c6a16c10dd
With bytecode flushing and lazy feedback allocation, we need to call %PrepareForOptimization before we call %OptimizeFunctionOnNextCall, ideally after declaring the function. Bug: v8:8801, v8:8394, v8:9183 Change-Id: I3fb257282a30f6526a376a3afdedb44786320d34 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1648255 Commit-Queue: Mathias Bynens <mathias@chromium.org> Reviewed-by: Maya Lekova <mslekova@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Cr-Commit-Position: refs/heads/master@{#62119}
33 lines
854 B
JavaScript
33 lines
854 B
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
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// We need a SpeculativeNumberAdd with Number feedback.
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function bar(x) {
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return x + x;
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}
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bar(0.1);
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// We also need an indirection via an object field such
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// that only after escape analysis TurboFan can figure
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// out that the value `y` is actually a Number in the
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// safe integer range.
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function baz(y) {
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return {y};
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}
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baz(null);
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baz(0);
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// Now we can put all of that together to get a kRepBit
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// use of a kWord64 value (on 64-bit architectures).
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function foo(o) {
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return !baz(bar(o.x)).y;
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};
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo({x: 1}));
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assertFalse(foo({x: 1}));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo({x: 1}));
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