implemented tensor array ops and hooked up with the executor

src/data/types.ts

@@ -15,6 +15,7 @@
  * =============================================================================
  */
 import {DataType, Tensor} from '@tensorflow/tfjs-core';
+import {TensorArray} from '../executor/tensor_array';
 
 export type NamedTensorMap = {
   [key: string]: Tensor
@@ -24,6 +25,10 @@ export type NamedTensorsMap = {
   [key: string]: Tensor[]
 };
 
+export type TensorArrayMap = {
+  [key: number]: TensorArray
+};
+
 export interface TensorInfo {
   name: string;
   shape?: number[];

src/executor/execution_context.ts

@@ -16,7 +16,9 @@
  */
 import {Tensor} from '@tensorflow/tfjs-core';
 
-import {NamedTensorsMap} from '../data/types';
+import {NamedTensorsMap, TensorArrayMap} from '../data/types';
+
+import {TensorArray} from './tensor_array';
 
 export interface ExecutionContextInfo {
   id: number;           // the unique id of the context info
@@ -40,7 +42,9 @@ export class ExecutionContext {
   private lastId = 0;
   private _currentContextIds: string[];
 
-  constructor(public weightMap: NamedTensorsMap) {
+  constructor(
+      public readonly weightMap: NamedTensorsMap,
+      public readonly tensorArrayMap: TensorArrayMap) {
     this.generateCurrentContextIds();
   }
 
@@ -151,4 +155,12 @@ export class ExecutionContext {
   getWeight(name: string): Tensor[] {
     return this.weightMap[name];
   }
+
+  addTensorArray(tensorArray: TensorArray) {
+    this.tensorArrayMap[tensorArray.id] = tensorArray;
+  }
+
+  getTensorArray(id: number): TensorArray {
+    return this.tensorArrayMap[id];
+  }
 }

src/executor/execution_context_test.ts

@@ -16,13 +16,14 @@
  */
 
 import {ExecutionContext} from './execution_context';
+import {TensorArray} from './tensor_array';
 
 let context: ExecutionContext;
+let tensorArray: TensorArray;
 describe('ExecutionContext', () => {
   beforeEach(() => {
-    context = new ExecutionContext({});
+    context = new ExecutionContext({}, {});
   });
-  afterEach(() => {});
 
   it('should initialize', () => {
     expect(context.currentContext).toEqual([
@@ -31,6 +32,21 @@ describe('ExecutionContext', () => {
     expect(context.currentContextId).toEqual('');
   });
 
+  describe('tensor array', () => {
+    beforeEach(() => {
+      tensorArray = new TensorArray('', 'float32', 10, [1], true, true, true);
+    });
+
+    it('should be able to add tensor array', () => {
+      context.addTensorArray(tensorArray);
+      expect(context.getTensorArray(tensorArray.id)).toBe(tensorArray);
+    });
+
+    it('should be able to read tensor array', () => {
+      expect(context.getTensorArray(tensorArray.id)).toBeUndefined();
+    });
+  });
+
   describe('enterFrame', () => {
     it('should add new Frame', () => {
       context.enterFrame('1');

src/executor/graph_executor.ts

@@ -15,11 +15,12 @@
  * =============================================================================
  */
 
-// tslint:disable-next-line:max-line-length
 import {DataType, Tensor, tidy, util} from '@tensorflow/tfjs-core';
 
-import {NamedTensorMap, NamedTensorsMap, TensorInfo} from '../data/types';
-import {getNodeNameAndIndex, getTensor} from '../operations/executors/utils';
+// tslint:disable-next-line:max-line-length
+import {NamedTensorMap, NamedTensorsMap, TensorArrayMap, TensorInfo} from '../data/types';
+// tslint:disable-next-line:max-line-length
+import {getNodeNameAndIndex, getParamValue, getTensor} from '../operations/executors/utils';
 import {executeOp} from '../operations/operation_executor';
 import {Graph, Node} from '../operations/types';
 
@@ -128,8 +129,9 @@ export class GraphExecutor {
   execute(inputs: NamedTensorsMap, outputs?: string|string[]): NamedTensorMap {
     this.checkInput(inputs);
     this.checkInputShapeAndType(inputs);
+    const tensorArrayMap: TensorArrayMap = {};
     const result = tidy(() => {
-      const context = new ExecutionContext(this._weightMap);
+      const context = new ExecutionContext(this._weightMap, tensorArrayMap);
       const tensors =
           this.compiledOrder.reduce<NamedTensorsMap>((map, node) => {
             map[node.name] = executeOp(node, map, context) as Tensor[];
@@ -153,7 +155,8 @@ export class GraphExecutor {
       Promise<NamedTensorMap> {
     this.checkInput(inputs);
     this.checkInputShapeAndType(inputs);
-    const context = new ExecutionContext(this._weightMap);
+    const tensorArrayMap: TensorArrayMap = {};
+    const context = new ExecutionContext(this._weightMap, tensorArrayMap);
     // Graph with control flow op requires runtime evaluation of the execution
     // order, while without control flow the execution order is pre-determined
     // in the compile method.
@@ -196,10 +199,20 @@ export class GraphExecutor {
     while (stack.length > 0) {
       const item = stack.pop();
       context.currentContext = item.contexts;
-
+      let nodeName = '';
+      // The tensor of the Enter op with isConstant set should be set
+      // in the parent scope, so it will be available as constant for the
+      // whole loop.
+      if (item.node.op === 'enter' &&
+          getParamValue('isConstant', item.node, tensorMap, context)) {
+        [nodeName] = getNodeNameAndIndex(item.node.name, context);
+      }
       const tensors = executeOp(item.node, tensorMap, context);
 
-      const [nodeName, ] = getNodeNameAndIndex(item.node.name, context);
+      if (!nodeName) {
+        [nodeName] = getNodeNameAndIndex(item.node.name, context);
+      }
+
       tensorMap[nodeName] = await tensors;
       item.node.children.forEach((childNode) => {
         const [nodeName, ] = getNodeNameAndIndex(childNode.name, context);

src/executor/tensor_array.ts

@@ -28,14 +28,18 @@ export interface TensorWithState {
  * allows reading from the array and writing to the array.
  */
 export class TensorArray {
+  private static nextId = 0;
   private tensors: TensorWithState[] = [];
   private closed_ = false;
+  readonly id: number;
   constructor(
       public readonly name: string, public readonly dtype: DataType,
       private maxSize: number, private elementShape: number[],
       public readonly identicalElementShapes: boolean,
       public readonly dynamicSize: boolean,
-      public readonly clearAfterRead: boolean) {}
+      public readonly clearAfterRead: boolean) {
+    this.id = TensorArray.nextId++;
+  }
 
   get closed() {
     return this.closed_;
@@ -114,6 +118,12 @@ export class TensorArray {
           because the value dtype is ${
           tensor.dtype}, but TensorArray dtype is ${this.dtype}.`);
     }
+
+    // Set the shape for the first time write to unknow shape tensor array
+    if (this.size() === 0 && this.elementShape.length === 0) {
+      this.elementShape = tensor.shape;
+    }
+
     util.assertShapesMatch(
         this.elementShape, tensor.shape,
         `TensorArray ${this.name}: Could not write to TensorArray index ${

src/operations/executors/arithmetic_executor_test.ts

@@ -26,7 +26,7 @@ describe('arithmetic', () => {
   let node: Node;
   const input1 = [tfc.scalar(1)];
   const input2 = [tfc.scalar(1)];
-  const context = new ExecutionContext({});
+  const context = new ExecutionContext({}, {});
 
   beforeEach(() => {
     node = {

src/operations/executors/basic_math_executor_test.ts

@@ -25,7 +25,7 @@ import {createNumberAttr, createTensorAttr} from './test_helper';
 describe('basic math', () => {
   let node: Node;
   const input1 = [tfc.scalar(1)];
-  const context = new ExecutionContext({});
+  const context = new ExecutionContext({}, {});
 
   beforeEach(() => {
     node = {

src/operations/executors/control_executor.ts

@@ -16,9 +16,11 @@
  */
 
 import * as tfc from '@tensorflow/tfjs-core';
+import {scalar} from '@tensorflow/tfjs-core';
 
 import {NamedTensorsMap} from '../../data/types';
 import {ExecutionContext} from '../../executor/execution_context';
+import {TensorArray} from '../../executor/tensor_array';
 import {Node} from '../types';
 
 import {getParamValue, getTensor} from './utils';
@@ -61,6 +63,97 @@ export async function executeOp(
           getParamValue('tensor', node, tensorMap, context) as tfc.Tensor;
       context.nextIteration();
       return [input];
+
+    case 'tensorArray':
+      const size = getParamValue('size', node, tensorMap, context) as number;
+      const dtype =
+          getParamValue('dtype', node, tensorMap, context) as tfc.DataType;
+      const elementShape =
+          getParamValue('elementShape', node, tensorMap, context) as number[];
+      const dynamicSize =
+          getParamValue('dynamicSize', node, tensorMap, context) as boolean;
+      const clearAfterRead =
+          getParamValue('clearAfterRead', node, tensorMap, context) as boolean;
+      const identicalElementShapes =
+          getParamValue('identicalElementShapes', node, tensorMap, context) as
+          boolean;
+      const name = getParamValue('name', node, tensorMap, context) as string;
+      const tensorArray = new TensorArray(
+          name, dtype, size, elementShape, identicalElementShapes, dynamicSize,
+          clearAfterRead);
+      context.addTensorArray(tensorArray);
+      return [scalar(tensorArray.id), scalar(1.0)];
+
+    case 'tensorArrayWrite':
+      const id =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const index = getParamValue('index', node, tensorMap, context) as number;
+      const writeTensor =
+          getParamValue('tensor', node, tensorMap, context) as tfc.Tensor;
+      const writeTensorArray = context.getTensorArray(id);
+      writeTensorArray.write(index, writeTensor);
+      return [scalar(1.0)];
+
+    case 'tensorArrayRead':
+      const readId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const readIndex =
+          getParamValue('index', node, tensorMap, context) as number;
+      const readTensorArray = context.getTensorArray(readId);
+      return [readTensorArray.read(readIndex)];
+
+    case 'tensorArrayGather':
+      const gatherId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const gatherIndices =
+          getParamValue('indices', node, tensorMap, context) as number[];
+      const gatherDtype =
+          getParamValue('dtype', node, tensorMap, context) as tfc.DataType;
+      const gatherTensorArray = context.getTensorArray(gatherId);
+      return [gatherTensorArray.gather(gatherIndices, gatherDtype)];
+
+    case 'tensorArrayScatter':
+      const scatterId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const scatterIndices =
+          getParamValue('indices', node, tensorMap, context) as number[];
+      const scatterTensor =
+          getParamValue('tensor', node, tensorMap, context) as tfc.Tensor;
+      const scatterTensorArray = context.getTensorArray(scatterId);
+      scatterTensorArray.scatter(scatterIndices, scatterTensor);
+      return [scalar(1.0)];
+
+    case 'tensorArrayConcat':
+      const concatId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const concatTensorArray = context.getTensorArray(concatId);
+      const concatDtype =
+          getParamValue('dtype', node, tensorMap, context) as tfc.DataType;
+      return [concatTensorArray.concat(concatDtype)];
+
+    case 'tensorArraySplit':
+      const splitId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const splitTensor =
+          getParamValue('tensor', node, tensorMap, context) as tfc.Tensor;
+      const lengths =
+          getParamValue('lengths', node, tensorMap, context) as number[];
+      const splitTensorArray = context.getTensorArray(splitId);
+      splitTensorArray.split(lengths, splitTensor);
+      return [scalar(1.0)];
+
+    case 'tensorArraySize':
+      const sizeId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const sizeTensorArray = context.getTensorArray(sizeId);
+      return [scalar(sizeTensorArray.size(), 'int32')];
+
+    case 'tensorArrayClose':
+      const closeId =
+          getParamValue('tensorArrayId', node, tensorMap, context) as number;
+      const closeTensorArray = context.getTensorArray(closeId);
+      closeTensorArray.clearAndClose();
+      return [];
     default:
       throw TypeError(`Node type ${node.op} is not implemented`);
   }