[Openmp-commits] [openmp] [amdgpu] Implement D2D memcpy as HSA call (PR #69955)

[Joseph Huber via Openmp-commits]

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@@ -2250,14 +2250,37 @@ struct AMDGPUDeviceTy : public GenericDeviceTy, AMDGenericDeviceTy {
                                           PinnedMemoryManager);
   }
 
-  /// Exchange data between two devices within the plugin. This function is not
-  /// supported in this plugin.
+  /// Exchange data between two devices within the plugin.
   Error dataExchangeImpl(const void *SrcPtr, GenericDeviceTy &DstGenericDevice,
                          void *DstPtr, int64_t Size,
                          AsyncInfoWrapperTy &AsyncInfoWrapper) override {
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jhuber6 wrote:

We have `AsyncInfoWrapper` here, my understanding is that these already contain a "stream" which is coded to an HSA signal. Maybe @jdoerfert can expand on this, but my understanding would be that we'd call `getStream` or something.

https://github.com/llvm/llvm-project/pull/69955