mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
381 lines
9.2 KiB
C
381 lines
9.2 KiB
C
/* Generate from machine description:
|
||
- some #define configuration flags.
|
||
Copyright (C) 1987, 1991, 1997, 1998 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU CC.
|
||
|
||
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.
|
||
|
||
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.
|
||
|
||
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, 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
|
||
#include "hconfig.h"
|
||
#ifdef __STDC__
|
||
#include <stdarg.h>
|
||
#else
|
||
#include <varargs.h>
|
||
#endif
|
||
#include "system.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
|
||
|
||
/* Define this so we can link with print-rtl.o to get debug_rtx function. */
|
||
char **insn_name_ptr = 0;
|
||
|
||
/* flags to determine output of machine description dependent #define's. */
|
||
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_lo_sum_flag;
|
||
|
||
/* Maximum number of insns seen in a split. */
|
||
static int max_insns_per_split = 1;
|
||
|
||
static int clobbers_seen_this_insn;
|
||
static int dup_operands_seen_this_insn;
|
||
|
||
char *xmalloc PROTO((unsigned));
|
||
static void fatal PVPROTO ((char *, ...)) ATTRIBUTE_PRINTF_1;
|
||
void fancy_abort PROTO((void));
|
||
|
||
static void walk_insn_part PROTO((rtx, int, int));
|
||
static void gen_insn PROTO((rtx));
|
||
static void gen_expand PROTO((rtx));
|
||
static void gen_split PROTO((rtx));
|
||
static void gen_peephole PROTO((rtx));
|
||
|
||
/* 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 non-zero 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, non_pc_set_src)
|
||
rtx part;
|
||
int recog_p;
|
||
int non_pc_set_src;
|
||
{
|
||
register int i, j;
|
||
register RTX_CODE code;
|
||
register char *format_ptr;
|
||
|
||
if (part == 0)
|
||
return;
|
||
|
||
code = GET_CODE (part);
|
||
switch (code)
|
||
{
|
||
case CLOBBER:
|
||
clobbers_seen_this_insn++;
|
||
break;
|
||
|
||
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:
|
||
case MATCH_OPERATOR:
|
||
if (XINT (part, 0) > max_recog_operands)
|
||
max_recog_operands = XINT (part, 0);
|
||
/* Now scan the rtl's in the vector inside the MATCH_OPERATOR or
|
||
MATCH_PARALLEL. */
|
||
break;
|
||
|
||
case LABEL_REF:
|
||
if (GET_CODE (XEXP (part, 0)) == MATCH_OPERAND)
|
||
break;
|
||
return;
|
||
|
||
case MATCH_DUP:
|
||
++dup_operands_seen_this_insn;
|
||
if (XINT (part, 0) > max_recog_operands)
|
||
max_recog_operands = XINT (part, 0);
|
||
return;
|
||
|
||
case CC0:
|
||
if (recog_p)
|
||
have_cc0_flag = 1;
|
||
return;
|
||
|
||
case LO_SUM:
|
||
if (recog_p)
|
||
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 REG: case CONST_INT: case SYMBOL_REF:
|
||
case PC:
|
||
return;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
format_ptr = GET_RTX_FORMAT (GET_CODE (part));
|
||
|
||
for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++)
|
||
switch (*format_ptr++)
|
||
{
|
||
case 'e':
|
||
case 'u':
|
||
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, non_pc_set_src);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gen_insn (insn)
|
||
rtx insn;
|
||
{
|
||
int i;
|
||
|
||
/* Walk the insn pattern to gather the #define's status. */
|
||
clobbers_seen_this_insn = 0;
|
||
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, 0);
|
||
|
||
if (clobbers_seen_this_insn > max_clobbers_per_insn)
|
||
max_clobbers_per_insn = clobbers_seen_this_insn;
|
||
if (dup_operands_seen_this_insn > max_dup_operands)
|
||
max_dup_operands = dup_operands_seen_this_insn;
|
||
}
|
||
|
||
/* Similar but scan a define_expand. */
|
||
|
||
static void
|
||
gen_expand (insn)
|
||
rtx insn;
|
||
{
|
||
int i;
|
||
|
||
/* Walk the insn pattern to gather the #define's status. */
|
||
|
||
/* Note that we don't bother recording the number of MATCH_DUPs
|
||
that occur in a gen_expand, because only reload cares about that. */
|
||
if (XVEC (insn, 1) != 0)
|
||
for (i = 0; i < XVECLEN (insn, 1); i++)
|
||
{
|
||
/* Compute the maximum SETs and CLOBBERS
|
||
in any one of the sub-insns;
|
||
don't sum across all of them. */
|
||
clobbers_seen_this_insn = 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;
|
||
{
|
||
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, 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;
|
||
{
|
||
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, 0);
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
static void
|
||
fatal VPROTO ((char *format, ...))
|
||
{
|
||
#ifndef __STDC__
|
||
char *format;
|
||
#endif
|
||
va_list ap;
|
||
|
||
VA_START (ap, format);
|
||
|
||
#ifndef __STDC__
|
||
format = va_arg (ap, char *);
|
||
#endif
|
||
|
||
fprintf (stderr, "genconfig: ");
|
||
vfprintf (stderr, format, ap);
|
||
va_end (ap);
|
||
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. */
|
||
|
||
void
|
||
fancy_abort ()
|
||
{
|
||
fatal ("Internal gcc abort.");
|
||
}
|
||
|
||
int
|
||
main (argc, argv)
|
||
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);
|
||
}
|
||
|
||
init_rtl ();
|
||
|
||
printf ("/* Generated automatically by the program `genconfig'\n\
|
||
from the machine description file `md'. */\n\n");
|
||
|
||
/* Allow at least 10 operands for the sake of asm constructs. */
|
||
max_recog_operands = 9; /* We will add 1 later. */
|
||
max_dup_operands = 1;
|
||
|
||
/* Read the machine description. */
|
||
|
||
while (1)
|
||
{
|
||
c = read_skip_spaces (infile);
|
||
if (c == EOF)
|
||
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 + 1);
|
||
|
||
printf ("\n#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");
|
||
|
||
if (have_cc0_flag)
|
||
printf ("#define HAVE_cc0\n");
|
||
|
||
if (have_cmove_flag)
|
||
printf ("#define HAVE_conditional_move\n");
|
||
|
||
if (have_lo_sum_flag)
|
||
printf ("#define HAVE_lo_sum\n");
|
||
|
||
fflush (stdout);
|
||
exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
|
||
/* NOTREACHED */
|
||
return 0;
|
||
}
|