1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
26 #define obstack_chunk_alloc xmalloc
27 #define obstack_chunk_free free
35 const char *enumname, *name, *format;
38 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGIFY(ENUM), NAME, FORMAT },
40 struct rtx_definition defs[] =
42 #include "rtl.def" /* rtl expressions are documented here */
45 const char *formats[NUM_RTX_CODE];
47 static const char *type_from_format PROTO((char));
48 static const char *accessor_from_format PROTO((char));
49 static int special_format PROTO((const char *));
50 static int special_rtx PROTO((int));
51 static void find_formats PROTO((void));
52 static void gendecl PROTO((FILE *, const char *));
53 static void genmacro PROTO((FILE *, int));
54 static void gendef PROTO((FILE *, const char *));
55 static void genlegend PROTO((FILE *));
56 static void genheader PROTO((FILE *));
57 static void gencode PROTO((FILE *));
68 return "HOST_WIDE_INT";
82 accessor_from_format (c)
107 return (strchr (fmt, '*') != 0
108 || strchr (fmt, 'V') != 0
109 || strchr (fmt, 'S') != 0
110 || strchr (fmt, 'n') != 0);
117 return (strcmp (defs[idx].enumname, "CONST_INT") == 0
118 || strcmp (defs[idx].enumname, "REG") == 0);
126 for (i = 0; i < NUM_RTX_CODE; ++i)
130 if (special_format (defs[i].format))
133 for (f = formats; *f ; ++f)
134 if (!strcmp(*f, defs[i].format))
150 fprintf (f, "extern rtx gen_rtx_fmt_%s PROTO((RTX_CODE, enum machine_mode mode",
152 for (p = format, i = 0; *p ; ++p)
154 fprintf (f, ", %s arg%d", type_from_format (*p), i++);
155 fprintf (f, "));\n");
166 fprintf (f, "#define gen_rtx_%s%s(mode",
167 (special_rtx (idx) ? "raw_" : ""), defs[idx].enumname);
169 for (p = defs[idx].format, i = 0; *p ; ++p)
171 fprintf (f, ", arg%d", i++);
174 fprintf (f, "gen_rtx_fmt_%s(%s,(mode)", defs[idx].format, defs[idx].enumname);
175 for (p = defs[idx].format, i = 0; *p ; ++p)
177 fprintf (f, ",(arg%d)", i++);
189 fprintf (f, "rtx\ngen_rtx_fmt_%s (code, mode", format);
190 for (p = format, i = 0; *p ; ++p)
192 fprintf (f, ", arg%d", i++);
194 fprintf (f, ")\n RTX_CODE code;\n enum machine_mode mode;\n");
195 for (p = format, i = 0; *p ; ++p)
197 fprintf (f, " %s arg%d;\n", type_from_format (*p), i++);
199 /* See rtx_alloc in rtl.c for comments. */
201 fprintf (f, " rtx rt = obstack_alloc_rtx (sizeof (struct rtx_def) + %d * sizeof (rtunion));\n",
202 (int) strlen (format) - 1);
204 fprintf (f, " PUT_CODE (rt, code);\n");
205 fprintf (f, " PUT_MODE (rt, mode);\n");
207 for (p = format, i = j = 0; *p ; ++p, ++i)
210 fprintf (f, " %s (rt, %d) = arg%d;\n",
211 accessor_from_format (*p), i, j++);
214 fprintf (f, "\n return rt;\n}\n\n");
221 fprintf (f, "/* Generated automaticaly by the program `gengenrtl'\n");
222 fprintf (f, " from the RTL description file `rtl.def' */\n\n");
232 for (fmt = formats; *fmt; ++fmt)
237 for (i = 0; i < NUM_RTX_CODE; i++)
239 if (special_format (defs[i].format))
251 fputs ("#include \"config.h\"\n", f);
252 fputs ("#include \"system.h\"\n", f);
253 fputs ("#include \"obstack.h\"\n", f);
254 fputs ("#include \"rtl.h\"\n\n", f);
255 fputs ("extern struct obstack *rtl_obstack;\n\n", f);
256 fputs ("static rtx obstack_alloc_rtx PROTO((int length));\n", f);
257 fputs ("static rtx obstack_alloc_rtx (length)\n", f);
258 fputs (" register int length;\n{\n", f);
259 fputs (" rtx rt = (rtx) obstack_alloc (rtl_obstack, length);\n\n", f);
260 fputs (" if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(int))\n", f);
261 fputs (" *(int *)rt = 0;\n", f);
262 fputs (" else if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(HOST_WIDE_INT))\n", f);
263 fputs (" *(HOST_WIDE_INT *)rt = 0;\n", f);
264 fputs (" else\n", f);
265 fputs (" bzero((char *) rt, sizeof(struct rtx_def) - sizeof(rtunion));\n\n", f);
266 fputs (" return rt;\n}\n\n", f);
268 for (fmt = formats; *fmt; ++fmt)
272 #if defined(USE_C_ALLOCA) && !defined(__GNUC__)
277 char *tmp = (char *) malloc (nbytes);
281 fprintf (stderr, "can't allocate %d bytes (out of virtual memory)\n", nbytes);
282 exit (FATAL_EXIT_CODE);
287 #endif /* USE_C_ALLOCA && !__GNUC__ */
301 f = fopen (argv[1], "w");
311 f = fopen (argv[2], "w");