| // 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 |
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| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Flags: --allow-natives-syntax --smi-only-arrays --expose-gc |
| // Flags: --noalways-opt |
| |
| // Test element kind of objects. |
| // Since --smi-only-arrays affects builtins, its default setting at compile |
| // time sticks if built with snapshot. If --smi-only-arrays is deactivated |
| // by default, only a no-snapshot build actually has smi-only arrays enabled |
| // in this test case. Depending on whether smi-only arrays are actually |
| // enabled, this test takes the appropriate code path to check smi-only arrays. |
| |
| // support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); |
| support_smi_only_arrays = true; |
| |
| if (support_smi_only_arrays) { |
| print("Tests include smi-only arrays."); |
| } else { |
| print("Tests do NOT include smi-only arrays."); |
| } |
| |
| var elements_kind = { |
| fast_smi_only : 'fast smi only elements', |
| fast : 'fast elements', |
| fast_double : 'fast double elements', |
| dictionary : 'dictionary elements', |
| external_byte : 'external byte elements', |
| external_unsigned_byte : 'external unsigned byte elements', |
| external_short : 'external short elements', |
| external_unsigned_short : 'external unsigned short elements', |
| external_int : 'external int elements', |
| external_unsigned_int : 'external unsigned int elements', |
| external_float : 'external float elements', |
| external_double : 'external double elements', |
| external_pixel : 'external pixel elements' |
| } |
| |
| function getKind(obj) { |
| if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; |
| if (%HasFastObjectElements(obj)) return elements_kind.fast; |
| if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; |
| if (%HasDictionaryElements(obj)) return elements_kind.dictionary; |
| } |
| |
| function isHoley(obj) { |
| if (%HasFastHoleyElements(obj)) return true; |
| return false; |
| } |
| |
| function assertKind(expected, obj, name_opt) { |
| if (!support_smi_only_arrays && |
| expected == elements_kind.fast_smi_only) { |
| expected = elements_kind.fast; |
| } |
| assertEquals(expected, getKind(obj), name_opt); |
| } |
| |
| if (support_smi_only_arrays) { |
| |
| function get_literal(x) { |
| var literal = [1, 2, x]; |
| return literal; |
| } |
| |
| get_literal(3); |
| // It's important to store a from before we crankshaft get_literal, because |
| // mementos won't be created from crankshafted code at all. |
| a = get_literal(3); |
| %OptimizeFunctionOnNextCall(get_literal); |
| get_literal(3); |
| assertOptimized(get_literal); |
| assertTrue(%HasFastSmiElements(a)); |
| // a has a memento so the transition caused by the store will affect the |
| // boilerplate. |
| a[0] = 3.5; |
| |
| // We should have transitioned the boilerplate array to double, and |
| // crankshafted code should de-opt on the unexpected elements kind |
| b = get_literal(3); |
| assertTrue(%HasFastDoubleElements(b)); |
| assertEquals([1, 2, 3], b); |
| assertUnoptimized(get_literal); |
| |
| // Optimize again |
| get_literal(3); |
| %OptimizeFunctionOnNextCall(get_literal); |
| b = get_literal(3); |
| assertTrue(%HasFastDoubleElements(b)); |
| assertOptimized(get_literal); |
| |
| |
| // Test: make sure allocation site information is updated through a |
| // transition from SMI->DOUBLE->FAST |
| (function() { |
| function bar(a, b, c) { |
| return [a, b, c]; |
| } |
| |
| a = bar(1, 2, 3); |
| a[0] = 3.5; |
| a[1] = 'hi'; |
| b = bar(1, 2, 3); |
| assertKind(elements_kind.fast, b); |
| })(); |
| } |