1dd2b094a5
This extends the current support for nested object literals we already have in Crankshaft, to also support nested array literals and mixed nested literals containing arrays and objects. All three types are generated by the unified HFastLiteral instruction. All previous upper bounds on nested literal graphs remain unchanged, keeping the size of generated code in check. The main intention is to boost performance of two-dimensional array literals containing constant elements (aka. matrices). R=danno@chromium.org TEST=mjsunit/compiler/literals-optimized Review URL: https://chromiumcodereview.appspot.com/9403018 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10734 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
122 lines
4.1 KiB
JavaScript
122 lines
4.1 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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// Test optimized versions of array and object literals.
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function TestOptimizedLiteral(create, verify) {
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verify(create(1, 2, 3), 1, 2, 3);
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verify(create(3, 5, 7), 3, 5, 7);
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%OptimizeFunctionOnNextCall(create);
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verify(create(11, 23, 42), 11, 23, 42);
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}
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// Test shallow array literal.
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function create_arr_shallow(a, b, c) {
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return [0, a, 0, b, 0, c];
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}
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function verify_arr_shallow(array, a, b, c) {
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assertSame(6, array.length);
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assertSame(0, array[0]);
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assertSame(a, array[1]);
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assertSame(0, array[2]);
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assertSame(b, array[3]);
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assertSame(0, array[4]);
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assertSame(c, array[5]);
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}
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TestOptimizedLiteral(create_arr_shallow, verify_arr_shallow);
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// Test nested array literal.
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function create_arr_nested(a, b, c) {
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return [[0, a], [b, c], [1, 2], 3];
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}
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function verify_arr_nested(array, a, b, c) {
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assertSame(4, array.length);
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assertSame(2, array[0].length);
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assertSame(0, array[0][0]);
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assertSame(a, array[0][1]);
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assertSame(2, array[1].length);
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assertSame(b, array[1][0]);
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assertSame(c, array[1][1]);
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assertSame(2, array[2].length);
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assertSame(1, array[2][0]);
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assertSame(2, array[2][1]);
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assertSame(3, array[3]);
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}
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TestOptimizedLiteral(create_arr_nested, verify_arr_nested);
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// Test shallow object literal.
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function create_obj_shallow(a, b, c) {
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return { x:a, y:b, z:c, v:'foo', 9:'bar' };
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}
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function verify_obj_shallow(object, a, b, c) {
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assertSame(a, object.x);
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assertSame(b, object.y);
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assertSame(c, object.z);
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assertSame('foo', object.v);
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assertSame('bar', object[9]);
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}
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TestOptimizedLiteral(create_obj_shallow, verify_obj_shallow);
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// Test nested object literal.
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function create_obj_nested(a, b, c) {
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return { x:{ v:a, w:b }, y:{ v:1, w:2 }, z:c, v:'foo', 9:'bar' };
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}
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function verify_obj_nested(object, a, b, c) {
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assertSame(a, object.x.v);
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assertSame(b, object.x.w);
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assertSame(1, object.y.v);
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assertSame(2, object.y.w);
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assertSame(c, object.z);
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assertSame('foo', object.v);
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assertSame('bar', object[9]);
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}
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TestOptimizedLiteral(create_obj_nested, verify_obj_nested);
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// Test mixed array and object literal.
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function create_mixed_nested(a, b, c) {
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return { x:[1, 2], y:[a, b], z:c, v:{ v:'foo' }, 9:'bar' };
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}
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function verify_mixed_nested(object, a, b, c) {
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assertSame(2, object.x.length);
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assertSame(1, object.x[0]);
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assertSame(2, object.x[1]);
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assertSame(2, object.y.length);
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assertSame(a, object.y[0]);
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assertSame(b, object.y[1]);
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assertSame(c, object.z);
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assertSame('foo', object.v.v);
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assertSame('bar', object[9]);
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}
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TestOptimizedLiteral(create_mixed_nested, verify_mixed_nested);
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