diff options
Diffstat (limited to 'gcc/genconfig.c')
| -rw-r--r-- | gcc/genconfig.c | 356 |
1 files changed, 0 insertions, 356 deletions
diff --git a/gcc/genconfig.c b/gcc/genconfig.c deleted file mode 100644 index 404534e120c..00000000000 --- a/gcc/genconfig.c +++ /dev/null @@ -1,356 +0,0 @@ -/* Generate from machine description: - - - some #define configuration flags. - Copyright (C) 1987, 1991 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 <stdio.h> -#include "hconfig.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 - -extern void free (); -extern rtx read_rtx (); - -/* 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 (); -static void fatal (); -void fancy_abort (); - -/* 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; - } - - 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 (s, a1, a2) - char *s; -{ - 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. */ - -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; -} |