jdk8-mips64-public/hotspot: src/share/vm/opto/type.hpp@a61af66fc99e (annotated)

src/share/vm/opto/type.hpp@a61af66fc99e (annotated)

src/share/vm/opto/type.hpp

Sat, 01 Dec 2007 00:00:00 +0000

author: duke
date: Sat, 01 Dec 2007 00:00:00 +0000
changeset 435: a61af66fc99e
child 452: ff5961f4c095
permissions: -rw-r--r--

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 /*
  * Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 // Portions of code courtesy of Clifford Click
 // Optimization - Graph Style
 // This class defines a Type lattice.  The lattice is used in the constant
 // propagation algorithms, and for some type-checking of the iloc code.
 // Basic types include RSD's (lower bound, upper bound, stride for integers),
 // float & double precision constants, sets of data-labels and code-labels.
 // The complete lattice is described below.  Subtypes have no relationship to
 // up or down in the lattice; that is entirely determined by the behavior of
 // the MEET/JOIN functions.
 class Dict;
 class Type;
 class   TypeD;
 class   TypeF;
 class   TypeInt;
 class   TypeLong;
 class   TypeAry;
 class   TypeTuple;
 class   TypePtr;
 class     TypeRawPtr;
 class     TypeOopPtr;
 class       TypeInstPtr;
 class       TypeAryPtr;
 class       TypeKlassPtr;
 //------------------------------Type-------------------------------------------
 // Basic Type object, represents a set of primitive Values.
 // Types are hash-cons'd into a private class dictionary, so only one of each
 // different kind of Type exists.  Types are never modified after creation, so
 // all their interesting fields are constant.
 class Type {
 public:
   enum TYPES {
     Bad=0,                      // Type check
     Control,                    // Control of code (not in lattice)
     Top,                        // Top of the lattice
     Int,                        // Integer range (lo-hi)
     Long,                       // Long integer range (lo-hi)
     Half,                       // Placeholder half of doubleword
     Tuple,                      // Method signature or object layout
     Array,                      // Array types
     AnyPtr,                     // Any old raw, klass, inst, or array pointer
     RawPtr,                     // Raw (non-oop) pointers
     OopPtr,                     // Any and all Java heap entities
     InstPtr,                    // Instance pointers (non-array objects)
     AryPtr,                     // Array pointers
     KlassPtr,                   // Klass pointers
     // (Ptr order matters:  See is_ptr, isa_ptr, is_oopptr, isa_oopptr.)
     Function,                   // Function signature
     Abio,                       // Abstract I/O
     Return_Address,             // Subroutine return address
     Memory,                     // Abstract store
     FloatTop,                   // No float value
     FloatCon,                   // Floating point constant
     FloatBot,                   // Any float value
     DoubleTop,                  // No double value
     DoubleCon,                  // Double precision constant
     DoubleBot,                  // Any double value
     Bottom,                     // Bottom of lattice
     lastype                     // Bogus ending type (not in lattice)
   };
   // Signal values for offsets from a base pointer
   enum OFFSET_SIGNALS {
     OffsetTop = -2000000000,    // undefined offset
     OffsetBot = -2000000001     // any possible offset
   };
   // Min and max WIDEN values.
   enum WIDEN {
     WidenMin = 0,
     WidenMax = 3
   };
 private:
   // Dictionary of types shared among compilations.
   static Dict* _shared_type_dict;
   static int uhash( const Type *const t );
   // Structural equality check.  Assumes that cmp() has already compared
   // the _base types and thus knows it can cast 't' appropriately.
   virtual bool eq( const Type *t ) const;
   // Top-level hash-table of types
   static Dict *type_dict() {
     return Compile::current()->type_dict();
   }
   // DUAL operation: reflect around lattice centerline.  Used instead of
   // join to ensure my lattice is symmetric up and down.  Dual is computed
   // lazily, on demand, and cached in _dual.
   const Type *_dual;            // Cached dual value
   // Table for efficient dualing of base types
   static const TYPES dual_type[lastype];
 protected:
   // Each class of type is also identified by its base.
   const TYPES _base;            // Enum of Types type
   Type( TYPES t ) : _dual(NULL),  _base(t) {} // Simple types
   // ~Type();                   // Use fast deallocation
   const Type *hashcons();       // Hash-cons the type
 public:
   inline void* operator new( size_t x ) {
     Compile* compile = Compile::current();
     compile->set_type_last_size(x);
     void *temp = compile->type_arena()->Amalloc_D(x);
     compile->set_type_hwm(temp);
     return temp;
   }
   inline void operator delete( void* ptr ) {
     Compile* compile = Compile::current();
     compile->type_arena()->Afree(ptr,compile->type_last_size());
   }
   // Initialize the type system for a particular compilation.
   static void Initialize(Compile* compile);
   // Initialize the types shared by all compilations.
   static void Initialize_shared(Compile* compile);
   TYPES base() const {
     assert(_base > Bad && _base < lastype, "sanity");
     return _base;
   }
   // Create a new hash-consd type
   static const Type *make(enum TYPES);
   // Test for equivalence of types
   static int cmp( const Type *const t1, const Type *const t2 );
   // Test for higher or equal in lattice
   int higher_equal( const Type *t ) const { return !cmp(meet(t),t); }
   // MEET operation; lower in lattice.
   const Type *meet( const Type *t ) const;
   // WIDEN: 'widens' for Ints and other range types
   virtual const Type *widen( const Type *old ) const { return this; }
   // NARROW: complement for widen, used by pessimistic phases
   virtual const Type *narrow( const Type *old ) const { return this; }
   // DUAL operation: reflect around lattice centerline.  Used instead of
   // join to ensure my lattice is symmetric up and down.
   const Type *dual() const { return _dual; }
   // Compute meet dependent on base type
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // JOIN operation; higher in lattice.  Done by finding the dual of the
   // meet of the dual of the 2 inputs.
   const Type *join( const Type *t ) const {
     return dual()->meet(t->dual())->dual(); }
   // Modified version of JOIN adapted to the needs Node::Value.
   // Normalizes all empty values to TOP.  Does not kill _widen bits.
   // Currently, it also works around limitations involving interface types.
   virtual const Type *filter( const Type *kills ) const;
   // Convenience access
   float getf() const;
   double getd() const;
   const TypeInt    *is_int() const;
   const TypeInt    *isa_int() const;             // Returns NULL if not an Int
   const TypeLong   *is_long() const;
   const TypeLong   *isa_long() const;            // Returns NULL if not a Long
   const TypeD      *is_double_constant() const;  // Asserts it is a DoubleCon
   const TypeD      *isa_double_constant() const; // Returns NULL if not a DoubleCon
   const TypeF      *is_float_constant() const;   // Asserts it is a FloatCon
   const TypeF      *isa_float_constant() const;  // Returns NULL if not a FloatCon
   const TypeTuple  *is_tuple() const;            // Collection of fields, NOT a pointer
   const TypeAry    *is_ary() const;              // Array, NOT array pointer
   const TypePtr    *is_ptr() const;              // Asserts it is a ptr type
   const TypePtr    *isa_ptr() const;             // Returns NULL if not ptr type
   const TypeRawPtr *is_rawptr() const;           // NOT Java oop
   const TypeOopPtr *isa_oopptr() const;          // Returns NULL if not ptr type
   const TypeKlassPtr *isa_klassptr() const; // Returns NULL if not KlassPtr
   const TypeKlassPtr *is_klassptr() const; // assert if not KlassPtr
   const TypeOopPtr  *is_oopptr() const;          // Java-style GC'd pointer
   const TypeInstPtr *isa_instptr() const;        // Returns NULL if not InstPtr
   const TypeInstPtr *is_instptr() const;         // Instance
   const TypeAryPtr *isa_aryptr() const;          // Returns NULL if not AryPtr
   const TypeAryPtr *is_aryptr() const;           // Array oop
   virtual bool      is_finite() const;           // Has a finite value
   virtual bool      is_nan()    const;           // Is not a number (NaN)
   // Special test for register pressure heuristic
   bool is_floatingpoint() const;        // True if Float or Double base type
   // Do you have memory, directly or through a tuple?
   bool has_memory( ) const;
   // Are you a pointer type or not?
   bool isa_oop_ptr() const;
   // TRUE if type is a singleton
   virtual bool singleton(void) const;
   // TRUE if type is above the lattice centerline, and is therefore vacuous
   virtual bool empty(void) const;
   // Return a hash for this type.  The hash function is public so ConNode
   // (constants) can hash on their constant, which is represented by a Type.
   virtual int hash() const;
   // Map ideal registers (machine types) to ideal types
   static const Type *mreg2type[];
   // Printing, statistics
   static const char * const msg[lastype]; // Printable strings
 #ifndef PRODUCT
   void         dump_on(outputStream *st) const;
   void         dump() const {
     dump_on(tty);
   }
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
   static  void dump_stats();
   static  void verify_lastype();          // Check that arrays match type enum
 #endif
   void typerr(const Type *t) const; // Mixing types error
   // Create basic type
   static const Type* get_const_basic_type(BasicType type) {
     assert((uint)type <= T_CONFLICT && _const_basic_type[type] != NULL, "bad type");
     return _const_basic_type[type];
   }
   // Mapping to the array element's basic type.
   BasicType array_element_basic_type() const;
   // Create standard type for a ciType:
   static const Type* get_const_type(ciType* type);
   // Create standard zero value:
   static const Type* get_zero_type(BasicType type) {
     assert((uint)type <= T_CONFLICT && _zero_type[type] != NULL, "bad type");
     return _zero_type[type];
   }
   // Report if this is a zero value (not top).
   bool is_zero_type() const {
     BasicType type = basic_type();
     if (type == T_VOID || type >= T_CONFLICT)
       return false;
     else
       return (this == _zero_type[type]);
   }
   // Convenience common pre-built types.
   static const Type *ABIO;
   static const Type *BOTTOM;
   static const Type *CONTROL;
   static const Type *DOUBLE;
   static const Type *FLOAT;
   static const Type *HALF;
   static const Type *MEMORY;
   static const Type *MULTI;
   static const Type *RETURN_ADDRESS;
   static const Type *TOP;
   // Mapping from compiler type to VM BasicType
   BasicType basic_type() const { return _basic_type[_base]; }
   // Mapping from CI type system to compiler type:
   static const Type* get_typeflow_type(ciType* type);
 private:
   // support arrays
   static const BasicType _basic_type[];
   static const Type*        _zero_type[T_CONFLICT+1];
   static const Type* _const_basic_type[T_CONFLICT+1];
 };
 //------------------------------TypeF------------------------------------------
 // Class of Float-Constant Types.
 class TypeF : public Type {
   TypeF( float f ) : Type(FloatCon), _f(f) {};
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 public:
   const float _f;               // Float constant
   static const TypeF *make(float f);
   virtual bool        is_finite() const;  // Has a finite value
   virtual bool        is_nan()    const;  // Is not a number (NaN)
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeF *ZERO; // positive zero only
   static const TypeF *ONE;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
 #endif
 };
 //------------------------------TypeD------------------------------------------
 // Class of Double-Constant Types.
 class TypeD : public Type {
   TypeD( double d ) : Type(DoubleCon), _d(d) {};
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 public:
   const double _d;              // Double constant
   static const TypeD *make(double d);
   virtual bool        is_finite() const;  // Has a finite value
   virtual bool        is_nan()    const;  // Is not a number (NaN)
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeD *ZERO; // positive zero only
   static const TypeD *ONE;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
 #endif
 };
 //------------------------------TypeInt----------------------------------------
 // Class of integer ranges, the set of integers between a lower bound and an
 // upper bound, inclusive.
 class TypeInt : public Type {
   TypeInt( jint lo, jint hi, int w );
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 public:
   const jint _lo, _hi;          // Lower bound, upper bound
   const short _widen;           // Limit on times we widen this sucker
   static const TypeInt *make(jint lo);
   // must always specify w
   static const TypeInt *make(jint lo, jint hi, int w);
   // Check for single integer
   int is_con() const { return _lo==_hi; }
   bool is_con(int i) const { return is_con() && _lo == i; }
   jint get_con() const { assert( is_con(), "" );  return _lo; }
   virtual bool        is_finite() const;  // Has a finite value
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   virtual const Type *widen( const Type *t ) const;
   virtual const Type *narrow( const Type *t ) const;
   // Do not kill _widen bits.
   virtual const Type *filter( const Type *kills ) const;
   // Convenience common pre-built types.
   static const TypeInt *MINUS_1;
   static const TypeInt *ZERO;
   static const TypeInt *ONE;
   static const TypeInt *BOOL;
   static const TypeInt *CC;
   static const TypeInt *CC_LT;  // [-1]  == MINUS_1
   static const TypeInt *CC_GT;  // [1]   == ONE
   static const TypeInt *CC_EQ;  // [0]   == ZERO
   static const TypeInt *CC_LE;  // [-1,0]
   static const TypeInt *CC_GE;  // [0,1] == BOOL (!)
   static const TypeInt *BYTE;
   static const TypeInt *CHAR;
   static const TypeInt *SHORT;
   static const TypeInt *POS;
   static const TypeInt *POS1;
   static const TypeInt *INT;
   static const TypeInt *SYMINT; // symmetric range [-max_jint..max_jint]
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
 #endif
 };
 //------------------------------TypeLong---------------------------------------
 // Class of long integer ranges, the set of integers between a lower bound and
 // an upper bound, inclusive.
 class TypeLong : public Type {
   TypeLong( jlong lo, jlong hi, int w );
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 public:
   const jlong _lo, _hi;         // Lower bound, upper bound
   const short _widen;           // Limit on times we widen this sucker
   static const TypeLong *make(jlong lo);
   // must always specify w
   static const TypeLong *make(jlong lo, jlong hi, int w);
   // Check for single integer
   int is_con() const { return _lo==_hi; }
   jlong get_con() const { assert( is_con(), "" ); return _lo; }
   virtual bool        is_finite() const;  // Has a finite value
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   virtual const Type *widen( const Type *t ) const;
   virtual const Type *narrow( const Type *t ) const;
   // Do not kill _widen bits.
   virtual const Type *filter( const Type *kills ) const;
   // Convenience common pre-built types.
   static const TypeLong *MINUS_1;
   static const TypeLong *ZERO;
   static const TypeLong *ONE;
   static const TypeLong *POS;
   static const TypeLong *LONG;
   static const TypeLong *INT;    // 32-bit subrange [min_jint..max_jint]
   static const TypeLong *UINT;   // 32-bit unsigned [0..max_juint]
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint, outputStream *st  ) const;// Specialized per-Type dumping
 #endif
 };
 //------------------------------TypeTuple--------------------------------------
 // Class of Tuple Types, essentially type collections for function signatures
 // and class layouts.  It happens to also be a fast cache for the HotSpot
 // signature types.
 class TypeTuple : public Type {
   TypeTuple( uint cnt, const Type **fields ) : Type(Tuple), _cnt(cnt), _fields(fields) { }
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 public:
   const uint          _cnt;              // Count of fields
   const Type ** const _fields;           // Array of field types
   // Accessors:
   uint cnt() const { return _cnt; }
   const Type* field_at(uint i) const {
     assert(i < _cnt, "oob");
     return _fields[i];
   }
   void set_field_at(uint i, const Type* t) {
     assert(i < _cnt, "oob");
     _fields[i] = t;
   }
   static const TypeTuple *make( uint cnt, const Type **fields );
   static const TypeTuple *make_range(ciSignature *sig);
   static const TypeTuple *make_domain(ciInstanceKlass* recv, ciSignature *sig);
   // Subroutine call type with space allocated for argument types
   static const Type **fields( uint arg_cnt );
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeTuple *IFBOTH;
   static const TypeTuple *IFFALSE;
   static const TypeTuple *IFTRUE;
   static const TypeTuple *IFNEITHER;
   static const TypeTuple *LOOPBODY;
   static const TypeTuple *MEMBAR;
   static const TypeTuple *STORECONDITIONAL;
   static const TypeTuple *START_I2C;
   static const TypeTuple *INT_PAIR;
   static const TypeTuple *LONG_PAIR;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint, outputStream *st  ) const; // Specialized per-Type dumping
 #endif
 };
 //------------------------------TypeAry----------------------------------------
 // Class of Array Types
 class TypeAry : public Type {
   TypeAry( const Type *elem, const TypeInt *size) : Type(Array),
     _elem(elem), _size(size) {}
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 private:
   const Type *_elem;            // Element type of array
   const TypeInt *_size;         // Elements in array
   friend class TypeAryPtr;
 public:
   static const TypeAry *make(  const Type *elem, const TypeInt *size);
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   bool ary_must_be_exact() const;  // true if arrays of such are never generic
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint, outputStream *st  ) const; // Specialized per-Type dumping
 #endif
 };
 //------------------------------TypePtr----------------------------------------
 // Class of machine Pointer Types: raw data, instances or arrays.
 // If the _base enum is AnyPtr, then this refers to all of the above.
 // Otherwise the _base will indicate which subset of pointers is affected,
 // and the class will be inherited from.
 class TypePtr : public Type {
 public:
   enum PTR { TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, lastPTR };
 protected:
   TypePtr( TYPES t, PTR ptr, int offset ) : Type(t), _ptr(ptr), _offset(offset) {}
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   static const PTR ptr_meet[lastPTR][lastPTR];
   static const PTR ptr_dual[lastPTR];
   static const char * const ptr_msg[lastPTR];
 public:
   const int _offset;            // Offset into oop, with TOP & BOT
   const PTR _ptr;               // Pointer equivalence class
   const int offset() const { return _offset; }
   const PTR ptr()    const { return _ptr; }
   static const TypePtr *make( TYPES t, PTR ptr, int offset );
   // Return a 'ptr' version of this type
   virtual const Type *cast_to_ptr_type(PTR ptr) const;
   virtual intptr_t get_con() const;
   virtual const TypePtr *add_offset( int offset ) const;
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
   virtual const Type *xmeet( const Type *t ) const;
   int meet_offset( int offset ) const;
   int dual_offset( ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // meet, dual and join over pointer equivalence sets
   PTR meet_ptr( const PTR in_ptr ) const { return ptr_meet[in_ptr][ptr()]; }
   PTR dual_ptr()                   const { return ptr_dual[ptr()];      }
   // This is textually confusing unless one recalls that
   // join(t) == dual()->meet(t->dual())->dual().
   PTR join_ptr( const PTR in_ptr ) const {
     return ptr_dual[ ptr_meet[ ptr_dual[in_ptr] ] [ dual_ptr() ] ];
   }
   // Tests for relation to centerline of type lattice:
   static bool above_centerline(PTR ptr) { return (ptr <= AnyNull); }
   static bool below_centerline(PTR ptr) { return (ptr >= NotNull); }
   // Convenience common pre-built types.
   static const TypePtr *NULL_PTR;
   static const TypePtr *NOTNULL;
   static const TypePtr *BOTTOM;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st  ) const;
 #endif
 };
 //------------------------------TypeRawPtr-------------------------------------
 // Class of raw pointers, pointers to things other than Oops.  Examples
 // include the stack pointer, top of heap, card-marking area, handles, etc.
 class TypeRawPtr : public TypePtr {
 protected:
   TypeRawPtr( PTR ptr, address bits ) : TypePtr(RawPtr,ptr,0), _bits(bits){}
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;     // Type specific hashing
   const address _bits;          // Constant value, if applicable
   static const TypeRawPtr *make( PTR ptr );
   static const TypeRawPtr *make( address bits );
   // Return a 'ptr' version of this type
   virtual const Type *cast_to_ptr_type(PTR ptr) const;
   virtual intptr_t get_con() const;
   virtual const TypePtr *add_offset( int offset ) const;
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeRawPtr *BOTTOM;
   static const TypeRawPtr *NOTNULL;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st  ) const;
 #endif
 };
 //------------------------------TypeOopPtr-------------------------------------
 // Some kind of oop (Java pointer), either klass or instance or array.
 class TypeOopPtr : public TypePtr {
 protected:
   TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id ) : TypePtr(t, ptr, offset), _const_oop(o), _klass(k), _klass_is_exact(xk), _instance_id(instance_id) { }
 public:
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   enum {
    UNKNOWN_INSTANCE = 0
   };
 protected:
   int xadd_offset( int offset ) const;
   // Oop is NULL, unless this is a constant oop.
   ciObject*     _const_oop;   // Constant oop
   // If _klass is NULL, then so is _sig.  This is an unloaded klass.
   ciKlass*      _klass;       // Klass object
   // Does the type exclude subclasses of the klass?  (Inexact == polymorphic.)
   bool          _klass_is_exact;
   int          _instance_id;   // if not UNKNOWN_INSTANCE, indicates that this is a particular instance
                                // of this type which is distinct.  This is the  the node index of the
                                // node creating this instance
   static const TypeOopPtr* make_from_klass_common(ciKlass* klass, bool klass_change, bool try_for_exact);
   int dual_instance()      const { return -_instance_id; }
   int meet_instance(int uid) const;
 public:
   // Creates a type given a klass. Correctly handles multi-dimensional arrays
   // Respects UseUniqueSubclasses.
   // If the klass is final, the resulting type will be exact.
   static const TypeOopPtr* make_from_klass(ciKlass* klass) {
     return make_from_klass_common(klass, true, false);
   }
   // Same as before, but will produce an exact type, even if
   // the klass is not final, as long as it has exactly one implementation.
   static const TypeOopPtr* make_from_klass_unique(ciKlass* klass) {
     return make_from_klass_common(klass, true, true);
   }
   // Same as before, but does not respects UseUniqueSubclasses.
   // Use this only for creating array element types.
   static const TypeOopPtr* make_from_klass_raw(ciKlass* klass) {
     return make_from_klass_common(klass, false, false);
   }
   // Creates a singleton type given an object.
   static const TypeOopPtr* make_from_constant(ciObject* o);
   // Make a generic (unclassed) pointer to an oop.
   static const TypeOopPtr* make(PTR ptr, int offset);
   ciObject* const_oop()    const { return _const_oop; }
   virtual ciKlass* klass() const { return _klass;     }
   bool klass_is_exact()    const { return _klass_is_exact; }
   bool is_instance()       const { return _instance_id != UNKNOWN_INSTANCE; }
   uint instance_id()       const { return _instance_id; }
   virtual intptr_t get_con() const;
   virtual const Type *cast_to_ptr_type(PTR ptr) const;
   virtual const Type *cast_to_exactness(bool klass_is_exact) const;
   virtual const TypeOopPtr *cast_to_instance(int instance_id) const;
   // corresponding pointer to klass, for a given instance
   const TypeKlassPtr* as_klass_type() const;
   virtual const TypePtr *add_offset( int offset ) const;
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Do not allow interface-vs.-noninterface joins to collapse to top.
   virtual const Type *filter( const Type *kills ) const;
   // Convenience common pre-built type.
   static const TypeOopPtr *BOTTOM;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
 #endif
 };
 //------------------------------TypeInstPtr------------------------------------
 // Class of Java object pointers, pointing either to non-array Java instances
 // or to a klassOop (including array klasses).
 class TypeInstPtr : public TypeOopPtr {
   TypeInstPtr( PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id );
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   ciSymbol*  _name;        // class name
  public:
   ciSymbol* name()         const { return _name; }
   bool  is_loaded() const { return _klass->is_loaded(); }
   // Make a pointer to a constant oop.
   static const TypeInstPtr *make(ciObject* o) {
     return make(TypePtr::Constant, o->klass(), true, o, 0);
   }
   // Make a pointer to a constant oop with offset.
   static const TypeInstPtr *make(ciObject* o, int offset) {
     return make(TypePtr::Constant, o->klass(), true, o, offset);
   }
   // Make a pointer to some value of type klass.
   static const TypeInstPtr *make(PTR ptr, ciKlass* klass) {
     return make(ptr, klass, false, NULL, 0);
   }
   // Make a pointer to some non-polymorphic value of exactly type klass.
   static const TypeInstPtr *make_exact(PTR ptr, ciKlass* klass) {
     return make(ptr, klass, true, NULL, 0);
   }
   // Make a pointer to some value of type klass with offset.
   static const TypeInstPtr *make(PTR ptr, ciKlass* klass, int offset) {
     return make(ptr, klass, false, NULL, offset);
   }
   // Make a pointer to an oop.
   static const TypeInstPtr *make(PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id = 0 );
   // If this is a java.lang.Class constant, return the type for it or NULL.
   // Pass to Type::get_const_type to turn it to a type, which will usually
   // be a TypeInstPtr, but may also be a TypeInt::INT for int.class, etc.
   ciType* java_mirror_type() const;
   virtual const Type *cast_to_ptr_type(PTR ptr) const;
   virtual const Type *cast_to_exactness(bool klass_is_exact) const;
   virtual const TypeOopPtr *cast_to_instance(int instance_id) const;
   virtual const TypePtr *add_offset( int offset ) const;
   virtual const Type *xmeet( const Type *t ) const;
   virtual const TypeInstPtr *xmeet_unloaded( const TypeInstPtr *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeInstPtr *NOTNULL;
   static const TypeInstPtr *BOTTOM;
   static const TypeInstPtr *MIRROR;
   static const TypeInstPtr *MARK;
   static const TypeInstPtr *KLASS;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
 #endif
 };
 //------------------------------TypeAryPtr-------------------------------------
 // Class of Java array pointers
 class TypeAryPtr : public TypeOopPtr {
   TypeAryPtr( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) : TypeOopPtr(AryPtr,ptr,k,xk,o,offset, instance_id), _ary(ary) {};
   virtual bool eq( const Type *t ) const;
   virtual int hash() const;     // Type specific hashing
   const TypeAry *_ary;          // Array we point into
 public:
   // Accessors
   ciKlass* klass() const;
   const TypeAry* ary() const  { return _ary; }
   const Type*    elem() const { return _ary->_elem; }
   const TypeInt* size() const { return _ary->_size; }
   static const TypeAryPtr *make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id = 0);
   // Constant pointer to array
   static const TypeAryPtr *make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id = 0);
   // Convenience
   static const TypeAryPtr *make(ciObject* o);
   // Return a 'ptr' version of this type
   virtual const Type *cast_to_ptr_type(PTR ptr) const;
   virtual const Type *cast_to_exactness(bool klass_is_exact) const;
   virtual const TypeOopPtr *cast_to_instance(int instance_id) const;
   virtual const TypeAryPtr* cast_to_size(const TypeInt* size) const;
   virtual bool empty(void) const;        // TRUE if type is vacuous
   virtual const TypePtr *add_offset( int offset ) const;
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeAryPtr *RANGE;
   static const TypeAryPtr *OOPS;
   static const TypeAryPtr *BYTES;
   static const TypeAryPtr *SHORTS;
   static const TypeAryPtr *CHARS;
   static const TypeAryPtr *INTS;
   static const TypeAryPtr *LONGS;
   static const TypeAryPtr *FLOATS;
   static const TypeAryPtr *DOUBLES;
   // selects one of the above:
   static const TypeAryPtr *get_array_body_type(BasicType elem) {
     assert((uint)elem <= T_CONFLICT && _array_body_type[elem] != NULL, "bad elem type");
     return _array_body_type[elem];
   }
   static const TypeAryPtr *_array_body_type[T_CONFLICT+1];
   // sharpen the type of an int which is used as an array size
   static const TypeInt* narrow_size_type(const TypeInt* size, BasicType elem);
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
 #endif
 };
 //------------------------------TypeKlassPtr-----------------------------------
 // Class of Java Klass pointers
 class TypeKlassPtr : public TypeOopPtr {
   TypeKlassPtr( PTR ptr, ciKlass* klass, int offset );
   virtual bool eq( const Type *t ) const;
   virtual int hash() const;             // Type specific hashing
 public:
   ciSymbol* name()  const { return _klass->name(); }
   // ptr to klass 'k'
   static const TypeKlassPtr *make( ciKlass* k ) { return make( TypePtr::Constant, k, 0); }
   // ptr to klass 'k' with offset
   static const TypeKlassPtr *make( ciKlass* k, int offset ) { return make( TypePtr::Constant, k, offset); }
   // ptr to klass 'k' or sub-klass
   static const TypeKlassPtr *make( PTR ptr, ciKlass* k, int offset);
   virtual const Type *cast_to_ptr_type(PTR ptr) const;
   virtual const Type *cast_to_exactness(bool klass_is_exact) const;
   // corresponding pointer to instance, for a given class
   const TypeOopPtr* as_instance_type() const;
   virtual const TypePtr *add_offset( int offset ) const;
   virtual const Type    *xmeet( const Type *t ) const;
   virtual const Type    *xdual() const;      // Compute dual right now.
   // Convenience common pre-built types.
   static const TypeKlassPtr* OBJECT; // Not-null object klass or below
   static const TypeKlassPtr* OBJECT_OR_NULL; // Maybe-null version of same
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
 #endif
 };
 //------------------------------TypeFunc---------------------------------------
 // Class of Array Types
 class TypeFunc : public Type {
   TypeFunc( const TypeTuple *domain, const TypeTuple *range ) : Type(Function),  _domain(domain), _range(range) {}
   virtual bool eq( const Type *t ) const;
   virtual int  hash() const;             // Type specific hashing
   virtual bool singleton(void) const;    // TRUE if type is a singleton
   virtual bool empty(void) const;        // TRUE if type is vacuous
 public:
   // Constants are shared among ADLC and VM
   enum { Control    = AdlcVMDeps::Control,
          I_O        = AdlcVMDeps::I_O,
          Memory     = AdlcVMDeps::Memory,
          FramePtr   = AdlcVMDeps::FramePtr,
          ReturnAdr  = AdlcVMDeps::ReturnAdr,
          Parms      = AdlcVMDeps::Parms
   };
   const TypeTuple* const _domain;     // Domain of inputs
   const TypeTuple* const _range;      // Range of results
   // Accessors:
   const TypeTuple* domain() const { return _domain; }
   const TypeTuple* range()  const { return _range; }
   static const TypeFunc *make(ciMethod* method);
   static const TypeFunc *make(ciSignature signature, const Type* extra);
   static const TypeFunc *make(const TypeTuple* domain, const TypeTuple* range);
   virtual const Type *xmeet( const Type *t ) const;
   virtual const Type *xdual() const;    // Compute dual right now.
   BasicType return_type() const;
 #ifndef PRODUCT
   virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
   void print_flattened() const; // Print a 'flattened' signature
 #endif
   // Convenience common pre-built types.
 };
 //------------------------------accessors--------------------------------------
 inline float Type::getf() const {
   assert( _base == FloatCon, "Not a FloatCon" );
   return ((TypeF*)this)->_f;
 }
 inline double Type::getd() const {
   assert( _base == DoubleCon, "Not a DoubleCon" );
   return ((TypeD*)this)->_d;
 }
 inline const TypeF *Type::is_float_constant() const {
   assert( _base == FloatCon, "Not a Float" );
   return (TypeF*)this;
 }
 inline const TypeF *Type::isa_float_constant() const {
   return ( _base == FloatCon ? (TypeF*)this : NULL);
 }
 inline const TypeD *Type::is_double_constant() const {
   assert( _base == DoubleCon, "Not a Double" );
   return (TypeD*)this;
 }
 inline const TypeD *Type::isa_double_constant() const {
   return ( _base == DoubleCon ? (TypeD*)this : NULL);
 }
 inline const TypeInt *Type::is_int() const {
   assert( _base == Int, "Not an Int" );
   return (TypeInt*)this;
 }
 inline const TypeInt *Type::isa_int() const {
   return ( _base == Int ? (TypeInt*)this : NULL);
 }
 inline const TypeLong *Type::is_long() const {
   assert( _base == Long, "Not a Long" );
   return (TypeLong*)this;
 }
 inline const TypeLong *Type::isa_long() const {
   return ( _base == Long ? (TypeLong*)this : NULL);
 }
 inline const TypeTuple *Type::is_tuple() const {
   assert( _base == Tuple, "Not a Tuple" );
   return (TypeTuple*)this;
 }
 inline const TypeAry *Type::is_ary() const {
   assert( _base == Array , "Not an Array" );
   return (TypeAry*)this;
 }
 inline const TypePtr *Type::is_ptr() const {
   // AnyPtr is the first Ptr and KlassPtr the last, with no non-ptrs between.
   assert(_base >= AnyPtr && _base <= KlassPtr, "Not a pointer");
   return (TypePtr*)this;
 }
 inline const TypePtr *Type::isa_ptr() const {
   // AnyPtr is the first Ptr and KlassPtr the last, with no non-ptrs between.
   return (_base >= AnyPtr && _base <= KlassPtr) ? (TypePtr*)this : NULL;
 }
 inline const TypeOopPtr *Type::is_oopptr() const {
   // OopPtr is the first and KlassPtr the last, with no non-oops between.
   assert(_base >= OopPtr && _base <= KlassPtr, "Not a Java pointer" ) ;
   return (TypeOopPtr*)this;
 }
 inline const TypeOopPtr *Type::isa_oopptr() const {
   // OopPtr is the first and KlassPtr the last, with no non-oops between.
   return (_base >= OopPtr && _base <= KlassPtr) ? (TypeOopPtr*)this : NULL;
 }
 inline const TypeRawPtr *Type::is_rawptr() const {
   assert( _base == RawPtr, "Not a raw pointer" );
   return (TypeRawPtr*)this;
 }
 inline const TypeInstPtr *Type::isa_instptr() const {
   return (_base == InstPtr) ? (TypeInstPtr*)this : NULL;
 }
 inline const TypeInstPtr *Type::is_instptr() const {
   assert( _base == InstPtr, "Not an object pointer" );
   return (TypeInstPtr*)this;
 }
 inline const TypeAryPtr *Type::isa_aryptr() const {
   return (_base == AryPtr) ? (TypeAryPtr*)this : NULL;
 }
 inline const TypeAryPtr *Type::is_aryptr() const {
   assert( _base == AryPtr, "Not an array pointer" );
   return (TypeAryPtr*)this;
 }
 inline const TypeKlassPtr *Type::isa_klassptr() const {
   return (_base == KlassPtr) ? (TypeKlassPtr*)this : NULL;
 }
 inline const TypeKlassPtr *Type::is_klassptr() const {
   assert( _base == KlassPtr, "Not a klass pointer" );
   return (TypeKlassPtr*)this;
 }
 inline bool Type::is_floatingpoint() const {
   if( (_base == FloatCon)  || (_base == FloatBot) ||
       (_base == DoubleCon) || (_base == DoubleBot) )
     return true;
   return false;
 }
 // ===============================================================
 // Things that need to be 64-bits in the 64-bit build but
 // 32-bits in the 32-bit build.  Done this way to get full
 // optimization AND strong typing.
 #ifdef _LP64
 // For type queries and asserts
 #define is_intptr_t  is_long
 #define isa_intptr_t isa_long
 #define find_intptr_t_type find_long_type
 #define find_intptr_t_con  find_long_con
 #define TypeX        TypeLong
 #define Type_X       Type::Long
 #define TypeX_X      TypeLong::LONG
 #define TypeX_ZERO   TypeLong::ZERO
 // For 'ideal_reg' machine registers
 #define Op_RegX      Op_RegL
 // For phase->intcon variants
 #define MakeConX     longcon
 #define ConXNode     ConLNode
 // For array index arithmetic
 #define MulXNode     MulLNode
 #define AndXNode     AndLNode
 #define OrXNode      OrLNode
 #define CmpXNode     CmpLNode
 #define SubXNode     SubLNode
 #define LShiftXNode  LShiftLNode
 // For object size computation:
 #define AddXNode     AddLNode
 // For card marks and hashcodes
 #define URShiftXNode URShiftLNode
 // Opcodes
 #define Op_LShiftX   Op_LShiftL
 #define Op_AndX      Op_AndL
 #define Op_AddX      Op_AddL
 #define Op_SubX      Op_SubL
 // conversions
 #define ConvI2X(x)   ConvI2L(x)
 #define ConvL2X(x)   (x)
 #define ConvX2I(x)   ConvL2I(x)
 #define ConvX2L(x)   (x)
 #else
 // For type queries and asserts
 #define is_intptr_t  is_int
 #define isa_intptr_t isa_int
 #define find_intptr_t_type find_int_type
 #define find_intptr_t_con  find_int_con
 #define TypeX        TypeInt
 #define Type_X       Type::Int
 #define TypeX_X      TypeInt::INT
 #define TypeX_ZERO   TypeInt::ZERO
 // For 'ideal_reg' machine registers
 #define Op_RegX      Op_RegI
 // For phase->intcon variants
 #define MakeConX     intcon
 #define ConXNode     ConINode
 // For array index arithmetic
 #define MulXNode     MulINode
 #define AndXNode     AndINode
 #define OrXNode      OrINode
 #define CmpXNode     CmpINode
 #define SubXNode     SubINode
 #define LShiftXNode  LShiftINode
 // For object size computation:
 #define AddXNode     AddINode
 // For card marks and hashcodes
 #define URShiftXNode URShiftINode
 // Opcodes
 #define Op_LShiftX   Op_LShiftI
 #define Op_AndX      Op_AndI
 #define Op_AddX      Op_AddI
 #define Op_SubX      Op_SubI
 // conversions
 #define ConvI2X(x)   (x)
 #define ConvL2X(x)   ConvL2I(x)
 #define ConvX2I(x)   (x)
 #define ConvX2L(x)   ConvI2L(x)
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/type.hpp@a61af66fc99e (annotated)

src/share/vm/opto/type.hpp