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

[Alexey Bataev via cfe-commits]

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@@ -308,6 +308,13 @@ OMPClause::child_range OMPIfClause::used_children() {
   return child_range(&Condition, &Condition + 1);
 }
 
+OMPClause::child_range OMPNowaitClause::used_children() {
+  if (Condition)
+    return child_range(&Condition, &Condition + 1);
+  Stmt *Null = nullptr;
+  return child_range(&Null, &Null);
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alexey-bataev wrote:

This is wrong, reference to a temp variable

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