Refactor the fast-case code for loading local/global variables and...

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 296 matching lines @@
   // cannot reach the end of the expression (ie, by emitting only
   // unconditional jumps to the control targets).
   inline void LoadConditionAndSpill(Expression* expression,
                                     JumpTarget* true_target,
                                     JumpTarget* false_target,
                                     bool force_control);
 
   // Read a value from a slot and leave it on top of the expression stack.
   void LoadFromSlot(Slot* slot, TypeofState typeof_state);
   void LoadFromSlotCheckForArguments(Slot* slot, TypeofState state);
+
   // Store the value on top of the stack to a slot.
   void StoreToSlot(Slot* slot, InitState init_state);
 
   // Support for compiling assignment expressions.
   void EmitSlotAssignment(Assignment* node);
   void EmitNamedPropertyAssignment(Assignment* node);
   void EmitKeyedPropertyAssignment(Assignment* node);
 
   // Load a named property, returning it in r0. The receiver is passed on the
   // stack, and remains there.
   void EmitNamedLoad(Handle<String> name, bool is_contextual);
 
   // Store to a named property. If the store is contextual, value is passed on
   // 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 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,
+                                       TypeofState typeof_state,
+                                       JumpTarget* slow,
+                                       JumpTarget* done);
+
   // Special code for typeof expressions: Unfortunately, we must
   // be careful when loading the expression in 'typeof'
   // expressions. We are not allowed to throw reference errors for
   // non-existing properties of the global object, so we must make it
   // look like an explicit property access, instead of an access
   // through the context chain.
   void LoadTypeofExpression(Expression* x);
 
   void ToBoolean(JumpTarget* true_target, JumpTarget* false_target);
 
@@ skipping 586 matching lines @@
     return ObjectBits::encode(object_.code()) |
            OffsetBits::encode(offset_.code()) |
            ScratchBits::encode(scratch_.code());
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_