[CI] Prepare release branch for LLVM 16 (#1861)

Author: svenvh

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

@@ -64,7 +64,7 @@ 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/focal/ llvm-toolchain-focal main" | sudo tee -a /etc/apt/sources.list
+        echo "deb https://apt.llvm.org/focal/ llvm-toolchain-focal-16 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

@@ -51,7 +51,7 @@ 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/focal/ llvm-toolchain-focal main" | sudo tee -a /etc/apt/sources.list
+          echo "deb https://apt.llvm.org/focal/ llvm-toolchain-focal-16 main" | sudo tee -a /etc/apt/sources.list
           echo "deb https://packages.lunarg.com/vulkan focal main" | sudo tee -a /etc/apt/sources.list
           sudo apt-get update
           sudo apt-get -yq --no-install-suggests --no-install-recommends install \
@@ -64,7 +64,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: llvm/llvm-project
-          ref: main
+          ref: release/16.x
           path: llvm-project
       - name:  Checkout the translator sources
         uses: actions/checkout@v2
@@ -119,7 +119,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: llvm/llvm-project
-          ref: main
+          ref: release/16.x
           path: llvm-project
       - name:  Checkout the translator sources
         uses: actions/checkout@v2
@@ -171,7 +171,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: llvm/llvm-project
-          ref: main
+          ref: release/16.x
           path: llvm-project
       - name:  Checkout the translator sources
         uses: actions/checkout@v2

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

@@ -44,7 +44,7 @@ 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/focal/ llvm-toolchain-focal main" | sudo tee -a /etc/apt/sources.list
+          echo "deb https://apt.llvm.org/focal/ llvm-toolchain-focal-16 main" | sudo tee -a /etc/apt/sources.list
           echo "deb https://packages.lunarg.com/vulkan focal 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 @@
 # LLVM/SPIR-V Bi-Directional Translator
 
-[![Out-of-tree build & tests](https://github.com/KhronosGroup/SPIRV-LLVM-Translator/workflows/Out-of-tree%20build%20&%20tests/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/workflows/In-tree%20build%20&%20tests/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/workflows/Out-of-tree%20build%20&%20tests/badge.svg?branch=llvm_release_160&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/workflows/In-tree%20build%20&%20tests/badge.svg?branch=llvm_release_160&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/).