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Issue 6966041: Add complete ElementKind information directly to Map for objects with elements. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: review feedback Created 9 years, 6 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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3367 Operand array_length_operand = Operand(esp, 0); 3367 Operand array_length_operand = Operand(esp, 0);
3368 __ sub(Operand(esp), Immediate(2 * kPointerSize)); 3368 __ sub(Operand(esp), Immediate(2 * kPointerSize));
3369 __ cld(); 3369 __ cld();
3370 // Check that the array is a JSArray 3370 // Check that the array is a JSArray
3371 __ test(array, Immediate(kSmiTagMask)); 3371 __ test(array, Immediate(kSmiTagMask));
3372 __ j(zero, &bailout); 3372 __ j(zero, &bailout);
3373 __ CmpObjectType(array, JS_ARRAY_TYPE, scratch); 3373 __ CmpObjectType(array, JS_ARRAY_TYPE, scratch);
3374 __ j(not_equal, &bailout); 3374 __ j(not_equal, &bailout);
3375 3375
3376 // Check that the array has fast elements. 3376 // Check that the array has fast elements.
3377 __ test_b(FieldOperand(scratch, Map::kBitField2Offset), 3377 __ CheckFastElements(scratch, &bailout);
3378 1 << Map::kHasFastElements);
3379 __ j(zero, &bailout);
3380 3378
3381 // If the array has length zero, return the empty string. 3379 // If the array has length zero, return the empty string.
3382 __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset)); 3380 __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset));
3383 __ SmiUntag(array_length); 3381 __ SmiUntag(array_length);
3384 __ j(not_zero, &non_trivial_array); 3382 __ j(not_zero, &non_trivial_array);
3385 __ mov(result_operand, isolate()->factory()->empty_string()); 3383 __ mov(result_operand, isolate()->factory()->empty_string());
3386 __ jmp(&done); 3384 __ jmp(&done);
3387 3385
3388 // Save the array length. 3386 // Save the array length.
3389 __ bind(&non_trivial_array); 3387 __ bind(&non_trivial_array);
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4332 // And return. 4330 // And return.
4333 __ ret(0); 4331 __ ret(0);
4334 } 4332 }
4335 4333
4336 4334
4337 #undef __ 4335 #undef __
4338 4336
4339 } } // namespace v8::internal 4337 } } // namespace v8::internal
4340 4338
4341 #endif // V8_TARGET_ARCH_IA32 4339 #endif // V8_TARGET_ARCH_IA32
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