[llvm-branch-commits] [llvm] [libsycl] add single_task (PR #188797)

[Sergey Semenov via llvm-branch-commits]

================
@@ -138,12 +161,85 @@ class _LIBSYCL_EXPORT queue {
   template <typename Param>
   typename Param::return_type get_backend_info() const;
 
+  /// Defines and invokes a SYCL kernel function as a lambda expression or a
+  /// named function object type.
+  ///
+  /// \param kernelFunc is the kernel functor or lambda.
+  /// \return an event that represents the status of the submitted kernel.
+  template <typename KernelName, typename KernelType>
+  event single_task(const KernelType &kernelFunc) {
+    return single_task<KernelName, KernelType>({}, kernelFunc);
+  }
+
+  /// Defines and invokes a SYCL kernel function as a lambda expression or a
+  /// named function object type.
+  ///
+  /// \param depEvent is an event that specifies the kernel dependency.
+  /// \param kernelFunc is the kernel functor or lambda.
+  /// \return an event that represents the status of the submitted kernel.
+  template <typename KernelName, typename KernelType>
+  event single_task(event depEvent, const KernelType &kernelFunc) {
+    return single_task<KernelName, KernelType>({depEvent}, kernelFunc);
+  }
+
+  /// Defines and invokes a SYCL kernel function as a lambda expression or a
+  /// named function object type.
+  ///
+  /// \param depEvents is a collection of events which specify the kernel
+  /// dependencies.
+  /// \param kernelFunc is the kernel functor or lambda.
+  /// \return an event that represents the status of the submitted kernel.
+  template <typename KernelName, typename KernelType>
+  event single_task(const std::vector<event> &depEvents,
+                    const KernelType &kernelFunc) {
+    static_assert(
+        (detail::CheckFunctionSignature<std::remove_reference_t<KernelType>,
+                                        void()>::value),
+        "sycl::queue::single_task() requires a kernel instead of command "
+        "group. ");
----------------
sergey-semenov wrote:

```suggestion
        "sycl::queue::single_task() requires a kernel instead of a command "
        "group");
```

https://github.com/llvm/llvm-project/pull/188797