76 lines
3.1 KiB
JavaScript
76 lines
3.1 KiB
JavaScript
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// Copyright 2013 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 --smi-only-arrays --expose-gc
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// Flags: --track-allocation-sites --noalways-opt
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// Test element kind of objects.
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// Since --smi-only-arrays affects builtins, its default setting at compile
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// time sticks if built with snapshot. If --smi-only-arrays is deactivated
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// by default, only a no-snapshot build actually has smi-only arrays enabled
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// in this test case. Depending on whether smi-only arrays are actually
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// enabled, this test takes the appropriate code path to check smi-only arrays.
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// support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
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support_smi_only_arrays = true;
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if (support_smi_only_arrays) {
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print("Tests include smi-only arrays.");
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} else {
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print("Tests do NOT include smi-only arrays.");
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}
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if (support_smi_only_arrays) {
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function get_literal(x) {
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var literal = [1, 2, x];
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return literal;
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}
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get_literal(3);
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get_literal(3);
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%OptimizeFunctionOnNextCall(get_literal);
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a = get_literal(3);
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assertTrue(2 != %GetOptimizationStatus(get_literal));
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assertTrue(%HasFastSmiElements(a));
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a[0] = 3.5;
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// We should have transitioned the boilerplate array to double, and
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// crankshafted code should de-opt on the unexpected elements kind
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b = get_literal(3);
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assertTrue(%HasFastDoubleElements(b));
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assertEquals([1, 2, 3], b);
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assertTrue(1 != %GetOptimizationStatus(get_literal));
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// Optimize again
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get_literal(3);
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%OptimizeFunctionOnNextCall(get_literal);
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b = get_literal(3);
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assertTrue(%HasFastDoubleElements(b));
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assertTrue(2 != %GetOptimizationStatus(get_literal));
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}
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