[Flang][OpenMP] Add workdistribute lower pass to pipeline

Author: skc7

flang/lib/Optimizer/Passes/Pipelines.cpp

@@ -278,8 +278,10 @@ void createHLFIRToFIRPassPipeline(mlir::PassManager &pm, bool enableOpenMP,
     addNestedPassToAllTopLevelOperations<PassConstructor>(
         pm, hlfir::createInlineHLFIRAssign);
   pm.addPass(hlfir::createConvertHLFIRtoFIR());
-  if (enableOpenMP)
+  if (enableOpenMP) {
     pm.addPass(flangomp::createLowerWorkshare());
+    pm.addPass(flangomp::createLowerWorkdistribute());
+  }
 }
 
 /// Create a pass pipeline for handling certain OpenMP transformations needed