Hydrogen: Re-use regular comparisons infrastructure for switch statements

src/hydrogen.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 2305 matching lines @@
   bool TryCallPolymorphicAsMonomorphic(Call* expr,
                                        HValue* receiver,
                                        SmallMapList* types,
                                        Handle<String> name);
   void HandleLiteralCompareTypeof(CompareOperation* expr,
                                   Expression* sub_expr,
                                   Handle<String> check);
   void HandleLiteralCompareNil(CompareOperation* expr,
                                Expression* sub_expr,
                                NilValue nil);
+  HControlInstruction* BuildCompareInstruction(Token::Value op,
+                                               HValue* left,
+                                               HValue* right,
+                                               Handle<Type> left_type,
+                                               Handle<Type> right_type,
+                                               Handle<Type> combined_type,
+                                               int left_position,
+                                               int right_position,
+                                               BailoutId bailout_id);
 
   HInstruction* BuildStringCharCodeAt(HValue* string,
                                       HValue* index);
   HValue* BuildBinaryOperation(BinaryOperation* expr,
                                HValue* left,
                                HValue* right);
   HInstruction* BuildIncrement(bool returns_original_input,
                                CountOperation* expr);
   HInstruction* BuildLoadKeyedGeneric(HValue* object,
                                       HValue* key);
@@ skipping 294 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_