MIPS: Ensure that all descriptors have a valid enumeration index, and replace NextEnumIndex with La…

src/mips/macro-assembler-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5321 matching lines @@
 
   CheckMap(a3,
            t3,
            isolate()->factory()->fixed_array_map(),
            call_runtime,
            DONT_DO_SMI_CHECK);
 
   // Check that there is an enum cache in the non-empty instance
   // descriptors (a3).  This is the case if the next enumeration
   // index field does not contain a smi.
-  lw(a3, FieldMemOperand(a3, DescriptorArray::kEnumerationIndexOffset));
+  lw(a3, FieldMemOperand(a3, DescriptorArray::kLastAddedOffset));
   JumpIfSmi(a3, call_runtime);
 
   // For all objects but the receiver, check that the cache is empty.
   Label check_prototype;
   Branch(&check_prototype, eq, a1, Operand(a0));
   lw(a3, FieldMemOperand(a3, DescriptorArray::kEnumCacheBridgeCacheOffset));
   Branch(call_runtime, ne, a3, Operand(empty_fixed_array_value));
 
   // Load the prototype from the map and loop if non-null.
   bind(&check_prototype);
@@ skipping 106 matching lines @@
        opcode == BGTZL);
   opcode = (cond == eq) ? BEQ : BNE;
   instr = (instr & ~kOpcodeMask) | opcode;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS