CI: Windows: Build LLVM and llvmpipe

We will eventually need to build our own LLVM on Windows in order to
build libclc and other bits which are required for the d3d12 build, as
well as to be able to test SPIR-V/OpenCL on llvmpipe.

Start doing this now, building into the base container, and exercise
this by building llvmpipe under Windows.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4946>

.gitlab-ci.yml

@@ -211,7 +211,7 @@ arm_test:
 
 .windows-docker-vs2019:
   variables:
-    WINDOWS_TAG: "2020-03-24"
+    WINDOWS_TAG: "2020-05-05-llvm"
     WINDOWS_IMAGE: "$CI_REGISTRY_IMAGE/windows/x64_build:$WINDOWS_TAG"
     WINDOWS_UPSTREAM_IMAGE: "$CI_REGISTRY/$FDO_UPSTREAM_REPO/windows/x64_build:$WINDOWS_TAG"
 
@@ -222,6 +222,7 @@ windows_build_vs2019:
   stage: container
   variables:
     GIT_STRATEGY: fetch # we do actually need the full repository though
+  timeout: 4h # LLVM takes ages
   tags:
     - windows
     - shell

.gitlab-ci/windows/mesa_build.ps1

@@ -6,7 +6,7 @@ Get-Date
 Write-Host "Compiling Mesa"
 $builddir = New-Item -ItemType Directory -Name "build"
 Push-Location $builddir.FullName
-cmd.exe /C "C:\BuildTools\Common7\Tools\VsDevCmd.bat -host_arch=amd64 -arch=amd64 && meson -Dgallium-drivers=swrast -Dbuild-tests=true .. && ninja test"
+cmd.exe /C 'C:\BuildTools\Common7\Tools\VsDevCmd.bat -host_arch=amd64 -arch=amd64 && meson --default-library=static --buildtype=release -Db_vscrt=mt --cmake-prefix-path="C:\llvm-10" --pkg-config-path="C:\llvm-10\lib\pkgconfig;C:\llvm-10\share\pkgconfig;C:\spirv-tools\lib\pkgconfig" -Dllvm=true -Dshared-llvm=false -Dgallium-drivers=swrast -Dbuild-tests=true && ninja test'
 $buildstatus = $?
 Pop-Location
 Remove-Item -Recurse -Path $builddir

.gitlab-ci/windows/mesa_deps.ps1

@@ -10,7 +10,7 @@ Write-Host "Installing Chocolatey packages"
 For ($i = 0; $i -lt 5; $i++) {
   choco install -y python3 --params="/InstallDir:C:\python3"
   $python_install = $?
-  choco install --allow-empty-checksums -y cmake git git-lfs ninja pkgconfiglite winflexbison
+  choco install --allow-empty-checksums -y cmake git git-lfs ninja pkgconfiglite winflexbison --installargs "ADD_CMAKE_TO_PATH=System"
   $other_install = $?
   $choco_installed = $other_install -and $python_install
   if ($choco_installed) {
@@ -25,8 +25,9 @@ if (!$choco_installed) {
 
 # Add Chocolatey's native install path
 Update-SessionEnvironment
-# Python adds itself to the system environment path, which doesn't get refreshed until we start a new shell
-$env:PATH = "C:\python3;C:\python3\scripts;$env:PATH"
+# Python and CMake add themselves to the system environment path, which doesn't get refreshed
+# until we start a new shell
+$env:PATH = "C:\python3;C:\python3\scripts;C:\Program Files\CMake\bin;$env:PATH"
 
 Start-Process -NoNewWindow -Wait git -ArgumentList 'config --global core.autocrlf false'
 
@@ -52,7 +53,33 @@ Invoke-WebRequest -Uri $msvc_2019_url -OutFile C:\vs_buildtools.exe
 Get-Date
 Write-Host "Installing Visual Studio 2019"
 Start-Process -NoNewWindow -Wait C:\vs_buildtools.exe -ArgumentList '--wait --quiet --norestart --nocache --installPath C:\BuildTools --add Microsoft.VisualStudio.Workload.VCTools --add Microsoft.VisualStudio.Workload.NativeDesktop --add Microsoft.VisualStudio.Component.VC.ATL --add Microsoft.VisualStudio.Component.VC.ATLMFC --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64 --add Microsoft.VisualStudio.Component.Graphics.Tools --add Microsoft.VisualStudio.Component.Windows10SDK.18362 --includeRecommended'
+if (!$?) {
+  Write-Host "Failed to install Visual Studio tools"
+  Exit 1
+}
 Remove-Item C:\vs_buildtools.exe -Force
 
+Get-Date
+Write-Host "Cloning LLVM 10.x"
+git clone -b release/10.x --depth=1 https://github.com/llvm/llvm-project llvm-project
+if (!$?) {
+  Write-Host "Failed to clone LLVM repository"
+  Exit 1
+}
+
+Get-Date
+# slightly convoluted syntax but avoids the CWD being under the PS filesystem meta-path
+$llvm_build = New-Item -ItemType Directory -Path ".\llvm-project" -Name "build"
+Push-Location -Path $llvm_build.FullName
+Write-Host "Compiling LLVM and Clang"
+cmd.exe /C 'C:\BuildTools\Common7\Tools\VsDevCmd.bat -host_arch=amd64 -arch=amd64 && cmake ../llvm -GNinja -DCMAKE_BUILD_TYPE=Release -DLLVM_USE_CRT_RELEASE=MT -DCMAKE_INSTALL_PREFIX="C:\llvm-10" -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_OPTIMIZED_TABLEGEN=TRUE -DLLVM_ENABLE_ASSERTIONS=TRUE -DLLVM_INCLUDE_UTILS=OFF -DLLVM_INCLUDE_RUNTIMES=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_INCLUDE_GO_TESTS=OFF -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_BUILD_LLVM_C_DYLIB=OFF -DLLVM_ENABLE_DIA_SDK=OFF -DCLANG_BUILD_TOOLS=ON && ninja -j4 install'
+$buildstatus = $?
+Pop-Location
+Remove-Item -Recurse -Path $llvm_build
+if (!$buildstatus) {
+  Write-Host "Failed to compile LLVM"
+  Exit 1
+}
+
 Get-Date
 Write-Host "Complete"