static tree
get_variable_decl (tree exp)
{
if (TREE_CODE (exp) == VAR_DECL)
{
if (! TREE_STATIC (exp) || FIELD_FINAL (exp))
return exp;
}
/* We only care about final parameters. */
else if (TREE_CODE (exp) == PARM_DECL)
{
if (DECL_FINAL (exp))
return exp;
}
/* See if exp is this.field. */
else if (TREE_CODE (exp) == COMPONENT_REF)
{
tree op0 = TREE_OPERAND (exp, 0);
tree op1 = TREE_OPERAND (exp, 1);
tree mdecl = current_function_decl;
if (TREE_CODE (op0) == INDIRECT_REF
&& TREE_CODE (op1) == FIELD_DECL
&& ! METHOD_STATIC (mdecl)
&& FIELD_FINAL (op1))
{
op0 = TREE_OPERAND (op0, 0);
if (op0 == BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (mdecl)))
return op1;
}
}
return NULL_TREE;
}
tree
build_java_array_type (tree element_type, HOST_WIDE_INT length)
{
tree sig, t, fld, atype, arfld;
char buf[23];
tree elsig = build_java_signature (element_type);
tree el_name = element_type;
buf[0] = '[';
if (length >= 0)
sprintf (buf+1, HOST_WIDE_INT_PRINT_DEC, length);
else
buf[1] = '\0';
sig = ident_subst (IDENTIFIER_POINTER (elsig), IDENTIFIER_LENGTH (elsig),
buf, 0, 0, "");
t = IDENTIFIER_SIGNATURE_TYPE (sig);
if (t != NULL_TREE)
return TREE_TYPE (t);
t = make_class ();
IDENTIFIER_SIGNATURE_TYPE (sig) = build_pointer_type (t);
TYPE_ARRAY_P (t) = 1;
if (TREE_CODE (el_name) == POINTER_TYPE)
el_name = TREE_TYPE (el_name);
el_name = TYPE_NAME (el_name);
if (TREE_CODE (el_name) == TYPE_DECL)
el_name = DECL_NAME (el_name);
{
char suffix[23];
if (length >= 0)
sprintf (suffix, "[%d]", (int)length);
else
strcpy (suffix, "[]");
TYPE_NAME (t)
= TYPE_STUB_DECL (t)
= build_decl (input_location, TYPE_DECL,
identifier_subst (el_name, "", '.', '.', suffix),
t);
TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (t)) = true;
}
set_java_signature (t, sig);
set_super_info (0, t, object_type_node, 0);
if (TREE_CODE (element_type) == RECORD_TYPE)
element_type = promote_type (element_type);
TYPE_ARRAY_ELEMENT (t) = element_type;
/* Add length pseudo-field. */
fld = build_decl (input_location,
FIELD_DECL, get_identifier ("length"), int_type_node);
TYPE_FIELDS (t) = fld;
DECL_CONTEXT (fld) = t;
FIELD_PUBLIC (fld) = 1;
FIELD_FINAL (fld) = 1;
TREE_READONLY (fld) = 1;
atype = build_prim_array_type (element_type, length);
arfld = build_decl (input_location,
FIELD_DECL, get_identifier ("data"), atype);
DECL_CONTEXT (arfld) = t;
DECL_CHAIN (fld) = arfld;
DECL_ALIGN (arfld) = TYPE_ALIGN (element_type);
/* We could layout_class, but that loads java.lang.Object prematurely.
* This is called by the parser, and it is a bad idea to do load_class
* in the middle of parsing, because of possible circularity problems. */
push_super_field (t, object_type_node);
layout_type (t);
return t;
}
void
check_for_initialization (tree body, tree mdecl)
{
tree decl;
word buf[2];
words before = buf;
tree owner = DECL_CONTEXT (mdecl);
int is_static_method = METHOD_STATIC (mdecl);
/* We don't need to check final fields of <init> it it calls this(). */
int is_finit_method = DECL_FINIT_P (mdecl) || DECL_INSTINIT_P (mdecl);
int is_init_method
= (is_finit_method || DECL_CLINIT_P (mdecl)
|| (DECL_INIT_P (mdecl) && ! DECL_INIT_CALLS_THIS (mdecl)));
start_current_locals = num_current_locals = 0;
num_current_words = 2;
if (is_init_method)
{
int words_needed, i;
for (decl = TYPE_FIELDS (owner);
decl != NULL_TREE; decl = TREE_CHAIN (decl))
{
if (DECL_FINAL (decl) && FIELD_STATIC (decl) == is_static_method)
{
if (DECL_FIELD_FINAL_IUD (decl))
DECL_BIT_INDEX (decl) = -1;
else
DECL_BIT_INDEX (decl) = num_current_locals++;
}
}
words_needed = WORDS_NEEDED (2 * num_current_locals);
if (words_needed > 2)
{
num_current_words = words_needed;
before = ALLOC_WORDS(words_needed);
}
i = 0;
for (decl = TYPE_FIELDS (owner);
decl != NULL_TREE; decl = TREE_CHAIN (decl))
{
if (FIELD_FINAL (decl) && FIELD_STATIC (decl) == is_static_method)
{
if (! DECL_FIELD_FINAL_IUD (decl))
{
CLEAR_ASSIGNED (before, i);
SET_UNASSIGNED (before, i);
i++;
}
}
}
}
check_init (body, before);
if (is_init_method)
{
for (decl = TYPE_FIELDS (owner);
decl != NULL_TREE; decl = TREE_CHAIN (decl))
{
if (FIELD_FINAL (decl) && FIELD_STATIC (decl) == is_static_method)
{
int index = DECL_BIT_INDEX (decl);
if (index >= 0 && ! ASSIGNED_P (before, index))
{
if (! is_finit_method)
error ("%Jfinal field %qD may not have been initialized",
decl, decl);
}
else if (is_finit_method)
DECL_FIELD_FINAL_IUD (decl) = 1;
/* Re-set to initial state, since we later may use the
same bit for DECL_POINTER_ALIAS_SET. */
DECL_BIT_INDEX (decl) = -1;
}
}
}
start_current_locals = num_current_locals = 0;
}
static tree
get_variable_decl (tree exp)
{
/* A static field can be wrapped in a COMPOUND_EXPR where the first
argument initializes the class. */
if (TREE_CODE (exp) == COMPOUND_EXPR)
exp = extract_field_decl (exp);
if (TREE_CODE (exp) == VAR_DECL)
{
if (! TREE_STATIC (exp) || FIELD_FINAL (exp))
return exp;
}
/* We only care about final parameters. */
else if (TREE_CODE (exp) == PARM_DECL)
{
if (DECL_FINAL (exp))
return exp;
}
/* See if exp is this.field. */
else if (TREE_CODE (exp) == COMPONENT_REF)
{
tree op0 = TREE_OPERAND (exp, 0);
tree op1 = TREE_OPERAND (exp, 1);
tree mdecl = current_function_decl;
if (TREE_CODE (op0) == INDIRECT_REF
&& TREE_CODE (op1) == FIELD_DECL
&& ! METHOD_STATIC (mdecl)
&& FIELD_FINAL (op1))
{
op0 = TREE_OPERAND (op0, 0);
if (op0 == BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (mdecl)))
return op1;
}
}
else if (TREE_CODE (exp) == INDIRECT_REF)
{
/* For indirect dispatch, look for an expression of the form
(indirect_ref (+ (array_ref otable <N>) this)).
FIXME: it would probably be better to generate a JAVA_FIELD_REF
expression that gets converted to OTABLE access at
gimplification time. */
exp = TREE_OPERAND (exp, 0);
if (TREE_CODE (exp) == PLUS_EXPR)
{
tree op0 = TREE_OPERAND (exp, 0);
STRIP_NOPS (op0);
if (TREE_CODE (op0) == ARRAY_REF)
{
tree table = TREE_OPERAND (op0, 0);
if (TREE_CODE (table) == VAR_DECL
&& DECL_LANG_SPECIFIC (table)
&& DECL_OWNER (table)
&& TYPE_OTABLE_DECL (DECL_OWNER (table)) == table)
{
HOST_WIDE_INT index
= TREE_INT_CST_LOW (TREE_OPERAND (op0, 1));
tree otable_methods
= TYPE_OTABLE_METHODS (DECL_OWNER (table));
tree element;
for (element = otable_methods;
element;
element = TREE_CHAIN (element))
{
if (index == 1)
{
tree purpose = TREE_PURPOSE (element);
if (TREE_CODE (purpose) == FIELD_DECL)
return purpose;
else
return NULL_TREE;
}
--index;
}
}
}
}
}
return NULL_TREE;
}