Implement tracking and optimizations of packed arrays

src/x64/ic-x64.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 751 matching lines @@
   __ ret(0);
 
   __ bind(&transition_smi_elements);
   __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
 
   // Transition the array appropriately depending on the value type.
   __ movq(r9, FieldOperand(rax, HeapObject::kMapOffset));
   __ CompareRoot(r9, Heap::kHeapNumberMapRootIndex);
   __ j(not_equal, &non_double_value);
 
-  // Value is a double. Transition FAST_SMI_ONLY_ELEMENTS ->
+  // Value is a double. Transition FAST_SMI_ELEMENTS ->
   // FAST_DOUBLE_ELEMENTS and complete the store.
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ONLY_ELEMENTS,
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
                                          FAST_DOUBLE_ELEMENTS,
                                          rbx,
                                          rdi,
                                          &slow);
-  ElementsTransitionGenerator::GenerateSmiOnlyToDouble(masm, &slow);
+  ElementsTransitionGenerator::GenerateSmiToDouble(masm, &slow);
   __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
   __ jmp(&fast_double_without_map_check);
 
   __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ONLY_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ONLY_ELEMENTS,
+  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
                                          FAST_ELEMENTS,
                                          rbx,
                                          rdi,
                                          &slow);
-  ElementsTransitionGenerator::GenerateSmiOnlyToObject(masm);
+  ElementsTransitionGenerator::GenerateMapChangeElementTransition(masm);
   __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
   __ jmp(&finish_object_store);
 
   __ bind(&transition_double_elements);
   // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
   // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
   // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
   __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
   __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
                                          FAST_ELEMENTS,
@@ skipping 834 matching lines @@
 
 void KeyedStoreIC::GenerateTransitionElementsSmiToDouble(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rbx     : target map
   //  -- rdx     : receiver
   //  -- rsp[0]  : return address
   // -----------------------------------
   // Must return the modified receiver in eax.
   if (!FLAG_trace_elements_transitions) {
     Label fail;
-    ElementsTransitionGenerator::GenerateSmiOnlyToDouble(masm, &fail);
+    ElementsTransitionGenerator::GenerateSmiToDouble(masm, &fail);
     __ movq(rax, rdx);
     __ Ret();
     __ bind(&fail);
   }
 
   __ pop(rbx);
   __ push(rdx);
   __ push(rbx);  // return address
   __ TailCallRuntime(Runtime::kTransitionElementsSmiToDouble, 1, 1);
 }
@@ skipping 122 matching lines @@
   Condition cc = (check == ENABLE_INLINED_SMI_CHECK)
       ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
       : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64