v8/test/mjsunit/optimized-reduce.js
Camillo Bruni e3e8ea5d65 [flags] Rename --opt to --turbofan
To be consistent with the all the other tiers and avoid confusion, we
rename --opt to ---turbofan, and --always-opt to --always-turbofan.

Change-Id: Ie23dc8282b3fb4cf2fbf73b6c3d5264de5d09718
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3610431
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80336}
2022-05-03 12:10:30 +00:00

77 lines
2.2 KiB
JavaScript

// Copyright 2018 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 --expose-gc --turbo-inline-array-builtins
// Flags: --turbofan --no-always-turbofan
// Unknown field access leads to eager-deopt unrelated to reduce, should still
// lead to correct result.
(() => {
const a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
// For this particular eager deopt point to work, we need to dodge
// TurboFan's soft-deopts through a non-inlined and non-optimized function
// call to foo().
function foo(o, deopt) { if (deopt) { o.abc = 3; }}
%NeverOptimizeFunction(foo);
function eagerDeoptInCalled(deopt) {
return a.reduce((r, v, i, o) => {
if (i === 7) {
foo(a, deopt);
}
return r + "S";
}, "H");
}
%PrepareFunctionForOptimization(eagerDeoptInCalled);
eagerDeoptInCalled();
eagerDeoptInCalled();
%OptimizeFunctionOnNextCall(eagerDeoptInCalled);
eagerDeoptInCalled();
assertEquals("HSSSSSSSSSS", eagerDeoptInCalled(true));
})();
// Make sure we gracefully handle the case of an empty array in
// optimized code.
(function() {
var nothingThere = function(only_holes) {
var a = [1,2,,3]; // holey smi array.
if (only_holes) {
a = [,,,]; // also a holey smi array.
}
return a.reduce((r,v,i,o)=>r+v);
};
%PrepareFunctionForOptimization(nothingThere);
nothingThere();
nothingThere();
%OptimizeFunctionOnNextCall(nothingThere);
assertThrows(() => nothingThere(true));
})();
// An error generated inside the callback includes reduce in it's
// stack trace.
(function() {
var re = /Array\.reduce/;
var alwaysThrows = function() {
var b = [,,,];
var result = 0;
var callback = function(r,v,i,o) {
return r + v;
};
b.reduce(callback);
}
try {
alwaysThrows();
} catch (e) {
assertTrue(re.exec(e.stack) !== null);
}
%PrepareFunctionForOptimization(alwaysThrows);
try { alwaysThrows(); } catch (e) {}
try { alwaysThrows(); } catch (e) {}
%OptimizeFunctionOnNextCall(alwaysThrows);
try {
alwaysThrows();
} catch (e) {
assertTrue(re.exec(e.stack) !== null);
}
})();