[llvm] [Offload] Add olKernelMaxGroupSize (PR #142950)

[Ross Brunton via llvm-commits]

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@@ -24,6 +24,19 @@ def : Function {
     let returns = [];
 }
 
+def : Function {
+    let name = "olKernelMaxGroupSize";
+    let desc = "Get the maximum block size needed to achieve maximum occupancy.";
+    let details = [];
+    let params = [
+        Param<"ol_kernel_handle_t", "Kernel", "handle of the kernel", PARAM_IN>,
+        Param<"ol_device_handle_t", "Device", "device intended to run the kernel", PARAM_IN>,
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RossBrunton wrote:

The question about adding a dedicated kernel_handle_t type that contains a pointer to the GenericKernelTy, the device and maybe even the amount of dynamic memory required? That's my preference and will ease any headaches down the line if we need to add additional information to kernels.

https://github.com/llvm/llvm-project/pull/142950