[Interpreter] Collect type feedback for subtract operation and pass it to turbofan.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 17b193e748e0fbd92537980d8a0305fe46b090e7..bff08a21608683b7b10e9071f1eb4138716b4394 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -14,6 +14,7 @@
 #include "src/interface-descriptors.h"
 #include "src/macro-assembler.h"
 #include "src/ostreams.h"
+#include "src/utils.h"
 
 namespace v8 {
 namespace internal {
@@ -432,6 +433,22 @@ class CodeStub BASE_EMBEDDED {
   }                                                                            \
   DEFINE_CODE_STUB(NAME, SUPER)
 
+// TODO(mythria): check where generate assembly is used and if have to pass 6
+// parameters.
+#define DEFINE_TURBOFAN_BINARY_OP_CODE_STUB_WITH_FEEDBACK(NAME, SUPER)         \
+ public:                                                                       \
+  static compiler::Node* Generate(CodeStubAssembler* assembler,                \
+                                  compiler::Node* left, compiler::Node* right, \
+                                  compiler::Node* context,                     \
+                                  compiler::Node* type_feedback_vector = NULL, \
+                                  compiler::Node* slot_id = NULL);             \
+  void GenerateAssembly(CodeStubAssembler* assembler) const override {         \

[mythria, 2016/08/08 04:33:56]

I am not sure where GenerateAssembly is used. I did not add two additional
parameters because we collect type feedback only from ignition and others don't
require to collect type feedback. 

+    assembler->Return(Generate(assembler, assembler->Parameter(0),             \
+                               assembler->Parameter(1),                        \
+                               assembler->Parameter(2)));                      \
+  }                                                                            \
+  DEFINE_CODE_STUB(NAME, SUPER)
+
 #define DEFINE_TURBOFAN_UNARY_OP_CODE_STUB(NAME, SUPER)                \
  public:                                                               \
   static compiler::Node* Generate(CodeStubAssembler* assembler,        \
@@ -746,7 +763,7 @@ class SubtractStub final : public TurboFanCodeStub {
   explicit SubtractStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(BinaryOp);
-  DEFINE_TURBOFAN_BINARY_OP_CODE_STUB(Subtract, TurboFanCodeStub);
+  DEFINE_TURBOFAN_BINARY_OP_CODE_STUB_WITH_FEEDBACK(Subtract, TurboFanCodeStub);

[mythria, 2016/08/08 04:33:56]

We can remove this once we migrate all binary ops to collect type feedback. 

 };
 
 class MultiplyStub final : public TurboFanCodeStub {