Use a dictionary-mode code cache on the map rather than a dual system.

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 4032 matching lines @@
   // Is it a fixed array?
   __ bind(&try_array);
   __ lw(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset));
   __ LoadRoot(at, Heap::kFixedArrayMapRootIndex);
   __ Branch(&not_array, ne, at, Operand(scratch1));
   HandleArrayCases(masm, feedback, receiver_map, scratch1, t5, true, &miss);
 
   __ bind(&not_array);
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ Branch(&miss, ne, at, Operand(feedback));
-  Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::LOAD_IC));
+  Code::Flags code_flags =
+      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC));
   masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags,
                                                receiver, name, feedback,
                                                receiver_map, scratch1, t5);
 
   __ bind(&miss);
   LoadIC::GenerateMiss(masm);
 
   __ bind(&load_smi_map);
   __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex);
   __ jmp(&compare_map);
@@ skipping 120 matching lines @@
   __ LoadRoot(at, Heap::kFixedArrayMapRootIndex);
   __ Branch(&not_array, ne, scratch1, Operand(at));
 
   Register scratch2 = t4;
   HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, true,
                    &miss);
 
   __ bind(&not_array);
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ Branch(&miss, ne, feedback, Operand(at));
-  Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::STORE_IC));
+  Code::Flags code_flags =
+      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, Code::STORE_IC, code_flags, receiver, key, feedback, receiver_map,
       scratch1, scratch2);
 
   __ bind(&miss);
   StoreIC::GenerateMiss(masm);
 
   __ bind(&load_smi_map);
   __ Branch(USE_DELAY_SLOT, &compare_map);
   __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex);  // In delay slot.
@@ skipping 1520 matching lines @@
                            return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS