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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --turbofan --no-always-turbofan
// Flags: --allocation-site-pretenuring --stress-gc-during-compilation
// Flags: --stress-scavenge=0 --gc-interval=-1
// Flags: --max-optimized-bytecode-size=132000
function CheckOptimizationStatus(func, expectedOptimizationStatus) {
let opt_status = %GetOptimizationStatus(func);
assertTrue ((opt_status & expectedOptimizationStatus) !== 0,
"Expected flag " + expectedOptimizationStatus +
" to be set in optimization status");
}
// Trigger pretenuring decision change at entry, deopting at bytecode offset -1.
let arr = [];
var empty;
function DeoptEntry(expectedStatus) {
CheckOptimizationStatus(DeoptEntry, expectedStatus);
empty = [];
arr.push(empty);
}
%PrepareFunctionForOptimization(DeoptEntry);
DeoptEntry(V8OptimizationStatus.kTopmostFrameIsInterpreted
| V8OptimizationStatus.kTopmostFrameIsBaseline);
%OptimizeFunctionOnNextCall(DeoptEntry);
// Force the allocation site to be pretenured.
assertTrue(%PretenureAllocationSite(empty));
// This call should deopt at entry because of the pretenuring decision change.
DeoptEntry(V8OptimizationStatus.kTopmostFrameIsInterpreted
| V8OptimizationStatus.kTopmostFrameIsBaseline);
%PrepareFunctionForOptimization(DeoptEntry);
%OptimizeFunctionOnNextCall(DeoptEntry);
// Function should be compiled now.
DeoptEntry(V8OptimizationStatus.kTopmostFrameIsTurboFanned);
// Trigger pretenuring decision change during OSR.
function createSource(name, fillCnt) {
var src =
`function ${name}() {
let arr = [];
for (var i = 0; i < 10; i++) {
let local_arr = [];
arr[i] = local_arr;`
// Useless bytecodes to force a wider jump.
for (var i = 0; i < fillCnt; i++) {
src += ' try {} catch (e) {}\n';
}
src +=
` if (i == 5) {
%OptimizeOsr();
%PretenureAllocationSite(local_arr);
}
}
}
%PrepareFunctionForOptimization(${name});
${name}();`
return src;
}
// Deopt at JumpLoop.
eval(createSource('Loop',0));
// Deopt at JumpLoop.Wide.
eval(createSource('LoopWide',0xFF));
// Deopt at JumpLoop.ExtraWide.
// --max-optimized-bytecode-size has to be large enough to compile this.
eval(createSource('LoopExtraWide',0xFFF));
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