/javac_compiler/HotspotSource/JavaHotSpotSrc/src/vm/adlc/forms.cpp

/*

 * Copyright (c) 1997, 2009, 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.

 *

 */



// FORMS.CPP - Definitions for ADL Parser Generic & Utility Forms Classes

#include "adlc.hpp"



//------------------------------Static Initializers----------------------------

// allocate arena used by forms

Arena  *Form::arena = Form::generate_arena(); //  = Form::generate_arena();

Arena *Form::generate_arena() {

  return (new Arena);

}



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

// reserved user-defined string

const char  *NameList::_signal   = "$$SIGNAL$$";

const char  *NameList::_signal2  = "$$SIGNAL2$$";

const char  *NameList::_signal3  = "$$SIGNAL3$$";



// Constructor and Destructor

NameList::NameList() : _cur(0), _max(4), _iter(0), _justReset(true) {

  _names = (const char**)malloc(_max*sizeof(char*));

}

NameList::~NameList() {

  // The following free is a double-free, and crashes the program:

  //free(_names);                   // not owner of strings

}



void   NameList::addName(const char *name) {

  if (_cur == _max) _names =(const char**)realloc(_names,(_max *=2)*sizeof(char*));

  _names[_cur++] = name;

}



void   NameList::add_signal() {

  addName( _signal );

}

void   NameList::clear() {

  _cur   = 0;

  _iter  = 0;

  _justReset = true;

  // _max   = 4; Already allocated

}



int    NameList::count()  const { return _cur; }



void   NameList::reset()   { _iter = 0; _justReset = true;}

const char  *NameList::iter()    {

  if (_justReset) {_justReset=false; return (_iter < _cur ? _names[_iter] : NULL);}

  else return (_iter <_cur-1 ? _names[++_iter] : NULL);

}

const char  *NameList::current() { return (_iter < _cur ? _names[_iter] : NULL); }

const char  *NameList::peek(int skip) { return (_iter + skip < _cur ? _names[_iter + skip] : NULL); }



// Return 'true' if current entry is signal

bool  NameList::current_is_signal() {

  const char *entry = current();

  return is_signal(entry);

}



// Return true if entry is a signal

bool  NameList::is_signal(const char *entry) {

  return ( (strcmp(entry,NameList::_signal) == 0) ? true : false);

}



// Search for a name in the list

bool   NameList::search(const char *name) {

  const char *entry;

  for(reset(); (entry = iter()) != NULL; ) {

    if(!strcmp(entry,name)) return true;

  }

  return false;

}



// Return index of name in list

int    NameList::index(const char *name) {

  int         cnt = 0;

  const char *entry;

  for(reset(); (entry = iter()) != NULL; ) {

    if(!strcmp(entry,name)) return cnt;

    cnt++;

  }

  return Not_in_list;

}



// Return name at index in list

const char  *NameList::name(intptr_t  index) {

  return ( index < _cur ? _names[index] : NULL);

}



void   NameList::dump() { output(stderr); }



void   NameList::output(FILE *fp) {

  fprintf(fp, "\n");



  // Run iteration over all entries, independent of position of iterator.

  const char *name       = NULL;

  int         iter       = 0;

  bool        justReset  = true;



  while( ( name  = (justReset ?

                    (justReset=false, (iter < _cur ? _names[iter] : NULL)) :

                    (iter < _cur-1 ? _names[++iter] : NULL)) )

         != NULL ) {

    fprintf( fp, "  %s,\n", name);

  }

  fprintf(fp, "\n");

}



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

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

NameAndList::NameAndList(char *name) : _name(name) {

}

NameAndList::~NameAndList() {

}



// Add to entries in list

void NameAndList::add_entry(const char *entry) {

  _list.addName(entry);

}



// Access the name and its associated list.

const char *NameAndList::name()  const {  return _name;  }

void        NameAndList::reset()       { _list.reset();  }

const char *NameAndList::iter()        { return _list.iter(); }



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

const char *NameAndList::operator[](int index) {

  assert( index >= 0, "Internal Error(): index less than 0.");



  _list.reset();

  const char *entry = _list.iter();

  // Iterate further if it isn't at index 0.

  for ( int position = 0; position != index; ++position ) {

    entry = _list.iter();

  }



  return entry;

}





void   NameAndList::dump() { output(stderr); }

void   NameAndList::output(FILE *fp) {

  fprintf(fp, "\n");



  // Output the Name

  fprintf(fp, "Name == %s", (_name ? _name : "") );



  // Output the associated list of names

  const char *name;

  fprintf(fp, " (");

  for (reset(); (name = iter()) != NULL;) {

    fprintf(fp, "  %s,\n", name);

  }

  fprintf(fp, ")");

  fprintf(fp, "\n");

}



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

OpClassForm   *Form::is_opclass()     const {

  return NULL;

}



OperandForm   *Form::is_operand()     const {

  return NULL;

}



InstructForm  *Form::is_instruction() const {

  return NULL;

}



MachNodeForm  *Form::is_machnode() const {

  return NULL;

}



AttributeForm *Form::is_attribute() const {

  return NULL;

}



Effect        *Form::is_effect() const {

  return NULL;

}



ResourceForm  *Form::is_resource() const {

  return NULL;

}



PipeClassForm *Form::is_pipeclass() const {

  return NULL;

}



Form::DataType Form::ideal_to_const_type(const char *name) const {

  if( name == NULL ) { return Form::none; }



  if (strcmp(name,"ConI")==0) return Form::idealI;

  if (strcmp(name,"ConP")==0) return Form::idealP;

  if (strcmp(name,"ConN")==0) return Form::idealN;

  if (strcmp(name,"ConL")==0) return Form::idealL;

  if (strcmp(name,"ConF")==0) return Form::idealF;

  if (strcmp(name,"ConD")==0) return Form::idealD;

  if (strcmp(name,"Bool")==0) return Form::idealI;



  return Form::none;

}



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

  if( name == NULL ) { return Form::none; }



  if (strcmp(name,"sRegI")==0) return Form::idealI;

  if (strcmp(name,"sRegP")==0) return Form::idealP;

  if (strcmp(name,"sRegF")==0) return Form::idealF;

  if (strcmp(name,"sRegD")==0) return Form::idealD;

  if (strcmp(name,"sRegL")==0) return Form::idealL;

  return Form::none;

}



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

  if( name == NULL ) { return Form::none; }



  if (strcmp(name,"RegI")==0) return Form::idealI;

  if (strcmp(name,"RegP")==0) return Form::idealP;

  if (strcmp(name,"RegF")==0) return Form::idealF;

  if (strcmp(name,"RegD")==0) return Form::idealD;

  if (strcmp(name,"RegL")==0) return Form::idealL;



  return Form::none;

}



// True if 'opType', an ideal name, loads or stores.

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

  if( strcmp(opType,"LoadB")==0 )  return Form::idealB;

  if( strcmp(opType,"LoadUB")==0 )  return Form::idealB;

  if( strcmp(opType,"LoadUS")==0 )  return Form::idealC;

  if( strcmp(opType,"LoadD")==0 )  return Form::idealD;

  if( strcmp(opType,"LoadD_unaligned")==0 )  return Form::idealD;

  if( strcmp(opType,"LoadF")==0 )  return Form::idealF;

  if( strcmp(opType,"LoadI")==0 )  return Form::idealI;

  if( strcmp(opType,"LoadUI2L")==0 )  return Form::idealI;

  if( strcmp(opType,"LoadKlass")==0 )  return Form::idealP;

  if( strcmp(opType,"LoadNKlass")==0 ) return Form::idealN;

  if( strcmp(opType,"LoadL")==0 )  return Form::idealL;

  if( strcmp(opType,"LoadL_unaligned")==0 )  return Form::idealL;

  if( strcmp(opType,"LoadPLocked")==0 )  return Form::idealP;

  if( strcmp(opType,"LoadLLocked")==0 )  return Form::idealL;

  if( strcmp(opType,"LoadP")==0 )  return Form::idealP;

  if( strcmp(opType,"LoadN")==0 )  return Form::idealN;

  if( strcmp(opType,"LoadRange")==0 )  return Form::idealI;

  if( strcmp(opType,"LoadS")==0 )  return Form::idealS;

  if( strcmp(opType,"Load16B")==0 )  return Form::idealB;

  if( strcmp(opType,"Load8B")==0 )  return Form::idealB;

  if( strcmp(opType,"Load4B")==0 )  return Form::idealB;

  if( strcmp(opType,"Load8C")==0 )  return Form::idealC;

  if( strcmp(opType,"Load4C")==0 )  return Form::idealC;

  if( strcmp(opType,"Load2C")==0 )  return Form::idealC;

  if( strcmp(opType,"Load8S")==0 )  return Form::idealS;

  if( strcmp(opType,"Load4S")==0 )  return Form::idealS;

  if( strcmp(opType,"Load2S")==0 )  return Form::idealS;

  if( strcmp(opType,"Load2D")==0 )  return Form::idealD;

  if( strcmp(opType,"Load4F")==0 )  return Form::idealF;

  if( strcmp(opType,"Load2F")==0 )  return Form::idealF;

  if( strcmp(opType,"Load4I")==0 )  return Form::idealI;

  if( strcmp(opType,"Load2I")==0 )  return Form::idealI;

  if( strcmp(opType,"Load2L")==0 )  return Form::idealL;

  assert( strcmp(opType,"Load") != 0, "Must type Loads" );

  return Form::none;

}



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

  if( strcmp(opType,"StoreB")==0)  return Form::idealB;

  if( strcmp(opType,"StoreCM")==0)  return Form::idealB;

  if( strcmp(opType,"StoreC")==0)  return Form::idealC;

  if( strcmp(opType,"StoreD")==0)  return Form::idealD;

  if( strcmp(opType,"StoreF")==0)  return Form::idealF;

  if( strcmp(opType,"StoreI")==0)  return Form::idealI;

  if( strcmp(opType,"StoreL")==0)  return Form::idealL;

  if( strcmp(opType,"StoreP")==0)  return Form::idealP;

  if( strcmp(opType,"StoreN")==0) return Form::idealN;

  if( strcmp(opType,"Store16B")==0)  return Form::idealB;

  if( strcmp(opType,"Store8B")==0)  return Form::idealB;

  if( strcmp(opType,"Store4B")==0)  return Form::idealB;

  if( strcmp(opType,"Store8C")==0)  return Form::idealC;

  if( strcmp(opType,"Store4C")==0)  return Form::idealC;

  if( strcmp(opType,"Store2C")==0)  return Form::idealC;

  if( strcmp(opType,"Store2D")==0)  return Form::idealD;

  if( strcmp(opType,"Store4F")==0)  return Form::idealF;

  if( strcmp(opType,"Store2F")==0)  return Form::idealF;

  if( strcmp(opType,"Store4I")==0)  return Form::idealI;

  if( strcmp(opType,"Store2I")==0)  return Form::idealI;

  if( strcmp(opType,"Store2L")==0)  return Form::idealL;

  assert( strcmp(opType,"Store") != 0, "Must type Stores" );

  return Form::none;

}



Form::InterfaceType Form::interface_type(FormDict &globals) const {

  return Form::no_interface;

}



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

// Destructor

FormList::~FormList()  {

  // // This list may not own its elements

  // Form *cur  = _root;

  // Form *next = NULL;

  // for( ; (cur = next) != NULL; ) {

  //   next = (Form *)cur->_next;

  //   delete cur;

  // }

};



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

// Constructor

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

  : _form(cmp, hash, arena) {

}

FormDict::~FormDict() {

}



// Return # of name-Form pairs in dict

int FormDict::Size(void) const {

  return _form.Size();

}



// 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  *FormDict::Insert(const char *name, Form *form) {

  return (Form*)_form.Insert((void*)name, (void*)form);

}



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

// The dictionary is NOT changed.

const Form  *FormDict::operator [](const char *name) const {

  return (Form*)_form[name];

}



//------------------------------FormDict::private------------------------------

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

FormDict::FormDict( ) : _form(cmpkey,hashkey) {

  assert( false, "NotImplemented");

}

FormDict::FormDict( const FormDict & fd) : _form(fd._form) {

}

FormDict &FormDict::operator =( const FormDict &rhs) {

  assert( false, "NotImplemented");

  _form = rhs._form;

  return *this;

}

// == 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 FormDict::operator ==(const FormDict &d) const {

  assert( false, "NotImplemented");

  return false;

}



// Print out the dictionary contents as key-value pairs

static void dumpkey (const void* key)  { fprintf(stdout, "%s", (char*) key); }

static void dumpform(const void* form) { fflush(stdout); ((Form*)form)->dump(); }



void FormDict::dump() {

  _form.print(dumpkey, dumpform);

}



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

SourceForm::SourceForm(char* code) : _code(code) { }; // Constructor

SourceForm::~SourceForm() {

}



void SourceForm::dump() {                    // Debug printer

  output(stderr);

}



void SourceForm::output(FILE *fp) {

  fprintf(fp,"\n//%s\n%s\n",classname(),(_code?_code:""));

}