[clang] [flang] [llvm] [OpenMP] Add parser/semantic support for dyn_groupprivate clause (PR #152651)

[Alexey Bataev via cfe-commits]

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@@ -4008,6 +4009,82 @@ OMPClause *Parser::ParseOpenMPSingleExprWithArgClause(OpenMPDirectiveKind DKind,
       Arg.push_back(OMPC_GRAINSIZE_unknown);
       KLoc.emplace_back();
     }
+  } else if (Kind == OMPC_dyn_groupprivate) {
+    enum { SimpleModifier, ComplexModifier, NumberOfModifiers };
+    Arg.resize(NumberOfModifiers);
+    KLoc.resize(NumberOfModifiers);
+    Arg[SimpleModifier] = OMPC_DYN_GROUPPRIVATE_unknown;
+    Arg[ComplexModifier] = OMPC_DYN_GROUPPRIVATE_FALLBACK_unknown;
+
+    auto consumeModifier = [&]() {
----------------
alexey-bataev wrote:

```suggestion
    auto ConsumeModifier = [&]() {
```

https://github.com/llvm/llvm-project/pull/152651