/* Generate from machine description:
-
- some #define configuration flags.
- Copyright (C) 1987, 1991 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1991, 1997, 1998, 1999, 2000, 2003, 2004, 2007
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
-#include <stdio.h>
-#include "config.h"
+#include "bconfig.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
-#include "obstack.h"
-
-static struct obstack obstack;
-struct obstack *rtl_obstack = &obstack;
-
-#define obstack_chunk_alloc xmalloc
-#define obstack_chunk_free free
+#include "errors.h"
+#include "gensupport.h"
-extern void free ();
-extern rtx read_rtx ();
/* flags to determine output of machine description dependent #define's. */
-static int max_recog_operands;
-static int max_dup_operands;
+static int max_recog_operands; /* Largest operand number seen. */
+static int max_dup_operands; /* Largest number of match_dup in any insn. */
static int max_clobbers_per_insn;
-static int register_constraint_flag;
static int have_cc0_flag;
+static int have_cmove_flag;
+static int have_cond_exec_flag;
static int have_lo_sum_flag;
+static int have_peephole_flag;
+static int have_peephole2_flag;
/* Maximum number of insns seen in a split. */
static int max_insns_per_split = 1;
+/* Maximum number of input insns for peephole2. */
+static int max_insns_per_peep2;
+
static int clobbers_seen_this_insn;
static int dup_operands_seen_this_insn;
-char *xmalloc ();
-static void fatal ();
-void fancy_abort ();
+static void walk_insn_part (rtx, int, int);
+static void gen_insn (rtx);
+static void gen_expand (rtx);
+static void gen_split (rtx);
+static void gen_peephole (rtx);
+static void gen_peephole2 (rtx);
+
+/* RECOG_P will be nonzero if this pattern was seen in a context where it will
+ be used to recognize, rather than just generate an insn.
-/* RECOG_P will be non-zero if this pattern was seen in a context where it will
- be used to recognize, rather than just generate an insn. */
+ NON_PC_SET_SRC will be nonzero if this pattern was seen in a SET_SRC
+ of a SET whose destination is not (pc). */
static void
-walk_insn_part (part, recog_p)
- rtx part;
+walk_insn_part (rtx part, int recog_p, int non_pc_set_src)
{
- register int i, j;
- register RTX_CODE code;
- register char *format_ptr;
+ int i, j;
+ RTX_CODE code;
+ const char *format_ptr;
if (part == 0)
return;
case MATCH_OPERAND:
if (XINT (part, 0) > max_recog_operands)
max_recog_operands = XINT (part, 0);
- if (XSTR (part, 2) && *XSTR (part, 2))
- register_constraint_flag = 1;
return;
case MATCH_OP_DUP:
+ case MATCH_PAR_DUP:
++dup_operands_seen_this_insn;
case MATCH_SCRATCH:
case MATCH_PARALLEL:
break;
case LABEL_REF:
- if (GET_CODE (XEXP (part, 0)) == MATCH_OPERAND)
+ if (GET_CODE (XEXP (part, 0)) == MATCH_OPERAND
+ || GET_CODE (XEXP (part, 0)) == MATCH_DUP)
break;
return;
have_lo_sum_flag = 1;
return;
+ case SET:
+ walk_insn_part (SET_DEST (part), 0, recog_p);
+ walk_insn_part (SET_SRC (part), recog_p,
+ GET_CODE (SET_DEST (part)) != PC);
+ return;
+
+ case IF_THEN_ELSE:
+ /* Only consider this machine as having a conditional move if the
+ two arms of the IF_THEN_ELSE are both MATCH_OPERAND. Otherwise,
+ we have some specific IF_THEN_ELSE construct (like the doz
+ instruction on the RS/6000) that can't be used in the general
+ context we want it for. */
+
+ if (recog_p && non_pc_set_src
+ && GET_CODE (XEXP (part, 1)) == MATCH_OPERAND
+ && GET_CODE (XEXP (part, 2)) == MATCH_OPERAND)
+ have_cmove_flag = 1;
+ break;
+
+ case COND_EXEC:
+ if (recog_p)
+ have_cond_exec_flag = 1;
+ break;
+
case REG: case CONST_INT: case SYMBOL_REF:
case PC:
return;
+
+ default:
+ break;
}
format_ptr = GET_RTX_FORMAT (GET_CODE (part));
{
case 'e':
case 'u':
- walk_insn_part (XEXP (part, i), recog_p);
+ walk_insn_part (XEXP (part, i), recog_p, non_pc_set_src);
break;
case 'E':
if (XVEC (part, i) != NULL)
for (j = 0; j < XVECLEN (part, i); j++)
- walk_insn_part (XVECEXP (part, i, j), recog_p);
+ walk_insn_part (XVECEXP (part, i, j), recog_p, non_pc_set_src);
break;
}
}
static void
-gen_insn (insn)
- rtx insn;
+gen_insn (rtx insn)
{
int i;
dup_operands_seen_this_insn = 0;
if (XVEC (insn, 1) != 0)
for (i = 0; i < XVECLEN (insn, 1); i++)
- walk_insn_part (XVECEXP (insn, 1, i), 1);
+ walk_insn_part (XVECEXP (insn, 1, i), 1, 0);
if (clobbers_seen_this_insn > max_clobbers_per_insn)
max_clobbers_per_insn = clobbers_seen_this_insn;
/* Similar but scan a define_expand. */
static void
-gen_expand (insn)
- rtx insn;
+gen_expand (rtx insn)
{
int i;
don't sum across all of them. */
clobbers_seen_this_insn = 0;
- walk_insn_part (XVECEXP (insn, 1, i), 0);
+ walk_insn_part (XVECEXP (insn, 1, i), 0, 0);
if (clobbers_seen_this_insn > max_clobbers_per_insn)
max_clobbers_per_insn = clobbers_seen_this_insn;
/* Similar but scan a define_split. */
static void
-gen_split (split)
- rtx split;
+gen_split (rtx split)
{
int i;
/* Look through the patterns that are matched
to compute the maximum operand number. */
for (i = 0; i < XVECLEN (split, 0); i++)
- walk_insn_part (XVECEXP (split, 0, i), 1);
+ walk_insn_part (XVECEXP (split, 0, i), 1, 0);
/* Look at the number of insns this insn could split into. */
if (XVECLEN (split, 2) > max_insns_per_split)
max_insns_per_split = XVECLEN (split, 2);
}
static void
-gen_peephole (peep)
- rtx peep;
+gen_peephole (rtx peep)
{
int i;
/* Look through the patterns that are matched
to compute the maximum operand number. */
for (i = 0; i < XVECLEN (peep, 0); i++)
- walk_insn_part (XVECEXP (peep, 0, i), 1);
-}
-\f
-char *
-xmalloc (size)
- unsigned size;
-{
- register char *val = (char *) malloc (size);
-
- if (val == 0)
- fatal ("virtual memory exhausted");
-
- return val;
-}
-
-char *
-xrealloc (ptr, size)
- char *ptr;
- unsigned size;
-{
- char *result = (char *) realloc (ptr, size);
- if (!result)
- fatal ("virtual memory exhausted");
- return result;
+ walk_insn_part (XVECEXP (peep, 0, i), 1, 0);
}
static void
-fatal (s, a1, a2)
- char *s;
+gen_peephole2 (rtx peep)
{
- fprintf (stderr, "genconfig: ");
- fprintf (stderr, s, a1, a2);
- fprintf (stderr, "\n");
- exit (FATAL_EXIT_CODE);
-}
-
-/* More 'friendly' abort that prints the line and file.
- config.h can #define abort fancy_abort if you like that sort of thing. */
+ int i, n;
-void
-fancy_abort ()
-{
- fatal ("Internal gcc abort.");
+ /* Look through the patterns that are matched
+ to compute the maximum operand number. */
+ for (i = XVECLEN (peep, 0) - 1; i >= 0; --i)
+ walk_insn_part (XVECEXP (peep, 0, i), 1, 0);
+
+ /* Look at the number of insns this insn can be matched from. */
+ for (i = XVECLEN (peep, 0) - 1, n = 0; i >= 0; --i)
+ if (GET_CODE (XVECEXP (peep, 0, i)) != MATCH_DUP
+ && GET_CODE (XVECEXP (peep, 0, i)) != MATCH_SCRATCH)
+ n++;
+ if (n > max_insns_per_peep2)
+ max_insns_per_peep2 = n;
}
-\f
+
int
-main (argc, argv)
- int argc;
- char **argv;
+main (int argc, char **argv)
{
rtx desc;
- FILE *infile;
- register int c;
- obstack_init (rtl_obstack);
-
- if (argc <= 1)
- fatal ("No input file name.");
-
- infile = fopen (argv[1], "r");
- if (infile == 0)
- {
- perror (argv[1]);
- exit (FATAL_EXIT_CODE);
- }
+ progname = "genconfig";
- init_rtl ();
+ if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
+ return (FATAL_EXIT_CODE);
- printf ("/* Generated automatically by the program `genconfig'\n\
-from the machine description file `md'. */\n\n");
+ puts ("/* Generated automatically by the program `genconfig'");
+ puts (" from the machine description file `md'. */\n");
+ puts ("#ifndef GCC_INSN_CONFIG_H");
+ puts ("#define GCC_INSN_CONFIG_H\n");
- /* Allow at least 10 operands for the sake of asm constructs. */
- max_recog_operands = 10;
+ /* Allow at least 30 operands for the sake of asm constructs. */
+ /* ??? We *really* ought to reorganize things such that there
+ is no fixed upper bound. */
+ max_recog_operands = 29; /* We will add 1 later. */
max_dup_operands = 1;
/* Read the machine description. */
while (1)
{
- c = read_skip_spaces (infile);
- if (c == EOF)
+ int line_no, insn_code_number = 0;
+
+ desc = read_md_rtx (&line_no, &insn_code_number);
+ if (desc == NULL)
break;
- ungetc (c, infile);
-
- desc = read_rtx (infile);
- if (GET_CODE (desc) == DEFINE_INSN)
- gen_insn (desc);
- if (GET_CODE (desc) == DEFINE_EXPAND)
- gen_expand (desc);
- if (GET_CODE (desc) == DEFINE_SPLIT)
- gen_split (desc);
- if (GET_CODE (desc) == DEFINE_PEEPHOLE)
- gen_peephole (desc);
- }
- printf ("\n#define MAX_RECOG_OPERANDS %d\n", max_recog_operands);
+ switch (GET_CODE (desc))
+ {
+ case DEFINE_INSN:
+ gen_insn (desc);
+ break;
+
+ case DEFINE_EXPAND:
+ gen_expand (desc);
+ break;
+
+ case DEFINE_SPLIT:
+ gen_split (desc);
+ break;
+
+ case DEFINE_PEEPHOLE2:
+ have_peephole2_flag = 1;
+ gen_peephole2 (desc);
+ break;
+
+ case DEFINE_PEEPHOLE:
+ have_peephole_flag = 1;
+ gen_peephole (desc);
+ break;
+
+ default:
+ break;
+ }
+ }
- printf ("\n#define MAX_DUP_OPERANDS %d\n", max_dup_operands);
+ printf ("#define MAX_RECOG_OPERANDS %d\n", max_recog_operands + 1);
+ printf ("#define MAX_DUP_OPERANDS %d\n", max_dup_operands);
/* This is conditionally defined, in case the user writes code which emits
more splits than we can readily see (and knows s/he does it). */
- printf ("#ifndef MAX_INSNS_PER_SPLIT\n#define MAX_INSNS_PER_SPLIT %d\n#endif\n",
- max_insns_per_split);
-
- if (register_constraint_flag)
- printf ("#define REGISTER_CONSTRAINTS\n");
+ printf ("#ifndef MAX_INSNS_PER_SPLIT\n");
+ printf ("#define MAX_INSNS_PER_SPLIT %d\n", max_insns_per_split);
+ printf ("#endif\n");
if (have_cc0_flag)
- printf ("#define HAVE_cc0\n");
+ {
+ printf ("#define HAVE_cc0 1\n");
+ printf ("#define CC0_P(X) ((X) == cc0_rtx)\n");
+ }
+ else
+ {
+ /* We output CC0_P this way to make sure that X is declared
+ somewhere. */
+ printf ("#define CC0_P(X) ((X) ? 0 : 0)\n");
+ }
+
+ if (have_cmove_flag)
+ printf ("#define HAVE_conditional_move 1\n");
+
+ if (have_cond_exec_flag)
+ printf ("#define HAVE_conditional_execution 1\n");
if (have_lo_sum_flag)
- printf ("#define HAVE_lo_sum\n");
+ printf ("#define HAVE_lo_sum 1\n");
+
+ if (have_peephole_flag)
+ printf ("#define HAVE_peephole 1\n");
+
+ if (have_peephole2_flag)
+ {
+ printf ("#define HAVE_peephole2 1\n");
+ printf ("#define MAX_INSNS_PER_PEEP2 %d\n", max_insns_per_peep2);
+ }
+
+ puts("\n#endif /* GCC_INSN_CONFIG_H */");
+
+ if (ferror (stdout) || fflush (stdout) || fclose (stdout))
+ return FATAL_EXIT_CODE;
- fflush (stdout);
- exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
- /* NOTREACHED */
- return 0;
+ return SUCCESS_EXIT_CODE;
}
OSDN Git Service
