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			32 lines
		
	
	
		
			637 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			32 lines
		
	
	
		
			637 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| // Copyright 2016 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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| 
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| // Flags: --expose-gc --min-semi-space-size=32
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| 
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| // We need to set --min-semi-space-size to enable allocation site pretenuring.
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| 
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| function foo(i) {
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|   with({}) {};
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|   x = {};
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|   x.a = 0.23;
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|   x.b = 0.3;
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|   return x;
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| }
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| 
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| var all = [];
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| function step() {
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|   for (var i = 0; i < 100; i++) {
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|     var z = foo(i);
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|     // Write unboxed double in object slack.
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|     z.c = 0.1 + z.b
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|     all.push(z);
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|   }
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|   gc(1);
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|   gc(1);
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| }
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| 
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| step();
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| // Now foo will allocate objects in old space.
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| step();
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