blob: 25fa0e6d0186d5c63162b397cabc7678099f811b [file] [log] [blame]
// Copyright 2015 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 --noverify-heap --noenable-slow-asserts
// Flags: --opt --no-always-opt
// --noverify-heap and --noenable-slow-asserts are set because the test is too
// slow with it on.
// Ensure that keyed stores work, and optimized functions learn if the
// store required change to dictionary mode. Verify that stores that grow
// the array into large object space don't cause a deopt.
(function() {
var a = [];
function foo(a, i) {
a[i] = 5.3;
}
foo(a, 1);
foo(a, 2);
foo(a, 3);
%OptimizeFunctionOnNextCall(foo);
a[3] = 0;
foo(a, 3);
assertEquals(a[3], 5.3);
foo(a, 50000);
assertUnoptimized(foo);
assertTrue(%HasDictionaryElements(a));
var b = [];
foo(b, 1);
foo(b, 2);
// Put b in dictionary mode.
b[10000] = 5;
assertTrue(%HasDictionaryElements(b));
foo(b, 3);
%OptimizeFunctionOnNextCall(foo);
foo(b, 50000);
assertOptimized(foo);
assertTrue(%HasDictionaryElements(b));
// Clearing feedback for the StoreIC in foo is important for runs with
// flag --stress-opt.
%ClearFunctionFeedback(foo);
})();
(function() {
var a = new Array(10);
function foo2(a, i) {
a[i] = 50;
}
// The KeyedStoreIC will learn GROW_MODE.
foo2(a, 10);
foo2(a, 12);
foo2(a, 31);
%OptimizeFunctionOnNextCall(foo2);
foo2(a, 40);
assertOptimized(foo2);
assertTrue(%HasSmiElements(a));
// Grow a large array into large object space through the keyed store
// without deoptimizing. Grow by 9s. If we set elements too sparsely, the
// array will convert to dictionary mode.
a = new Array(99999);
assertTrue(%HasSmiElements(a));
for (var i = 0; i < 263000; i += 9) {
foo2(a, i);
}
// Verify that we are over 1 page in size, and foo2 remains optimized.
// This means we've smoothly transitioned to allocating in large object
// space.
assertTrue(%HasSmiElements(a));
assertTrue(a.length * 4 > (1024 * 1024));
assertOptimized(foo2);
%ClearFunctionFeedback(foo2);
})();