[clang] [llvm] [OpenMP 60] Update parsing and semantic support for `nowait` clause to accept optional argument (PR #159628)

[Alexey Bataev via llvm-commits]

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@@ -3179,7 +3180,8 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
       ErrorFound = true;
     }
 
-    if ((CKind == OMPC_ordered || CKind == OMPC_partial) &&
+    if ((CKind == OMPC_ordered || CKind == OMPC_nowait ||
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alexey-bataev wrote:

Shouldbe unsupported, if version is < 6.0

https://github.com/llvm/llvm-project/pull/159628