jdk8-mips64-public/hotspot: src/share/vm/opto/mulnode.hpp@96ef09c26978 (annotated)

src/share/vm/opto/mulnode.hpp@96ef09c26978 (annotated)

src/share/vm/opto/mulnode.hpp

Sat, 16 Mar 2013 07:39:14 -0700

author: morris
date: Sat, 16 Mar 2013 07:39:14 -0700
changeset 4760: 96ef09c26978
parent 3882: 8c92982cbbc4
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8009166: [parfait] Null pointer deference in hotspot/src/share/vm/opto/type.cpp
Summary: add guarantee() to as_instance_type()
Reviewed-by: kvn, twisti

 /*
  * 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_MULNODE_HPP
 #define SHARE_VM_OPTO_MULNODE_HPP
 #include "opto/node.hpp"
 #include "opto/opcodes.hpp"
 #include "opto/type.hpp"
 // Portions of code courtesy of Clifford Click
 class PhaseTransform;
 //------------------------------MulNode----------------------------------------
 // Classic MULTIPLY functionality.  This covers all the usual 'multiply'
 // behaviors for an algebraic ring.  Multiply-integer, multiply-float,
 // multiply-double, and binary-and are all inherited from this class.  The
 // various identity values are supplied by virtual functions.
 class MulNode : public Node {
   virtual uint hash() const;
 public:
   MulNode( Node *in1, Node *in2 ): Node(0,in1,in2) {
     init_class_id(Class_Mul);
   }
   // Handle algebraic identities here.  If we have an identity, return the Node
   // we are equivalent to.  We look for "add of zero" as an identity.
   virtual Node *Identity( PhaseTransform *phase );
   // We also canonicalize the Node, moving constants to the right input,
   // and flatten expressions (so that 1+x+2 becomes x+3).
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   // Compute a new Type for this node.  Basically we just do the pre-check,
   // then call the virtual add() to set the type.
   virtual const Type *Value( PhaseTransform *phase ) const;
   // Supplied function returns the product of the inputs.
   // This also type-checks the inputs for sanity.  Guaranteed never to
   // be passed a TOP or BOTTOM type, these are filtered out by a pre-check.
   // This call recognizes the multiplicative zero type.
   virtual const Type *mul_ring( const Type *, const Type * ) const = 0;
   // Supplied function to return the multiplicative identity type
   virtual const Type *mul_id() const = 0;
   // Supplied function to return the additive identity type
   virtual const Type *add_id() const = 0;
   // Supplied function to return the additive opcode
   virtual int add_opcode() const = 0;
   // Supplied function to return the multiplicative opcode
   virtual int mul_opcode() const = 0;
 };
 //------------------------------MulINode---------------------------------------
 // Multiply 2 integers
 class MulINode : public MulNode {
 public:
   MulINode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *mul_ring( const Type *, const Type * ) const;
   const Type *mul_id() const { return TypeInt::ONE; }
   const Type *add_id() const { return TypeInt::ZERO; }
   int add_opcode() const { return Op_AddI; }
   int mul_opcode() const { return Op_MulI; }
   const Type *bottom_type() const { return TypeInt::INT; }
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 //------------------------------MulLNode---------------------------------------
 // Multiply 2 longs
 class MulLNode : public MulNode {
 public:
   MulLNode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *mul_ring( const Type *, const Type * ) const;
   const Type *mul_id() const { return TypeLong::ONE; }
   const Type *add_id() const { return TypeLong::ZERO; }
   int add_opcode() const { return Op_AddL; }
   int mul_opcode() const { return Op_MulL; }
   const Type *bottom_type() const { return TypeLong::LONG; }
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 //------------------------------MulFNode---------------------------------------
 // Multiply 2 floats
 class MulFNode : public MulNode {
 public:
   MulFNode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
   virtual int Opcode() const;
   virtual const Type *mul_ring( const Type *, const Type * ) const;
   const Type *mul_id() const { return TypeF::ONE; }
   const Type *add_id() const { return TypeF::ZERO; }
   int add_opcode() const { return Op_AddF; }
   int mul_opcode() const { return Op_MulF; }
   const Type *bottom_type() const { return Type::FLOAT; }
   virtual uint ideal_reg() const { return Op_RegF; }
 };
 //------------------------------MulDNode---------------------------------------
 // Multiply 2 doubles
 class MulDNode : public MulNode {
 public:
   MulDNode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
   virtual int Opcode() const;
   virtual const Type *mul_ring( const Type *, const Type * ) const;
   const Type *mul_id() const { return TypeD::ONE; }
   const Type *add_id() const { return TypeD::ZERO; }
   int add_opcode() const { return Op_AddD; }
   int mul_opcode() const { return Op_MulD; }
   const Type *bottom_type() const { return Type::DOUBLE; }
   virtual uint ideal_reg() const { return Op_RegD; }
 };
 //-------------------------------MulHiLNode------------------------------------
 // Upper 64 bits of a 64 bit by 64 bit multiply
 class MulHiLNode : public Node {
 public:
   MulHiLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeLong::LONG; }
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 //------------------------------AndINode---------------------------------------
 // Logically AND 2 integers.  Included with the MUL nodes because it inherits
 // all the behavior of multiplication on a ring.
 class AndINode : public MulINode {
 public:
   AndINode( Node *in1, Node *in2 ) : MulINode(in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *mul_ring( const Type *, const Type * ) const;
   const Type *mul_id() const { return TypeInt::MINUS_1; }
   const Type *add_id() const { return TypeInt::ZERO; }
   int add_opcode() const { return Op_OrI; }
   int mul_opcode() const { return Op_AndI; }
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 //------------------------------AndINode---------------------------------------
 // Logically AND 2 longs.  Included with the MUL nodes because it inherits
 // all the behavior of multiplication on a ring.
 class AndLNode : public MulLNode {
 public:
   AndLNode( Node *in1, Node *in2 ) : MulLNode(in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *mul_ring( const Type *, const Type * ) const;
   const Type *mul_id() const { return TypeLong::MINUS_1; }
   const Type *add_id() const { return TypeLong::ZERO; }
   int add_opcode() const { return Op_OrL; }
   int mul_opcode() const { return Op_AndL; }
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 //------------------------------LShiftINode------------------------------------
 // Logical shift left
 class LShiftINode : public Node {
 public:
   LShiftINode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeInt::INT; }
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 //------------------------------LShiftLNode------------------------------------
 // Logical shift left
 class LShiftLNode : public Node {
 public:
   LShiftLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeLong::LONG; }
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 //------------------------------RShiftINode------------------------------------
 // Signed shift right
 class RShiftINode : public Node {
 public:
   RShiftINode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeInt::INT; }
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 //------------------------------RShiftLNode------------------------------------
 // Signed shift right
 class RShiftLNode : public Node {
 public:
   RShiftLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeLong::LONG; }
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 //------------------------------URShiftINode-----------------------------------
 // Logical shift right
 class URShiftINode : public Node {
 public:
   URShiftINode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeInt::INT; }
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 //------------------------------URShiftLNode-----------------------------------
 // Logical shift right
 class URShiftLNode : public Node {
 public:
   URShiftLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
   virtual int Opcode() const;
   virtual Node *Identity( PhaseTransform *phase );
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   const Type *bottom_type() const { return TypeLong::LONG; }
   virtual uint ideal_reg() const { return Op_RegL; }
 };
 #endif // SHARE_VM_OPTO_MULNODE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/mulnode.hpp@96ef09c26978 (annotated)

src/share/vm/opto/mulnode.hpp