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src/hotspot/share/opto/valuetypenode.hpp

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  29 #include "opto/connode.hpp"
  30 
  31 class GraphKit;
  32 
  33 class ValueTypeBaseNode : public TypeNode {
  34 protected:
  35   ValueTypeBaseNode(const Type* t, int nb_fields)
  36     : TypeNode(t, nb_fields) {
  37     init_class_id(Class_ValueTypeBase);
  38     Compile::current()->add_value_type(this);
  39   }
  40 
  41   enum { Control,   // Control input
  42          Oop,       // Oop of TypeInstPtr
  43          Values     // Nodes corresponding to values of the value type's fields.
  44                     // Nodes are connected in increasing order of the index of the field they correspond to.
  45   };
  46 
  47   virtual const TypeInstPtr* value_ptr() const = 0;
  48   // Get the klass defining the field layout of the value type
  49   virtual ciValueKlass* value_klass() const = 0;
  50 
  51   int make_scalar_in_safepoint(PhaseIterGVN* igvn, Unique_Node_List& worklist, SafePointNode* sfpt);
  52 
  53   const TypePtr* field_adr_type(Node* base, int offset, ciInstanceKlass* holder, DecoratorSet decorators, PhaseGVN& gvn) const;
  54 
  55 public:
  56   // Support for control flow merges
  57   bool has_phi_inputs(Node* region);
  58   ValueTypeBaseNode* clone_with_phis(PhaseGVN* gvn, Node* region);
  59   ValueTypeBaseNode* merge_with(PhaseGVN* gvn, const ValueTypeBaseNode* other, int pnum, bool transform);
  60   void add_new_path(Node* region);
  61 
  62   // Get oop for heap allocated value type (may be TypePtr::NULL_PTR)
  63   Node* get_oop() const    { return in(Oop); }
  64   void  set_oop(Node* oop) { set_req(Oop, oop); }
  65 
  66   // Value type fields
  67   uint          field_count() const { return req() - Values; }
  68   Node*         field_value(uint index) const;
  69   Node*         field_value_by_offset(int offset, bool recursive = false) const;
  70   void      set_field_value(uint index, Node* value);
  71   void      set_field_value_by_offset(int offset, Node* value);
  72   int           field_offset(uint index) const;
  73   uint          field_index(int offset) const;
  74   ciType*       field_type(uint index) const;
  75   bool          field_is_flattened(uint index) const;
  76   bool          field_is_flattenable(uint index) const;
  77 
  78   // Replace ValueTypeNodes in debug info at safepoints with SafePointScalarObjectNodes
  79   void make_scalar_in_safepoints(PhaseIterGVN* igvn);
  80 
  81   // Store the value type as a flattened (headerless) representation
  82   void store_flattened(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0, DecoratorSet decorators = IN_HEAP | MO_UNORDERED) const;
  83   // Store the field values to memory
  84   void store(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder, int holder_offset = 0, bool deoptimize_on_exception = false, DecoratorSet decorators = IN_HEAP | MO_UNORDERED) const;
  85   // Initialize the value type by loading its field values from memory
  86   void load(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder, int holder_offset = 0, DecoratorSet decorators = IN_HEAP | MO_UNORDERED);
  87 
  88   // Allocates the value type (if not yet allocated)
  89   ValueTypeBaseNode* allocate(GraphKit* kit, bool deoptimize_on_exception = false);
  90   bool is_allocated(PhaseGVN* phase) const;
  91 
  92   void replace_call_results(GraphKit* kit, Node* call, Compile* C);
  93 };
  94 
  95 //------------------------------ValueTypeNode-------------------------------------
  96 // Node representing a value type in C2 IR
  97 class ValueTypeNode : public ValueTypeBaseNode {
  98   friend class ValueTypeBaseNode;
  99   friend class ValueTypePtrNode;
 100 private:
 101   ValueTypeNode(ciValueKlass* vk, Node* oop)
 102     : ValueTypeBaseNode(TypeValueType::make(vk), Values + vk->nof_declared_nonstatic_fields()) {
 103     init_class_id(Class_ValueType);
 104     init_req(Oop, oop);
 105   }
 106 
 107   // Checks if the value type is loaded from memory and if so returns the oop
 108   Node* is_loaded(PhaseGVN* phase, ciValueKlass* vk = NULL, Node* base = NULL, int holder_offset = 0);
 109 
 110   // Checks if the value type fields are all set to default values
 111   bool is_default(PhaseGVN& gvn) const;
 112 
 113   const TypeInstPtr* value_ptr() const { return TypeInstPtr::make(TypePtr::BotPTR, value_klass()); }
 114   ciValueKlass* value_klass() const { return type()->is_valuetype()->value_klass(); }
 115 
 116 public:
 117   // Create uninitialized
 118   static ValueTypeNode* make_uninitialized(PhaseGVN& gvn, ciValueKlass* vk);
 119   // Create with default field values
 120   static ValueTypeNode* make_default(PhaseGVN& gvn, ciValueKlass* vk);
 121   // Create and initialize by loading the field values from an oop
 122   static ValueTypeNode* make_from_oop(GraphKit* kit, Node* oop, ciValueKlass* vk);
 123   // Create and initialize by loading the field values from a flattened field or array
 124   static ValueTypeNode* make_from_flattened(GraphKit* kit, ciValueKlass* vk, Node* obj, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0, DecoratorSet decorators = IN_HEAP | MO_UNORDERED);
 125   // Create and initialize with the inputs or outputs of a MultiNode (method entry or call)
 126   static ValueTypeNode* make_from_multi(GraphKit* kit, MultiNode* multi, ExtendedSignature& sig, ciValueKlass* vk, uint& base_input, bool in);
 127 
 128   ValueTypeNode* make_larval(GraphKit* kit, bool allocate) const;
 129   ValueTypeNode* finish_larval(GraphKit* kit) const;
 130 
 131   // Returns the constant oop of the default value type allocation
 132   static Node* default_oop(PhaseGVN& gvn, ciValueKlass* vk);
 133 
 134   // Allocate all non-flattened value type fields


 138     return tagged_klass(value_klass(), gvn);
 139   }
 140   static Node* tagged_klass(ciValueKlass* vk, PhaseGVN& gvn);
 141   // Pass value type as fields at a call or return
 142   void pass_fields(GraphKit* kit, Node* n, ExtendedSignature& sig, uint& base_input, int base_offset = 0);
 143   // Initialize the value type fields with the inputs or outputs of a MultiNode
 144   void initialize_fields(GraphKit* kit, MultiNode* multi, ExtendedSignature& sig, uint& base_input, int base_offset, bool in);
 145 
 146   // Allocation optimizations
 147   void remove_redundant_allocations(PhaseIterGVN* igvn, PhaseIdealLoop* phase);
 148 
 149   virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
 150   virtual int Opcode() const;
 151 };
 152 
 153 //------------------------------ValueTypePtrNode-------------------------------------
 154 // Node representing a value type as a pointer in C2 IR
 155 class ValueTypePtrNode : public ValueTypeBaseNode {
 156 private:
 157   const TypeInstPtr* value_ptr() const { return type()->isa_instptr(); }
 158   ciValueKlass* value_klass() const { return value_ptr()->value_klass(); }
 159 
 160   ValueTypePtrNode(ciValueKlass* vk, Node* oop)
 161     : ValueTypeBaseNode(TypeInstPtr::make(TypePtr::NotNull, vk), Values + vk->nof_declared_nonstatic_fields()) {
 162     init_class_id(Class_ValueTypePtr);
 163     init_req(Oop, oop);
 164   }
 165 
 166 public:
 167   // Create and initialize with the values of a ValueTypeNode
 168   static ValueTypePtrNode* make_from_value_type(GraphKit* kit, ValueTypeNode* vt, bool deoptimize_on_exception = false);
 169   // Create and initialize by loading the field values from an oop
 170   static ValueTypePtrNode* make_from_oop(GraphKit* kit, Node* oop);
 171 
 172   virtual int Opcode() const;
 173 };
 174 
 175 #endif // SHARE_VM_OPTO_VALUETYPENODE_HPP


  29 #include "opto/connode.hpp"
  30 
  31 class GraphKit;
  32 
  33 class ValueTypeBaseNode : public TypeNode {
  34 protected:
  35   ValueTypeBaseNode(const Type* t, int nb_fields)
  36     : TypeNode(t, nb_fields) {
  37     init_class_id(Class_ValueTypeBase);
  38     Compile::current()->add_value_type(this);
  39   }
  40 
  41   enum { Control,   // Control input
  42          Oop,       // Oop of TypeInstPtr
  43          Values     // Nodes corresponding to values of the value type's fields.
  44                     // Nodes are connected in increasing order of the index of the field they correspond to.
  45   };
  46 
  47   virtual const TypeInstPtr* value_ptr() const = 0;
  48   // Get the klass defining the field layout of the value type
  49   ciValueKlass* value_klass() const { return type()->value_klass(); }
  50 
  51   int make_scalar_in_safepoint(PhaseIterGVN* igvn, Unique_Node_List& worklist, SafePointNode* sfpt);
  52 
  53   const TypePtr* field_adr_type(Node* base, int offset, ciInstanceKlass* holder, DecoratorSet decorators, PhaseGVN& gvn) const;
  54 
  55 public:
  56   // Support for control flow merges
  57   bool has_phi_inputs(Node* region);
  58   ValueTypeBaseNode* clone_with_phis(PhaseGVN* gvn, Node* region);
  59   ValueTypeBaseNode* merge_with(PhaseGVN* gvn, const ValueTypeBaseNode* other, int pnum, bool transform);
  60   void add_new_path(Node* region);
  61 
  62   // Get oop for heap allocated value type (may be TypePtr::NULL_PTR)
  63   Node* get_oop() const    { return in(Oop); }
  64   void  set_oop(Node* oop) { set_req(Oop, oop); }
  65 
  66   // Value type fields
  67   uint          field_count() const { return req() - Values; }
  68   Node*         field_value(uint index) const;
  69   Node*         field_value_by_offset(int offset, bool recursive = false) const;
  70   void      set_field_value(uint index, Node* value);
  71   void      set_field_value_by_offset(int offset, Node* value);
  72   int           field_offset(uint index) const;
  73   uint          field_index(int offset) const;
  74   ciType*       field_type(uint index) const;
  75   bool          field_is_flattened(uint index) const;
  76   bool          field_is_flattenable(uint index) const;
  77 
  78   // Replace ValueTypeNodes in debug info at safepoints with SafePointScalarObjectNodes
  79   void make_scalar_in_safepoints(PhaseIterGVN* igvn);
  80 
  81   // Store the value type as a flattened (headerless) representation
  82   void store_flattened(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0, DecoratorSet decorators = IN_HEAP | MO_UNORDERED) const;
  83   // Store the field values to memory
  84   void store(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder, int holder_offset = 0, bool deoptimize_on_exception = false, DecoratorSet decorators = IN_HEAP | MO_UNORDERED) const;
  85   // Initialize the value type by loading its field values from memory
  86   void load(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder, int holder_offset = 0, DecoratorSet decorators = IN_HEAP | MO_UNORDERED);
  87 
  88   // Allocates the value type (if not yet allocated)
  89   ValueTypeBaseNode* allocate(GraphKit* kit, bool deoptimize_on_exception = false, bool safe_for_replace = true);
  90   bool is_allocated(PhaseGVN* phase) const;
  91 
  92   void replace_call_results(GraphKit* kit, Node* call, Compile* C);
  93 };
  94 
  95 //------------------------------ValueTypeNode-------------------------------------
  96 // Node representing a value type in C2 IR
  97 class ValueTypeNode : public ValueTypeBaseNode {
  98   friend class ValueTypeBaseNode;
  99   friend class ValueTypePtrNode;
 100 private:
 101   ValueTypeNode(ciValueKlass* vk, Node* oop)
 102     : ValueTypeBaseNode(TypeValueType::make(vk), Values + vk->nof_declared_nonstatic_fields()) {
 103     init_class_id(Class_ValueType);
 104     init_req(Oop, oop);
 105   }
 106 
 107   // Checks if the value type is loaded from memory and if so returns the oop
 108   Node* is_loaded(PhaseGVN* phase, ciValueKlass* vk = NULL, Node* base = NULL, int holder_offset = 0);
 109 
 110   // Checks if the value type fields are all set to default values
 111   bool is_default(PhaseGVN& gvn) const;
 112 
 113   const TypeInstPtr* value_ptr() const { return TypeInstPtr::make(TypePtr::BotPTR, value_klass()); }

 114 
 115 public:
 116   // Create uninitialized
 117   static ValueTypeNode* make_uninitialized(PhaseGVN& gvn, ciValueKlass* vk);
 118   // Create with default field values
 119   static ValueTypeNode* make_default(PhaseGVN& gvn, ciValueKlass* vk);
 120   // Create and initialize by loading the field values from an oop
 121   static ValueTypeNode* make_from_oop(GraphKit* kit, Node* oop, ciValueKlass* vk);
 122   // Create and initialize by loading the field values from a flattened field or array
 123   static ValueTypeNode* make_from_flattened(GraphKit* kit, ciValueKlass* vk, Node* obj, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0, DecoratorSet decorators = IN_HEAP | MO_UNORDERED);
 124   // Create and initialize with the inputs or outputs of a MultiNode (method entry or call)
 125   static ValueTypeNode* make_from_multi(GraphKit* kit, MultiNode* multi, ExtendedSignature& sig, ciValueKlass* vk, uint& base_input, bool in);
 126 
 127   ValueTypeNode* make_larval(GraphKit* kit, bool allocate) const;
 128   ValueTypeNode* finish_larval(GraphKit* kit) const;
 129 
 130   // Returns the constant oop of the default value type allocation
 131   static Node* default_oop(PhaseGVN& gvn, ciValueKlass* vk);
 132 
 133   // Allocate all non-flattened value type fields


 137     return tagged_klass(value_klass(), gvn);
 138   }
 139   static Node* tagged_klass(ciValueKlass* vk, PhaseGVN& gvn);
 140   // Pass value type as fields at a call or return
 141   void pass_fields(GraphKit* kit, Node* n, ExtendedSignature& sig, uint& base_input, int base_offset = 0);
 142   // Initialize the value type fields with the inputs or outputs of a MultiNode
 143   void initialize_fields(GraphKit* kit, MultiNode* multi, ExtendedSignature& sig, uint& base_input, int base_offset, bool in);
 144 
 145   // Allocation optimizations
 146   void remove_redundant_allocations(PhaseIterGVN* igvn, PhaseIdealLoop* phase);
 147 
 148   virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
 149   virtual int Opcode() const;
 150 };
 151 
 152 //------------------------------ValueTypePtrNode-------------------------------------
 153 // Node representing a value type as a pointer in C2 IR
 154 class ValueTypePtrNode : public ValueTypeBaseNode {
 155 private:
 156   const TypeInstPtr* value_ptr() const { return type()->isa_instptr(); }

 157 
 158   ValueTypePtrNode(ciValueKlass* vk, Node* oop)
 159     : ValueTypeBaseNode(TypeInstPtr::make(TypePtr::NotNull, vk), Values + vk->nof_declared_nonstatic_fields()) {
 160     init_class_id(Class_ValueTypePtr);
 161     init_req(Oop, oop);
 162   }
 163 
 164 public:
 165   // Create and initialize with the values of a ValueTypeNode
 166   static ValueTypePtrNode* make_from_value_type(GraphKit* kit, ValueTypeNode* vt, bool deoptimize_on_exception = false);
 167   // Create and initialize by loading the field values from an oop
 168   static ValueTypePtrNode* make_from_oop(GraphKit* kit, Node* oop);
 169 
 170   virtual int Opcode() const;
 171 };
 172 
 173 #endif // SHARE_VM_OPTO_VALUETYPENODE_HPP
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