1 // Copyright 2016 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Flags: --expose-gc --min-semi-space-size=32 6 7 // We need to set --min-semi-space-size to enable allocation site pretenuring. 8 9 function foo(i) { 10 with({}) {}; 11 x = {}; 12 x.a = 0.23; 13 x.b = 0.3; 14 return x; 15 } 16 17 var all = []; 18 function step() { 19 for (var i = 0; i < 100; i++) { 20 var z = foo(i); 21 // Write unboxed double in object slack. 22 z.c = 0.1 + z.b 23 all.push(z); 24 } 25 gc(1); 26 gc(1); 27 } 28 29 step(); 30 // Now foo will allocate objects in old space. 31 step(); 32
