f1d1b2f9db
Add a --deopt-to-baseline flag, on by default, which allows returning to sparkplug code when deoptimizing. However when we turn this off, no longer deoptimizing to baseline code means we can omit marking most bytecodes as valid jump targets. Leaving just OSR and exception handling entry points. This reduces the baseline code size by ~18% on Arm64. Bug: v8:13082 Change-Id: I5b5a6679465807d7fe812cb977464167efffa7ab Cq-Include-Trybots: luci.v8.try:v8_linux_arm64_cfi_rel_ng Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785006 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Commit-Queue: Pierre Langlois <pierre.langlois@arm.com> Cr-Commit-Position: refs/heads/main@{#82266}
33 lines
744 B
JavaScript
33 lines
744 B
JavaScript
// Copyright 2022 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 --sparkplug --no-always-sparkplug --turbofan
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// Flags: --no-deopt-to-baseline
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function isExecutingInterpreted(func) {
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let opt_status = %GetOptimizationStatus(func);
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return (opt_status & V8OptimizationStatus.kTopmostFrameIsInterpreted) !== 0;
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}
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function f(check = false) {
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if (check) {
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%DeoptimizeFunction(f);
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assertTrue(isExecutingInterpreted(f));
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}
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}
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f();
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%CompileBaseline(f);
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f();
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assertTrue(isBaseline(f));
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%PrepareFunctionForOptimization(f);
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f();
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f();
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%OptimizeFunctionOnNextCall(f);
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f();
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assertOptimized(f);
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f(true);
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