1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997, 1998, 1999, 2000, 2002 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
24 #include "coretypes.h"
35 const char *const enumname, *const name, *const format;
38 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGX(ENUM), NAME, FORMAT },
40 static const struct rtx_definition defs[] =
42 #include "rtl.def" /* rtl expressions are documented here */
45 static const char *formats[NUM_RTX_CODE];
47 static const char *type_from_format PARAMS ((int));
48 static const char *accessor_from_format PARAMS ((int));
49 static int special_format PARAMS ((const char *));
50 static int special_rtx PARAMS ((int));
51 static int excluded_rtx PARAMS ((int));
52 static void find_formats PARAMS ((void));
53 static void gendecl PARAMS ((const char *));
54 static void genmacro PARAMS ((int));
55 static void gendef PARAMS ((const char *));
56 static void genlegend PARAMS ((void));
57 static void genheader PARAMS ((void));
58 static void gencode PARAMS ((void));
60 /* Decode a format letter into a C type string. */
72 return "HOST_WIDE_INT ";
75 return "const char *";
83 return "struct bitmap_head_def *"; /* bitmap - typedef not available */
85 return "union tree_node *"; /* tree - typedef not available */
87 return "struct basic_block_def *"; /* basic block - typedef not available */
93 /* Decode a format letter into the proper accessor function. */
96 accessor_from_format (c)
130 /* Return nonzero if we should ignore FMT, an RTL format, when making
131 the list of formats we write routines to create. */
137 return (strchr (fmt, '*') != 0
138 || strchr (fmt, 'V') != 0
139 || strchr (fmt, 'S') != 0
140 || strchr (fmt, 'n') != 0);
143 /* Return nonzero if the RTL code given by index IDX is one that we should
144 generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
145 is a wrapper in emit-rtl.c). */
151 return (strcmp (defs[idx].enumname, "CONST_INT") == 0
152 || strcmp (defs[idx].enumname, "REG") == 0
153 || strcmp (defs[idx].enumname, "SUBREG") == 0
154 || strcmp (defs[idx].enumname, "MEM") == 0
155 || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0);
158 /* Return nonzero if the RTL code given by index IDX is one that we should
159 generate no macro for at all (because gen_rtx_FOO is never used or
160 cannot have the obvious interface). */
166 return (strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0);
169 /* Place a list of all format specifiers we use into the array FORMAT. */
176 for (i = 0; i < NUM_RTX_CODE; i++)
180 if (special_format (defs[i].format))
183 for (f = formats; *f; f++)
184 if (! strcmp (*f, defs[i].format))
192 /* Write the declarations for the routine to allocate RTL with FORMAT. */
201 printf ("extern rtx gen_rtx_fmt_%s\tPARAMS ((RTX_CODE, ", format);
202 printf ("enum machine_mode mode");
204 /* Write each parameter that is needed and start a new line when the line
206 for (p = format, i = 0, pos = 75; *p != 0; p++)
209 int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9);
212 if (pos + ourlen > 76)
213 printf ("\n\t\t\t\t "), pos = 39;
215 printf (" %sarg%d", type_from_format (*p), i++);
222 /* Generate macros to generate RTL of code IDX using the functions we
232 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
233 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
235 if (excluded_rtx (idx))
236 /* Don't define a macro for this code. */
239 printf ("#define gen_rtx_%s%s(MODE",
240 special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
242 for (p = defs[idx].format, i = 0; *p != 0; p++)
244 printf (", ARG%d", i++);
246 printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
247 defs[idx].format, defs[idx].enumname);
249 for (p = defs[idx].format, i = 0; *p != 0; p++)
251 printf (", (ARG%d)", i++);
256 /* Generate the code for the function to generate RTL whose
266 /* Start by writing the definition of the function name and the types
269 printf ("rtx\ngen_rtx_fmt_%s (code, mode", format);
270 for (p = format, i = 0; *p != 0; p++)
272 printf (", arg%d", i++);
274 puts (")\n RTX_CODE code;\n enum machine_mode mode;");
275 for (p = format, i = 0; *p != 0; p++)
277 printf (" %sarg%d;\n", type_from_format (*p), i++);
279 /* Now write out the body of the function itself, which allocates
280 the memory and initializes it. */
283 printf (" rt = ggc_alloc_rtx (%d);\n", (int) strlen (format));
285 puts (" memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));\n");
286 puts (" PUT_CODE (rt, code);");
287 puts (" PUT_MODE (rt, mode);");
289 for (p = format, i = j = 0; *p ; ++p, ++i)
291 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
293 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
295 puts ("\n return rt;\n}\n");
298 /* Generate the documentation header for files we write. */
303 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
306 /* Generate the text of the header file we make, genrtl.h. */
314 puts ("#ifndef GCC_GENRTL_H");
315 puts ("#define GCC_GENRTL_H\n");
317 for (fmt = formats; *fmt; ++fmt)
322 for (i = 0; i < NUM_RTX_CODE; i++)
323 if (! special_format (defs[i].format))
326 puts ("\n#endif /* GCC_GENRTL_H */");
329 /* Generate the text of the code file we write, genrtl.c. */
336 puts ("#include \"config.h\"");
337 puts ("#include \"system.h\"");
338 puts ("#include \"coretypes.h\"");
339 puts ("#include \"tm.h\"");
340 puts ("#include \"obstack.h\"");
341 puts ("#include \"rtl.h\"");
342 puts ("#include \"ggc.h\"\n");
344 for (fmt = formats; *fmt != 0; fmt++)
348 /* This is the main program. We accept only one argument, "-h", which
349 says we are writing the genrtl.h file. Otherwise we are writing the
351 extern int main PARAMS ((int, char **));
361 if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
366 if (ferror (stdout) || fflush (stdout) || fclose (stdout))
367 return FATAL_EXIT_CODE;
369 return SUCCESS_EXIT_CODE;