30 lines
679 B
JavaScript
30 lines
679 B
JavaScript
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// Copyright 2019 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 --no-always-opt
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let g = 0;
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function f(x) {
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let y = BigInt.asUintN(64, 15n);
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// Introduce a side effect to force the construction of a FrameState that
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// captures the value of y.
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g = 42;
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try {
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return x + y;
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} catch(_) {
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return y;
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}
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}
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%PrepareFunctionForOptimization(f);
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assertEquals(16n, f(1n));
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assertEquals(17n, f(2n));
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%OptimizeFunctionOnNextCall(f);
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assertEquals(16n, f(1n));
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assertOptimized(f);
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assertEquals(15n, f(0));
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assertUnoptimized(f);
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