forked from LeenkxTeam/Kmake
68 lines
1.5 KiB
JavaScript
68 lines
1.5 KiB
JavaScript
// Copyright 2024 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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//
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// Flags: --allow-natives-syntax --maglev --no-always-turbofan
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// Flags: --script-context-mutable-heap-number
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// Flags: --maglev-function-context-specialization
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let x = 42;
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x = 4; // making x non-const.
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(function() {
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function g() {}
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%NeverOptimizeFunction(g);
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function foo(a) {
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x = a;
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g(); // Opaque function call to ensure that {x} is reloaded in the line
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// below.
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return x + 2;
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}
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// Should optimize as Smi store.
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%PrepareFunctionForOptimization(foo);
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assertEquals(7, foo(5));
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assertEquals(7, foo(5));
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%OptimizeMaglevOnNextCall(foo);
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assertEquals(7, foo(5));
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assertOptimized(foo);
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// Should deopt/
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assertEquals(6.2, foo(4.2));
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assertUnoptimized(foo);
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})();
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let y = 42;
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y = 4; // making x non-const.
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(function() {
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function g() {}
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%NeverOptimizeFunction(g);
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function foo(a) {
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y = a;
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g(); // Opaque function call to ensure that {x} is reloaded in the line
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// below.
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return y + 2;
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}
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// Should optimize as MutableHeapStore store.
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%PrepareFunctionForOptimization(foo);
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assertEquals(7.2, foo(5.2));
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assertEquals(7.2, foo(5.2));
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%OptimizeMaglevOnNextCall(foo);
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assertEquals(7.2, foo(5.2));
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assertOptimized(foo);
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// Shouldn't deopt. Since we emit
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// CheckedNumberOrOddballToFloat64 before the StoreDoubleField call.
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assertEquals(44, foo(42));
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assertOptimized(foo); // Still optimized.
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})();
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