978ad03b92
Fix and re-enable the flexible representation for Math.floor (which is used to implement Math.ceil) and Math.round, which allows Math.floor and Math.round to return double results instead of int32, and therefore allows values outside the int32 range, especially -0 is now a valid result, which doesn't deopt. Also port this feature to x64 and ia32 when the CPU supports the SSE4.1 extension. This addresses all the known deoptimization loops related to Math.round in the Kraken benchmark suite, and seems to also address most of the deoptimization loops related to Math.floor in the Oort Online benchmark. Drive-by-fix: Import the regression tests for the broken HMathFloorOfDiv optimization that caused the initial revert of the feature (for arm64 only back then). BUG=chromium:476477,v8:2890,v8:4059 R=jarin@chromium.org LOG=n Review URL: https://codereview.chromium.org/1841513003 Cr-Commit-Position: refs/heads/master@{#35094}
22 lines
476 B
JavaScript
22 lines
476 B
JavaScript
// Copyright 2016 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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var obj = {
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_leftTime: 12345678,
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_divider: function() {
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var s = Math.floor(this._leftTime / 3600);
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var e = Math.floor(s / 24);
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var i = s % 24;
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return {
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s: s,
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e: e,
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i: i,
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}
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}
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}
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for (var i = 0; i < 1000; i++) {
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obj._divider();
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}
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