[llvm] [Offload] Allow setting null arguments in olLaunchKernel (PR #141958)

[Ross Brunton via llvm-commits]

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@@ -1260,9 +1261,11 @@ struct AMDGPUStreamTy {
     // Consume stream slot and compute dependencies.
     auto [Curr, InputSignal] = consume(OutputSignal);
 
-    // Setup the post action to release the kernel args buffer.
-    if (auto Err = Slots[Curr].schedReleaseBuffer(KernelArgs, MemoryManager))
-      return Err;
+    // Setup the post action to release the kernel args buffer, if it exists
+    if (KernelArgs) {
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RossBrunton wrote:

Just removed all the AMD-specific fixes and rebased on main and yep, looks like it's passing now.

https://github.com/llvm/llvm-project/pull/141958