[llvm] [offload] use argument pointer array in olLaunchKernel (PR #194333)

[Piotr Balcer via llvm-commits]

================
@@ -4191,20 +4191,41 @@ Error AMDGPUKernelTy::launchImpl(GenericDeviceTy &GenericDevice,
   if (auto Err = GenericDevice.getDeviceStackSize(StackSize))
     return Err;
 
-  // Copy the explicit arguments.
-  // TODO: We should expose the args memory manager alloc to the common part as
-  // 	   alternative to copying them twice.
-  if (LaunchParams.Size)
-    std::memcpy(AllArgs, LaunchParams.Data, LaunchParams.Size);
+  // Copy explicit arguments.
+  size_t ExplicitEnd = 0;
+  if (KernelArgs.Flags.IsPtrArgs) {
+    if (KernelArgs.ArgPtrs) { // may be null
+      const auto &ArgMDs = KernelInfo->ExplicitArgMDs;
----------------
pbalcer wrote:

Done. `KernelInfo` is no longer an optional, and we return an error if it's not found.

https://github.com/llvm/llvm-project/pull/194333