[llvm] [Offload] Add device UID (PR #164391)

[Robert Imschweiler via llvm-commits]

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@@ -715,6 +715,9 @@ GenericDeviceTy::GenericDeviceTy(GenericPluginTy &Plugin, int32_t DeviceId,
       DeviceId(DeviceId), GridValues(OMPGridValues),
       PeerAccesses(NumDevices, PeerAccessState::PENDING), PeerAccessesLock(),
       PinnedAllocs(*this), RPCServer(nullptr) {
+  DeviceUid = std::string(Plugin.getName()) + "-" +
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ro-i wrote:

I do. This is just the default implementation. It is overwritten in the amdgpu rtl, for example.
(And in the cuda rtl, once I add cuDeviceGetUuid() as you suggested below. Just needed to check for a test system.)

https://github.com/llvm/llvm-project/pull/164391