[clang] [Clang][SYCL] Add AOT compilation support for Intel GPUs in clang-sycl-linker (PR #133194)

[Victor Lomuller via cfe-commits]

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+//===--- SYCL.h -------------------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_SYCL_H
+#define LLVM_CLANG_BASIC_SYCL_H
+
+#include "clang/Basic/Cuda.h"
+
+namespace llvm {
+class StringRef;
+template <unsigned InternalLen> class SmallString;
+} // namespace llvm
+
+namespace clang {
+// List of architectures (Intel CPUs and Intel GPUs)
+// that support SYCL offloading.
+enum class SYCLSupportedIntelArchs {
+  // Intel CPUs
+  UNKNOWN,
+  SKYLAKEAVX512,
+  COREAVX2,
+  COREI7AVX,
+  COREI7,
+  WESTMERE,
+  SANDYBRIDGE,
+  IVYBRIDGE,
+  BROADWELL,
+  COFFEELAKE,
+  ALDERLAKE,
+  SKYLAKE,
+  SKX,
+  CASCADELAKE,
+  ICELAKECLIENT,
+  ICELAKESERVER,
+  SAPPHIRERAPIDS,
+  GRANITERAPIDS,
+  // Intel GPUs
+  BDW,
+  SKL,
+  KBL,
+  CFL,
+  APL,
+  BXT,
+  GLK,
+  WHL,
+  AML,
+  CML,
+  ICLLP,
+  ICL,
+  EHL,
+  JSL,
+  TGLLP,
+  TGL,
+  RKL,
+  ADL_S,
+  RPL_S,
+  ADL_P,
+  ADL_N,
+  DG1,
+  ACM_G10,
+  DG2_G10,
+  ACM_G11,
+  DG2_G11,
+  ACM_G12,
+  DG2_G12,
+  PVC,
+  PVC_VG,
+  MTL_U,
+  MTL_S,
+  ARL_U,
+  ARL_S,
+  MTL_H,
+  ARL_H,
+  BMG_G21,
+  LNL_M,
+};
+
+// Check if the given Arch value is a Generic AMD GPU.
+// Currently GFX*_GENERIC AMD GPUs do not support SYCL offloading.
+// This list is used to filter out GFX*_GENERIC AMD GPUs in
+// `IsSYCLSupportedAMDGPUArch`.
+static inline bool IsAMDGenericGPUArch(OffloadArch Arch) {
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Naghasan wrote:

(purely FYI) I don't think this has been tested at all. AFAIK, generic version will prevent a few instructions from being used, so not totally a runtime thing and I can see a few potential issues with the builtin implementations in libclc (in the intel/llvm repo).

https://github.com/llvm/llvm-project/pull/133194