Switch to LLVM versions 20/21 as supported versions.

LLVM 21.1.0 has been released, so by our policy of supporting the two
most recent LLVM releases, we can now move from LLVM 19/20 to
LLVM 20/21.

Author: hvdijk

.github/README.md

@@ -20,9 +20,6 @@ create_llvm_artefacts.yml
 `Run planned testing`: planned_testing_caller.yml
 - description: runs planned_testing-style tests, called from an llvm version caller
 
-`run planned tests for llvm 19`: planned_testing_caller_19.yml
-- description: runs planned_tests for llvm 19
-
 `run planned tests for llvm 20`: planned_testing_caller_20.yml
 - description: runs planned_tests for llvm 20
 
@@ -60,8 +57,6 @@ create_llvm_artefacts.yml
 
 `CodeQL`: codeql.yml
 
-`run planned tests for llvm 19`: planned_testing_caller_19.yml
-
 `run planned tests for llvm 20`: planned_testing_caller_20.yml
 
 `run planned tests for llvm 21`: planned_testing_caller_21.yml
@@ -74,8 +69,6 @@ create_llvm_artefacts.yml
 
 ### `workflow_dispatch:` workflows (manually runnable and available in forks)
 
-`run planned tests for llvm 19`: planned_testing_caller_19.yml
-
 `run planned tests for llvm 20`: planned_testing_caller_20.yml
 
 `run planned tests for llvm 21`: planned_testing_caller_21.yml
@@ -114,7 +107,7 @@ The `publish docker images` workflow is configured to rebuild the containers whe
 
 ## LLVM artefact management
 
-Planned_testing workflows each use a particular llvm artefact according to llvm version, OS and architecture (e.g. llvm 19/20/21, Ubuntu_24, x86_64). The specific version to use and branch to reference are contained in the .yml workflow definition. llvm artefacts can be installed, built or accessed as pre-built artefacts from Github cache. They are handled as follows:
+Planned_testing workflows each use a particular llvm artefact according to llvm version, OS and architecture (e.g. llvm 20/21, Ubuntu_24, x86_64). The specific version to use and branch to reference are contained in the .yml workflow definition. llvm artefacts can be installed, built or accessed as pre-built artefacts from Github cache. They are handled as follows:
 - PR testing: llvm artefact is installed as needed.
 - Planned testing: a flag is set depending on whether the llvm version is stable. If the `use_llvm_github_cache` flag is set, cache is used with llvm artefact being built if required. If the flag is not set, the llvm artefact is always built.
 
@@ -153,11 +146,10 @@ Planned_testing workflows are configured to run via `workflow_dispatch:` (manual
 ### Further tailoring of planned_testing workflows
 The following planned_testing workflows call `Run planned testing` (planned_testing_caller.yml) as a sub-workflow:
 ```
-      run planned tests for llvm 19: planned_testing_caller_19.yml
       run planned tests for llvm 20: planned_testing_caller_20.yml
       run planned tests for llvm 21: planned_testing_caller_21.yml
 ```
-These workflows can be tailored to run specific llvm versions (e.g. 19), target lists (e.g. host_x86_64_linux) and test options (e.g. test_sanitizers), etc., by setting the scripted `inputs:` values to `Run planned testing` accordingly. See the planned_testing workflow .yml files for examples of current default values and tailoring options. With the exception of DPC++ PRs (see above) tailored values can only be set directly in workflow config and cannot currently be updated interactively on a per-run basis when called from the web interface (i.e. `workflow_dispatch:`).
+These workflows can be tailored to run specific llvm versions (e.g. 20), target lists (e.g. host_x86_64_linux) and test options (e.g. test_sanitizers), etc., by setting the scripted `inputs:` values to `Run planned testing` accordingly. See the planned_testing workflow .yml files for examples of current default values and tailoring options. With the exception of DPC++ PRs (see above) tailored values can only be set directly in workflow config and cannot currently be updated interactively on a per-run basis when called from the web interface (i.e. `workflow_dispatch:`).
 
 ### Planned_testing workflows in forks
 Planned_testing workflows can also be run via `workflow_dispatch:` (manual event trigger) in forks. Examples can be found [in this fork](https://github.com/AERO-Project-EU/oneapi-construction-kit/actions?query=event%3Aworkflow_dispatch).

.github/actions/do_build_llvm/action.yml

@@ -16,11 +16,11 @@ inputs:
     default: RelAssert
   llvm_version:
     type: string
-    description: llvm version - used for naming purposes e.g. 19,20,main"
+    description: llvm version - used for naming purposes e.g. 20,21,main"
     default: ""
   llvm_branch:
     type: string
-    description: "The actual llvm branch to check out e.g. release/19.x"
+    description: "The actual llvm branch to check out e.g. release/20.x"
   use_github_cache:
     type: boolean
     description: "Whether to use caching - will rebuild if not existing"

.github/actions/do_build_ock_artefact/action.yml

@@ -5,8 +5,8 @@ description: Action to build the oneapi-construction-kit as an artefact
 
 inputs:
   llvm_version:
-    description: 'llvm version we want to use (18-19)'
-    default: '19'
+    description: 'llvm version we want to use (20-21)'
+    default: '20'
   llvm_source:
       required: true
       description: 'source to get llvm from - one of install, cache or workflow id'

.github/actions/do_build_run_sanitizers/action.yml

@@ -11,7 +11,7 @@ inputs:
     type: string
     required: true
   llvm_branch:
-    description: 'The actual llvm branch to check out e.g. release/19.x'
+    description: 'The actual llvm branch to check out e.g. release/20.x'
     type: string
     required: true
 

.github/actions/run_opencl_cts/action.yml

@@ -10,7 +10,7 @@ inputs:
     description: 'quick | full'
     default: "quick"
   llvm_version:
-    description: 'llvm major version (e.g 19,20, main) - to be used for llvm specific fails'
+    description: 'llvm major version (e.g 20,21,main) - to be used for llvm specific fails'
     required: true
   split_index:
     description: "optional split index so this run can be done with different splits, current only 0 or 1"

.github/actions/run_sycl_cts/action.yml

@@ -8,7 +8,7 @@ inputs:
     description: '"opencl" or "native_cpu"'
     default: 'opencl'
   llvm_version:
-    description: 'llvm major version (e.g 19,20, main) - to be used for llvm specific fails'
+    description: 'llvm major version (e.g 20,21,main) - to be used for llvm specific fails'
     required: true
   split_index:
     description: "optional split index so this run can be done with different splits, current only 0 or 1"

.github/actions/setup_build/action.yml

@@ -9,7 +9,7 @@ inputs:
     description: 'llvm Build type (Release, RelAssert) - note we need to use RelAssert for the cache pattern matching'
     default: RelAssert
   llvm_version:
-    description: 'Major llvm version to use for fetching llvm cache e.g. 19'
+    description: 'Major llvm version to use for fetching llvm cache e.g. 20'
   ubuntu_version:
     description: 'Version of ubuntu used for cache retrieval and prerequisites'
     default: 22.04
@@ -104,7 +104,7 @@ runs:
       shell: pwsh
       env:
         # Map inputs.llvm_version to specific download release here.
-        LLVM_RELEASE: "${{ inputs.llvm_version == '20' && '20.1.2' || '19.1.7' }}"
+        LLVM_RELEASE: "${{ inputs.llvm_version == '21' && '21.1.0' || '20.1.8' }}"
       run: |
         Invoke-WebRequest https://github.com/llvm/llvm-project/releases/download/llvmorg-$env:LLVM_RELEASE/clang+llvm-$env:LLVM_RELEASE-x86_64-pc-windows-msvc.tar.xz -OutFile clang+llvm-$env:LLVM_RELEASE-x86_64-pc-windows-msvc.tar.xz
         7z x clang+llvm-$env:LLVM_RELEASE-x86_64-pc-windows-msvc.tar.xz -so | 7z x -si -ttar

.github/dockerfiles/Dockerfile_22.04-aarch64

@@ -10,8 +10,8 @@ RUN pip install cmakelint colorama lit
 RUN apt-get install --yes spirv-tools
 RUN apt-get install --yes wget gpg
 RUN wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor - | tee /usr/share/keyrings/llvm-archive-keyring.gpg >/dev/null
-RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-19 main' | tee /etc/apt/sources.list.d/llvm.list >/dev/null
-RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main' | tee -a /etc/apt/sources.list.d/llvm.list >/dev/null
+RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main' | tee /etc/apt/sources.list.d/llvm.list >/dev/null
+RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-21 main' | tee -a /etc/apt/sources.list.d/llvm.list >/dev/null
 
 RUN apt-get install --yes zstd
 RUN apt-get install --yes libhwloc-dev

.github/dockerfiles/Dockerfile_22.04-x86-64

@@ -13,8 +13,8 @@ RUN sed -i -e '/^deb /{h;s|deb |&[arch=amd64,i386] |p;g;s|deb http://[^ ]*|deb [
 
 # Add llvm repos
 RUN wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor - | tee /usr/share/keyrings/llvm-archive-keyring.gpg >/dev/null
-RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-19 main' | tee /etc/apt/sources.list.d/llvm.list >/dev/null
-RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main' | tee -a /etc/apt/sources.list.d/llvm.list >/dev/null
+RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main' | tee /etc/apt/sources.list.d/llvm.list >/dev/null
+RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/jammy/ llvm-toolchain-jammy-21 main' | tee -a /etc/apt/sources.list.d/llvm.list >/dev/null
 RUN apt-get update
 
 # Install minimum requirements

.github/dockerfiles/Dockerfile_24.04-x86-64

@@ -13,8 +13,8 @@ RUN sed -i -e '/^Types:/,/^Signed-By:/{/Types:/{h;d};H;/^Signed-By:/{g;s|$|\nArc
 RUN apt-get update
 
 RUN wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor - | tee /usr/share/keyrings/llvm-archive-keyring.gpg >/dev/null
-RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/noble/ llvm-toolchain-noble-19 main' | tee /etc/apt/sources.list.d/llvm.list >/dev/null
-RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/noble/ llvm-toolchain-noble-20 main' | tee -a /etc/apt/sources.list.d/llvm.list >/dev/null
+RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/noble/ llvm-toolchain-noble-20 main' | tee /etc/apt/sources.list.d/llvm.list >/dev/null
+RUN echo 'deb [signed-by=/usr/share/keyrings/llvm-archive-keyring.gpg] http://apt.llvm.org/noble/ llvm-toolchain-noble-21 main' | tee -a /etc/apt/sources.list.d/llvm.list >/dev/null
 RUN apt-get update
 
 # Install minimum requirements