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 /*

  * Copyright (c) 1997, 2013, 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

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 #ifndef SHARE_VM_ADLC_FORMS_HPP

 #define SHARE_VM_ADLC_FORMS_HPP

 // FORMS.HPP - ADL Parser Generic and Utility Forms Classes

 #define TRUE 1

 #define FALSE 0

 // DEFINITIONS OF LEGAL ATTRIBUTE TYPES

 #define INS_ATTR 0

 #define OP_ATTR  1

 // DEFINITIONS OF LEGAL CONSTRAINT TYPES

 // Class List

 class Form;

 class InstructForm;

 class MachNodeForm;

 class OperandForm;

 class OpClassForm;

 class AttributeForm;

 class RegisterForm;

 class PipelineForm;

 class SourceForm;

 class EncodeForm;

 class Component;

 class Constraint;

 class Predicate;

 class MatchRule;

 class Attribute;

 class Effect;

 class ExpandRule;

 class RewriteRule;

 class ConstructRule;

 class FormatRule;

 class Peephole;

 class EncClass;

 class Interface;

 class RegInterface;

 class ConstInterface;

 class MemInterface;

 class CondInterface;

 class Opcode;

 class InsEncode;

 class RegDef;

 class RegClass;

 class AllocClass;

 class ResourceForm;

 class PipeClassForm;

 class PeepMatch;

 class PeepConstraint;

 class PeepReplace;

 class MatchList;

 class ArchDesc;

 //------------------------------FormDict---------------------------------------

 // Dictionary containing Forms, and objects derived from forms

 class FormDict {

 private:

   Dict         _form;              // map names, char*, to their Form* or NULL

   // Disable public use of constructor, copy-ctor, operator =, operator ==

   FormDict( );

   FormDict &operator =( const FormDict & );

   // == compares two dictionaries; they must have the same keys (their keys

   // must match using CmpKey) and they must have the same values (pointer

   // comparison).  If so 1 is returned, if not 0 is returned.

   bool operator ==(const FormDict &d) const; // Compare dictionaries for equal

 public:

   // cmp is a key comparision routine.  hash is a routine to hash a key.

   // FormDict( CmpKey cmp, Hash hash );

   FormDict( CmpKey cmp, Hash hash, Arena *arena );

   FormDict( const FormDict & fd );    // Deep-copy guts

   ~FormDict();

   // Return # of key-value pairs in dict

   int Size(void) const;

   // Insert inserts the given key-value pair into the dictionary.  The prior

   // value of the key is returned; NULL if the key was not previously defined.

   const Form  *Insert(const char *name, Form *form); // A new key-value

   // Find finds the value of a given key; or NULL if not found.

   // The dictionary is NOT changed.

   const Form  *operator [](const char *name) const;  // Do a lookup

   void dump();

 };

 // ***** Master Class for ADL Parser Forms *****

 //------------------------------Form-------------------------------------------

 class Form {

 public:

   static Arena  *arena;            // arena used by forms

 private:

   static Arena  *generate_arena(); // allocate arena used by forms

 protected:

   int   _ftype;                    // Indicator for derived class type

 public:

   // Public Data

   Form *_next;                     // Next pointer for form lists

   int   _linenum;                  // Line number for debugging

   // Dynamic type check for common forms.

   virtual OpClassForm   *is_opclass()     const;

   virtual OperandForm   *is_operand()     const;

   virtual InstructForm  *is_instruction() const;

   virtual MachNodeForm  *is_machnode()    const;

   virtual AttributeForm *is_attribute()   const;

   virtual Effect        *is_effect()      const;

   virtual ResourceForm  *is_resource()    const;

   virtual PipeClassForm *is_pipeclass()   const;

   // Check if this form is an operand usable for cisc-spilling

   virtual bool           is_cisc_reg(FormDict &globals) const { return false; }

   virtual bool           is_cisc_mem(FormDict &globals) const { return false; }

   // Public Methods

   Form(int formType=0, int line=0)

     : _next(NULL), _linenum(line), _ftype(formType) { };

   virtual ~Form() {};

   virtual bool ideal_only() const {

     assert(0,"Check of ideal status on non-instruction/operand form.\n");

     return FALSE;

   }

   // Check constraints after parsing

   virtual bool verify()    { return true; }

   virtual void dump()      { output(stderr); }    // Debug printer

   // Write info to output files

   virtual void output(FILE *fp)    { fprintf(fp,"Form Output"); }

 public:

   // ADLC types, match the last character on ideal operands and instructions

   enum DataType {

     none        =  0,  // Not a simple type

     idealI      =  1,  // Integer type

     idealP      =  2,  // Pointer types, oop(s)

     idealL      =  3,  // Long    type

     idealF      =  4,  // Float   type

     idealD      =  5,  // Double  type

     idealB      =  6,  // Byte    type

     idealC      =  7,  // Char    type

     idealS      =  8,  // String  type

     idealN      =  9,  // Narrow oop types

     idealNKlass = 10,  // Narrow klass types

     idealV      = 11   // Vector  type

   };

   // Convert ideal name to a DataType, return DataType::none if not a 'ConX'

   Form::DataType  ideal_to_const_type(const char *ideal_type_name) const;

   // Convert ideal name to a DataType, return DataType::none if not a 'sRegX

   Form::DataType  ideal_to_sReg_type(const char *name) const;

   // Convert ideal name to a DataType, return DataType::none if not a 'RegX

   Form::DataType  ideal_to_Reg_type(const char *name) const;

   // Convert ideal name to a DataType, return DataType::none if not a 'LoadX

   Form::DataType is_load_from_memory(const char *opType) const;

   // Convert ideal name to a DataType, return DataType::none if not a 'StoreX

   Form::DataType is_store_to_memory(const char *opType)  const;

   // ADLC call types, matched with ideal world

   enum CallType {

     invalid_type  =  0,  // invalid call type

     JAVA_STATIC   =  1,  // monomorphic entry

     JAVA_DYNAMIC  =  2,  // possibly megamorphic, inline cache call

     JAVA_COMPILED =  3,  // callee will be compiled java

     JAVA_INTERP   =  4,  // callee will be executed by interpreter

     JAVA_NATIVE   =  5,  // native entrypoint

     JAVA_RUNTIME  =  6,  // runtime entrypoint

     JAVA_LEAF     =  7   // calling leaf

   };

   // Interface types for operands and operand classes

   enum InterfaceType {

     no_interface          =  0,  // unknown or inconsistent interface type

     constant_interface    =  1,  // interface to constants

     register_interface    =  2,  // interface to registers

     memory_interface      =  3,  // interface to memory

     conditional_interface =  4   // interface for condition codes

   };

   virtual Form::InterfaceType interface_type(FormDict &globals) const;

   enum CiscSpillInfo {

     Not_cisc_spillable   =  AdlcVMDeps::Not_cisc_spillable,

     Maybe_cisc_spillable =   0,

     Is_cisc_spillable    =   1

     // ...

   };

   // LEGAL FORM TYPES

   enum {

     INS,

     OPER,

     OPCLASS,

     SRC,

     ADEF,

     REG,

     PIPE,

     CNST,

     PRED,

     ATTR,

     MAT,

     ENC,

     FOR,

     EXP,

     REW,

     EFF,

     RDEF,

     RCL,

     ACL,

     RES,

     PCL,

     PDEF,

     REGL,

     RESL,

     STAL,

     COMP,

     PEEP,

     RESO

   };

 };

 //------------------------------FormList---------------------------------------

 class FormList {

 private:

   Form *_root;

   Form *_tail;

   Form *_cur;

   int   _justReset;                // Set immediately after reset

   Form *_cur2;                     // Nested iterator

   int   _justReset2;

 public:

   void addForm(Form * entry) {

     if (_tail==NULL) { _root = _tail = _cur = entry;}

     else { _tail->_next = entry; _tail = entry;}

   };

   Form * current() { return _cur; };

   Form * iter()    { if (_justReset) _justReset = 0;

                      else if (_cur)  _cur = _cur->_next;

                      return _cur;};

   void   reset()   { if (_root) {_cur = _root; _justReset = 1;} };

   // Second iterator, state is internal

   Form * current2(){ return _cur2; };

   Form * iter2()   { if (_justReset2) _justReset2 = 0;

                     else if (_cur2)  _cur2 = _cur2->_next;

                     return _cur2;};

   void   reset2()  { if (_root) {_cur2 = _root; _justReset2 = 1;} };

   int  count() {

     int  count = 0; reset();

     for( Form *cur; (cur =  iter()) != NULL; ) { ++count; };

     return count;

   }

   void dump() {

     reset();

     Form *cur;

     for(; (cur =  iter()) != NULL; ) {

       cur->dump();

     };

   }

   bool verify() {

     bool verified = true;

     reset();

     Form *cur;

     for(; (cur =  iter()) != NULL; ) {

       if ( ! cur->verify() ) verified = false;

     };

     return verified;

   }

   void output(FILE* fp) {

     reset();

     Form *cur;

     for( ; (cur =  iter()) != NULL; ) {

       cur->output(fp);

     };

   }

   FormList() { _justReset = 1; _justReset2 = 1; _root = NULL; _tail = NULL; _cur = NULL; _cur2 = NULL;};

   ~FormList();

 };

 //------------------------------NameList---------------------------------------

 // Extendable list of pointers, <char *>

 class NameList {

   friend class PreserveIter;

 private:

   int                _cur;         // Insert next entry here; count of entries

   int                _max;         // Number of spaces allocated

   const char       **_names;       // Array of names

 protected:

   int                _iter;        // position during iteration

   bool               _justReset;   // Set immediately after reset

 public:

   static const char *_signal;      // reserved user-defined string

   static const char *_signal2;      // reserved user-defined string

   static const char *_signal3;      // reserved user-defined string

   enum               { Not_in_list = -1 };

   void  addName(const char *name);

   void  add_signal();

   void  clear();                   // Remove all entries

   int   count() const;

   void  reset();                   // Reset iteration

   const char *iter();              // after reset(), first element : else next

   const char *current();           // return current element in iteration.

   const char *peek(int skip = 1);  // returns element + skip in iteration if there is one

   bool  current_is_signal();       // Return 'true' if current entry is signal

   bool  is_signal(const char *entry); // Return true if entry is a signal

   bool  search(const char *);      // Search for a name in the list

   int   index(const char *);       // Return index of name in list

   const char *name (intptr_t index);// Return name at index in list

   void  dump();                    // output to stderr

   void  output(FILE *fp);          // Output list of names to 'fp'

   NameList();

   ~NameList();

 };

 // Convenience class to preserve iteration state since iterators are

 // internal instead of being external.

 class PreserveIter {

  private:

   NameList* _list;

   int _iter;

   bool _justReset;

  public:

   PreserveIter(NameList* nl) {

     _list = nl;

     _iter = _list->_iter;

     _justReset = _list->_justReset;

   }

   ~PreserveIter() {

     _list->_iter = _iter;

     _list->_justReset = _justReset;

   }

 };

 //------------------------------NameAndList------------------------------------

 // Storage for a name and an associated list of names

 class NameAndList {

 private:

   const char *_name;

   NameList    _list;

 public:

   NameAndList(char *name);

   ~NameAndList();

   // Add to entries in list

   void        add_entry(const char *entry);

   // Access the name and its associated list.

   const char *name() const;

   void        reset();

   const char *iter();

   int count() { return _list.count(); }

   // Return the "index" entry in the list, zero-based

   const char *operator[](int index);

   void  dump();                    // output to stderr

   void  output(FILE *fp);          // Output list of names to 'fp'

 };

 //------------------------------ComponentList---------------------------------

 // Component lists always have match rule operands first, followed by parameter

 // operands which do not appear in the match list (in order of declaration).

 class ComponentList : private NameList {

 private:

   int   _matchcnt;                 // Count of match rule operands

 public:

   // This is a batch program.  (And I have a destructor bug!)

   void operator delete( void *ptr ) {}

   void insert(Component *component, bool mflag);

   void insert(const char *name, const char *opType, int usedef, bool mflag);

   int  count();

   int  match_count() { return _matchcnt; } // Get count of match rule opers

   Component *iter();               // after reset(), first element : else next

   Component *match_iter();         // after reset(), first element : else next

   Component *post_match_iter();    // after reset(), first element : else next

   void       reset();              // Reset iteration

   Component *current();            // return current element in iteration.

   // Return element at "position", else NULL

   Component *operator[](int position);

   Component *at(int position) { return (*this)[position]; }

   // Return first component having this name.

   const Component *search(const char *name);

   // Return number of USEs + number of DEFs

   int        num_operands();

   // Return zero-based position in list;  -1 if not in list.

   int        operand_position(const char *name, int usedef, Form *fm);

   // Find position for this name, regardless of use/def information

   int        operand_position(const char *name);

   // Find position for this name when looked up for output via "format"

   int        operand_position_format(const char *name, Form *fm);

   // Find position for the Label when looked up for output via "format"

   int        label_position();

   // Find position for the Method when looked up for output via "format"

   int        method_position();

   void       dump();               // output to stderr

   void       output(FILE *fp);     // Output list of names to 'fp'

   ComponentList();

   ~ComponentList();

 };

 //------------------------------SourceForm-------------------------------------

 class SourceForm : public Form {

 private:

 public:

   // Public Data

   char *_code;                     // Buffer for storing code text

   // Public Methods

   SourceForm(char* code);

   ~SourceForm();

   virtual const char* classname() { return "SourceForm"; }

   void dump();                    // Debug printer

   void output(FILE *fp);          // Write output files

 };

 class HeaderForm : public SourceForm {

 public:

   HeaderForm(char* code) : SourceForm(code) { }

   virtual const char* classname() { return "HeaderForm"; }

 };

 class PreHeaderForm : public SourceForm {

 public:

   PreHeaderForm(char* code) : SourceForm(code) { }

   virtual const char* classname() { return "PreHeaderForm"; }

 };

 //------------------------------Expr------------------------------------------

 #define STRING_BUFFER_LENGTH  2048

 // class Expr represents integer expressions containing constants and addition

 // Value must be in range zero through maximum positive integer. 32bits.

 // Expected use: instruction and operand costs

 class Expr {

 public:

   enum {

     Zero     = 0,

     Max      = 0x7fffffff

   };

   const char *_external_name;  // if !NULL, then print this instead of _expr

   const char *_expr;

   int         _min_value;

   int         _max_value;

   Expr();

   Expr(const char *cost);

   Expr(const char *name, const char *expression, int min_value, int max_value);

   Expr *clone() const;

   bool  is_unknown() const { return (this == Expr::get_unknown()); }

   bool  is_zero()    const { return (_min_value == Expr::Zero && _max_value == Expr::Zero); }

   bool  less_than_or_equal(const Expr *c) const { return (_max_value <= c->_min_value); }

   void  add(const Expr *c);

   void  add(const char *c);

   void  add(const char *c, ArchDesc &AD);   // check if 'c' is defined in <arch>.ad

   void  set_external_name(const char *name) { _external_name = name; }

   const char *as_string()  const { return (_external_name != NULL ? _external_name : _expr); }

   void  print()            const;

   void  print_define(FILE *fp) const;

   void  print_assert(FILE *fp) const;

   static Expr *get_unknown();   // Returns pointer to shared unknown cost instance

   static char *buffer()         { return &external_buffer[0]; }

   static bool  init_buffers();  // Fill buffers with 0

   static bool  check_buffers(); // if buffer use may have overflowed, assert

 private:

   static Expr *_unknown_expr;

   static char string_buffer[STRING_BUFFER_LENGTH];

   static char external_buffer[STRING_BUFFER_LENGTH];

   static bool _init_buffers;

   const char *compute_expr(const Expr *c1, const Expr *c2);  // cost as string after adding 'c1' and 'c2'

   int         compute_min (const Expr *c1, const Expr *c2);  // minimum after adding 'c1' and 'c2'

   int         compute_max (const Expr *c1, const Expr *c2);  // maximum after adding 'c1' and 'c2'

   const char *compute_external(const Expr *c1, const Expr *c2);  // external name after adding 'c1' and 'c2'

 };

 //------------------------------ExprDict---------------------------------------

 // Dictionary containing Exprs

 class ExprDict {

 private:

   Dict         _expr;              // map names, char*, to their Expr* or NULL

   NameList     _defines;           // record the order of definitions entered with define call

   // Disable public use of constructor, copy-ctor, operator =, operator ==

   ExprDict( );

   ExprDict( const ExprDict & );    // Deep-copy guts

   ExprDict &operator =( const ExprDict & );

   // == compares two dictionaries; they must have the same keys (their keys

   // must match using CmpKey) and they must have the same values (pointer

   // comparison).  If so 1 is returned, if not 0 is returned.

   bool operator ==(const ExprDict &d) const; // Compare dictionaries for equal

 public:

   // cmp is a key comparision routine.  hash is a routine to hash a key.

   ExprDict( CmpKey cmp, Hash hash, Arena *arena );

   ~ExprDict();

   // Return # of key-value pairs in dict

   int Size(void) const;

   // define inserts the given key-value pair into the dictionary,

   // and records the name in order for later output, ...

   const Expr  *define(const char *name, Expr *expr);

   // Insert inserts the given key-value pair into the dictionary.  The prior

   // value of the key is returned; NULL if the key was not previously defined.

   const Expr  *Insert(const char *name, Expr *expr); // A new key-value

   // Find finds the value of a given key; or NULL if not found.

   // The dictionary is NOT changed.

   const Expr  *operator [](const char *name) const;  // Do a lookup

   void print_defines(FILE *fp);

   void print_asserts(FILE *fp);

   void dump();

 };

 #endif // SHARE_VM_ADLC_FORMS_HPP