[clang] [llvm] [OpenMP] OpenMP 5.1 "assume" directive parsing support (PR #92731)

[Alexey Bataev via llvm-commits]

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@@ -2013,6 +2014,179 @@ class OMPMergeableClause : public OMPClause {
   }
 };
 
+/// This represents the 'absent' clause in the '#pragma omp assume'
+/// directive.
+///
+/// \code
+/// #pragma omp assume absent(<directive-name list>)
+/// \endcode
+/// In this example directive '#pragma omp assume' has an 'absent' clause.
+class OMPAbsentClause final : public OMPNoChildClause<llvm::omp::OMPC_absent> {
+  llvm::SmallSet<OpenMPDirectiveKind, 4> DirectiveKinds;
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alexey-bataev wrote:

Must be tail allocated

https://github.com/llvm/llvm-project/pull/92731