ARM: Don't emit a write barrier for an inlined keyed load...

src/arm/codegen-arm.h

 // Copyright 2010 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 26 matching lines @@
 // Forward declarations
 class CompilationInfo;
 class DeferredCode;
 class JumpTarget;
 class RegisterAllocator;
 class RegisterFile;
 
 enum InitState { CONST_INIT, NOT_CONST_INIT };
 enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 enum GenerateInlineSmi { DONT_GENERATE_INLINE_SMI, GENERATE_INLINE_SMI };
+enum WriteBarrierCharacter { UNLIKELY_SMI, LIKELY_SMI, NEVER_NEWSPACE };
 
 
 // -------------------------------------------------------------------------
 // Reference support
 
 // A reference is a C++ stack-allocated object that puts a
 // reference on the virtual frame.  The reference may be consumed
 // by GetValue, TakeValue, SetValue, and Codegen::UnloadReference.
 // When the lifetime (scope) of a valid reference ends, it must have
 // been consumed, and be in state UNLOADED.
@@ skipping 36 matching lines @@
   // the expression stack, and it is consumed by the call unless the
   // reference is for a compound assignment.
   // If the reference is not consumed, it is left in place under its value.
   void GetValue();
 
   // Generate code to store the value on top of the expression stack in the
   // reference.  The reference is expected to be immediately below the value
   // on the expression stack.  The  value is stored in the location specified
   // by the reference, and is left on top of the stack, after the reference
   // is popped from beneath it (unloaded).
-  void SetValue(InitState init_state);
+  void SetValue(InitState init_state, WriteBarrierCharacter wb);
 
   // This is in preparation for something that uses the reference on the stack.
   // If we need this reference afterwards get then dup it now.  Otherwise mark
   // it as used.
   inline void DupIfPersist();
 
  private:
   CodeGenerator* cgen_;
   Expression* expression_;
   Type type_;
@@ skipping 263 matching lines @@
   // the frame and consumed. Otherwise, receiver and value are passed on the
   // frame and consumed. The result is returned in r0.
   void EmitNamedStore(Handle<String> name, bool is_contextual);
 
   // Load a keyed property, leaving it in r0.  The receiver and key are
   // passed on the stack, and remain there.
   void EmitKeyedLoad();
 
   // Store a keyed property. Key and receiver are on the stack and the value is
   // in r0. Result is returned in r0.
-  void EmitKeyedStore(StaticType* key_type);
+  void EmitKeyedStore(StaticType* key_type, WriteBarrierCharacter wb_info);
 
   void LoadFromGlobalSlotCheckExtensions(Slot* slot,
                                          TypeofState typeof_state,
                                          JumpTarget* slow);
 
   // Support for loading from local/global variables and arguments
   // whose location is known unless they are shadowed by
   // eval-introduced bindings. Generates no code for unsupported slot
   // types and therefore expects to fall through to the slow jump target.
   void EmitDynamicLoadFromSlotFastCase(Slot* slot,
@@ skipping 686 matching lines @@
     return ObjectBits::encode(object_.code()) |
            OffsetBits::encode(offset_.code()) |
            ScratchBits::encode(scratch_.code());
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_