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3ad7bb1c | 1 | /* Generate code to allocate RTL structures. |
fbd26352 | 2 | Copyright (C) 1997-2019 Free Software Foundation, Inc. |
3ad7bb1c | 3 | |
f12b58b3 | 4 | This file is part of GCC. |
3ad7bb1c | 5 | |
f12b58b3 | 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 | |
8c4c00c1 | 8 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 9 | version. |
3ad7bb1c | 10 | |
f12b58b3 | 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 | |
14 | for more details. | |
3ad7bb1c | 15 | |
16 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
3ad7bb1c | 19 | |
20 | ||
805e22b2 | 21 | #include "bconfig.h" |
1486870d | 22 | #include "system.h" |
0e3985ee | 23 | |
307e368b | 24 | struct rtx_definition |
3ad7bb1c | 25 | { |
e99c3a1d | 26 | const char *const enumname, *const name, *const format; |
3ad7bb1c | 27 | }; |
28 | ||
47a2c1d4 | 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 "" | |
33 | ||
18e43155 | 34 | #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT }, |
3ad7bb1c | 35 | |
307e368b | 36 | static const struct rtx_definition defs[] = |
37 | { | |
3ad7bb1c | 38 | #include "rtl.def" /* rtl expressions are documented here */ |
39 | }; | |
9af5ce0c | 40 | #define NUM_RTX_CODE ARRAY_SIZE (defs) |
3ad7bb1c | 41 | |
e7c691ac | 42 | static const char *formats[NUM_RTX_CODE]; |
7014838c | 43 | \f |
67f2a2eb | 44 | /* Decode a format letter into a C type string. */ |
45 | ||
3ad7bb1c | 46 | static const char * |
1a97be37 | 47 | type_from_format (int c) |
3ad7bb1c | 48 | { |
49 | switch (c) | |
50 | { | |
51 | case 'i': | |
7014838c | 52 | return "int "; |
53 | ||
3ad7bb1c | 54 | case 'w': |
7014838c | 55 | return "HOST_WIDE_INT "; |
56 | ||
9edf7ea8 | 57 | case 'p': |
58 | return "poly_uint16 "; | |
59 | ||
3ad7bb1c | 60 | case 's': |
9a356c3c | 61 | return "const char *"; |
7014838c | 62 | |
63 | case 'e': case 'u': | |
64 | return "rtx "; | |
65 | ||
3ad7bb1c | 66 | case 'E': |
7014838c | 67 | return "rtvec "; |
a3426c4c | 68 | case 't': |
161dfa6e | 69 | return "tree "; |
c100ae55 | 70 | case 'B': |
161dfa6e | 71 | return "basic_block "; |
3ad7bb1c | 72 | default: |
e0a4c0c2 | 73 | gcc_unreachable (); |
3ad7bb1c | 74 | } |
75 | } | |
76 | ||
67f2a2eb | 77 | /* Decode a format letter into the proper accessor function. */ |
78 | ||
3ad7bb1c | 79 | static const char * |
1a97be37 | 80 | accessor_from_format (int c) |
3ad7bb1c | 81 | { |
82 | switch (c) | |
83 | { | |
84 | case 'i': | |
85 | return "XINT"; | |
7014838c | 86 | |
3ad7bb1c | 87 | case 'w': |
88 | return "XWINT"; | |
7014838c | 89 | |
3ad7bb1c | 90 | case 's': |
91 | return "XSTR"; | |
7014838c | 92 | |
93 | case 'e': case 'u': | |
3ad7bb1c | 94 | return "XEXP"; |
7014838c | 95 | |
3ad7bb1c | 96 | case 'E': |
97 | return "XVEC"; | |
7014838c | 98 | |
a3426c4c | 99 | case 't': |
100 | return "XTREE"; | |
7014838c | 101 | |
c100ae55 | 102 | case 'B': |
103 | return "XBBDEF"; | |
51f6e244 | 104 | |
105 | default: | |
e0a4c0c2 | 106 | gcc_unreachable (); |
3ad7bb1c | 107 | } |
108 | } | |
109 | ||
7014838c | 110 | /* Return nonzero if we should ignore FMT, an RTL format, when making |
111 | the list of formats we write routines to create. */ | |
67f2a2eb | 112 | |
3ad7bb1c | 113 | static int |
1a97be37 | 114 | special_format (const char *fmt) |
3ad7bb1c | 115 | { |
116 | return (strchr (fmt, '*') != 0 | |
117 | || strchr (fmt, 'V') != 0 | |
118 | || strchr (fmt, 'S') != 0 | |
15183fd2 | 119 | || strchr (fmt, 'n') != 0 |
120 | || strchr (fmt, 'r') != 0); | |
3ad7bb1c | 121 | } |
122 | ||
d1f9b275 | 123 | /* Return true if CODE always has VOIDmode. */ |
124 | ||
125 | static inline bool | |
126 | always_void_p (int idx) | |
127 | { | |
128 | return strcmp (defs[idx].enumname, "SET") == 0; | |
129 | } | |
130 | ||
2ff23ed0 | 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). */ | |
67f2a2eb | 134 | |
3ad7bb1c | 135 | static int |
1a97be37 | 136 | special_rtx (int idx) |
3ad7bb1c | 137 | { |
ede4900a | 138 | return (strcmp (defs[idx].enumname, "EXPR_LIST") == 0 |
139 | || strcmp (defs[idx].enumname, "INSN_LIST") == 0 | |
f935868a | 140 | || strcmp (defs[idx].enumname, "INSN") == 0 |
13be9dc6 | 141 | || strcmp (defs[idx].enumname, "CONST_INT") == 0 |
b5ba9f3a | 142 | || strcmp (defs[idx].enumname, "REG") == 0 |
701e46d0 | 143 | || strcmp (defs[idx].enumname, "SUBREG") == 0 |
9426b612 | 144 | || strcmp (defs[idx].enumname, "MEM") == 0 |
1a860023 | 145 | || strcmp (defs[idx].enumname, "PC") == 0 |
146 | || strcmp (defs[idx].enumname, "CC0") == 0 | |
147 | || strcmp (defs[idx].enumname, "RETURN") == 0 | |
9cb2517e | 148 | || strcmp (defs[idx].enumname, "SIMPLE_RETURN") == 0 |
9426b612 | 149 | || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0); |
3ad7bb1c | 150 | } |
151 | ||
2ff23ed0 | 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). */ | |
155 | ||
156 | static int | |
1a97be37 | 157 | excluded_rtx (int idx) |
2ff23ed0 | 158 | { |
e1398578 | 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 | |
bbad7cd0 | 162 | || strcmp (defs[idx].enumname, "CONST_POLY_INT") == 0 |
e1398578 | 163 | || strcmp (defs[idx].enumname, "CONST_FIXED") == 0); |
2ff23ed0 | 164 | } |
165 | ||
aa40f561 | 166 | /* Place a list of all format specifiers we use into the array FORMAT. */ |
67f2a2eb | 167 | |
3ad7bb1c | 168 | static void |
1a97be37 | 169 | find_formats (void) |
3ad7bb1c | 170 | { |
08985aff | 171 | unsigned int i; |
3ad7bb1c | 172 | |
08985aff | 173 | for (i = 0; i < NUM_RTX_CODE; i++) |
3ad7bb1c | 174 | { |
175 | const char **f; | |
176 | ||
177 | if (special_format (defs[i].format)) | |
178 | continue; | |
179 | ||
7014838c | 180 | for (f = formats; *f; f++) |
67f2a2eb | 181 | if (! strcmp (*f, defs[i].format)) |
3ad7bb1c | 182 | break; |
183 | ||
7014838c | 184 | if (*f == 0) |
3ad7bb1c | 185 | *f = defs[i].format; |
186 | } | |
187 | } | |
188 | ||
3ad7bb1c | 189 | |
7014838c | 190 | /* Generate macros to generate RTL of code IDX using the functions we |
191 | write. */ | |
67f2a2eb | 192 | |
307e368b | 193 | static void |
1a97be37 | 194 | genmacro (int idx) |
3ad7bb1c | 195 | { |
196 | const char *p; | |
d1f9b275 | 197 | const char *sep = ""; |
3ad7bb1c | 198 | int i; |
199 | ||
7014838c | 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. */ | |
3ad7bb1c | 202 | |
2ff23ed0 | 203 | if (excluded_rtx (idx)) |
204 | /* Don't define a macro for this code. */ | |
205 | return; | |
206 | ||
d1f9b275 | 207 | bool has_mode_p = !always_void_p (idx); |
208 | printf ("#define gen_rtx_%s%s(", | |
7014838c | 209 | special_rtx (idx) ? "raw_" : "", defs[idx].enumname); |
d1f9b275 | 210 | if (has_mode_p) |
211 | { | |
212 | printf ("MODE"); | |
213 | sep = ", "; | |
214 | } | |
7014838c | 215 | |
216 | for (p = defs[idx].format, i = 0; *p != 0; p++) | |
3ad7bb1c | 217 | if (*p != '0') |
d1f9b275 | 218 | { |
219 | printf ("%sARG%d", sep, i++); | |
220 | sep = ", "; | |
221 | } | |
222 | ||
223 | printf (") \\\n gen_rtx_fmt_%s (%s, %s", | |
224 | defs[idx].format, defs[idx].enumname, | |
225 | has_mode_p ? "(MODE)" : "VOIDmode"); | |
3ad7bb1c | 226 | |
7014838c | 227 | for (p = defs[idx].format, i = 0; *p != 0; p++) |
3ad7bb1c | 228 | if (*p != '0') |
7014838c | 229 | printf (", (ARG%d)", i++); |
230 | ||
791ceafe | 231 | puts (")"); |
3ad7bb1c | 232 | } |
233 | ||
7014838c | 234 | /* Generate the code for the function to generate RTL whose |
235 | format is FORMAT. */ | |
67f2a2eb | 236 | |
3ad7bb1c | 237 | static void |
1a97be37 | 238 | gendef (const char *format) |
3ad7bb1c | 239 | { |
240 | const char *p; | |
241 | int i, j; | |
307e368b | 242 | |
7014838c | 243 | /* Start by writing the definition of the function name and the types |
244 | of the arguments. */ | |
3ad7bb1c | 245 | |
3754d046 | 246 | printf ("static inline rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, machine_mode mode", format); |
7014838c | 247 | for (p = format, i = 0; *p != 0; p++) |
3ad7bb1c | 248 | if (*p != '0') |
69dc4d00 | 249 | printf (",\n\t%sarg%d", type_from_format (*p), i++); |
3ad7bb1c | 250 | |
60ad3b0e | 251 | puts (" MEM_STAT_DECL)"); |
7014838c | 252 | |
253 | /* Now write out the body of the function itself, which allocates | |
254 | the memory and initializes it. */ | |
791ceafe | 255 | puts ("{"); |
256 | puts (" rtx rt;"); | |
68095389 | 257 | puts (" rt = rtx_alloc (code PASS_MEM_STAT);\n"); |
791ceafe | 258 | |
937ca48e | 259 | puts (" PUT_MODE_RAW (rt, mode);"); |
3ad7bb1c | 260 | |
261 | for (p = format, i = j = 0; *p ; ++p, ++i) | |
9edf7ea8 | 262 | if (*p == '0') |
791ceafe | 263 | printf (" X0EXP (rt, %d) = NULL_RTX;\n", i); |
9edf7ea8 | 264 | else if (*p == 'p') |
265 | printf (" SUBREG_BYTE (rt) = arg%d;\n", j++); | |
266 | else | |
267 | printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++); | |
3ad7bb1c | 268 | |
791ceafe | 269 | puts ("\n return rt;\n}\n"); |
b6762859 | 270 | printf ("#define gen_rtx_fmt_%s(c, m", format); |
271 | for (p = format, i = 0; *p != 0; p++) | |
272 | if (*p != '0') | |
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++) | |
276 | if (*p != '0') | |
277 | printf (", p%i",i++); | |
278 | printf (" MEM_STAT_INFO)\n\n"); | |
3ad7bb1c | 279 | } |
280 | ||
7014838c | 281 | /* Generate the documentation header for files we write. */ |
67f2a2eb | 282 | |
3ad7bb1c | 283 | static void |
1a97be37 | 284 | genlegend (void) |
3ad7bb1c | 285 | { |
791ceafe | 286 | puts ("/* Generated automatically by gengenrtl from rtl.def. */\n"); |
3ad7bb1c | 287 | } |
288 | ||
7014838c | 289 | /* Generate the text of the header file we make, genrtl.h. */ |
67f2a2eb | 290 | |
3ad7bb1c | 291 | static void |
1a97be37 | 292 | genheader (void) |
3ad7bb1c | 293 | { |
08985aff | 294 | unsigned int i; |
3ad7bb1c | 295 | const char **fmt; |
d0c809e1 | 296 | |
297 | puts ("#ifndef GCC_GENRTL_H"); | |
298 | puts ("#define GCC_GENRTL_H\n"); | |
60ad3b0e | 299 | puts ("#include \"statistics.h\"\n"); |
d0c809e1 | 300 | |
3ad7bb1c | 301 | for (fmt = formats; *fmt; ++fmt) |
b6762859 | 302 | gendef (*fmt); |
3ad7bb1c | 303 | |
791ceafe | 304 | putchar ('\n'); |
3ad7bb1c | 305 | |
08985aff | 306 | for (i = 0; i < NUM_RTX_CODE; i++) |
7014838c | 307 | if (! special_format (defs[i].format)) |
308 | genmacro (i); | |
d0c809e1 | 309 | |
310 | puts ("\n#endif /* GCC_GENRTL_H */"); | |
3ad7bb1c | 311 | } |
312 | ||
b6762859 | 313 | /* This is the main program. */ |
7014838c | 314 | |
3ad7bb1c | 315 | int |
b6762859 | 316 | main (void) |
3ad7bb1c | 317 | { |
3ad7bb1c | 318 | find_formats (); |
7014838c | 319 | genlegend (); |
3ad7bb1c | 320 | |
b6762859 | 321 | genheader (); |
3ad7bb1c | 322 | |
d0c809e1 | 323 | if (ferror (stdout) || fflush (stdout) || fclose (stdout)) |
324 | return FATAL_EXIT_CODE; | |
325 | ||
326 | return SUCCESS_EXIT_CODE; | |
3ad7bb1c | 327 | } |