[thirdparty/gcc.git] / gcc / java / constants.c

/* Handle the constant pool of the Java(TM) Virtual Machine.
   Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. 

Java and all Java-based marks are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries.
The Free Software Foundation is independent of Sun Microsystems, Inc.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "jcf.h"
#include "tree.h"
#include "java-tree.h"
#include "toplev.h"
#include "ggc.h"

static void set_constant_entry PARAMS ((CPool *, int, int, jword));
static int find_class_or_string_constant PARAMS ((CPool *, int, tree));
static int find_name_and_type_constant PARAMS ((CPool *, tree, tree));
static tree get_tag_node PARAMS ((int));
static tree build_constant_data_ref PARAMS ((void));

/* Set the INDEX'th constant in CPOOL to have the given TAG and VALUE. */

static void
set_constant_entry (cpool, index, tag, value)
     CPool *cpool;
     int index;
     int tag;
     jword value;
{
  if (cpool->data == NULL)
    {
      cpool->capacity = 100;
      cpool->tags = xmalloc (sizeof(uint8) * cpool->capacity);
      cpool->data = xmalloc (sizeof(jword) * cpool->capacity);
      cpool->count = 1;
    }
  if (index >= cpool->capacity)
    {
      cpool->capacity *= 2;
      if (index >= cpool->capacity)
	cpool->capacity = index + 10;
      cpool->tags = xrealloc (cpool->tags, sizeof(uint8) * cpool->capacity);
      cpool->data = xrealloc (cpool->data, sizeof(jword) * cpool->capacity);
    }
  if (index >= cpool->count)
    cpool->count = index + 1;
  cpool->tags[index] = tag;
  cpool->data[index] = value;
}

/* Find (or create) a constant pool entry matching TAG and VALUE. */

int
find_constant1 (cpool, tag, value)
     CPool *cpool;
     int tag;
     jword value;
{
  int i;
  for (i = cpool->count;  --i > 0; )
    {
      if (cpool->tags[i] == tag && cpool->data[i] == value)
	return i;
    }
  i = cpool->count == 0 ? 1 : cpool->count;
  set_constant_entry (cpool, i, tag, value);
  return i;
}

/* Find a double-word constant pool entry matching TAG and WORD1/WORD2. */

int
find_constant2 (cpool, tag, word1, word2)
     CPool *cpool;
     int tag;
     jword word1, word2;
{
  int i;
  for (i = cpool->count - 1;  --i > 0; )
    {
      if (cpool->tags[i] == tag
	  && cpool->data[i] == word1
	  && cpool->data[i+1] == word2)
	return i;
    }
  i = cpool->count == 0 ? 1 : cpool->count;
  set_constant_entry (cpool, i, tag, word1);
  set_constant_entry (cpool, i+1, 0, word2);
  return i;
}

int
find_utf8_constant (cpool, name)
     CPool *cpool;
     tree name;
{
  if (name == NULL_TREE)
    return 0;
  return find_constant1 (cpool, CONSTANT_Utf8, (jword) name);
}

static int
find_class_or_string_constant (cpool, tag, name)
     CPool *cpool;
     int tag;
     tree name;
{
  int j = find_utf8_constant (cpool, name);
  int i;
  for (i = cpool->count;  --i > 0; )
    {
      if (cpool->tags[i] == tag && cpool->data[i] == (jword) j)
	return i;
    }
  i = cpool->count;
  set_constant_entry (cpool, i, tag, (jword) j);
  return i;
}

int
find_class_constant (cpool, type)
     CPool *cpool;
     tree type;
{
  return find_class_or_string_constant (cpool, CONSTANT_Class,
					build_internal_class_name (type));
}

/* Allocate a CONSTANT_string entry given a STRING_CST. */

int
find_string_constant (cpool, string)
     CPool *cpool;
     tree string;
{
  string = get_identifier (TREE_STRING_POINTER (string));
  return find_class_or_string_constant (cpool, CONSTANT_String, string);

}

/* Find (or create) a CONSTANT_NameAndType matching NAME and TYPE.
   Return its index in the constant pool CPOOL. */

static int
find_name_and_type_constant (cpool, name, type)
     CPool *cpool;
     tree name;
     tree type;
{
  int name_index = find_utf8_constant (cpool, name);
  int type_index = find_utf8_constant (cpool, build_java_signature (type));
  return find_constant1 (cpool, CONSTANT_NameAndType,
			 (name_index << 16) | type_index);
}

/* Find (or create) a CONSTANT_Fieldref for DECL (a FIELD_DECL or VAR_DECL).
   Return its index in the constant pool CPOOL. */

int
find_fieldref_index (cpool, decl)
     CPool *cpool;
     tree decl;
{
  int class_index = find_class_constant (cpool, DECL_CONTEXT (decl));
  int name_type_index
    = find_name_and_type_constant (cpool, DECL_NAME (decl), TREE_TYPE (decl));
  return find_constant1 (cpool, CONSTANT_Fieldref,
			 (class_index << 16) | name_type_index);
}

/* Find (or create) a CONSTANT_Methodref for DECL (a FUNCTION_DECL).
   Return its index in the constant pool CPOOL. */

int
find_methodref_index (cpool, decl)
     CPool *cpool;
     tree decl;
{
  return find_methodref_with_class_index (cpool, decl, DECL_CONTEXT (decl));
}

int
find_methodref_with_class_index (cpool, decl, mclass)
     CPool *cpool;
     tree decl;
     tree mclass;
{
  int class_index = find_class_constant (cpool, mclass);
  tree name = DECL_CONSTRUCTOR_P (decl) ? init_identifier_node
    : DECL_NAME (decl);
  int name_type_index;
  name_type_index = 
      find_name_and_type_constant (cpool, name, TREE_TYPE (decl));
  return find_constant1 (cpool,
			 CLASS_INTERFACE (TYPE_NAME (mclass))
			 ? CONSTANT_InterfaceMethodref
			 : CONSTANT_Methodref,
			 (class_index << 16) | name_type_index);
}

#define PUT1(X)  (*ptr++ = (X))
#define PUT2(X)  (PUT1((X) >> 8), PUT1(X))
#define PUT4(X)  (PUT2((X) >> 16), PUT2(X))
#define PUTN(P, N)  (memcpy(ptr, (P), (N)), ptr += (N))

/* Give the number of bytes needed in a .class file for the CPOOL
   constant pool.  Includes the 2-byte constant_pool_count. */

int
count_constant_pool_bytes (cpool)
     CPool *cpool;
{
  int size = 2;
  int i = 1;
  for ( ;  i < cpool->count;  i++)
    {
      size++;
      switch (cpool->tags[i])
	{
	case CONSTANT_NameAndType:
	case CONSTANT_Fieldref:
	case CONSTANT_Methodref:
	case CONSTANT_InterfaceMethodref:
	case CONSTANT_Float:
	case CONSTANT_Integer:
	  size += 4;
	  break;
	case CONSTANT_Class:
	case CONSTANT_String:
	  size += 2;
	  break;
	case CONSTANT_Long:
	case CONSTANT_Double:
	  size += 8;
	  i++;
	  break;
	case CONSTANT_Utf8:
	  {
	    tree t = (tree) cpool->data[i];
	    int len = IDENTIFIER_LENGTH (t);
	    size += len + 2;
	  }
	  break;
	default:
	  /* Second word of CONSTANT_Long and  CONSTANT_Double. */
	  size--;
	}
    }
  return size;
}

/* Write the constant pool CPOOL into BUFFER.
   The length of BUFFER is LENGTH, which must match the needed length. */

void
write_constant_pool (cpool, buffer, length)
     CPool *cpool;
     unsigned char *buffer;
     int length;
{
  unsigned char *ptr = buffer;
  int i = 1;
  jword *datap = &cpool->data[1];
  PUT2 (cpool->count);
  for ( ;  i < cpool->count;  i++, datap++)
    {
      int tag = cpool->tags[i];
      PUT1 (tag);
      switch (tag)
	{
	case CONSTANT_NameAndType:
	case CONSTANT_Fieldref:
	case CONSTANT_Methodref:
	case CONSTANT_InterfaceMethodref:
	case CONSTANT_Float:
	case CONSTANT_Integer:
	  PUT4 (*datap);
	  break;
	case CONSTANT_Class:
	case CONSTANT_String:
	  PUT2 (*datap);
	  break;
	  break;
	case CONSTANT_Long:
	case CONSTANT_Double:
	  PUT4(*datap);
	  i++;
	  datap++;
	  PUT4 (*datap);
	  break;
	case CONSTANT_Utf8:
	  {
	    tree t = (tree) *datap;
	    int len = IDENTIFIER_LENGTH (t);
	    PUT2 (len);
	    PUTN (IDENTIFIER_POINTER (t), len);
	  }
	  break;
	}
    }

  if (ptr != buffer + length)
    abort ();
}

CPool *outgoing_cpool;

static GTY(()) tree tag_nodes[13];
static tree
get_tag_node (tag)
     int tag;
{
  /* A Cache for build_int_2 (CONSTANT_XXX, 0). */

  if (tag_nodes[tag] == NULL_TREE)
    tag_nodes[tag] = build_int_2 (tag, 0);
  return tag_nodes[tag];
}

/* Look for a constant pool entry that matches TAG and NAME.
   Creates a new entry if not found.
   TAG is one of CONSTANT_Utf8, CONSTANT_String or CONSTANT_Class.
   NAME is an IDENTIFIER_NODE naming the Utf8 constant, string, or class.
   Returns the index of the entry. */

int
alloc_name_constant (tag, name)
     int tag;
     tree name;
{
  return find_constant1 (outgoing_cpool, tag, (jword) name);
}

/* Build an identifier for the internal name of reference type TYPE. */

tree
build_internal_class_name (type)
     tree type;
{
  tree name;
  if (TYPE_ARRAY_P (type))
    name = build_java_signature (type);
  else
    {
      name = TYPE_NAME (type);
      if (TREE_CODE (name) != IDENTIFIER_NODE)
	name = DECL_NAME (name);
      name = identifier_subst (name, "", '.', '/', "");
    }
  return name;
}

/* Look for a CONSTANT_Class entry for CLAS, creating a new one if needed. */

int
alloc_class_constant (clas)
     tree clas;
{
  tree class_name = build_internal_class_name (clas);
  
  return alloc_name_constant (CONSTANT_Class,
			      (unmangle_classname 
			       (IDENTIFIER_POINTER(class_name),
				IDENTIFIER_LENGTH(class_name))));
}

/* Return a reference to the data array of the current constant pool. */

static tree
build_constant_data_ref ()
{
  tree cpool_data_ref = NULL_TREE;

  if (TYPE_CPOOL_DATA_REF (current_class))
    cpool_data_ref = TYPE_CPOOL_DATA_REF (current_class);

  if (cpool_data_ref == NULL_TREE)
    {
      tree decl;
      tree decl_name = mangled_classname ("_CD_", current_class);
      decl = build_decl (VAR_DECL, decl_name,
			 build_array_type (ptr_type_node,
					   one_elt_array_domain_type));
      TREE_STATIC (decl) = 1;
      make_decl_rtl (decl, NULL);
      TYPE_CPOOL_DATA_REF (current_class) = cpool_data_ref
	= build1 (ADDR_EXPR, ptr_type_node, decl);
    }
  return cpool_data_ref;
}

/* Get the pointer value at the INDEX'th element of the constant pool. */

tree
build_ref_from_constant_pool (index)
     int index;
{
  tree t = build_constant_data_ref ();
  index *= int_size_in_bytes (ptr_type_node);
  t = fold (build (PLUS_EXPR, ptr_type_node,
                              t, build_int_2 (index, 0)));
  return build1 (INDIRECT_REF, ptr_type_node, t);
}

/* Build an initializer for the constants field of the current constal pool.
   Should only be called at top-level, since it may emit declarations. */

tree
build_constants_constructor ()
{
  tree tags_value, data_value;
  tree cons;
  tree tags_list = NULL_TREE;
  tree data_list = NULL_TREE;
  int i;
  for (i = outgoing_cpool->count;  --i > 0; )
    {
      tags_list
	= tree_cons (NULL_TREE, get_tag_node (outgoing_cpool->tags[i]),
		     tags_list);
      data_list
	= tree_cons (NULL_TREE, build_utf8_ref ((tree)outgoing_cpool->data[i]),
		     data_list);
    }
  if (outgoing_cpool->count > 0)
    {
      tree index_type;
      tree data_decl, tags_decl, tags_type;
      tree max_index = build_int_2 (outgoing_cpool->count - 1, 0);
      TREE_TYPE (max_index) = sizetype;
      index_type = build_index_type (max_index);

      /* Add dummy 0'th element of constant pool. */
      tags_list = tree_cons (NULL_TREE, get_tag_node (0), tags_list);
      data_list = tree_cons (NULL_TREE, null_pointer_node, data_list);
  
      data_decl = TREE_OPERAND (build_constant_data_ref (), 0);
      TREE_TYPE (data_decl) = build_array_type (ptr_type_node, index_type), 
      DECL_INITIAL (data_decl) = build (CONSTRUCTOR, TREE_TYPE (data_decl),
					NULL_TREE, data_list);
      DECL_SIZE (data_decl) = TYPE_SIZE (TREE_TYPE (data_decl));
      DECL_SIZE_UNIT (data_decl) = TYPE_SIZE_UNIT (TREE_TYPE (data_decl));
      rest_of_decl_compilation (data_decl, (char *) 0, 1, 0);
      data_value = build_address_of (data_decl);

      tags_type = build_array_type (unsigned_byte_type_node, index_type);
      tags_decl = build_decl (VAR_DECL, mangled_classname ("_CT_", 
							   current_class),
			      tags_type);
      TREE_STATIC (tags_decl) = 1;
      DECL_INITIAL (tags_decl) = build (CONSTRUCTOR, tags_type,
					NULL_TREE, tags_list);
      rest_of_decl_compilation (tags_decl, (char*) 0, 1, 0);
      tags_value = build_address_of (tags_decl);
    }
  else
    {
      data_value = null_pointer_node;
      tags_value = null_pointer_node;
    }
  START_RECORD_CONSTRUCTOR (cons, constants_type_node);
  PUSH_FIELD_VALUE (cons, "size", build_int_2 (outgoing_cpool->count, 0));
  PUSH_FIELD_VALUE (cons, "tags", tags_value);
  PUSH_FIELD_VALUE (cons, "data", data_value);
  FINISH_RECORD_CONSTRUCTOR (cons);
  return cons;
}

#include "gt-java-constants.h"
Commit	Line	Data
e04a16fb	1	/* Handle the constant pool of the Java(TM) Virtual Machine.
6c418184	2	Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
e04a16fb AG	3
	4	This file is part of GNU CC.
	5
	6	GNU CC is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
	10
	11	GNU CC is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15	You should have received a copy of the GNU General Public License
	16	along with GNU CC; see the file COPYING. If not, write to
	17	the Free Software Foundation, 59 Temple Place - Suite 330,
	18	Boston, MA 02111-1307, USA.
	19
	20	Java and all Java-based marks are trademarks or registered trademarks
	21	of Sun Microsystems, Inc. in the United States and other countries.
	22	The Free Software Foundation is independent of Sun Microsystems, Inc. */
	23
	24	#include "config.h"
1f43f4b4	25	#include "system.h"
4977bab6 ZW	26	#include "coretypes.h"
4977bab6 ZW	27	#include "tm.h"
4bcde32e	28	#include "jcf.h"
e04a16fb AG	29	#include "tree.h"
e04a16fb AG	30	#include "java-tree.h"
1f43f4b4	31	#include "toplev.h"
19e223db	32	#include "ggc.h"
e04a16fb	33
df32d2ce KG	34	static void set_constant_entry PARAMS ((CPool *, int, int, jword));
	35	static int find_class_or_string_constant PARAMS ((CPool *, int, tree));
	36	static int find_name_and_type_constant PARAMS ((CPool *, tree, tree));
	37	static tree get_tag_node PARAMS ((int));
	38	static tree build_constant_data_ref PARAMS ((void));
4bcde32e	39
e04a16fb AG	40	/* Set the INDEX'th constant in CPOOL to have the given TAG and VALUE. */
e04a16fb AG	41
4bcde32e	42	static void
e04a16fb AG	43	set_constant_entry (cpool, index, tag, value)
	44	CPool *cpool;
	45	int index;
	46	int tag;
	47	jword value;
	48	{
	49	if (cpool->data == NULL)
	50	{
	51	cpool->capacity = 100;
a92cb0c3 JMH	52	cpool->tags = xmalloc (sizeof(uint8) * cpool->capacity);
a92cb0c3 JMH	53	cpool->data = xmalloc (sizeof(jword) * cpool->capacity);
e04a16fb AG	54	cpool->count = 1;
	55	}
	56	if (index >= cpool->capacity)
	57	{
	58	cpool->capacity *= 2;
	59	if (index >= cpool->capacity)
	60	cpool->capacity = index + 10;
a92cb0c3 JMH	61	cpool->tags = xrealloc (cpool->tags, sizeof(uint8) * cpool->capacity);
a92cb0c3 JMH	62	cpool->data = xrealloc (cpool->data, sizeof(jword) * cpool->capacity);
e04a16fb AG	63	}
	64	if (index >= cpool->count)
	65	cpool->count = index + 1;
	66	cpool->tags[index] = tag;
	67	cpool->data[index] = value;
	68	}
	69
	70	/* Find (or create) a constant pool entry matching TAG and VALUE. */
	71
	72	int
	73	find_constant1 (cpool, tag, value)
	74	CPool *cpool;
	75	int tag;
	76	jword value;
	77	{
	78	int i;
	79	for (i = cpool->count; --i > 0; )
	80	{
	81	if (cpool->tags[i] == tag && cpool->data[i] == value)
	82	return i;
	83	}
	84	i = cpool->count == 0 ? 1 : cpool->count;
	85	set_constant_entry (cpool, i, tag, value);
	86	return i;
	87	}
	88
	89	/* Find a double-word constant pool entry matching TAG and WORD1/WORD2. */
	90
	91	int
	92	find_constant2 (cpool, tag, word1, word2)
	93	CPool *cpool;
	94	int tag;
	95	jword word1, word2;
	96	{
	97	int i;
	98	for (i = cpool->count - 1; --i > 0; )
	99	{
	100	if (cpool->tags[i] == tag
	101	&& cpool->data[i] == word1
	102	&& cpool->data[i+1] == word2)
	103	return i;
	104	}
	105	i = cpool->count == 0 ? 1 : cpool->count;
	106	set_constant_entry (cpool, i, tag, word1);
	107	set_constant_entry (cpool, i+1, 0, word2);
	108	return i;
	109	}
	110
	111	int
	112	find_utf8_constant (cpool, name)
	113	CPool *cpool;
	114	tree name;
	115	{
	116	if (name == NULL_TREE)
	117	return 0;
	118	return find_constant1 (cpool, CONSTANT_Utf8, (jword) name);
	119	}
	120
4bcde32e	121	static int
e04a16fb AG	122	find_class_or_string_constant (cpool, tag, name)
	123	CPool *cpool;
	124	int tag;
	125	tree name;
	126	{
	127	int j = find_utf8_constant (cpool, name);
	128	int i;
	129	for (i = cpool->count; --i > 0; )
	130	{
7e21fe59	131	if (cpool->tags[i] == tag && cpool->data[i] == (jword) j)
e04a16fb AG	132	return i;
	133	}
	134	i = cpool->count;
	135	set_constant_entry (cpool, i, tag, (jword) j);
	136	return i;
	137	}
	138
	139	int
	140	find_class_constant (cpool, type)
	141	CPool *cpool;
	142	tree type;
	143	{
	144	return find_class_or_string_constant (cpool, CONSTANT_Class,
	145	build_internal_class_name (type));
	146	}
	147
d640220c PB	148	/* Allocate a CONSTANT_string entry given a STRING_CST. */
	149
	150	int
	151	find_string_constant (cpool, string)
	152	CPool *cpool;
	153	tree string;
	154	{
	155	string = get_identifier (TREE_STRING_POINTER (string));
	156	return find_class_or_string_constant (cpool, CONSTANT_String, string);
	157
	158	}
	159
e04a16fb AG	160	/* Find (or create) a CONSTANT_NameAndType matching NAME and TYPE.
	161	Return its index in the constant pool CPOOL. */
	162
4bcde32e	163	static int
e04a16fb AG	164	find_name_and_type_constant (cpool, name, type)
	165	CPool *cpool;
	166	tree name;
	167	tree type;
	168	{
	169	int name_index = find_utf8_constant (cpool, name);
	170	int type_index = find_utf8_constant (cpool, build_java_signature (type));
	171	return find_constant1 (cpool, CONSTANT_NameAndType,
	172	(name_index << 16) \| type_index);
	173	}
	174
	175	/* Find (or create) a CONSTANT_Fieldref for DECL (a FIELD_DECL or VAR_DECL).
	176	Return its index in the constant pool CPOOL. */
	177
	178	int
	179	find_fieldref_index (cpool, decl)
	180	CPool *cpool;
	181	tree decl;
	182	{
	183	int class_index = find_class_constant (cpool, DECL_CONTEXT (decl));
	184	int name_type_index
	185	= find_name_and_type_constant (cpool, DECL_NAME (decl), TREE_TYPE (decl));
	186	return find_constant1 (cpool, CONSTANT_Fieldref,
	187	(class_index << 16) \| name_type_index);
	188	}
	189
	190	/* Find (or create) a CONSTANT_Methodref for DECL (a FUNCTION_DECL).
	191	Return its index in the constant pool CPOOL. */
	192
	193	int
	194	find_methodref_index (cpool, decl)
	195	CPool *cpool;
	196	tree decl;
	197	{
8789b9fa PB	198	return find_methodref_with_class_index (cpool, decl, DECL_CONTEXT (decl));
	199	}
	200
	201	int
	202	find_methodref_with_class_index (cpool, decl, mclass)
	203	CPool *cpool;
	204	tree decl;
	205	tree mclass;
	206	{
72a0aac6	207	int class_index = find_class_constant (cpool, mclass);
e04a16fb AG	208	tree name = DECL_CONSTRUCTOR_P (decl) ? init_identifier_node
e04a16fb AG	209	: DECL_NAME (decl);
48aedbca	210	int name_type_index;
48aedbca AG	211	name_type_index =
48aedbca AG	212	find_name_and_type_constant (cpool, name, TREE_TYPE (decl));
72a0aac6 PB	213	return find_constant1 (cpool,
	214	CLASS_INTERFACE (TYPE_NAME (mclass))
	215	? CONSTANT_InterfaceMethodref
	216	: CONSTANT_Methodref,
e04a16fb AG	217	(class_index << 16) \| name_type_index);
	218	}
	219
	220	#define PUT1(X) (*ptr++ = (X))
	221	#define PUT2(X) (PUT1((X) >> 8), PUT1(X))
	222	#define PUT4(X) (PUT2((X) >> 16), PUT2(X))
cb9b7a8c	223	#define PUTN(P, N) (memcpy(ptr, (P), (N)), ptr += (N))
e04a16fb AG	224
	225	/* Give the number of bytes needed in a .class file for the CPOOL
	226	constant pool. Includes the 2-byte constant_pool_count. */
	227
	228	int
	229	count_constant_pool_bytes (cpool)
	230	CPool *cpool;
	231	{
	232	int size = 2;
	233	int i = 1;
d640220c	234	for ( ; i < cpool->count; i++)
e04a16fb AG	235	{
	236	size++;
	237	switch (cpool->tags[i])
	238	{
	239	case CONSTANT_NameAndType:
	240	case CONSTANT_Fieldref:
	241	case CONSTANT_Methodref:
	242	case CONSTANT_InterfaceMethodref:
	243	case CONSTANT_Float:
	244	case CONSTANT_Integer:
	245	size += 4;
	246	break;
	247	case CONSTANT_Class:
	248	case CONSTANT_String:
	249	size += 2;
	250	break;
	251	case CONSTANT_Long:
	252	case CONSTANT_Double:
d640220c PB	253	size += 8;
d640220c PB	254	i++;
e04a16fb AG	255	break;
	256	case CONSTANT_Utf8:
	257	{
d640220c	258	tree t = (tree) cpool->data[i];
e04a16fb AG	259	int len = IDENTIFIER_LENGTH (t);
	260	size += len + 2;
	261	}
	262	break;
d640220c PB	263	default:
	264	/* Second word of CONSTANT_Long and CONSTANT_Double. */
	265	size--;
e04a16fb AG	266	}
	267	}
	268	return size;
	269	}
	270
	271	/* Write the constant pool CPOOL into BUFFER.
	272	The length of BUFFER is LENGTH, which must match the needed length. */
	273
	274	void
	275	write_constant_pool (cpool, buffer, length)
	276	CPool *cpool;
400500c4	277	unsigned char *buffer;
e04a16fb AG	278	int length;
e04a16fb AG	279	{
400500c4	280	unsigned char *ptr = buffer;
e04a16fb AG	281	int i = 1;
	282	jword *datap = &cpool->data[1];
	283	PUT2 (cpool->count);
	284	for ( ; i < cpool->count; i++, datap++)
	285	{
	286	int tag = cpool->tags[i];
	287	PUT1 (tag);
	288	switch (tag)
	289	{
	290	case CONSTANT_NameAndType:
	291	case CONSTANT_Fieldref:
	292	case CONSTANT_Methodref:
	293	case CONSTANT_InterfaceMethodref:
	294	case CONSTANT_Float:
	295	case CONSTANT_Integer:
	296	PUT4 (*datap);
	297	break;
	298	case CONSTANT_Class:
	299	case CONSTANT_String:
	300	PUT2 (*datap);
	301	break;
	302	break;
	303	case CONSTANT_Long:
	304	case CONSTANT_Double:
	305	PUT4(*datap);
	306	i++;
	307	datap++;
	308	PUT4 (*datap);
	309	break;
	310	case CONSTANT_Utf8:
	311	{
	312	tree t = (tree) *datap;
	313	int len = IDENTIFIER_LENGTH (t);
	314	PUT2 (len);
	315	PUTN (IDENTIFIER_POINTER (t), len);
	316	}
	317	break;
	318	}
	319	}
400500c4	320
e04a16fb	321	if (ptr != buffer + length)
400500c4	322	abort ();
e04a16fb AG	323	}
	324
	325	CPool *outgoing_cpool;
	326
e2500fed	327	static GTY(()) tree tag_nodes[13];
4bcde32e	328	static tree
e04a16fb AG	329	get_tag_node (tag)
	330	int tag;
	331	{
19e223db	332	/* A Cache for build_int_2 (CONSTANT_XXX, 0). */
19e223db	333
e04a16fb	334	if (tag_nodes[tag] == NULL_TREE)
1f8f4a0b	335	tag_nodes[tag] = build_int_2 (tag, 0);
e04a16fb AG	336	return tag_nodes[tag];
	337	}
	338
	339	/* Look for a constant pool entry that matches TAG and NAME.
	340	Creates a new entry if not found.
	341	TAG is one of CONSTANT_Utf8, CONSTANT_String or CONSTANT_Class.
	342	NAME is an IDENTIFIER_NODE naming the Utf8 constant, string, or class.
	343	Returns the index of the entry. */
	344
	345	int
	346	alloc_name_constant (tag, name)
	347	int tag;
	348	tree name;
	349	{
	350	return find_constant1 (outgoing_cpool, tag, (jword) name);
	351	}
	352
	353	/* Build an identifier for the internal name of reference type TYPE. */
	354
	355	tree
	356	build_internal_class_name (type)
	357	tree type;
	358	{
	359	tree name;
	360	if (TYPE_ARRAY_P (type))
	361	name = build_java_signature (type);
	362	else
	363	{
	364	name = TYPE_NAME (type);
	365	if (TREE_CODE (name) != IDENTIFIER_NODE)
	366	name = DECL_NAME (name);
	367	name = identifier_subst (name, "", '.', '/', "");
	368	}
	369	return name;
	370	}
	371
	372	/* Look for a CONSTANT_Class entry for CLAS, creating a new one if needed. */
	373
	374	int
	375	alloc_class_constant (clas)
	376	tree clas;
	377	{
7e57923c AH	378	tree class_name = build_internal_class_name (clas);
7e57923c AH	379
e04a16fb	380	return alloc_name_constant (CONSTANT_Class,
7e57923c AH	381	(unmangle_classname
	382	(IDENTIFIER_POINTER(class_name),
	383	IDENTIFIER_LENGTH(class_name))));
e04a16fb AG	384	}
	385
	386	/* Return a reference to the data array of the current constant pool. */
	387
4bcde32e	388	static tree
e04a16fb AG	389	build_constant_data_ref ()
e04a16fb AG	390	{
d3ab697b JS	391	tree cpool_data_ref = NULL_TREE;
d3ab697b JS	392
c2952b01	393	if (TYPE_CPOOL_DATA_REF (current_class))
d3ab697b	394	cpool_data_ref = TYPE_CPOOL_DATA_REF (current_class);
c2952b01	395
d3ab697b	396	if (cpool_data_ref == NULL_TREE)
e04a16fb AG	397	{
	398	tree decl;
	399	tree decl_name = mangled_classname ("_CD_", current_class);
e04a16fb AG	400	decl = build_decl (VAR_DECL, decl_name,
	401	build_array_type (ptr_type_node,
	402	one_elt_array_domain_type));
	403	TREE_STATIC (decl) = 1;
6c418184	404	make_decl_rtl (decl, NULL);
d3ab697b	405	TYPE_CPOOL_DATA_REF (current_class) = cpool_data_ref
e04a16fb AG	406	= build1 (ADDR_EXPR, ptr_type_node, decl);
e04a16fb AG	407	}
d3ab697b	408	return cpool_data_ref;
e04a16fb AG	409	}
	410
	411	/* Get the pointer value at the INDEX'th element of the constant pool. */
	412
	413	tree
	414	build_ref_from_constant_pool (index)
	415	int index;
	416	{
	417	tree t = build_constant_data_ref ();
	418	index *= int_size_in_bytes (ptr_type_node);
	419	t = fold (build (PLUS_EXPR, ptr_type_node,
	420	t, build_int_2 (index, 0)));
	421	return build1 (INDIRECT_REF, ptr_type_node, t);
	422	}
	423
	424	/* Build an initializer for the constants field of the current constal pool.
	425	Should only be called at top-level, since it may emit declarations. */
	426
	427	tree
	428	build_constants_constructor ()
	429	{
	430	tree tags_value, data_value;
	431	tree cons;
	432	tree tags_list = NULL_TREE;
	433	tree data_list = NULL_TREE;
	434	int i;
	435	for (i = outgoing_cpool->count; --i > 0; )
	436	{
	437	tags_list
	438	= tree_cons (NULL_TREE, get_tag_node (outgoing_cpool->tags[i]),
	439	tags_list);
	440	data_list
	441	= tree_cons (NULL_TREE, build_utf8_ref ((tree)outgoing_cpool->data[i]),
	442	data_list);
	443	}
	444	if (outgoing_cpool->count > 0)
	445	{
	446	tree index_type;
	447	tree data_decl, tags_decl, tags_type;
	448	tree max_index = build_int_2 (outgoing_cpool->count - 1, 0);
	449	TREE_TYPE (max_index) = sizetype;
	450	index_type = build_index_type (max_index);
	451
	452	/* Add dummy 0'th element of constant pool. */
	453	tags_list = tree_cons (NULL_TREE, get_tag_node (0), tags_list);
	454	data_list = tree_cons (NULL_TREE, null_pointer_node, data_list);
	455
	456	data_decl = TREE_OPERAND (build_constant_data_ref (), 0);
	457	TREE_TYPE (data_decl) = build_array_type (ptr_type_node, index_type),
	458	DECL_INITIAL (data_decl) = build (CONSTRUCTOR, TREE_TYPE (data_decl),
	459	NULL_TREE, data_list);
	460	DECL_SIZE (data_decl) = TYPE_SIZE (TREE_TYPE (data_decl));
06ceef4e RK	461	DECL_SIZE_UNIT (data_decl) = TYPE_SIZE_UNIT (TREE_TYPE (data_decl));
06ceef4e RK	462	rest_of_decl_compilation (data_decl, (char *) 0, 1, 0);
e04a16fb AG	463	data_value = build_address_of (data_decl);
	464
	465	tags_type = build_array_type (unsigned_byte_type_node, index_type);
	466	tags_decl = build_decl (VAR_DECL, mangled_classname ("_CT_",
	467	current_class),
	468	tags_type);
	469	TREE_STATIC (tags_decl) = 1;
	470	DECL_INITIAL (tags_decl) = build (CONSTRUCTOR, tags_type,
	471	NULL_TREE, tags_list);
	472	rest_of_decl_compilation (tags_decl, (char*) 0, 1, 0);
	473	tags_value = build_address_of (tags_decl);
	474	}
	475	else
	476	{
	477	data_value = null_pointer_node;
	478	tags_value = null_pointer_node;
	479	}
	480	START_RECORD_CONSTRUCTOR (cons, constants_type_node);
	481	PUSH_FIELD_VALUE (cons, "size", build_int_2 (outgoing_cpool->count, 0));
	482	PUSH_FIELD_VALUE (cons, "tags", tags_value);
	483	PUSH_FIELD_VALUE (cons, "data", data_value);
	484	FINISH_RECORD_CONSTRUCTOR (cons);
	485	return cons;
	486	}
e2500fed GK	487
e2500fed GK	488	#include "gt-java-constants.h"