Implement tracking and optimizations of packed arrays

src/mips/builtins-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 434 matching lines @@
   __ CheckMap(
       a2, t5, Heap::kHeapNumberMapRootIndex, &not_double, DONT_DO_SMI_CHECK);
   __ bind(&cant_transition_map);
   __ UndoAllocationInNewSpace(a3, t0);
   __ Branch(call_generic_code);
 
   __ bind(&not_double);
   // Transition FAST_SMI_ONLY_ELEMENTS to FAST_ELEMENTS.
   // a3: JSArray
   __ lw(a2, FieldMemOperand(a3, HeapObject::kMapOffset));
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ONLY_ELEMENTS,
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
                                          FAST_ELEMENTS,
                                          a2,
                                          t5,
                                          &cant_transition_map);
   __ sw(a2, FieldMemOperand(a3, HeapObject::kMapOffset));
   __ RecordWriteField(a3,
                       HeapObject::kMapOffset,
                       a2,
                       t5,
                       kRAHasNotBeenSaved,
@@ skipping 1330 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ Jump(a3);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS