Port Classic Flang changes to LLVM 16

.github/workflows/Ubuntu20Dockerfile

@@ -57,7 +57,7 @@ RUN if [ "$INITIAL_BUILD" != "true" ]; then \
     mkdir /home/root && cd home/root && \
     git clone --depth 1 --single-branch --branch $BRANCH_NAME https://github.com/flang-compiler/classic-flang-llvm-project.git classic-flang-llvm-project && \
     cd classic-flang-llvm-project && \
-    ./build-llvm-project.sh -t AArch64 -p /home/github/usr/local -n `nproc --ignore=1` -a /usr/bin/gcc-10 -b /usr/bin/g++-10 -i -v; \
+    ./build-llvm-project.sh -t AArch64 -p /home/github/usr/local -n `nproc --ignore=1` -a /usr/bin/gcc-10 -b /usr/bin/g++-10 -i -x "-DLLVM_ENABLE_ASSERTIONS=ON" -v; \
     fi
 
 RUN useradd github && \

.github/workflows/clang-tests.yml

@@ -3,18 +3,16 @@ name: Clang Tests
 on:
   workflow_dispatch:
   push:
-    ignore-forks: true
     branches:
-      - 'release/**'
+      - 'release_*x'
     paths:
       - 'clang/**'
       - '.github/workflows/clang-tests.yml'
       - '.github/workflows/llvm-project-tests.yml'
       - '!llvm/**'
   pull_request:
-    ignore-forks: true
     branches:
-      - 'release/**'
+      - 'release_*x'
     paths:
       - 'clang/**'
       - '.github/workflows/clang-tests.yml'
@@ -29,9 +27,9 @@ concurrency:
 
 jobs:
   check_clang:
-    if: github.repository_owner == 'llvm'
-    name: Test clang,lldb,libclc
+    if: github.repository_owner == 'flang-compiler'
+    name: Test clang
     uses: ./.github/workflows/llvm-project-tests.yml
     with:
       build_target: check-clang
-      projects: clang;lldb;libclc
+      projects: clang;openmp

.github/workflows/flang-arm64-tests.yml

@@ -0,0 +1,70 @@
+name: Build and test Flang
+
+on:
+  pull_request:
+    branches:
+      - 'release_*x'
+
+jobs:
+  build:
+    runs-on: self-hosted
+    env:
+      build_path: /home/github
+      install_prefix: /home/github/usr/local
+    container:
+      image: ghcr.io/${{ github.repository_owner}}/ubuntu20-flang-${{ github.base_ref }}:latest
+      credentials:
+        username: github
+    strategy:
+      matrix:
+        target: [AArch64]
+        cc: [clang]
+        cpp: [clang++]
+        version: [10, 11]
+        include:
+          - target: AArch64
+            cc: gcc
+            cpp: g++
+            version: 10
+
+    steps:
+      - name: Check tools
+        run: |
+          git --version
+          cmake --version
+          make --version
+          ${{ matrix.cc }}-${{ matrix.version }} --version
+          ${{ matrix.cpp }}-${{ matrix.version }} --version
+
+      - name: Manual checkout to build in user's home dir (pull_request)
+        run: |
+          cd ${{ env.build_path }}
+          git clone https://github.com/flang-compiler/classic-flang-llvm-project.git
+          cd classic-flang-llvm-project
+          git fetch origin ${{github.ref}}:pr_branch
+          git checkout pr_branch
+
+      - name: Build and install llvm
+        run: |
+          cd ${{ env.build_path }}/classic-flang-llvm-project
+          ./build-llvm-project.sh -t ${{ matrix.target }} -p ${{ env.install_prefix }} -a /usr/bin/${{ matrix.cc }}-${{ matrix.version }} -b /usr/bin/${{ matrix.cpp }}-${{ matrix.version }} -n $(nproc) -i -x "-DLLVM_ENABLE_ASSERTIONS=ON" -v
+
+      - name: Checkout flang
+        run: |
+          cd ${{ env.build_path }}
+          git clone --depth 1 --single-branch --branch master https://github.com/flang-compiler/flang.git
+
+      - name: Build and install libpgmath & flang
+        run: |
+          cd ${{ env.build_path }}/flang
+          ./build-flang.sh -t ${{ matrix.target }} -p ${{ env.install_prefix }} -n $(nproc) -l ${{ env.build_path }}/classic-flang-llvm-project/llvm
+
+      - name: Copy llvm-lit
+        run: |
+          cd ${{ env.build_path }}/flang
+          cp ${{ env.build_path }}/classic-flang-llvm-project/build/bin/llvm-lit build/flang/bin/
+
+      - name: Test flang
+        run: |
+          cd ${{ env.build_path }}/flang/build/flang
+          make check-all

.github/workflows/flang-tests.yml

@@ -0,0 +1,81 @@
+name: Build and test Flang
+
+on:
+  pull_request:
+    branches:
+      - 'release_*x'
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    env:
+      install_prefix: /usr/local
+    strategy:
+      matrix:
+        target: [X86]
+        cc: [clang]
+        cpp: [clang++]
+        version: [10, 11]
+        include:
+          - target: X86
+            cc: gcc
+            cpp: g++
+            version: 10
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - if: matrix.cc == 'clang'
+        run: |
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
+          sudo touch /etc/apt/sources.list.d/llvm.list
+          echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main' | sudo tee -a /etc/apt/sources.list.d/llvm.list
+          echo 'deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main'  | sudo tee -a /etc/apt/sources.list.d/llvm.list
+          wget -q -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
+          sudo apt update
+          sudo apt install -f -y llvm-${{ matrix.version }} clang-${{ matrix.version}}
+
+      - if: matrix.cc == 'gcc' && matrix.version == '10'
+        run: |
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
+          sudo apt install gcc-10 g++-10
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 10
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 20
+          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 10
+          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 20
+
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1
+        with:
+          key: key-${{ matrix.cc }}-${{ matrix.version }}
+
+      - name: Check tools
+        run: |
+          git --version
+          cmake --version
+          make --version
+          ${{ matrix.cc }}-${{ matrix.version }} --version
+          ${{ matrix.cpp }}-${{ matrix.version }} --version
+
+      - name: Build and install llvm
+        run: ./build-llvm-project.sh -t ${{ matrix.target }} -p ${{ env.install_prefix }} -a /usr/bin/${{ matrix.cc }}-${{ matrix.version }} -b /usr/bin/${{ matrix.cpp }}-${{ matrix.version }} -n $(nproc) -c -i -s -x "-DLLVM_ENABLE_ASSERTIONS=ON" -v
+
+      - name: Checkout flang
+        run: |
+          cd ../..
+          git clone --depth 1 --single-branch --branch master https://github.com/flang-compiler/flang.git
+
+      - name: Build and install libpgmath & flang
+        run: |
+          cd ../../flang
+          ./build-flang.sh -t ${{ matrix.target }} -p ${{ env.install_prefix }} -n $(nproc) -c -s -l $(realpath ../classic-flang-llvm-project/classic-flang-llvm-project/llvm)
+
+      - name: Copy llvm-lit
+        run: |
+          cd ../../flang
+          cp ../classic-flang-llvm-project/classic-flang-llvm-project/build/bin/llvm-lit build/flang/bin/
+
+      - name: Test flang
+        run: |
+          cd ../../flang/build/flang
+          make check-all