Revert "Replace HeapNumber as doublebox with an explicit MutableHeapNumber."

test/mjsunit/migrations.js

-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-ayle license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax --track-fields --expose-gc
-
-var global = Function('return this')();
-var verbose = 0;
-
-function test(ctor_desc, use_desc, migr_desc) {
-  var n = 5;
-  var objects = [];
-  var results = [];
-
-  if (verbose) {
-    print();
-    print("===========================================================");
-    print("=== " + ctor_desc.name +
-          " | " + use_desc.name + " |--> " + migr_desc.name);
-    print("===========================================================");
-  }
-
-  // Clean ICs and transitions.
-  %NotifyContextDisposed();
-  gc(); gc(); gc();
-
-
-  // create objects
-  if (verbose) {
-    print("-----------------------------");
-    print("--- construct");
-    print();
-  }
-  for (var i = 0; i < n; i++) {
-    objects[i] = ctor_desc.ctor.apply(ctor_desc, ctor_desc.args(i));
-  }
-
-  try {
-    // use them
-    if (verbose) {
-      print("-----------------------------");
-      print("--- use 1");
-      print();
-    }
-    var use = use_desc.use1;
-    for (var i = 0; i < n; i++) {
-      if (i == 3) %OptimizeFunctionOnNextCall(use);
-      results[i] = use(objects[i], i);
-    }
-
-    // trigger migrations
-    if (verbose) {
-      print("-----------------------------");
-      print("--- trigger migration");
-      print();
-    }
-    var migr = migr_desc.migr;
-    for (var i = 0; i < n; i++) {
-      if (i == 3) %OptimizeFunctionOnNextCall(migr);
-      migr(objects[i], i);
-    }
-
-    // use again
-    if (verbose) {
-      print("-----------------------------");
-      print("--- use 2");
-      print();
-    }
-    var use = use_desc.use2 !== undefined ? use_desc.use2 : use_desc.use1;
-    for (var i = 0; i < n; i++) {
-      if (i == 3) %OptimizeFunctionOnNextCall(use);
-      results[i] = use(objects[i], i);
-      if (verbose >= 2) print(results[i]);
-    }
-
-  } catch (e) {
-    if (verbose) print("--- incompatible use: " + e);
-  }
-  return results;
-}
-
-
-var ctors = [
-  {
-    name: "none-to-double",
-    ctor: function(v) { return {a: v}; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "double",
-    ctor: function(v) { var o = {}; o.a = v; return o; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "none-to-smi",
-    ctor: function(v) { return {a: v}; },
-    args: function(i) { return [i]; },
-  },
-  {
-    name: "smi",
-    ctor: function(v) { var o = {}; o.a = v; return o; },
-    args: function(i) { return [i]; },
-  },
-  {
-    name: "none-to-object",
-    ctor: function(v) { return {a: v}; },
-    args: function(i) { return ["s"]; },
-  },
-  {
-    name: "object",
-    ctor: function(v) { var o = {}; o.a = v; return o; },
-    args: function(i) { return ["s"]; },
-  },
-  {
-    name: "{a:, b:, c:}",
-    ctor: function(v1, v2, v3) { return {a: v1, b: v2, c: v3}; },
-    args: function(i)    { return [1.5 + i, 1.6, 1.7]; },
-  },
-  {
-    name: "{a..h:}",
-    ctor: function(v) { var o = {}; o.h=o.g=o.f=o.e=o.d=o.c=o.b=o.a=v; return o; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "1",
-    ctor: function(v) { var o = 1; o.a = v; return o; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "f()",
-    ctor: function(v) { var o = function() { return v;}; o.a = v; return o; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "f().bind",
-    ctor: function(v) { var o = function(a,b,c) { return a+b+c; }; o = o.bind(o, v, v+1, v+2.2); return o; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "dictionary elements",
-    ctor: function(v) { var o = []; o[1] = v; o[200000] = v; return o; },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "json",
-    ctor: function(v) { var json = '{"a":' + v + ',"b":' + v + '}'; return JSON.parse(json); },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "fast accessors",
-    accessor: {
-        get: function() { return this.a_; },
-        set: function(value) {this.a_ = value; },
-        configurable: true,
-    },
-    ctor: function(v) {
-      var o = {a_:v};
-      Object.defineProperty(o, "a", this.accessor);
-      return o;
-    },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "slow accessor",
-    accessor1: { value: this.a_, configurable: true },
-    accessor2: {
-        get: function() { return this.a_; },
-        set: function(value) {this.a_ = value; },
-        configurable: true,
-    },
-    ctor: function(v) {
-      var o = {a_:v};
-      Object.defineProperty(o, "a", this.accessor1);
-      Object.defineProperty(o, "a", this.accessor2);
-      return o;
-    },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "slow",
-    proto: {},
-    ctor: function(v) {
-      var o = {__proto__: this.proto};
-      o.a = v;
-      for (var i = 0; %HasFastProperties(o); i++) o["f"+i] = v;
-      return o;
-    },
-    args: function(i) { return [1.5 + i]; },
-  },
-  {
-    name: "global",
-    ctor: function(v) { return global; },
-    args: function(i) { return [i]; },
-  },
-];
-
-
-
-var uses = [
-  {
-    name: "o.a+1.0",
-    use1: function(o, i) { return o.a + 1.0; },
-    use2: function(o, i) { return o.a + 1.1; },
-  },
-  {
-    name: "o.b+1.0",
-    use1: function(o, i) { return o.b + 1.0; },
-    use2: function(o, i) { return o.b + 1.1; },
-  },
-  {
-    name: "o[1]+1.0",
-    use1: function(o, i) { return o[1] + 1.0; },
-    use2: function(o, i) { return o[1] + 1.1; },
-  },
-  {
-    name: "o[-1]+1.0",
-    use1: function(o, i) { return o[-1] + 1.0; },
-    use2: function(o, i) { return o[-1] + 1.1; },
-  },
-  {
-    name: "()",
-    use1: function(o, i) { return o() + 1.0; },
-    use2: function(o, i) { return o() + 1.1; },
-  },
-];
-
-
-
-var migrations = [
-  {
-    name: "to smi",
-    migr: function(o, i) { if (i == 0) o.a = 1; },
-  },
-  {
-    name: "to double",
-    migr: function(o, i) { if (i == 0) o.a = 1.1; },
-  },
-  {
-    name: "to object",
-    migr: function(o, i) { if (i == 0) o.a = {}; },
-  },
-  {
-    name: "set prototype {}",
-    migr: function(o, i) { o.__proto__ = {}; },
-  },
-  {
-    name: "%FunctionSetPrototype",
-    migr: function(o, i) { %FunctionSetPrototype(o, null); },
-  },
-  {
-    name: "modify prototype",
-    migr: function(o, i) { if (i == 0) o.__proto__.__proto1__ = [,,,5,,,]; },
-  },
-  {
-    name: "freeze prototype",
-    migr: function(o, i) { if (i == 0) Object.freeze(o.__proto__); },
-  },
-  {
-    name: "delete and re-add property",
-    migr: function(o, i) { var v = o.a; delete o.a; o.a = v; },
-  },
-  {
-    name: "modify prototype",
-    migr: function(o, i) { if (i >= 0) o.__proto__ = {}; },
-  },
-  {
-    name: "set property callback",
-    migr: function(o, i) {
-      Object.defineProperty(o, "a", {
-        get: function() { return 1.5 + i; },
-        set: function(value) {},
-        configurable: true,
-      });
-    },
-  },
-  {
-    name: "observe",
-    migr: function(o, i) { Object.observe(o, function(){}); },
-  },
-  {
-    name: "%EnableAccessChecks",
-    migr: function(o, i) { %EnableAccessChecks(o); },
-  },
-  {
-    name: "%DisableAccessChecks",
-    migr: function(o, i) { if (o !== global) %DisableAccessChecks(o); },
-  },
-  {
-    name: "seal",
-    migr: function(o, i) { Object.seal(o); },
-  },
-  { // Must be the last in the sequence, because after the global object freeze
-    // the other modifications does not make sence.
-    name: "freeze",
-    migr: function(o, i) { Object.freeze(o); },
-  },
-];
-
-
-
-migrations.forEach(function(migr) {
-  uses.forEach(function(use) {
-    ctors.forEach(function(ctor) {
-      test(ctor, use, migr);
-    });
-  });
-});