[clang] [Clang][Sema][OpenMP] Allow `num_teams` to accept multiple expressions (PR #99732)

[Shilei Tian via cfe-commits]

================
@@ -11357,8 +11358,13 @@ void 
OMPClauseReader::VisitOMPAllocateClause(OMPAllocateClause *C) {
 
 void OMPClauseReader::VisitOMPNumTeamsClause(OMPNumTeamsClause *C) {
   VisitOMPClauseWithPreInit(C);
-  C->setNumTeams(Record.readSubExpr());
   C->setLParenLoc(Record.readSourceLocation());
+  unsigned NumVars = C->varlist_size();
+  SmallVector<Expr *, 16> Vars;
+  Vars.reserve(NumVars);
+  for ([[maybe_unused]] unsigned I : llvm::seq<unsigned>(NumVars))
----------------
shiltian wrote:

I thought this is Python syntax for unused variable?

https://github.com/llvm/llvm-project/pull/99732
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