1315 lines
32 KiB
C
1315 lines
32 KiB
C
|
/* Support routines for the various generation passes.
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Copyright (C) 2000, 2001, 2002, 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
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License 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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#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 "errors.h"
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#include "hashtab.h"
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#include "gensupport.h"
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/* In case some macros used by files we include need it, define this here. */
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int target_flags;
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int insn_elision = 1;
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const char *in_fname;
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/* This callback will be invoked whenever an rtl include directive is
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processed. To be used for creation of the dependency file. */
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void (*include_callback) (const char *);
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static struct obstack obstack;
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struct obstack *rtl_obstack = &obstack;
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static int sequence_num;
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static int errors;
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static int predicable_default;
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static const char *predicable_true;
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static const char *predicable_false;
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static htab_t condition_table;
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static char *base_dir = NULL;
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/* We initially queue all patterns, process the define_insn and
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define_cond_exec patterns, then return them one at a time. */
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struct queue_elem
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{
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rtx data;
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const char *filename;
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int lineno;
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struct queue_elem *next;
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/* In a DEFINE_INSN that came from a DEFINE_INSN_AND_SPLIT, SPLIT
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points to the generated DEFINE_SPLIT. */
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struct queue_elem *split;
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};
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static struct queue_elem *define_attr_queue;
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static struct queue_elem **define_attr_tail = &define_attr_queue;
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static struct queue_elem *define_pred_queue;
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static struct queue_elem **define_pred_tail = &define_pred_queue;
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static struct queue_elem *define_insn_queue;
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static struct queue_elem **define_insn_tail = &define_insn_queue;
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static struct queue_elem *define_cond_exec_queue;
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static struct queue_elem **define_cond_exec_tail = &define_cond_exec_queue;
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static struct queue_elem *other_queue;
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static struct queue_elem **other_tail = &other_queue;
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static struct queue_elem *queue_pattern (rtx, struct queue_elem ***,
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const char *, int);
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/* Current maximum length of directory names in the search path
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for include files. (Altered as we get more of them.) */
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size_t max_include_len;
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struct file_name_list
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{
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struct file_name_list *next;
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const char *fname;
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};
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struct file_name_list *first_dir_md_include = 0; /* First dir to search */
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/* First dir to search for <file> */
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struct file_name_list *first_bracket_include = 0;
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struct file_name_list *last_dir_md_include = 0; /* Last in chain */
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static void remove_constraints (rtx);
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static void process_rtx (rtx, int);
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static int is_predicable (struct queue_elem *);
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static void identify_predicable_attribute (void);
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static int n_alternatives (const char *);
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static void collect_insn_data (rtx, int *, int *);
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static rtx alter_predicate_for_insn (rtx, int, int, int);
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static const char *alter_test_for_insn (struct queue_elem *,
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struct queue_elem *);
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static char *shift_output_template (char *, const char *, int);
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static const char *alter_output_for_insn (struct queue_elem *,
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struct queue_elem *,
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int, int);
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static void process_one_cond_exec (struct queue_elem *);
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static void process_define_cond_exec (void);
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static void process_include (rtx, int);
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static char *save_string (const char *, int);
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static void init_predicate_table (void);
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void
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message_with_line (int lineno, const char *msg, ...)
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{
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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, lineno);
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vfprintf (stderr, msg, ap);
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fputc ('\n', stderr);
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va_end (ap);
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}
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/* Make a version of gen_rtx_CONST_INT so that GEN_INT can be used in
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the gensupport programs. */
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rtx
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gen_rtx_CONST_INT (enum machine_mode ARG_UNUSED (mode),
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HOST_WIDE_INT arg)
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|
{
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rtx rt = rtx_alloc (CONST_INT);
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XWINT (rt, 0) = arg;
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return rt;
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}
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/* Queue PATTERN on LIST_TAIL. Return the address of the new queue
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element. */
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static struct queue_elem *
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queue_pattern (rtx pattern, struct queue_elem ***list_tail,
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const char *filename, int lineno)
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|||
|
{
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struct queue_elem *e = XNEW(struct queue_elem);
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e->data = pattern;
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e->filename = filename;
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e->lineno = lineno;
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e->next = NULL;
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e->split = NULL;
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**list_tail = e;
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*list_tail = &e->next;
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return e;
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|||
|
}
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|||
|
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|||
|
/* Recursively remove constraints from an rtx. */
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|||
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|||
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static void
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|||
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remove_constraints (rtx part)
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|
{
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int i, j;
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|||
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const char *format_ptr;
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if (part == 0)
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return;
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if (GET_CODE (part) == MATCH_OPERAND)
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XSTR (part, 2) = "";
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else if (GET_CODE (part) == MATCH_SCRATCH)
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XSTR (part, 1) = "";
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format_ptr = GET_RTX_FORMAT (GET_CODE (part));
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for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++)
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switch (*format_ptr++)
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{
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case 'e':
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case 'u':
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remove_constraints (XEXP (part, i));
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break;
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case 'E':
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if (XVEC (part, i) != NULL)
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for (j = 0; j < XVECLEN (part, i); j++)
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remove_constraints (XVECEXP (part, i, j));
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break;
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}
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}
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|||
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/* Process an include file assuming that it lives in gcc/config/{target}/
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if the include looks like (include "file"). */
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static void
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process_include (rtx desc, int lineno)
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{
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const char *filename = XSTR (desc, 0);
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const char *old_filename;
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int old_lineno;
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char *pathname;
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FILE *input_file;
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/* If specified file name is absolute, skip the include stack. */
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if (! IS_ABSOLUTE_PATH (filename))
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{
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struct file_name_list *stackp;
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/* Search directory path, trying to open the file. */
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for (stackp = first_dir_md_include; stackp; stackp = stackp->next)
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{
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static const char sep[2] = { DIR_SEPARATOR, '\0' };
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pathname = concat (stackp->fname, sep, filename, NULL);
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input_file = fopen (pathname, "r");
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if (input_file != NULL)
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goto success;
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free (pathname);
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}
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}
|
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if (base_dir)
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pathname = concat (base_dir, filename, NULL);
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else
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pathname = xstrdup (filename);
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input_file = fopen (pathname, "r");
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if (input_file == NULL)
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{
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free (pathname);
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message_with_line (lineno, "include file `%s' not found", filename);
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errors = 1;
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return;
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}
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success:
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|
|
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/* Save old cursor; setup new for the new file. Note that "lineno" the
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argument to this function is the beginning of the include statement,
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while read_rtx_lineno has already been advanced. */
|
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|
old_filename = read_rtx_filename;
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old_lineno = read_rtx_lineno;
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|
read_rtx_filename = pathname;
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read_rtx_lineno = 1;
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|
|
|||
|
if (include_callback)
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|||
|
include_callback (pathname);
|
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|
|
|||
|
/* Read the entire file. */
|
|||
|
while (read_rtx (input_file, &desc, &lineno))
|
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|
process_rtx (desc, lineno);
|
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|
|
|||
|
/* Do not free pathname. It is attached to the various rtx queue
|
|||
|
elements. */
|
|||
|
|
|||
|
read_rtx_filename = old_filename;
|
|||
|
read_rtx_lineno = old_lineno;
|
|||
|
|
|||
|
fclose (input_file);
|
|||
|
}
|
|||
|
|
|||
|
/* Process a top level rtx in some way, queuing as appropriate. */
|
|||
|
|
|||
|
static void
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|||
|
process_rtx (rtx desc, int lineno)
|
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|
{
|
|||
|
switch (GET_CODE (desc))
|
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|
{
|
|||
|
case DEFINE_INSN:
|
|||
|
queue_pattern (desc, &define_insn_tail, read_rtx_filename, lineno);
|
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|
break;
|
|||
|
|
|||
|
case DEFINE_COND_EXEC:
|
|||
|
queue_pattern (desc, &define_cond_exec_tail, read_rtx_filename, lineno);
|
|||
|
break;
|
|||
|
|
|||
|
case DEFINE_ATTR:
|
|||
|
queue_pattern (desc, &define_attr_tail, read_rtx_filename, lineno);
|
|||
|
break;
|
|||
|
|
|||
|
case DEFINE_PREDICATE:
|
|||
|
case DEFINE_SPECIAL_PREDICATE:
|
|||
|
queue_pattern (desc, &define_pred_tail, read_rtx_filename, lineno);
|
|||
|
break;
|
|||
|
|
|||
|
case INCLUDE:
|
|||
|
process_include (desc, lineno);
|
|||
|
break;
|
|||
|
|
|||
|
case DEFINE_INSN_AND_SPLIT:
|
|||
|
{
|
|||
|
const char *split_cond;
|
|||
|
rtx split;
|
|||
|
rtvec attr;
|
|||
|
int i;
|
|||
|
struct queue_elem *insn_elem;
|
|||
|
struct queue_elem *split_elem;
|
|||
|
|
|||
|
/* Create a split with values from the insn_and_split. */
|
|||
|
split = rtx_alloc (DEFINE_SPLIT);
|
|||
|
|
|||
|
i = XVECLEN (desc, 1);
|
|||
|
XVEC (split, 0) = rtvec_alloc (i);
|
|||
|
while (--i >= 0)
|
|||
|
{
|
|||
|
XVECEXP (split, 0, i) = copy_rtx (XVECEXP (desc, 1, i));
|
|||
|
remove_constraints (XVECEXP (split, 0, i));
|
|||
|
}
|
|||
|
|
|||
|
/* If the split condition starts with "&&", append it to the
|
|||
|
insn condition to create the new split condition. */
|
|||
|
split_cond = XSTR (desc, 4);
|
|||
|
if (split_cond[0] == '&' && split_cond[1] == '&')
|
|||
|
{
|
|||
|
copy_rtx_ptr_loc (split_cond + 2, split_cond);
|
|||
|
split_cond = join_c_conditions (XSTR (desc, 2), split_cond + 2);
|
|||
|
}
|
|||
|
XSTR (split, 1) = split_cond;
|
|||
|
XVEC (split, 2) = XVEC (desc, 5);
|
|||
|
XSTR (split, 3) = XSTR (desc, 6);
|
|||
|
|
|||
|
/* Fix up the DEFINE_INSN. */
|
|||
|
attr = XVEC (desc, 7);
|
|||
|
PUT_CODE (desc, DEFINE_INSN);
|
|||
|
XVEC (desc, 4) = attr;
|
|||
|
|
|||
|
/* Queue them. */
|
|||
|
insn_elem
|
|||
|
= queue_pattern (desc, &define_insn_tail, read_rtx_filename,
|
|||
|
lineno);
|
|||
|
split_elem
|
|||
|
= queue_pattern (split, &other_tail, read_rtx_filename, lineno);
|
|||
|
insn_elem->split = split_elem;
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
default:
|
|||
|
queue_pattern (desc, &other_tail, read_rtx_filename, lineno);
|
|||
|
break;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/* Return true if attribute PREDICABLE is true for ELEM, which holds
|
|||
|
a DEFINE_INSN. */
|
|||
|
|
|||
|
static int
|
|||
|
is_predicable (struct queue_elem *elem)
|
|||
|
{
|
|||
|
rtvec vec = XVEC (elem->data, 4);
|
|||
|
const char *value;
|
|||
|
int i;
|
|||
|
|
|||
|
if (! vec)
|
|||
|
return predicable_default;
|
|||
|
|
|||
|
for (i = GET_NUM_ELEM (vec) - 1; i >= 0; --i)
|
|||
|
{
|
|||
|
rtx sub = RTVEC_ELT (vec, i);
|
|||
|
switch (GET_CODE (sub))
|
|||
|
{
|
|||
|
case SET_ATTR:
|
|||
|
if (strcmp (XSTR (sub, 0), "predicable") == 0)
|
|||
|
{
|
|||
|
value = XSTR (sub, 1);
|
|||
|
goto found;
|
|||
|
}
|
|||
|
break;
|
|||
|
|
|||
|
case SET_ATTR_ALTERNATIVE:
|
|||
|
if (strcmp (XSTR (sub, 0), "predicable") == 0)
|
|||
|
{
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"multiple alternatives for `predicable'");
|
|||
|
errors = 1;
|
|||
|
return 0;
|
|||
|
}
|
|||
|
break;
|
|||
|
|
|||
|
case SET:
|
|||
|
if (GET_CODE (SET_DEST (sub)) != ATTR
|
|||
|
|| strcmp (XSTR (SET_DEST (sub), 0), "predicable") != 0)
|
|||
|
break;
|
|||
|
sub = SET_SRC (sub);
|
|||
|
if (GET_CODE (sub) == CONST_STRING)
|
|||
|
{
|
|||
|
value = XSTR (sub, 0);
|
|||
|
goto found;
|
|||
|
}
|
|||
|
|
|||
|
/* ??? It would be possible to handle this if we really tried.
|
|||
|
It's not easy though, and I'm not going to bother until it
|
|||
|
really proves necessary. */
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"non-constant value for `predicable'");
|
|||
|
errors = 1;
|
|||
|
return 0;
|
|||
|
|
|||
|
default:
|
|||
|
gcc_unreachable ();
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
return predicable_default;
|
|||
|
|
|||
|
found:
|
|||
|
/* Verify that predicability does not vary on the alternative. */
|
|||
|
/* ??? It should be possible to handle this by simply eliminating
|
|||
|
the non-predicable alternatives from the insn. FRV would like
|
|||
|
to do this. Delay this until we've got the basics solid. */
|
|||
|
if (strchr (value, ',') != NULL)
|
|||
|
{
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"multiple alternatives for `predicable'");
|
|||
|
errors = 1;
|
|||
|
return 0;
|
|||
|
}
|
|||
|
|
|||
|
/* Find out which value we're looking at. */
|
|||
|
if (strcmp (value, predicable_true) == 0)
|
|||
|
return 1;
|
|||
|
if (strcmp (value, predicable_false) == 0)
|
|||
|
return 0;
|
|||
|
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"unknown value `%s' for `predicable' attribute",
|
|||
|
value);
|
|||
|
errors = 1;
|
|||
|
return 0;
|
|||
|
}
|
|||
|
|
|||
|
/* Examine the attribute "predicable"; discover its boolean values
|
|||
|
and its default. */
|
|||
|
|
|||
|
static void
|
|||
|
identify_predicable_attribute (void)
|
|||
|
{
|
|||
|
struct queue_elem *elem;
|
|||
|
char *p_true, *p_false;
|
|||
|
const char *value;
|
|||
|
|
|||
|
/* Look for the DEFINE_ATTR for `predicable', which must exist. */
|
|||
|
for (elem = define_attr_queue; elem ; elem = elem->next)
|
|||
|
if (strcmp (XSTR (elem->data, 0), "predicable") == 0)
|
|||
|
goto found;
|
|||
|
|
|||
|
message_with_line (define_cond_exec_queue->lineno,
|
|||
|
"attribute `predicable' not defined");
|
|||
|
errors = 1;
|
|||
|
return;
|
|||
|
|
|||
|
found:
|
|||
|
value = XSTR (elem->data, 1);
|
|||
|
p_false = xstrdup (value);
|
|||
|
p_true = strchr (p_false, ',');
|
|||
|
if (p_true == NULL || strchr (++p_true, ',') != NULL)
|
|||
|
{
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"attribute `predicable' is not a boolean");
|
|||
|
errors = 1;
|
|||
|
return;
|
|||
|
}
|
|||
|
p_true[-1] = '\0';
|
|||
|
|
|||
|
predicable_true = p_true;
|
|||
|
predicable_false = p_false;
|
|||
|
|
|||
|
switch (GET_CODE (XEXP (elem->data, 2)))
|
|||
|
{
|
|||
|
case CONST_STRING:
|
|||
|
value = XSTR (XEXP (elem->data, 2), 0);
|
|||
|
break;
|
|||
|
|
|||
|
case CONST:
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"attribute `predicable' cannot be const");
|
|||
|
errors = 1;
|
|||
|
return;
|
|||
|
|
|||
|
default:
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"attribute `predicable' must have a constant default");
|
|||
|
errors = 1;
|
|||
|
return;
|
|||
|
}
|
|||
|
|
|||
|
if (strcmp (value, p_true) == 0)
|
|||
|
predicable_default = 1;
|
|||
|
else if (strcmp (value, p_false) == 0)
|
|||
|
predicable_default = 0;
|
|||
|
else
|
|||
|
{
|
|||
|
message_with_line (elem->lineno,
|
|||
|
"unknown value `%s' for `predicable' attribute",
|
|||
|
value);
|
|||
|
errors = 1;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/* Return the number of alternatives in constraint S. */
|
|||
|
|
|||
|
static int
|
|||
|
n_alternatives (const char *s)
|
|||
|
{
|
|||
|
int n = 1;
|
|||
|
|
|||
|
if (s)
|
|||
|
while (*s)
|
|||
|
n += (*s++ == ',');
|
|||
|
|
|||
|
return n;
|
|||
|
}
|
|||
|
|
|||
|
/* Determine how many alternatives there are in INSN, and how many
|
|||
|
operands. */
|
|||
|
|
|||
|
static void
|
|||
|
collect_insn_data (rtx pattern, int *palt, int *pmax)
|
|||
|
{
|
|||
|
const char *fmt;
|
|||
|
enum rtx_code code;
|
|||
|
int i, j, len;
|
|||
|
|
|||
|
code = GET_CODE (pattern);
|
|||
|
switch (code)
|
|||
|
{
|
|||
|
case MATCH_OPERAND:
|
|||
|
i = n_alternatives (XSTR (pattern, 2));
|
|||
|
*palt = (i > *palt ? i : *palt);
|
|||
|
/* Fall through. */
|
|||
|
|
|||
|
case MATCH_OPERATOR:
|
|||
|
case MATCH_SCRATCH:
|
|||
|
case MATCH_PARALLEL:
|
|||
|
i = XINT (pattern, 0);
|
|||
|
if (i > *pmax)
|
|||
|
*pmax = i;
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
fmt = GET_RTX_FORMAT (code);
|
|||
|
len = GET_RTX_LENGTH (code);
|
|||
|
for (i = 0; i < len; i++)
|
|||
|
{
|
|||
|
switch (fmt[i])
|
|||
|
{
|
|||
|
case 'e': case 'u':
|
|||
|
collect_insn_data (XEXP (pattern, i), palt, pmax);
|
|||
|
break;
|
|||
|
|
|||
|
case 'V':
|
|||
|
if (XVEC (pattern, i) == NULL)
|
|||
|
break;
|
|||
|
/* Fall through. */
|
|||
|
case 'E':
|
|||
|
for (j = XVECLEN (pattern, i) - 1; j >= 0; --j)
|
|||
|
collect_insn_data (XVECEXP (pattern, i, j), palt, pmax);
|
|||
|
break;
|
|||
|
|
|||
|
case 'i': case 'w': case '0': case 's': case 'S': case 'T':
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
gcc_unreachable ();
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
static rtx
|
|||
|
alter_predicate_for_insn (rtx pattern, int alt, int max_op, int lineno)
|
|||
|
{
|
|||
|
const char *fmt;
|
|||
|
enum rtx_code code;
|
|||
|
int i, j, len;
|
|||
|
|
|||
|
code = GET_CODE (pattern);
|
|||
|
switch (code)
|
|||
|
{
|
|||
|
case MATCH_OPERAND:
|
|||
|
{
|
|||
|
const char *c = XSTR (pattern, 2);
|
|||
|
|
|||
|
if (n_alternatives (c) != 1)
|
|||
|
{
|
|||
|
message_with_line (lineno,
|
|||
|
"too many alternatives for operand %d",
|
|||
|
XINT (pattern, 0));
|
|||
|
errors = 1;
|
|||
|
return NULL;
|
|||
|
}
|
|||
|
|
|||
|
/* Replicate C as needed to fill out ALT alternatives. */
|
|||
|
if (c && *c && alt > 1)
|
|||
|
{
|
|||
|
size_t c_len = strlen (c);
|
|||
|
size_t len = alt * (c_len + 1);
|
|||
|
char *new_c = XNEWVEC(char, len);
|
|||
|
|
|||
|
memcpy (new_c, c, c_len);
|
|||
|
for (i = 1; i < alt; ++i)
|
|||
|
{
|
|||
|
new_c[i * (c_len + 1) - 1] = ',';
|
|||
|
memcpy (&new_c[i * (c_len + 1)], c, c_len);
|
|||
|
}
|
|||
|
new_c[len - 1] = '\0';
|
|||
|
XSTR (pattern, 2) = new_c;
|
|||
|
}
|
|||
|
}
|
|||
|
/* Fall through. */
|
|||
|
|
|||
|
case MATCH_OPERATOR:
|
|||
|
case MATCH_SCRATCH:
|
|||
|
case MATCH_PARALLEL:
|
|||
|
XINT (pattern, 0) += max_op;
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
fmt = GET_RTX_FORMAT (code);
|
|||
|
len = GET_RTX_LENGTH (code);
|
|||
|
for (i = 0; i < len; i++)
|
|||
|
{
|
|||
|
rtx r;
|
|||
|
|
|||
|
switch (fmt[i])
|
|||
|
{
|
|||
|
case 'e': case 'u':
|
|||
|
r = alter_predicate_for_insn (XEXP (pattern, i), alt,
|
|||
|
max_op, lineno);
|
|||
|
if (r == NULL)
|
|||
|
return r;
|
|||
|
break;
|
|||
|
|
|||
|
case 'E':
|
|||
|
for (j = XVECLEN (pattern, i) - 1; j >= 0; --j)
|
|||
|
{
|
|||
|
r = alter_predicate_for_insn (XVECEXP (pattern, i, j),
|
|||
|
alt, max_op, lineno);
|
|||
|
if (r == NULL)
|
|||
|
return r;
|
|||
|
}
|
|||
|
break;
|
|||
|
|
|||
|
case 'i': case 'w': case '0': case 's':
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
gcc_unreachable ();
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
return pattern;
|
|||
|
}
|
|||
|
|
|||
|
static const char *
|
|||
|
alter_test_for_insn (struct queue_elem *ce_elem,
|
|||
|
struct queue_elem *insn_elem)
|
|||
|
{
|
|||
|
return join_c_conditions (XSTR (ce_elem->data, 1),
|
|||
|
XSTR (insn_elem->data, 2));
|
|||
|
}
|
|||
|
|
|||
|
/* Adjust all of the operand numbers in SRC to match the shift they'll
|
|||
|
get from an operand displacement of DISP. Return a pointer after the
|
|||
|
adjusted string. */
|
|||
|
|
|||
|
static char *
|
|||
|
shift_output_template (char *dest, const char *src, int disp)
|
|||
|
{
|
|||
|
while (*src)
|
|||
|
{
|
|||
|
char c = *src++;
|
|||
|
*dest++ = c;
|
|||
|
if (c == '%')
|
|||
|
{
|
|||
|
c = *src++;
|
|||
|
if (ISDIGIT ((unsigned char) c))
|
|||
|
c += disp;
|
|||
|
else if (ISALPHA (c))
|
|||
|
{
|
|||
|
*dest++ = c;
|
|||
|
c = *src++ + disp;
|
|||
|
}
|
|||
|
*dest++ = c;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
return dest;
|
|||
|
}
|
|||
|
|
|||
|
static const char *
|
|||
|
alter_output_for_insn (struct queue_elem *ce_elem,
|
|||
|
struct queue_elem *insn_elem,
|
|||
|
int alt, int max_op)
|
|||
|
{
|
|||
|
const char *ce_out, *insn_out;
|
|||
|
char *result, *p;
|
|||
|
size_t len, ce_len, insn_len;
|
|||
|
|
|||
|
/* ??? Could coordinate with genoutput to not duplicate code here. */
|
|||
|
|
|||
|
ce_out = XSTR (ce_elem->data, 2);
|
|||
|
insn_out = XTMPL (insn_elem->data, 3);
|
|||
|
if (!ce_out || *ce_out == '\0')
|
|||
|
return insn_out;
|
|||
|
|
|||
|
ce_len = strlen (ce_out);
|
|||
|
insn_len = strlen (insn_out);
|
|||
|
|
|||
|
if (*insn_out == '*')
|
|||
|
/* You must take care of the predicate yourself. */
|
|||
|
return insn_out;
|
|||
|
|
|||
|
if (*insn_out == '@')
|
|||
|
{
|
|||
|
len = (ce_len + 1) * alt + insn_len + 1;
|
|||
|
p = result = XNEWVEC(char, len);
|
|||
|
|
|||
|
do
|
|||
|
{
|
|||
|
do
|
|||
|
*p++ = *insn_out++;
|
|||
|
while (ISSPACE ((unsigned char) *insn_out));
|
|||
|
|
|||
|
if (*insn_out != '#')
|
|||
|
{
|
|||
|
p = shift_output_template (p, ce_out, max_op);
|
|||
|
*p++ = ' ';
|
|||
|
}
|
|||
|
|
|||
|
do
|
|||
|
*p++ = *insn_out++;
|
|||
|
while (*insn_out && *insn_out != '\n');
|
|||
|
}
|
|||
|
while (*insn_out);
|
|||
|
*p = '\0';
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
len = ce_len + 1 + insn_len + 1;
|
|||
|
result = XNEWVEC (char, len);
|
|||
|
|
|||
|
p = shift_output_template (result, ce_out, max_op);
|
|||
|
*p++ = ' ';
|
|||
|
memcpy (p, insn_out, insn_len + 1);
|
|||
|
}
|
|||
|
|
|||
|
return result;
|
|||
|
}
|
|||
|
|
|||
|
/* Replicate insns as appropriate for the given DEFINE_COND_EXEC. */
|
|||
|
|
|||
|
static void
|
|||
|
process_one_cond_exec (struct queue_elem *ce_elem)
|
|||
|
{
|
|||
|
struct queue_elem *insn_elem;
|
|||
|
for (insn_elem = define_insn_queue; insn_elem ; insn_elem = insn_elem->next)
|
|||
|
{
|
|||
|
int alternatives, max_operand;
|
|||
|
rtx pred, insn, pattern, split;
|
|||
|
int i;
|
|||
|
|
|||
|
if (! is_predicable (insn_elem))
|
|||
|
continue;
|
|||
|
|
|||
|
alternatives = 1;
|
|||
|
max_operand = -1;
|
|||
|
collect_insn_data (insn_elem->data, &alternatives, &max_operand);
|
|||
|
max_operand += 1;
|
|||
|
|
|||
|
if (XVECLEN (ce_elem->data, 0) != 1)
|
|||
|
{
|
|||
|
message_with_line (ce_elem->lineno,
|
|||
|
"too many patterns in predicate");
|
|||
|
errors = 1;
|
|||
|
return;
|
|||
|
}
|
|||
|
|
|||
|
pred = copy_rtx (XVECEXP (ce_elem->data, 0, 0));
|
|||
|
pred = alter_predicate_for_insn (pred, alternatives, max_operand,
|
|||
|
ce_elem->lineno);
|
|||
|
if (pred == NULL)
|
|||
|
return;
|
|||
|
|
|||
|
/* Construct a new pattern for the new insn. */
|
|||
|
insn = copy_rtx (insn_elem->data);
|
|||
|
XSTR (insn, 0) = "";
|
|||
|
pattern = rtx_alloc (COND_EXEC);
|
|||
|
XEXP (pattern, 0) = pred;
|
|||
|
if (XVECLEN (insn, 1) == 1)
|
|||
|
{
|
|||
|
XEXP (pattern, 1) = XVECEXP (insn, 1, 0);
|
|||
|
XVECEXP (insn, 1, 0) = pattern;
|
|||
|
PUT_NUM_ELEM (XVEC (insn, 1), 1);
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
XEXP (pattern, 1) = rtx_alloc (PARALLEL);
|
|||
|
XVEC (XEXP (pattern, 1), 0) = XVEC (insn, 1);
|
|||
|
XVEC (insn, 1) = rtvec_alloc (1);
|
|||
|
XVECEXP (insn, 1, 0) = pattern;
|
|||
|
}
|
|||
|
|
|||
|
XSTR (insn, 2) = alter_test_for_insn (ce_elem, insn_elem);
|
|||
|
XTMPL (insn, 3) = alter_output_for_insn (ce_elem, insn_elem,
|
|||
|
alternatives, max_operand);
|
|||
|
|
|||
|
/* ??? Set `predicable' to false. Not crucial since it's really
|
|||
|
only used here, and we won't reprocess this new pattern. */
|
|||
|
|
|||
|
/* Put the new pattern on the `other' list so that it
|
|||
|
(a) is not reprocessed by other define_cond_exec patterns
|
|||
|
(b) appears after all normal define_insn patterns.
|
|||
|
|
|||
|
??? B is debatable. If one has normal insns that match
|
|||
|
cond_exec patterns, they will be preferred over these
|
|||
|
generated patterns. Whether this matters in practice, or if
|
|||
|
it's a good thing, or whether we should thread these new
|
|||
|
patterns into the define_insn chain just after their generator
|
|||
|
is something we'll have to experiment with. */
|
|||
|
|
|||
|
queue_pattern (insn, &other_tail, insn_elem->filename,
|
|||
|
insn_elem->lineno);
|
|||
|
|
|||
|
if (!insn_elem->split)
|
|||
|
continue;
|
|||
|
|
|||
|
/* If the original insn came from a define_insn_and_split,
|
|||
|
generate a new split to handle the predicated insn. */
|
|||
|
split = copy_rtx (insn_elem->split->data);
|
|||
|
/* Predicate the pattern matched by the split. */
|
|||
|
pattern = rtx_alloc (COND_EXEC);
|
|||
|
XEXP (pattern, 0) = pred;
|
|||
|
if (XVECLEN (split, 0) == 1)
|
|||
|
{
|
|||
|
XEXP (pattern, 1) = XVECEXP (split, 0, 0);
|
|||
|
XVECEXP (split, 0, 0) = pattern;
|
|||
|
PUT_NUM_ELEM (XVEC (split, 0), 1);
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
XEXP (pattern, 1) = rtx_alloc (PARALLEL);
|
|||
|
XVEC (XEXP (pattern, 1), 0) = XVEC (split, 0);
|
|||
|
XVEC (split, 0) = rtvec_alloc (1);
|
|||
|
XVECEXP (split, 0, 0) = pattern;
|
|||
|
}
|
|||
|
/* Predicate all of the insns generated by the split. */
|
|||
|
for (i = 0; i < XVECLEN (split, 2); i++)
|
|||
|
{
|
|||
|
pattern = rtx_alloc (COND_EXEC);
|
|||
|
XEXP (pattern, 0) = pred;
|
|||
|
XEXP (pattern, 1) = XVECEXP (split, 2, i);
|
|||
|
XVECEXP (split, 2, i) = pattern;
|
|||
|
}
|
|||
|
/* Add the new split to the queue. */
|
|||
|
queue_pattern (split, &other_tail, read_rtx_filename,
|
|||
|
insn_elem->split->lineno);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/* If we have any DEFINE_COND_EXEC patterns, expand the DEFINE_INSN
|
|||
|
patterns appropriately. */
|
|||
|
|
|||
|
static void
|
|||
|
process_define_cond_exec (void)
|
|||
|
{
|
|||
|
struct queue_elem *elem;
|
|||
|
|
|||
|
identify_predicable_attribute ();
|
|||
|
if (errors)
|
|||
|
return;
|
|||
|
|
|||
|
for (elem = define_cond_exec_queue; elem ; elem = elem->next)
|
|||
|
process_one_cond_exec (elem);
|
|||
|
}
|
|||
|
|
|||
|
static char *
|
|||
|
save_string (const char *s, int len)
|
|||
|
{
|
|||
|
char *result = XNEWVEC (char, len + 1);
|
|||
|
|
|||
|
memcpy (result, s, len);
|
|||
|
result[len] = 0;
|
|||
|
return result;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
/* The entry point for initializing the reader. */
|
|||
|
|
|||
|
int
|
|||
|
init_md_reader_args_cb (int argc, char **argv, bool (*parse_opt)(const char *))
|
|||
|
{
|
|||
|
FILE *input_file;
|
|||
|
int i, lineno;
|
|||
|
size_t ix;
|
|||
|
char *lastsl;
|
|||
|
rtx desc;
|
|||
|
|
|||
|
/* Unlock the stdio streams. */
|
|||
|
unlock_std_streams ();
|
|||
|
|
|||
|
for (i = 1; i < argc; i++)
|
|||
|
{
|
|||
|
if (argv[i][0] != '-')
|
|||
|
{
|
|||
|
if (in_fname)
|
|||
|
fatal ("too many input files");
|
|||
|
|
|||
|
in_fname = argv[i];
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
int c = argv[i][1];
|
|||
|
switch (c)
|
|||
|
{
|
|||
|
case 'I': /* Add directory to path for includes. */
|
|||
|
{
|
|||
|
struct file_name_list *dirtmp;
|
|||
|
|
|||
|
dirtmp = XNEW (struct file_name_list);
|
|||
|
dirtmp->next = 0; /* New one goes on the end */
|
|||
|
if (first_dir_md_include == 0)
|
|||
|
first_dir_md_include = dirtmp;
|
|||
|
else
|
|||
|
last_dir_md_include->next = dirtmp;
|
|||
|
last_dir_md_include = dirtmp; /* Tail follows the last one */
|
|||
|
if (argv[i][1] == 'I' && argv[i][2] != 0)
|
|||
|
dirtmp->fname = argv[i] + 2;
|
|||
|
else if (i + 1 == argc)
|
|||
|
fatal ("directory name missing after -I option");
|
|||
|
else
|
|||
|
dirtmp->fname = argv[++i];
|
|||
|
if (strlen (dirtmp->fname) > max_include_len)
|
|||
|
max_include_len = strlen (dirtmp->fname);
|
|||
|
}
|
|||
|
break;
|
|||
|
default:
|
|||
|
/* The program may have provided a callback so it can
|
|||
|
accept its own options. */
|
|||
|
if (parse_opt && parse_opt (argv[i]))
|
|||
|
break;
|
|||
|
|
|||
|
fatal ("invalid option `%s'", argv[i]);
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
if (!in_fname)
|
|||
|
fatal ("no input file name");
|
|||
|
|
|||
|
lastsl = strrchr (in_fname, '/');
|
|||
|
if (lastsl != NULL)
|
|||
|
base_dir = save_string (in_fname, lastsl - in_fname + 1 );
|
|||
|
|
|||
|
read_rtx_filename = in_fname;
|
|||
|
input_file = fopen (in_fname, "r");
|
|||
|
if (input_file == 0)
|
|||
|
{
|
|||
|
perror (in_fname);
|
|||
|
return FATAL_EXIT_CODE;
|
|||
|
}
|
|||
|
|
|||
|
/* Initialize the table of insn conditions. */
|
|||
|
condition_table = htab_create (n_insn_conditions,
|
|||
|
hash_c_test, cmp_c_test, NULL);
|
|||
|
|
|||
|
for (ix = 0; ix < n_insn_conditions; ix++)
|
|||
|
*(htab_find_slot (condition_table, &insn_conditions[ix], INSERT))
|
|||
|
= (void *) &insn_conditions[ix];
|
|||
|
|
|||
|
init_predicate_table ();
|
|||
|
|
|||
|
obstack_init (rtl_obstack);
|
|||
|
errors = 0;
|
|||
|
sequence_num = 0;
|
|||
|
|
|||
|
/* Read the entire file. */
|
|||
|
while (read_rtx (input_file, &desc, &lineno))
|
|||
|
process_rtx (desc, lineno);
|
|||
|
fclose (input_file);
|
|||
|
|
|||
|
/* Process define_cond_exec patterns. */
|
|||
|
if (define_cond_exec_queue != NULL)
|
|||
|
process_define_cond_exec ();
|
|||
|
|
|||
|
return errors ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;
|
|||
|
}
|
|||
|
|
|||
|
/* Programs that don't have their own options can use this entry point
|
|||
|
instead. */
|
|||
|
int
|
|||
|
init_md_reader_args (int argc, char **argv)
|
|||
|
{
|
|||
|
return init_md_reader_args_cb (argc, argv, 0);
|
|||
|
}
|
|||
|
|
|||
|
/* The entry point for reading a single rtx from an md file. */
|
|||
|
|
|||
|
rtx
|
|||
|
read_md_rtx (int *lineno, int *seqnr)
|
|||
|
{
|
|||
|
struct queue_elem **queue, *elem;
|
|||
|
rtx desc;
|
|||
|
|
|||
|
discard:
|
|||
|
|
|||
|
/* Read all patterns from a given queue before moving on to the next. */
|
|||
|
if (define_attr_queue != NULL)
|
|||
|
queue = &define_attr_queue;
|
|||
|
else if (define_pred_queue != NULL)
|
|||
|
queue = &define_pred_queue;
|
|||
|
else if (define_insn_queue != NULL)
|
|||
|
queue = &define_insn_queue;
|
|||
|
else if (other_queue != NULL)
|
|||
|
queue = &other_queue;
|
|||
|
else
|
|||
|
return NULL_RTX;
|
|||
|
|
|||
|
elem = *queue;
|
|||
|
*queue = elem->next;
|
|||
|
desc = elem->data;
|
|||
|
read_rtx_filename = elem->filename;
|
|||
|
*lineno = elem->lineno;
|
|||
|
*seqnr = sequence_num;
|
|||
|
|
|||
|
free (elem);
|
|||
|
|
|||
|
/* Discard insn patterns which we know can never match (because
|
|||
|
their C test is provably always false). If insn_elision is
|
|||
|
false, our caller needs to see all the patterns. Note that the
|
|||
|
elided patterns are never counted by the sequence numbering; it
|
|||
|
it is the caller's responsibility, when insn_elision is false, not
|
|||
|
to use elided pattern numbers for anything. */
|
|||
|
switch (GET_CODE (desc))
|
|||
|
{
|
|||
|
case DEFINE_INSN:
|
|||
|
case DEFINE_EXPAND:
|
|||
|
if (maybe_eval_c_test (XSTR (desc, 2)) != 0)
|
|||
|
sequence_num++;
|
|||
|
else if (insn_elision)
|
|||
|
goto discard;
|
|||
|
break;
|
|||
|
|
|||
|
case DEFINE_SPLIT:
|
|||
|
case DEFINE_PEEPHOLE:
|
|||
|
case DEFINE_PEEPHOLE2:
|
|||
|
if (maybe_eval_c_test (XSTR (desc, 1)) != 0)
|
|||
|
sequence_num++;
|
|||
|
else if (insn_elision)
|
|||
|
goto discard;
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
return desc;
|
|||
|
}
|
|||
|
|
|||
|
/* Helper functions for insn elision. */
|
|||
|
|
|||
|
/* Compute a hash function of a c_test structure, which is keyed
|
|||
|
by its ->expr field. */
|
|||
|
hashval_t
|
|||
|
hash_c_test (const void *x)
|
|||
|
{
|
|||
|
const struct c_test *a = (const struct c_test *) x;
|
|||
|
const unsigned char *base, *s = (const unsigned char *) a->expr;
|
|||
|
hashval_t hash;
|
|||
|
unsigned char c;
|
|||
|
unsigned int len;
|
|||
|
|
|||
|
base = s;
|
|||
|
hash = 0;
|
|||
|
|
|||
|
while ((c = *s++) != '\0')
|
|||
|
{
|
|||
|
hash += c + (c << 17);
|
|||
|
hash ^= hash >> 2;
|
|||
|
}
|
|||
|
|
|||
|
len = s - base;
|
|||
|
hash += len + (len << 17);
|
|||
|
hash ^= hash >> 2;
|
|||
|
|
|||
|
return hash;
|
|||
|
}
|
|||
|
|
|||
|
/* Compare two c_test expression structures. */
|
|||
|
int
|
|||
|
cmp_c_test (const void *x, const void *y)
|
|||
|
{
|
|||
|
const struct c_test *a = (const struct c_test *) x;
|
|||
|
const struct c_test *b = (const struct c_test *) y;
|
|||
|
|
|||
|
return !strcmp (a->expr, b->expr);
|
|||
|
}
|
|||
|
|
|||
|
/* Given a string representing a C test expression, look it up in the
|
|||
|
condition_table and report whether or not its value is known
|
|||
|
at compile time. Returns a tristate: 1 for known true, 0 for
|
|||
|
known false, -1 for unknown. */
|
|||
|
int
|
|||
|
maybe_eval_c_test (const char *expr)
|
|||
|
{
|
|||
|
const struct c_test *test;
|
|||
|
struct c_test dummy;
|
|||
|
|
|||
|
if (expr[0] == 0)
|
|||
|
return 1;
|
|||
|
|
|||
|
if (insn_elision_unavailable)
|
|||
|
return -1;
|
|||
|
|
|||
|
dummy.expr = expr;
|
|||
|
test = (const struct c_test *)htab_find (condition_table, &dummy);
|
|||
|
gcc_assert (test);
|
|||
|
|
|||
|
return test->value;
|
|||
|
}
|
|||
|
|
|||
|
/* Given a string, return the number of comma-separated elements in it.
|
|||
|
Return 0 for the null string. */
|
|||
|
int
|
|||
|
n_comma_elts (const char *s)
|
|||
|
{
|
|||
|
int n;
|
|||
|
|
|||
|
if (*s == '\0')
|
|||
|
return 0;
|
|||
|
|
|||
|
for (n = 1; *s; s++)
|
|||
|
if (*s == ',')
|
|||
|
n++;
|
|||
|
|
|||
|
return n;
|
|||
|
}
|
|||
|
|
|||
|
/* Given a pointer to a (char *), return a pointer to the beginning of the
|
|||
|
next comma-separated element in the string. Advance the pointer given
|
|||
|
to the end of that element. Return NULL if at end of string. Caller
|
|||
|
is responsible for copying the string if necessary. White space between
|
|||
|
a comma and an element is ignored. */
|
|||
|
|
|||
|
const char *
|
|||
|
scan_comma_elt (const char **pstr)
|
|||
|
{
|
|||
|
const char *start;
|
|||
|
const char *p = *pstr;
|
|||
|
|
|||
|
if (*p == ',')
|
|||
|
p++;
|
|||
|
while (ISSPACE(*p))
|
|||
|
p++;
|
|||
|
|
|||
|
if (*p == '\0')
|
|||
|
return NULL;
|
|||
|
|
|||
|
start = p;
|
|||
|
|
|||
|
while (*p != ',' && *p != '\0')
|
|||
|
p++;
|
|||
|
|
|||
|
*pstr = p;
|
|||
|
return start;
|
|||
|
}
|
|||
|
|
|||
|
/* Helper functions for define_predicate and define_special_predicate
|
|||
|
processing. Shared between genrecog.c and genpreds.c. */
|
|||
|
|
|||
|
static htab_t predicate_table;
|
|||
|
struct pred_data *first_predicate;
|
|||
|
static struct pred_data **last_predicate = &first_predicate;
|
|||
|
|
|||
|
static hashval_t
|
|||
|
hash_struct_pred_data (const void *ptr)
|
|||
|
{
|
|||
|
return htab_hash_string (((const struct pred_data *)ptr)->name);
|
|||
|
}
|
|||
|
|
|||
|
static int
|
|||
|
eq_struct_pred_data (const void *a, const void *b)
|
|||
|
{
|
|||
|
return !strcmp (((const struct pred_data *)a)->name,
|
|||
|
((const struct pred_data *)b)->name);
|
|||
|
}
|
|||
|
|
|||
|
struct pred_data *
|
|||
|
lookup_predicate (const char *name)
|
|||
|
{
|
|||
|
struct pred_data key;
|
|||
|
key.name = name;
|
|||
|
return htab_find (predicate_table, &key);
|
|||
|
}
|
|||
|
|
|||
|
void
|
|||
|
add_predicate (struct pred_data *pred)
|
|||
|
{
|
|||
|
void **slot = htab_find_slot (predicate_table, pred, INSERT);
|
|||
|
if (*slot)
|
|||
|
{
|
|||
|
error ("duplicate predicate definition for '%s'", pred->name);
|
|||
|
return;
|
|||
|
}
|
|||
|
*slot = pred;
|
|||
|
*last_predicate = pred;
|
|||
|
last_predicate = &pred->next;
|
|||
|
}
|
|||
|
|
|||
|
/* This array gives the initial content of the predicate table. It
|
|||
|
has entries for all predicates defined in recog.c. */
|
|||
|
|
|||
|
struct old_pred_table
|
|||
|
{
|
|||
|
const char *name;
|
|||
|
RTX_CODE codes[NUM_RTX_CODE];
|
|||
|
};
|
|||
|
|
|||
|
static const struct old_pred_table old_preds[] = {
|
|||
|
{"general_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
|
|||
|
LABEL_REF, SUBREG, REG, MEM }},
|
|||
|
{"address_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
|
|||
|
LABEL_REF, SUBREG, REG, MEM,
|
|||
|
PLUS, MINUS, MULT}},
|
|||
|
{"register_operand", {SUBREG, REG}},
|
|||
|
{"pmode_register_operand", {SUBREG, REG}},
|
|||
|
{"scratch_operand", {SCRATCH, REG}},
|
|||
|
{"immediate_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
|
|||
|
LABEL_REF}},
|
|||
|
{"const_int_operand", {CONST_INT}},
|
|||
|
{"const_double_operand", {CONST_INT, CONST_DOUBLE}},
|
|||
|
{"nonimmediate_operand", {SUBREG, REG, MEM}},
|
|||
|
{"nonmemory_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
|
|||
|
LABEL_REF, SUBREG, REG}},
|
|||
|
{"push_operand", {MEM}},
|
|||
|
{"pop_operand", {MEM}},
|
|||
|
{"memory_operand", {SUBREG, MEM}},
|
|||
|
{"indirect_operand", {SUBREG, MEM}},
|
|||
|
{"comparison_operator", {EQ, NE, LE, LT, GE, GT, LEU, LTU, GEU, GTU,
|
|||
|
UNORDERED, ORDERED, UNEQ, UNGE, UNGT, UNLE,
|
|||
|
UNLT, LTGT}}
|
|||
|
};
|
|||
|
#define NUM_KNOWN_OLD_PREDS ARRAY_SIZE (old_preds)
|
|||
|
|
|||
|
/* This table gives the set of special predicates. It has entries for
|
|||
|
all special predicates defined in recog.c. */
|
|||
|
static const char *const old_special_pred_table[] = {
|
|||
|
"address_operand",
|
|||
|
"pmode_register_operand",
|
|||
|
};
|
|||
|
|
|||
|
#define NUM_OLD_SPECIAL_MODE_PREDS ARRAY_SIZE (old_special_pred_table)
|
|||
|
|
|||
|
/* Initialize the table of predicate definitions, starting with
|
|||
|
the information we have on generic predicates. */
|
|||
|
|
|||
|
static void
|
|||
|
init_predicate_table (void)
|
|||
|
{
|
|||
|
size_t i, j;
|
|||
|
struct pred_data *pred;
|
|||
|
|
|||
|
predicate_table = htab_create_alloc (37, hash_struct_pred_data,
|
|||
|
eq_struct_pred_data, 0,
|
|||
|
xcalloc, free);
|
|||
|
|
|||
|
for (i = 0; i < NUM_KNOWN_OLD_PREDS; i++)
|
|||
|
{
|
|||
|
pred = xcalloc (sizeof (struct pred_data), 1);
|
|||
|
pred->name = old_preds[i].name;
|
|||
|
|
|||
|
for (j = 0; old_preds[i].codes[j] != 0; j++)
|
|||
|
{
|
|||
|
enum rtx_code code = old_preds[i].codes[j];
|
|||
|
|
|||
|
pred->codes[code] = true;
|
|||
|
if (GET_RTX_CLASS (code) != RTX_CONST_OBJ)
|
|||
|
pred->allows_non_const = true;
|
|||
|
if (code != REG
|
|||
|
&& code != SUBREG
|
|||
|
&& code != MEM
|
|||
|
&& code != CONCAT
|
|||
|
&& code != PARALLEL
|
|||
|
&& code != STRICT_LOW_PART)
|
|||
|
pred->allows_non_lvalue = true;
|
|||
|
}
|
|||
|
if (j == 1)
|
|||
|
pred->singleton = old_preds[i].codes[0];
|
|||
|
|
|||
|
add_predicate (pred);
|
|||
|
}
|
|||
|
|
|||
|
for (i = 0; i < NUM_OLD_SPECIAL_MODE_PREDS; i++)
|
|||
|
{
|
|||
|
pred = lookup_predicate (old_special_pred_table[i]);
|
|||
|
if (!pred)
|
|||
|
{
|
|||
|
error ("old-style special predicate list refers "
|
|||
|
"to unknown predicate '%s'", old_special_pred_table[i]);
|
|||
|
continue;
|
|||
|
}
|
|||
|
pred->special = true;
|
|||
|
}
|
|||
|
}
|