CI: Bump LDC-LLVM to v18.1.3 (except for Android and macOS arm64)

.cirrus.yml

@@ -210,7 +210,7 @@ install_ubuntu_prerequisites_template: &INSTALL_UBUNTU_PREREQUISITES_TEMPLATE
 environment:
   CIRRUS_CLONE_DEPTH: 50
   HOST_LDC_VERSION: 1.31.0
-  LLVM_VERSION: 17.0.6
+  LLVM_VERSION: 18.1.3
   GITHUB_TOKEN: ENCRYPTED[0955bd48c8d4e5391446fc0149d0719ad0b63df27ec9e6c180a5730a5b10dc7f28f09d1383423db158d21380ee2b022a]
 
 task:
@@ -248,7 +248,7 @@ task:
   environment:
     CI_ARCH: aarch64
     CI_OS: linux
-    EXTRA_APT_PACKAGES: libxml2-dev p7zip-full
+    EXTRA_APT_PACKAGES: libxml2-dev libzstd-dev p7zip-full
     EXTRA_CMAKE_FLAGS: >-
       -DBUILD_LTO_LIBS=ON
       -DD_COMPILER_FLAGS="-O -flto=full -defaultlib=phobos2-ldc-lto,druntime-ldc-lto"
@@ -282,6 +282,8 @@ task:
     # Make lld the default linker (likely with enabled assertions unfortunately)
     ln -sf "$PWD/llvm/bin/ld.lld" /usr/bin/ld
     ld --version
+    # Make sure to link libzstd statically
+    rm /usr/lib/aarch64-linux-gnu/libzstd.so
   # Download & extract clang
   download_prebuilt_clang_script: |
     cd $CIRRUS_WORKING_DIR/..

.github/actions/1-setup/action.yml

@@ -21,8 +21,10 @@ runs:
         # Don't use latest gdb v10+ from Ubuntu toolchain PPA with regressions, use official v9
         sudo apt-get -yq install \
           git-core cmake g++-multilib \
-          libcurl4 libcurl4:i386 \
+          libcurl4 libcurl4:i386 libzstd-dev \
           curl gdb=9.1-0ubuntu1 p7zip-full tzdata unzip zip python3-pip
+        # Make sure to link libzstd statically
+        sudo rm /usr/lib/x86_64-linux-gnu/libzstd.so
 
     - name: 'Linux: Download & extract clang' # into ../clang
       if: runner.os == 'Linux'

.github/workflows/main.yml

@@ -11,7 +11,7 @@ concurrency:
 
 env:
   CLANG_VERSION: 15.0.6
-  LLVM_VERSION: 17.0.6
+  LLVM_VERSION: 18.1.3
 
 jobs:
   build-native:
@@ -37,7 +37,7 @@ jobs:
             with_pgo: true
 
           - job_name: macOS x86_64
-            os: macos-11
+            os: macos-12
             arch: x86_64
             bootstrap_cmake_flags: >-
               -DBUILD_LTO_LIBS=ON
@@ -85,7 +85,7 @@ jobs:
       - name: Install prerequisites
         uses: ./.github/actions/1-setup
         with:
-          clang_version: ${{ runner.os == 'Windows' && '16.0.6' || env.CLANG_VERSION }}
+          clang_version: ${{ runner.os == 'Windows' && '18.1.3' || env.CLANG_VERSION }}
           llvm_version: ${{ env.LLVM_VERSION }}
           arch: ${{ matrix.arch }}
       - name: Build bootstrap LDC
@@ -192,6 +192,7 @@ jobs:
     timeout-minutes: 60
     env:
       MACOSX_DEPLOYMENT_TARGET: 11.0
+      LLVM_VERSION: 17.0.6 # TODO
     steps:
       - uses: actions/checkout@v4
         with:

.github/workflows/supported_llvm_versions.yml

@@ -18,7 +18,8 @@ jobs:
           - job_name: Ubuntu 20.04, LDC-LLVM 18, latest LDC beta
             os: ubuntu-20.04
             host_dc: ldc-beta
-            llvm_version: bfcdb95c # FIXME: no usable official package available yet
+            # FIXME: no usable official package available yet
+            llvm_version: https://github.com/ldc-developers/llvm-project/releases/download/ldc-v18.1.3/llvm-18.1.3-linux-x86_64.tar.xz
           - job_name: macOS 14, LLVM 17, latest LDC beta
             os: macos-14
             host_dc: ldc-beta
@@ -81,13 +82,13 @@ jobs:
             python3 -m pip install --user lit
           fi
           python3 -c "import lit.main; lit.main.main();" --version . | head -n 1
-      - name: 'Linux: Install gdb and llvm-symbolizer'
+      - name: 'Linux: Install gdb, llvm-symbolizer and libzstd'
         if: runner.os == 'Linux'
         run: |
           set -eux
           sudo apt-get update
           # Don't use latest gdb v10+ from Ubuntu toolchain PPA with regressions, use official v9
-          sudo apt-get install gdb=9.1-0ubuntu1 llvm
+          sudo apt-get install gdb=9.1-0ubuntu1 llvm libzstd-dev
 
       - name: Try to restore cached LLVM
         uses: actions/cache@v3
@@ -102,29 +103,26 @@ jobs:
             echo "Already cached"
             exit 0
           fi
+
           version='${{ matrix.llvm_version }}'
-          if [[ '${{ runner.os }}' == macOS ]]; then
-            if [[ "$version" =~ ^1[6-9]\. ]]; then
-              suffix='arm64-apple-darwin22.0'
+          if [[ "$version" =~ ^https:// ]]; then
+            url="$version"
+          else
+            if [[ '${{ runner.os }}' == macOS ]]; then
+              if [[ "$version" =~ ^1[6-9]\. ]]; then
+                suffix='arm64-apple-darwin22.0'
+              else
+                suffix='x86_64-apple-darwin'
+              fi
+            elif [[ "$version" =~ ^1[7-9]\. ]]; then
+              suffix='x86_64-linux-gnu-ubuntu-22.04' # LLVM 17+
+            elif [[ "$version" =~ ^1[3-6]\. ]]; then
+              suffix='x86_64-linux-gnu-ubuntu-18.04' # LLVM 13.0.1+
             else
-              suffix='x86_64-apple-darwin'
+              suffix='x86_64-linux-gnu-ubuntu-16.04'
             fi
-          elif [[ "$version" =~ ^1[7-9]\. ]]; then
-            suffix='x86_64-linux-gnu-ubuntu-22.04' # LLVM 17+
-          elif [[ "$version" =~ ^1[3-6]\. ]]; then
-            suffix='x86_64-linux-gnu-ubuntu-18.04' # LLVM 13.0.1+
-          else
-            suffix='x86_64-linux-gnu-ubuntu-16.04'
-          fi
-          if [[ "$version" = *.* ]]; then
+
             url="https://github.com/llvm/llvm-project/releases/download/llvmorg-$version/clang+llvm-$version-$suffix.tar.xz"
-          else # short commit SHA of ldc-developers fork
-            if [[ '${{ runner.os }}' == Linux ]]; then
-              suffix='linux-x86_64'
-            elif [[ '${{ runner.os }}' == macOS ]]; then
-              suffix='osx-arm64'
-            fi
-            url="https://github.com/ldc-developers/llvm-project/releases/download/CI/llvm-$version-$suffix.tar.xz"
           fi
 
           curl -fL --retry 3 --max-time 300 -o llvm.tar.xz "$url"

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 #### Big news
 - Frontend, druntime and Phobos are at version [2.108.0](https://dlang.org/changelog/2.108.0.html). (#4591, #4615)
-- Preliminary support for LLVM 18. (#4599, #4605, #4607)
+- Support for [LLVM 18](https://releases.llvm.org/18.1.0/docs/ReleaseNotes.html). The prebuilt packages use v18.1.3 (except for Android and macOS arm64). (#4599, #4605, #4607, #4604)
 
 #### Platform support
 - Supports LLVM 11 - 18.

runtime/druntime/src/rt/msvc.d

@@ -76,9 +76,15 @@ version (LDC)
     // The MinGW-w64 libs don't provide _(_)chkstk; fall back to the
     // implementation in LLVM's builtins compiler-rt lib.
     version (X86_64)
+    {
         mixin declareAlternateName!("__chkstk", "___chkstk_ms");
+    }
     else
-        mixin declareAlternateName!("_chkstk", "__chkstk"); // `__chkstk_ms` isn't the MS-compatible one!
+    {
+        // `_chkstk` and `_alloca` are the same function (and `__chkstk_ms`
+        // isn't the MS-compatible one!); LLVM 18 dropped the `__chkstk` alias
+        mixin declareAlternateName!("_chkstk", "_alloca");
+    }
 }
 else // !LDC
 {

tests/codegen/dcompute_cl_addrspaces_new.d

@@ -1,5 +1,8 @@
 // See GH issue #2709
 
+// FIXME: hits an assertion for LLVM 18: https://github.com/llvm/llvm-project/issues/87315
+// UNSUPPORTED: atleast_llvm1800 && atmost_llvm1809
+
 // REQUIRES: target_SPIRV && atleast_llvm1600
 // RUN: %ldc -c -opaque-pointers -mdcompute-targets=ocl-220 -m64 -mdcompute-file-prefix=addrspace_new -output-ll -output-o %s && FileCheck %s --check-prefix=LL < addrspace_new_ocl220_64.ll \
 // RUN: && %llc addrspace_new_ocl220_64.ll -mtriple=spirv64-unknown-unknown -O0 -o - | FileCheck %s --check-prefix=SPT

tests/codegen/dcompute_cl_images.d

@@ -3,6 +3,9 @@
 // FIXME: hits an assertion with SPIRV-LLVM-Translator for LLVM 15, see https://github.com/ldc-developers/ldc/pull/4010#issuecomment-1191820165
 // XFAIL: atleast_llvm1500 && atmost_llvm1509
 
+// FIXME: another assertion for LLVM 18: https://github.com/llvm/llvm-project/issues/87315
+// UNSUPPORTED: atleast_llvm1800 && atmost_llvm1809
+
 // RUN: %ldc -c -mdcompute-targets=ocl-220 -m64 -I%S/inputs -mdcompute-file-prefix=%t -output-ll -output-o %s && FileCheck %s < %t_ocl220_64.ll
 @compute(CompileFor.deviceOnly) module dcompute_cl_images;
 import ldc.dcompute;