: llvm-premerge-windows-runners
     concurrency:
-      group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+      group: ${{ github.workflow }}-windows-${{ github.event.pull_request.number || github.sha }}
       cancel-in-progress: true
-    container:
-      image: ghcr.io/llvm/ci-ubuntu-22.04:latest
-    defaults:
-      run:
-        shell: bash
     steps:
       - name: Checkout LLVM
         uses: actions/checkout at v4
@@ -30,48 +25,8 @@ jobs:
           fetch-depth: 2
       - name: Setup ccache
         uses: hendrikmuhs/ccache-action at v1.2.14
-        with:
-          max-size: "2000M"
       - 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
         run: |
-          git config --global --add safe.directory '*'
-
-          modified_files=$(git diff --name-only HEAD~1...HEAD)
-          modified_dirs=$(echo "$modified_files" | cut -d'/' -f1 | sort -u)
-
-          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 ${all_projects})"
-
-          linux_projects_to_test=$(exclude-linux $(compute-projects-to-test 0 ${modified_projects}))
-          linux_check_targets=$(check-targets ${linux_projects_to_test} | sort | uniq)
-          linux_projects=$(add-dependencies ${linux_projects_to_test} | sort | uniq)
-
-          linux_runtimes_to_test=$(compute-runtimes-to-test ${linux_projects_to_test})
-          linux_runtime_check_targets=$(check-targets ${linux_runtimes_to_test} | sort | uniq)
-          linux_runtimes=$(echo ${linux_runtimes_to_test} | sort | uniq)
-
-          if [[ "${linux_projects}" == "" ]]; then
-            echo "No projects to build"
-            exit 0
-          fi
-
-          echo "Building projects: ${linux_projects}"
-          echo "Running project checks targets: ${linux_check_targets}"
-          echo "Building runtimes: ${linux_runtimes}"
-          echo "Running runtimes checks targets: ${linux_runtime_check_targets}"
-
-          export CC=/opt/llvm/bin/clang
-          export CXX=/opt/llvm/bin/clang++
+          echo test
 
-          ./.ci/monolithic-linux.sh "$(echo ${linux_projects} | tr ' ' ';')" "$(echo ${linux_check_targets})" "$(echo ${linux_runtimes} | tr ' ' ';')" "$(echo ${linux_runtime_check_targets})"

>From 115825c8052bc08e6523747fcac9f74c7dedc453 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Mon, 20 Jan 2025 06:04:30 +0000
Subject: [PATCH 2/3] change shell

---
 .github/workflows/premerge.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 1b6b10a8b7c3ee..a353ffeb133eeb 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -18,6 +18,9 @@ jobs:
     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 at v4

>From cdfbb611bb3d92bb8fb9e0f74955d143534f30b3 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Mon, 20 Jan 2025 06:22:14 +0000
Subject: [PATCH 3/3] force sccache

---
 .github/workflows/premerge.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index a353ffeb133eeb..39bc4837d26353 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -28,6 +28,8 @@ jobs:
           fetch-depth: 2
       - name: Setup ccache
         uses: hendrikmuhs/ccache-action at v1.2.14
+        with:
+          variant: "sccache"
       - name: Build and Test
         continue-on-error: true
         run: |