1746 lines
46 KiB
C
1746 lines
46 KiB
C
/* RTL reader for GCC.
|
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Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
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2003, 2004, 2005
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
|
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Software Foundation; either version 2, or (at your option) any later
|
||
version.
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|
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
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for more details.
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You should have received a copy of the GNU General Public License
|
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "bconfig.h"
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/* Disable rtl checking; it conflicts with the macro handling. */
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#undef ENABLE_RTL_CHECKING
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "rtl.h"
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#include "obstack.h"
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#include "hashtab.h"
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#include "gensupport.h"
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static htab_t md_constants;
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/* One element in a singly-linked list of (integer, string) pairs. */
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struct map_value {
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struct map_value *next;
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int number;
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const char *string;
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};
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/* Maps a macro or attribute name to a list of (integer, string) pairs.
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The integers are mode or code values; the strings are either C conditions
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or attribute values. */
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struct mapping {
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/* The name of the macro or attribute. */
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const char *name;
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/* The group (modes or codes) to which the macro or attribute belongs. */
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struct macro_group *group;
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/* Gives a unique number to the attribute or macro. Numbers are
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allocated consecutively, starting at 0. */
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int index;
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/* The list of (integer, string) pairs. */
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struct map_value *values;
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};
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/* A structure for abstracting the common parts of code and mode macros. */
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struct macro_group {
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/* Tables of "mapping" structures, one for attributes and one for macros. */
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htab_t attrs, macros;
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/* The number of "real" modes or codes (and by extension, the first
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number available for use as a macro placeholder). */
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int num_builtins;
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/* Treat the given string as the name of a standard mode or code and
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return its integer value. Use the given file for error reporting. */
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int (*find_builtin) (const char *, FILE *);
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/* Return true if the given rtx uses the given mode or code. */
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bool (*uses_macro_p) (rtx, int);
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/* Make the given rtx use the given mode or code. */
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void (*apply_macro) (rtx, int);
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};
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/* Associates PTR (which can be a string, etc.) with the file location
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specified by FILENAME and LINENO. */
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struct ptr_loc {
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const void *ptr;
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const char *filename;
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int lineno;
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};
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/* A structure used to pass data from read_rtx to apply_macro_traverse
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via htab_traverse. */
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struct macro_traverse_data {
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/* Instruction queue. */
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rtx queue;
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/* Attributes seen for modes. */
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struct map_value *mode_maps;
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/* Input file. */
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FILE *infile;
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/* The last unknown attribute used as a mode. */
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const char *unknown_mode_attr;
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};
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/* If CODE is the number of a code macro, return a real rtx code that
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has the same format. Return CODE otherwise. */
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#define BELLWETHER_CODE(CODE) \
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((CODE) < NUM_RTX_CODE ? CODE : bellwether_codes[CODE - NUM_RTX_CODE])
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static void fatal_with_file_and_line (FILE *, const char *, ...)
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ATTRIBUTE_PRINTF_2 ATTRIBUTE_NORETURN;
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static void fatal_expected_char (FILE *, int, int) ATTRIBUTE_NORETURN;
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static int find_mode (const char *, FILE *);
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static bool uses_mode_macro_p (rtx, int);
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static void apply_mode_macro (rtx, int);
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static int find_code (const char *, FILE *);
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static bool uses_code_macro_p (rtx, int);
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static void apply_code_macro (rtx, int);
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static const char *apply_macro_to_string (const char *, struct mapping *, int);
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static rtx apply_macro_to_rtx (rtx, struct mapping *, int,
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struct map_value *, FILE *, const char **);
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static bool uses_macro_p (rtx, struct mapping *);
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static const char *add_condition_to_string (const char *, const char *);
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static void add_condition_to_rtx (rtx, const char *);
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static int apply_macro_traverse (void **, void *);
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static struct mapping *add_mapping (struct macro_group *, htab_t t,
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const char *, FILE *);
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static struct map_value **add_map_value (struct map_value **,
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int, const char *);
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static void initialize_macros (void);
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static void read_name (char *, FILE *);
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static hashval_t leading_ptr_hash (const void *);
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static int leading_ptr_eq_p (const void *, const void *);
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static void set_rtx_ptr_loc (const void *, const char *, int);
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static const struct ptr_loc *get_rtx_ptr_loc (const void *);
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static char *read_string (FILE *, int);
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static char *read_quoted_string (FILE *);
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static char *read_braced_string (FILE *);
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static void read_escape (FILE *);
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static hashval_t def_hash (const void *);
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static int def_name_eq_p (const void *, const void *);
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static void read_constants (FILE *infile, char *tmp_char);
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static void read_conditions (FILE *infile, char *tmp_char);
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static void validate_const_int (FILE *, const char *);
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static int find_macro (struct macro_group *, const char *, FILE *);
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static struct mapping *read_mapping (struct macro_group *, htab_t, FILE *);
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static void check_code_macro (struct mapping *, FILE *);
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static rtx read_rtx_1 (FILE *, struct map_value **);
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static rtx read_rtx_variadic (FILE *, struct map_value **, rtx);
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/* The mode and code macro structures. */
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static struct macro_group modes, codes;
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/* Index I is the value of BELLWETHER_CODE (I + NUM_RTX_CODE). */
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static enum rtx_code *bellwether_codes;
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/* Obstack used for allocating RTL strings. */
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static struct obstack string_obstack;
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/* A table of ptr_locs, hashed on the PTR field. */
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static htab_t ptr_locs;
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/* An obstack for the above. Plain xmalloc is a bit heavyweight for a
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small structure like ptr_loc. */
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static struct obstack ptr_loc_obstack;
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/* A hash table of triples (A, B, C), where each of A, B and C is a condition
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and A is equivalent to "B && C". This is used to keep track of the source
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of conditions that are made up of separate rtx strings (such as the split
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condition of a define_insn_and_split). */
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static htab_t joined_conditions;
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/* An obstack for allocating joined_conditions entries. */
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static struct obstack joined_conditions_obstack;
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/* Subroutines of read_rtx. */
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/* The current line number for the file. */
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int read_rtx_lineno = 1;
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/* The filename for error reporting. */
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const char *read_rtx_filename = "<unknown>";
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static void
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fatal_with_file_and_line (FILE *infile, const char *msg, ...)
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{
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char context[64];
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size_t i;
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int c;
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va_list ap;
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va_start (ap, msg);
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fprintf (stderr, "%s:%d: ", read_rtx_filename, read_rtx_lineno);
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vfprintf (stderr, msg, ap);
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putc ('\n', stderr);
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/* Gather some following context. */
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for (i = 0; i < sizeof (context)-1; ++i)
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{
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c = getc (infile);
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if (c == EOF)
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break;
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if (c == '\r' || c == '\n')
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break;
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context[i] = c;
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}
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context[i] = '\0';
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fprintf (stderr, "%s:%d: following context is `%s'\n",
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read_rtx_filename, read_rtx_lineno, context);
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va_end (ap);
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exit (1);
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}
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/* Dump code after printing a message. Used when read_rtx finds
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invalid data. */
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static void
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fatal_expected_char (FILE *infile, int expected_c, int actual_c)
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{
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fatal_with_file_and_line (infile, "expected character `%c', found `%c'",
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expected_c, actual_c);
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}
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/* Implementations of the macro_group callbacks for modes. */
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static int
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find_mode (const char *name, FILE *infile)
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{
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int i;
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for (i = 0; i < NUM_MACHINE_MODES; i++)
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if (strcmp (GET_MODE_NAME (i), name) == 0)
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return i;
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fatal_with_file_and_line (infile, "unknown mode `%s'", name);
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}
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static bool
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uses_mode_macro_p (rtx x, int mode)
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{
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return (int) GET_MODE (x) == mode;
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}
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static void
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apply_mode_macro (rtx x, int mode)
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{
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PUT_MODE (x, (enum machine_mode) mode);
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}
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/* Implementations of the macro_group callbacks for codes. */
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static int
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find_code (const char *name, FILE *infile)
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{
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int i;
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for (i = 0; i < NUM_RTX_CODE; i++)
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if (strcmp (GET_RTX_NAME (i), name) == 0)
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return i;
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fatal_with_file_and_line (infile, "unknown rtx code `%s'", name);
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}
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static bool
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uses_code_macro_p (rtx x, int code)
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{
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return (int) GET_CODE (x) == code;
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}
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static void
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apply_code_macro (rtx x, int code)
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{
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PUT_CODE (x, (enum rtx_code) code);
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}
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/* Map a code or mode attribute string P to the underlying string for
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MACRO and VALUE. */
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static struct map_value *
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map_attr_string (const char *p, struct mapping *macro, int value)
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{
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const char *attr;
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struct mapping *m;
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struct map_value *v;
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/* If there's a "macro:" prefix, check whether the macro name matches.
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Set ATTR to the start of the attribute name. */
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attr = strchr (p, ':');
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if (attr == 0)
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attr = p;
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else
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{
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if (strncmp (p, macro->name, attr - p) != 0
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|| macro->name[attr - p] != 0)
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return 0;
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attr++;
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}
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/* Find the attribute specification. */
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m = (struct mapping *) htab_find (macro->group->attrs, &attr);
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if (m == 0)
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return 0;
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/* Find the attribute value for VALUE. */
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for (v = m->values; v != 0; v = v->next)
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if (v->number == value)
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break;
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return v;
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}
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/* Given an attribute string used as a machine mode, return an index
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to store in the machine mode to be translated by
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apply_macro_to_rtx. */
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static unsigned int
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mode_attr_index (struct map_value **mode_maps, const char *string)
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{
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char *p;
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struct map_value *mv;
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/* Copy the attribute string into permanent storage, without the
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angle brackets around it. */
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obstack_grow0 (&string_obstack, string + 1, strlen (string) - 2);
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p = XOBFINISH (&string_obstack, char *);
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mv = XNEW (struct map_value);
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mv->number = *mode_maps == 0 ? 0 : (*mode_maps)->number + 1;
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mv->string = p;
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mv->next = *mode_maps;
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*mode_maps = mv;
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/* We return a code which we can map back into this string: the
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number of machine modes + the number of mode macros + the index
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we just used. */
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return MAX_MACHINE_MODE + htab_elements (modes.macros) + mv->number;
|
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}
|
||
|
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/* Apply MODE_MAPS to the top level of X, expanding cases where an
|
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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
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||
apply_mode_maps (rtx x, struct map_value *mode_maps, struct mapping *macro,
|
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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;
|
||
|
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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
|
||
string substitutions to STRING. Return the new string if any changes
|
||
were needed, otherwise return STRING itself. */
|
||
|
||
static const char *
|
||
apply_macro_to_string (const char *string, struct mapping *macro, int value)
|
||
{
|
||
char *base, *copy, *p, *start, *end;
|
||
struct map_value *v;
|
||
|
||
if (string == 0)
|
||
return string;
|
||
|
||
base = p = copy = ASTRDUP (string);
|
||
while ((start = strchr (p, '<')) && (end = strchr (start, '>')))
|
||
{
|
||
p = start + 1;
|
||
|
||
*end = 0;
|
||
v = map_attr_string (p, macro, value);
|
||
*end = '>';
|
||
if (v == 0)
|
||
continue;
|
||
|
||
/* Add everything between the last copied byte and the '<',
|
||
then add in the attribute value. */
|
||
obstack_grow (&string_obstack, base, start - base);
|
||
obstack_grow (&string_obstack, v->string, strlen (v->string));
|
||
base = end + 1;
|
||
}
|
||
if (base != copy)
|
||
{
|
||
obstack_grow (&string_obstack, base, strlen (base) + 1);
|
||
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. 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,
|
||
struct map_value *mode_maps, FILE *infile,
|
||
const char **unknown_mode_attr)
|
||
{
|
||
struct macro_group *group;
|
||
const char *format_ptr;
|
||
int i, j;
|
||
rtx x;
|
||
enum rtx_code bellwether_code;
|
||
|
||
if (original == 0)
|
||
return original;
|
||
|
||
/* Create a shallow copy of ORIGINAL. */
|
||
bellwether_code = BELLWETHER_CODE (GET_CODE (original));
|
||
x = rtx_alloc (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 '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,
|
||
mode_maps, infile,
|
||
unknown_mode_attr);
|
||
break;
|
||
|
||
case 'V':
|
||
case 'E':
|
||
if (XVEC (original, i))
|
||
{
|
||
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, mode_maps,
|
||
infile,
|
||
unknown_mode_attr);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
return x;
|
||
}
|
||
|
||
/* Return true if X (or some subexpression of X) uses macro MACRO. */
|
||
|
||
static bool
|
||
uses_macro_p (rtx x, struct mapping *macro)
|
||
{
|
||
struct macro_group *group;
|
||
const char *format_ptr;
|
||
int i, j;
|
||
|
||
if (x == 0)
|
||
return false;
|
||
|
||
group = macro->group;
|
||
if (group->uses_macro_p (x, macro->index + group->num_builtins))
|
||
return true;
|
||
|
||
format_ptr = GET_RTX_FORMAT (BELLWETHER_CODE (GET_CODE (x)));
|
||
for (i = 0; format_ptr[i] != 0; i++)
|
||
switch (format_ptr[i])
|
||
{
|
||
case 'e':
|
||
if (uses_macro_p (XEXP (x, i), macro))
|
||
return true;
|
||
break;
|
||
|
||
case 'V':
|
||
case 'E':
|
||
if (XVEC (x, i))
|
||
for (j = 0; j < XVECLEN (x, i); j++)
|
||
if (uses_macro_p (XVECEXP (x, i, j), macro))
|
||
return true;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* Return a condition that must satisfy both ORIGINAL and EXTRA. If ORIGINAL
|
||
has the form "&& ..." (as used in define_insn_and_splits), assume that
|
||
EXTRA is already satisfied. Empty strings are treated like "true". */
|
||
|
||
static const char *
|
||
add_condition_to_string (const char *original, const char *extra)
|
||
{
|
||
if (original != 0 && original[0] == '&' && original[1] == '&')
|
||
return original;
|
||
return join_c_conditions (original, extra);
|
||
}
|
||
|
||
/* Like add_condition, but applied to all conditions in rtx X. */
|
||
|
||
static void
|
||
add_condition_to_rtx (rtx x, const char *extra)
|
||
{
|
||
switch (GET_CODE (x))
|
||
{
|
||
case DEFINE_INSN:
|
||
case DEFINE_EXPAND:
|
||
XSTR (x, 2) = add_condition_to_string (XSTR (x, 2), extra);
|
||
break;
|
||
|
||
case DEFINE_SPLIT:
|
||
case DEFINE_PEEPHOLE:
|
||
case DEFINE_PEEPHOLE2:
|
||
case DEFINE_COND_EXEC:
|
||
XSTR (x, 1) = add_condition_to_string (XSTR (x, 1), extra);
|
||
break;
|
||
|
||
case DEFINE_INSN_AND_SPLIT:
|
||
XSTR (x, 2) = add_condition_to_string (XSTR (x, 2), extra);
|
||
XSTR (x, 4) = add_condition_to_string (XSTR (x, 4), extra);
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* A htab_traverse callback. Search the EXPR_LIST given by DATA
|
||
for rtxes that use the macro in *SLOT. Replace each such rtx
|
||
with a list of expansions. */
|
||
|
||
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 = 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,
|
||
mtd->mode_maps, mtd->infile,
|
||
&mtd->unknown_mode_attr);
|
||
add_condition_to_rtx (x, v->string);
|
||
if (v != macro->values)
|
||
{
|
||
/* Insert a new EXPR_LIST node after ELEM and put the
|
||
new expansion there. */
|
||
new_elem = rtx_alloc (EXPR_LIST);
|
||
XEXP (new_elem, 1) = XEXP (elem, 1);
|
||
XEXP (elem, 1) = new_elem;
|
||
elem = new_elem;
|
||
}
|
||
XEXP (elem, 0) = x;
|
||
}
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/* Add a new "mapping" structure to hashtable TABLE. NAME is the name
|
||
of the mapping, GROUP is the group to which it belongs, and INFILE
|
||
is the file that defined the mapping. */
|
||
|
||
static struct mapping *
|
||
add_mapping (struct macro_group *group, htab_t table,
|
||
const char *name, FILE *infile)
|
||
{
|
||
struct mapping *m;
|
||
void **slot;
|
||
|
||
m = XNEW (struct mapping);
|
||
m->name = xstrdup (name);
|
||
m->group = group;
|
||
m->index = htab_elements (table);
|
||
m->values = 0;
|
||
|
||
slot = htab_find_slot (table, m, INSERT);
|
||
if (*slot != 0)
|
||
fatal_with_file_and_line (infile, "`%s' already defined", name);
|
||
|
||
*slot = m;
|
||
return m;
|
||
}
|
||
|
||
/* Add the pair (NUMBER, STRING) to a list of map_value structures.
|
||
END_PTR points to the current null terminator for the list; return
|
||
a pointer the new null terminator. */
|
||
|
||
static struct map_value **
|
||
add_map_value (struct map_value **end_ptr, int number, const char *string)
|
||
{
|
||
struct map_value *value;
|
||
|
||
value = XNEW (struct map_value);
|
||
value->next = 0;
|
||
value->number = number;
|
||
value->string = string;
|
||
|
||
*end_ptr = value;
|
||
return &value->next;
|
||
}
|
||
|
||
/* Do one-time initialization of the mode and code attributes. */
|
||
|
||
static void
|
||
initialize_macros (void)
|
||
{
|
||
struct mapping *lower, *upper;
|
||
struct map_value **lower_ptr, **upper_ptr;
|
||
char *copy, *p;
|
||
int i;
|
||
|
||
modes.attrs = htab_create (13, def_hash, def_name_eq_p, 0);
|
||
modes.macros = htab_create (13, def_hash, def_name_eq_p, 0);
|
||
modes.num_builtins = MAX_MACHINE_MODE;
|
||
modes.find_builtin = find_mode;
|
||
modes.uses_macro_p = uses_mode_macro_p;
|
||
modes.apply_macro = apply_mode_macro;
|
||
|
||
codes.attrs = htab_create (13, def_hash, def_name_eq_p, 0);
|
||
codes.macros = htab_create (13, def_hash, def_name_eq_p, 0);
|
||
codes.num_builtins = NUM_RTX_CODE;
|
||
codes.find_builtin = find_code;
|
||
codes.uses_macro_p = uses_code_macro_p;
|
||
codes.apply_macro = apply_code_macro;
|
||
|
||
lower = add_mapping (&modes, modes.attrs, "mode", 0);
|
||
upper = add_mapping (&modes, modes.attrs, "MODE", 0);
|
||
lower_ptr = &lower->values;
|
||
upper_ptr = &upper->values;
|
||
for (i = 0; i < MAX_MACHINE_MODE; i++)
|
||
{
|
||
copy = xstrdup (GET_MODE_NAME (i));
|
||
for (p = copy; *p != 0; p++)
|
||
*p = TOLOWER (*p);
|
||
|
||
upper_ptr = add_map_value (upper_ptr, i, GET_MODE_NAME (i));
|
||
lower_ptr = add_map_value (lower_ptr, i, copy);
|
||
}
|
||
|
||
lower = add_mapping (&codes, codes.attrs, "code", 0);
|
||
upper = add_mapping (&codes, codes.attrs, "CODE", 0);
|
||
lower_ptr = &lower->values;
|
||
upper_ptr = &upper->values;
|
||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||
{
|
||
copy = xstrdup (GET_RTX_NAME (i));
|
||
for (p = copy; *p != 0; p++)
|
||
*p = TOUPPER (*p);
|
||
|
||
lower_ptr = add_map_value (lower_ptr, i, GET_RTX_NAME (i));
|
||
upper_ptr = add_map_value (upper_ptr, i, copy);
|
||
}
|
||
}
|
||
|
||
/* 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.
|
||
Tools such as genflags use this function. */
|
||
|
||
int
|
||
read_skip_spaces (FILE *infile)
|
||
{
|
||
int c;
|
||
|
||
while (1)
|
||
{
|
||
c = getc (infile);
|
||
switch (c)
|
||
{
|
||
case '\n':
|
||
read_rtx_lineno++;
|
||
break;
|
||
|
||
case ' ': case '\t': case '\f': case '\r':
|
||
break;
|
||
|
||
case ';':
|
||
do
|
||
c = getc (infile);
|
||
while (c != '\n' && c != EOF);
|
||
read_rtx_lineno++;
|
||
break;
|
||
|
||
case '/':
|
||
{
|
||
int prevc;
|
||
c = getc (infile);
|
||
if (c != '*')
|
||
fatal_expected_char (infile, '*', c);
|
||
|
||
prevc = 0;
|
||
while ((c = getc (infile)) && c != EOF)
|
||
{
|
||
if (c == '\n')
|
||
read_rtx_lineno++;
|
||
else if (prevc == '*' && c == '/')
|
||
break;
|
||
prevc = c;
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
return c;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Read an rtx code name into the buffer STR[].
|
||
It is terminated by any of the punctuation chars of rtx printed syntax. */
|
||
|
||
static void
|
||
read_name (char *str, FILE *infile)
|
||
{
|
||
char *p;
|
||
int c;
|
||
|
||
c = read_skip_spaces (infile);
|
||
|
||
p = str;
|
||
while (1)
|
||
{
|
||
if (c == ' ' || c == '\n' || c == '\t' || c == '\f' || c == '\r' || c == EOF)
|
||
break;
|
||
if (c == ':' || c == ')' || c == ']' || c == '"' || c == '/'
|
||
|| c == '(' || c == '[')
|
||
{
|
||
ungetc (c, infile);
|
||
break;
|
||
}
|
||
*p++ = c;
|
||
c = getc (infile);
|
||
}
|
||
if (p == str)
|
||
fatal_with_file_and_line (infile, "missing name or number");
|
||
if (c == '\n')
|
||
read_rtx_lineno++;
|
||
|
||
*p = 0;
|
||
|
||
if (md_constants)
|
||
{
|
||
/* Do constant expansion. */
|
||
struct md_constant *def;
|
||
|
||
p = str;
|
||
do
|
||
{
|
||
struct md_constant tmp_def;
|
||
|
||
tmp_def.name = p;
|
||
def = (struct md_constant *) htab_find (md_constants, &tmp_def);
|
||
if (def)
|
||
p = def->value;
|
||
} while (def);
|
||
if (p != str)
|
||
strcpy (str, p);
|
||
}
|
||
}
|
||
|
||
/* Subroutine of the string readers. Handles backslash escapes.
|
||
Caller has read the backslash, but not placed it into the obstack. */
|
||
static void
|
||
read_escape (FILE *infile)
|
||
{
|
||
int c = getc (infile);
|
||
|
||
switch (c)
|
||
{
|
||
/* Backslash-newline is replaced by nothing, as in C. */
|
||
case '\n':
|
||
read_rtx_lineno++;
|
||
return;
|
||
|
||
/* \" \' \\ are replaced by the second character. */
|
||
case '\\':
|
||
case '"':
|
||
case '\'':
|
||
break;
|
||
|
||
/* Standard C string escapes:
|
||
\a \b \f \n \r \t \v
|
||
\[0-7] \x
|
||
all are passed through to the output string unmolested.
|
||
In normal use these wind up in a string constant processed
|
||
by the C compiler, which will translate them appropriately.
|
||
We do not bother checking that \[0-7] are followed by up to
|
||
two octal digits, or that \x is followed by N hex digits.
|
||
\? \u \U are left out because they are not in traditional C. */
|
||
case 'a': case 'b': case 'f': case 'n': case 'r': case 't': case 'v':
|
||
case '0': case '1': case '2': case '3': case '4': case '5': case '6':
|
||
case '7': case 'x':
|
||
obstack_1grow (&string_obstack, '\\');
|
||
break;
|
||
|
||
/* \; makes stuff for a C string constant containing
|
||
newline and tab. */
|
||
case ';':
|
||
obstack_grow (&string_obstack, "\\n\\t", 4);
|
||
return;
|
||
|
||
/* pass anything else through, but issue a warning. */
|
||
default:
|
||
fprintf (stderr, "%s:%d: warning: unrecognized escape \\%c\n",
|
||
read_rtx_filename, read_rtx_lineno, c);
|
||
obstack_1grow (&string_obstack, '\\');
|
||
break;
|
||
}
|
||
|
||
obstack_1grow (&string_obstack, c);
|
||
}
|
||
|
||
|
||
/* Read a double-quoted string onto the obstack. Caller has scanned
|
||
the leading quote. */
|
||
static char *
|
||
read_quoted_string (FILE *infile)
|
||
{
|
||
int c;
|
||
|
||
while (1)
|
||
{
|
||
c = getc (infile); /* Read the string */
|
||
if (c == '\n')
|
||
read_rtx_lineno++;
|
||
else if (c == '\\')
|
||
{
|
||
read_escape (infile);
|
||
continue;
|
||
}
|
||
else if (c == '"' || c == EOF)
|
||
break;
|
||
|
||
obstack_1grow (&string_obstack, c);
|
||
}
|
||
|
||
obstack_1grow (&string_obstack, 0);
|
||
return XOBFINISH (&string_obstack, char *);
|
||
}
|
||
|
||
/* Read a braced string (a la Tcl) onto the string obstack. Caller
|
||
has scanned the leading brace. Note that unlike quoted strings,
|
||
the outermost braces _are_ included in the string constant. */
|
||
static char *
|
||
read_braced_string (FILE *infile)
|
||
{
|
||
int c;
|
||
int brace_depth = 1; /* caller-processed */
|
||
unsigned long starting_read_rtx_lineno = read_rtx_lineno;
|
||
|
||
obstack_1grow (&string_obstack, '{');
|
||
while (brace_depth)
|
||
{
|
||
c = getc (infile); /* Read the string */
|
||
|
||
if (c == '\n')
|
||
read_rtx_lineno++;
|
||
else if (c == '{')
|
||
brace_depth++;
|
||
else if (c == '}')
|
||
brace_depth--;
|
||
else if (c == '\\')
|
||
{
|
||
read_escape (infile);
|
||
continue;
|
||
}
|
||
else if (c == EOF)
|
||
fatal_with_file_and_line
|
||
(infile, "missing closing } for opening brace on line %lu",
|
||
starting_read_rtx_lineno);
|
||
|
||
obstack_1grow (&string_obstack, c);
|
||
}
|
||
|
||
obstack_1grow (&string_obstack, 0);
|
||
return XOBFINISH (&string_obstack, char *);
|
||
}
|
||
|
||
/* Read some kind of string constant. This is the high-level routine
|
||
used by read_rtx. It handles surrounding parentheses, leading star,
|
||
and dispatch to the appropriate string constant reader. */
|
||
|
||
static char *
|
||
read_string (FILE *infile, int star_if_braced)
|
||
{
|
||
char *stringbuf;
|
||
int saw_paren = 0;
|
||
int c, old_lineno;
|
||
|
||
c = read_skip_spaces (infile);
|
||
if (c == '(')
|
||
{
|
||
saw_paren = 1;
|
||
c = read_skip_spaces (infile);
|
||
}
|
||
|
||
old_lineno = read_rtx_lineno;
|
||
if (c == '"')
|
||
stringbuf = read_quoted_string (infile);
|
||
else if (c == '{')
|
||
{
|
||
if (star_if_braced)
|
||
obstack_1grow (&string_obstack, '*');
|
||
stringbuf = read_braced_string (infile);
|
||
}
|
||
else
|
||
fatal_with_file_and_line (infile, "expected `\"' or `{', found `%c'", c);
|
||
|
||
if (saw_paren)
|
||
{
|
||
c = read_skip_spaces (infile);
|
||
if (c != ')')
|
||
fatal_expected_char (infile, ')', c);
|
||
}
|
||
|
||
set_rtx_ptr_loc (stringbuf, read_rtx_filename, old_lineno);
|
||
return stringbuf;
|
||
}
|
||
|
||
/* Provide a version of a function to read a long long if the system does
|
||
not provide one. */
|
||
#if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_LONG && !defined(HAVE_ATOLL) && !defined(HAVE_ATOQ)
|
||
HOST_WIDE_INT atoll (const char *);
|
||
|
||
HOST_WIDE_INT
|
||
atoll (const char *p)
|
||
{
|
||
int neg = 0;
|
||
HOST_WIDE_INT tmp_wide;
|
||
|
||
while (ISSPACE (*p))
|
||
p++;
|
||
if (*p == '-')
|
||
neg = 1, p++;
|
||
else if (*p == '+')
|
||
p++;
|
||
|
||
tmp_wide = 0;
|
||
while (ISDIGIT (*p))
|
||
{
|
||
HOST_WIDE_INT new_wide = tmp_wide*10 + (*p - '0');
|
||
if (new_wide < tmp_wide)
|
||
{
|
||
/* Return INT_MAX equiv on overflow. */
|
||
tmp_wide = (~(unsigned HOST_WIDE_INT) 0) >> 1;
|
||
break;
|
||
}
|
||
tmp_wide = new_wide;
|
||
p++;
|
||
}
|
||
|
||
if (neg)
|
||
tmp_wide = -tmp_wide;
|
||
return tmp_wide;
|
||
}
|
||
#endif
|
||
|
||
/* Given an object that starts with a char * name field, return a hash
|
||
code for its name. */
|
||
static hashval_t
|
||
def_hash (const void *def)
|
||
{
|
||
unsigned result, i;
|
||
const char *string = *(const char *const *) def;
|
||
|
||
for (result = i = 0; *string++ != '\0'; i++)
|
||
result += ((unsigned char) *string << (i % CHAR_BIT));
|
||
return result;
|
||
}
|
||
|
||
/* Given two objects that start with char * name fields, return true if
|
||
they have the same name. */
|
||
static int
|
||
def_name_eq_p (const void *def1, const void *def2)
|
||
{
|
||
return ! strcmp (*(const char *const *) def1,
|
||
*(const char *const *) def2);
|
||
}
|
||
|
||
/* 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_constants directive,
|
||
starting with the optional space after the "define_constants". */
|
||
static void
|
||
read_constants (FILE *infile, char *tmp_char)
|
||
{
|
||
int c;
|
||
htab_t defs;
|
||
|
||
c = read_skip_spaces (infile);
|
||
if (c != '[')
|
||
fatal_expected_char (infile, '[', c);
|
||
defs = md_constants;
|
||
if (! defs)
|
||
defs = htab_create (32, def_hash, def_name_eq_p, (htab_del) 0);
|
||
/* Disable constant expansion during definition processing. */
|
||
md_constants = 0;
|
||
while ( (c = read_skip_spaces (infile)) != ']')
|
||
{
|
||
struct md_constant *def;
|
||
void **entry_ptr;
|
||
|
||
if (c != '(')
|
||
fatal_expected_char (infile, '(', c);
|
||
def = XNEW (struct md_constant);
|
||
def->name = tmp_char;
|
||
read_name (tmp_char, infile);
|
||
entry_ptr = htab_find_slot (defs, def, INSERT);
|
||
if (! *entry_ptr)
|
||
def->name = xstrdup (tmp_char);
|
||
c = read_skip_spaces (infile);
|
||
ungetc (c, infile);
|
||
read_name (tmp_char, infile);
|
||
if (! *entry_ptr)
|
||
{
|
||
def->value = xstrdup (tmp_char);
|
||
*entry_ptr = def;
|
||
}
|
||
else
|
||
{
|
||
def = (struct md_constant *) *entry_ptr;
|
||
if (strcmp (def->value, tmp_char))
|
||
fatal_with_file_and_line (infile,
|
||
"redefinition of %s, was %s, now %s",
|
||
def->name, def->value, tmp_char);
|
||
}
|
||
c = read_skip_spaces (infile);
|
||
if (c != ')')
|
||
fatal_expected_char (infile, ')', c);
|
||
}
|
||
md_constants = defs;
|
||
c = read_skip_spaces (infile);
|
||
if (c != ')')
|
||
fatal_expected_char (infile, ')', c);
|
||
}
|
||
|
||
/* For every constant definition, call CALLBACK with two arguments:
|
||
a pointer a pointer to the constant definition and INFO.
|
||
Stops when CALLBACK returns zero. */
|
||
void
|
||
traverse_md_constants (htab_trav callback, void *info)
|
||
{
|
||
if (md_constants)
|
||
htab_traverse (md_constants, callback, info);
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
const char *cp;
|
||
int valid = 1;
|
||
|
||
cp = string;
|
||
while (*cp && ISSPACE (*cp))
|
||
cp++;
|
||
if (*cp == '-' || *cp == '+')
|
||
cp++;
|
||
if (*cp == 0)
|
||
valid = 0;
|
||
for (; *cp; cp++)
|
||
if (! ISDIGIT (*cp))
|
||
valid = 0;
|
||
if (!valid)
|
||
fatal_with_file_and_line (infile, "invalid decimal constant \"%s\"\n", string);
|
||
}
|
||
|
||
/* Search GROUP for a mode or code called NAME and return its numerical
|
||
identifier. INFILE is the file that contained NAME. */
|
||
|
||
static int
|
||
find_macro (struct macro_group *group, const char *name, FILE *infile)
|
||
{
|
||
struct mapping *m;
|
||
|
||
m = (struct mapping *) htab_find (group->macros, &name);
|
||
if (m != 0)
|
||
return m->index + group->num_builtins;
|
||
return group->find_builtin (name, infile);
|
||
}
|
||
|
||
/* Finish reading a declaration of the form:
|
||
|
||
(define... <name> [<value1> ... <valuen>])
|
||
|
||
from INFILE, where each <valuei> is either a bare symbol name or a
|
||
"(<name> <string>)" pair. The "(define..." part has already been read.
|
||
|
||
Represent the declaration as a "mapping" structure; add it to TABLE
|
||
(which belongs to GROUP) and return it. */
|
||
|
||
static struct mapping *
|
||
read_mapping (struct macro_group *group, htab_t table, FILE *infile)
|
||
{
|
||
char tmp_char[256];
|
||
struct mapping *m;
|
||
struct map_value **end_ptr;
|
||
const char *string;
|
||
int number, c;
|
||
|
||
/* Read the mapping name and create a structure for it. */
|
||
read_name (tmp_char, infile);
|
||
m = add_mapping (group, table, tmp_char, infile);
|
||
|
||
c = read_skip_spaces (infile);
|
||
if (c != '[')
|
||
fatal_expected_char (infile, '[', c);
|
||
|
||
/* Read each value. */
|
||
end_ptr = &m->values;
|
||
c = read_skip_spaces (infile);
|
||
do
|
||
{
|
||
if (c != '(')
|
||
{
|
||
/* A bare symbol name that is implicitly paired to an
|
||
empty string. */
|
||
ungetc (c, infile);
|
||
read_name (tmp_char, infile);
|
||
string = "";
|
||
}
|
||
else
|
||
{
|
||
/* A "(name string)" pair. */
|
||
read_name (tmp_char, infile);
|
||
string = read_string (infile, false);
|
||
c = read_skip_spaces (infile);
|
||
if (c != ')')
|
||
fatal_expected_char (infile, ')', c);
|
||
}
|
||
number = group->find_builtin (tmp_char, infile);
|
||
end_ptr = add_map_value (end_ptr, number, string);
|
||
c = read_skip_spaces (infile);
|
||
}
|
||
while (c != ']');
|
||
|
||
c = read_skip_spaces (infile);
|
||
if (c != ')')
|
||
fatal_expected_char (infile, ')', c);
|
||
|
||
return m;
|
||
}
|
||
|
||
/* Check newly-created code macro MACRO to see whether every code has the
|
||
same format. Initialize the macro's entry in bellwether_codes. */
|
||
|
||
static void
|
||
check_code_macro (struct mapping *macro, FILE *infile)
|
||
{
|
||
struct map_value *v;
|
||
enum rtx_code bellwether;
|
||
|
||
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 "
|
||
"different rtx formats", macro->name);
|
||
|
||
bellwether_codes = XRESIZEVEC (enum rtx_code, bellwether_codes,
|
||
macro->index + 1);
|
||
bellwether_codes[macro->index] = bellwether;
|
||
}
|
||
|
||
/* Read an rtx in printed representation from INFILE and store its
|
||
core representation in *X. Also store the line number of the
|
||
opening '(' in *LINENO. Return true on success or false if the
|
||
end of file has been reached.
|
||
|
||
read_rtx is not used in the compiler proper, but rather in
|
||
the utilities gen*.c that construct C code from machine descriptions. */
|
||
|
||
bool
|
||
read_rtx (FILE *infile, rtx *x, int *lineno)
|
||
{
|
||
static rtx queue_head, queue_next;
|
||
static int queue_lineno;
|
||
int c;
|
||
|
||
/* Do one-time initialization. */
|
||
if (queue_head == 0)
|
||
{
|
||
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_lineno = read_rtx_lineno;
|
||
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;
|
||
|
||
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);
|
||
*lineno = queue_lineno;
|
||
queue_next = XEXP (queue_next, 1);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Subroutine of read_rtx that reads one construct from INFILE but
|
||
doesn't apply any macros. */
|
||
|
||
static rtx
|
||
read_rtx_1 (FILE *infile, struct map_value **mode_maps)
|
||
{
|
||
int i;
|
||
RTX_CODE real_code, bellwether_code;
|
||
const char *format_ptr;
|
||
/* tmp_char is a buffer used for reading decimal integers
|
||
and names of rtx types and machine modes.
|
||
Therefore, 256 must be enough. */
|
||
char tmp_char[256];
|
||
rtx return_rtx;
|
||
int c;
|
||
int tmp_int;
|
||
HOST_WIDE_INT tmp_wide;
|
||
|
||
/* Linked list structure for making RTXs: */
|
||
struct rtx_list
|
||
{
|
||
struct rtx_list *next;
|
||
rtx value; /* Value of this node. */
|
||
};
|
||
|
||
again:
|
||
c = read_skip_spaces (infile); /* Should be open paren. */
|
||
|
||
if (c == EOF)
|
||
return 0;
|
||
|
||
if (c != '(')
|
||
fatal_expected_char (infile, '(', c);
|
||
|
||
read_name (tmp_char, infile);
|
||
if (strcmp (tmp_char, "nil") == 0)
|
||
{
|
||
/* (nil) stands for an expression that isn't there. */
|
||
c = read_skip_spaces (infile);
|
||
if (c != ')')
|
||
fatal_expected_char (infile, ')', c);
|
||
return 0;
|
||
}
|
||
if (strcmp (tmp_char, "define_constants") == 0)
|
||
{
|
||
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);
|
||
goto again;
|
||
}
|
||
if (strcmp (tmp_char, "define_mode_macro") == 0)
|
||
{
|
||
read_mapping (&modes, modes.macros, infile);
|
||
goto again;
|
||
}
|
||
if (strcmp (tmp_char, "define_code_attr") == 0)
|
||
{
|
||
read_mapping (&codes, codes.attrs, infile);
|
||
goto again;
|
||
}
|
||
if (strcmp (tmp_char, "define_code_macro") == 0)
|
||
{
|
||
check_code_macro (read_mapping (&codes, codes.macros, infile), infile);
|
||
goto again;
|
||
}
|
||
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. */
|
||
return_rtx = rtx_alloc (bellwether_code);
|
||
format_ptr = GET_RTX_FORMAT (bellwether_code);
|
||
PUT_CODE (return_rtx, real_code);
|
||
|
||
/* If what follows is `: mode ', read it and
|
||
store the mode in the rtx. */
|
||
|
||
i = read_skip_spaces (infile);
|
||
if (i == ':')
|
||
{
|
||
unsigned int mode;
|
||
|
||
read_name (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);
|
||
|
||
for (i = 0; format_ptr[i] != 0; i++)
|
||
switch (format_ptr[i])
|
||
{
|
||
/* 0 means a field for internal use only.
|
||
Don't expect it to be present in the input. */
|
||
case '0':
|
||
break;
|
||
|
||
case 'e':
|
||
case 'u':
|
||
XEXP (return_rtx, i) = read_rtx_1 (infile, mode_maps);
|
||
break;
|
||
|
||
case 'V':
|
||
/* 'V' is an optional vector: if a closeparen follows,
|
||
just store NULL for this element. */
|
||
c = read_skip_spaces (infile);
|
||
ungetc (c, infile);
|
||
if (c == ')')
|
||
{
|
||
XVEC (return_rtx, i) = 0;
|
||
break;
|
||
}
|
||
/* Now process the vector. */
|
||
|
||
case 'E':
|
||
{
|
||
/* Obstack to store scratch vector in. */
|
||
struct obstack vector_stack;
|
||
int list_counter = 0;
|
||
rtvec return_vec = NULL_RTVEC;
|
||
|
||
c = read_skip_spaces (infile);
|
||
if (c != '[')
|
||
fatal_expected_char (infile, '[', c);
|
||
|
||
/* Add expressions to a list, while keeping a count. */
|
||
obstack_init (&vector_stack);
|
||
while ((c = read_skip_spaces (infile)) && c != ']')
|
||
{
|
||
ungetc (c, infile);
|
||
list_counter++;
|
||
obstack_ptr_grow (&vector_stack, read_rtx_1 (infile, mode_maps));
|
||
}
|
||
if (list_counter > 0)
|
||
{
|
||
return_vec = rtvec_alloc (list_counter);
|
||
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 */
|
||
}
|
||
break;
|
||
|
||
case 'S':
|
||
case 'T':
|
||
case 's':
|
||
{
|
||
char *stringbuf;
|
||
int star_if_braced;
|
||
|
||
c = read_skip_spaces (infile);
|
||
ungetc (c, infile);
|
||
if (c == ')')
|
||
{
|
||
/* 'S' fields are optional and should be NULL if no string
|
||
was given. Also allow normal 's' and 'T' strings to be
|
||
omitted, treating them in the same way as empty strings. */
|
||
XSTR (return_rtx, i) = (format_ptr[i] == 'S' ? NULL : "");
|
||
break;
|
||
}
|
||
|
||
/* The output template slot of a DEFINE_INSN,
|
||
DEFINE_INSN_AND_SPLIT, or DEFINE_PEEPHOLE automatically
|
||
gets a star inserted as its first character, if it is
|
||
written with a brace block instead of a string constant. */
|
||
star_if_braced = (format_ptr[i] == 'T');
|
||
|
||
stringbuf = read_string (infile, star_if_braced);
|
||
|
||
/* For insn patterns, we want to provide a default name
|
||
based on the file and line, like "*foo.md:12", if the
|
||
given name is blank. These are only for define_insn and
|
||
define_insn_and_split, to aid debugging. */
|
||
if (*stringbuf == '\0'
|
||
&& i == 0
|
||
&& (GET_CODE (return_rtx) == DEFINE_INSN
|
||
|| GET_CODE (return_rtx) == DEFINE_INSN_AND_SPLIT))
|
||
{
|
||
char line_name[20];
|
||
const char *fn = (read_rtx_filename ? read_rtx_filename : "rtx");
|
||
const char *slash;
|
||
for (slash = fn; *slash; slash ++)
|
||
if (*slash == '/' || *slash == '\\' || *slash == ':')
|
||
fn = slash + 1;
|
||
obstack_1grow (&string_obstack, '*');
|
||
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 = XOBFINISH (&string_obstack, char *);
|
||
}
|
||
|
||
if (star_if_braced)
|
||
XTMPL (return_rtx, i) = stringbuf;
|
||
else
|
||
XSTR (return_rtx, i) = stringbuf;
|
||
}
|
||
break;
|
||
|
||
case 'w':
|
||
read_name (tmp_char, infile);
|
||
validate_const_int (infile, tmp_char);
|
||
#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
|
||
tmp_wide = atoi (tmp_char);
|
||
#else
|
||
#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
|
||
tmp_wide = atol (tmp_char);
|
||
#else
|
||
/* Prefer atoll over atoq, since the former is in the ISO C99 standard.
|
||
But prefer not to use our hand-rolled function above either. */
|
||
#if defined(HAVE_ATOLL) || !defined(HAVE_ATOQ)
|
||
tmp_wide = atoll (tmp_char);
|
||
#else
|
||
tmp_wide = atoq (tmp_char);
|
||
#endif
|
||
#endif
|
||
#endif
|
||
XWINT (return_rtx, i) = tmp_wide;
|
||
break;
|
||
|
||
case 'i':
|
||
case 'n':
|
||
read_name (tmp_char, infile);
|
||
validate_const_int (infile, tmp_char);
|
||
tmp_int = atoi (tmp_char);
|
||
XINT (return_rtx, i) = tmp_int;
|
||
break;
|
||
|
||
default:
|
||
gcc_unreachable ();
|
||
}
|
||
|
||
c = read_skip_spaces (infile);
|
||
if (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;
|
||
}
|