Update to LLVM 20 in CI.

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
         usesh: true
         copyback: false
         prepare: |
-          pkg install -y gmake git bash python3 libxml2 llvm17
+          pkg install -y gmake git bash python3 libxml2 llvm20
         run: |
           # `set -e` is needed for test failures to register. https://github.com/vmactions/freebsd-vm/issues/72
           set -e -x
@@ -87,20 +87,20 @@ jobs:
         run: |
           wget https://apt.llvm.org/llvm.sh
           chmod +x llvm.sh
-          sudo ./llvm.sh 17
-          echo "/usr/lib/llvm-17/bin" >> $GITHUB_PATH
+          sudo ./llvm.sh 20
+          echo "/usr/lib/llvm-20/bin" >> $GITHUB_PATH
 
       - name: Download LLVM (MacOS Intel)
         if: matrix.os == 'macos-13'
         run: |
-          brew install llvm@17 [email protected]
-          echo "/usr/local/opt/llvm@17/bin" >> $GITHUB_PATH
+          brew install llvm@20 [email protected]
+          echo "/usr/local/opt/llvm@20/bin" >> $GITHUB_PATH
 
       - name: Download LLVM (MacOS ARM)
         if: matrix.os == 'macos-14'
         run: |
-          brew install llvm@17 wasmtime [email protected]
-          echo "/opt/homebrew/opt/llvm@17/bin" >> $GITHUB_PATH
+          brew install llvm@20 wasmtime [email protected]
+          echo "/opt/homebrew/opt/llvm@20/bin" >> $GITHUB_PATH
 
       - name: Build Odin
         run: ./build_odin.sh release
@@ -272,8 +272,8 @@ jobs:
         run: |
           wget https://apt.llvm.org/llvm.sh
           chmod +x llvm.sh
-          sudo ./llvm.sh 18
-          echo "/usr/lib/llvm-18/bin" >> $GITHUB_PATH
+          sudo ./llvm.sh 20
+          echo "/usr/lib/llvm-20/bin" >> $GITHUB_PATH
 
       - name: Build Odin
         run: ./build_odin.sh release

.github/workflows/nightly.yml

@@ -53,8 +53,8 @@ jobs:
       - name: (Linux) Download LLVM
         run: |
           apk add --no-cache \
-          musl-dev llvm18-dev clang18 git mold lz4 \
-          libxml2-static llvm18-static zlib-static zstd-static \
+          musl-dev llvm20-dev clang20 git mold lz4 \
+          libxml2-static llvm20-static zlib-static zstd-static \
           make
         shell: alpine.sh --root {0}
       - name: build odin
@@ -93,8 +93,8 @@ jobs:
       - uses: actions/checkout@v4
       - name: Download LLVM and setup PATH
         run: |
-          brew install llvm@18 dylibbundler
-          echo "/usr/local/opt/llvm@18/bin" >> $GITHUB_PATH
+          brew install llvm@20 dylibbundler
+          echo "/usr/local/opt/llvm@20/bin" >> $GITHUB_PATH
       - name: build odin
         # These -L makes the linker prioritize system libraries over LLVM libraries, this is mainly to
         # not link with libunwind bundled with LLVM but link with libunwind on the system.
@@ -130,8 +130,8 @@ jobs:
       - uses: actions/checkout@v4
       - name: Download LLVM and setup PATH
         run: |
-          brew install llvm@18 dylibbundler
-          echo "/opt/homebrew/opt/llvm@18/bin" >> $GITHUB_PATH
+          brew install llvm@20 dylibbundler
+          echo "/opt/homebrew/opt/llvm@20/bin" >> $GITHUB_PATH
       - name: build odin
         # These -L makes the linker prioritize system libraries over LLVM libraries, this is mainly to
         # not link with libunwind bundled with LLVM but link with libunwind on the system.