Fix issue 974.

src/full-codegen.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 268 matching lines @@
     kLeftConstant,
     kRightConstant
   };
 
   // Type of a member function that generates inline code for a native function.
   typedef void (FullCodeGenerator::*InlineFunctionGenerator)
       (ZoneList<Expression*>*);
 
   static const InlineFunctionGenerator kInlineFunctionGenerators[];
 
+  // A platform-specific utility to overwrite the accumulator register
+  // with a GC-safe value.
+  void ClearAccumulator();
+
   // Compute the frame pointer relative offset for a given local or
   // parameter slot.
   int SlotOffset(Slot* slot);
 
   // Determine whether or not to inline the smi case for the given
   // operation.
   bool ShouldInlineSmiCase(Token::Value op);
 
   // Compute which (if any) of the operands is a compile-time constant.
   ConstantOperand GetConstantOperand(Token::Value op,
@@ skipping 464 matching lines @@
 
   friend class NestedStatement;
 
   DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_