jdk8-mips64-public/hotspot: src/share/vm/opto/connode.hpp@c1c199dde5c9 (annotated)

src/share/vm/opto/connode.hpp@c1c199dde5c9 (annotated)

src/share/vm/opto/connode.hpp

Wed, 03 Jun 2015 14:22:57 +0200

author: roland
date: Wed, 03 Jun 2015 14:22:57 +0200
changeset 7859: c1c199dde5c9
parent 7789: eb8b5cc64669
child 7994: 04ff2f6cd0eb
child 8285: 535618ab1c04
permissions: -rw-r--r--

8077504: Unsafe load can loose control dependency and cause crash
Summary: Node::depends_only_on_test() should return false for Unsafe loads
Reviewed-by: kvn, adinn

 /*
  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_OPTO_CONNODE_HPP
 #define SHARE_VM_OPTO_CONNODE_HPP
 #include "opto/node.hpp"
 #include "opto/opcodes.hpp"
 #include "opto/type.hpp"
 class PhaseTransform;
 class MachNode;
 //------------------------------ConNode----------------------------------------
 // Simple constants
 class ConNode : public TypeNode {
 public:
   ConNode( const Type *t ) : TypeNode(t->remove_speculative(),1) {
     init_req(0, (Node*)Compile::current()->root());
     init_flags(Flag_is_Con);
   }
   virtual int  Opcode() const;
   virtual uint hash() const;
   virtual const RegMask &out_RegMask() const { return RegMask::Empty; }
   virtual const RegMask &in_RegMask(uint) const { return RegMask::Empty; }
   // Polymorphic factory method:
   static ConNode* make( Compile* C, const Type *t );
 };
 //------------------------------ConINode---------------------------------------
 // Simple integer constants
 class ConINode : public ConNode {
 public:
   ConINode( const TypeInt *t ) : ConNode(t) {}
   virtual int Opcode() const;
   // Factory method:
   static ConINode* make( Compile* C, int con ) {
     return new (C) ConINode( TypeInt::make(con) );
   }
 };
 //------------------------------ConPNode---------------------------------------
 // Simple pointer constants
 class ConPNode : public ConNode {
 public:
   ConPNode( const TypePtr *t ) : ConNode(t) {}
   virtual int Opcode() const;
   // Factory methods:
   static ConPNode* make( Compile *C ,address con ) {
     if (con == NULL)
       return new (C) ConPNode( TypePtr::NULL_PTR ) ;
     else
       return new (C) ConPNode( TypeRawPtr::make(con) );
   }
 };
 //------------------------------ConNNode--------------------------------------
 // Simple narrow oop constants
 class ConNNode : public ConNode {
 public:
   ConNNode( const TypeNarrowOop *t ) : ConNode(t) {}
   virtual int Opcode() const;
 };
 //------------------------------ConNKlassNode---------------------------------
 // Simple narrow klass constants
 class ConNKlassNode : public ConNode {
 public:
   ConNKlassNode( const TypeNarrowKlass *t ) : ConNode(t) {}
   virtual int Opcode() const;
 };
 //------------------------------ConLNode---------------------------------------
 // Simple long constants
 class ConLNode : public ConNode {
 public:
   ConLNode( const TypeLong *t ) : ConNode(t) {}
   virtual int Opcode() const;
   // Factory method:
   static ConLNode* make( Compile *C ,jlong con ) {
     return new (C) ConLNode( TypeLong::make(con) );
   }
 };
 //------------------------------ConFNode---------------------------------------
 // Simple float constants
 class ConFNode : public ConNode {
 public:
   ConFNode( const TypeF *t ) : ConNode(t) {}
   virtual int Opcode() const;
   // Factory method:
   static ConFNode* make( Compile *C, float con  ) {
     return new (C) ConFNode( TypeF::make(con) );
   }
 };
 //------------------------------ConDNode---------------------------------------
 // Simple double constants
 class ConDNode : public ConNode {
 public:
   ConDNode( const TypeD *t ) : ConNode(t) {}
   virtual int Opcode() const;
   // Factory method:
   static ConDNode* make( Compile *C, double con ) {
     return new (C) ConDNode( TypeD::make(con) );
   }
 };
 //------------------------------BinaryNode-------------------------------------
 // Place holder for the 2 conditional inputs to a CMove.  CMove needs 4
 // inputs: the Bool (for the lt/gt/eq/ne bits), the flags (result of some
 // compare), and the 2 values to select between.  The Matcher requires a
 // binary tree so we break it down like this:
 //     (CMove (Binary bol cmp) (Binary src1 src2))
 class BinaryNode : public Node {
 public:
   BinaryNode( Node *n1, Node *n2 ) : Node(0,n1,n2) { }
   virtual int Opcode() const;
   virtual uint ideal_reg() const { return 0; }
 };
 //------------------------------CMoveNode--------------------------------------
 // Conditional move
 class CMoveNode : public TypeNode {
 public:
   enum { Control,               // When is it safe to do this cmove?
          Condition,             // Condition controlling the cmove
          IfFalse,               // Value if condition is false
          IfTrue };              // Value if condition is true
   CMoveNode( Node *bol, Node *left, Node *right, const Type *t ) : TypeNode(t,4)
   {
     init_class_id(Class_CMove);
     // all inputs are nullified in Node::Node(int)
     // init_req(Control,NULL);
     init_req(Condition,bol);
     init_req(IfFalse,left);
     init_req(IfTrue,right);
   }
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   static CMoveNode *make( Compile *C, Node *c, Node *bol, Node *left, Node *right, const Type *t );
   // Helper function to spot cmove graph shapes
   static Node *is_cmove_id( PhaseTransform *phase, Node *cmp, Node *t, Node *f, BoolNode *b );
 };
 //------------------------------CMoveDNode-------------------------------------
 class CMoveDNode : public CMoveNode {
 public:
   CMoveDNode( Node *bol, Node *left, Node *right, const Type* t) : CMoveNode(bol,left,right,t){}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
 };
 //------------------------------CMoveFNode-------------------------------------
 class CMoveFNode : public CMoveNode {
 public:
   CMoveFNode( Node *bol, Node *left, Node *right, const Type* t ) : CMoveNode(bol,left,right,t) {}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
 };
 //------------------------------CMoveINode-------------------------------------
 class CMoveINode : public CMoveNode {
 public:
   CMoveINode( Node *bol, Node *left, Node *right, const TypeInt *ti ) : CMoveNode(bol,left,right,ti){}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
 };
 //------------------------------CMoveLNode-------------------------------------
 class CMoveLNode : public CMoveNode {
 public:
   CMoveLNode(Node *bol, Node *left, Node *right, const TypeLong *tl ) : CMoveNode(bol,left,right,tl){}
   virtual int Opcode() const;
 };
 //------------------------------CMovePNode-------------------------------------
 class CMovePNode : public CMoveNode {
 public:
   CMovePNode( Node *c, Node *bol, Node *left, Node *right, const TypePtr* t ) : CMoveNode(bol,left,right,t) { init_req(Control,c); }
   virtual int Opcode() const;
 };
 //------------------------------CMoveNNode-------------------------------------
 class CMoveNNode : public CMoveNode {
 public:
   CMoveNNode( Node *c, Node *bol, Node *left, Node *right, const Type* t ) : CMoveNode(bol,left,right,t) { init_req(Control,c); }
   virtual int Opcode() const;
 };
 //------------------------------ConstraintCastNode-----------------------------
 // cast to a different range
 class ConstraintCastNode: public TypeNode {
 public:
   ConstraintCastNode (Node *n, const Type *t ): TypeNode(t,2) {
     init_class_id(Class_ConstraintCast);
     init_req(1, n);
   }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual int Opcode() const;
   virtual uint ideal_reg() const = 0;
   virtual Node *Ideal_DU_postCCP( PhaseCCP * );
 };
 //------------------------------CastIINode-------------------------------------
 // cast integer to integer (different range)
 class CastIINode: public ConstraintCastNode {
   private:
   // Can this node be removed post CCP or does it carry a required dependency?
   const bool _carry_dependency;
   protected:
   virtual uint cmp( const Node &n ) const;
   virtual uint size_of() const;
 public:
   CastIINode(Node *n, const Type *t, bool carry_dependency = false)
     : ConstraintCastNode(n,t), _carry_dependency(carry_dependency) {}
   virtual int Opcode() const;
   virtual uint ideal_reg() const { return Op_RegI; }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal_DU_postCCP( PhaseCCP * );
 #ifndef PRODUCT
   virtual void dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CastPPNode-------------------------------------
 // cast pointer to pointer (different type)
 class CastPPNode: public ConstraintCastNode {
 public:
   CastPPNode (Node *n, const Type *t ): ConstraintCastNode(n, t) {}
   virtual int Opcode() const;
   virtual uint ideal_reg() const { return Op_RegP; }
   virtual Node *Ideal_DU_postCCP( PhaseCCP * );
 };
 //------------------------------CheckCastPPNode--------------------------------
 // for _checkcast, cast pointer to pointer (different type), without JOIN,
 class CheckCastPPNode: public TypeNode {
 public:
   CheckCastPPNode( Node *c, Node *n, const Type *t ) : TypeNode(t,2) {
     init_class_id(Class_CheckCastPP);
     init_req(0, c);
     init_req(1, n);
   }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual int   Opcode() const;
   virtual uint  ideal_reg() const { return Op_RegP; }
   // No longer remove CheckCast after CCP as it gives me a place to hang
   // the proper address type - which is required to compute anti-deps.
   //virtual Node *Ideal_DU_postCCP( PhaseCCP * );
 };
 //------------------------------EncodeNarrowPtr--------------------------------
 class EncodeNarrowPtrNode : public TypeNode {
  protected:
   EncodeNarrowPtrNode(Node* value, const Type* type):
     TypeNode(type, 2) {
     init_class_id(Class_EncodeNarrowPtr);
     init_req(0, NULL);
     init_req(1, value);
   }
  public:
   virtual uint  ideal_reg() const { return Op_RegN; }
   virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp );
 };
 //------------------------------EncodeP--------------------------------
 // Encodes an oop pointers into its compressed form
 // Takes an extra argument which is the real heap base as a long which
 // may be useful for code generation in the backend.
 class EncodePNode : public EncodeNarrowPtrNode {
  public:
   EncodePNode(Node* value, const Type* type):
     EncodeNarrowPtrNode(value, type) {
     init_class_id(Class_EncodeP);
   }
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
 };
 //------------------------------EncodePKlass--------------------------------
 // Encodes a klass pointer into its compressed form
 // Takes an extra argument which is the real heap base as a long which
 // may be useful for code generation in the backend.
 class EncodePKlassNode : public EncodeNarrowPtrNode {
  public:
   EncodePKlassNode(Node* value, const Type* type):
     EncodeNarrowPtrNode(value, type) {
     init_class_id(Class_EncodePKlass);
   }
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
 };
 //------------------------------DecodeNarrowPtr--------------------------------
 class DecodeNarrowPtrNode : public TypeNode {
  protected:
   DecodeNarrowPtrNode(Node* value, const Type* type):
     TypeNode(type, 2) {
     init_class_id(Class_DecodeNarrowPtr);
     init_req(0, NULL);
     init_req(1, value);
   }
  public:
   virtual uint  ideal_reg() const { return Op_RegP; }
 };
 //------------------------------DecodeN--------------------------------
 // Converts a narrow oop into a real oop ptr.
 // Takes an extra argument which is the real heap base as a long which
 // may be useful for code generation in the backend.
 class DecodeNNode : public DecodeNarrowPtrNode {
  public:
   DecodeNNode(Node* value, const Type* type):
     DecodeNarrowPtrNode(value, type) {
     init_class_id(Class_DecodeN);
   }
   virtual int Opcode() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
 };
 //------------------------------DecodeNKlass--------------------------------
 // Converts a narrow klass pointer into a real klass ptr.
 // Takes an extra argument which is the real heap base as a long which
 // may be useful for code generation in the backend.
 class DecodeNKlassNode : public DecodeNarrowPtrNode {
  public:
   DecodeNKlassNode(Node* value, const Type* type):
     DecodeNarrowPtrNode(value, type) {
     init_class_id(Class_DecodeNKlass);
   }
   virtual int Opcode() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
 };
 //------------------------------Conv2BNode-------------------------------------
 // Convert int/pointer to a Boolean.  Map zero to zero, all else to 1.
 class Conv2BNode : public Node {
 public:
   Conv2BNode( Node *i ) : Node(0,i) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::BOOL; }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint  ideal_reg() const { return Op_RegI; }
 };
 // The conversions operations are all Alpha sorted.  Please keep it that way!
 //------------------------------ConvD2FNode------------------------------------
 // Convert double to float
 class ConvD2FNode : public Node {
 public:
   ConvD2FNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::FLOAT; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual uint  ideal_reg() const { return Op_RegF; }
 };
 //------------------------------ConvD2INode------------------------------------
 // Convert Double to Integer
 class ConvD2INode : public Node {
 public:
   ConvD2INode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::INT; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual uint  ideal_reg() const { return Op_RegI; }
 };
 //------------------------------ConvD2LNode------------------------------------
 // Convert Double to Long
 class ConvD2LNode : public Node {
 public:
   ConvD2LNode( Node *dbl ) : Node(0,dbl) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeLong::LONG; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 //------------------------------ConvF2DNode------------------------------------
 // Convert Float to a Double.
 class ConvF2DNode : public Node {
 public:
   ConvF2DNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::DOUBLE; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint  ideal_reg() const { return Op_RegD; }
 };
 //------------------------------ConvF2INode------------------------------------
 // Convert float to integer
 class ConvF2INode : public Node {
 public:
   ConvF2INode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::INT; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual uint  ideal_reg() const { return Op_RegI; }
 };
 //------------------------------ConvF2LNode------------------------------------
 // Convert float to long
 class ConvF2LNode : public Node {
 public:
   ConvF2LNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeLong::LONG; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual uint  ideal_reg() const { return Op_RegL; }
 };
 //------------------------------ConvI2DNode------------------------------------
 // Convert Integer to Double
 class ConvI2DNode : public Node {
 public:
   ConvI2DNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::DOUBLE; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint  ideal_reg() const { return Op_RegD; }
 };
 //------------------------------ConvI2FNode------------------------------------
 // Convert Integer to Float
 class ConvI2FNode : public Node {
 public:
   ConvI2FNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::FLOAT; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual uint  ideal_reg() const { return Op_RegF; }
 };
 //------------------------------ConvI2LNode------------------------------------
 // Convert integer to long
 class ConvI2LNode : public TypeNode {
 public:
   ConvI2LNode(Node *in1, const TypeLong* t = TypeLong::INT)
     : TypeNode(t, 2)
   { init_req(1, in1); }
   virtual int Opcode() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual uint  ideal_reg() const { return Op_RegL; }
 };
 //------------------------------ConvL2DNode------------------------------------
 // Convert Long to Double
 class ConvL2DNode : public Node {
 public:
   ConvL2DNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::DOUBLE; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint ideal_reg() const { return Op_RegD; }
 };
 //------------------------------ConvL2FNode------------------------------------
 // Convert Long to Float
 class ConvL2FNode : public Node {
 public:
   ConvL2FNode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::FLOAT; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint  ideal_reg() const { return Op_RegF; }
 };
 //------------------------------ConvL2INode------------------------------------
 // Convert long to integer
 class ConvL2INode : public Node {
 public:
   ConvL2INode( Node *in1 ) : Node(0,in1) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::INT; }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual uint  ideal_reg() const { return Op_RegI; }
 };
 //------------------------------CastX2PNode-------------------------------------
 // convert a machine-pointer-sized integer to a raw pointer
 class CastX2PNode : public Node {
 public:
   CastX2PNode( Node *n ) : Node(NULL, n) {}
   virtual int Opcode() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node *Identity( PhaseTransform *phase );
   virtual uint ideal_reg() const { return Op_RegP; }
   virtual const Type *bottom_type() const { return TypeRawPtr::BOTTOM; }
 };
 //------------------------------CastP2XNode-------------------------------------
 // Used in both 32-bit and 64-bit land.
 // Used for card-marks and unsafe pointer math.
 class CastP2XNode : public Node {
 public:
   CastP2XNode( Node *ctrl, Node *n ) : Node(ctrl, n) {}
   virtual int Opcode() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node *Identity( PhaseTransform *phase );
   virtual uint ideal_reg() const { return Op_RegX; }
   virtual const Type *bottom_type() const { return TypeX_X; }
   // Return false to keep node from moving away from an associated card mark.
   virtual bool depends_only_on_test() const { return false; }
 };
 //------------------------------ThreadLocalNode--------------------------------
 // Ideal Node which returns the base of ThreadLocalStorage.
 class ThreadLocalNode : public Node {
 public:
   ThreadLocalNode( ) : Node((Node*)Compile::current()->root()) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeRawPtr::BOTTOM;}
   virtual uint ideal_reg() const { return Op_RegP; }
 };
 //------------------------------LoadReturnPCNode-------------------------------
 class LoadReturnPCNode: public Node {
 public:
   LoadReturnPCNode(Node *c) : Node(c) { }
   virtual int Opcode() const;
   virtual uint ideal_reg() const { return Op_RegP; }
 };
 //-----------------------------RoundFloatNode----------------------------------
 class RoundFloatNode: public Node {
 public:
   RoundFloatNode(Node* c, Node *in1): Node(c, in1) {}
   virtual int   Opcode() const;
   virtual const Type *bottom_type() const { return Type::FLOAT; }
   virtual uint  ideal_reg() const { return Op_RegF; }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
 };
 //-----------------------------RoundDoubleNode---------------------------------
 class RoundDoubleNode: public Node {
 public:
   RoundDoubleNode(Node* c, Node *in1): Node(c, in1) {}
   virtual int   Opcode() const;
   virtual const Type *bottom_type() const { return Type::DOUBLE; }
   virtual uint  ideal_reg() const { return Op_RegD; }
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
 };
 //------------------------------Opaque1Node------------------------------------
 // A node to prevent unwanted optimizations.  Allows constant folding.
 // Stops value-numbering, Ideal calls or Identity functions.
 class Opaque1Node : public Node {
   virtual uint hash() const ;                  // { return NO_HASH; }
   virtual uint cmp( const Node &n ) const;
 public:
   Opaque1Node( Compile* C, Node *n ) : Node(0,n) {
     // Put it on the Macro nodes list to removed during macro nodes expansion.
     init_flags(Flag_is_macro);
     C->add_macro_node(this);
   }
   // Special version for the pre-loop to hold the original loop limit
   // which is consumed by range check elimination.
   Opaque1Node( Compile* C, Node *n, Node* orig_limit ) : Node(0,n,orig_limit) {
     // Put it on the Macro nodes list to removed during macro nodes expansion.
     init_flags(Flag_is_macro);
     C->add_macro_node(this);
   }
   Node* original_loop_limit() { return req()==3 ? in(2) : NULL; }
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::INT; }
   virtual Node *Identity( PhaseTransform *phase );
 };
 //------------------------------Opaque2Node------------------------------------
 // A node to prevent unwanted optimizations.  Allows constant folding.  Stops
 // value-numbering, most Ideal calls or Identity functions.  This Node is
 // specifically designed to prevent the pre-increment value of a loop trip
 // counter from being live out of the bottom of the loop (hence causing the
 // pre- and post-increment values both being live and thus requiring an extra
 // temp register and an extra move).  If we "accidentally" optimize through
 // this kind of a Node, we'll get slightly pessimal, but correct, code.  Thus
 // it's OK to be slightly sloppy on optimizations here.
 class Opaque2Node : public Node {
   virtual uint hash() const ;                  // { return NO_HASH; }
   virtual uint cmp( const Node &n ) const;
 public:
   Opaque2Node( Compile* C, Node *n ) : Node(0,n) {
     // Put it on the Macro nodes list to removed during macro nodes expansion.
     init_flags(Flag_is_macro);
     C->add_macro_node(this);
   }
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::INT; }
 };
 //------------------------------Opaque3Node------------------------------------
 // A node to prevent unwanted optimizations. Will be optimized only during
 // macro nodes expansion.
 class Opaque3Node : public Opaque2Node {
   int _opt; // what optimization it was used for
 public:
   enum { RTM_OPT };
   Opaque3Node(Compile* C, Node *n, int opt) : Opaque2Node(C, n), _opt(opt) {}
   virtual int Opcode() const;
   bool rtm_opt() const { return (_opt == RTM_OPT); }
 };
 //------------------------------ProfileBooleanNode-------------------------------
 // A node represents value profile for a boolean during parsing.
 // Once parsing is over, the node goes away (during IGVN).
 // It is used to override branch frequencies from MDO (see has_injected_profile in parse2.cpp).
 class ProfileBooleanNode : public Node {
   uint _false_cnt;
   uint _true_cnt;
   bool _consumed;
   bool _delay_removal;
   virtual uint hash() const ;                  // { return NO_HASH; }
   virtual uint cmp( const Node &n ) const;
   public:
   ProfileBooleanNode(Node *n, uint false_cnt, uint true_cnt) : Node(0, n),
           _false_cnt(false_cnt), _true_cnt(true_cnt), _delay_removal(true), _consumed(false) {}
   uint false_count() const { return _false_cnt; }
   uint  true_count() const { return  _true_cnt; }
   void consume() { _consumed = true;  }
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node *Identity(PhaseTransform *phase);
   virtual const Type *bottom_type() const { return TypeInt::BOOL; }
 };
 //----------------------PartialSubtypeCheckNode--------------------------------
 // The 2nd slow-half of a subtype check.  Scan the subklass's 2ndary superklass
 // array for an instance of the superklass.  Set a hidden internal cache on a
 // hit (cache is checked with exposed code in gen_subtype_check()).  Return
 // not zero for a miss or zero for a hit.
 class PartialSubtypeCheckNode : public Node {
 public:
   PartialSubtypeCheckNode(Node* c, Node* sub, Node* super) : Node(c,sub,super) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeRawPtr::BOTTOM; }
   virtual uint ideal_reg() const { return Op_RegP; }
 };
 //
 class MoveI2FNode : public Node {
  public:
   MoveI2FNode( Node *value ) : Node(0,value) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::FLOAT; }
   virtual uint ideal_reg() const { return Op_RegF; }
   virtual const Type* Value( PhaseTransform *phase ) const;
 };
 class MoveL2DNode : public Node {
  public:
   MoveL2DNode( Node *value ) : Node(0,value) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return Type::DOUBLE; }
   virtual uint ideal_reg() const { return Op_RegD; }
   virtual const Type* Value( PhaseTransform *phase ) const;
 };
 class MoveF2INode : public Node {
  public:
   MoveF2INode( Node *value ) : Node(0,value) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeInt::INT; }
   virtual uint ideal_reg() const { return Op_RegI; }
   virtual const Type* Value( PhaseTransform *phase ) const;
 };
 class MoveD2LNode : public Node {
  public:
   MoveD2LNode( Node *value ) : Node(0,value) {}
   virtual int Opcode() const;
   virtual const Type *bottom_type() const { return TypeLong::LONG; }
   virtual uint ideal_reg() const { return Op_RegL; }
   virtual const Type* Value( PhaseTransform *phase ) const;
 };
 //---------- CountBitsNode -----------------------------------------------------
 class CountBitsNode : public Node {
 public:
   CountBitsNode(Node* in1) : Node(0, in1) {}
   const Type* bottom_type() const { return TypeInt::INT; }
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 //---------- CountLeadingZerosINode --------------------------------------------
 // Count leading zeros (0-bit count starting from MSB) of an integer.
 class CountLeadingZerosINode : public CountBitsNode {
 public:
   CountLeadingZerosINode(Node* in1) : CountBitsNode(in1) {}
   virtual int Opcode() const;
   virtual const Type* Value(PhaseTransform* phase) const;
 };
 //---------- CountLeadingZerosLNode --------------------------------------------
 // Count leading zeros (0-bit count starting from MSB) of a long.
 class CountLeadingZerosLNode : public CountBitsNode {
 public:
   CountLeadingZerosLNode(Node* in1) : CountBitsNode(in1) {}
   virtual int Opcode() const;
   virtual const Type* Value(PhaseTransform* phase) const;
 };
 //---------- CountTrailingZerosINode -------------------------------------------
 // Count trailing zeros (0-bit count starting from LSB) of an integer.
 class CountTrailingZerosINode : public CountBitsNode {
 public:
   CountTrailingZerosINode(Node* in1) : CountBitsNode(in1) {}
   virtual int Opcode() const;
   virtual const Type* Value(PhaseTransform* phase) const;
 };
 //---------- CountTrailingZerosLNode -------------------------------------------
 // Count trailing zeros (0-bit count starting from LSB) of a long.
 class CountTrailingZerosLNode : public CountBitsNode {
 public:
   CountTrailingZerosLNode(Node* in1) : CountBitsNode(in1) {}
   virtual int Opcode() const;
   virtual const Type* Value(PhaseTransform* phase) const;
 };
 //---------- PopCountINode -----------------------------------------------------
 // Population count (bit count) of an integer.
 class PopCountINode : public CountBitsNode {
 public:
   PopCountINode(Node* in1) : CountBitsNode(in1) {}
   virtual int Opcode() const;
 };
 //---------- PopCountLNode -----------------------------------------------------
 // Population count (bit count) of a long.
 class PopCountLNode : public CountBitsNode {
 public:
   PopCountLNode(Node* in1) : CountBitsNode(in1) {}
   virtual int Opcode() const;
 };
 #endif // SHARE_VM_OPTO_CONNODE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/connode.hpp@c1c199dde5c9 (annotated)

src/share/vm/opto/connode.hpp