Implement tracking and optimizations of packed arrays

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index 18a5f5f7e11d4f9efd696484ef9f54c96ad42a86..c9c362f7a0abd08c073245675d7efd89a980fbe4 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -1594,7 +1594,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
                                                t3,
                                                &call_builtin);
         __ mov(a2, receiver);
-        ElementsTransitionGenerator::GenerateSmiOnlyToObject(masm());
+        ElementsTransitionGenerator::GenerateMapChangeElementTransition(masm());
         __ bind(&fast_object);
       } else {
         __ CheckFastObjectElements(a3, a3, &call_builtin);
@@ -4314,7 +4314,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastElement(
 
   __ bind(&finish_store);
 
-  if (elements_kind == FAST_SMI_ONLY_ELEMENTS) {
+  if (IsFastSmiElementsKind(elements_kind)) {
     __ Addu(scratch,
             elements_reg,
             Operand(FixedArray::kHeaderSize - kHeapObjectTag));
@@ -4323,7 +4323,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastElement(
     __ Addu(scratch, scratch, scratch2);
     __ sw(value_reg, MemOperand(scratch));
   } else {
-    ASSERT(elements_kind == FAST_ELEMENTS);
+    ASSERT(IsFastObjectElementsKind(elements_kind));
     __ Addu(scratch,
             elements_reg,
             Operand(FixedArray::kHeaderSize - kHeapObjectTag));
@@ -4332,7 +4332,6 @@ void KeyedStoreStubCompiler::GenerateStoreFastElement(
     __ Addu(scratch, scratch, scratch2);
     __ sw(value_reg, MemOperand(scratch));
     __ mov(receiver_reg, value_reg);
-  ASSERT(elements_kind == FAST_ELEMENTS);
     __ RecordWrite(elements_reg,  // Object.
                    scratch,       // Address.
                    receiver_reg,  // Value.