ARM improvements to constant div, mod and mul....

src/arm/codegen-arm.h

 // Copyright 2006-2008 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 168 matching lines @@
   RegisterAllocator* allocator() const { return allocator_; }
 
   CodeGenState* state() { return state_; }
   void set_state(CodeGenState* state) { state_ = state; }
 
   void AddDeferred(DeferredCode* code) { deferred_.Add(code); }
 
   bool in_spilled_code() const { return in_spilled_code_; }
   void set_in_spilled_code(bool flag) { in_spilled_code_ = flag; }
 
+  static const int kUnknownIntValue = -1;
+
  private:
   // Construction/Destruction
   CodeGenerator(int buffer_size, Handle<Script> script, bool is_eval);
   virtual ~CodeGenerator() { delete masm_; }
 
   // Accessors
   Scope* scope() const { return scope_; }
 
   // Generating deferred code.
   void ProcessDeferred();
@@ skipping 85 matching lines @@
   // 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);
 
-  void GenericBinaryOperation(Token::Value op, OverwriteMode overwrite_mode);
+  void GenericBinaryOperation(Token::Value op,
+                              OverwriteMode overwrite_mode,
+                              int known_rhs = kUnknownIntValue);
   void Comparison(Condition cc,
                   Expression* left,
                   Expression* right,
                   bool strict = false);
 
   void SmiOperation(Token::Value op,
                     Handle<Object> value,
                     bool reversed,
                     OverwriteMode mode);
 
@@ skipping 108 matching lines @@
   friend class JumpTarget;
   friend class Reference;
 
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_