[Interpreter] Add support for property load operations.

src/compiler/interpreter-assembler.cc

Index: src/compiler/interpreter-assembler.cc
diff --git a/src/compiler/interpreter-assembler.cc b/src/compiler/interpreter-assembler.cc
index 6203245fb50b3f1e8f38b799cc27a796f57ce158..d8266974a28220eddcf6da997716068286bcb4b5 100644
--- a/src/compiler/interpreter-assembler.cc
+++ b/src/compiler/interpreter-assembler.cc
@@ -14,6 +14,7 @@
 #include "src/compiler/raw-machine-assembler.h"
 #include "src/compiler/schedule.h"
 #include "src/frames.h"
+#include "src/interface-descriptors.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/macro-assembler.h"
 #include "src/zone.h"
@@ -223,6 +224,35 @@ Node* InterpreterAssembler::LoadContextSlot(int slot_index) {
 }
 
 
+Node* InterpreterAssembler::LoadTypeFeedbackVector() {
+  Node* function = raw_assembler_->Load(
+      kMachAnyTagged, RegisterFileRawPointer(),
+      IntPtrConstant(InterpreterFrameConstants::kFunctionFromRegisterPointer));
+  Node* shared_info =
+      LoadObjectField(function, JSFunction::kSharedFunctionInfoOffset);
+  Node* vector =
+      LoadObjectField(shared_info, SharedFunctionInfo::kFeedbackVectorOffset);
+  return vector;
+}
+
+
+Node* InterpreterAssembler::CallIC(CallInterfaceDescriptor descriptor,

[mvstanton, 2015/09/01 14:28:29]

If the number of arguments are going to be fixed I'd like to see something in
the name calling it a LoadIC, since StoreIC and other types of ICs may have
different numbers of arguments.

Maybe an ic_kind (Code::LOAD_IC, etc.) parameter could be passed?

[rmcilroy, 2015/09/01 15:53:36]

My plan was to have overloads for the number of parameters once we need other
CallICs with a different number of arguments (similar to CallJSBuiltin below). I
didn't want to make these specific to a particular IC type, this is really just
meant to be a low-level operator which calls the given descriptor with the given
arguments. WDYT?

[mvstanton, 2015/09/01 16:54:13]

Okay I can live with that :).

+                                   Node* target, Node* arg1, Node* arg2,
+                                   Node* arg3, Node* arg4) {
+  CallDescriptor* call_descriptor = Linkage::GetStubCallDescriptor(
+      isolate(), zone(), descriptor, 0, CallDescriptor::kNoFlags);
+
+  Node** args = zone()->NewArray<Node*>(5);
+  args[0] = arg1;
+  args[1] = arg2;
+  args[2] = arg3;
+  args[3] = arg4;
+  args[4] = ContextTaggedPointer();
+
+  return raw_assembler_->CallN(call_descriptor, target, args);
+}
+
+
 Node* InterpreterAssembler::CallJSBuiltin(int context_index, Node* receiver,
                                           Node** js_args, int js_arg_count) {
   Node* global_object = LoadContextSlot(Context::GLOBAL_OBJECT_INDEX);