[llvm] [clang] [openmp] [OpenMP] Introduce support for OMPX extensions and taskgraph frontend (PR #66919)

[Jose Manuel Monsalve Diaz via cfe-commits]

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@@ -1400,6 +1402,12 @@ def warn_omp_unknown_assumption_clause_missing_id
 def warn_omp_unknown_assumption_clause_without_args
     : Warning<"%0 clause should not be followed by arguments; tokens will be ignored">,
       InGroup<OpenMPClauses>;
+def warn_omp_extension_directive_not_enabled
+    : Warning<"OpenMP Extensions not enabled. Ignoring OpenMP Extension Directive '#pragma ompx %0'">,
+      InGroup<IgnoredPragmas>;
+def warn_omp_extension_clause_not_enabled
+    : Warning<"OpenMP Extensions not enabled. Ignoring OpenMP Extension Clause '%0'">,
+      InGroup<IgnoredPragmas>;
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josemonsalve2 wrote:

Same here @Munesanz, this should be addressed 

https://github.com/llvm/llvm-project/pull/66919