[flang-commits] [flang] [flang][cuda][openacc] Add UseDevice attribute to model host_data use_device symbols (PR #195182)

[Zhen Wang via flang-commits]

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@@ -2930,6 +2930,24 @@ static int GetMatchingDistance(const common::LanguageFeatureControl &features,
       return 0;
     }
   }
+  // An actual argument with the UseDevice attribute comes from an OpenACC
+  // host_data use_device clause: the variable itself is host-resident, but
+  // inside the host_data region it is referenced via its device address.
+  // It can therefore match either a host dummy or a device dummy in generic
+  // resolution.  The matching distance disambiguates when both kinds of
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wangzpgi wrote:

This is to be aligned with other comments in this file which appears to have two spaces after a period.

https://github.com/llvm/llvm-project/pull/195182