[clang] [llvm] [SPIRV] GPU intrinsics (PR #131190)

[Michal Paszkowski via llvm-commits]

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@@ -0,0 +1,501 @@
+//===- LowerGPUIntrinsic.cpp ----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Lower the llvm.gpu intrinsics to target specific code sequences.
+// Can be called from clang if building for a specific GPU or from the backend
+// as part of a SPIRV lowering pipeline. Initial pass can lower to amdgcn or
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michalpaszkowski wrote:

The problem is that SPIR-V in itself is an architecture (although a synthetic one) and the SPIR-V backend is what lowers LLVM IR to this architecture. There are proprietary SPIR-V consumers which are not LLVM-based. For this reason it might be unreasonable to expect those to accept `llvm.` calls and it would be good to plan early how the new `llvm.gpu` intrinsics would be handled in the SPIR-V backend case by case.

https://github.com/llvm/llvm-project/pull/131190