const (
	leaveDeadValues  deadValueChoice = false
	removeDeadValues                 = true
)

// deadcode indicates whether rewrite should try to remove any values that become dead.
func applyRewrite(f *Func, rb blockRewriter, rv valueRewriter, deadcode deadValueChoice) {
	// repeat rewrites until we find no more rewrites
	pendingLines := f.cachedLineStarts // Holds statement boundaries that need to be moved to a new value/block
	pendingLines.clear()

                          ArrayRef<int64_t> shape, int64_t val) {
  RankedTensorType type =
      tensorflow::GetTypeFromTFTensorShape(shape, rewriter->getIntegerType(64));
  DenseElementsAttr attr =
      DenseElementsAttr::get(type, rewriter->getI64IntegerAttr(val));
  return rewriter->create<arith::ConstantOp>(loc, type, attr);
}

Value CreateI32SplatTensor(Location loc, PatternRewriter *rewriter,

// Returns pass that prepares TPU computation to be legal for export to
// TensorFlow.
std::unique_ptr<OperationPass<ModuleOp>>
CreatePrepareTpuComputationForTfExportPass();

// Rewrites ops that require quantized inputs or outputs to ops that allow
// non-quantized inputs and outputs.
std::unique_ptr<OperationPass<func::FuncOp>> CreateLowerQuantizedPass();

}

def HoistReplicateInvariantResourceWritesPass : Pass<"tf-hoist-replicate-invariant-resource-writes", "mlir::func::FuncOp"> {
  let summary = "Hoists writes to replicate invariant resource variables.";

  let description = [{
    This pass hoists replicate invariant resource variable writes outside
    tf_device.replicate op. These may have been inserted by other passes such as

			}
			d.markableMethods = append(d.markableMethods, methods...)
		}
	}
}

// mapinitcleanup walks all pkg init functions and looks for weak relocations
// to mapinit symbols that are no longer reachable. It rewrites
// the relocs to target a new no-op routine in the runtime.
func (d *deadcodePass) mapinitcleanup() {
	for _, idx := range d.pkginits {
		relocs := d.ldr.Relocs(idx)
		var su *loader.SymbolBuilder

	}

	return
}

// validateAuthorityRewrite ensures we only attempt rewrite authority in a single place.
func validateAuthorityRewrite(rewrite *networking.HTTPRewrite, headers *networking.Headers) error {
	current := rewrite.GetAuthority()
	for k, v := range headers.GetRequest().GetSet() {
		if !isAuthorityHeader(k) {
			continue
		}
		if current != "" {

        changed = true;
      }
    }
    if (changed) {
      rewriter.finalizeOpModification(branch);
      return success();
    } else {
      rewriter.cancelOpModification(branch);
      return failure();
    }
  }

  LogicalResult matchAndRewrite(TF::IfOp ifop,
                                PatternRewriter& rewriter) const override {
    bool success =

    auto out_type = op.getZ().getType();

    l = rewriter.create<ConvertOp>(op.getLoc(), l, rewriter.getF32Type());
    r = rewriter.create<ConvertOp>(op.getLoc(), r, rewriter.getF32Type());

    auto intermediate = rewriter.create<TF::FloorDivOp>(
        op.getLoc(),
        ChangeTensorElementType(&rewriter, out_type, rewriter.getF32Type()), l,
        r);

    auto floor_op =

//
// When compiling a single main package, build writes the resulting
// executable to an output file named after the last non-major-version
// component of the package import path. The '.exe' suffix is added
// when writing a Windows executable.
// So 'go build example/sam' writes 'sam' or 'sam.exe'.
// 'go build example.com/foo/v2' writes 'foo' or 'foo.exe', not 'v2.exe'.
//

	return errs
}

func validateHTTPRewrite(rewrite *networking.HTTPRewrite) error {
	if rewrite == nil {
		return nil
	}
	if rewrite.Uri != "" && rewrite.UriRegexRewrite != nil {
		return errors.New("rewrite may only contain one of URI or UriRegexRewrite")
	}
	if rewrite.Uri == "" && rewrite.UriRegexRewrite == nil && rewrite.Authority == "" {