[AffineParallelize] expose options when creating pass (#124959)

Add a createAffineParallelizePass() that takes AffineParallelizeOptions 
so it can be customized in a pass pipeline.

Author: rscottmanley

mlir/include/mlir/Dialect/Affine/Passes.h

@@ -44,10 +44,6 @@ createSimplifyAffineStructuresPass();
 std::unique_ptr<OperationPass<func::FuncOp>>
 createAffineLoopInvariantCodeMotionPass();
 
-/// Creates a pass to convert all parallel affine.for's into 1-d affine.parallel
-/// ops.
-std::unique_ptr<OperationPass<func::FuncOp>> createAffineParallelizePass();
-
 /// Apply normalization transformations to affine loop-like ops. If
 /// `promoteSingleIter` is true, single iteration loops are promoted (i.e., the
 /// loop is replaced by its loop body).

mlir/include/mlir/Dialect/Affine/Passes.td

@@ -370,7 +370,6 @@ def AffineVectorize : Pass<"affine-super-vectorize", "func::FuncOp"> {
 
 def AffineParallelize : Pass<"affine-parallelize", "func::FuncOp"> {
   let summary = "Convert affine.for ops into 1-D affine.parallel";
-  let constructor = "mlir::affine::createAffineParallelizePass()";
   let options = [
     Option<"maxNested", "max-nested", "unsigned", /*default=*/"-1u",
            "Maximum number of nested parallel loops to produce. "

mlir/lib/Dialect/Affine/Transforms/AffineParallelize.cpp

@@ -42,6 +42,8 @@ namespace {
 /// Convert all parallel affine.for op into 1-D affine.parallel op.
 struct AffineParallelize
     : public affine::impl::AffineParallelizeBase<AffineParallelize> {
+  using AffineParallelizeBase<AffineParallelize>::AffineParallelizeBase;
+
   void runOnOperation() override;
 };
 
@@ -90,8 +92,3 @@ void AffineParallelize::runOnOperation() {
     }
   }
 }
-
-std::unique_ptr<OperationPass<func::FuncOp>>
-mlir::affine::createAffineParallelizePass() {
-  return std::make_unique<AffineParallelize>();
-}