Introduce HTransitionElementsKind instruction.

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 1584 matching lines @@
 
   // Do tail-call to runtime routine.
   ExternalReference ref = force_generic
     ? ExternalReference(IC_Utility(kKeyedStoreIC_MissForceGeneric),
                         masm->isolate())
     : ExternalReference(IC_Utility(kKeyedStoreIC_Miss), masm->isolate());
   __ 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.
+
+  __ 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.
+
+  __ 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:
     case Token::EQ:
       return equal;
     case Token::LT:
       return less;
@@ skipping 82 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