Refactor elements kind conversion.

src/x64/ic-x64.cc

 // Copyright 2011 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 1589 matching lines @@
   __ TailCallExternalReference(ref, 3, 1);
 }
 
 
 void KeyedStoreIC::GenerateTransitionElementsSmiToDouble(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rdx     : receiver
   //  -- rsp[0]  : return address
   // -----------------------------------
   // Must return the modified receiver in eax.
+  if (!FLAG_trace_elements_transitions) {
+    Label fail;
+    ElementsTransitionGenerator::GenerateSmiOnlyToDouble(masm, &fail);
+    __ movq(rax, rdx);
+    __ Ret();
+    __ bind(&fail);
+  }
 
   __ pop(rbx);
   __ push(rdx);
   __ push(rbx);  // return address
-
   __ TailCallRuntime(Runtime::kTransitionElementsSmiToDouble, 1, 1);
 }
 
 
 void KeyedStoreIC::GenerateTransitionElementsDoubleToObject(
     MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rdx     : receiver
   //  -- rsp[0]  : return address
   // -----------------------------------
   // Must return the modified receiver in eax.
+  if (!FLAG_trace_elements_transitions) {
+    Label fail;
+    ElementsTransitionGenerator::GenerateDoubleToObject(masm, &fail);
+    __ movq(rax, rdx);
+    __ Ret();
+    __ bind(&fail);
+  }
 
   __ pop(rbx);
   __ push(rdx);
   __ push(rbx);  // return address
-
   __ TailCallRuntime(Runtime::kTransitionElementsDoubleToObject, 1, 1);
 }
 
 
 #undef __
 
 
 Condition CompareIC::ComputeCondition(Token::Value op) {
   switch (op) {
     case Token::EQ_STRICT:
@@ skipping 84 matching lines @@
   Condition cc = *jmp_address == Assembler::kJncShortOpcode
       ? not_zero
       : zero;
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64