AddHostComputeKeyPlaceholder(xla_cluster_name, &host_graph));

  // Step 2: rewrite cond function.
  TF_RETURN_IF_ERROR(RewriteHostWhileLoopCond(
      cond_host_func_name, while_node_name, host_transfer_key,
      xla_cluster_attr_name, xla_cluster_name, outside_compilation_attr_name,
      outside_compilation_name, fld));

  // Step 3: rewrite body function.
  TF_RETURN_IF_ERROR(RewriteHostWhileLoopBody(

  // Book keeping new filter shape for backprop filter rewrite.
  // Filter shape is defined in HandleConv2DFilter, thus it is RankedTensorType.
  filter_shape =
      mlir::cast<RankedTensorType>(conv2d.getFilter().getType()).getShape();
  SmallVector<int32_t, 4> new_filter_shape(filter_shape.begin(),
                                           filter_shape.end());

  // Rewrite Conv2DBackPropFilter that is the user of first convolution's input.

	}
	delegate.Match = merged

	if delegate.Name == "" {
		delegate.Name = root.Name
	} else if root.Name != "" {
		delegate.Name = root.Name + "-" + delegate.Name
	}
	if delegate.Rewrite == nil {
		delegate.Rewrite = root.Rewrite
	}
	if delegate.DirectResponse == nil {
		delegate.DirectResponse = root.DirectResponse
	}
	if delegate.Timeout == nil {
		delegate.Timeout = root.Timeout
	}

    bool legalize_chlo = true,
    std::optional<StringRef> tf2xla_fallback_device_type = std::nullopt,
    bool prefer_tf2xla = false);

/// Adds the TF to TF lowerings and TF to XLA rewrite patterns to the pattern
/// list.
void PopulateLegalizeTfPatterns(MLIRContext* context,
                                RewritePatternSet* patterns);

// Populates TF to MHLO legalization for some of the quantization ops.

	var out []Inline // allocated lazily when we first change list
	for i, x := range list {
		switch x := x.(type) {
		case *Plain:
			if rewrite := p.autoLinkPlain(x.Text); rewrite != nil {
				if out == nil {
					out = append(out, list[:i]...)
				}
				out = append(out, rewrite...)
				continue
			}
		case *Strong:
			x.Inner = p.autoLinkText(x.Inner)
		case *Del:
			x.Inner = p.autoLinkText(x.Inner)

func phielim(f *Func) {
	for {
		change := false
		for _, b := range f.Blocks {
			for _, v := range b.Values {
				// This is an early place in SSA where all values are examined.
				// Rewrite all 0-sized Go values to remove accessors, dereferences, loads, etc.
				if t := v.Type; (t.IsStruct() || t.IsArray()) && t.Size() == 0 {
					if t.IsStruct() {
						v.reset(OpStructMake0)
					} else {

      auto dimsType = RankedTensorType::get({1}, rewriter.getIntegerType(64));
      broadcast_dims = DenseIntElementsAttr::get(dimsType, {filter_rank - 1});
    }
    Value broadcast_multiplier = rewriter.create<mhlo::BroadcastInDimOp>(
        mul_op.getLoc(), filter.getType(), multiplier, broadcast_dims);
    Value new_filter = rewriter.create<mhlo::MulOp>(

    };

    auto dequant_values =
        mlir::cast<DenseIntOrFPElementsAttr>(input_values)
            .mapValues(FloatType::getF32(rewriter.getContext()),
                       llvm::function_ref<DequantizeFuncType>(dequantize_func));
    rewriter.replaceOpWithNewOp<TFL::ConstOp>(dequant_op, dequant_op.getType(),
                                              dequant_values);

    return success();
  }
};

#include "mlir/IR/PatternMatch.h"  // from @llvm-project
#include "mlir/IR/SymbolTable.h"  // from @llvm-project
#include "mlir/Pass/Pass.h"  // from @llvm-project
#include "mlir/Pass/PassRegistry.h"  // from @llvm-project
#include "mlir/Rewrite/FrozenRewritePatternSet.h"  // from @llvm-project
#include "mlir/Support/LLVM.h"  // from @llvm-project
#include "mlir/Support/LogicalResult.h"  // from @llvm-project
#include "mlir/Support/TypeID.h"  // from @llvm-project

      }
    } else {
      return failure();
    }

    rewriter.setInsertionPointAfter(op.getOperation());
    Type result_type = quant_type.castFromExpressedType(op.getType());
    auto q =
        rewriter.create<QuantizeOpT>(op.getLoc(), result_type, op.getArg());
    q->setAttr(kVolatileOpAttrName, rewriter.getUnitAttr());

    auto dq = rewriter.create<DequantizeOpT>(op.getLoc(), op.getType(), q);