Bug 1913646 - Add win64-aarch64-clang-18 task r=firefox-build-system-reviewers,sergesanspaille

For now this uses Linux x64 profile for PGO as the macosx64-aarch64 task does, because we don't have aarch64 Windows worker now.

Differential Revision: https://phabricator.services.mozilla.com/D219012

build/build-clang/build-clang.py

@@ -25,6 +25,7 @@ import zstandard
 SUPPORTED_TARGETS = {
     "x86_64-unknown-linux-gnu": ("Linux", "x86_64"),
     "x86_64-pc-windows-msvc": ("Windows", "AMD64"),
+    "aarch64-pc-windows-msvc": ("Windows", "ARM64"),
     "x86_64-apple-darwin": ("Darwin", "x86_64"),
     "aarch64-apple-darwin": ("Darwin", "arm64"),
 }
@@ -624,6 +625,9 @@ def main():
         exe_ext = ".exe"
         cc_name = "clang-cl"
         cxx_name = "clang-cl"
+
+        # Used by llvm/lib/DebugInfo/PDB
+        os.environ["VSCMD_ARG_TGT_ARCH"] = SUPPORTED_TARGETS[target][1].lower()
     else:
         exe_ext = ""
         cc_name = "clang"

build/build-clang/skip-3-stages-win64.json

@@ -0,0 +1,7 @@
+{
+    "skip_stages": "3",
+    "cc": "{MOZ_FETCHES_DIR}/clang/bin/clang-cl",
+    "cxx": "{MOZ_FETCHES_DIR}/clang/bin/clang-cl",
+    "ml": "{MOZ_FETCHES_DIR}/clang/bin/clang-cl",
+    "lib": "{MOZ_FETCHES_DIR}/clang/bin/llvm-lib"
+}

build/build-clang/win64-aarch64.json

@@ -0,0 +1,3 @@
+{
+  "target": "aarch64-pc-windows-msvc"
+}

taskcluster/kinds/toolchain/clang.yml

@@ -513,6 +513,71 @@ win64-clang-18:
             - win64-compiler-rt-18
             - win64-aarch64-compiler-rt-18
 
+win64-aarch64-clang-18-raw:
+    description: "Clang-cl 18 toolchain build"
+    treeherder:
+        symbol: TW64(clang-18-aarch64-raw)
+    worker:
+        max-run-time: 3600
+    run:
+        script: build-clang.sh
+        arguments:
+            - 'build/build-clang/win64.json'
+            - 'build/build-clang/win64-aarch64.json'
+            - 'build/build-clang/clang-18.json'
+            - 'build/build-clang/skip-3-stages-win64.json'
+            - 'build/build-clang/4stages-pgo.json'
+        resources:
+            - 'build/build-clang/win64.json'
+            - 'build/build-clang/win64-aarch64.json'
+            - 'build/build-clang/clang-18.json'
+            - 'build/build-clang/skip-3-stages-win64.json'
+            - 'build/build-clang/4stages-pgo.json'
+        toolchain-artifact: public/build/clang.tar.zst
+    fetches:
+        fetch:
+            - clang-18
+        toolchain:
+            - linux64-clang-18-stage1
+            - linux64-clang-18-profile
+            - win64-aarch64-compiler-rt-18
+            - vs-toolchain
+            - win64-aarch64-libxml2
+
+win64-aarch64-clang-18:
+    description: "Clang-cl 18 toolchain build"
+    attributes:
+        local-toolchain: true
+    treeherder:
+        symbol: TW64(clang-18-aarch64)
+    worker-type: b-linux-gcp
+    worker:
+        max-run-time: 600
+    run:
+        script: repack-clang.sh
+        toolchain-artifact: public/build/clang.tar.zst
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - win64-aarch64-clang-18-raw
+            - android-aarch64-compiler-rt-18
+            - android-aarch64-libunwind-18
+            - android-arm-compiler-rt-18
+            - android-arm-libunwind-18
+            - android-x64-compiler-rt-18
+            - android-x64-libunwind-18
+            - android-x86-compiler-rt-18
+            - android-x86-libunwind-18
+            - linux64-aarch64-compiler-rt-18
+            - linux64-x64-compiler-rt-18
+            - linux64-x86-compiler-rt-18
+            - macosx64-aarch64-compiler-rt-18
+            - macosx64-x64-compiler-rt-18
+            - wasm32-wasi-compiler-rt-18
+            - win32-compiler-rt-18
+            - win64-compiler-rt-18
+            - win64-aarch64-compiler-rt-18
+
 linux64-clang-trunk-mingw-x86:
     description: "MinGW-Clang trunk x86 toolchain build"
     attributes:

taskcluster/kinds/toolchain/misc.yml

@@ -574,6 +574,22 @@ win64-libxml2:
         symbol: TW64(libxml2)
     run:
         script: build-libxml2.sh
+        arguments: ['x86_64-pc-windows-msvc']
+        toolchain-artifact: public/build/libxml2.tar.zst
+    fetches:
+        fetch:
+            - libxml2
+        toolchain:
+            - linux64-clang-toolchain
+            - vs-toolchain
+
+win64-aarch64-libxml2:
+    description: "libxml2 toolchain build"
+    treeherder:
+        symbol: TW64(libxml2-aarch64)
+    run:
+        script: build-libxml2.sh
+        arguments: ['aarch64-pc-windows-msvc']
         toolchain-artifact: public/build/libxml2.tar.zst
     fetches:
         fetch:

taskcluster/scripts/misc/build-libxml2.sh

@@ -7,6 +7,8 @@ cd $MOZ_FETCHES_DIR/libxml2
 
 export PATH="$MOZ_FETCHES_DIR/clang/bin:$PATH"
 
+TARGET=${1?"First argument must be a valid value for CMAKE_C_COMPILER_TARGET"}
+
 # Building the .rc file requires some extra work, but we don't
 # actually need it, so just remove its creation.
 sed -i /libxml2\\.rc/d CMakeLists.txt
@@ -16,6 +18,7 @@ cmake \
   -DCMAKE_BUILD_TYPE=Release \
   -DBUILD_SHARED_LIBS=Off \
   -DCMAKE_C_COMPILER=clang-cl \
+  -DCMAKE_C_COMPILER_TARGET=$TARGET \
   -DCMAKE_LINKER=lld-link \
   -DCMAKE_MT=llvm-mt \
   -DCMAKE_C_FLAGS="-fuse-ld=lld -Xclang -ivfsoverlay -Xclang $MOZ_FETCHES_DIR/vs/overlay.yaml -winsysroot $MOZ_FETCHES_DIR/vs" \