Prepare release branch for LLVM 21.x (#3279)

Author: svenvh

.github/workflows/check-code-style.yml

@@ -79,7 +79,7 @@ jobs:
         # launched, so, we need to setup llvm package to perform cmake
         # configuration step to generate that database
         curl -L "https://apt.llvm.org/llvm-snapshot.gpg.key" | sudo apt-key add -
-        echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy main" | sudo tee -a /etc/apt/sources.list
+        echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-21 main" | sudo tee -a /etc/apt/sources.list
         sudo apt-get update
         sudo apt-get install -yqq \
             clang-format-${{ env.LLVM_VERSION }} clang-tidy-${{ env.LLVM_VERSION }} \

.github/workflows/check-in-tree-build.yml

@@ -69,7 +69,7 @@ jobs:
         run: |
           curl -L "https://apt.llvm.org/llvm-snapshot.gpg.key" | sudo apt-key add -
           curl -L "https://packages.lunarg.com/lunarg-signing-key-pub.asc" | sudo apt-key add -
-          echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy main" | sudo tee -a /etc/apt/sources.list
+          echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-21 main" | sudo tee -a /etc/apt/sources.list
           echo "deb https://packages.lunarg.com/vulkan jammy main" | sudo tee -a /etc/apt/sources.list
           sudo apt-get update
           sudo apt-get -yq --no-install-suggests --no-install-recommends install \
@@ -82,7 +82,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: llvm/llvm-project
-          ref: main
+          ref: release/21.x
           path: llvm-project
       - name:  Checkout the translator sources
         uses: actions/checkout@v4
@@ -137,7 +137,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: llvm/llvm-project
-          ref: main
+          ref: release/21.x
           path: llvm-project
       - name:  Checkout the translator sources
         uses: actions/checkout@v4
@@ -189,7 +189,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: llvm/llvm-project
-          ref: main
+          ref: release/21.x
           path: llvm-project
       - name:  Checkout the translator sources
         uses: actions/checkout@v4

.github/workflows/check-out-of-tree-build.yml

@@ -61,7 +61,7 @@ jobs:
         run: |
           curl -L "https://apt.llvm.org/llvm-snapshot.gpg.key" | sudo apt-key add -
           curl -L "https://packages.lunarg.com/lunarg-signing-key-pub.asc" | sudo apt-key add -
-          echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy main" | sudo tee -a /etc/apt/sources.list
+          echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-21 main" | sudo tee -a /etc/apt/sources.list
           echo "deb https://packages.lunarg.com/vulkan jammy main" | sudo tee -a /etc/apt/sources.list
           sudo apt-get update
           sudo apt-get -yq --no-install-suggests --no-install-recommends install \

.travis.yml

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.13.4)
 
 if(NOT DEFINED BASE_LLVM_VERSION)
-  set (BASE_LLVM_VERSION 21.0.0)
+  set (BASE_LLVM_VERSION 21.1.0)
 endif(NOT DEFINED BASE_LLVM_VERSION)
 set(LLVM_SPIRV_VERSION ${BASE_LLVM_VERSION}.0)
 

CMakeLists.txt

@@ -1,7 +1,7 @@
 # LLVM/SPIR-V Bi-Directional Translator
 
-[![Out-of-tree build & tests](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions/workflows/check-out-of-tree-build.yml/badge.svg?branch=main&event=schedule)](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions?query=workflow%3A%22Out-of-tree+build+%26+tests%22+event%3Aschedule)
-[![In-tree build & tests](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions/workflows/check-in-tree-build.yml/badge.svg?branch=main&event=schedule)](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions?query=workflow%3A%22In-tree+build+%26+tests%22+event%3Aschedule)
+[![Out-of-tree build & tests](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions/workflows/check-out-of-tree-build.yml/badge.svg?branch=llvm_release_210&event=schedule)](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions?query=workflow%3A%22Out-of-tree+build+%26+tests%22+event%3Aschedule)
+[![In-tree build & tests](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions/workflows/check-in-tree-build.yml/badge.svg?branch=llvm_release_210&event=schedule)](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/actions?query=workflow%3A%22In-tree+build+%26+tests%22+event%3Aschedule)
 
 This repository contains source code for the LLVM/SPIR-V Bi-Directional Translator, a library and tool for translation between LLVM IR and [SPIR-V](https://www.khronos.org/registry/spir-v/).
 This project currently only supports the OpenCL/compute "flavour" of SPIR-V: it consumes and produces SPIR-V modules that declare the `Kernel` capability.