1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997-2018 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 3, 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 COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
26 const char *const enumname, *const name, *const format;
29 /* rtl.def needs CONST_DOUBLE_FORMAT, but we don't care what
30 CONST_DOUBLE_FORMAT is because we're not going to be generating
31 anything for CONST_DOUBLE anyway. */
32 #define CONST_DOUBLE_FORMAT ""
34 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT },
36 static const struct rtx_definition defs[] =
38 #include "rtl.def" /* rtl expressions are documented here */
40 #define NUM_RTX_CODE ARRAY_SIZE (defs)
42 static const char *formats[NUM_RTX_CODE];
44 /* Decode a format letter into a C type string. */
47 type_from_format (int c)
55 return "HOST_WIDE_INT ";
58 return "poly_uint16 ";
61 return "const char *";
71 return "basic_block ";
77 /* Decode a format letter into the proper accessor function. */
80 accessor_from_format (int c)
110 /* Return nonzero if we should ignore FMT, an RTL format, when making
111 the list of formats we write routines to create. */
114 special_format (const char *fmt)
116 return (strchr (fmt, '*') != 0
117 || strchr (fmt, 'V') != 0
118 || strchr (fmt, 'S') != 0
119 || strchr (fmt, 'n') != 0
120 || strchr (fmt, 'r') != 0);
123 /* Return true if CODE always has VOIDmode. */
126 always_void_p (int idx)
128 return strcmp (defs[idx].enumname, "SET") == 0;
131 /* Return nonzero if the RTL code given by index IDX is one that we should
132 generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
133 is a wrapper in emit-rtl.c). */
136 special_rtx (int idx)
138 return (strcmp (defs[idx].enumname, "EXPR_LIST") == 0
139 || strcmp (defs[idx].enumname, "INSN_LIST") == 0
140 || strcmp (defs[idx].enumname, "INSN") == 0
141 || strcmp (defs[idx].enumname, "CONST_INT") == 0
142 || strcmp (defs[idx].enumname, "REG") == 0
143 || strcmp (defs[idx].enumname, "SUBREG") == 0
144 || strcmp (defs[idx].enumname, "MEM") == 0
145 || strcmp (defs[idx].enumname, "PC") == 0
146 || strcmp (defs[idx].enumname, "CC0") == 0
147 || strcmp (defs[idx].enumname, "RETURN") == 0
148 || strcmp (defs[idx].enumname, "SIMPLE_RETURN") == 0
149 || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0);
152 /* Return nonzero if the RTL code given by index IDX is one that we should
153 generate no macro for at all (because gen_rtx_FOO is never used or
154 cannot have the obvious interface). */
157 excluded_rtx (int idx)
159 return (strcmp (defs[idx].enumname, "VAR_LOCATION") == 0
160 || strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0
161 || strcmp (defs[idx].enumname, "CONST_WIDE_INT") == 0
162 || strcmp (defs[idx].enumname, "CONST_POLY_INT") == 0
163 || strcmp (defs[idx].enumname, "CONST_FIXED") == 0);
166 /* Place a list of all format specifiers we use into the array FORMAT. */
173 for (i = 0; i < NUM_RTX_CODE; i++)
177 if (special_format (defs[i].format))
180 for (f = formats; *f; f++)
181 if (! strcmp (*f, defs[i].format))
190 /* Generate macros to generate RTL of code IDX using the functions we
197 const char *sep = "";
200 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
201 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
203 if (excluded_rtx (idx))
204 /* Don't define a macro for this code. */
207 bool has_mode_p = !always_void_p (idx);
208 printf ("#define gen_rtx_%s%s(",
209 special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
216 for (p = defs[idx].format, i = 0; *p != 0; p++)
219 printf ("%sARG%d", sep, i++);
223 printf (") \\\n gen_rtx_fmt_%s (%s, %s",
224 defs[idx].format, defs[idx].enumname,
225 has_mode_p ? "(MODE)" : "VOIDmode");
227 for (p = defs[idx].format, i = 0; *p != 0; p++)
229 printf (", (ARG%d)", i++);
234 /* Generate the code for the function to generate RTL whose
238 gendef (const char *format)
243 /* Start by writing the definition of the function name and the types
246 printf ("static inline rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, machine_mode mode", format);
247 for (p = format, i = 0; *p != 0; p++)
249 printf (",\n\t%sarg%d", type_from_format (*p), i++);
251 puts (" MEM_STAT_DECL)");
253 /* Now write out the body of the function itself, which allocates
254 the memory and initializes it. */
257 puts (" rt = rtx_alloc (code PASS_MEM_STAT);\n");
259 puts (" PUT_MODE_RAW (rt, mode);");
261 for (p = format, i = j = 0; *p ; ++p, ++i)
263 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
265 printf (" SUBREG_BYTE (rt) = arg%d;\n", j++);
267 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
269 puts ("\n return rt;\n}\n");
270 printf ("#define gen_rtx_fmt_%s(c, m", format);
271 for (p = format, i = 0; *p != 0; p++)
273 printf (", p%i",i++);
274 printf (")\\\n gen_rtx_fmt_%s_stat (c, m", format);
275 for (p = format, i = 0; *p != 0; p++)
277 printf (", p%i",i++);
278 printf (" MEM_STAT_INFO)\n\n");
281 /* Generate the documentation header for files we write. */
286 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
289 /* Generate the text of the header file we make, genrtl.h. */
297 puts ("#ifndef GCC_GENRTL_H");
298 puts ("#define GCC_GENRTL_H\n");
299 puts ("#include \"statistics.h\"\n");
301 for (fmt = formats; *fmt; ++fmt)
306 for (i = 0; i < NUM_RTX_CODE; i++)
307 if (! special_format (defs[i].format))
310 puts ("\n#endif /* GCC_GENRTL_H */");
313 /* This is the main program. */
323 if (ferror (stdout) || fflush (stdout) || fclose (stdout))
324 return FATAL_EXIT_CODE;
326 return SUCCESS_EXIT_CODE;