Hydrogen code stubs for vector-based ICs.

src/ic/handler-compiler.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_IC_HANDLER_COMPILER_H_
 #define V8_IC_HANDLER_COMPILER_H_
 
 #include "src/ic/access-compiler.h"
 #include "src/ic/ic-state.h"
 
@@ skipping 12 matching lines @@
  protected:
   PropertyHandlerCompiler(Isolate* isolate, Code::Kind kind,
                           Handle<HeapType> type, Handle<JSObject> holder,
                           CacheHolderFlag cache_holder)
       : PropertyAccessCompiler(isolate, kind, cache_holder),
         type_(type),
         holder_(holder) {}
 
   virtual ~PropertyHandlerCompiler() {}
 
+  // TODO(mvstanton): the frontend header in FLAG_vector_ic case needs to
+  // save the vector and slot registers on the stack, and the footer would
+  // pop them before calling the miss helper. Also, these regs need to be popped
+  // before any returns. P'rhaps the popping can be done at the end of the
+  // footer, eh? (idea from Toon).
   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
                                   Label* miss) {
     UNREACHABLE();
     return receiver();
   }
 
   virtual void FrontendFooter(Handle<Name> name, Label* miss) { UNREACHABLE(); }
 
   Register Frontend(Register object_reg, Handle<Name> name);
   void NonexistentFrontendHeader(Handle<Name> name, Label* miss,
                                  Register scratch1, Register scratch2);
 
+  // When FLAG_vector_ics is true, handlers that have the possibility of missing
+  // will need to save and pass these to miss handlers.
+  void PushVectorAndSlot();
+  void PushVectorAndSlot(Register vector, Register slot);
+  void PopVectorAndSlot();
+  void PopVectorAndSlot(Register vector, Register slot);
+
+  void DiscardVectorAndSlot();
+
   // TODO(verwaest): Make non-static.
   static void GenerateFastApiCall(MacroAssembler* masm,
                                   const CallOptimization& optimization,
                                   Handle<Map> receiver_map, Register receiver,
                                   Register scratch, bool is_store, int argc,
                                   Register* values);
 
   // Helper function used to check that the dictionary doesn't contain
   // the property. This function may return false negatives, so miss_label
   // must always call a backup property check that is complete.
@@ skipping 210 matching lines @@
 
   void CompileElementHandlers(MapHandleList* receiver_maps,
                               CodeHandleList* handlers);
 
   static void GenerateStoreSlow(MacroAssembler* masm);
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_HANDLER_COMPILER_H_