1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2007
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
27 const char *const enumname, *const name, *const format;
30 /* rtl.def needs CONST_DOUBLE_FORMAT, but we don't care what
31 CONST_DOUBLE_FORMAT is because we're not going to be generating
32 anything for CONST_DOUBLE anyway. */
33 #define CONST_DOUBLE_FORMAT ""
35 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT },
37 static const struct rtx_definition defs[] =
39 #include "rtl.def" /* rtl expressions are documented here */
41 #define NUM_RTX_CODE ARRAY_SIZE(defs)
43 static const char *formats[NUM_RTX_CODE];
45 static const char *type_from_format (int);
46 static const char *accessor_from_format (int);
47 static int special_format (const char *);
48 static int special_rtx (int);
49 static int excluded_rtx (int);
50 static void find_formats (void);
51 static void gendecl (const char *);
52 static void genmacro (int);
53 static void gendef (const char *);
54 static void genlegend (void);
55 static void genheader (void);
56 static void gencode (void);
58 /* Decode a format letter into a C type string. */
61 type_from_format (int c)
69 return "HOST_WIDE_INT ";
72 return "const char *";
80 return "union tree_node *"; /* tree - typedef not available */
82 return "struct basic_block_def *"; /* basic block - typedef not available */
88 /* Decode a format letter into the proper accessor function. */
91 accessor_from_format (int c)
121 /* Return nonzero if we should ignore FMT, an RTL format, when making
122 the list of formats we write routines to create. */
125 special_format (const char *fmt)
127 return (strchr (fmt, '*') != 0
128 || strchr (fmt, 'V') != 0
129 || strchr (fmt, 'S') != 0
130 || strchr (fmt, 'n') != 0);
133 /* Return nonzero if the RTL code given by index IDX is one that we should
134 generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
135 is a wrapper in emit-rtl.c). */
138 special_rtx (int idx)
140 return (strcmp (defs[idx].enumname, "CONST_INT") == 0
141 || strcmp (defs[idx].enumname, "REG") == 0
142 || strcmp (defs[idx].enumname, "SUBREG") == 0
143 || strcmp (defs[idx].enumname, "MEM") == 0
144 || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0);
147 /* Return nonzero if the RTL code given by index IDX is one that we should
148 generate no macro for at all (because gen_rtx_FOO is never used or
149 cannot have the obvious interface). */
152 excluded_rtx (int idx)
154 return ((strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0)
155 || (strcmp (defs[idx].enumname, "CONST_FIXED") == 0));
158 /* Place a list of all format specifiers we use into the array FORMAT. */
165 for (i = 0; i < NUM_RTX_CODE; i++)
169 if (special_format (defs[i].format))
172 for (f = formats; *f; f++)
173 if (! strcmp (*f, defs[i].format))
181 /* Write the declarations for the routine to allocate RTL with FORMAT. */
184 gendecl (const char *format)
189 printf ("extern rtx gen_rtx_fmt_%s_stat\t (RTX_CODE, ", format);
190 printf ("enum machine_mode mode");
192 /* Write each parameter that is needed and start a new line when the line
194 for (p = format, i = 0, pos = 75; *p != 0; p++)
197 int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9);
200 if (pos + ourlen > 76)
201 printf ("\n\t\t\t\t "), pos = 39;
203 printf (" %sarg%d", type_from_format (*p), i++);
206 printf (" MEM_STAT_DECL");
209 printf ("#define gen_rtx_fmt_%s(c, m", format);
210 for (p = format, i = 0; *p != 0; p++)
212 printf (", p%i",i++);
213 printf (")\\\n gen_rtx_fmt_%s_stat (c, m", format);
214 for (p = format, i = 0; *p != 0; p++)
216 printf (", p%i",i++);
217 printf (" MEM_STAT_INFO)\n\n");
220 /* Generate macros to generate RTL of code IDX using the functions we
229 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
230 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
232 if (excluded_rtx (idx))
233 /* Don't define a macro for this code. */
236 printf ("#define gen_rtx_%s%s(MODE",
237 special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
239 for (p = defs[idx].format, i = 0; *p != 0; p++)
241 printf (", ARG%d", i++);
243 printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
244 defs[idx].format, defs[idx].enumname);
246 for (p = defs[idx].format, i = 0; *p != 0; p++)
248 printf (", (ARG%d)", i++);
253 /* Generate the code for the function to generate RTL whose
257 gendef (const char *format)
262 /* Start by writing the definition of the function name and the types
265 printf ("rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, enum machine_mode mode", format);
266 for (p = format, i = 0; *p != 0; p++)
268 printf (",\n\t%sarg%d", type_from_format (*p), i++);
270 puts (" MEM_STAT_DECL)");
272 /* Now write out the body of the function itself, which allocates
273 the memory and initializes it. */
276 puts (" rt = rtx_alloc_stat (code PASS_MEM_STAT);\n");
278 puts (" PUT_MODE (rt, mode);");
280 for (p = format, i = j = 0; *p ; ++p, ++i)
282 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
284 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
286 puts ("\n return rt;\n}\n");
289 /* Generate the documentation header for files we write. */
294 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
297 /* Generate the text of the header file we make, genrtl.h. */
305 puts ("#ifndef GCC_GENRTL_H");
306 puts ("#define GCC_GENRTL_H\n");
307 puts ("#include \"statistics.h\"\n");
309 for (fmt = formats; *fmt; ++fmt)
314 for (i = 0; i < NUM_RTX_CODE; i++)
315 if (! special_format (defs[i].format))
318 puts ("\n#endif /* GCC_GENRTL_H */");
321 /* Generate the text of the code file we write, genrtl.c. */
328 puts ("#include \"config.h\"");
329 puts ("#include \"system.h\"");
330 puts ("#include \"coretypes.h\"");
331 puts ("#include \"tm.h\"");
332 puts ("#include \"obstack.h\"");
333 puts ("#include \"rtl.h\"");
334 puts ("#include \"ggc.h\"\n");
336 for (fmt = formats; *fmt != 0; fmt++)
340 /* This is the main program. We accept only one argument, "-h", which
341 says we are writing the genrtl.h file. Otherwise we are writing the
345 main (int argc, char **argv)
350 if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
355 if (ferror (stdout) || fflush (stdout) || fclose (stdout))
356 return FATAL_EXIT_CODE;
358 return SUCCESS_EXIT_CODE;