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gengtype.c
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gengtype.c
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/* Process source files and output type information.
Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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.
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "gengtype.h"
#include "gtyp-gen.h"
#include "errors.h"
/* Nonzero iff an error has occurred. */
static int hit_error = 0;
static void gen_rtx_next (void);
static void write_rtx_next (void);
static void open_base_files (void);
static void close_output_files (void);
/* Report an error at POS, printing MSG. */
void
error_at_line (struct fileloc *pos, const char *msg, ...)
{
va_list ap;
va_start (ap, msg);
fprintf (stderr, "%s:%d: ", pos->file, pos->line);
vfprintf (stderr, msg, ap);
fputc ('\n', stderr);
hit_error = 1;
va_end (ap);
}
/* vasprintf, but produces fatal message on out-of-memory. */
int
xvasprintf (char **result, const char *format, va_list args)
{
int ret = vasprintf (result, format, args);
if (*result == NULL || ret < 0)
{
fputs ("gengtype: out of memory", stderr);
xexit (1);
}
return ret;
}
/* Wrapper for xvasprintf. */
char *
xasprintf (const char *format, ...)
{
char *result;
va_list ap;
va_start (ap, format);
xvasprintf (&result, format, ap);
va_end (ap);
return result;
}
/* The one and only TYPE_STRING. */
struct type string_type = {
TYPE_STRING, NULL, NULL, GC_USED, {0}
};
/* Lists of various things. */
static pair_p typedefs;
static type_p structures;
static type_p param_structs;
static pair_p variables;
static void do_scalar_typedef (const char *, struct fileloc *);
static type_p find_param_structure
(type_p t, type_p param[NUM_PARAM]);
static type_p adjust_field_tree_exp (type_p t, options_p opt);
static type_p adjust_field_rtx_def (type_p t, options_p opt);
/* Define S as a typedef to T at POS. */
void
do_typedef (const char *s, type_p t, struct fileloc *pos)
{
pair_p p;
for (p = typedefs; p != NULL; p = p->next)
if (strcmp (p->name, s) == 0)
{
if (p->type != t)
{
error_at_line (pos, "type `%s' previously defined", s);
error_at_line (&p->line, "previously defined here");
}
return;
}
p = XNEW (struct pair);
p->next = typedefs;
p->name = s;
p->type = t;
p->line = *pos;
typedefs = p;
}
/* Define S as a typename of a scalar. */
static void
do_scalar_typedef (const char *s, struct fileloc *pos)
{
do_typedef (s, create_scalar_type (s, strlen (s)), pos);
}
/* Return the type previously defined for S. Use POS to report errors. */
type_p
resolve_typedef (const char *s, struct fileloc *pos)
{
pair_p p;
for (p = typedefs; p != NULL; p = p->next)
if (strcmp (p->name, s) == 0)
return p->type;
error_at_line (pos, "unidentified type `%s'", s);
return create_scalar_type ("char", 4);
}
/* Create a new structure with tag NAME (or a union iff ISUNION is nonzero),
at POS with fields FIELDS and options O. */
void
new_structure (const char *name, int isunion, struct fileloc *pos,
pair_p fields, options_p o)
{
type_p si;
type_p s = NULL;
lang_bitmap bitmap = get_base_file_bitmap (pos->file);
for (si = structures; si != NULL; si = si->next)
if (strcmp (name, si->u.s.tag) == 0
&& UNION_P (si) == isunion)
{
type_p ls = NULL;
if (si->kind == TYPE_LANG_STRUCT)
{
ls = si;
for (si = ls->u.s.lang_struct; si != NULL; si = si->next)
if (si->u.s.bitmap == bitmap)
s = si;
}
else if (si->u.s.line.file != NULL && si->u.s.bitmap != bitmap)
{
ls = si;
si = XCNEW (struct type);
memcpy (si, ls, sizeof (struct type));
ls->kind = TYPE_LANG_STRUCT;
ls->u.s.lang_struct = si;
ls->u.s.fields = NULL;
si->next = NULL;
si->pointer_to = NULL;
si->u.s.lang_struct = ls;
}
else
s = si;
if (ls != NULL && s == NULL)
{
s = XCNEW (struct type);
s->next = ls->u.s.lang_struct;
ls->u.s.lang_struct = s;
s->u.s.lang_struct = ls;
}
break;
}
if (s == NULL)
{
s = XCNEW (struct type);
s->next = structures;
structures = s;
}
if (s->u.s.line.file != NULL
|| (s->u.s.lang_struct && (s->u.s.lang_struct->u.s.bitmap & bitmap)))
{
error_at_line (pos, "duplicate structure definition");
error_at_line (&s->u.s.line, "previous definition here");
}
s->kind = isunion ? TYPE_UNION : TYPE_STRUCT;
s->u.s.tag = name;
s->u.s.line = *pos;
s->u.s.fields = fields;
s->u.s.opt = o;
s->u.s.bitmap = bitmap;
if (s->u.s.lang_struct)
s->u.s.lang_struct->u.s.bitmap |= bitmap;
}
/* Return the previously-defined structure with tag NAME (or a union
iff ISUNION is nonzero), or a new empty structure or union if none
was defined previously. */
type_p
find_structure (const char *name, int isunion)
{
type_p s;
for (s = structures; s != NULL; s = s->next)
if (strcmp (name, s->u.s.tag) == 0
&& UNION_P (s) == isunion)
return s;
s = XCNEW (struct type);
s->next = structures;
structures = s;
s->kind = isunion ? TYPE_UNION : TYPE_STRUCT;
s->u.s.tag = name;
structures = s;
return s;
}
/* Return the previously-defined parameterized structure for structure
T and parameters PARAM, or a new parameterized empty structure or
union if none was defined previously. */
static type_p
find_param_structure (type_p t, type_p param[NUM_PARAM])
{
type_p res;
for (res = param_structs; res; res = res->next)
if (res->u.param_struct.stru == t
&& memcmp (res->u.param_struct.param, param,
sizeof (type_p) * NUM_PARAM) == 0)
break;
if (res == NULL)
{
res = XCNEW (struct type);
res->kind = TYPE_PARAM_STRUCT;
res->next = param_structs;
param_structs = res;
res->u.param_struct.stru = t;
memcpy (res->u.param_struct.param, param, sizeof (type_p) * NUM_PARAM);
}
return res;
}
/* Return a scalar type with name NAME. */
type_p
create_scalar_type (const char *name, size_t name_len)
{
type_p r = XCNEW (struct type);
r->kind = TYPE_SCALAR;
r->u.sc = (char *) xmemdup (name, name_len, name_len + 1);
return r;
}
/* Return a pointer to T. */
type_p
create_pointer (type_p t)
{
if (! t->pointer_to)
{
type_p r = XCNEW (struct type);
r->kind = TYPE_POINTER;
r->u.p = t;
t->pointer_to = r;
}
return t->pointer_to;
}
/* Return an array of length LEN. */
type_p
create_array (type_p t, const char *len)
{
type_p v;
v = XCNEW (struct type);
v->kind = TYPE_ARRAY;
v->u.a.p = t;
v->u.a.len = len;
return v;
}
/* Return an options structure with name NAME and info INFO. */
options_p
create_option (const char *name, void *info)
{
options_p o = XNEW (struct options);
o->name = name;
o->info = (const char*) info;
return o;
}
/* Add a variable named S of type T with options O defined at POS,
to `variables'. */
void
note_variable (const char *s, type_p t, options_p o, struct fileloc *pos)
{
pair_p n;
n = XNEW (struct pair);
n->name = s;
n->type = t;
n->line = *pos;
n->opt = o;
n->next = variables;
variables = n;
}
/* We don't care how long a CONST_DOUBLE is. */
#define CONST_DOUBLE_FORMAT "ww"
/* We don't want to see codes that are only for generator files. */
#undef GENERATOR_FILE
enum rtx_code {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
#include "rtl.def"
#undef DEF_RTL_EXPR
NUM_RTX_CODE
};
static const char * const rtx_name[NUM_RTX_CODE] = {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) NAME ,
#include "rtl.def"
#undef DEF_RTL_EXPR
};
static const char * const rtx_format[NUM_RTX_CODE] = {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) FORMAT ,
#include "rtl.def"
#undef DEF_RTL_EXPR
};
static int rtx_next_new[NUM_RTX_CODE];
/* We also need codes and names for insn notes (not register notes).
Note that we do *not* bias the note values here. */
enum insn_note {
#define DEF_INSN_NOTE(NAME) NAME,
#include "insn-notes.def"
#undef DEF_INSN_NOTE
NOTE_INSN_MAX
};
/* We must allocate one more entry here, as we use NOTE_INSN_MAX as the
default field for line number notes. */
static const char *const note_insn_name[NOTE_INSN_MAX+1] = {
#define DEF_INSN_NOTE(NAME) #NAME,
#include "insn-notes.def"
#undef DEF_INSN_NOTE
};
#undef CONST_DOUBLE_FORMAT
#define GENERATOR_FILE
/* Generate the contents of the rtx_next array. This really doesn't belong
in gengtype at all, but it's needed for adjust_field_rtx_def. */
static void
gen_rtx_next (void)
{
int i;
for (i = 0; i < NUM_RTX_CODE; i++)
{
int k;
rtx_next_new[i] = -1;
if (strncmp (rtx_format[i], "iuu", 3) == 0)
rtx_next_new[i] = 2;
else if (i == COND_EXEC || i == SET || i == EXPR_LIST || i == INSN_LIST)
rtx_next_new[i] = 1;
else
for (k = strlen (rtx_format[i]) - 1; k >= 0; k--)
if (rtx_format[i][k] == 'e' || rtx_format[i][k] == 'u')
rtx_next_new[i] = k;
}
}
/* Write out the contents of the rtx_next array. */
static void
write_rtx_next (void)
{
outf_p f = get_output_file_with_visibility (NULL);
int i;
oprintf (f, "\n/* Used to implement the RTX_NEXT macro. */\n");
oprintf (f, "const unsigned char rtx_next[NUM_RTX_CODE] = {\n");
for (i = 0; i < NUM_RTX_CODE; i++)
if (rtx_next_new[i] == -1)
oprintf (f, " 0,\n");
else
oprintf (f,
" RTX_HDR_SIZE + %d * sizeof (rtunion),\n",
rtx_next_new[i]);
oprintf (f, "};\n");
}
/* Handle `special("rtx_def")'. This is a special case for field
`fld' of struct rtx_def, which is an array of unions whose values
are based in a complex way on the type of RTL. */
static type_p
adjust_field_rtx_def (type_p t, options_p ARG_UNUSED (opt))
{
pair_p flds = NULL;
options_p nodot;
int i;
type_p rtx_tp, rtvec_tp, tree_tp, mem_attrs_tp, note_union_tp, scalar_tp;
type_p bitmap_tp, basic_block_tp, reg_attrs_tp;
if (t->kind != TYPE_UNION)
{
error_at_line (&lexer_line,
"special `rtx_def' must be applied to a union");
return &string_type;
}
nodot = XNEW (struct options);
nodot->next = NULL;
nodot->name = "dot";
nodot->info = "";
rtx_tp = create_pointer (find_structure ("rtx_def", 0));
rtvec_tp = create_pointer (find_structure ("rtvec_def", 0));
tree_tp = create_pointer (find_structure ("tree_node", 1));
mem_attrs_tp = create_pointer (find_structure ("mem_attrs", 0));
reg_attrs_tp = create_pointer (find_structure ("reg_attrs", 0));
bitmap_tp = create_pointer (find_structure ("bitmap_element_def", 0));
basic_block_tp = create_pointer (find_structure ("basic_block_def", 0));
scalar_tp = create_scalar_type ("rtunion scalar", 14);
{
pair_p note_flds = NULL;
int c;
for (c = 0; c <= NOTE_INSN_MAX; c++)
{
pair_p old_note_flds = note_flds;
note_flds = XNEW (struct pair);
note_flds->line.file = __FILE__;
note_flds->line.line = __LINE__;
note_flds->opt = XNEW (struct options);
note_flds->opt->next = nodot;
note_flds->opt->name = "tag";
note_flds->opt->info = note_insn_name[c];
note_flds->next = old_note_flds;
switch (c)
{
/* NOTE_INSN_MAX is used as the default field for line
number notes. */
case NOTE_INSN_MAX:
note_flds->opt->name = "default";
note_flds->name = "rt_str";
note_flds->type = &string_type;
break;
case NOTE_INSN_BLOCK_BEG:
case NOTE_INSN_BLOCK_END:
note_flds->name = "rt_tree";
note_flds->type = tree_tp;
break;
case NOTE_INSN_EXPECTED_VALUE:
case NOTE_INSN_VAR_LOCATION:
note_flds->name = "rt_rtx";
note_flds->type = rtx_tp;
break;
default:
note_flds->name = "rt_int";
note_flds->type = scalar_tp;
break;
}
}
new_structure ("rtx_def_note_subunion", 1, &lexer_line, note_flds, NULL);
}
note_union_tp = find_structure ("rtx_def_note_subunion", 1);
for (i = 0; i < NUM_RTX_CODE; i++)
{
pair_p old_flds = flds;
pair_p subfields = NULL;
size_t aindex, nmindex;
const char *sname;
char *ftag;
for (aindex = 0; aindex < strlen (rtx_format[i]); aindex++)
{
pair_p old_subf = subfields;
type_p t;
const char *subname;
switch (rtx_format[i][aindex])
{
case '*':
case 'i':
case 'n':
case 'w':
t = scalar_tp;
subname = "rt_int";
break;
case '0':
if (i == MEM && aindex == 1)
t = mem_attrs_tp, subname = "rt_mem";
else if (i == JUMP_INSN && aindex == 9)
t = rtx_tp, subname = "rt_rtx";
else if (i == CODE_LABEL && aindex == 4)
t = scalar_tp, subname = "rt_int";
else if (i == CODE_LABEL && aindex == 5)
t = rtx_tp, subname = "rt_rtx";
else if (i == LABEL_REF
&& (aindex == 1 || aindex == 2))
t = rtx_tp, subname = "rt_rtx";
else if (i == NOTE && aindex == 4)
t = note_union_tp, subname = "";
else if (i == NOTE && aindex >= 7)
t = scalar_tp, subname = "rt_int";
else if (i == ADDR_DIFF_VEC && aindex == 4)
t = scalar_tp, subname = "rt_int";
else if (i == VALUE && aindex == 0)
t = scalar_tp, subname = "rt_int";
else if (i == REG && aindex == 1)
t = scalar_tp, subname = "rt_int";
else if (i == REG && aindex == 2)
t = reg_attrs_tp, subname = "rt_reg";
else if (i == SCRATCH && aindex == 0)
t = scalar_tp, subname = "rt_int";
else if (i == SYMBOL_REF && aindex == 1)
t = scalar_tp, subname = "rt_int";
else if (i == SYMBOL_REF && aindex == 2)
t = tree_tp, subname = "rt_tree";
else if (i == BARRIER && aindex >= 3)
t = scalar_tp, subname = "rt_int";
else
{
error_at_line (&lexer_line,
"rtx type `%s' has `0' in position %lu, can't handle",
rtx_name[i], (unsigned long) aindex);
t = &string_type;
subname = "rt_int";
}
break;
case 's':
case 'S':
case 'T':
t = &string_type;
subname = "rt_str";
break;
case 'e':
case 'u':
t = rtx_tp;
subname = "rt_rtx";
break;
case 'E':
case 'V':
t = rtvec_tp;
subname = "rt_rtvec";
break;
case 't':
t = tree_tp;
subname = "rt_tree";
break;
case 'b':
t = bitmap_tp;
subname = "rt_bit";
break;
case 'B':
t = basic_block_tp;
subname = "rt_bb";
break;
default:
error_at_line (&lexer_line,
"rtx type `%s' has `%c' in position %lu, can't handle",
rtx_name[i], rtx_format[i][aindex],
(unsigned long)aindex);
t = &string_type;
subname = "rt_int";
break;
}
subfields = XNEW (struct pair);
subfields->next = old_subf;
subfields->type = t;
subfields->name = xasprintf (".fld[%lu].%s", (unsigned long)aindex,
subname);
subfields->line.file = __FILE__;
subfields->line.line = __LINE__;
if (t == note_union_tp)
{
subfields->opt = XNEW (struct options);
subfields->opt->next = nodot;
subfields->opt->name = "desc";
subfields->opt->info = "NOTE_LINE_NUMBER (&%0)";
}
else if (t == basic_block_tp)
{
/* We don't presently GC basic block structures... */
subfields->opt = XNEW (struct options);
subfields->opt->next = nodot;
subfields->opt->name = "skip";
subfields->opt->info = NULL;
}
else
subfields->opt = nodot;
}
flds = XNEW (struct pair);
flds->next = old_flds;
flds->name = "";
sname = xasprintf ("rtx_def_%s", rtx_name[i]);
new_structure (sname, 0, &lexer_line, subfields, NULL);
flds->type = find_structure (sname, 0);
flds->line.file = __FILE__;
flds->line.line = __LINE__;
flds->opt = XNEW (struct options);
flds->opt->next = nodot;
flds->opt->name = "tag";
ftag = xstrdup (rtx_name[i]);
for (nmindex = 0; nmindex < strlen (ftag); nmindex++)
ftag[nmindex] = TOUPPER (ftag[nmindex]);
flds->opt->info = ftag;
}
new_structure ("rtx_def_subunion", 1, &lexer_line, flds, nodot);
return find_structure ("rtx_def_subunion", 1);
}
/* Handle `special("tree_exp")'. This is a special case for
field `operands' of struct tree_exp, which although it claims to contain
pointers to trees, actually sometimes contains pointers to RTL too.
Passed T, the old type of the field, and OPT its options. Returns
a new type for the field. */
static type_p
adjust_field_tree_exp (type_p t, options_p opt ATTRIBUTE_UNUSED)
{
pair_p flds;
options_p nodot;
if (t->kind != TYPE_ARRAY)
{
error_at_line (&lexer_line,
"special `tree_exp' must be applied to an array");
return &string_type;
}
nodot = XNEW (struct options);
nodot->next = NULL;
nodot->name = "dot";
nodot->info = "";
flds = XNEW (struct pair);
flds->next = NULL;
flds->name = "";
flds->type = t;
flds->line.file = __FILE__;
flds->line.line = __LINE__;
flds->opt = XNEW (struct options);
flds->opt->next = nodot;
flds->opt->name = "length";
flds->opt->info = "TREE_CODE_LENGTH (TREE_CODE ((tree) &%0))";
{
options_p oldopt = flds->opt;
flds->opt = XNEW (struct options);
flds->opt->next = oldopt;
flds->opt->name = "default";
flds->opt->info = "";
}
new_structure ("tree_exp_subunion", 1, &lexer_line, flds, nodot);
return find_structure ("tree_exp_subunion", 1);
}
/* Perform any special processing on a type T, about to become the type
of a field. Return the appropriate type for the field.
At present:
- Converts pointer-to-char, with no length parameter, to TYPE_STRING;
- Similarly for arrays of pointer-to-char;
- Converts structures for which a parameter is provided to
TYPE_PARAM_STRUCT;
- Handles "special" options.
*/
type_p
adjust_field_type (type_p t, options_p opt)
{
int length_p = 0;
const int pointer_p = t->kind == TYPE_POINTER;
type_p params[NUM_PARAM];
int params_p = 0;
int i;
for (i = 0; i < NUM_PARAM; i++)
params[i] = NULL;
for (; opt; opt = opt->next)
if (strcmp (opt->name, "length") == 0)
length_p = 1;
else if (strcmp (opt->name, "param_is") == 0
|| (strncmp (opt->name, "param", 5) == 0
&& ISDIGIT (opt->name[5])
&& strcmp (opt->name + 6, "_is") == 0))
{
int num = ISDIGIT (opt->name[5]) ? opt->name[5] - '0' : 0;
if (! UNION_OR_STRUCT_P (t)
&& (t->kind != TYPE_POINTER || ! UNION_OR_STRUCT_P (t->u.p)))
{
error_at_line (&lexer_line,
"option `%s' may only be applied to structures or structure pointers",
opt->name);
return t;
}
params_p = 1;
if (params[num] != NULL)
error_at_line (&lexer_line, "duplicate `%s' option", opt->name);
if (! ISDIGIT (opt->name[5]))
params[num] = create_pointer ((type_p) opt->info);
else
params[num] = (type_p) opt->info;
}
else if (strcmp (opt->name, "special") == 0)
{
const char *special_name = opt->info;
if (strcmp (special_name, "tree_exp") == 0)
t = adjust_field_tree_exp (t, opt);
else if (strcmp (special_name, "rtx_def") == 0)
t = adjust_field_rtx_def (t, opt);
else
error_at_line (&lexer_line, "unknown special `%s'", special_name);
}
if (params_p)
{
type_p realt;
if (pointer_p)
t = t->u.p;
realt = find_param_structure (t, params);
t = pointer_p ? create_pointer (realt) : realt;
}
if (! length_p
&& pointer_p
&& t->u.p->kind == TYPE_SCALAR
&& (strcmp (t->u.p->u.sc, "char") == 0
|| strcmp (t->u.p->u.sc, "unsigned char") == 0))
return &string_type;
if (t->kind == TYPE_ARRAY && t->u.a.p->kind == TYPE_POINTER
&& t->u.a.p->u.p->kind == TYPE_SCALAR
&& (strcmp (t->u.a.p->u.p->u.sc, "char") == 0
|| strcmp (t->u.a.p->u.p->u.sc, "unsigned char") == 0))
return create_array (&string_type, t->u.a.len);
return t;
}
/* Create a union for YYSTYPE, as yacc would do it, given a fieldlist FIELDS
and information about the correspondence between token types and fields
in TYPEINFO. POS is used for error messages. */
void
note_yacc_type (options_p o, pair_p fields, pair_p typeinfo,
struct fileloc *pos)
{
pair_p p;
pair_p *p_p;
for (p = typeinfo; p; p = p->next)
{
pair_p m;
if (p->name == NULL)
continue;
if (p->type == (type_p) 1)
{
pair_p pp;
int ok = 0;
for (pp = typeinfo; pp; pp = pp->next)
if (pp->type != (type_p) 1
&& strcmp (pp->opt->info, p->opt->info) == 0)
{
ok = 1;
break;
}
if (! ok)
continue;
}
for (m = fields; m; m = m->next)
if (strcmp (m->name, p->name) == 0)
p->type = m->type;
if (p->type == NULL)
{
error_at_line (&p->line,
"couldn't match fieldname `%s'", p->name);
p->name = NULL;
}
}
p_p = &typeinfo;
while (*p_p)
{
pair_p p = *p_p;
if (p->name == NULL
|| p->type == (type_p) 1)
*p_p = p->next;
else
p_p = &p->next;
}
new_structure ("yy_union", 1, pos, typeinfo, o);
do_typedef ("YYSTYPE", find_structure ("yy_union", 1), pos);
}
static void process_gc_options (options_p, enum gc_used_enum,
int *, int *, int *, type_p *);
static void set_gc_used_type (type_p, enum gc_used_enum, type_p *);
static void set_gc_used (pair_p);
/* Handle OPT for set_gc_used_type. */
static void
process_gc_options (options_p opt, enum gc_used_enum level, int *maybe_undef,
int *pass_param, int *length, type_p *nested_ptr)
{
options_p o;
for (o = opt; o; o = o->next)
if (strcmp (o->name, "ptr_alias") == 0 && level == GC_POINTED_TO)
set_gc_used_type ((type_p) o->info, GC_POINTED_TO, NULL);
else if (strcmp (o->name, "maybe_undef") == 0)
*maybe_undef = 1;
else if (strcmp (o->name, "use_params") == 0)
*pass_param = 1;
else if (strcmp (o->name, "length") == 0)
*length = 1;
else if (strcmp (o->name, "nested_ptr") == 0)
*nested_ptr = ((const struct nested_ptr_data *) o->info)->type;
}
/* Set the gc_used field of T to LEVEL, and handle the types it references. */
static void
set_gc_used_type (type_p t, enum gc_used_enum level, type_p param[NUM_PARAM])
{
if (t->gc_used >= level)
return;
t->gc_used = level;
switch (t->kind)
{
case TYPE_STRUCT:
case TYPE_UNION:
{
pair_p f;
int dummy;
type_p dummy2;
process_gc_options (t->u.s.opt, level, &dummy, &dummy, &dummy,
&dummy2);
for (f = t->u.s.fields; f; f = f->next)
{
int maybe_undef = 0;
int pass_param = 0;
int length = 0;
type_p nested_ptr = NULL;
process_gc_options (f->opt, level, &maybe_undef, &pass_param,
&length, &nested_ptr);
if (nested_ptr && f->type->kind == TYPE_POINTER)
set_gc_used_type (nested_ptr, GC_POINTED_TO,
pass_param ? param : NULL);
else if (length && f->type->kind == TYPE_POINTER)
set_gc_used_type (f->type->u.p, GC_USED, NULL);
else if (maybe_undef && f->type->kind == TYPE_POINTER)
set_gc_used_type (f->type->u.p, GC_MAYBE_POINTED_TO, NULL);
else if (pass_param && f->type->kind == TYPE_POINTER && param)
set_gc_used_type (find_param_structure (f->type->u.p, param),
GC_POINTED_TO, NULL);
else
set_gc_used_type (f->type, GC_USED, pass_param ? param : NULL);
}
break;
}
case TYPE_POINTER:
set_gc_used_type (t->u.p, GC_POINTED_TO, NULL);
break;
case TYPE_ARRAY:
set_gc_used_type (t->u.a.p, GC_USED, param);
break;
case TYPE_LANG_STRUCT:
for (t = t->u.s.lang_struct; t; t = t->next)
set_gc_used_type (t, level, param);
break;
case TYPE_PARAM_STRUCT:
{
int i;
for (i = 0; i < NUM_PARAM; i++)
if (t->u.param_struct.param[i] != 0)
set_gc_used_type (t->u.param_struct.param[i], GC_USED, NULL);
}
if (t->u.param_struct.stru->gc_used == GC_POINTED_TO)
level = GC_POINTED_TO;
else
level = GC_USED;
t->u.param_struct.stru->gc_used = GC_UNUSED;
set_gc_used_type (t->u.param_struct.stru, level,
t->u.param_struct.param);
break;
default:
break;
}
}
/* Set the gc_used fields of all the types pointed to by VARIABLES. */
static void
set_gc_used (pair_p variables)
{
pair_p p;
for (p = variables; p; p = p->next)
set_gc_used_type (p->type, GC_USED, NULL);
}
/* File mapping routines. For each input file, there is one output .c file
(but some output files have many input files), and there is one .h file
for the whole build. */
/* The list of output files. */
static outf_p output_files;
/* The output header file that is included into pretty much every
source file. */
static outf_p header_file;
/* Number of files specified in gtfiles. */
#define NUM_GT_FILES (ARRAY_SIZE (all_files) - 1)
/* Number of files in the language files array. */
#define NUM_LANG_FILES (ARRAY_SIZE (lang_files) - 1)
/* Length of srcdir name. */
static int srcdir_len = 0;
#define NUM_BASE_FILES (ARRAY_SIZE (lang_dir_names) - 1)
outf_p base_files[NUM_BASE_FILES];
static outf_p create_file (const char *, const char *);
static const char * get_file_basename (const char *);
/* Create and return an outf_p for a new file for NAME, to be called
ONAME. */