| /* Generate code to allocate RTL structures. |
| Copyright (C) 1997, 1998, 1999 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" |
| #include "system.h" |
| |
| #define NO_GENRTL_H |
| #include "rtl.h" |
| |
| |
| struct rtx_definition |
| { |
| const char *enumname, *name, *format; |
| }; |
| |
| #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGIFY(ENUM), NAME, FORMAT }, |
| |
| struct rtx_definition defs[] = |
| { |
| #include "rtl.def" /* rtl expressions are documented here */ |
| }; |
| |
| const char *formats[NUM_RTX_CODE]; |
| |
| static const char *type_from_format PROTO((int)); |
| static const char *accessor_from_format PROTO((int)); |
| static int special_format PROTO((const char *)); |
| static int special_rtx PROTO((int)); |
| static void find_formats PROTO((void)); |
| static void gendecl PROTO((FILE *, const char *)); |
| static void genmacro PROTO((FILE *, int)); |
| static void gendef PROTO((FILE *, const char *)); |
| static void genlegend PROTO((FILE *)); |
| static void genheader PROTO((FILE *)); |
| static void gencode PROTO((FILE *)); |
| |
| /* Decode a format letter into a C type string. */ |
| |
| static const char * |
| type_from_format (c) |
| int c; |
| { |
| switch (c) |
| { |
| case 'i': |
| return "int"; |
| case 'w': |
| return "HOST_WIDE_INT"; |
| case 's': |
| return "char *"; |
| case 'e': |
| case 'u': |
| return "rtx"; |
| case 'E': |
| return "rtvec"; |
| /* ?!? These should be bitmap and tree respectively, but those types |
| are not available in many of the files which include the output |
| of gengenrtl. |
| |
| These are only used in prototypes, so I think we can assume that |
| void * is useable. */ |
| case 'b': |
| return "void *"; |
| case 't': |
| return "void *"; |
| default: |
| abort (); |
| } |
| } |
| |
| /* Decode a format letter into the proper accessor function. */ |
| |
| static const char * |
| accessor_from_format (c) |
| int c; |
| { |
| switch (c) |
| { |
| case 'i': |
| return "XINT"; |
| case 'w': |
| return "XWINT"; |
| case 's': |
| return "XSTR"; |
| case 'e': |
| case 'u': |
| return "XEXP"; |
| case 'E': |
| return "XVEC"; |
| case 'b': |
| return "XBITMAP"; |
| case 't': |
| return "XTREE"; |
| default: |
| abort (); |
| } |
| } |
| |
| /* Return true if a format character doesn't need normal processing. */ |
| |
| static int |
| special_format (fmt) |
| const char *fmt; |
| { |
| return (strchr (fmt, '*') != 0 |
| || strchr (fmt, 'V') != 0 |
| || strchr (fmt, 'S') != 0 |
| || strchr (fmt, 'n') != 0); |
| } |
| |
| /* Return true if an rtx requires special processing. */ |
| |
| static int |
| special_rtx (idx) |
| int idx; |
| { |
| return (strcmp (defs[idx].enumname, "CONST_INT") == 0 |
| || strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0 |
| || strcmp (defs[idx].enumname, "REG") == 0 |
| || strcmp (defs[idx].enumname, "MEM") == 0); |
| } |
| |
| /* Fill `formats' with all unique format strings. */ |
| |
| static void |
| find_formats () |
| { |
| int i; |
| |
| for (i = 0; i < NUM_RTX_CODE; ++i) |
| { |
| const char **f; |
| |
| if (special_format (defs[i].format)) |
| continue; |
| |
| for (f = formats; *f ; ++f) |
| if (! strcmp (*f, defs[i].format)) |
| break; |
| |
| if (!*f) |
| *f = defs[i].format; |
| } |
| } |
| |
| /* Emit a prototype for the rtx generator for a format. */ |
| |
| static void |
| gendecl (f, format) |
| FILE *f; |
| const char *format; |
| { |
| const char *p; |
| int i; |
| |
| fprintf (f, "extern rtx gen_rtx_fmt_%s PROTO((RTX_CODE, enum machine_mode mode", |
| format); |
| for (p = format, i = 0; *p ; ++p) |
| if (*p != '0') |
| fprintf (f, ", %s arg%d", type_from_format (*p), i++); |
| fprintf (f, "));\n"); |
| } |
| |
| /* Emit a define mapping an rtx code to the generator for its format. */ |
| |
| static void |
| genmacro (f, idx) |
| FILE *f; |
| int idx; |
| { |
| const char *p; |
| int i; |
| |
| fprintf (f, "#define gen_rtx_%s%s(mode", |
| (special_rtx (idx) ? "raw_" : ""), defs[idx].enumname); |
| |
| for (p = defs[idx].format, i = 0; *p ; ++p) |
| if (*p != '0') |
| fprintf (f, ", arg%d", i++); |
| fprintf (f, ") "); |
| |
| fprintf (f, "gen_rtx_fmt_%s(%s,(mode)", defs[idx].format, defs[idx].enumname); |
| for (p = defs[idx].format, i = 0; *p ; ++p) |
| if (*p != '0') |
| fprintf (f, ",(arg%d)", i++); |
| fprintf (f, ")\n"); |
| } |
| |
| /* Emit the implementation for the rtx generator for a format. */ |
| |
| static void |
| gendef (f, format) |
| FILE *f; |
| const char *format; |
| { |
| const char *p; |
| int i, j; |
| |
| fprintf (f, "rtx\ngen_rtx_fmt_%s (code, mode", format); |
| for (p = format, i = 0; *p ; ++p) |
| if (*p != '0') |
| fprintf (f, ", arg%d", i++); |
| |
| fprintf (f, ")\n RTX_CODE code;\n enum machine_mode mode;\n"); |
| for (p = format, i = 0; *p ; ++p) |
| if (*p != '0') |
| fprintf (f, " %s arg%d;\n", type_from_format (*p), i++); |
| |
| /* See rtx_alloc in rtl.c for comments. */ |
| fprintf (f, "{\n"); |
| fprintf (f, " rtx rt = obstack_alloc_rtx (sizeof (struct rtx_def) + %d * sizeof (rtunion));\n", |
| (int) strlen (format) - 1); |
| |
| fprintf (f, " PUT_CODE (rt, code);\n"); |
| fprintf (f, " PUT_MODE (rt, mode);\n"); |
| |
| for (p = format, i = j = 0; *p ; ++p, ++i) |
| if (*p != '0') |
| { |
| fprintf (f, " %s (rt, %d) = arg%d;\n", |
| accessor_from_format (*p), i, j++); |
| } |
| |
| fprintf (f, "\n return rt;\n}\n\n"); |
| } |
| |
| /* Emit the `do not edit' banner. */ |
| |
| static void |
| genlegend (f) |
| FILE *f; |
| { |
| fputs ("/* Generated automaticaly by the program `gengenrtl'\n", f); |
| fputs (" from the RTL description file `rtl.def' */\n\n", f); |
| } |
| |
| /* Emit "genrtl.h". */ |
| |
| static void |
| genheader (f) |
| FILE *f; |
| { |
| int i; |
| const char **fmt; |
| |
| for (fmt = formats; *fmt; ++fmt) |
| gendecl (f, *fmt); |
| |
| fprintf (f, "\n"); |
| |
| for (i = 0; i < NUM_RTX_CODE; i++) |
| { |
| if (special_format (defs[i].format)) |
| continue; |
| genmacro (f, i); |
| } |
| } |
| |
| /* Emit "genrtl.c". */ |
| |
| static void |
| gencode (f) |
| FILE *f; |
| { |
| const char **fmt; |
| |
| fputs ("#include \"config.h\"\n", f); |
| fputs ("#include \"system.h\"\n", f); |
| fputs ("#include \"obstack.h\"\n", f); |
| fputs ("#include \"rtl.h\"\n\n", f); |
| fputs ("extern struct obstack *rtl_obstack;\n\n", f); |
| fputs ("static rtx obstack_alloc_rtx PROTO((int length));\n", f); |
| fputs ("static rtx obstack_alloc_rtx (length)\n", f); |
| fputs (" register int length;\n{\n", f); |
| fputs (" rtx rt = (rtx) obstack_alloc (rtl_obstack, length);\n\n", f); |
| fputs (" memset(rt, 0, sizeof(struct rtx_def) - sizeof(rtunion));\n\n", f); |
| fputs (" return rt;\n}\n\n", f); |
| |
| for (fmt = formats; *fmt; ++fmt) |
| gendef (f, *fmt); |
| } |
| |
| #if defined(USE_C_ALLOCA) |
| PTR |
| xmalloc (nbytes) |
| size_t nbytes; |
| { |
| register PTR tmp = (PTR) malloc (nbytes); |
| |
| if (!tmp) |
| { |
| fprintf (stderr, "can't allocate %d bytes (out of virtual memory)\n", |
| nbytes); |
| exit (FATAL_EXIT_CODE); |
| } |
| |
| return tmp; |
| } |
| #endif /* USE_C_ALLOCA */ |
| |
| int |
| main(argc, argv) |
| int argc; |
| char **argv; |
| { |
| FILE *f; |
| |
| if (argc != 3) |
| exit (1); |
| |
| find_formats (); |
| |
| f = fopen (argv[1], "w"); |
| if (f == NULL) |
| { |
| perror (argv[1]); |
| exit (1); |
| } |
| genlegend (f); |
| genheader (f); |
| fclose (f); |
| |
| f = fopen (argv[2], "w"); |
| if (f == NULL) |
| { |
| perror (argv[2]); |
| exit (1); |
| } |
| genlegend (f); |
| gencode (f); |
| fclose (f); |
| |
| exit (0); |
| } |