Propagate and combine constants in Hydrogen

src/hydrogen-instructions.h

 // Copyright 2011 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 2307 matching lines @@
   bool HasInteger32Value() const { return has_int32_value_; }
   int32_t Integer32Value() const {
     ASSERT(HasInteger32Value());
     return int32_value_;
   }
   bool HasDoubleValue() const { return has_double_value_; }
   double DoubleValue() const {
     ASSERT(HasDoubleValue());
     return double_value_;
   }
+  bool HasNumberValue() const { return has_int32_value_ || has_double_value_; }
+  int32_t NumberValueAsInteger32() const {
+    ASSERT(HasNumberValue());
+    if (has_int32_value_) return int32_value_;
+    return DoubleToInt32(double_value_);
+  }
   bool HasStringValue() const { return handle_->IsString(); }
 
   bool ToBoolean() const;
 
   virtual intptr_t Hashcode() {
     ASSERT(!HEAP->allow_allocation(false));
     return reinterpret_cast<intptr_t>(*handle());
   }
 
 #ifdef DEBUG
@@ skipping 597 matching lines @@
   }
 
   // Add is only commutative if two integer values are added and not if two
   // tagged values are added (because it might be a String concatenation).
   virtual bool IsCommutative() const {
     return !representation().IsTagged();
   }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
+  static HInstruction* NewHAdd(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   virtual HType CalculateInferredType();
 
   DECLARE_CONCRETE_INSTRUCTION(Add)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
   virtual Range* InferRange();
 };
 
 
 class HSub: public HArithmeticBinaryOperation {
  public:
   HSub(HValue* context, HValue* left, HValue* right)
       : HArithmeticBinaryOperation(context, left, right) {
     SetFlag(kCanOverflow);
   }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
+  static HInstruction* NewHSub(Zone* zone,
+                              HValue* context,
+                              HValue* left,
+                              HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Sub)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
   virtual Range* InferRange();
 };
 
 
 class HMul: public HArithmeticBinaryOperation {
  public:
   HMul(HValue* context, HValue* left, HValue* right)
       : HArithmeticBinaryOperation(context, left, right) {
     SetFlag(kCanOverflow);
   }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
   // Only commutative if it is certain that not two objects are multiplicated.
   virtual bool IsCommutative() const {
     return !representation().IsTagged();
   }
 
+  static HInstruction* NewHMul(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Mul)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
   virtual Range* InferRange();
 };
 
 
 class HMod: public HArithmeticBinaryOperation {
  public:
   HMod(HValue* context, HValue* left, HValue* right)
       : HArithmeticBinaryOperation(context, left, right) {
     SetFlag(kCanBeDivByZero);
   }
 
   bool HasPowerOf2Divisor() {
     if (right()->IsConstant() &&
         HConstant::cast(right())->HasInteger32Value()) {
       int32_t value = HConstant::cast(right())->Integer32Value();
       return value != 0 && (IsPowerOf2(value) || IsPowerOf2(-value));
     }
 
     return false;
   }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
+  static HInstruction* NewHMod(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Mod)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
   virtual Range* InferRange();
 };
 
 
 class HDiv: public HArithmeticBinaryOperation {
  public:
   HDiv(HValue* context, HValue* left, HValue* right)
       : HArithmeticBinaryOperation(context, left, right) {
     SetFlag(kCanBeDivByZero);
     SetFlag(kCanOverflow);
   }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
+
+  static HInstruction* NewHDiv(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Div)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
   virtual Range* InferRange();
 };
 
 
 class HBitwise: public HBitwiseBinaryOperation {
  public:
   HBitwise(Token::Value op, HValue* context, HValue* left, HValue* right)
       : HBitwiseBinaryOperation(context, left, right), op_(op) {
         ASSERT(op == Token::BIT_AND ||
                op == Token::BIT_OR ||
                op == Token::BIT_XOR);
       }
 
   Token::Value op() const { return op_; }
 
   virtual bool IsCommutative() const { return true; }
 
+  static HInstruction* NewHBitwise(Zone* zone,
+                                   Token::Value op,
+                                   HValue* context,
+                                   HValue* left,
+                                   HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Bitwise)
 
  protected:
   virtual bool DataEquals(HValue* other) {
     return op() == HBitwise::cast(other)->op();
   }
 
   virtual Range* InferRange();
 
  private:
   Token::Value op_;
 };
 
 
 class HShl: public HBitwiseBinaryOperation {
  public:
   HShl(HValue* context, HValue* left, HValue* right)
       : HBitwiseBinaryOperation(context, left, right) { }
 
   virtual Range* InferRange();
 
+  static HInstruction* NewHShl(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Shl)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 };
 
 
 class HShr: public HBitwiseBinaryOperation {
  public:
   HShr(HValue* context, HValue* left, HValue* right)
       : HBitwiseBinaryOperation(context, left, right) { }
 
   virtual Range* InferRange();
 
+  static HInstruction* NewHShr(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Shr)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 };
 
 
 class HSar: public HBitwiseBinaryOperation {
  public:
   HSar(HValue* context, HValue* left, HValue* right)
       : HBitwiseBinaryOperation(context, left, right) { }
 
   virtual Range* InferRange();
 
+  static HInstruction* NewHSar(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
   DECLARE_CONCRETE_INSTRUCTION(Sar)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 };
 
 
 class HOsrEntry: public HTemplateInstruction<0> {
  public:
   explicit HOsrEntry(int ast_id) : ast_id_(ast_id) {
@@ skipping 1169 matching lines @@
 
   DECLARE_CONCRETE_INSTRUCTION(In)
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_