MIPS: port Add complete ElementsKind information directly to Map for objects with elements.

src/mips/ic-mips.cc

 // Copyright 2011 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 932 matching lines @@
 
   // Check that the key is a smi.
   __ JumpIfNotSmi(key, &check_string);
   __ bind(&index_smi);
   // Now the key is known to be a smi. This place is also jumped to from below
   // where a numeric string is converted to a smi.
 
   GenerateKeyedLoadReceiverCheck(
       masm, receiver, a2, a3, Map::kHasIndexedInterceptor, &slow);
 
-  // Check the "has fast elements" bit in the receiver's map which is
-  // now in a2.
-  __ lbu(a3, FieldMemOperand(a2, Map::kBitField2Offset));
-  __ And(at, a3, Operand(1 << Map::kHasFastElements));
-  __ Branch(&check_number_dictionary, eq, at, Operand(zero_reg));
+  // Check the receiver's map to see if it has fast elements.
+  __ CheckFastElements(a2, a3, &check_number_dictionary);
 
   GenerateFastArrayLoad(
       masm, receiver, key, t0, a3, a2, v0, NULL, &slow);
 
   __ IncrementCounter(isolate->counters()->keyed_load_generic_smi(), 1, a2, a3);
   __ Ret();
 
   __ bind(&check_number_dictionary);
   __ lw(t0, FieldMemOperand(receiver, JSObject::kElementsOffset));
   __ lw(a3, FieldMemOperand(t0, JSObject::kMapOffset));
@@ skipping 604 matching lines @@
     Register reg = Register::from_code(Assembler::GetRs(instr_at_patch));
     patcher.masm()->andi(at, reg, kSmiTagMask);
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS