[flang] [llvm] [FLANG][OpenMP]Add frontend support for ASSUME and ASSUMES (PR #120770)

[Kiran Chandramohan via llvm-commits]

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@@ -3117,6 +3139,10 @@ class UnparseVisitor {
     return Walk("", list, comma, suffix);
   }
 
+  void Walk(const OmpClauseList &x, const char *sep = " ") {
+    return Walk(" ", x.v, sep);
+  }
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kiranchandramohan wrote:

Nit: Is this required?

https://github.com/llvm/llvm-project/pull/120770