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Issue 10690178: MIPS: Ensure that all descriptors have a valid enumeration index, and replace NextEnumIndex with La… (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 5 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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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5332 5332
5333 CheckMap(a3, 5333 CheckMap(a3,
5334 t3, 5334 t3,
5335 isolate()->factory()->fixed_array_map(), 5335 isolate()->factory()->fixed_array_map(),
5336 call_runtime, 5336 call_runtime,
5337 DONT_DO_SMI_CHECK); 5337 DONT_DO_SMI_CHECK);
5338 5338
5339 // Check that there is an enum cache in the non-empty instance 5339 // Check that there is an enum cache in the non-empty instance
5340 // descriptors (a3). This is the case if the next enumeration 5340 // descriptors (a3). This is the case if the next enumeration
5341 // index field does not contain a smi. 5341 // index field does not contain a smi.
5342 lw(a3, FieldMemOperand(a3, DescriptorArray::kEnumerationIndexOffset)); 5342 lw(a3, FieldMemOperand(a3, DescriptorArray::kLastAddedOffset));
5343 JumpIfSmi(a3, call_runtime); 5343 JumpIfSmi(a3, call_runtime);
5344 5344
5345 // For all objects but the receiver, check that the cache is empty. 5345 // For all objects but the receiver, check that the cache is empty.
5346 Label check_prototype; 5346 Label check_prototype;
5347 Branch(&check_prototype, eq, a1, Operand(a0)); 5347 Branch(&check_prototype, eq, a1, Operand(a0));
5348 lw(a3, FieldMemOperand(a3, DescriptorArray::kEnumCacheBridgeCacheOffset)); 5348 lw(a3, FieldMemOperand(a3, DescriptorArray::kEnumCacheBridgeCacheOffset));
5349 Branch(call_runtime, ne, a3, Operand(empty_fixed_array_value)); 5349 Branch(call_runtime, ne, a3, Operand(empty_fixed_array_value));
5350 5350
5351 // Load the prototype from the map and loop if non-null. 5351 // Load the prototype from the map and loop if non-null.
5352 bind(&check_prototype); 5352 bind(&check_prototype);
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5459 opcode == BGTZL); 5459 opcode == BGTZL);
5460 opcode = (cond == eq) ? BEQ : BNE; 5460 opcode = (cond == eq) ? BEQ : BNE;
5461 instr = (instr & ~kOpcodeMask) | opcode; 5461 instr = (instr & ~kOpcodeMask) | opcode;
5462 masm_.emit(instr); 5462 masm_.emit(instr);
5463 } 5463 }
5464 5464
5465 5465
5466 } } // namespace v8::internal 5466 } } // namespace v8::internal
5467 5467
5468 #endif // V8_TARGET_ARCH_MIPS 5468 #endif // V8_TARGET_ARCH_MIPS
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