[clang] [CIR][OpenMP] Implement lowering for the 'if' clause for 'parallel' d… (PR #204999)

[Sergio Afonso via cfe-commits]

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@@ -39,10 +39,11 @@ CIRGenFunction::emitOMPParallelDirective(const OMPParallelDirective &s) {
   mlir::omp::ParallelOperands clauseOps;
   OpenMPClauseEmitter ce(*this, getCIRGenModule(), builder, begin, s.clauses());
   ce.emitProcBind(clauseOps);
-  ce.emitNYI</*supported=*/OMPProcBindClause>(
+  ce.emitIf(clauseOps, llvm::omp::Directive::OMPD_parallel);
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skatrak wrote:

Nit: We evaluate clauses in alphabetical order for consistency in Flang, unless there's some evaluation ordering requirement between them. I think it makes sense to follow that convention here as well. This one would go before `proc_bind`.

https://github.com/llvm/llvm-project/pull/204999