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46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --opt
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// Test that NumberToBoolean properly passes the kIdentifyZeros truncation
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// for Signed32 \/ MinusZero inputs.
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(function() {
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function foo(x) {
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if (x * -2) return 1;
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return 0;
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}
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assertEquals(1, foo(1));
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assertEquals(1, foo(2));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(1, foo(1));
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assertEquals(1, foo(2));
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assertOptimized(foo);
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// Now `foo` should stay optimized even if `x * -2` would produce `-0`.
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assertEquals(0, foo(0));
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assertOptimized(foo);
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})();
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// Test that NumberToBoolean properly passes the kIdentifyZeros truncation
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// for Unsigned32 \/ MinusZero inputs.
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(function() {
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function foo(x) {
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x = x | 0;
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if (Math.max(x * -2, 0)) return 1;
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return 0;
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}
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assertEquals(1, foo(-1));
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assertEquals(1, foo(-2));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(1, foo(-1));
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assertEquals(1, foo(-2));
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assertOptimized(foo);
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// Now `foo` should stay optimized even if `x * -2` would produce `-0`.
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assertEquals(0, foo(0));
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assertOptimized(foo);
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})();
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