load ics for js api accessors

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 55e4a9b129556c070cfc8a3e39b1d9f6bc777864..1a4d889c6c9f26c8089701a2930a27e387670ecf 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -1191,7 +1191,7 @@ Register BaseLoadStubCompiler::CallbackHandlerFrontend(
     Handle<JSObject> holder,
     Handle<Name> name,
     Label* success,
-    Handle<ExecutableAccessorInfo> callback) {
+    Handle<Object> callback) {
   Label miss;
 
   Register reg = HandlerFrontendHeader(object, object_reg, holder, name, &miss);
@@ -1277,6 +1277,35 @@ void BaseLoadStubCompiler::GenerateLoadField(Register reg,
 
 void BaseLoadStubCompiler::GenerateLoadCallback(
     Register reg,
+    const CallOptimization& call_optimization) {
+  ASSERT(call_optimization.is_simple_api_call());
+  ASSERT(!scratch3().is(reg));
+  ASSERT(!receiver().is(reg));
+
+  // copy return value
+  __ movq(scratch3(), StackSpaceOperand(0));
+  // assign stack space for the call arguments
+  __ subq(rsp, Immediate((kFastApiCallArguments + 1) * kPointerSize));
+  // Move the return address on top of the stack.
+  __ movq(StackOperandForReturnAddress(0), scratch3());
+
+  int argc = 0;
+  int api_call_argc = argc + kFastApiCallArguments;
+  StackArgumentsAccessor args(rsp, api_call_argc);
+  // write holder to stack frame
+  Register holder =
+      call_optimization.expected_receiver_type().is_null() ?
+          receiver() : reg;
+  __ movq(args.GetArgumentOperand(api_call_argc), holder);
+  // write receiver to stack frame
+  __ movq(args.GetArgumentOperand(api_call_argc - (argc + 6)), receiver());
+
+  GenerateFastApiCall(masm(), call_optimization, argc);
+}
+
+
+void BaseLoadStubCompiler::GenerateLoadCallback(
+    Register reg,
     Handle<ExecutableAccessorInfo> callback) {
   // Insert additional parameters into the stack frame above return address.
   ASSERT(!scratch4().is(reg));