[llvm] [SPIR-V] Add SPIRV to LLVM_ALL_TARGETS (reapply) (PR #123654)

[Michal Paszkowski via llvm-commits]

https://github.com/michalpaszkowski created https://github.com/llvm/llvm-project/pull/123654

This commit promotes the SPIR-V backend from experimental to official status. As a result, SPIR-V will be built by default, simplifying integration and increasing accessibility for downstream projects.

Discussion and RFC on Discourse: https://discourse.llvm.org/t/rfc-promoting-spir-v-to-an-official-target/83614

The PR reapplies the original patch https://github.com/llvm/llvm-project/pull/119653, reverted due to builedbot failures.

>From cfbe10886ab00d5b6d716e5a8970473d35a24b2a Mon Sep 17 00:00:00 2001
From: Michal Paszkowski <michal at michalpaszkowski.com>
Date: Mon, 20 Jan 2025 18:38:37 +0100
Subject: [PATCH] [SPIR-V] Add SPIRV to LLVM_ALL_TARGETS This commit promotes
 the SPIR-V backend from experimental to official status. As a result, SPIR-V
 will be built by default, simplifying integration and increasing
 accessibility for downstream projects.

Discussion and RFC on Discourse: https://discourse.llvm.org/t/rfc-promoting-spir-v-to-an-official-target/83614
---
 .github/workflows/spirv-tests.yml | 2 +-
 llvm/CMakeLists.txt               | 2 +-
 llvm/Maintainers.md               | 7 +++++--
 llvm/docs/ReleaseNotes.md         | 6 ++++++
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/spirv-tests.yml b/.github/workflows/spirv-tests.yml
index 34c77a398c1504..ea466dc6c52e57 100644
--- a/.github/workflows/spirv-tests.yml
+++ b/.github/workflows/spirv-tests.yml
@@ -25,5 +25,5 @@ jobs:
     with:
       build_target: check-llvm-codegen-spirv
       projects:
-      extra_cmake_args: '-DLLVM_TARGETS_TO_BUILD="" -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="SPIRV" -DLLVM_INCLUDE_SPIRV_TOOLS_TESTS=ON'
+      extra_cmake_args: '-DLLVM_TARGETS_TO_BUILD="SPIRV" -DLLVM_INCLUDE_SPIRV_TOOLS_TESTS=ON'
       os_list: '["ubuntu-22.04"]'
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index f14065ab037990..ad12100fdb5b89 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -486,6 +486,7 @@ set(LLVM_ALL_TARGETS
   PowerPC
   RISCV
   Sparc
+  SPIRV
   SystemZ
   VE
   WebAssembly
@@ -498,7 +499,6 @@ set(LLVM_ALL_EXPERIMENTAL_TARGETS
   CSKY
   DirectX
   M68k
-  SPIRV
   Xtensa
 )
 
diff --git a/llvm/Maintainers.md b/llvm/Maintainers.md
index 74dcc5abf5645e..2e995dc27dcd04 100644
--- a/llvm/Maintainers.md
+++ b/llvm/Maintainers.md
@@ -284,8 +284,11 @@ koachan at protonmail.com (email), [koachan](https://github.com/koachan) (GitHub)
 
 #### SPIRV backend
 
-Ilia Diachkov \
-ilia.diachkov at gmail.com (email), [iliya-diyachkov](https://github.com/iliya-diyachkov) (GitHub)
+Vyacheslav Levytskyy \
+vyacheslav.levytskyy at intel.com, vyacheslav.levytskyy at gmail.com (email), [VyacheslavLevytskyy](https://github.com/VyacheslavLevytskyy) (GitHub)
+
+Nathan Gauër \
+brioche at google.com (email), [Keenuts](https://github.com/Keenuts) (GitHub)
 
 #### SystemZ backend
 
diff --git a/llvm/docs/ReleaseNotes.md b/llvm/docs/ReleaseNotes.md
index 8f88b824f965aa..48f962d212e86d 100644
--- a/llvm/docs/ReleaseNotes.md
+++ b/llvm/docs/ReleaseNotes.md
@@ -47,6 +47,12 @@ for adding a new subsection. -->
   same semantics. The normalizer makes it easier to spot semantic differences
   when diffing two modules which have undergone different passes.
 
+* The SPIR-V backend is now an official LLVM target, providing OpenCL and SYCL
+  conformance and establishing a foundation for broader applicability to other
+  APIs, including Vulkan, GLSL, and HLSL. This backend aims to offer a unified
+  approach for diverse compute and graphics workloads, providing a robust
+  alternative to the Khronos SPIR-V LLVM Translator.
+
 * ...
 
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