Aligned LLVM version in verification builds with current production.

Author: kkreczko

.github/workflows/build-IGC.yml

@@ -80,7 +80,7 @@ jobs:
       fail-fast: false
       matrix:
         ubuntu_version: [ '24.04' ]
-        llvm_ver: [ 14, 15, 16 ]
+        llvm_ver: [ 15 ]
 
     steps:
       - uses: actions/checkout@v3
@@ -127,7 +127,7 @@ jobs:
       fail-fast: false
       matrix:
         ubuntu_version: [ '24.04' ]
-        llvm_ver: [ 14, 15, 16 ]
+        llvm_ver: [ 15 ]
         compiler: [ gcc, clang ]
     steps:
       - uses: actions/checkout@v3

documentation/build_ubuntu.md

@@ -43,7 +43,7 @@ Also, depending on the Ubuntu release, SPIRV-LLVM-Translator available through a
 For **LLVM**, **LLD** and **Clang** packages please visit this [link](https://apt.llvm.org/) to download and install desired version.
 For `apt` package manager you can use this command:
 ```shell
-$ sudo apt-get install llvm-11 llvm-11-dev clang-11 liblld-11 liblld-11-dev libllvmspirvlib11 libllvmspirvlib-dev
+$ sudo apt-get install llvm-15 llvm-15-dev clang-15 liblld-15 liblld-15-dev libllvmspirvlib15 libllvmspirvlib-15-dev
 ```
 As of now **OpenCL Clang** is still needed to be built and installed manually. Sources are available [here](https://github.com/intel/opencl-clang). You can use out-of-tree build method with LLVM and Clang preinstalled.
 **VC Intrinsics** is a lightweight library that is built from sources with IGC and there is no package for it.
@@ -72,13 +72,13 @@ You can use following commands for setup:
 ```shell
 $ cd <workspace>
 $ git clone https://github.com/intel/vc-intrinsics vc-intrinsics
-$ git clone -b llvmorg-14.0.5 https://github.com/llvm/llvm-project llvm-project
-$ git clone -b ocl-open-140 https://github.com/intel/opencl-clang llvm-project/llvm/projects/opencl-clang
-$ git clone -b llvm_release_140 https://github.com/KhronosGroup/SPIRV-LLVM-Translator llvm-project/llvm/projects/llvm-spirv
+$ git clone -b llvmorg-15.0.7 https://github.com/llvm/llvm-project llvm-project
+$ git clone -b ocl-open-150 https://github.com/intel/opencl-clang llvm-project/llvm/projects/opencl-clang
+$ git clone -b llvm_release_150 https://github.com/KhronosGroup/SPIRV-LLVM-Translator llvm-project/llvm/projects/llvm-spirv
 $ git clone https://github.com/KhronosGroup/SPIRV-Tools.git SPIRV-Tools
 $ git clone https://github.com/KhronosGroup/SPIRV-Headers.git SPIRV-Headers
 ```
-These commands will set up a workspace with LLVM 14. If you wish to use any other version please refer to the [component revision table](#Revision-table)
+These commands will set up a workspace with LLVM 15. If you wish to use any other version please refer to the [component revision table](#Revision-table)
 
 Correct directory tree looks like this:
 ```
@@ -100,7 +100,7 @@ There are several flags for these builds modes that you can pass to
 cmake command.
 
 - `IGC_OPTION__LLVM_PREFERRED_VERSION` -- sets version of LLVM that
-  will be used by IGC (defaults to "14.0.5").
+  will be used by IGC (defaults to "15.0.7").
 - `IGC_OPTION__LLVM_MODE` -- select LLVM mode for IGC to use. Possible
 values are: **Source**, **Prebuilds** or empty (that is
 default). **Source** mode uses LLVM sources to build LLVM in-tree with
@@ -173,9 +173,9 @@ Also note that these tests require **Debug** IGC build.
 
 | Version          | Product quality |
 |:----------------:|-----------------|
-| LLVM 15          | Experimental    |
-| LLVM 14          | **Production**  |
-| LLVM 12 and older | Experimental    |
+| LLVM 16          |  Experimental    |
+| LLVM 15          | **Production**   |
+| LLVM 14 and older| Experimental     |
 
 | Terminology       | Description |
 |-------------------|-|
@@ -187,14 +187,14 @@ Also note that these tests require **Debug** IGC build.
 LLVM version determines what branches are used when building dependencies.
 When checking out the components refer to the following table, replace **XX** with the LLVM version used:
 
-| Repository name       | Version specific | Branch               | LLVM 14 example  |
+| Repository name       | Version specific | Branch               | LLVM 15 example  |
 |-----------------------|:----------------:|----------------------|------------------|
-| llvm-project          | -                | release/**XX**.x     | release/14.x     |
+| llvm-project          | -                | release/**XX**.x     | release/15.x     |
 | vc-intrinsics         | no               | master               | master           |
 | SPIRV-Tools           | no               | master               | master           |
 | SPIRV-Headers         | no               | master               | master           |
-| SPIRV-LLVM-Translator | yes              | llvm_release_**XX**0 | llvm_release_140 |
-| opencl-clang          | yes              | ocl-open-**XX**0     | ocl-open-140     |
+| SPIRV-LLVM-Translator | yes              | llvm_release_**XX**0 | llvm_release_150 |
+| opencl-clang          | yes              | ocl-open-**XX**0     | ocl-open-150     |
 
 ### LLVM/LLD/Clang version specific caveats
 
@@ -230,9 +230,14 @@ There are no LLVM12-13/Clang12-13 conformance/performance guarantees.
 
 #### LLVM14/Clang14
 
-No additional steps are needed.
+**Experimental**
+There are no LLVM14/Clang14 conformance/performance guarantees.
 
 #### LLVM15/Clang15
 
+No additional steps are needed.
+
+#### LLVM16/Clang16
+
 **Experimental**
-There are no LLVM15/Clang15 conformance/performance guarantees.
+There are no LLVM16/Clang16 conformance/performance guarantees.