Don't explicitly pass requested representations to constants; implement ConstantS

src/hydrogen-instructions.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 3106 matching lines @@
 
  private:
   virtual bool IsDeletable() const { return true; }
 };
 
 
 class HConstant: public HTemplateInstruction<0> {
  public:
   HConstant(Handle<Object> handle, Representation r);
   HConstant(int32_t value,
-            Representation r,
+            Representation r = Representation::None(),
             bool is_not_in_new_space = true,
             Handle<Object> optional_handle = Handle<Object>::null());
   HConstant(double value,
-            Representation r,
+            Representation r = Representation::None(),
             bool is_not_in_new_space = true,
             Handle<Object> optional_handle = Handle<Object>::null());
   HConstant(Handle<Object> handle,
             UniqueValueId unique_id,
             Representation r,
             HType type,
             bool is_internalized_string,
             bool is_not_in_new_space,
             bool boolean_value);
 
@@ skipping 378 matching lines @@
   HValue* arguments() { return OperandAt(0); }
   HValue* length() { return OperandAt(1); }
   HValue* index() { return OperandAt(2); }
 
   DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt)
 
   virtual bool DataEquals(HValue* other) { return true; }
 };
 
 
-enum BoundsCheckKeyMode {
-  DONT_ALLOW_SMI_KEY,
-  ALLOW_SMI_KEY
-};
-
-
 class HBoundsCheckBaseIndexInformation;
 
 
 class HBoundsCheck: public HTemplateInstruction<2> {
  public:
   // Normally HBoundsCheck should be created using the
   // HGraphBuilder::AddBoundsCheck() helper.
   // However when building stubs, where we know that the arguments are Int32,
   // it makes sense to invoke this constructor directly.
-  HBoundsCheck(HValue* index,
-               HValue* length,
-               BoundsCheckKeyMode key_mode = DONT_ALLOW_SMI_KEY)
-    : key_mode_(key_mode), skip_check_(false),
+  HBoundsCheck(HValue* index, HValue* length)
+    : skip_check_(false),
       base_(NULL), offset_(0), scale_(0),
       responsibility_direction_(DIRECTION_NONE) {
     SetOperandAt(0, index);
     SetOperandAt(1, length);
     SetFlag(kFlexibleRepresentation);
     SetFlag(kUseGVN);
   }
 
   bool skip_check() { return skip_check_; }
   void set_skip_check(bool skip_check) { skip_check_ = skip_check; }
@@ skipping 52 matching lines @@
  protected:
   friend class HBoundsCheckBaseIndexInformation;
 
   virtual void SetResponsibilityForRange(RangeGuaranteeDirection direction) {
     responsibility_direction_ = static_cast<RangeGuaranteeDirection>(
         responsibility_direction_ | direction);
   }
 
   virtual bool DataEquals(HValue* other) { return true; }
   virtual void TryGuaranteeRangeChanging(RangeEvaluationContext* context);
-  BoundsCheckKeyMode key_mode_;
   bool skip_check_;
   HValue* base_;
   int offset_;
   int scale_;
   RangeGuaranteeDirection responsibility_direction_;
 };
 
 
 class HBoundsCheckBaseIndexInformation: public HTemplateInstruction<2> {
  public:
@@ skipping 2867 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_