[clang] [SYCL] Basic code generation for SYCL kernel caller offload entry point functions. (PR #133030)

[Erich Keane via cfe-commits]

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@@ -0,0 +1,73 @@
+//===--------- CodeGenSYCL.cpp - Code for SYCL kernel generation ----------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This contains code required for generation of SYCL kernel caller offload
+// entry point functions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CodeGenFunction.h"
+#include "CodeGenModule.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+static void SetSYCLKernelAttributes(llvm::Function *Fn, CodeGenFunction &CGF) {
+  // SYCL 2020 device language restrictions require forward progress and
+  // disallow recursion.
+  Fn->setDoesNotRecurse();
+  if (CGF.checkIfFunctionMustProgress())
+    Fn->addFnAttr(llvm::Attribute::MustProgress);
+}
+
+void CodeGenModule::EmitSYCLKernelCaller(const FunctionDecl *KernelEntryPointFn,
+                                         ASTContext &Ctx) {
+  assert(Ctx.getLangOpts().SYCLIsDevice &&
+         "SYCL kernel caller offload entry point functions can only be emitted"
+         " during device compilation");
+
+  const auto *KernelEntryPointAttr =
+      KernelEntryPointFn->getAttr<SYCLKernelEntryPointAttr>();
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erichkeane wrote:

Got it, thanks!

https://github.com/llvm/llvm-project/pull/133030