Change PC for OSR entries to point to something more sensible (i.e. the first UnknownOsrValue), rem…

src/deoptimizer.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 689 matching lines @@
     COMPILED_STUB_FRAME,
     REGISTER,
     INT32_REGISTER,
     UINT32_REGISTER,
     DOUBLE_REGISTER,
     STACK_SLOT,
     INT32_STACK_SLOT,
     UINT32_STACK_SLOT,
     DOUBLE_STACK_SLOT,
     LITERAL,
-    ARGUMENTS_OBJECT,
-
-    // A prefix indicating that the next command is a duplicate of the one
-    // that follows it.
-    DUPLICATE
+    ARGUMENTS_OBJECT
   };
 
   Translation(TranslationBuffer* buffer, int frame_count, int jsframe_count,
               Zone* zone)
       : buffer_(buffer),
         index_(buffer->CurrentIndex()),
         zone_(zone) {
     buffer_->Add(BEGIN, zone);
     buffer_->Add(frame_count, zone);
     buffer_->Add(jsframe_count, zone);
@@ skipping 11 matching lines @@
   void StoreRegister(Register reg);
   void StoreInt32Register(Register reg);
   void StoreUint32Register(Register reg);
   void StoreDoubleRegister(DoubleRegister reg);
   void StoreStackSlot(int index);
   void StoreInt32StackSlot(int index);
   void StoreUint32StackSlot(int index);
   void StoreDoubleStackSlot(int index);
   void StoreLiteral(int literal_id);
   void StoreArgumentsObject(bool args_known, int args_index, int args_length);
-  void MarkDuplicate();
 
   Zone* zone() const { return zone_; }
 
   static int NumberOfOperandsFor(Opcode opcode);
 
 #if defined(OBJECT_PRINT) || defined(ENABLE_DISASSEMBLER)
   static const char* StringFor(Opcode opcode);
 #endif
 
   // A literal id which refers to the JSFunction itself.
@@ skipping 187 matching lines @@
   Object** expression_stack_;
   int source_position_;
 
   friend class Deoptimizer;
 };
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEOPTIMIZER_H_