Implement tracking and optimizations of packed arrays.

src/arm/stub-cache-arm.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 1565 matching lines @@
         __ bind(&not_fast_object);
         __ CheckFastSmiOnlyElements(r3, r7, &call_builtin);
         // edx: receiver
         // r3: map
         __ LoadTransitionedArrayMapConditional(FAST_SMI_ONLY_ELEMENTS,
                                                FAST_ELEMENTS,
                                                r3,
                                                r7,
                                                &call_builtin);
         __ mov(r2, receiver);
-        ElementsTransitionGenerator::GenerateSmiOnlyToObject(masm());
+        ElementsTransitionGenerator::GenerateMapChangeElementTransition(masm());
         __ bind(&fast_object);
       } else {
         __ CheckFastObjectElements(r3, r3, &call_builtin);
       }
 
       // Save new length.
       __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
 
       // Store the value.
       // We may need a register containing the address end_elements below,
@@ skipping 2642 matching lines @@
   }
 
   // Make sure elements is a fast element array, not 'cow'.
   __ CheckMap(elements_reg,
               scratch,
               Heap::kFixedArrayMapRootIndex,
               &miss_force_generic,
               DONT_DO_SMI_CHECK);
 
   __ bind(&finish_store);
-  if (elements_kind == FAST_SMI_ONLY_ELEMENTS) {
+  if (IsFastSmiElementsKind(elements_kind)) {
     __ add(scratch,
            elements_reg,
            Operand(FixedArray::kHeaderSize - kHeapObjectTag));
     STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2);
     __ add(scratch,
            scratch,
            Operand(key_reg, LSL, kPointerSizeLog2 - kSmiTagSize));
     __ str(value_reg, MemOperand(scratch));
   } else {
-    ASSERT(elements_kind == FAST_ELEMENTS);
+    ASSERT(IsFastObjectElementsKind(elements_kind));
     __ add(scratch,
            elements_reg,
            Operand(FixedArray::kHeaderSize - kHeapObjectTag));
     STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2);
     __ add(scratch,
            scratch,
            Operand(key_reg, LSL, kPointerSizeLog2 - kSmiTagSize));
     __ str(value_reg, MemOperand(scratch));
     __ mov(receiver_reg, value_reg);
     __ RecordWrite(elements_reg,  // Object.
@@ skipping 224 matching lines @@
     __ Jump(ic_slow, RelocInfo::CODE_TARGET);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM