From b5a1dc1d6ab424f1098005cb214f668301d53280 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sun, 19 Jan 2025 22:59:54 +0000
Subject: [PATCH 01/25] [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 | 48 +++------------------------------
 1 file changed, 4 insertions(+), 44 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 30f4fc807f3a5..1b6b10a8b7c3e 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -12,11 +12,11 @@ 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
     steps:
       - name: Checkout LLVM
@@ -25,48 +25,8 @@ jobs:
           fetch-depth: 2
       - name: Setup ccache
         uses: hendrikmuhs/ccache-action@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 2ea666ec16719bfa9f56384bbe8114eb6c8b88f8 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Mon, 20 Jan 2025 06:04:30 +0000
Subject: [PATCH 02/25] 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 1b6b10a8b7c3e..a353ffeb133ee 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@v4

From cc4a4ddd4904befaead8b65256eb3aa39ff935a2 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Mon, 20 Jan 2025 06:22:14 +0000
Subject: [PATCH 03/25] 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 a353ffeb133ee..39bc4837d2635 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@v1.2.14
+        with:
+          variant: "sccache"
       - name: Build and Test
         continue-on-error: true
         run: |

From eccfebfc9bf2f976e52951edb826cb2b08100216 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Mon, 20 Jan 2025 06:27:18 +0000
Subject: [PATCH 04/25] compute projects

---
 .github/workflows/premerge.yaml | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 39bc4837d2635..eb33b4dbe058f 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -33,5 +33,14 @@ jobs:
       - name: Build and Test
         continue-on-error: true
         run: |
-          echo test
+          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})"
 

From 7ee39254c56fa7a04a56bfe61b21505c90daf041 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Mon, 20 Jan 2025 06:31:19 +0000
Subject: [PATCH 05/25] More testing

---
 .github/workflows/premerge.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index eb33b4dbe058f..3a3c3a71e08a4 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -44,3 +44,17 @@ jobs:
           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 ${windows_projects_to_test} | sort | uniq)
+          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq)
+
+          if [[ "${windows_projects}" == "" ]]; then
+            echo "No projects to build"
+            exit 0
+          fi
+
+          echo "Building projects: ${windows_projects}"
+          echo "Running project checks targets: ${windows_check_targets}"
+
+          .ci/monolithic-windows.sh "$(echo ${windows_projects} | tr ' ' ';')" "$(echo ${windows_check_targets})"
+

From 5a85ff241c676594dee3901cc85044ed709259ed Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Mon, 20 Jan 2025 06:40:57 +0000
Subject: [PATCH 06/25] adapt to windows sort

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 3a3c3a71e08a4..f6b409af9c8b5 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -34,7 +34,7 @@ jobs:
         continue-on-error: true
         run: |
           modified_files=$(git diff --name-only HEAD~1...HEAD)
-          modified_dirs=$(echo "$modified_files" | cut -d'/' -f1 | sort -u)
+          modified_dirs=$(echo "$modified_files" | cut -d'/' -f1 | sort | uniq)
 
           echo $modified_files
           echo $modified_dirs

From b80ae16cd820c9893035f189d004d358b9e60db3 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Thu, 23 Jan 2025 08:41:16 +0000
Subject: [PATCH 07/25] test

---
 .ci/monolithic-windows.sh       |  8 +++++---
 .github/workflows/premerge.yaml | 15 +++++++++++----
 llvm/CMakeLists.txt             |  2 +-
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/.ci/monolithic-windows.sh b/.ci/monolithic-windows.sh
index 68303a3ea153a..43a8f23498718 100755
--- a/.ci/monolithic-windows.sh
+++ b/.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
@@ -71,9 +75,7 @@ cmake -S "${MONOREPO_ROOT}"/llvm -B "${BUILD_DIR}" \
       -D MLIR_ENABLE_BINDINGS_PYTHON=ON \
       -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 CMAKE_SHARED_LINKER_FLAGS="/MANIFEST:NO"
 
 echo "--- ninja"
 # Targets are not escaped as they are passed as separate arguments.
diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index f6b409af9c8b5..f53c7615a4bf4 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -30,8 +30,8 @@ jobs:
         uses: hendrikmuhs/ccache-action@v1.2.14
         with:
           variant: "sccache"
-      - name: Build and Test
-        continue-on-error: true
+      - 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)
@@ -56,5 +56,12 @@ jobs:
           echo "Building projects: ${windows_projects}"
           echo "Running project checks targets: ${windows_check_targets}"
 
-          .ci/monolithic-windows.sh "$(echo ${windows_projects} | tr ' ' ';')" "$(echo ${windows_check_targets})"
-
+          #echo "windows-projects=${windows_projects}" >> $GITHUB_OUTPUT
+          #echo "windows-check-targets=${windows_check_targets}" >> $GITHUB_OUTPUT
+          echo "windows-projects=llvm" >> $GITHUB_OUTPUT
+          echo "windows-check-targets=check-llvm" >> $GITHUB_OUTPUT
+      - name: Build and Test
+        shell: cmd
+        run: |
+          call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
+          bash .ci/monolithic-windows.sh "llvm;clang" "check-llvm check-clang"
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index ad12100fdb5b8..3ea8f6e17a638 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -1,5 +1,5 @@
 # See docs/CMake.html for instructions about how to build LLVM with CMake.
-
+# comment
 cmake_minimum_required(VERSION 3.20.0)
 
 include(CMakeDependentOption)

From 44ec1393e6bd96afa808fbac9169027d219af1cd Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 05:55:30 +0000
Subject: [PATCH 08/25] More testing

---
 .github/workflows/premerge.yaml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index f53c7615a4bf4..c46fe08f6c711 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -56,12 +56,12 @@ jobs:
           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
-          echo "windows-projects=llvm" >> $GITHUB_OUTPUT
-          echo "windows-check-targets=check-llvm" >> $GITHUB_OUTPUT
+          echo "windows-projects=${windows_projects}" >> $GITHUB_OUTPUT
+          echo "windows-check-targets=${windows_check_targets}" >> $GITHUB_OUTPUT
       - name: Build and Test
         shell: cmd
         run: |
-          call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
-          bash .ci/monolithic-windows.sh "llvm;clang" "check-llvm check-clang"
+          echo "$ {{ steps.vars.outputs.windows-projects }}"
+          echo "$ {{ steps.vars.outputs.windows-check-targets }}"
+          #call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
+          #bash .ci/monolithic-windows.sh "llvm;clang" "check-llvm check-clang"

From 46f060cff3fa4b02a69dfec5c4f3841aa3ef93fd Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 05:59:56 +0000
Subject: [PATCH 09/25] try tr

---
 .github/workflows/premerge.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index c46fe08f6c711..cd342d00dcfa6 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -45,8 +45,8 @@ jobs:
           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 ${windows_projects_to_test} | sort | uniq)
-          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq)
+          windows_check_targets=$(check-targets ${windows_projects_to_test} | sort | uniq | tr '\n' ' ')
+          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq | tr '\n' ';')
 
           if [[ "${windows_projects}" == "" ]]; then
             echo "No projects to build"

From 6d1da7214f59f185fa60261642b56393932e7e62 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 06:09:10 +0000
Subject: [PATCH 10/25] testing

---
 .github/workflows/premerge.yaml | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index cd342d00dcfa6..ba2ff89df9927 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -45,14 +45,18 @@ jobs:
           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 ${windows_projects_to_test} | sort | uniq | tr '\n' ' ')
-          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq | tr '\n' ';')
+          windows_check_targets=$(check-targets ${windows_projects_to_test} | sort | uniq)
+          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq)
 
           if [[ "${windows_projects}" == "" ]]; then
             echo "No projects to build"
             exit 0
           fi
 
+          echo blah1
+          echo "${windows_projects}" | tr '\n' ';'
+          echo blah2
+
           echo "Building projects: ${windows_projects}"
           echo "Running project checks targets: ${windows_check_targets}"
 

From 0b8707c4850a9ebeb2c4669ea63fa2be754a0484 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 06:12:35 +0000
Subject: [PATCH 11/25] windows line endings

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index ba2ff89df9927..7fafc4bc018c5 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -54,7 +54,7 @@ jobs:
           fi
 
           echo blah1
-          echo "${windows_projects}" | tr '\n' ';'
+          echo "${windows_projects}" | tr '\r\n' ';'
           echo blah2
 
           echo "Building projects: ${windows_projects}"

From 0da5e37a86cdb1e7f417cf69d899750ab1c04767 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 06:16:51 +0000
Subject: [PATCH 12/25] more testing

---
 .github/workflows/premerge.yaml | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 7fafc4bc018c5..fffa564e74dd8 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -45,18 +45,14 @@ jobs:
           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 ${windows_projects_to_test} | sort | uniq)
-          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq)
+          windows_check_targets=$(check-targets ${windows_projects_to_test} | sort | uniq | tr '\015' ' ')
+          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq | tr '\015' ';')
 
           if [[ "${windows_projects}" == "" ]]; then
             echo "No projects to build"
             exit 0
           fi
 
-          echo blah1
-          echo "${windows_projects}" | tr '\r\n' ';'
-          echo blah2
-
           echo "Building projects: ${windows_projects}"
           echo "Running project checks targets: ${windows_check_targets}"
 

From 79c8d86aa7b40e17aa84140a5771f58b4a0f01f7 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 06:20:00 +0000
Subject: [PATCH 13/25] more testing

---
 .github/workflows/premerge.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index fffa564e74dd8..dab775454d143 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -45,8 +45,8 @@ jobs:
           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 ${windows_projects_to_test} | sort | uniq | tr '\015' ' ')
-          windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq | tr '\015' ';')
+          windows_check_targets=$(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"

From dc1d060e1713cd9ca27ebd3ada28e86a933fb842 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 06:22:46 +0000
Subject: [PATCH 14/25] Try changing vars

---
 .github/workflows/premerge.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index dab775454d143..03820b52950d3 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -61,7 +61,7 @@ jobs:
       - name: Build and Test
         shell: cmd
         run: |
-          echo "$ {{ steps.vars.outputs.windows-projects }}"
-          echo "$ {{ steps.vars.outputs.windows-check-targets }}"
+          echo "${{ steps.vars.outputs.windows-projects }}"
+          echo "${{ steps.vars.outputs.windows-check-targets }}"
           #call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
           #bash .ci/monolithic-windows.sh "llvm;clang" "check-llvm check-clang"

From 0b32e2ec5e49fe726333e45d98e6c398418c8f99 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Fri, 24 Jan 2025 06:25:58 +0000
Subject: [PATCH 15/25] maybe

---
 .github/workflows/premerge.yaml | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 03820b52950d3..6135946f6568c 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -61,7 +61,6 @@ jobs:
       - name: Build and Test
         shell: cmd
         run: |
-          echo "${{ steps.vars.outputs.windows-projects }}"
-          echo "${{ steps.vars.outputs.windows-check-targets }}"
-          #call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
-          #bash .ci/monolithic-windows.sh "llvm;clang" "check-llvm check-clang"
+          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 }}"
+

From a7a3aafc5f2c404afb9f75f06c706e26e58b1cbb Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 06:02:41 +0000
Subject: [PATCH 16/25] set flags

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 6135946f6568c..4d4f5d939e097 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -61,6 +61,8 @@ jobs:
       - name: Build and Test
         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 }}"
 

From 970bcee8152d8525b72b2e7275847c97633d3fe5 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 06:16:57 +0000
Subject: [PATCH 17/25] Try using new volume

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 4d4f5d939e097..2c14502182bef 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -21,6 +21,7 @@ jobs:
     defaults:
       run:
         shell: bash
+        working-directory: C:\build
     steps:
       - name: Checkout LLVM
         uses: actions/checkout@v4

From d56623fce96d15e21d650e4e186e0debca5f2137 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 06:35:33 +0000
Subject: [PATCH 18/25] reset dir

---
 .github/workflows/premerge.yaml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 2c14502182bef..4d4f5d939e097 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -21,7 +21,6 @@ jobs:
     defaults:
       run:
         shell: bash
-        working-directory: C:\build
     steps:
       - name: Checkout LLVM
         uses: actions/checkout@v4

From 674d417a548c6b6c9f16c0223de71b912d8e0628 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:33:03 +0000
Subject: [PATCH 19/25] Readd Linux

---
 .github/workflows/premerge.yaml | 65 +++++++++++++++++++++++++++++++++
 llvm/CMakeLists.txt             |  1 -
 2 files changed, 65 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 4d4f5d939e097..888d28bf2174d 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -12,6 +12,65 @@ on:
       - 'main'
 
 jobs:
+  premerge-checks-linux:
+    if: github.repository_owner == 'llvm'
+    runs-on: llvm-premerge-linux-runners
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+      cancel-in-progress: true
+    steps:
+      - name: Checkout LLVM
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+      - name: Setup ccache
+        uses: hendrikmuhs/ccache-action@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: ${linux_runtime_check_targets}"
+
+          export CC=/opt/llvm/bin/clang
+          export CXX=/opt/llvm/bin/clang++
+
+          ./.ci/monolithic-linux.sh "$(echo ${linux_projects} | tr ' ' ';')" "$(echo ${linux_check_targets})" "$(echo ${linux_runtimes} | tr ' ' ';')" "$(echo ${linux_runtime_check_targets})"
+
   premerge-checks-windows:
     if: github.repository_owner == 'llvm'
     runs-on: llvm-premerge-windows-runners
@@ -59,6 +118,12 @@ jobs:
           echo "windows-projects=${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
         shell: cmd
         run: |
           set MAX_PARALLEL_COMPILE_JOBS=64
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 3ea8f6e17a638..01d2f0b9a5da3 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -1,5 +1,4 @@
 # See docs/CMake.html for instructions about how to build LLVM with CMake.
-# comment
 cmake_minimum_required(VERSION 3.20.0)
 
 include(CMakeDependentOption)

From f4dd685c5d34bd076bf72568b6e7fbbd04d75e21 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:34:06 +0000
Subject: [PATCH 20/25] Fix llvm changes

---
 llvm/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 01d2f0b9a5da3..ad12100fdb5b8 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -1,4 +1,5 @@
 # See docs/CMake.html for instructions about how to build LLVM with CMake.
+
 cmake_minimum_required(VERSION 3.20.0)
 
 include(CMakeDependentOption)

From 788f16011796a8d41ca273a1c65b75fb4e6f0fb2 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:34:28 +0000
Subject: [PATCH 21/25] bump cache size

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 888d28bf2174d..779128ba7e90d 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -89,6 +89,7 @@ jobs:
         uses: hendrikmuhs/ccache-action@v1.2.14
         with:
           variant: "sccache"
+          max-size: "2000M"
       - name: Compute Projects
         id: vars
         run: |

From 1390ec9db08a11346cb251974efbca6426c16c31 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:36:24 +0000
Subject: [PATCH 22/25] Add OS name to concurrency group

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 779128ba7e90d..e64ea67385254 100644
--- a/.github/workflows/premerge.yaml
+++ b/.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

From 557ba3d34cff9b8371db19f84175bf98b9e26f52 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:44:01 +0000
Subject: [PATCH 23/25] thing

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index e64ea67385254..deaf0480d618f 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -110,7 +110,6 @@ jobs:
 
           if [[ "${windows_projects}" == "" ]]; then
             echo "No projects to build"
-            exit 0
           fi
 
           echo "Building projects: ${windows_projects}"
@@ -125,6 +124,7 @@ jobs:
         # 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

From 777c2308c081dff023ff22a19d45d25f8cf5a518 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:46:20 +0000
Subject: [PATCH 24/25] try again

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index deaf0480d618f..7e42082e46105 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -124,7 +124,7 @@ jobs:
         # 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 == "" }}
+        if: ${{ steps.vars.outputs.windows-projects == '' }}
         shell: cmd
         run: |
           set MAX_PARALLEL_COMPILE_JOBS=64

From 418a3ba5db83c75e4660e9bb12bbf905b3dadf6f Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Sat, 25 Jan 2025 07:50:04 +0000
Subject: [PATCH 25/25] get working

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

diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 7e42082e46105..54d6e1bf092cf 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -124,7 +124,7 @@ jobs:
         # 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 == '' }}
+        if: ${{ steps.vars.outputs.windows-projects != '' }}
         shell: cmd
         run: |
           set MAX_PARALLEL_COMPILE_JOBS=64