Hydrogen code stubs for vector-based ICs.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 30b994ee77debed5f97759f7217d270107a83d9b..8163841551d9a6ff33fbce1c24fa946ba96f3a1f 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -491,19 +491,23 @@ class LCallStub FINAL : public LTemplateInstruction<1, 1, 0> {
 
 
 class LTailCallThroughMegamorphicCache FINAL
-    : public LTemplateInstruction<0, 3, 0> {
+    : public LTemplateInstruction<0, 5, 0> {
  public:
   explicit LTailCallThroughMegamorphicCache(LOperand* context,
-                                            LOperand* receiver,
-                                            LOperand* name) {
+                                            LOperand* receiver, LOperand* name,
+                                            LOperand* slot, LOperand* vector) {
     inputs_[0] = context;
     inputs_[1] = receiver;
     inputs_[2] = name;
+    inputs_[3] = slot;
+    inputs_[4] = vector;
   }
 
   LOperand* context() { return inputs_[0]; }
   LOperand* receiver() { return inputs_[1]; }
   LOperand* name() { return inputs_[2]; }
+  LOperand* slot() { return inputs_[3]; }
+  LOperand* vector() { return inputs_[4]; }
 
   DECLARE_CONCRETE_INSTRUCTION(TailCallThroughMegamorphicCache,
                                "tail-call-through-megamorphic-cache")