//------------------------------MultiNode-------------------------------------- // This class defines a MultiNode, a Node which produces many values. The // values are wrapped up in a tuple Type, i.e. a TypeTuple. class MultiNode : public Node { public:
MultiNode( uint required ) : Node(required) {
init_class_id(Class_Multi);
} virtualint Opcode() const; virtualconst Type *bottom_type() const = 0; virtualbool is_CFG() const { returntrue; } virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash virtualbool depends_only_on_test() const { returnfalse; } virtualconst RegMask &out_RegMask() const; virtual Node *match( const ProjNode *proj, const Matcher *m ); virtual uint ideal_reg() const { return NotAMachineReg; }
ProjNode* proj_out(uint which_proj) const; // Get a named projection
ProjNode* proj_out_or_null(uint which_proj) const;
ProjNode* proj_out_or_null(uint which_proj, bool is_io_use) const;
};
//------------------------------ProjNode--------------------------------------- // This class defines a Projection node. Projections project a single element // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple // results. class ProjNode : public Node { protected: virtual uint hash() const; virtualbool cmp( const Node &n ) const; virtual uint size_of() const; void check_con() const; // Called from constructor. const Type* proj_type(const Type* t) const;
public:
ProjNode( Node *src, uint con, bool io_use = false )
: Node( src ), _con(con), _is_io_use(io_use)
{
init_class_id(Class_Proj); // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). if (con != TypeFunc::Memory || src->is_Start())
init_flags(Flag_is_dead_loop_safe);
debug_only(check_con());
} const uint _con; // The field in the tuple we are projecting constbool _is_io_use; // Used to distinguish between the projections // used on the control and io paths from a macro node virtualint Opcode() const; virtualbool is_CFG() const; virtualbool depends_only_on_test() const { returnfalse; } virtualconst Type *bottom_type() const; virtualconst TypePtr *adr_type() const; virtualbool pinned() const; virtualconst Type* Value(PhaseGVN* phase) const; virtual uint ideal_reg() const; virtualconst RegMask &out_RegMask() const;
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