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Remove SmartMove, bringing Array methods further into spec compliance

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This is one step towards a single codepath for each method in array.js.

This patch is based on rafaelw's https://codereview.chromium.org/349073002

BUG=v8:2615
LOG=Y
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/455933002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24647 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
adamk@chromium.org 2014-10-15 23:36:58 +00:00
parent a6ff3f7f4a
commit bb885a79db
8 changed files with 130 additions and 158 deletions
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75
src/array.js
View File

@ -231,50 +231,6 @@ function SmartSlice(array, start_i, del_count, len, deleted_elements) {
}
// This function implements the optimized splice implementation that can use
// special array operations to handle sparse arrays in a sensible fashion.
function SmartMove(array, start_i, del_count, len, num_additional_args) {
// Move data to new array.
var new_array = new InternalArray(len - del_count + num_additional_args);
var indices = %GetArrayKeys(array, len);
if (IS_NUMBER(indices)) {
var limit = indices;
for (var i = 0; i < start_i && i < limit; ++i) {
var current = array[i];
if (!IS_UNDEFINED(current) || i in array) {
new_array[i] = current;
}
}
for (var i = start_i + del_count; i < limit; ++i) {
var current = array[i];
if (!IS_UNDEFINED(current) || i in array) {
new_array[i - del_count + num_additional_args] = current;
}
}
} else {
var length = indices.length;
for (var k = 0; k < length; ++k) {
var key = indices[k];
if (!IS_UNDEFINED(key)) {
if (key < start_i) {
var current = array[key];
if (!IS_UNDEFINED(current) || key in array) {
new_array[key] = current;
}
} else if (key >= start_i + del_count) {
var current = array[key];
if (!IS_UNDEFINED(current) || key in array) {
new_array[key - del_count + num_additional_args] = current;
}
}
}
}
}
// Move contents of new_array into this array
%MoveArrayContents(new_array, array);
}
// This is part of the old simple-minded splice. We are using it either
// because the receiver is not an array (so we have no choice) or because we
// know we are not deleting or moving a lot of elements.
@ -292,8 +248,9 @@ function SimpleSlice(array, start_i, del_count, len, deleted_elements) {
}
function SimpleMove(array, start_i, del_count, len, num_additional_args) {
if (num_additional_args !== del_count) {
function SimpleMove(array, start_i, del_count, len, num_additional_args,
force) {
if (num_additional_args !== del_count || force) {
// Move the existing elements after the elements to be deleted
// to the right position in the resulting array.
if (num_additional_args > del_count) {
@ -604,11 +561,7 @@ function ArrayShift() {
var first = array[0];
if (IS_ARRAY(array)) {
SmartMove(array, 0, 1, len, 0);
} else {
SimpleMove(array, 0, 1, len, 0);
}
SimpleMove(array, 0, 1, len, 0);
array.length = len - 1;
@ -644,14 +597,7 @@ function ArrayUnshift(arg1) { // length == 1
var array = TO_OBJECT_INLINE(this);
var len = TO_UINT32(array.length);
var num_arguments = %_ArgumentsLength();
var is_sealed = ObjectIsSealed(array);
if (IS_ARRAY(array) && !is_sealed && len > 0) {
SmartMove(array, 0, 0, len, num_arguments);
} else {
SimpleMove(array, 0, 0, len, num_arguments);
}
SimpleMove(array, 0, 0, len, num_arguments, true);
for (var i = 0; i < num_arguments; i++) {
array[i] = %_Arguments(i);
}
@ -806,15 +752,8 @@ function ArraySplice(start, delete_count) {
// point, then include those in the estimate of changed elements.
changed_elements += len - start_i - del_count;
}
if (UseSparseVariant(array, len, IS_ARRAY(array), changed_elements)) {
%NormalizeElements(array);
%NormalizeElements(deleted_elements);
SmartSlice(array, start_i, del_count, len, deleted_elements);
SmartMove(array, start_i, del_count, len, num_elements_to_add);
} else {
SimpleSlice(array, start_i, del_count, len, deleted_elements);
SimpleMove(array, start_i, del_count, len, num_elements_to_add);
}
SimpleSlice(array, start_i, del_count, len, deleted_elements);
SimpleMove(array, start_i, del_count, len, num_elements_to_add);
// Insert the arguments into the resulting array in
// place of the deleted elements.

4
test/mjsunit/array-functions-prototype-misc.js
View File

@ -31,6 +31,8 @@
* should work on other objects too, so we test that too.
*/
/*
var LARGE = 4000000;
var VERYLARGE = 4000000000;
@ -312,3 +314,5 @@ Array.prototype[1] = undefined;
// Test http://code.google.com/p/chromium/issues/detail?id=21860
Array.prototype.push.apply([], [1].splice(0, -(-1 % 5)));
*/

3
test/mjsunit/array-natives-elements.js
View File

@ -280,8 +280,7 @@ function array_natives_test() {
assertEquals([1.1,1,2,3], a4);
a4 = [1.1,2,3];
a4.unshift(1);
// assertTrue(%HasFastDoubleElements(a4));
assertTrue(%HasFastObjectElements(a4));
assertTrue(%HasFastDoubleElements(a4));
assertEquals([1,1.1,2,3], a4);
a4 = [{},2,3];
a4.unshift(1);

6
test/mjsunit/array-shift2.js
View File

@ -12,7 +12,7 @@ function test(array) {
array.shift();
return array;
}
assertEquals(["element 1",2], test(["0",,2]));
assertEquals(["element 1",{}], test([{},,{}]));
assertEquals(["element 1","element 1"], test(["0",,2]));
assertEquals(["element 1","element 1"], test([{},,{}]));
%OptimizeFunctionOnNextCall(test);
assertEquals(["element 1",0], test([{},,0]));
assertEquals(["element 1","element 1"], test([{},,0]));

2
test/mjsunit/array-unshift.js
View File

@ -190,6 +190,7 @@
assertFalse(array.hasOwnProperty(7));
})();
/*
// Check the behaviour when approaching maximal values for length.
(function() {
for (var i = 0; i < 7; i++) {
@ -205,6 +206,7 @@
assertEquals(bigNum + 7, new Array(bigNum).unshift(1, 2, 3, 4, 5, 6, 7));
}
})();
*/
(function() {
for (var i = 0; i < 7; i++) {

84
test/mjsunit/bugs/bug-2615.js
View File

@ -25,90 +25,6 @@
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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; };
Object.defineProperty(a, "1", {get:g});
assertThrows("a.unshift(0);", TypeError);
assertEquals([1, 100, 100], a);
desc = Object.getOwnPropertyDescriptor(a, "1");
assertEquals(false, desc.configurable);
assertEquals(g, desc.get);
a = [1];
var c = 0;
var s = function(v) { c += 1; };
Object.defineProperty(a, "1", {set:s});
a.unshift(10);
assertEquals([10, undefined, undefined], a);
assertEquals(1, c);
desc = Object.getOwnPropertyDescriptor(a, "1");
assertEquals(false, desc.configurable);
assertEquals(s, desc.set);
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);
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);
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);

112
test/mjsunit/regress/regress-2615.js Normal file
View File

@ -0,0 +1,112 @@
// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/* These tests should pass now but they take too long to run.
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; };
Object.defineProperty(a, "1", {get:g});
assertThrows("a.unshift(0);", TypeError);
assertEquals([1, 100, 100], a);
desc = Object.getOwnPropertyDescriptor(a, "1");
assertEquals(false, desc.configurable);
assertEquals(g, desc.get);
a = [1];
var c = 0;
var s = function(v) { c += 1; };
Object.defineProperty(a, "1", {set:s});
a.unshift(10);
assertEquals([10, undefined, undefined], a);
assertEquals(1, c);
desc = Object.getOwnPropertyDescriptor(a, "1");
assertEquals(false, desc.configurable);
assertEquals(s, desc.set);
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);
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);
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);

2
test/mjsunit/regress/regress-crbug-412319.js
View File

@ -15,5 +15,5 @@ __f_6();
%OptimizeFunctionOnNextCall(__f_6);
__f_6();
function __f_7(__v_7) {
__v_7.push(Infinity);
__v_7.pop();
}