Narrow cases where Sparse/Smart versions of Array methods are used

test/mjsunit/regress/regress-2615.js

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-var a = [];
-a[0xfffffffe] = 10;
-assertThrows("a.unshift(1);", RangeError);
-assertEquals(0xffffffff, a.length);
-assertEquals(10, a[0xffffffff]);
-assertEquals(undefined, a[0xfffffffe]);
-
-a = [1,2,3];
-a[0xfffffffe] = 10;
-assertThrows("a.splice(1,1,7,7,7,7,7);", RangeError);
-assertEquals([1,7,7,7,7,7,3], a.slice(0, 7));
-assertEquals(0xffffffff, a.length);
-assertEquals(10, a[0xfffffffe + 5 - 1]);
-
 a = [1];
 Object.defineProperty(a, "1", {writable:false, configurable:false, value: 100});
 assertThrows("a.unshift(4);", TypeError);
 assertEquals([1, 100, 100], a);
 var desc = Object.getOwnPropertyDescriptor(a, "1");
 assertEquals(false, desc.writable);
 assertEquals(false, desc.configurable);
 
 a = [1];
 var g = function() { return 100; };
@@ skipping 18 matching lines @@
 a = [1];
 Object.defineProperty(a, "1", {configurable:false, value:10});
 assertThrows("a.splice(1,1);", TypeError);
 assertEquals([1, 10], a);
 desc = Object.getOwnPropertyDescriptor(a, "1");
 assertEquals(false, desc.configurable);
 
 a = [0,1,2,3,4,5,6];
 Object.defineProperty(a, "3", {configurable:false, writable:false, value:3});
 assertThrows("a.splice(1,4);", TypeError);
-assertEquals([0,5,6,3,,,,,], a);
+assertEquals([0,5,6,3,,,,], a);
 desc = Object.getOwnPropertyDescriptor(a, "3");
 assertEquals(false, desc.configurable);
 assertEquals(false, desc.writable);
 
 a = [0,1,2,3,4,5,6];
 Object.defineProperty(a, "5", {configurable:false, value:5});
 assertThrows("a.splice(1,4);", TypeError);
-assertEquals([0,5,6,3,4,5,,,], a);
+assertEquals([0,5,6,3,4,5,,], a);
 desc = Object.getOwnPropertyDescriptor(a, "5");
 assertEquals(false, desc.configurable);
 
 a = [1,2,3,,5];
 Object.defineProperty(a, "1", {configurable:false, writable:true, value:2});
 assertEquals(1, a.shift());
 assertEquals([2,3,,5], a);
 desc = Object.getOwnPropertyDescriptor(a, "1");
 assertEquals(false, desc.configurable);
 assertEquals(true, desc.writable);
 assertThrows("a.shift();", TypeError);
 assertEquals([3,3,,5], a);
 desc = Object.getOwnPropertyDescriptor(a, "1");
 assertEquals(false, desc.configurable);
 assertEquals(true, desc.writable);
 
 a = [1,2,3];
 Object.defineProperty(a, "2", {configurable:false, value:3});
 assertThrows("a.pop();", TypeError);
 assertEquals([1,2,3], a);
 desc = Object.getOwnPropertyDescriptor(a, "2");
 assertEquals(false, desc.configurable);
-
-a = [1,2,,,5];
-Object.defineProperty(a, "4", {writable:true, configurable:false, value:5});
-assertThrows("a.sort();", TypeError);
-assertEquals([1,2,5,,5], a);
-desc = Object.getOwnPropertyDescriptor(a, "2");
-assertEquals(true, desc.configurable);
-desc = Object.getOwnPropertyDescriptor(a, "4");
-assertEquals(false, desc.configurable);
-
-a = [1,2,3,,5,6];
-Object.defineProperty(a, "4", {value:5, writable:false});
-assertThrows("a.sort();", TypeError);
-assertEquals([1,2,3,5,5,6], a);
-desc = Object.getOwnPropertyDescriptor(a, "4");
-assertEquals(false, desc.writable);