21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OPTO_MULTNODE_HPP 26 #define SHARE_VM_OPTO_MULTNODE_HPP 27 28 #include "opto/node.hpp" 29 30 class Matcher; 31 class ProjNode; 32 33 //------------------------------MultiNode-------------------------------------- 34 // This class defines a MultiNode, a Node which produces many values. The 35 // values are wrapped up in a tuple Type, i.e. a TypeTuple. 36 class MultiNode : public Node { 37 public: 38 MultiNode( uint required ) : Node(required) { 39 init_class_id(Class_Multi); 40 } 41 virtual int Opcode() const; 42 virtual const Type *bottom_type() const = 0; 43 virtual bool is_CFG() const { return true; } 44 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash 45 virtual bool depends_only_on_test() const { return false; } 46 virtual const RegMask &out_RegMask() const; 47 virtual Node *match( const ProjNode *proj, const Matcher *m ); 48 virtual uint ideal_reg() const { return NotAMachineReg; } 49 ProjNode* proj_out(uint which_proj) const; // Get a named projection 50 51 }; 52 53 //------------------------------ProjNode--------------------------------------- 54 // This class defines a Projection node. Projections project a single element 55 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple 56 // results. 57 class ProjNode : public Node { 58 protected: 59 virtual uint hash() const; 60 virtual uint cmp( const Node &n ) const; 61 virtual uint size_of() const; 62 void check_con() const; // Called from constructor. 63 const Type* proj_type(const Type* t) const; 64 65 public: 66 ProjNode( Node *src, uint con, bool io_use = false ) 67 : Node( src ), _con(con), _is_io_use(io_use) 68 { 69 init_class_id(Class_Proj); 70 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). 71 if (con != TypeFunc::Memory || src->is_Start()) 72 init_flags(Flag_is_dead_loop_safe); 73 debug_only(check_con()); 74 } 75 const uint _con; // The field in the tuple we are projecting 76 const bool _is_io_use; // Used to distinguish between the projections 77 // used on the control and io paths from a macro node 78 virtual int Opcode() const; 79 virtual bool is_CFG() const; 80 virtual bool depends_only_on_test() const { return false; } 81 virtual const Type *bottom_type() const; 82 virtual const TypePtr *adr_type() const; 83 virtual bool pinned() const; 84 virtual const Type* Value(PhaseGVN* phase) const; 85 virtual uint ideal_reg() const; 86 virtual const RegMask &out_RegMask() const; 87 88 #ifndef PRODUCT 89 virtual void dump_spec(outputStream *st) const; 90 virtual void dump_compact_spec(outputStream *st) const; 91 #endif 92 93 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct" 94 // NULL otherwise 95 CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason); 96 // Return uncommon trap call node for "if(test)-> proj -> ... 97 // | 98 // V | 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OPTO_MULTNODE_HPP 26 #define SHARE_VM_OPTO_MULTNODE_HPP 27 28 #include "opto/node.hpp" 29 30 class Matcher; 31 class ProjNode; 32 33 //------------------------------MultiNode-------------------------------------- 34 // This class defines a MultiNode, a Node which produces many values. The 35 // values are wrapped up in a tuple Type, i.e. a TypeTuple. 36 class MultiNode : public Node { 37 public: 38 MultiNode( uint required ) : Node(required) { 39 init_class_id(Class_Multi); 40 } 41 virtual uint Opcode() const; 42 virtual const Type *bottom_type() const = 0; 43 virtual bool is_CFG() const { return true; } 44 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash 45 virtual bool depends_only_on_test() const { return false; } 46 virtual const RegMask &out_RegMask() const; 47 virtual Node *match( const ProjNode *proj, const Matcher *m ); 48 virtual uint ideal_reg() const { return NotAMachineReg; } 49 ProjNode* proj_out(uint which_proj) const; // Get a named projection 50 51 }; 52 53 //------------------------------ProjNode--------------------------------------- 54 // This class defines a Projection node. Projections project a single element 55 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple 56 // results. 57 class ProjNode : public Node { 58 protected: 59 virtual uint hash() const; 60 virtual uint cmp( const Node &n ) const; 61 virtual uint size_of() const; 62 void check_con() const; // Called from constructor. 63 const Type* proj_type(const Type* t) const; 64 65 public: 66 ProjNode( Node *src, uint con, bool io_use = false ) 67 : Node( src ), _con(con), _is_io_use(io_use) 68 { 69 init_class_id(Class_Proj); 70 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). 71 if (con != TypeFunc::Memory || src->is_Start()) 72 init_flags(Flag_is_dead_loop_safe); 73 debug_only(check_con()); 74 } 75 const uint _con; // The field in the tuple we are projecting 76 const bool _is_io_use; // Used to distinguish between the projections 77 // used on the control and io paths from a macro node 78 virtual uint Opcode() const; 79 virtual bool is_CFG() const; 80 virtual bool depends_only_on_test() const { return false; } 81 virtual const Type *bottom_type() const; 82 virtual const TypePtr *adr_type() const; 83 virtual bool pinned() const; 84 virtual const Type* Value(PhaseGVN* phase) const; 85 virtual uint ideal_reg() const; 86 virtual const RegMask &out_RegMask() const; 87 88 #ifndef PRODUCT 89 virtual void dump_spec(outputStream *st) const; 90 virtual void dump_compact_spec(outputStream *st) const; 91 #endif 92 93 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct" 94 // NULL otherwise 95 CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason); 96 // Return uncommon trap call node for "if(test)-> proj -> ... 97 // | 98 // V |