/* RTL reader for GCC.
Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004
+ 2003, 2004, 2005
Free Software Foundation, Inc.
This file is part of GCC.
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#include "bconfig.h"
+
+/* Disable rtl checking; it conflicts with the macro handling. */
+#undef ENABLE_RTL_CHECKING
+
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "obstack.h"
#include "hashtab.h"
+#include "gensupport.h"
static htab_t md_constants;
void (*apply_macro) (rtx, int);
};
+/* Associates PTR (which can be a string, etc.) with the file location
+ specified by FILENAME and LINENO. */
+struct ptr_loc {
+ const void *ptr;
+ const char *filename;
+ int lineno;
+};
+
+/* A structure used to pass data from read_rtx to apply_macro_traverse
+ via htab_traverse. */
+struct macro_traverse_data {
+ /* Instruction queue. */
+ rtx queue;
+ /* Attributes seen for modes. */
+ struct map_value *mode_maps;
+ /* Input file. */
+ FILE *infile;
+ /* The last unknown attribute used as a mode. */
+ const char *unknown_mode_attr;
+};
+
/* If CODE is the number of a code macro, return a real rtx code that
has the same format. Return CODE otherwise. */
#define BELLWETHER_CODE(CODE) \
static bool uses_code_macro_p (rtx, int);
static void apply_code_macro (rtx, int);
static const char *apply_macro_to_string (const char *, struct mapping *, int);
-static rtx apply_macro_to_rtx (rtx, struct mapping *, int);
+static rtx apply_macro_to_rtx (rtx, struct mapping *, int,
+ struct map_value *, FILE *, const char **);
static bool uses_macro_p (rtx, struct mapping *);
static const char *add_condition_to_string (const char *, const char *);
static void add_condition_to_rtx (rtx, const char *);
int, const char *);
static void initialize_macros (void);
static void read_name (char *, FILE *);
+static hashval_t leading_ptr_hash (const void *);
+static int leading_ptr_eq_p (const void *, const void *);
+static void set_rtx_ptr_loc (const void *, const char *, int);
+static const struct ptr_loc *get_rtx_ptr_loc (const void *);
static char *read_string (FILE *, int);
static char *read_quoted_string (FILE *);
static char *read_braced_string (FILE *);
static hashval_t def_hash (const void *);
static int def_name_eq_p (const void *, const void *);
static void read_constants (FILE *infile, char *tmp_char);
+static void read_conditions (FILE *infile, char *tmp_char);
static void validate_const_int (FILE *, const char *);
static int find_macro (struct macro_group *, const char *, FILE *);
static struct mapping *read_mapping (struct macro_group *, htab_t, FILE *);
static void check_code_macro (struct mapping *, FILE *);
-static rtx read_rtx_1 (FILE *);
+static rtx read_rtx_1 (FILE *, struct map_value **);
+static rtx read_rtx_variadic (FILE *, struct map_value **, rtx);
/* The mode and code macro structures. */
static struct macro_group modes, codes;
/* Obstack used for allocating RTL strings. */
static struct obstack string_obstack;
+/* A table of ptr_locs, hashed on the PTR field. */
+static htab_t ptr_locs;
+
+/* An obstack for the above. Plain xmalloc is a bit heavyweight for a
+ small structure like ptr_loc. */
+static struct obstack ptr_loc_obstack;
+
+/* A hash table of triples (A, B, C), where each of A, B and C is a condition
+ and A is equivalent to "B && C". This is used to keep track of the source
+ of conditions that are made up of separate rtx strings (such as the split
+ condition of a define_insn_and_split). */
+static htab_t joined_conditions;
+
+/* An obstack for allocating joined_conditions entries. */
+static struct obstack joined_conditions_obstack;
+
/* Subroutines of read_rtx. */
/* The current line number for the file. */
int read_rtx_lineno = 1;
-/* The filename for aborting with file and line. */
+/* The filename for error reporting. */
const char *read_rtx_filename = "<unknown>";
static void
static void
apply_mode_macro (rtx x, int mode)
{
- PUT_MODE (x, mode);
+ PUT_MODE (x, (enum machine_mode) mode);
}
/* Implementations of the macro_group callbacks for codes. */
static void
apply_code_macro (rtx x, int code)
{
- PUT_CODE (x, code);
+ PUT_CODE (x, (enum rtx_code) code);
+}
+
+/* Map a code or mode attribute string P to the underlying string for
+ MACRO and VALUE. */
+
+static struct map_value *
+map_attr_string (const char *p, struct mapping *macro, int value)
+{
+ const char *attr;
+ struct mapping *m;
+ struct map_value *v;
+
+ /* If there's a "macro:" prefix, check whether the macro name matches.
+ Set ATTR to the start of the attribute name. */
+ attr = strchr (p, ':');
+ if (attr == 0)
+ attr = p;
+ else
+ {
+ if (strncmp (p, macro->name, attr - p) != 0
+ || macro->name[attr - p] != 0)
+ return 0;
+ attr++;
+ }
+
+ /* Find the attribute specification. */
+ m = (struct mapping *) htab_find (macro->group->attrs, &attr);
+ if (m == 0)
+ return 0;
+
+ /* Find the attribute value for VALUE. */
+ for (v = m->values; v != 0; v = v->next)
+ if (v->number == value)
+ break;
+
+ return v;
+}
+
+/* Given an attribute string used as a machine mode, return an index
+ to store in the machine mode to be translated by
+ apply_macro_to_rtx. */
+
+static unsigned int
+mode_attr_index (struct map_value **mode_maps, const char *string)
+{
+ char *p;
+ struct map_value *mv;
+
+ /* Copy the attribute string into permanent storage, without the
+ angle brackets around it. */
+ obstack_grow0 (&string_obstack, string + 1, strlen (string) - 2);
+ p = XOBFINISH (&string_obstack, char *);
+
+ mv = XNEW (struct map_value);
+ mv->number = *mode_maps == 0 ? 0 : (*mode_maps)->number + 1;
+ mv->string = p;
+ mv->next = *mode_maps;
+ *mode_maps = mv;
+
+ /* We return a code which we can map back into this string: the
+ number of machine modes + the number of mode macros + the index
+ we just used. */
+ return MAX_MACHINE_MODE + htab_elements (modes.macros) + mv->number;
+}
+
+/* Apply MODE_MAPS to the top level of X, expanding cases where an
+ attribute is used for a mode. MACRO is the current macro we are
+ expanding, and VALUE is the value to which we are expanding it.
+ INFILE is used for error messages. This sets *UNKNOWN to true if
+ we find a mode attribute which has not yet been defined, and does
+ not change it otherwise. */
+
+static void
+apply_mode_maps (rtx x, struct map_value *mode_maps, struct mapping *macro,
+ int value, FILE *infile, const char **unknown)
+{
+ unsigned int offset;
+ int indx;
+ struct map_value *pm;
+
+ offset = MAX_MACHINE_MODE + htab_elements (modes.macros);
+ if (GET_MODE (x) < offset)
+ return;
+
+ indx = GET_MODE (x) - offset;
+ for (pm = mode_maps; pm; pm = pm->next)
+ {
+ if (pm->number == indx)
+ {
+ struct map_value *v;
+
+ v = map_attr_string (pm->string, macro, value);
+ if (v)
+ PUT_MODE (x, (enum machine_mode) find_mode (v->string, infile));
+ else
+ *unknown = pm->string;
+ return;
+ }
+ }
}
/* Given that MACRO is being expanded as VALUE, apply the appropriate
static const char *
apply_macro_to_string (const char *string, struct mapping *macro, int value)
{
- char *base, *copy, *p, *attr, *start, *end;
- struct mapping *m;
+ char *base, *copy, *p, *start, *end;
struct map_value *v;
if (string == 0)
return string;
base = p = copy = ASTRDUP (string);
- while ((start = index (p, '<')) && (end = index (start, '>')))
+ while ((start = strchr (p, '<')) && (end = strchr (start, '>')))
{
p = start + 1;
- /* If there's a "macro:" prefix, check whether the macro name matches.
- Set ATTR to the start of the attribute name. */
- attr = index (p, ':');
- if (attr == 0 || attr > end)
- attr = p;
- else
- {
- if (strncmp (p, macro->name, attr - p) != 0
- || macro->name[attr - p] != 0)
- continue;
- attr++;
- }
-
- /* Find the attribute specification. */
*end = 0;
- m = (struct mapping *) htab_find (macro->group->attrs, &attr);
+ v = map_attr_string (p, macro, value);
*end = '>';
- if (m == 0)
- continue;
-
- /* Find the attribute value for VALUE. */
- for (v = m->values; v != 0; v = v->next)
- if (v->number == value)
- break;
if (v == 0)
continue;
if (base != copy)
{
obstack_grow (&string_obstack, base, strlen (base) + 1);
- return (char *) obstack_finish (&string_obstack);
+ copy = XOBFINISH (&string_obstack, char *);
+ copy_rtx_ptr_loc (copy, string);
+ return copy;
}
return string;
}
/* Return a copy of ORIGINAL in which all uses of MACRO have been
- replaced by VALUE. */
+ replaced by VALUE. MODE_MAPS holds information about attribute
+ strings used for modes. INFILE is used for error messages. This
+ sets *UNKNOWN_MODE_ATTR to the value of an unknown mode attribute,
+ and does not change it otherwise. */
static rtx
-apply_macro_to_rtx (rtx original, struct mapping *macro, int value)
+apply_macro_to_rtx (rtx original, struct mapping *macro, int value,
+ struct map_value *mode_maps, FILE *infile,
+ const char **unknown_mode_attr)
{
struct macro_group *group;
const char *format_ptr;
/* Create a shallow copy of ORIGINAL. */
bellwether_code = BELLWETHER_CODE (GET_CODE (original));
x = rtx_alloc (bellwether_code);
- memcpy (x, original, RTX_SIZE (bellwether_code));
+ memcpy (x, original, RTX_CODE_SIZE (bellwether_code));
/* Change the mode or code itself. */
group = macro->group;
if (group->uses_macro_p (x, macro->index + group->num_builtins))
group->apply_macro (x, value);
+ if (mode_maps)
+ apply_mode_maps (x, mode_maps, macro, value, infile, unknown_mode_attr);
+
/* Change each string and recursively change each rtx. */
format_ptr = GET_RTX_FORMAT (bellwether_code);
for (i = 0; format_ptr[i] != 0; i++)
switch (format_ptr[i])
{
- case 'S':
case 'T':
+ XTMPL (x, i) = apply_macro_to_string (XTMPL (x, i), macro, value);
+ break;
+
+ case 'S':
case 's':
XSTR (x, i) = apply_macro_to_string (XSTR (x, i), macro, value);
break;
case 'e':
- XEXP (x, i) = apply_macro_to_rtx (XEXP (x, i), macro, value);
+ XEXP (x, i) = apply_macro_to_rtx (XEXP (x, i), macro, value,
+ mode_maps, infile,
+ unknown_mode_attr);
break;
case 'V':
XVEC (x, i) = rtvec_alloc (XVECLEN (original, i));
for (j = 0; j < XVECLEN (x, i); j++)
XVECEXP (x, i, j) = apply_macro_to_rtx (XVECEXP (original, i, j),
- macro, value);
+ macro, value, mode_maps,
+ infile,
+ unknown_mode_attr);
}
break;
static const char *
add_condition_to_string (const char *original, const char *extra)
{
- char *result;
-
- if (original == 0 || original[0] == 0)
- return extra;
-
- if ((original[0] == '&' && original[1] == '&') || extra[0] == 0)
+ if (original != 0 && original[0] == '&' && original[1] == '&')
return original;
-
- asprintf (&result, "(%s) && (%s)", original, extra);
- return result;
+ return join_c_conditions (original, extra);
}
/* Like add_condition, but applied to all conditions in rtx X. */
static int
apply_macro_traverse (void **slot, void *data)
{
+ struct macro_traverse_data *mtd = (struct macro_traverse_data *) data;
struct mapping *macro;
struct map_value *v;
rtx elem, new_elem, original, x;
macro = (struct mapping *) *slot;
- for (elem = (rtx) data; elem != 0; elem = XEXP (elem, 1))
+ for (elem = mtd->queue; elem != 0; elem = XEXP (elem, 1))
if (uses_macro_p (XEXP (elem, 0), macro))
{
+ /* For each macro we expand, we set UNKNOWN_MODE_ATTR to NULL.
+ If apply_macro_rtx finds an unknown attribute for a mode,
+ it will set it to the attribute. We want to know whether
+ the attribute is unknown after we have expanded all
+ possible macros, so setting it to NULL here gives us the
+ right result when the hash table traversal is complete. */
+ mtd->unknown_mode_attr = NULL;
+
original = XEXP (elem, 0);
for (v = macro->values; v != 0; v = v->next)
{
- x = apply_macro_to_rtx (original, macro, v->number);
+ x = apply_macro_to_rtx (original, macro, v->number,
+ mtd->mode_maps, mtd->infile,
+ &mtd->unknown_mode_attr);
add_condition_to_rtx (x, v->string);
if (v != macro->values)
{
}
}
+/* Return a hash value for the pointer pointed to by DEF. */
+
+static hashval_t
+leading_ptr_hash (const void *def)
+{
+ return htab_hash_pointer (*(const void *const *) def);
+}
+
+/* Return true if DEF1 and DEF2 are pointers to the same pointer. */
+
+static int
+leading_ptr_eq_p (const void *def1, const void *def2)
+{
+ return *(const void *const *) def1 == *(const void *const *) def2;
+}
+
+/* Associate PTR with the file position given by FILENAME and LINENO. */
+
+static void
+set_rtx_ptr_loc (const void *ptr, const char *filename, int lineno)
+{
+ struct ptr_loc *loc;
+
+ loc = (struct ptr_loc *) obstack_alloc (&ptr_loc_obstack,
+ sizeof (struct ptr_loc));
+ loc->ptr = ptr;
+ loc->filename = filename;
+ loc->lineno = lineno;
+ *htab_find_slot (ptr_locs, loc, INSERT) = loc;
+}
+
+/* Return the position associated with pointer PTR. Return null if no
+ position was set. */
+
+static const struct ptr_loc *
+get_rtx_ptr_loc (const void *ptr)
+{
+ return (const struct ptr_loc *) htab_find (ptr_locs, &ptr);
+}
+
+/* Associate NEW_PTR with the same file position as OLD_PTR. */
+
+void
+copy_rtx_ptr_loc (const void *new_ptr, const void *old_ptr)
+{
+ const struct ptr_loc *loc = get_rtx_ptr_loc (old_ptr);
+ if (loc != 0)
+ set_rtx_ptr_loc (new_ptr, loc->filename, loc->lineno);
+}
+
+/* If PTR is associated with a known file position, print a #line
+ directive for it. */
+
+void
+print_rtx_ptr_loc (const void *ptr)
+{
+ const struct ptr_loc *loc = get_rtx_ptr_loc (ptr);
+ if (loc != 0)
+ printf ("#line %d \"%s\"\n", loc->lineno, loc->filename);
+}
+
+/* Return a condition that satisfies both COND1 and COND2. Either string
+ may be null or empty. */
+
+const char *
+join_c_conditions (const char *cond1, const char *cond2)
+{
+ char *result;
+ const void **entry;
+
+ if (cond1 == 0 || cond1[0] == 0)
+ return cond2;
+
+ if (cond2 == 0 || cond2[0] == 0)
+ return cond1;
+
+ result = concat ("(", cond1, ") && (", cond2, ")", NULL);
+ obstack_ptr_grow (&joined_conditions_obstack, result);
+ obstack_ptr_grow (&joined_conditions_obstack, cond1);
+ obstack_ptr_grow (&joined_conditions_obstack, cond2);
+ entry = XOBFINISH (&joined_conditions_obstack, const void **);
+ *htab_find_slot (joined_conditions, entry, INSERT) = entry;
+ return result;
+}
+
+/* Print condition COND, wrapped in brackets. If COND was created by
+ join_c_conditions, recursively invoke this function for the original
+ conditions and join the result with "&&". Otherwise print a #line
+ directive for COND if its original file position is known. */
+
+void
+print_c_condition (const char *cond)
+{
+ const char **halves = (const char **) htab_find (joined_conditions, &cond);
+ if (halves != 0)
+ {
+ printf ("(");
+ print_c_condition (halves[1]);
+ printf (" && ");
+ print_c_condition (halves[2]);
+ printf (")");
+ }
+ else
+ {
+ putc ('\n', stdout);
+ print_rtx_ptr_loc (cond);
+ printf ("(%s)", cond);
+ }
+}
+
/* Read chars from INFILE until a non-whitespace char
and return that. Comments, both Lisp style and C style,
are treated as whitespace.
p = str;
while (1)
{
- if (c == ' ' || c == '\n' || c == '\t' || c == '\f' || c == '\r')
+ if (c == ' ' || c == '\n' || c == '\t' || c == '\f' || c == '\r' || c == EOF)
break;
if (c == ':' || c == ')' || c == ']' || c == '"' || c == '/'
|| c == '(' || c == '[')
read_escape (infile);
continue;
}
- else if (c == '"')
+ else if (c == '"' || c == EOF)
break;
obstack_1grow (&string_obstack, c);
}
obstack_1grow (&string_obstack, 0);
- return (char *) obstack_finish (&string_obstack);
+ return XOBFINISH (&string_obstack, char *);
}
/* Read a braced string (a la Tcl) onto the string obstack. Caller
}
obstack_1grow (&string_obstack, 0);
- return (char *) obstack_finish (&string_obstack);
+ return XOBFINISH (&string_obstack, char *);
}
/* Read some kind of string constant. This is the high-level routine
{
char *stringbuf;
int saw_paren = 0;
- int c;
+ int c, old_lineno;
c = read_skip_spaces (infile);
if (c == '(')
c = read_skip_spaces (infile);
}
+ old_lineno = read_rtx_lineno;
if (c == '"')
stringbuf = read_quoted_string (infile);
else if (c == '{')
fatal_expected_char (infile, ')', c);
}
+ set_rtx_ptr_loc (stringbuf, read_rtx_filename, old_lineno);
return stringbuf;
}
\f
if (md_constants)
htab_traverse (md_constants, callback, info);
}
+\f
+/* INFILE is a FILE pointer to read text from. TMP_CHAR is a buffer
+ suitable to read a name or number into. Process a
+ define_conditions directive, starting with the optional space after
+ the "define_conditions". The directive looks like this:
+
+ (define_conditions [
+ (number "string")
+ (number "string")
+ ...
+ ])
+
+ It's not intended to appear in machine descriptions. It is
+ generated by (the program generated by) genconditions.c, and
+ slipped in at the beginning of the sequence of MD files read by
+ most of the other generators. */
+static void
+read_conditions (FILE *infile, char *tmp_char)
+{
+ int c;
+
+ c = read_skip_spaces (infile);
+ if (c != '[')
+ fatal_expected_char (infile, '[', c);
+
+ while ( (c = read_skip_spaces (infile)) != ']')
+ {
+ char *expr;
+ int value;
+
+ if (c != '(')
+ fatal_expected_char (infile, '(', c);
+
+ read_name (tmp_char, infile);
+ validate_const_int (infile, tmp_char);
+ value = atoi (tmp_char);
+
+ c = read_skip_spaces (infile);
+ if (c != '"')
+ fatal_expected_char (infile, '"', c);
+ expr = read_quoted_string (infile);
+
+ c = read_skip_spaces (infile);
+ if (c != ')')
+ fatal_expected_char (infile, ')', c);
+
+ add_c_test (expr, value);
+ }
+ c = read_skip_spaces (infile);
+ if (c != ')')
+ fatal_expected_char (infile, ')', c);
+}
static void
validate_const_int (FILE *infile, const char *string)
struct map_value *v;
enum rtx_code bellwether;
- bellwether = macro->values->number;
+ bellwether = (enum rtx_code) macro->values->number;
for (v = macro->values->next; v != 0; v = v->next)
if (strcmp (GET_RTX_FORMAT (bellwether), GET_RTX_FORMAT (v->number)) != 0)
fatal_with_file_and_line (infile, "code macro `%s' combines "
initialize_macros ();
obstack_init (&string_obstack);
queue_head = rtx_alloc (EXPR_LIST);
+ ptr_locs = htab_create (161, leading_ptr_hash, leading_ptr_eq_p, 0);
+ obstack_init (&ptr_loc_obstack);
+ joined_conditions = htab_create (161, leading_ptr_hash,
+ leading_ptr_eq_p, 0);
+ obstack_init (&joined_conditions_obstack);
}
if (queue_next == 0)
{
+ struct map_value *mode_maps;
+ struct macro_traverse_data mtd;
+ rtx from_file;
+
c = read_skip_spaces (infile);
if (c == EOF)
return false;
ungetc (c, infile);
- queue_next = queue_head;
queue_lineno = read_rtx_lineno;
- XEXP (queue_next, 0) = read_rtx_1 (infile);
+ mode_maps = 0;
+ from_file = read_rtx_1 (infile, &mode_maps);
+ if (from_file == 0)
+ return false; /* This confuses a top level (nil) with end of
+ file, but a top level (nil) would have
+ crashed our caller anyway. */
+
+ queue_next = queue_head;
+ XEXP (queue_next, 0) = from_file;
XEXP (queue_next, 1) = 0;
- htab_traverse (modes.macros, apply_macro_traverse, queue_next);
- htab_traverse (codes.macros, apply_macro_traverse, queue_next);
+ mtd.queue = queue_next;
+ mtd.mode_maps = mode_maps;
+ mtd.infile = infile;
+ mtd.unknown_mode_attr = mode_maps ? mode_maps->string : NULL;
+ htab_traverse (modes.macros, apply_macro_traverse, &mtd);
+ htab_traverse (codes.macros, apply_macro_traverse, &mtd);
+ if (mtd.unknown_mode_attr)
+ fatal_with_file_and_line (infile,
+ "undefined attribute '%s' used for mode",
+ mtd.unknown_mode_attr);
}
*x = XEXP (queue_next, 0);
doesn't apply any macros. */
static rtx
-read_rtx_1 (FILE *infile)
+read_rtx_1 (FILE *infile, struct map_value **mode_maps)
{
int i;
RTX_CODE real_code, bellwether_code;
again:
c = read_skip_spaces (infile); /* Should be open paren. */
+
+ if (c == EOF)
+ return 0;
+
if (c != '(')
fatal_expected_char (infile, '(', c);
read_constants (infile, tmp_char);
goto again;
}
+ if (strcmp (tmp_char, "define_conditions") == 0)
+ {
+ read_conditions (infile, tmp_char);
+ goto again;
+ }
if (strcmp (tmp_char, "define_mode_attr") == 0)
{
read_mapping (&modes, modes.attrs, infile);
check_code_macro (read_mapping (&codes, codes.macros, infile), infile);
goto again;
}
- real_code = find_macro (&codes, tmp_char, infile);
+ real_code = (enum rtx_code) find_macro (&codes, tmp_char, infile);
bellwether_code = BELLWETHER_CODE (real_code);
/* If we end up with an insn expression then we free this space below. */
i = read_skip_spaces (infile);
if (i == ':')
{
+ unsigned int mode;
+
read_name (tmp_char, infile);
- PUT_MODE (return_rtx, find_macro (&modes, tmp_char, infile));
+ if (tmp_char[0] != '<' || tmp_char[strlen (tmp_char) - 1] != '>')
+ mode = find_macro (&modes, tmp_char, infile);
+ else
+ mode = mode_attr_index (mode_maps, tmp_char);
+ PUT_MODE (return_rtx, (enum machine_mode) mode);
+ if (GET_MODE (return_rtx) != mode)
+ fatal_with_file_and_line (infile, "mode too large");
}
else
ungetc (i, infile);
case 'e':
case 'u':
- XEXP (return_rtx, i) = read_rtx_1 (infile);
+ XEXP (return_rtx, i) = read_rtx_1 (infile, mode_maps);
break;
case 'V':
{
ungetc (c, infile);
list_counter++;
- obstack_ptr_grow (&vector_stack, read_rtx_1 (infile));
+ obstack_ptr_grow (&vector_stack, read_rtx_1 (infile, mode_maps));
}
if (list_counter > 0)
{
memcpy (&return_vec->elem[0], obstack_finish (&vector_stack),
list_counter * sizeof (rtx));
}
+ else if (format_ptr[i] == 'E')
+ fatal_with_file_and_line (infile,
+ "vector must have at least one element");
XVEC (return_rtx, i) = return_vec;
obstack_free (&vector_stack, NULL);
/* close bracket gotten */
obstack_grow (&string_obstack, fn, strlen (fn));
sprintf (line_name, ":%d", read_rtx_lineno);
obstack_grow (&string_obstack, line_name, strlen (line_name)+1);
- stringbuf = (char *) obstack_finish (&string_obstack);
+ stringbuf = XOBFINISH (&string_obstack, char *);
}
if (star_if_braced)
break;
default:
- fprintf (stderr,
- "switch format wrong in rtl.read_rtx(). format was: %c.\n",
- format_ptr[i]);
- fprintf (stderr, "\tfile position: %ld\n", ftell (infile));
- abort ();
+ gcc_unreachable ();
}
c = read_skip_spaces (infile);
if (c != ')')
- fatal_expected_char (infile, ')', c);
+ {
+ /* Syntactic sugar for AND and IOR, allowing Lisp-like
+ arbitrary number of arguments for them. */
+ if (c == '(' && (GET_CODE (return_rtx) == AND
+ || GET_CODE (return_rtx) == IOR))
+ return read_rtx_variadic (infile, mode_maps, return_rtx);
+ else
+ fatal_expected_char (infile, ')', c);
+ }
return return_rtx;
}
+
+/* Mutually recursive subroutine of read_rtx which reads
+ (thing x1 x2 x3 ...) and produces RTL as if
+ (thing x1 (thing x2 (thing x3 ...))) had been written.
+ When called, FORM is (thing x1 x2), and the file position
+ is just past the leading parenthesis of x3. Only works
+ for THINGs which are dyadic expressions, e.g. AND, IOR. */
+static rtx
+read_rtx_variadic (FILE *infile, struct map_value **mode_maps, rtx form)
+{
+ char c = '(';
+ rtx p = form, q;
+
+ do
+ {
+ ungetc (c, infile);
+
+ q = rtx_alloc (GET_CODE (p));
+ PUT_MODE (q, GET_MODE (p));
+
+ XEXP (q, 0) = XEXP (p, 1);
+ XEXP (q, 1) = read_rtx_1 (infile, mode_maps);
+
+ XEXP (p, 1) = q;
+ p = q;
+ c = read_skip_spaces (infile);
+ }
+ while (c == '(');
+
+ if (c != ')')
+ fatal_expected_char (infile, ')', c);
+
+ return form;
+}
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