[clang] [SYCL] The sycl_kernel_entry_point attribute. (PR #111389)

[Erich Keane via cfe-commits]

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@@ -455,6 +455,64 @@ The SYCL kernel in the previous code sample meets these expectations.
   }];
 }
 
+def SYCLKernelEntryPointDocs : Documentation {
+  let Category = DocCatFunction;
+  let Content = [{
+The ``sycl_kernel_entry_point`` attribute specifies that a function definition
+defines a pattern for an offload kernel entry point function to be emitted when
+the source code is compiled with ``-fsycl`` for a device target. Such functions
+serve as the execution entry point for a SYCL run-time library to invoke a SYCL
+kernel on a device. The function's parameters define the parameters to the
+offload kernel.
+
+The attribute requires a single type argument that specifies a class type that
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erichkeane wrote:

I like this development.  The work that is done in `sycl_kernel` to pull this out of the template argument was always problematic to me.

https://github.com/llvm/llvm-project/pull/111389