[strong] cache strong object literal maps

test/mjsunit/strong/literals.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --strong-mode --allow-natives-syntax
 // Flags: --harmony-arrow-functions --harmony-rest-parameters
+// Flags: --harmony-destructuring
 
+'use strict';
 
 (function WeakObjectLiterals() {
   assertTrue(!%IsStrong({}));
   assertTrue(!%IsStrong({a: 0, b: 0}));
+  assertTrue(!%IsStrong({a: [], b: {}}));
+  assertTrue(!%IsStrong({a: [], b: {}}.a));
+  assertTrue(!%IsStrong({a: [], b: {}}.b));
+  assertTrue(!%IsStrong({a: {b: {c: {}}}}.a));
+  assertTrue(!%IsStrong({a: {b: {c: {}}}}.a.b));
+  assertTrue(!%IsStrong({a: {b: {c: {}}}}.a.b.c));
   assertTrue(!%IsStrong({f: function(){}}));
   assertTrue(!%IsStrong(Realm.eval(Realm.current(),
                                    "({f: function(){}})")));
 })();
 
 (function StrongObjectLiterals() {
   'use strong';
   assertTrue(%IsStrong({}));
   assertTrue(%IsStrong({a: 0, b: 0}));
+  assertTrue(%IsStrong({a: [], b: {}}));
+  assertTrue(%IsStrong({a: [], b: {}}.a));
+  assertTrue(%IsStrong({a: [], b: {}}.b));
+  assertTrue(%IsStrong({a: {b: {c: {}}}}.a));
+  assertTrue(%IsStrong({a: {b: {c: {}}}}.a.b));
+  assertTrue(%IsStrong({a: {b: {c: {}}}}.a.b.c));
+  // Maps for literals with too many properties are not cached.
+  assertTrue(%IsStrong({
+    x001: 0, x002: 0, x003: 0, x004: 0, x005: 0,
+    x006: 0, x007: 0, x008: 0, x009: 0, x010: 0,
+    x011: 0, x012: 0, x013: 0, x014: 0, x015: 0,
+    x016: 0, x017: 0, x018: 0, x019: 0, x020: 0,
+    x021: 0, x022: 0, x023: 0, x024: 0, x025: 0,
+    x026: 0, x027: 0, x028: 0, x029: 0, x030: 0,
+    x031: 0, x032: 0, x033: 0, x034: 0, x035: 0,
+    x036: 0, x037: 0, x038: 0, x039: 0, x040: 0,
+    x041: 0, x042: 0, x043: 0, x044: 0, x045: 0,
+    x046: 0, x047: 0, x048: 0, x049: 0, x050: 0,
+    x051: 0, x052: 0, x053: 0, x054: 0, x055: 0,
+    x056: 0, x057: 0, x058: 0, x059: 0, x060: 0,
+    x061: 0, x062: 0, x063: 0, x064: 0, x065: 0,
+    x066: 0, x067: 0, x068: 0, x069: 0, x070: 0,
+    x071: 0, x072: 0, x073: 0, x074: 0, x075: 0,
+    x076: 0, x077: 0, x078: 0, x079: 0, x080: 0,
+    x081: 0, x082: 0, x083: 0, x084: 0, x085: 0,
+    x086: 0, x087: 0, x088: 0, x089: 0, x090: 0,
+    x091: 0, x092: 0, x093: 0, x094: 0, x095: 0,
+    x096: 0, x097: 0, x098: 0, x099: 0, x100: 0,
+    x101: 0, x102: 0, x103: 0, x104: 0, x105: 0,
+    x106: 0, x107: 0, x108: 0, x109: 0, x110: 0,
+    x111: 0, x112: 0, x113: 0, x114: 0, x115: 0,
+    x116: 0, x117: 0, x118: 0, x119: 0, x120: 0,
+    x121: 0, x122: 0, x123: 0, x124: 0, x125: 0,
+    x126: 0, x127: 0, x128: 0, x129: 0, x130: 0,
+    x131: 0, x132: 0, x133: 0, x134: 0, x135: 0,
+    x136: 0, x137: 0, x138: 0, x139: 0, x140: 0,
+    x141: 0, x142: 0, x143: 0, x144: 0, x145: 0,
+    x146: 0, x147: 0, x148: 0, x149: 0, x150: 0,
+    x151: 0, x152: 0, x153: 0, x154: 0, x155: 0,
+    x156: 0, x157: 0, x158: 0, x159: 0, x160: 0,
+    x161: 0, x162: 0, x163: 0, x164: 0, x165: 0,
+    x166: 0, x167: 0, x168: 0, x169: 0, x170: 0,
+    x171: 0, x172: 0, x173: 0, x174: 0, x175: 0,
+    x176: 0, x177: 0, x178: 0, x179: 0, x180: 0,
+    x181: 0, x182: 0, x183: 0, x184: 0, x185: 0,
+    x186: 0, x187: 0, x188: 0, x189: 0, x190: 0,
+    x191: 0, x192: 0, x193: 0, x194: 0, x195: 0,
+    x196: 0, x197: 0, x198: 0, x199: 0, x200: 0,
+  }));
   assertTrue(%IsStrong({__proto__: {}, get a() {}, set b(x) {}}));
   assertTrue(%IsStrong({[Date() + ""]: 0, [Symbol()]: 0}));
-  // TODO(rossberg): super does not work yet
-  // assertTrue(%IsStrong({m() { super.m() }}));
+  assertTrue(%IsStrong({m() { super.m() }}));
   // Object literals with constant functions are treated specially,
-  // but currently only on the toplevel.
+  // but currently only on the toplevel (using Realm.eval to emulate that).
   assertTrue(%IsStrong({f: function(){}}));
-  // TODO(rossberg): implement strong object literals with functions
-  // assertTrue(%IsStrong(Realm.eval(Realm.current(),
-  //                      "'use strong'; ({f: function(){}})")));
+  assertTrue(%IsStrong(Realm.eval(Realm.current(),
+                       "'use strong'; ({f: function(){}})")));
 })();
 
 (function WeakArrayLiterals(...args) {
+  let [...r] = [];
   assertTrue(!%IsStrong(args));
+  assertTrue(!%IsStrong(r));
   assertTrue(!%IsStrong([]));
   assertTrue(!%IsStrong([1, 2, 3]));
-  Array.prototype = {}
-  assertTrue(!%IsStrong([]));
-  assertTrue(!%IsStrong([1, 2, 3]));
+  assertTrue(!%IsStrong([[[]]]));
+  assertTrue(!%IsStrong([[1], {}, [[3]]]));
+  assertTrue(!%IsStrong([[1], {}, [[3]]][0]));
+  assertTrue(!%IsStrong([[1], {}, [[3]]][1]));
+  assertTrue(!%IsStrong([[1], {}, [[3]]][2]));
+  assertTrue(!%IsStrong([[1], {}, [[3]]][2][0]));
 })();
 
 (function StrongArrayLiterals(...args) {
   'use strong';
-  // TODO(rossberg): implement strong array literals
+  let [...r] = [];
+  // TODO(rossberg): teach strongness to FastCloneShallowArrayStub
   // assertTrue(%IsStrong(args));
+  // assertTrue(%IsStrong(r));
   // assertTrue(%IsStrong([]));
   // assertTrue(%IsStrong([1, 2, 3]));
-  // Array.prototype = {}
-  // assertTrue(%IsStrong([]));
-  // assertTrue(%IsStrong([1, 2, 3]));
-})(0);  // TODO(arv): drop dummy
+  // assertTrue(%IsStrong([1, 2, ...[3, 4], 5]));
+  assertTrue(%IsStrong([[[]]]));
+  assertTrue(%IsStrong([[1], {}, [[3]]]));
+  assertTrue(%IsStrong([[1], {}, [[3]]][0]));
+  assertTrue(%IsStrong([[1], {}, [[3]]][1]));
+  assertTrue(%IsStrong([[1], {}, [[3]]][2]));
+  assertTrue(%IsStrong([[1], {}, [[3]]][2][0]));
+})();
 
 (function WeakFunctionLiterals() {
   function f() {}
   assertTrue(!%IsStrong(f));
   assertTrue(!%IsStrong(function(){}));
+  assertTrue(!%IsStrong(function f(){}));
   assertTrue(!%IsStrong(() => {}));
   assertTrue(!%IsStrong(x => x));
-})();
-
-(function StrongFunctionLiterals(g) {
+  assertTrue(!%IsStrong({m(){}}.m));
+  assertTrue(!%IsStrong(Object.getOwnPropertyDescriptor(
+      {get a(){}}, 'a').get));
+  assertTrue(!%IsStrong(Object.getOwnPropertyDescriptor(
+      {set a(x){}}, 'a').set));
+  assertTrue(!%IsStrong((class {static m(){}}).m));
+  assertTrue(!%IsStrong(Object.getOwnPropertyDescriptor(
+      class {static get a(){}}, 'a').get));
+  assertTrue(!%IsStrong(Object.getOwnPropertyDescriptor(
+      class {static set a(x){}}, 'a').set));
+  assertTrue(!%IsStrong((new class {m(){}}).m));
+  assertTrue(!%IsStrong(Object.getOwnPropertyDescriptor(
+      (class {get a(){}}).prototype, 'a').get));
+  assertTrue(!%IsStrong(Object.getOwnPropertyDescriptor(
+      (class {set a(x){}}).prototype, 'a').set));
+})();
+
+(function StrongFunctionLiterals() {
   'use strong';
   function f() {}
   assertTrue(%IsStrong(f));
-  assertTrue(%IsStrong(g));
   assertTrue(%IsStrong(function(){}));
+  assertTrue(%IsStrong(function f(){}));
   assertTrue(%IsStrong(() => {}));
   assertTrue(%IsStrong(x => x));
-})(function() { 'use strong' });
+  assertTrue(%IsStrong({m(){}}.m));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      {get a(){}}, 'a').get));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      {set a(x){}}, 'a').set));
+  assertTrue(%IsStrong((class {static m(){}}).m));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      class {static get a(){}}, 'a').get));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      class {static set a(x){}}, 'a').set));
+  assertTrue(%IsStrong((new class {m(){}}).m));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      (class {get a(){}}).prototype, 'a').get));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      (class {set a(x){}}).prototype, 'a').set));
+})();
+
+(function SelfStrongFunctionLiterals() {
+  function f() {'use strong'}
+  assertTrue(%IsStrong(f));
+  assertTrue(%IsStrong(function(){'use strong'}));
+  assertTrue(%IsStrong(function f(){'use strong'}));
+  assertTrue(%IsStrong(() => {'use strong'}));
+  assertTrue(%IsStrong(x => {'use strong'}));
+  assertTrue(%IsStrong({m(){'use strong'}}.m));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      {get a(){'use strong'}}, 'a').get));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      {set a(x){'use strong'}}, 'a').set));
+  assertTrue(%IsStrong((class {static m(){'use strong'}}).m));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      class {static get a(){'use strong'}}, 'a').get));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      class {static set a(x){'use strong'}}, 'a').set));
+  assertTrue(%IsStrong((new class {m(){'use strong'}}).m));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      (class {get a(){'use strong'}}).prototype, 'a').get));
+  assertTrue(%IsStrong(Object.getOwnPropertyDescriptor(
+      (class {set a(x){'use strong'}}).prototype, 'a').set));
+})();
+
+(function WeakGeneratorLiterals() {
+  function* g() {}
+  assertTrue(!%IsStrong(g));
+  assertTrue(!%IsStrong(function*(){}));
+  assertTrue(!%IsStrong(function* g(){}));
+  assertTrue(!%IsStrong({*m(){}}.m));
+  assertTrue(!%IsStrong((class {static *m(){}}).m));
+  assertTrue(!%IsStrong((new class {*m(){}}).m));
+})();
+
+(function StrongGeneratorLiterals() {
+  'use strong';
+  function* g() {}
+  assertTrue(%IsStrong(g));
+  assertTrue(%IsStrong(function*(){}));
+  assertTrue(%IsStrong(function* g(){}));
+  assertTrue(%IsStrong({*m(){}}.m));
+  assertTrue(%IsStrong((class {static *m(){}}).m));
+  assertTrue(%IsStrong((new class {*m(){}}).m));
+})();
+
+(function SelfStrongGeneratorLiterals() {
+  function* g() {'use strong'}
+  assertTrue(%IsStrong(g));
+  assertTrue(%IsStrong(function*(){'use strong'}));
+  assertTrue(%IsStrong(function* g(){'use strong'}));
+  assertTrue(%IsStrong({*m(){'use strong'}}.m));
+  assertTrue(%IsStrong((class {static *m(){'use strong'}}).m));
+  assertTrue(%IsStrong((new class {*m(){'use strong'}}).m));
+})();
+
+(function WeakClassLiterals() {
+  function assertWeakClass(C) {
+    assertTrue(!%IsStrong(C));
+    assertTrue(!%IsStrong(C.prototype));
+  }
+  class C {};
+  class D extends C {};
+  class E extends Object {};
+  class F extends null {};
+  const S = (() => {'use strong'; return class {}})();
+  class G extends S {};
+  assertWeakClass(C);
+  assertWeakClass(D);
+  assertWeakClass(E);
+  assertWeakClass(F);
+  assertWeakClass(G);
+  assertWeakClass(class {});
+  assertWeakClass(class extends Object {});
+  assertWeakClass(class extends null {});
+  assertWeakClass(class extends C {});
+  assertWeakClass(class extends S {});
+  assertWeakClass(class extends class {} {});
+  assertWeakClass(class C {});
+  assertWeakClass(class D extends Object {});
+  assertWeakClass(class D extends null {});
+  assertWeakClass(class D extends C {});
+  assertWeakClass(class D extends S {});
+  assertWeakClass(class D extends class {} {});
+})();
+
+(function StrongClassLiterals() {
+  'use strong';
+  function assertStrongClass(C) {
+    assertTrue(%IsStrong(C));
+    // TODO(rossberg): prototype object is not yet strongified
+    // assertTrue(%IsStrong(C.prototype));
+  }
+  class C {};
+  class D extends C {};
+  class E extends Object {};
+  class F extends null {};
+  const W = (1, eval)(() => {'use strict'; return class {}})();
+  class G extends W {};
+  assertStrongClass(C);
+  assertStrongClass(D);
+  assertStrongClass(E);
+  assertStrongClass(F);
+  assertStrongClass(G);
+  assertStrongClass(class {});
+  assertStrongClass(class extends Object {});
+  assertStrongClass(class extends null {});
+  assertStrongClass(class extends C {});
+  assertStrongClass(class extends W {});
+  assertStrongClass(class extends class {} {});
+  assertStrongClass(class C {});
+  assertStrongClass(class D extends Object {});
+  assertStrongClass(class D extends null {});
+  assertStrongClass(class D extends C {});
+  assertStrongClass(class D extends W {});
+  assertStrongClass(class D extends class {} {});
+})();
 
 (function WeakRegExpLiterals() {
   assertTrue(!%IsStrong(/abc/));
 })();
 
 (function StrongRegExpLiterals() {
   'use strong';
   // TODO(rossberg): implement strong regexp literals
   // assertTrue(%IsStrong(/abc/));
 })();