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2dcc3665ab
PR-URL: https://github.com/nodejs/node/pull/28016 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
83 lines
2.3 KiB
JavaScript
83 lines
2.3 KiB
JavaScript
// 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 --modify-field-representation-inplace
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// Flags: --no-always-opt --opt
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// Test that code embedding accesses to a Smi field gets properly
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// deoptimized if s->t field representation changes are done in-place.
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(function() {
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function O(x) { this.x = x; }
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function foo(o) { return o.x; }
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%PrepareFunctionForOptimization(foo);
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// We need to keep an instance around to make the GC stress testing work.
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const o1 = new O(1);
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foo(o1);
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foo(new O(2));
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%OptimizeFunctionOnNextCall(foo);
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foo(new O(3));
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assertOptimized(foo);
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new O(null);
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assertUnoptimized(foo);
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})();
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// Test that code embedding assignments to a Smi field gets properly
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// deoptimized if s->t field representation changes are done in-place.
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(function() {
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function O(x) { this.x = x; }
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function foo(o) { o.x = 0; }
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%PrepareFunctionForOptimization(foo);
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// We need to keep an instance around to make the GC stress testing work.
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const o1 = new O(1);
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foo(o1);
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foo(new O(2));
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%OptimizeFunctionOnNextCall(foo);
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foo(new O(3));
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assertOptimized(foo);
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new O(null);
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assertUnoptimized(foo);
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})();
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// Test that code embedding accesses to a HeapObject field gets properly
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// deoptimized if h->t field representation changes are done in-place.
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(function() {
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function O(x) { this.x = x; }
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function foo(o) { return o.x; }
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%PrepareFunctionForOptimization(foo);
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// We need to keep an instance around to make the GC stress testing work.
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const onull = new O(null);
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foo(onull);
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foo(new O("Hello"));
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%OptimizeFunctionOnNextCall(foo);
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foo(new O({}));
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assertOptimized(foo);
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new O(1);
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assertUnoptimized(foo);
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})();
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// Test that code embedding assignments to a Smi field gets properly
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// deoptimized if s->t field representation changes are done in-place.
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(function() {
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function O(x) { this.x = x; }
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function foo(o) { o.x = true; }
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%PrepareFunctionForOptimization(foo);
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// We need to keep an instance around to make the GC stress testing work.
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const onull = new O(null);
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foo(onull);
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foo(new O("Hello"));
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%OptimizeFunctionOnNextCall(foo);
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foo(new O({}));
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assertOptimized(foo);
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new O(1);
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assertUnoptimized(foo);
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})();
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