Adds the possibility of setting a Code object as the callback of a FunctionTemplate.

src/ic/x64/handler-compiler-x64.cc

Index: src/ic/x64/handler-compiler-x64.cc
diff --git a/src/ic/x64/handler-compiler-x64.cc b/src/ic/x64/handler-compiler-x64.cc
index 6bc3aafa89fe8353fd0ff6304b7f8ac3036021e1..77a09753d62fa3ca0129bb1d8b944ecd512ee1bd 100644
--- a/src/ic/x64/handler-compiler-x64.cc
+++ b/src/ic/x64/handler-compiler-x64.cc
@@ -188,6 +188,14 @@ void PropertyHandlerCompiler::GenerateApiAccessorCall(
     __ movp(data, FieldOperand(data, CallHandlerInfo::kDataOffset));
   }
 
+  if (api_call_info->callback()->IsCode()) {
+    // Just tail call into the code.
+    __ Move(rdx, handle(Code::cast(api_call_info->callback())));

[Benedikt Meurer, 2015/11/12 04:31:21]

You should be able to use __ Jump(code, RelocInfo::CODE_TARGET) instead.

[epertoso, 2015/11/13 01:39:28]

Done.

+    __ addp(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag));
+    __ jmp(rdx);
+    return;
+  }
+
   // Put api_function_address in place.
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
   __ Move(api_function_address, function_address,