[clang] [flang] [llvm] [CLANG][OpenMP] Add support for OpenMP6.0 transparent clause. (PR #174646)

[Zahira Ammarguellat via cfe-commits]

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@@ -12477,6 +12465,10 @@ def err_ompx_bare_no_grid : Error<
   "'ompx_bare' clauses requires explicit grid size via 'num_teams' and 'thread_limit' clauses">;
 def err_omp_multi_expr_not_allowed: Error<"only one expression allowed in '%0' clause">;
 def err_ompx_more_than_three_expr_not_allowed: Error<"at most three expressions are allowed in '%0' clause in 'target teams ompx_bare' construct">;
+def err_omp_transparent_invalid_value : Error<"invalid value for transparent clause,"
+  " expected one of: omp_not_impex, omp_import, omp_export, omp_impex">;
+def err_omp_transparent_invalid_type : Error<
+  "transparent clause cannot be applied to type: %0">;
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zahiraam wrote:

Looks like we can't using a modifier when the diag argument is a `QualType`. It's crashing here: https://github.com/llvm/llvm-project/blob/main/clang/lib/AST/ASTDiagnostic.cpp#L427

https://github.com/llvm/llvm-project/pull/174646