"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ResidualFunctions = undefined;

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); /**
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      * Copyright (c) 2017-present, Facebook, Inc.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      * All rights reserved.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      *
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      * This source code is licensed under the BSD-style license found in the
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      * LICENSE file in the root directory of this source tree. An additional grant
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      * of patent rights can be found in the PATENTS file in the same directory.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      */

var _errors = require("../errors.js");

var _realm = require("../realm.js");

var _index = require("../values/index.js");

var _babelTypes = require("babel-types");

var t = _interopRequireWildcard(_babelTypes);

var _babelTraverse = require("babel-traverse");

var _babelTraverse2 = _interopRequireDefault(_babelTraverse);

var _invariant = require("../invariant.js");

var _invariant2 = _interopRequireDefault(_invariant);

var _types = require("./types.js");

var _visitors = require("./visitors.js");

var _modules = require("./modules.js");

var _ResidualFunctionInitializers = require("./ResidualFunctionInitializers.js");

var _internalizer = require("../utils/internalizer.js");

var _Referentializer = require("./Referentializer.js");

var _utils = require("./utils.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var ResidualFunctions = exports.ResidualFunctions = function () {
  function ResidualFunctions(realm, statistics, options, modules, requireReturns, locationService, prelude, initializerNameGenerator, factoryNameGenerator, scopeNameGenerator, referentializedNameGenerator, residualFunctionInfos, residualFunctionInstances, additionalFunctionValueInfos, additionalFunctionValueNestedFunctions) {
    _classCallCheck(this, ResidualFunctions);

    this.realm = realm;
    this.statistics = statistics;
    this.modules = modules;
    this.requireReturns = requireReturns;
    this.locationService = locationService;
    this.prelude = prelude;
    this.factoryNameGenerator = factoryNameGenerator;
    this.functionPrototypes = new Map();
    this.firstFunctionUsages = new Map();
    this.functions = new Map();
    this.functionInstances = [];
    this.residualFunctionInitializers = new _ResidualFunctionInitializers.ResidualFunctionInitializers(locationService, prelude, initializerNameGenerator);
    this.residualFunctionInfos = residualFunctionInfos;
    this.residualFunctionInstances = residualFunctionInstances;
    this.additionalFunctionValueInfos = additionalFunctionValueInfos;
    this.referentializer = new _Referentializer.Referentializer(options, scopeNameGenerator, referentializedNameGenerator, statistics);
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
      for (var _iterator = residualFunctionInstances.values()[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        var instance = _step.value;

        (0, _invariant2.default)(instance !== undefined);
        if (!additionalFunctionValueInfos.has(instance.functionValue)) this.addFunctionInstance(instance);
      }
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator.return) {
          _iterator.return();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }

    this.additionalFunctionValueNestedFunctions = additionalFunctionValueNestedFunctions;
    this.simpleClosures = !!options.simpleClosures;
  }

  _createClass(ResidualFunctions, [{
    key: "addFunctionInstance",
    value: function addFunctionInstance(instance) {
      this.functionInstances.push(instance);
      var code = instance.functionValue.$ECMAScriptCode;
      (0, _invariant2.default)(code != null);
      (0, _utils.getOrDefault)(this.functions, code, function () {
        return [];
      }).push(instance);
    }
  }, {
    key: "setFunctionPrototype",
    value: function setFunctionPrototype(constructor, prototypeId) {
      this.functionPrototypes.set(constructor, prototypeId);
    }
  }, {
    key: "addFunctionUsage",
    value: function addFunctionUsage(val, bodyReference) {
      if (!this.firstFunctionUsages.has(val)) this.firstFunctionUsages.set(val, bodyReference);
    }
  }, {
    key: "_shouldUseFactoryFunction",
    value: function _shouldUseFactoryFunction(funcBody, instances) {
      function shouldInlineFunction() {
        var shouldInline = true;
        if (funcBody.start && funcBody.end) {
          var bodySize = funcBody.end - funcBody.start;
          shouldInline = bodySize <= 30;
        }
        return shouldInline;
      }
      var functionInfo = this.residualFunctionInfos.get(funcBody);
      (0, _invariant2.default)(functionInfo);
      var usesArguments = functionInfo.usesArguments;

      return !shouldInlineFunction() && instances.length > 1 && !usesArguments && !this.simpleClosures;
    }

    // Note: this function takes linear time. Please do not call it inside loop.

  }, {
    key: "_hasRewrittenFunctionInstance",
    value: function _hasRewrittenFunctionInstance(rewrittenAdditionalFunctions, instances) {
      return instances.find(function (instance) {
        return rewrittenAdditionalFunctions.has(instance.functionValue);
      }) !== undefined;
    }
  }, {
    key: "_generateFactoryFunctionInfos",
    value: function _generateFactoryFunctionInfos(rewrittenAdditionalFunctions) {
      var factoryFunctionInfos = new Map();
      var _iteratorNormalCompletion2 = true;
      var _didIteratorError2 = false;
      var _iteratorError2 = undefined;

      try {
        for (var _iterator2 = this.functions[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
          var _ref = _step2.value;

          var _ref2 = _slicedToArray(_ref, 2);

          var functionBody = _ref2[0];
          var instances = _ref2[1];

          (0, _invariant2.default)(instances.length > 0);

          var factoryId = void 0;
          var suffix = instances[0].functionValue.__originalName || this.realm.debugNames ? "factoryFunction" : "";
          if (this._shouldUseFactoryFunction(functionBody, instances)) {
            // Rewritten function should never use factory function.
            (0, _invariant2.default)(!this._hasRewrittenFunctionInstance(rewrittenAdditionalFunctions, instances));
            factoryId = t.identifier(this.factoryNameGenerator.generate(suffix));
          } else {
            // For inline function body case, use the first function as the factory function.
            factoryId = this.locationService.getLocation(instances[0].functionValue);
          }

          var functionUniqueTag = functionBody.uniqueOrderedTag;
          (0, _invariant2.default)(functionUniqueTag);

          var functionInfo = this.residualFunctionInfos.get(functionBody);
          (0, _invariant2.default)(functionInfo);
          factoryFunctionInfos.set(functionUniqueTag, { factoryId: factoryId, functionInfo: functionInfo });
        }
      } catch (err) {
        _didIteratorError2 = true;
        _iteratorError2 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion2 && _iterator2.return) {
            _iterator2.return();
          }
        } finally {
          if (_didIteratorError2) {
            throw _iteratorError2;
          }
        }
      }

      return factoryFunctionInfos;
    }

    // Preserve residual functions' ordering based on its ast dfs traversal order.
    // This is necessary to prevent unexpected code locality issues.

  }, {
    key: "_sortFunctionByOriginalOrdering",
    value: function _sortFunctionByOriginalOrdering(functionEntries) {
      functionEntries.sort(function (funcA, funcB) {
        var funcAUniqueTag = funcA[0].uniqueOrderedTag;
        (0, _invariant2.default)(funcAUniqueTag);

        var funcBUniqueTag = funcB[0].uniqueOrderedTag;
        (0, _invariant2.default)(funcBUniqueTag);
        return funcAUniqueTag - funcBUniqueTag;
      });
    }
  }, {
    key: "spliceFunctions",
    value: function spliceFunctions(rewrittenAdditionalFunctions) {
      var _this = this;

      this.residualFunctionInitializers.scrubFunctionInitializers();

      var functionBodies = new Map();
      // these need to get spliced in at the end
      var additionalFunctionPreludes = new Map();
      var additionalFunctionModifiedBindingsSegment = new Map();
      var getModifiedBindingsSegment = function getModifiedBindingsSegment(additionalFunction) {
        return (0, _utils.getOrDefault)(additionalFunctionModifiedBindingsSegment, additionalFunction, function () {
          return [];
        });
      };
      var getFunctionBody = function getFunctionBody(instance) {
        return (0, _utils.getOrDefault)(functionBodies, instance, function () {
          return [];
        });
      };
      var globalPrelude = this.prelude;
      function getPrelude(instance) {
        var additionalFunction = instance.containingAdditionalFunction;
        var b = void 0;
        if (additionalFunction) {
          b = (0, _utils.getOrDefault)(additionalFunctionPreludes, additionalFunction, function () {
            return [];
          });
        } else {
          b = globalPrelude;
        }
        return b;
      }

      var requireStatistics = { replaced: 0, count: 0 };

      var functionEntries = Array.from(this.functions.entries());
      this._sortFunctionByOriginalOrdering(functionEntries);
      this.statistics.functions = functionEntries.length;
      var unstrictFunctionBodies = [];
      var strictFunctionBodies = [];
      var funcNodes = new Map();

      var _iteratorNormalCompletion3 = true;
      var _didIteratorError3 = false;
      var _iteratorError3 = undefined;

      try {
        for (var _iterator3 = functionEntries[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
          var _ref3 = _step3.value;

          var _ref4 = _slicedToArray(_ref3, 2);

          var funcBody = _ref4[0];
          var instances = _ref4[1];

          var functionInfo = this.residualFunctionInfos.get(funcBody);
          (0, _invariant2.default)(functionInfo);
          this.referentializer.referentialize(functionInfo.unbound, instances, function (instance) {
            return !rewrittenAdditionalFunctions.has(instance.functionValue);
          });
        }
      } catch (err) {
        _didIteratorError3 = true;
        _iteratorError3 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion3 && _iterator3.return) {
            _iterator3.return();
          }
        } finally {
          if (_didIteratorError3) {
            throw _iteratorError3;
          }
        }
      }

      var defineFunction = function defineFunction(instance, funcId, funcNode) {
        var functionValue = instance.functionValue;


        if (instance.initializationStatements.length > 0) {
          // always add initialization statements to insertion point
          var initializationBody = getFunctionBody(instance);
          Array.prototype.push.apply(initializationBody, instance.initializationStatements);
        }

        var body = void 0;
        if (t.isFunctionExpression(funcNode)) {
          funcNodes.set(functionValue, funcNode);
          body = getPrelude(instance);
        } else {
          (0, _invariant2.default)(t.isCallExpression(funcNode)); // .bind call
          body = getFunctionBody(instance);
        }

        body.push(t.variableDeclaration("var", [t.variableDeclarator(funcId, funcNode)]));
        var prototypeId = _this.functionPrototypes.get(functionValue);
        if (prototypeId !== undefined) {
          var id = _this.locationService.getLocation(functionValue);
          (0, _invariant2.default)(id !== undefined);
          body.push(t.variableDeclaration("var", [t.variableDeclarator(prototypeId, t.memberExpression(id, t.identifier("prototype")))]));
        }
      };

      // Emit code for ModifiedBindings for additional functions
      var _iteratorNormalCompletion4 = true;
      var _didIteratorError4 = false;
      var _iteratorError4 = undefined;

      try {
        for (var _iterator4 = this.additionalFunctionValueInfos[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
          var _ref5 = _step4.value;

          var _ref6 = _slicedToArray(_ref5, 2);

          var funcValue = _ref6[0];
          var funcInfo = _ref6[1];
          var _iteratorNormalCompletion11 = true;
          var _didIteratorError11 = false;
          var _iteratorError11 = undefined;

          try {
            for (var _iterator11 = funcInfo.modifiedBindings[Symbol.iterator](), _step11; !(_iteratorNormalCompletion11 = (_step11 = _iterator11.next()).done); _iteratorNormalCompletion11 = true) {
              var _ref15 = _step11.value;

              var _ref16 = _slicedToArray(_ref15, 2);

              var residualBinding = _ref16[1];

              var scope = residualBinding.scope;

              // TODO #989: This should probably be an invariant once captures work properly
              // Currently we don't referentialize bindings in additional functions (but we
              // do for bindings nested in additional functions)
              if (!residualBinding.referentialized) continue;

              // Find the proper prelude to emit to (global vs additional function's prelude)
              var bodySegment = getModifiedBindingsSegment(funcValue);

              // binding has been referentialized, so setup the scope to be able to
              // access bindings from other __captured_scopes initializers
              if (scope && scope.containingAdditionalFunction !== funcValue) {
                var decl = t.variableDeclaration("var", [t.variableDeclarator(t.identifier(scope.name), t.numericLiteral(scope.id))]);
                var init = this.referentializer.getReferentializedScopeInitialization(scope);
                bodySegment.push(decl);
                // flow forces me to do this
                Array.prototype.push.apply(bodySegment, init);
              }

              var newValue = residualBinding.additionalValueSerialized;
              (0, _invariant2.default)(newValue);
              var binding_reference = residualBinding.serializedValue;
              (0, _invariant2.default)(binding_reference);
              (0, _invariant2.default)(t.isLVal(binding_reference), "Referentialized values are always LVals");
              // This mutation is safe because it should always be either a global identifier (for global bindings)
              // or an accessor to a referentialized value.
              bodySegment.push(t.expressionStatement(t.assignmentExpression("=", binding_reference, newValue)));
            }
          } catch (err) {
            _didIteratorError11 = true;
            _iteratorError11 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion11 && _iterator11.return) {
                _iterator11.return();
              }
            } finally {
              if (_didIteratorError11) {
                throw _iteratorError11;
              }
            }
          }
        }

        // Process Additional Functions
      } catch (err) {
        _didIteratorError4 = true;
        _iteratorError4 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion4 && _iterator4.return) {
            _iterator4.return();
          }
        } finally {
          if (_didIteratorError4) {
            throw _iteratorError4;
          }
        }
      }

      var _iteratorNormalCompletion5 = true;
      var _didIteratorError5 = false;
      var _iteratorError5 = undefined;

      try {
        for (var _iterator5 = this.additionalFunctionValueInfos.entries()[Symbol.iterator](), _step5; !(_iteratorNormalCompletion5 = (_step5 = _iterator5.next()).done); _iteratorNormalCompletion5 = true) {
          var _ref7 = _step5.value;

          var _ref8 = _slicedToArray(_ref7, 2);

          var _funcValue = _ref8[0];
          var additionalFunctionInfo = _ref8[1];
          var instance = additionalFunctionInfo.instance;

          var functionValue = _funcValue;
          var params = functionValue.$FormalParameters;
          (0, _invariant2.default)(params !== undefined);

          var rewrittenBody = rewrittenAdditionalFunctions.get(_funcValue);
          (0, _invariant2.default)(rewrittenBody);

          // rewritten functions shouldn't have references fixed up because the body,
          // consists of serialized code. For simplicity we emit their instances in a naive way
          var functionBody = t.blockStatement(rewrittenBody);

          var id = this.locationService.getLocation(_funcValue);
          (0, _invariant2.default)(id !== undefined);
          var funcParams = params.slice();
          var funcNode = t.functionExpression(null, funcParams, functionBody);

          if (_funcValue.$Strict) {
            strictFunctionBodies.push(funcNode);
          } else {
            unstrictFunctionBodies.push(funcNode);
          }

          defineFunction(instance, id, funcNode);
        }

        // Process normal functions
      } catch (err) {
        _didIteratorError5 = true;
        _iteratorError5 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion5 && _iterator5.return) {
            _iterator5.return();
          }
        } finally {
          if (_didIteratorError5) {
            throw _iteratorError5;
          }
        }
      }

      var factoryFunctionInfos = this._generateFactoryFunctionInfos(rewrittenAdditionalFunctions);

      var _loop = function _loop(_funcBody, _instances) {
        var functionInfo = _this.residualFunctionInfos.get(_funcBody);
        (0, _invariant2.default)(functionInfo);
        var unbound = functionInfo.unbound,
            modified = functionInfo.modified,
            usesThis = functionInfo.usesThis;

        var params = _instances[0].functionValue.$FormalParameters;
        (0, _invariant2.default)(params !== undefined);

        // Split instances into normal or nested in an additional function
        var normalInstances = [];
        var additionalFunctionNestedInstances = [];
        var _iteratorNormalCompletion12 = true;
        var _didIteratorError12 = false;
        var _iteratorError12 = undefined;

        try {
          for (var _iterator12 = _instances[Symbol.iterator](), _step12; !(_iteratorNormalCompletion12 = (_step12 = _iterator12.next()).done); _iteratorNormalCompletion12 = true) {
            var _instance = _step12.value;

            if (_this.additionalFunctionValueNestedFunctions.has(_instance.functionValue)) additionalFunctionNestedInstances.push(_instance);else normalInstances.push(_instance);
          }
        } catch (err) {
          _didIteratorError12 = true;
          _iteratorError12 = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion12 && _iterator12.return) {
              _iterator12.return();
            }
          } finally {
            if (_didIteratorError12) {
              throw _iteratorError12;
            }
          }
        }

        var naiveProcessInstances = function naiveProcessInstances(instancesToSplice) {
          _this.statistics.functionClones += instancesToSplice.length - 1;

          var _iteratorNormalCompletion13 = true;
          var _didIteratorError13 = false;
          var _iteratorError13 = undefined;

          try {
            for (var _iterator13 = instancesToSplice[Symbol.iterator](), _step13; !(_iteratorNormalCompletion13 = (_step13 = _iterator13.next()).done); _iteratorNormalCompletion13 = true) {
              var _instance2 = _step13.value;
              var _functionValue = _instance2.functionValue,
                  residualFunctionBindings = _instance2.residualFunctionBindings,
                  scopeInstances = _instance2.scopeInstances;

              var _id = _this.locationService.getLocation(_functionValue);
              var _funcParams = params.slice();
              var _funcNode = t.functionExpression(null, _funcParams, t.cloneDeep(_funcBody));
              var scopeInitialization = [];
              var _iteratorNormalCompletion14 = true;
              var _didIteratorError14 = false;
              var _iteratorError14 = undefined;

              try {
                for (var _iterator14 = scopeInstances[Symbol.iterator](), _step14; !(_iteratorNormalCompletion14 = (_step14 = _iterator14.next()).done); _iteratorNormalCompletion14 = true) {
                  var _ref17 = _step14.value;

                  var _ref18 = _slicedToArray(_ref17, 2);

                  var scopeName = _ref18[0];
                  var _scope = _ref18[1];

                  scopeInitialization.push(t.variableDeclaration("var", [t.variableDeclarator(t.identifier(scopeName), t.numericLiteral(_scope.id))]));
                  scopeInitialization = scopeInitialization.concat(_this.referentializer.getReferentializedScopeInitialization(_scope));
                }
              } catch (err) {
                _didIteratorError14 = true;
                _iteratorError14 = err;
              } finally {
                try {
                  if (!_iteratorNormalCompletion14 && _iterator14.return) {
                    _iterator14.return();
                  }
                } finally {
                  if (_didIteratorError14) {
                    throw _iteratorError14;
                  }
                }
              }

              _funcNode.body.body = scopeInitialization.concat(_funcNode.body.body);

              (0, _babelTraverse2.default)(t.file(t.program([t.expressionStatement(_funcNode)])), _visitors.ClosureRefReplacer, null, {
                residualFunctionBindings: residualFunctionBindings,
                modified: modified,
                requireReturns: _this.requireReturns,
                requireStatistics: requireStatistics,
                isRequire: _this.modules.getIsRequire(_funcParams, [_functionValue]),
                factoryFunctionInfos: factoryFunctionInfos
              });

              if (_functionValue.$Strict) {
                strictFunctionBodies.push(_funcNode);
              } else {
                unstrictFunctionBodies.push(_funcNode);
              }

              defineFunction(_instance2, _id, _funcNode);
            }
          } catch (err) {
            _didIteratorError13 = true;
            _iteratorError13 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion13 && _iterator13.return) {
                _iterator13.return();
              }
            } finally {
              if (_didIteratorError13) {
                throw _iteratorError13;
              }
            }
          }
        };

        if (additionalFunctionNestedInstances.length > 0) naiveProcessInstances(additionalFunctionNestedInstances);
        if (!_this._shouldUseFactoryFunction(_funcBody, normalInstances)) {
          naiveProcessInstances(normalInstances);
        } else if (normalInstances.length > 0) {
          var functionUniqueTag = _funcBody.uniqueOrderedTag;
          (0, _invariant2.default)(functionUniqueTag);
          var factoryInfo = factoryFunctionInfos.get(functionUniqueTag);
          (0, _invariant2.default)(factoryInfo);
          var factoryId = factoryInfo.factoryId;

          // filter included variables to only include those that are different

          var factoryNames = [];
          var sameResidualBindings = new Map();
          var _iteratorNormalCompletion15 = true;
          var _didIteratorError15 = false;
          var _iteratorError15 = undefined;

          try {
            for (var _iterator15 = unbound[Symbol.iterator](), _step15; !(_iteratorNormalCompletion15 = (_step15 = _iterator15.next()).done); _iteratorNormalCompletion15 = true) {
              var name = _step15.value;

              var isDifferent = false;
              var lastBinding = void 0;

              var firstBinding = normalInstances[0].residualFunctionBindings.get(name);
              (0, _invariant2.default)(firstBinding);
              if (firstBinding.modified) {
                // Must modify for traversal
                sameResidualBindings.set(name, firstBinding);
                continue;
              }

              var _iteratorNormalCompletion19 = true;
              var _didIteratorError19 = false;
              var _iteratorError19 = undefined;

              try {
                for (var _iterator19 = normalInstances[Symbol.iterator](), _step19; !(_iteratorNormalCompletion19 = (_step19 = _iterator19.next()).done); _iteratorNormalCompletion19 = true) {
                  var _ref21 = _step19.value;
                  var _residualFunctionBindings = _ref21.residualFunctionBindings;

                  var _residualBinding = _residualFunctionBindings.get(name);

                  (0, _invariant2.default)(_residualBinding);
                  (0, _invariant2.default)(!_residualBinding.modified);
                  if (!lastBinding) {
                    lastBinding = _residualBinding;
                  } else if (!(0, _types.AreSameResidualBinding)(_this.realm, _residualBinding, lastBinding)) {
                    isDifferent = true;
                    break;
                  }
                }
              } catch (err) {
                _didIteratorError19 = true;
                _iteratorError19 = err;
              } finally {
                try {
                  if (!_iteratorNormalCompletion19 && _iterator19.return) {
                    _iterator19.return();
                  }
                } finally {
                  if (_didIteratorError19) {
                    throw _iteratorError19;
                  }
                }
              }

              if (isDifferent) {
                factoryNames.push(name);
              } else {
                (0, _invariant2.default)(lastBinding);
                sameResidualBindings.set(name, lastBinding);
              }
            }
          } catch (err) {
            _didIteratorError15 = true;
            _iteratorError15 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion15 && _iterator15.return) {
                _iterator15.return();
              }
            } finally {
              if (_didIteratorError15) {
                throw _iteratorError15;
              }
            }
          }

          var factoryParams = [];
          var _iteratorNormalCompletion16 = true;
          var _didIteratorError16 = false;
          var _iteratorError16 = undefined;

          try {
            for (var _iterator16 = factoryNames[Symbol.iterator](), _step16; !(_iteratorNormalCompletion16 = (_step16 = _iterator16.next()).done); _iteratorNormalCompletion16 = true) {
              var key = _step16.value;

              factoryParams.push(t.identifier(key));
            }
          } catch (err) {
            _didIteratorError16 = true;
            _iteratorError16 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion16 && _iterator16.return) {
                _iterator16.return();
              }
            } finally {
              if (_didIteratorError16) {
                throw _iteratorError16;
              }
            }
          }

          var scopeInitialization = [];
          var _iteratorNormalCompletion17 = true;
          var _didIteratorError17 = false;
          var _iteratorError17 = undefined;

          try {
            for (var _iterator17 = normalInstances[0].scopeInstances[Symbol.iterator](), _step17; !(_iteratorNormalCompletion17 = (_step17 = _iterator17.next()).done); _iteratorNormalCompletion17 = true) {
              var _ref19 = _step17.value;

              var _ref20 = _slicedToArray(_ref19, 2);

              var scopeName = _ref20[0];
              var _scope2 = _ref20[1];

              factoryParams.push(t.identifier(scopeName));
              scopeInitialization = scopeInitialization.concat(_this.referentializer.getReferentializedScopeInitialization(_scope2));
            }
          } catch (err) {
            _didIteratorError17 = true;
            _iteratorError17 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion17 && _iterator17.return) {
                _iterator17.return();
              }
            } finally {
              if (_didIteratorError17) {
                throw _iteratorError17;
              }
            }
          }

          factoryParams = factoryParams.concat(params).slice();

          // The Replacer below mutates the AST while the original AST may still be referenced
          // by another outer residual function so let's clone the original AST to avoid modifying it.
          var factoryNode = t.functionExpression(null, factoryParams, t.cloneDeep(_funcBody));

          if (normalInstances[0].functionValue.$Strict) {
            strictFunctionBodies.push(factoryNode);
          } else {
            unstrictFunctionBodies.push(factoryNode);
          }

          factoryNode.body.body = scopeInitialization.concat(factoryNode.body.body);

          // factory functions do not depend on any nested generator scope, so they go to the prelude
          var factoryDeclaration = t.variableDeclaration("var", [t.variableDeclarator(factoryId, factoryNode)]);
          _this.prelude.push(factoryDeclaration);

          (0, _babelTraverse2.default)(t.file(t.program([t.expressionStatement(factoryNode)])), _visitors.ClosureRefReplacer, null, {
            residualFunctionBindings: sameResidualBindings,
            modified: modified,
            requireReturns: _this.requireReturns,
            requireStatistics: requireStatistics,
            isRequire: _this.modules.getIsRequire(factoryParams, normalInstances.map(function (instance) {
              return instance.functionValue;
            })),
            factoryFunctionInfos: factoryFunctionInfos
          });

          var _loop2 = function _loop2(_instance3) {
            var functionValue = _instance3.functionValue,
                residualFunctionBindings = _instance3.residualFunctionBindings,
                insertionPoint = _instance3.insertionPoint;

            var functionId = _this.locationService.getLocation(functionValue);
            (0, _invariant2.default)(functionId !== undefined);
            var hasFunctionArg = false;
            var flatArgs = factoryNames.map(function (name) {
              var residualBinding = residualFunctionBindings.get(name);
              (0, _invariant2.default)(residualBinding);
              var serializedValue = residualBinding.serializedValue;
              hasFunctionArg = hasFunctionArg || residualBinding.value && residualBinding.value instanceof _index.FunctionValue;
              (0, _invariant2.default)(serializedValue);
              return serializedValue;
            });
            var _iteratorNormalCompletion20 = true;
            var _didIteratorError20 = false;
            var _iteratorError20 = undefined;

            try {
              for (var _iterator20 = _instance3.scopeInstances[Symbol.iterator](), _step20; !(_iteratorNormalCompletion20 = (_step20 = _iterator20.next()).done); _iteratorNormalCompletion20 = true) {
                var entry = _step20.value;

                flatArgs.push(t.numericLiteral(entry[1].id));
              }
            } catch (err) {
              _didIteratorError20 = true;
              _iteratorError20 = err;
            } finally {
              try {
                if (!_iteratorNormalCompletion20 && _iterator20.return) {
                  _iterator20.return();
                }
              } finally {
                if (_didIteratorError20) {
                  throw _iteratorError20;
                }
              }
            }

            var funcNode = void 0;
            var firstUsage = _this.firstFunctionUsages.get(functionValue);
            (0, _invariant2.default)(insertionPoint !== undefined);
            if (
            // The same free variables in shared instances may refer to objects with different initialization values
            // so a stub forward function is needed during delay initializations.
            _this.residualFunctionInitializers.hasInitializerStatement(functionValue) || usesThis || hasFunctionArg || firstUsage !== undefined && !firstUsage.isNotEarlierThan(insertionPoint) || _this.functionPrototypes.get(functionValue) !== undefined || _this.simpleClosures) {
              var callArgs = [t.thisExpression()];
              var _iteratorNormalCompletion21 = true;
              var _didIteratorError21 = false;
              var _iteratorError21 = undefined;

              try {
                for (var _iterator21 = flatArgs[Symbol.iterator](), _step21; !(_iteratorNormalCompletion21 = (_step21 = _iterator21.next()).done); _iteratorNormalCompletion21 = true) {
                  var flatArg = _step21.value;
                  callArgs.push(flatArg);
                }
              } catch (err) {
                _didIteratorError21 = true;
                _iteratorError21 = err;
              } finally {
                try {
                  if (!_iteratorNormalCompletion21 && _iterator21.return) {
                    _iterator21.return();
                  }
                } finally {
                  if (_didIteratorError21) {
                    throw _iteratorError21;
                  }
                }
              }

              var _iteratorNormalCompletion22 = true;
              var _didIteratorError22 = false;
              var _iteratorError22 = undefined;

              try {
                for (var _iterator22 = params[Symbol.iterator](), _step22; !(_iteratorNormalCompletion22 = (_step22 = _iterator22.next()).done); _iteratorNormalCompletion22 = true) {
                  var param = _step22.value;

                  if (param.type !== "Identifier") {
                    throw new _errors.FatalError("TODO: do not know how to deal with non-Identifier parameters");
                  }
                  callArgs.push(param);
                }
              } catch (err) {
                _didIteratorError22 = true;
                _iteratorError22 = err;
              } finally {
                try {
                  if (!_iteratorNormalCompletion22 && _iterator22.return) {
                    _iterator22.return();
                  }
                } finally {
                  if (_didIteratorError22) {
                    throw _iteratorError22;
                  }
                }
              }

              var callee = t.memberExpression(factoryId, t.identifier("call"));

              var childBody = t.blockStatement([t.returnStatement(t.callExpression(callee, callArgs))]);

              funcNode = t.functionExpression(null, params, childBody);
              if (functionValue.$Strict) {
                strictFunctionBodies.push(funcNode);
              } else {
                unstrictFunctionBodies.push(funcNode);
              }
            } else {
              funcNode = t.callExpression(t.memberExpression(factoryId, t.identifier("bind")), [_internalizer.nullExpression].concat(flatArgs));
            }

            defineFunction(_instance3, functionId, funcNode);
          };

          var _iteratorNormalCompletion18 = true;
          var _didIteratorError18 = false;
          var _iteratorError18 = undefined;

          try {
            for (var _iterator18 = normalInstances[Symbol.iterator](), _step18; !(_iteratorNormalCompletion18 = (_step18 = _iterator18.next()).done); _iteratorNormalCompletion18 = true) {
              var _instance3 = _step18.value;

              _loop2(_instance3);
            }
          } catch (err) {
            _didIteratorError18 = true;
            _iteratorError18 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion18 && _iterator18.return) {
                _iterator18.return();
              }
            } finally {
              if (_didIteratorError18) {
                throw _iteratorError18;
              }
            }
          }
        }
      };

      var _iteratorNormalCompletion6 = true;
      var _didIteratorError6 = false;
      var _iteratorError6 = undefined;

      try {
        for (var _iterator6 = functionEntries[Symbol.iterator](), _step6; !(_iteratorNormalCompletion6 = (_step6 = _iterator6.next()).done); _iteratorNormalCompletion6 = true) {
          var _ref9 = _step6.value;

          var _ref10 = _slicedToArray(_ref9, 2);

          var _funcBody = _ref10[0];
          var _instances = _ref10[1];

          _loop(_funcBody, _instances);
        }
      } catch (err) {
        _didIteratorError6 = true;
        _iteratorError6 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion6 && _iterator6.return) {
            _iterator6.return();
          }
        } finally {
          if (_didIteratorError6) {
            throw _iteratorError6;
          }
        }
      }

      var _iteratorNormalCompletion7 = true;
      var _didIteratorError7 = false;
      var _iteratorError7 = undefined;

      try {
        for (var _iterator7 = this.referentializer.referentializationState.keys()[Symbol.iterator](), _step7; !(_iteratorNormalCompletion7 = (_step7 = _iterator7.next()).done); _iteratorNormalCompletion7 = true) {
          var referentializationScope = _step7.value;

          var prelude = this.prelude;
          // Get the prelude for this additional function value
          if (referentializationScope !== "GLOBAL") {
            var _additionalFunction = referentializationScope;
            prelude = (0, _utils.getOrDefault)(additionalFunctionPreludes, _additionalFunction, function () {
              return [];
            });
          }
          prelude.unshift(this.referentializer.createCaptureScopeAccessFunction(referentializationScope));
          prelude.unshift(this.referentializer.createCapturedScopesArrayInitialization(referentializationScope));
        }
      } catch (err) {
        _didIteratorError7 = true;
        _iteratorError7 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion7 && _iterator7.return) {
            _iterator7.return();
          }
        } finally {
          if (_didIteratorError7) {
            throw _iteratorError7;
          }
        }
      }

      var _iteratorNormalCompletion8 = true;
      var _didIteratorError8 = false;
      var _iteratorError8 = undefined;

      try {
        for (var _iterator8 = this.functionInstances.reverse()[Symbol.iterator](), _step8; !(_iteratorNormalCompletion8 = (_step8 = _iterator8.next()).done); _iteratorNormalCompletion8 = true) {
          var instance = _step8.value;

          var functionBody = functionBodies.get(instance);
          if (functionBody !== undefined) {
            var insertionPoint = instance.insertionPoint;
            (0, _invariant2.default)(insertionPoint instanceof _types.BodyReference);
            // v8 seems to do something clever with array splicing, so this potentially
            // expensive operations seems to be actually cheap.
            Array.prototype.splice.apply(insertionPoint.body.entries, [insertionPoint.index, 0].concat(functionBody));
          }
        }
      } catch (err) {
        _didIteratorError8 = true;
        _iteratorError8 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion8 && _iterator8.return) {
            _iterator8.return();
          }
        } finally {
          if (_didIteratorError8) {
            throw _iteratorError8;
          }
        }
      }

      var _iteratorNormalCompletion9 = true;
      var _didIteratorError9 = false;
      var _iteratorError9 = undefined;

      try {
        for (var _iterator9 = rewrittenAdditionalFunctions.entries()[Symbol.iterator](), _step9; !(_iteratorNormalCompletion9 = (_step9 = _iterator9.next()).done); _iteratorNormalCompletion9 = true) {
          var _ref11 = _step9.value;

          var _ref12 = _slicedToArray(_ref11, 2);

          var additionalFunction = _ref12[0];
          var body = _ref12[1];

          var bodySegment = additionalFunctionModifiedBindingsSegment.get(additionalFunction);
          var prelude = additionalFunctionPreludes.get(additionalFunction);
          if (prelude) body.unshift.apply(body, _toConsumableArray(prelude));
          if (bodySegment) {
            if (body.length > 0 && t.isReturnStatement(body[body.length - 1])) {
              var returnStatement = body.pop();
              body.push.apply(body, _toConsumableArray(bodySegment).concat([returnStatement]));
            } else {
              body.push.apply(body, _toConsumableArray(bodySegment));
            }
          }
        }

        // Inject initializer code for indexed vars into functions (for delay initializations)
      } catch (err) {
        _didIteratorError9 = true;
        _iteratorError9 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion9 && _iterator9.return) {
            _iterator9.return();
          }
        } finally {
          if (_didIteratorError9) {
            throw _iteratorError9;
          }
        }
      }

      var _iteratorNormalCompletion10 = true;
      var _didIteratorError10 = false;
      var _iteratorError10 = undefined;

      try {
        for (var _iterator10 = funcNodes[Symbol.iterator](), _step10; !(_iteratorNormalCompletion10 = (_step10 = _iterator10.next()).done); _iteratorNormalCompletion10 = true) {
          var _ref13 = _step10.value;

          var _ref14 = _slicedToArray(_ref13, 2);

          var functionValue = _ref14[0];
          var funcNode = _ref14[1];

          var initializerStatement = this.residualFunctionInitializers.getInitializerStatement(functionValue);
          if (initializerStatement !== undefined) {
            (0, _invariant2.default)(t.isFunctionExpression(funcNode));
            var blockStatement = funcNode.body;
            blockStatement.body.unshift(initializerStatement);
          }
        }
      } catch (err) {
        _didIteratorError10 = true;
        _iteratorError10 = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion10 && _iterator10.return) {
            _iterator10.return();
          }
        } finally {
          if (_didIteratorError10) {
            throw _iteratorError10;
          }
        }
      }

      return { unstrictFunctionBodies: unstrictFunctionBodies, strictFunctionBodies: strictFunctionBodies, requireStatistics: requireStatistics };
    }
  }]);

  return ResidualFunctions;
}();
//# sourceMappingURL=ResidualFunctions.js.map