CI: Bump LDC-LLVM to v20.1.5, and disable dynamic-compile feature by default with LLVM 20

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

@@ -23,7 +23,7 @@ runs:
 
         packages=( \
           git-core cmake g++ \
-          libcurl4 libxml2-dev libzstd-dev \
+          libcurl4 libzstd-dev \
           curl gdb p7zip-full tzdata unzip zip python3-pip \
         )
         if [[ $arch == x86_64 ]]; then
@@ -37,30 +37,30 @@ runs:
         # Make sure to link libzstd statically
         sudo rm /usr/lib/$arch-linux-gnu/libzstd.so
 
-    - name: 'Linux: Install clang 19 from apt.llvm.org'
+    - name: 'Linux: Install clang 20 from apt.llvm.org'
       if: runner.os == 'Linux'
       shell: bash
       run: |
         set -eux
         cd ..
         curl -fL --retry 3 --max-time 30 -O https://apt.llvm.org/llvm.sh
-        sudo bash llvm.sh 19
+        sudo bash llvm.sh 20
         for tool in clang clang++ ld.lld; do
-          sudo ln -sf $tool-19 /usr/bin/$tool
+          sudo ln -sf $tool-20 /usr/bin/$tool
           $tool --version
         done
-    - name: 'macOS arm64: Install Homebrew clang 19' # see mimalloc comment in ../3-build-native/action.yml
+    - name: 'macOS arm64: Install Homebrew clang 20' # see mimalloc comment in ../3-build-native/action.yml
       if: runner.os == 'macOS' && inputs.arch == 'arm64'
       shell: bash
-      run: brew install llvm@19
-    - name: 'Windows: Install clang v19.1.3 from GitHub'
+      run: brew install llvm@20
+    - name: 'Windows: Install clang v20.1.3 from GitHub'
       if: runner.os == 'Windows'
       shell: bash
       run: |
         set -eux
         cd ..
         curl -fL --retry 3 --max-time 300 -o clang.exe \
-          https://github.com/llvm/llvm-project/releases/download/llvmorg-19.1.3/LLVM-19.1.3-win64.exe
+          https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.3/LLVM-20.1.3-win64.exe
         ./clang.exe //S # double-slash for bash
         rm clang.exe
         # C:\Program Files\LLVM\bin should already be in PATH

.github/actions/3-build-cross/android-llvm-config.in

@@ -45,36 +45,36 @@ prefix=@LLVM_INSTALL_DIR@
 has_rtti=NO
 CPPFLAGS="-I${prefix}/include -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS"
 CFLAGS="${CPPFLAGS} ${CFLAGS}"
-CXXFLAGS="${CFLAGS} -std=c++17 -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables"
+CXXFLAGS="${CFLAGS} -std=c++17 -fno-exceptions -funwind-tables"
 if [ "$has_rtti" != "YES" ]; then CXXFLAGS="$CXXFLAGS -fno-rtti"; fi
 LDFLAGS="-L${prefix}/lib"
 LIBFILE="${prefix}/lib/libLLVM-$version.so"
 
 components="aarch64 aarch64asmparser aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils \
 aggressiveinstcombine all all-targets analysis arm armasmparser armcodegen armdesc armdisassembler arminfo armutils \
-asmparser asmprinter binaryformat bitreader bitstreamreader bitwriter cfguard codegen codegendata codegentypes core coroutines coverage \
+asmparser asmprinter binaryformat bitreader bitstreamreader bitwriter cfguard cgdata codegen codegentypes core coroutines coverage \
 debuginfobtf debuginfocodeview debuginfodwarf debuginfogsym debuginfologicalview debuginfomsf debuginfopdb demangle dlltooldriver dwarflinker dwarflinkerclassic dwarflinkerparallel dwp \
-engine executionengine extensions filecheck frontenddriver frontendhlsl frontendoffloading frontendopenacc frontendopenmp fuzzercli fuzzmutate globalisel hipstdpar instcombine \
+engine executionengine extensions filecheck frontendatomic frontenddriver frontendhlsl frontendoffloading frontendopenacc frontendopenmp fuzzercli fuzzmutate globalisel hipstdpar instcombine \
 instrumentation interfacestub interpreter ipo irprinter irreader jitlink libdriver lineeditor linker lto mc mca mcdisassembler \
 mcjit mcparser mirparser native nativecodegen objcarcopts objcopy object objectyaml option orcdebugging orcjit orcshared orctargetprocess \
-passes profiledata remarks runtimedyld sandboxir scalaropts selectiondag spirv spirvanalysis spirvcodegen spirvdesc spirvinfo support symbolize tablegen target targetparser textapi \
+passes profiledata remarks runtimedyld sandboxir scalaropts selectiondag spirv spirvanalysis spirvcodegen spirvdesc spirvinfo support symbolize tablegen target targetparser telemetry textapi \
 textapibinaryreader transformutils vectorize webassembly webassemblyasmparser webassemblycodegen webassemblydesc webassemblydisassembler \
 webassemblyinfo webassemblyutils windowsdriver windowsmanifest x86 x86asmparser x86codegen x86desc x86disassembler x86info \
 x86targetmca xray"
-static_libs="-lLLVMWindowsManifest -lLLVMXRay -lLLVMLibDriver -lLLVMDlltoolDriver -lLLVMTextAPIBinaryReader -lLLVMCoverage -lLLVMLineEditor \
--lLLVMSandboxIR -lLLVMSPIRVCodeGen -lLLVMSPIRVDesc -lLLVMSPIRVInfo -lLLVMSPIRVAnalysis \
--lLLVMX86TargetMCA -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMWebAssemblyDisassembler \
+static_libs="-lLLVMWindowsManifest -lLLVMXRay -lLLVMLibDriver -lLLVMDlltoolDriver -lLLVMTelemetry -lLLVMTextAPIBinaryReader -lLLVMCoverage -lLLVMLineEditor \
+-lLLVMX86TargetMCA -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info \
+-lLLVMSPIRVCodeGen -lLLVMSPIRVDesc -lLLVMSPIRVInfo -lLLVMSPIRVAnalysis -lLLVMWebAssemblyDisassembler \
 -lLLVMWebAssemblyAsmParser -lLLVMWebAssemblyCodeGen -lLLVMWebAssemblyUtils -lLLVMWebAssemblyDesc -lLLVMWebAssemblyInfo -lLLVMARMDisassembler \
 -lLLVMARMAsmParser -lLLVMARMCodeGen -lLLVMARMDesc -lLLVMARMUtils -lLLVMARMInfo -lLLVMAArch64Disassembler \
 -lLLVMAArch64AsmParser -lLLVMAArch64CodeGen -lLLVMAArch64Desc -lLLVMAArch64Utils -lLLVMAArch64Info -lLLVMOrcDebugging -lLLVMOrcJIT \
 -lLLVMWindowsDriver -lLLVMMCJIT -lLLVMJITLink -lLLVMInterpreter -lLLVMExecutionEngine -lLLVMRuntimeDyld -lLLVMOrcTargetProcess -lLLVMOrcShared \
 -lLLVMDWP -lLLVMDebugInfoLogicalView -lLLVMDebugInfoGSYM -lLLVMOption -lLLVMObjectYAML -lLLVMObjCopy -lLLVMMCA \
 -lLLVMMCDisassembler -lLLVMLTO -lLLVMPasses -lLLVMHipStdPar -lLLVMCFGuard -lLLVMCoroutines -lLLVMipo \
--lLLVMVectorize -lLLVMLinker -lLLVMInstrumentation -lLLVMFrontendOpenMP -lLLVMFrontendOffloading -lLLVMFrontendOpenACC -lLLVMFrontendHLSL -lLLVMFrontendDriver -lLLVMExtensions \
--lLLVMDWARFLinkerParallel -lLLVMDWARFLinkerClassic -lLLVMDWARFLinker -lLLVMCodeGenData -lLLVMGlobalISel -lLLVMMIRParser -lLLVMAsmPrinter -lLLVMSelectionDAG \
--lLLVMCodeGen -lLLVMTarget -lLLVMObjCARCOpts -lLLVMCodeGenTypes -lLLVMIRPrinter -lLLVMInterfaceStub -lLLVMFileCheck -lLLVMFuzzMutate \
+-lLLVMVectorize -lLLVMSandboxIR -lLLVMLinker -lLLVMInstrumentation -lLLVMFrontendOpenMP -lLLVMFrontendOffloading -lLLVMFrontendOpenACC -lLLVMFrontendHLSL -lLLVMFrontendDriver -lLLVMFrontendAtomic -lLLVMExtensions \
+-lLLVMDWARFLinkerParallel -lLLVMDWARFLinkerClassic -lLLVMDWARFLinker -lLLVMGlobalISel -lLLVMMIRParser -lLLVMAsmPrinter -lLLVMSelectionDAG \
+-lLLVMCodeGen -lLLVMTarget -lLLVMObjCARCOpts -lLLVMCodeGenTypes -lLLVMCGData -lLLVMIRPrinter -lLLVMInterfaceStub -lLLVMFileCheck -lLLVMFuzzMutate \
 -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis \
--lLLVMProfileData -lLLVMSymbolize -lLLVMDebugInfoBTF -lLLVMDebugInfoPDB -lLLVMDebugInfoMSF -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMIRReader -lLLVMAsmParser -lLLVMMC -lLLVMDebugInfoCodeView \
+-lLLVMProfileData -lLLVMSymbolize -lLLVMDebugInfoBTF -lLLVMDebugInfoPDB -lLLVMDebugInfoMSF -lLLVMDebugInfoCodeView -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMIRReader -lLLVMAsmParser -lLLVMMC \
 -lLLVMBitReader -lLLVMFuzzerCLI -lLLVMCore -lLLVMRemarks -lLLVMBitstreamReader -lLLVMBinaryFormat -lLLVMTargetParser -lLLVMTableGen -lLLVMSupport \
 -lLLVMDemangle"
 shared_libs="-lLLVM-$version"

.github/actions/6-integration-test/action.yml

@@ -45,8 +45,9 @@ runs:
       run: |
         set -eux
         cd ..
-        if type -P apk &>/dev/null; then
-          exit 0 # Alpine: disabled dynamic-compile support
+        if ! ls installed/lib/*ldc-jit-rt* &>/dev/null; then
+          echo "ldc-jit-rt library not found, skipping test"
+          exit 0
         fi
         if [[ '${{ runner.os }}' == Windows ]]; then
           # add ldc-jit.dll dir to PATH

.github/workflows/main.yml

@@ -14,7 +14,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  LLVM_VERSION: 19.1.7
+  LLVM_VERSION: 20.1.5
 
 jobs:
   build-native:
@@ -85,8 +85,8 @@ jobs:
             os: macos-14
             arch: arm64
             extra_cmake_flags: >-
-              -DCMAKE_C_COMPILER=/opt/homebrew/opt/llvm@19/bin/clang
-              -DCMAKE_CXX_COMPILER=/opt/homebrew/opt/llvm@19/bin/clang++
+              -DCMAKE_C_COMPILER=/opt/homebrew/opt/llvm@20/bin/clang
+              -DCMAKE_CXX_COMPILER=/opt/homebrew/opt/llvm@20/bin/clang++
               -DD_COMPILER_FLAGS="-O -flto=full -defaultlib=phobos2-ldc-lto,druntime-ldc-lto -L-exported_symbol '-L__*' -L-w"
               -DEXTRA_CXXFLAGS=-flto=full
             with_pgo: true

.github/workflows/supported_llvm_versions.yml

@@ -19,11 +19,16 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - job_name: Ubuntu 24.04, LLVM 19, latest LDC beta
+            os: ubuntu-24.04
+            host_dc: ldc-beta
+            llvm_version: 19
+            cmake_flags: -DRT_SUPPORT_SANITIZERS=ON
           - job_name: Ubuntu 24.04, LLVM 18, bootstrap LDC
             os: ubuntu-24.04
             host_dc: ldc-1.19.0
             llvm_version: 18
-            cmake_flags: -DRT_SUPPORT_SANITIZERS=ON -DPHOBOS_SYSTEM_ZLIB=ON
+            cmake_flags: -DBUILD_SHARED_LIBS=OFF -DPHOBOS_SYSTEM_ZLIB=ON
           - job_name: macOS 14, LLVM 17, latest LDC beta
             os: macos-14
             host_dc: ldc-beta

CHANGELOG.md

@@ -2,12 +2,15 @@
 
 #### Big news
 - Frontend, druntime and Phobos are at version [2.111.0+](https://dlang.org/changelog/2.111.0.html). (#4877, #4910, #4918)
+- Support for [LLVM 20](https://releases.llvm.org/20.1.0/docs/ReleaseNotes.html). The prebuilt packages use v20.1.5. (#4843, #4911, #4935)
+  - The dynamic-compile (JIT) feature has regressed with LLVM 20. Use LLVM 18 or 19 for that feature.
 - Keep frame pointers by default with `-O` for some targets, notably AArch64 (except Windows), x86_64 (except Windows and glibc Linux), Windows x86, and Android. This fixes druntime backtraces with optimized code (incl. prebuilt druntime/Phobos). (#4889)
 - The prebuilt (non-musl) Linux packages are now generated on Ubuntu 22.04; the minimum glibc version has accordingly been raised from v2.31 to v2.35. (#4893)
 - ldc2.conf: Arrays can now be appended to via the `~=` operator. (#4848, #4856)
 - New `--installWithSuffix` command-line option for the `ldc-build-runtime` tool, to simplify copying the libraries to an existing LDC installation. (#4870)
 
 #### Platform support
+- Supports LLVM 15 - 20.
 
 #### Bug fixes
 

CMakeLists.txt

@@ -457,8 +457,11 @@ option(LDC_DYNAMIC_COMPILE_USE_CUSTOM_PASSES "Use custom LDC passes in jit" ON)
 if(LDC_DYNAMIC_COMPILE STREQUAL "AUTO")
     if(LDC_LLVM_VER LESS 1800)
         set(LDC_DYNAMIC_COMPILE OFF)
-    else()
+    # FIXME: dynamic-compile regressions with LLVM 20
+    elseif(LDC_LLVM_VER LESS 2000)
         set(LDC_DYNAMIC_COMPILE ON)
+    else()
+        set(LDC_DYNAMIC_COMPILE OFF)
     endif()
 endif()
 # https://llvm.org/docs/JITLink.html for the list of supported platforms