| // Copyright 2012 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. |
| |
| // Flags: --allow-natives-syntax --smi-only-arrays --expose-gc |
| |
| // Limit the number of stress runs to reduce polymorphism it defeats some of the |
| // assumptions made about how elements transitions work because transition stubs |
| // end up going generic. |
| // Flags: --stress-runs=2 |
| |
| // 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. |
| |
| // Reset the GC stress mode to be off. Needed because AllocationMementos only |
| // live for one gc, so a gc that happens in certain fragile areas of the test |
| // can break assumptions. |
| %SetFlags("--gc-interval=-1") |
| |
| support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); |
| |
| 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; |
| // Every external kind is also an external array. |
| assertTrue(%HasExternalArrayElements(obj)); |
| if (%HasExternalByteElements(obj)) { |
| return elements_kind.external_byte; |
| } |
| if (%HasExternalUnsignedByteElements(obj)) { |
| return elements_kind.external_unsigned_byte; |
| } |
| if (%HasExternalShortElements(obj)) { |
| return elements_kind.external_short; |
| } |
| if (%HasExternalUnsignedShortElements(obj)) { |
| return elements_kind.external_unsigned_short; |
| } |
| if (%HasExternalIntElements(obj)) { |
| return elements_kind.external_int; |
| } |
| if (%HasExternalUnsignedIntElements(obj)) { |
| return elements_kind.external_unsigned_int; |
| } |
| if (%HasExternalFloatElements(obj)) { |
| return elements_kind.external_float; |
| } |
| if (%HasExternalDoubleElements(obj)) { |
| return elements_kind.external_double; |
| } |
| if (%HasExternalPixelElements(obj)) { |
| return elements_kind.external_pixel; |
| } |
| } |
| |
| 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); |
| } |
| |
| // long-running loop forces OSR. |
| %NeverOptimizeFunction(construct_smis); |
| %NeverOptimizeFunction(construct_doubles); |
| %NeverOptimizeFunction(convert_mixed); |
| for (var i = 0; i < 1000000; i++) { } |
| |
| if (support_smi_only_arrays) { |
| // This code exists to eliminate the learning influence of AllocationSites |
| // on the following tests. |
| var __sequence = 0; |
| function make_array_string() { |
| this.__sequence = this.__sequence + 1; |
| return "/* " + this.__sequence + " */ [0, 0, 0];" |
| } |
| function make_array() { |
| return eval(make_array_string()); |
| } |
| |
| function construct_smis() { |
| var a = make_array(); |
| a[0] = 0; // Send the COW array map to the steak house. |
| assertKind(elements_kind.fast_smi_only, a); |
| return a; |
| } |
| function construct_doubles() { |
| var a = construct_smis(); |
| a[0] = 1.5; |
| assertKind(elements_kind.fast_double, a); |
| return a; |
| } |
| |
| // Test transition chain SMI->DOUBLE->FAST (crankshafted function will |
| // transition to FAST directly). |
| function convert_mixed(array, value, kind) { |
| array[1] = value; |
| assertKind(kind, array); |
| assertEquals(value, array[1]); |
| } |
| smis = construct_smis(); |
| convert_mixed(smis, 1.5, elements_kind.fast_double); |
| |
| doubles = construct_doubles(); |
| convert_mixed(doubles, "three", elements_kind.fast); |
| |
| convert_mixed(construct_smis(), "three", elements_kind.fast); |
| convert_mixed(construct_doubles(), "three", elements_kind.fast); |
| |
| smis = construct_smis(); |
| doubles = construct_doubles(); |
| convert_mixed(smis, 1, elements_kind.fast); |
| convert_mixed(doubles, 1, elements_kind.fast); |
| assertTrue(%HaveSameMap(smis, doubles)); |
| } |
| |
| // Throw away type information in the ICs for next stress run. |
| gc(); |