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f226350fcb
PR-URL: https://github.com/nodejs/node/pull/47251 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Richard Lau <rlau@redhat.com>
79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
// Copyright 2021 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 --turbofan --no-always-turbofan
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// Flags: --allocation-site-pretenuring --stress-gc-during-compilation
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// Flags: --stress-scavenge=0 --gc-interval=-1
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// Flags: --max-optimized-bytecode-size=132000
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function CheckOptimizationStatus(func, expectedOptimizationStatus) {
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let opt_status = %GetOptimizationStatus(func);
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assertTrue(
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(opt_status & expectedOptimizationStatus) !== 0,
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'Expected flag 0x' + expectedOptimizationStatus.toString(16) +
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' to be set in optimization status');
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}
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// Trigger pretenuring decision change at entry, deopting at bytecode offset -1.
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let arr = [];
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var empty;
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function DeoptEntry(expectedStatus) {
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CheckOptimizationStatus(DeoptEntry, expectedStatus);
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empty = [];
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arr.push(empty);
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}
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%PrepareFunctionForOptimization(DeoptEntry);
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DeoptEntry(V8OptimizationStatus.kTopmostFrameIsInterpreted
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| V8OptimizationStatus.kTopmostFrameIsBaseline);
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%OptimizeFunctionOnNextCall(DeoptEntry);
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// Force the allocation site to be pretenured.
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assertTrue(%PretenureAllocationSite(empty));
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// This call should deopt Turbofan at entry because of the pretenuring decision
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// change. Maglev doesn't currently implement this optimization/deopt.
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DeoptEntry(
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V8OptimizationStatus.kTopmostFrameIsInterpreted |
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V8OptimizationStatus.kTopmostFrameIsBaseline |
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V8OptimizationStatus.kTopmostFrameIsMaglev);
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%PrepareFunctionForOptimization(DeoptEntry);
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%OptimizeFunctionOnNextCall(DeoptEntry);
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// Function should be compiled now.
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DeoptEntry(
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V8OptimizationStatus.kTopmostFrameIsTurboFanned |
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V8OptimizationStatus.kTopmostFrameIsMaglev);
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// Trigger pretenuring decision change during OSR.
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function createSource(name, fillCnt) {
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var src =
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`function ${name}() {
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let arr = [];
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for (var i = 0; i < 10; i++) {
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let local_arr = [];
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arr[i] = local_arr;`
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// Useless bytecodes to force a wider jump.
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for (var i = 0; i < fillCnt; i++) {
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src += ' try {} catch (e) {}\n';
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}
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src +=
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` if (i == 5) {
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%OptimizeOsr();
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%PretenureAllocationSite(local_arr);
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}
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}
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}
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%PrepareFunctionForOptimization(${name});
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${name}();`
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return src;
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}
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// Deopt at JumpLoop.
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eval(createSource('Loop',0));
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// Deopt at JumpLoop.Wide.
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eval(createSource('LoopWide',0xFF));
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// Deopt at JumpLoop.ExtraWide.
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// --max-optimized-bytecode-size has to be large enough to compile this.
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eval(createSource('LoopExtraWide',0xFFF));
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