1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
33 const char *const enumname, *const name, *const format;
36 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGX(ENUM), NAME, FORMAT },
38 static const struct rtx_definition defs[] =
40 #include "rtl.def" /* rtl expressions are documented here */
43 static const char *formats[NUM_RTX_CODE];
45 static const char *type_from_format PARAMS ((int));
46 static const char *accessor_from_format PARAMS ((int));
47 static int special_format PARAMS ((const char *));
48 static int special_rtx PARAMS ((int));
49 static void find_formats PARAMS ((void));
50 static void gendecl PARAMS ((const char *));
51 static void genmacro PARAMS ((int));
52 static void gendef PARAMS ((const char *));
53 static void genlegend PARAMS ((void));
54 static void genheader PARAMS ((void));
55 static void gencode PARAMS ((void));
57 /* Decode a format letter into a C type string. */
69 return "HOST_WIDE_INT ";
72 return "const char *";
80 return "struct bitmap_head_def *"; /* bitmap - typedef not available */
82 return "union tree_node *"; /* tree - typedef not available */
88 /* Decode a format letter into the proper accessor function. */
91 accessor_from_format (c)
122 /* Return nonzero if we should ignore FMT, an RTL format, when making
123 the list of formats we write routines to create. */
129 return (strchr (fmt, '*') != 0
130 || strchr (fmt, 'V') != 0
131 || strchr (fmt, 'S') != 0
132 || strchr (fmt, 'n') != 0);
135 /* Return nonzero if the RTL code given by index IDX is one that we should not
136 generate a gen_RTX_FOO function foo (because that function is present
137 elsewhere in the compiler). */
143 return (strcmp (defs[idx].enumname, "CONST_INT") == 0
144 || strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0
145 || strcmp (defs[idx].enumname, "REG") == 0
146 || strcmp (defs[idx].enumname, "SUBREG") == 0
147 || strcmp (defs[idx].enumname, "MEM") == 0);
150 /* Place a list of all format specifiers we use into the array FORMAT. */
157 for (i = 0; i < NUM_RTX_CODE; i++)
161 if (special_format (defs[i].format))
164 for (f = formats; *f; f++)
165 if (! strcmp (*f, defs[i].format))
173 /* Write the declarations for the routine to allocate RTL with FORMAT. */
182 printf ("extern rtx gen_rtx_fmt_%s\tPARAMS ((RTX_CODE, ", format);
183 printf ("enum machine_mode mode");
185 /* Write each parameter that is needed and start a new line when the line
187 for (p = format, i = 0, pos = 75; *p != 0; p++)
190 int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9);
193 if (pos + ourlen > 76)
194 printf ("\n\t\t\t\t "), pos = 39;
196 printf (" %sarg%d", type_from_format (*p), i++);
203 /* Generate macros to generate RTL of code IDX using the functions we
213 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
214 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
216 printf ("#define gen_rtx_%s%s(MODE",
217 special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
219 for (p = defs[idx].format, i = 0; *p != 0; p++)
221 printf (", ARG%d", i++);
223 printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
224 defs[idx].format, defs[idx].enumname);
226 for (p = defs[idx].format, i = 0; *p != 0; p++)
228 printf (", (ARG%d)", i++);
233 /* Generate the code for the function to generate RTL whose
243 /* Start by writing the definition of the function name and the types
246 printf ("rtx\ngen_rtx_fmt_%s (code, mode", format);
247 for (p = format, i = 0; *p != 0; p++)
249 printf (", arg%d", i++);
251 puts (")\n RTX_CODE code;\n enum machine_mode mode;");
252 for (p = format, i = 0; *p != 0; p++)
254 printf (" %sarg%d;\n", type_from_format (*p), i++);
256 /* Now write out the body of the function itself, which allocates
257 the memory and initializes it. */
260 printf (" rt = ggc_alloc_rtx (%d);\n", (int) strlen (format));
262 puts (" memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));\n");
263 puts (" PUT_CODE (rt, code);");
264 puts (" PUT_MODE (rt, mode);");
266 for (p = format, i = j = 0; *p ; ++p, ++i)
268 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
270 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
272 puts ("\n return rt;\n}\n");
275 /* Generate the documentation header for files we write. */
280 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
283 /* Generate the text of the header file we make, genrtl.h. */
291 puts ("#ifndef GCC_GENRTL_H");
292 puts ("#define GCC_GENRTL_H\n");
294 for (fmt = formats; *fmt; ++fmt)
299 for (i = 0; i < NUM_RTX_CODE; i++)
300 if (! special_format (defs[i].format))
303 puts ("\n#endif /* GCC_GENRTL_H */");
306 /* Generate the text of the code file we write, genrtl.c. */
313 puts ("#include \"config.h\"");
314 puts ("#include \"system.h\"");
315 puts ("#include \"obstack.h\"");
316 puts ("#include \"rtl.h\"");
317 puts ("#include \"ggc.h\"\n");
318 puts ("extern struct obstack *rtl_obstack;\n");
319 puts ("#define obstack_alloc_rtx(n) \\");
320 puts (" ((rtx) obstack_alloc (rtl_obstack, \\");
321 puts (" sizeof (struct rtx_def) \\");
322 puts (" + ((n) - 1) * sizeof (rtunion)))\n");
324 for (fmt = formats; *fmt != 0; fmt++)
328 /* This is the main program. We accept only one argument, "-h", which
329 says we are writing the genrtl.h file. Otherwise we are writing the
331 extern int main PARAMS ((int, char **));
341 if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
346 if (ferror (stdout) || fflush (stdout) || fclose (stdout))
347 return FATAL_EXIT_CODE;
349 return SUCCESS_EXIT_CODE;