Mercurial > hg > CbC > CbC_gcc
annotate gcc/toplev.c @ 88:f214c1d5b862
merge 89
| author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 20 Dec 2011 18:53:46 +0900 |
| parents | f6334be47118 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Top level of GCC compilers (cc1, cc1plus, etc.) |
| 2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
|
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3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, |
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4 2011 Free Software Foundation, Inc. |
| 0 | 5 |
| 6 This file is part of GCC. | |
| 7 | |
| 8 GCC is free software; you can redistribute it and/or modify it under | |
| 9 the terms of the GNU General Public License as published by the Free | |
| 10 Software Foundation; either version 3, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with GCC; see the file COPYING3. If not see | |
| 20 <http://www.gnu.org/licenses/>. */ | |
| 21 | |
| 22 /* This is the top level of cc1/c++. | |
| 23 It parses command args, opens files, invokes the various passes | |
| 24 in the proper order, and counts the time used by each. | |
| 25 Error messages and low-level interface to malloc also handled here. */ | |
| 26 | |
| 27 #include "config.h" | |
| 28 #include "system.h" | |
| 29 #include "coretypes.h" | |
| 30 #include "tm.h" | |
| 31 #include "line-map.h" | |
| 32 #include "input.h" | |
| 33 #include "tree.h" | |
|
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34 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */ |
| 0 | 35 #include "version.h" |
| 36 #include "rtl.h" | |
| 37 #include "tm_p.h" | |
| 38 #include "flags.h" | |
| 39 #include "insn-attr.h" | |
| 40 #include "insn-config.h" | |
| 41 #include "insn-flags.h" | |
| 42 #include "hard-reg-set.h" | |
| 43 #include "recog.h" | |
| 44 #include "output.h" | |
| 45 #include "except.h" | |
| 46 #include "function.h" | |
| 47 #include "toplev.h" | |
| 48 #include "expr.h" | |
| 49 #include "basic-block.h" | |
| 50 #include "intl.h" | |
| 51 #include "ggc.h" | |
| 52 #include "graph.h" | |
| 53 #include "regs.h" | |
| 54 #include "timevar.h" | |
| 55 #include "diagnostic.h" | |
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56 #include "tree-diagnostic.h" |
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57 #include "tree-pretty-print.h" |
| 0 | 58 #include "params.h" |
| 59 #include "reload.h" | |
| 60 #include "ira.h" | |
| 61 #include "dwarf2asm.h" | |
| 62 #include "integrate.h" | |
| 63 #include "debug.h" | |
| 64 #include "target.h" | |
| 65 #include "langhooks.h" | |
| 66 #include "cfglayout.h" | |
| 67 #include "cfgloop.h" | |
| 68 #include "hosthooks.h" | |
| 69 #include "cgraph.h" | |
| 70 #include "opts.h" | |
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71 #include "opts-diagnostic.h" |
| 0 | 72 #include "coverage.h" |
| 73 #include "value-prof.h" | |
| 74 #include "alloc-pool.h" | |
| 75 #include "tree-mudflap.h" | |
| 76 #include "tree-pass.h" | |
| 77 #include "gimple.h" | |
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78 #include "tree-ssa-alias.h" |
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79 #include "plugin.h" |
| 0 | 80 |
| 81 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) | |
| 82 #include "dwarf2out.h" | |
| 83 #endif | |
| 84 | |
| 85 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) | |
| 86 #include "dbxout.h" | |
| 87 #endif | |
| 88 | |
| 89 #ifdef SDB_DEBUGGING_INFO | |
| 90 #include "sdbout.h" | |
| 91 #endif | |
| 92 | |
| 93 #ifdef XCOFF_DEBUGGING_INFO | |
| 94 #include "xcoffout.h" /* Needed for external data | |
| 95 declarations for e.g. AIX 4.x. */ | |
| 96 #endif | |
| 97 | |
| 98 static void general_init (const char *); | |
| 99 static void do_compile (void); | |
| 100 static void process_options (void); | |
| 101 static void backend_init (void); | |
| 102 static int lang_dependent_init (const char *); | |
| 103 static void init_asm_output (const char *); | |
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104 static void finalize (bool); |
| 0 | 105 |
| 106 static void crash_signal (int) ATTRIBUTE_NORETURN; | |
| 107 static void compile_file (void); | |
| 108 | |
| 109 /* True if we don't need a backend (e.g. preprocessing only). */ | |
| 110 static bool no_backend; | |
| 111 | |
| 112 /* Length of line when printing switch values. */ | |
| 113 #define MAX_LINE 75 | |
| 114 | |
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115 /* Decoded options, and number of such options. */ |
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116 struct cl_decoded_option *save_decoded_options; |
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117 unsigned int save_decoded_options_count; |
| 0 | 118 |
| 119 /* Used to enable -fvar-tracking, -fweb and -frename-registers according | |
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120 to optimize in process_options (). */ |
| 0 | 121 #define AUTODETECT_VALUE 2 |
| 122 | |
| 123 /* Debug hooks - dependent upon command line options. */ | |
| 124 | |
| 125 const struct gcc_debug_hooks *debug_hooks; | |
| 126 | |
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127 /* True if this is the lto front end. This is used to disable |
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128 gimple generation and lowering passes that are normally run on the |
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129 output of a front end. These passes must be bypassed for lto since |
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130 they have already been done before the gimple was written. */ |
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131 |
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132 bool in_lto_p = false; |
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133 |
| 0 | 134 /* The FUNCTION_DECL for the function currently being compiled, |
| 135 or 0 if between functions. */ | |
| 136 tree current_function_decl; | |
| 137 | |
| 138 /* Set to the FUNC_BEGIN label of the current function, or NULL | |
| 139 if none. */ | |
| 140 const char * current_function_func_begin_label; | |
| 141 | |
| 142 /* A random sequence of characters, unless overridden by user. */ | |
| 143 static const char *flag_random_seed; | |
| 144 | |
| 145 /* A local time stamp derived from the time of compilation. It will be | |
| 146 zero if the system cannot provide a time. It will be -1u, if the | |
| 147 user has specified a particular random seed. */ | |
| 148 unsigned local_tick; | |
| 149 | |
| 150 /* -f flags. */ | |
| 151 | |
| 152 /* Generate code for GNU or NeXT Objective-C runtime environment. */ | |
| 153 | |
| 154 #ifdef NEXT_OBJC_RUNTIME | |
| 155 int flag_next_runtime = 1; | |
| 156 #else | |
| 157 int flag_next_runtime = 0; | |
| 158 #endif | |
| 159 | |
| 160 /* Nonzero means make permerror produce warnings instead of errors. */ | |
| 161 | |
| 162 int flag_permissive = 0; | |
| 163 | |
| 164 /* When non-NULL, indicates that whenever space is allocated on the | |
| 165 stack, the resulting stack pointer must not pass this | |
| 166 address---that is, for stacks that grow downward, the stack pointer | |
| 167 must always be greater than or equal to this address; for stacks | |
| 168 that grow upward, the stack pointer must be less than this address. | |
| 169 At present, the rtx may be either a REG or a SYMBOL_REF, although | |
| 170 the support provided depends on the backend. */ | |
| 171 rtx stack_limit_rtx; | |
| 172 | |
| 173 /* True if the user has tagged the function with the 'section' | |
| 174 attribute. */ | |
| 175 | |
| 176 bool user_defined_section_attribute = false; | |
| 177 | |
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178 struct target_flag_state default_target_flag_state; |
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179 #if SWITCHABLE_TARGET |
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180 struct target_flag_state *this_target_flag_state = &default_target_flag_state; |
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181 #else |
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182 #define this_target_flag_state (&default_target_flag_state) |
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183 #endif |
| 0 | 184 |
| 185 typedef struct | |
| 186 { | |
| 187 const char *const string; | |
| 188 int *const variable; | |
| 189 const int on_value; | |
| 190 } | |
| 191 lang_independent_options; | |
| 192 | |
| 193 /* The user symbol prefix after having resolved same. */ | |
| 194 const char *user_label_prefix; | |
| 195 | |
| 196 static const param_info lang_independent_params[] = { | |
| 197 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \ | |
|
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198 { OPTION, DEFAULT, MIN, MAX, HELP }, |
| 0 | 199 #include "params.def" |
| 200 #undef DEFPARAM | |
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201 { NULL, 0, 0, 0, NULL } |
| 0 | 202 }; |
| 203 | |
| 204 /* Output files for assembler code (real compiler output) | |
| 205 and debugging dumps. */ | |
| 206 | |
| 207 FILE *asm_out_file; | |
| 208 FILE *aux_info_file; | |
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209 FILE *stack_usage_file = NULL; |
| 0 | 210 FILE *dump_file = NULL; |
| 211 const char *dump_file_name; | |
| 212 | |
| 213 /* The current working directory of a translation. It's generally the | |
| 214 directory from which compilation was initiated, but a preprocessed | |
| 215 file may specify the original directory in which it was | |
| 216 created. */ | |
| 217 | |
| 218 static const char *src_pwd; | |
| 219 | |
| 220 /* Initialize src_pwd with the given string, and return true. If it | |
| 221 was already initialized, return false. As a special case, it may | |
| 222 be called with a NULL argument to test whether src_pwd has NOT been | |
| 223 initialized yet. */ | |
| 224 | |
| 225 bool | |
| 226 set_src_pwd (const char *pwd) | |
| 227 { | |
| 228 if (src_pwd) | |
| 229 { | |
| 230 if (strcmp (src_pwd, pwd) == 0) | |
| 231 return true; | |
| 232 else | |
| 233 return false; | |
| 234 } | |
| 235 | |
| 236 src_pwd = xstrdup (pwd); | |
| 237 return true; | |
| 238 } | |
| 239 | |
| 240 /* Return the directory from which the translation unit was initiated, | |
| 241 in case set_src_pwd() was not called before to assign it a | |
| 242 different value. */ | |
| 243 | |
| 244 const char * | |
| 245 get_src_pwd (void) | |
| 246 { | |
| 247 if (! src_pwd) | |
| 248 { | |
| 249 src_pwd = getpwd (); | |
| 250 if (!src_pwd) | |
| 251 src_pwd = "."; | |
| 252 } | |
| 253 | |
| 254 return src_pwd; | |
| 255 } | |
| 256 | |
| 257 /* Called when the start of a function definition is parsed, | |
| 258 this function prints on stderr the name of the function. */ | |
| 259 void | |
| 260 announce_function (tree decl) | |
| 261 { | |
| 262 if (!quiet_flag) | |
| 263 { | |
| 264 if (rtl_dump_and_exit) | |
|
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265 fprintf (stderr, "%s ", |
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266 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl)))); |
| 0 | 267 else |
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268 fprintf (stderr, " %s", |
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269 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2))); |
| 0 | 270 fflush (stderr); |
| 271 pp_needs_newline (global_dc->printer) = true; | |
| 272 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL); | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 /* Initialize local_tick with the time of day, or -1 if | |
| 277 flag_random_seed is set. */ | |
| 278 | |
| 279 static void | |
| 280 init_local_tick (void) | |
| 281 { | |
| 282 if (!flag_random_seed) | |
| 283 { | |
| 284 /* Get some more or less random data. */ | |
| 285 #ifdef HAVE_GETTIMEOFDAY | |
| 286 { | |
| 287 struct timeval tv; | |
| 288 | |
| 289 gettimeofday (&tv, NULL); | |
| 290 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000; | |
| 291 } | |
| 292 #else | |
| 293 { | |
| 294 time_t now = time (NULL); | |
| 295 | |
| 296 if (now != (time_t)-1) | |
| 297 local_tick = (unsigned) now; | |
| 298 } | |
| 299 #endif | |
| 300 } | |
| 301 else | |
| 302 local_tick = -1; | |
| 303 } | |
| 304 | |
| 305 /* Set up a default flag_random_seed and local_tick, unless the user | |
| 306 already specified one. Must be called after init_local_tick. */ | |
| 307 | |
| 308 static void | |
| 309 init_random_seed (void) | |
| 310 { | |
| 311 unsigned HOST_WIDE_INT value; | |
| 312 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3]; | |
| 313 | |
| 314 value = local_tick ^ getpid (); | |
| 315 | |
| 316 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value); | |
| 317 flag_random_seed = random_seed; | |
| 318 } | |
| 319 | |
| 320 /* Obtain the random_seed string. Unless NOINIT, initialize it if | |
| 321 it's not provided in the command line. */ | |
| 322 | |
| 323 const char * | |
| 324 get_random_seed (bool noinit) | |
| 325 { | |
| 326 if (!flag_random_seed && !noinit) | |
| 327 init_random_seed (); | |
| 328 return flag_random_seed; | |
| 329 } | |
| 330 | |
| 331 /* Modify the random_seed string to VAL. Return its previous | |
| 332 value. */ | |
| 333 | |
| 334 const char * | |
| 335 set_random_seed (const char *val) | |
| 336 { | |
| 337 const char *old = flag_random_seed; | |
| 338 flag_random_seed = val; | |
| 339 return old; | |
| 340 } | |
| 341 | |
| 342 /* Handler for fatal signals, such as SIGSEGV. These are transformed | |
| 343 into ICE messages, which is much more user friendly. In case the | |
| 344 error printer crashes, reset the signal to prevent infinite recursion. */ | |
| 345 | |
| 346 static void | |
| 347 crash_signal (int signo) | |
| 348 { | |
| 349 signal (signo, SIG_DFL); | |
| 350 | |
| 351 /* If we crashed while processing an ASM statement, then be a little more | |
| 352 graceful. It's most likely the user's fault. */ | |
| 353 if (this_is_asm_operands) | |
| 354 { | |
| 355 output_operand_lossage ("unrecoverable error"); | |
| 356 exit (FATAL_EXIT_CODE); | |
| 357 } | |
| 358 | |
| 359 internal_error ("%s", strsignal (signo)); | |
| 360 } | |
| 361 | |
| 362 /* A subroutine of wrapup_global_declarations. We've come to the end of | |
| 363 the compilation unit. All deferred variables should be undeferred, | |
| 364 and all incomplete decls should be finalized. */ | |
| 365 | |
| 366 void | |
| 367 wrapup_global_declaration_1 (tree decl) | |
| 368 { | |
| 369 /* We're not deferring this any longer. Assignment is conditional to | |
| 370 avoid needlessly dirtying PCH pages. */ | |
| 371 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS) | |
| 372 && DECL_DEFER_OUTPUT (decl) != 0) | |
| 373 DECL_DEFER_OUTPUT (decl) = 0; | |
| 374 | |
| 375 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0) | |
| 376 lang_hooks.finish_incomplete_decl (decl); | |
| 377 } | |
| 378 | |
| 379 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL | |
| 380 needs to be output. Return true if it is output. */ | |
| 381 | |
| 382 bool | |
| 383 wrapup_global_declaration_2 (tree decl) | |
| 384 { | |
| 385 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl)) | |
| 386 return false; | |
| 387 | |
| 388 /* Don't write out static consts, unless we still need them. | |
| 389 | |
| 390 We also keep static consts if not optimizing (for debugging), | |
| 391 unless the user specified -fno-keep-static-consts. | |
| 392 ??? They might be better written into the debug information. | |
| 393 This is possible when using DWARF. | |
| 394 | |
| 395 A language processor that wants static constants to be always | |
| 396 written out (even if it is not used) is responsible for | |
| 397 calling rest_of_decl_compilation itself. E.g. the C front-end | |
| 398 calls rest_of_decl_compilation from finish_decl. | |
| 399 One motivation for this is that is conventional in some | |
| 400 environments to write things like: | |
| 401 static const char rcsid[] = "... version string ..."; | |
| 402 intending to force the string to be in the executable. | |
| 403 | |
| 404 A language processor that would prefer to have unneeded | |
| 405 static constants "optimized away" would just defer writing | |
| 406 them out until here. E.g. C++ does this, because static | |
| 407 constants are often defined in header files. | |
| 408 | |
| 409 ??? A tempting alternative (for both C and C++) would be | |
| 410 to force a constant to be written if and only if it is | |
| 411 defined in a main file, as opposed to an include file. */ | |
| 412 | |
| 413 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)) | |
| 414 { | |
| 415 struct varpool_node *node; | |
| 416 bool needed = true; | |
|
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417 node = varpool_get_node (decl); |
| 0 | 418 |
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419 if (!node && flag_ltrans) |
| 0 | 420 needed = false; |
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421 else if (node && node->finalized) |
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422 needed = false; |
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423 else if (node && node->alias) |
| 0 | 424 needed = false; |
| 425 else if (!cgraph_global_info_ready | |
| 426 && (TREE_USED (decl) | |
| 427 || TREE_USED (DECL_ASSEMBLER_NAME (decl)))) | |
| 428 /* needed */; | |
|
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429 else if (node && node->needed) |
| 0 | 430 /* needed */; |
| 431 else if (DECL_COMDAT (decl)) | |
| 432 needed = false; | |
| 433 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl) | |
| 434 && (optimize || !flag_keep_static_consts | |
| 435 || DECL_ARTIFICIAL (decl))) | |
| 436 needed = false; | |
| 437 | |
| 438 if (needed) | |
| 439 { | |
| 440 rest_of_decl_compilation (decl, 1, 1); | |
| 441 return true; | |
| 442 } | |
| 443 } | |
| 444 | |
| 445 return false; | |
| 446 } | |
| 447 | |
| 448 /* Do any final processing required for the declarations in VEC, of | |
| 449 which there are LEN. We write out inline functions and variables | |
| 450 that have been deferred until this point, but which are required. | |
| 451 Returns nonzero if anything was put out. */ | |
| 452 | |
| 453 bool | |
| 454 wrapup_global_declarations (tree *vec, int len) | |
| 455 { | |
| 456 bool reconsider, output_something = false; | |
| 457 int i; | |
| 458 | |
| 459 for (i = 0; i < len; i++) | |
| 460 wrapup_global_declaration_1 (vec[i]); | |
| 461 | |
| 462 /* Now emit any global variables or functions that we have been | |
| 463 putting off. We need to loop in case one of the things emitted | |
| 464 here references another one which comes earlier in the list. */ | |
| 465 do | |
| 466 { | |
| 467 reconsider = false; | |
| 468 for (i = 0; i < len; i++) | |
| 469 reconsider |= wrapup_global_declaration_2 (vec[i]); | |
| 470 if (reconsider) | |
| 471 output_something = true; | |
| 472 } | |
| 473 while (reconsider); | |
| 474 | |
| 475 return output_something; | |
| 476 } | |
| 477 | |
| 478 /* A subroutine of check_global_declarations. Issue appropriate warnings | |
| 479 for the global declaration DECL. */ | |
| 480 | |
| 481 void | |
| 482 check_global_declaration_1 (tree decl) | |
| 483 { | |
| 484 /* Warn about any function declared static but not defined. We don't | |
| 485 warn about variables, because many programs have static variables | |
| 486 that exist only to get some text into the object file. */ | |
| 487 if (TREE_CODE (decl) == FUNCTION_DECL | |
| 488 && DECL_INITIAL (decl) == 0 | |
| 489 && DECL_EXTERNAL (decl) | |
| 490 && ! DECL_ARTIFICIAL (decl) | |
| 491 && ! TREE_NO_WARNING (decl) | |
| 492 && ! TREE_PUBLIC (decl) | |
| 493 && (warn_unused_function | |
| 494 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))) | |
| 495 { | |
| 496 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))) | |
| 497 pedwarn (input_location, 0, "%q+F used but never defined", decl); | |
| 498 else | |
| 499 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl); | |
| 500 /* This symbol is effectively an "extern" declaration now. */ | |
| 501 TREE_PUBLIC (decl) = 1; | |
| 502 assemble_external (decl); | |
| 503 } | |
| 504 | |
| 505 /* Warn about static fns or vars defined but not used. */ | |
| 506 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL) | |
| 507 /* We don't warn about "static const" variables because the | |
| 508 "rcs_id" idiom uses that construction. */ | |
| 509 || (warn_unused_variable | |
| 510 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl))) | |
| 511 && ! DECL_IN_SYSTEM_HEADER (decl) | |
| 512 && ! TREE_USED (decl) | |
| 513 /* The TREE_USED bit for file-scope decls is kept in the identifier, | |
| 514 to handle multiple external decls in different scopes. */ | |
| 515 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))) | |
| 516 && ! DECL_EXTERNAL (decl) | |
| 517 && ! TREE_PUBLIC (decl) | |
| 518 /* A volatile variable might be used in some non-obvious way. */ | |
| 519 && ! TREE_THIS_VOLATILE (decl) | |
| 520 /* Global register variables must be declared to reserve them. */ | |
| 521 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl)) | |
| 522 /* Otherwise, ask the language. */ | |
| 523 && lang_hooks.decls.warn_unused_global (decl)) | |
|
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524 warning ((TREE_CODE (decl) == FUNCTION_DECL) |
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525 ? OPT_Wunused_function |
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526 : OPT_Wunused_variable, |
| 0 | 527 "%q+D defined but not used", decl); |
| 528 } | |
| 529 | |
| 530 /* Issue appropriate warnings for the global declarations in VEC (of | |
| 531 which there are LEN). */ | |
| 532 | |
| 533 void | |
| 534 check_global_declarations (tree *vec, int len) | |
| 535 { | |
| 536 int i; | |
| 537 | |
| 538 for (i = 0; i < len; i++) | |
| 539 check_global_declaration_1 (vec[i]); | |
| 540 } | |
| 541 | |
| 542 /* Emit debugging information for all global declarations in VEC. */ | |
| 543 | |
| 544 void | |
| 545 emit_debug_global_declarations (tree *vec, int len) | |
| 546 { | |
| 547 int i; | |
| 548 | |
| 549 /* Avoid confusing the debug information machinery when there are errors. */ | |
|
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550 if (seen_error ()) |
| 0 | 551 return; |
| 552 | |
| 553 timevar_push (TV_SYMOUT); | |
| 554 for (i = 0; i < len; i++) | |
| 555 debug_hooks->global_decl (vec[i]); | |
| 556 timevar_pop (TV_SYMOUT); | |
| 557 } | |
| 558 | |
| 559 /* Compile an entire translation unit. Write a file of assembly | |
| 560 output and various debugging dumps. */ | |
| 561 | |
| 562 static void | |
| 563 compile_file (void) | |
| 564 { | |
| 565 /* Initialize yet another pass. */ | |
| 566 | |
| 567 ggc_protect_identifiers = true; | |
| 568 | |
| 569 init_cgraph (); | |
| 570 init_final (main_input_filename); | |
| 571 coverage_init (aux_base_name); | |
| 572 statistics_init (); | |
|
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573 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL); |
| 0 | 574 |
| 575 timevar_push (TV_PARSE); | |
| 576 | |
| 577 /* Call the parser, which parses the entire file (calling | |
| 578 rest_of_compilation for each function). */ | |
|
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579 lang_hooks.parse_file (); |
| 0 | 580 |
| 581 /* Compilation is now finished except for writing | |
| 582 what's left of the symbol table output. */ | |
| 583 timevar_pop (TV_PARSE); | |
| 584 | |
|
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585 if (flag_syntax_only || flag_wpa) |
| 0 | 586 return; |
| 587 | |
| 588 ggc_protect_identifiers = false; | |
| 589 | |
|
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590 /* This must also call cgraph_finalize_compilation_unit. */ |
| 0 | 591 lang_hooks.decls.final_write_globals (); |
| 592 | |
|
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593 if (seen_error ()) |
| 0 | 594 return; |
| 595 | |
| 596 varpool_assemble_pending_decls (); | |
| 597 finish_aliases_2 (); | |
| 598 | |
| 599 /* Likewise for mudflap static object registrations. */ | |
| 600 if (flag_mudflap) | |
| 601 mudflap_finish_file (); | |
| 602 | |
| 603 output_shared_constant_pool (); | |
| 604 output_object_blocks (); | |
| 605 | |
| 606 /* Write out any pending weak symbol declarations. */ | |
| 607 weak_finish (); | |
| 608 | |
|
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609 /* This must be at the end before unwind and debug info. |
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610 Some target ports emit PIC setup thunks here. */ |
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611 targetm.asm_out.code_end (); |
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612 |
| 0 | 613 /* Do dbx symbols. */ |
| 614 timevar_push (TV_SYMOUT); | |
| 615 | |
| 616 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO | |
| 617 if (dwarf2out_do_frame ()) | |
| 618 dwarf2out_frame_finish (); | |
| 619 #endif | |
| 620 | |
| 621 (*debug_hooks->finish) (main_input_filename); | |
| 622 timevar_pop (TV_SYMOUT); | |
| 623 | |
| 624 /* Output some stuff at end of file if nec. */ | |
| 625 | |
| 626 dw2_output_indirect_constants (); | |
| 627 | |
| 628 /* Flush any pending external directives. */ | |
| 629 process_pending_assemble_externals (); | |
| 630 | |
|
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631 /* Emit LTO marker if LTO info has been previously emitted. This is |
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632 used by collect2 to determine whether an object file contains IL. |
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633 We used to emit an undefined reference here, but this produces |
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634 link errors if an object file with IL is stored into a shared |
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635 library without invoking lto1. */ |
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636 if (flag_generate_lto) |
|
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637 { |
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638 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON |
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639 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE, |
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640 "__gnu_lto_v1", |
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641 (unsigned HOST_WIDE_INT) 1, 8); |
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642 #elif defined ASM_OUTPUT_ALIGNED_COMMON |
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643 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1", |
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644 (unsigned HOST_WIDE_INT) 1, 8); |
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645 #else |
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646 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1", |
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647 (unsigned HOST_WIDE_INT) 1, |
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648 (unsigned HOST_WIDE_INT) 1); |
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649 #endif |
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650 } |
|
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651 |
| 0 | 652 /* Attach a special .ident directive to the end of the file to identify |
| 653 the version of GCC which compiled this code. The format of the .ident | |
| 654 string is patterned after the ones produced by native SVR4 compilers. */ | |
| 655 #ifdef IDENT_ASM_OP | |
| 656 if (!flag_no_ident) | |
| 657 { | |
| 658 const char *pkg_version = "(GNU) "; | |
| 659 | |
| 660 if (strcmp ("(GCC) ", pkgversion_string)) | |
| 661 pkg_version = pkgversion_string; | |
| 662 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n", | |
| 663 IDENT_ASM_OP, pkg_version, version_string); | |
| 664 } | |
| 665 #endif | |
| 666 | |
|
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667 /* Invoke registered plugin callbacks. */ |
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668 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL); |
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669 |
| 0 | 670 /* This must be at the end. Some target ports emit end of file directives |
| 671 into the assembly file here, and hence we can not output anything to the | |
| 672 assembly file after this point. */ | |
| 673 targetm.asm_out.file_end (); | |
| 674 } | |
| 675 | |
| 676 /* Indexed by enum debug_info_type. */ | |
| 677 const char *const debug_type_names[] = | |
| 678 { | |
| 679 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms" | |
| 680 }; | |
| 681 | |
| 682 /* Print version information to FILE. | |
| 683 Each line begins with INDENT (for the case where FILE is the | |
| 684 assembler output file). */ | |
| 685 | |
| 686 void | |
| 687 print_version (FILE *file, const char *indent) | |
| 688 { | |
| 689 static const char fmt1[] = | |
| 690 #ifdef __GNUC__ | |
| 691 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ") | |
| 692 #else | |
| 693 N_("%s%s%s %sversion %s (%s) compiled by CC, ") | |
| 694 #endif | |
| 695 ; | |
| 696 static const char fmt2[] = | |
|
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697 N_("GMP version %s, MPFR version %s, MPC version %s\n"); |
| 0 | 698 static const char fmt3[] = |
| 699 N_("%s%swarning: %s header version %s differs from library version %s.\n"); | |
| 700 static const char fmt4[] = | |
| 701 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n"); | |
| 702 #ifndef __VERSION__ | |
| 703 #define __VERSION__ "[?]" | |
| 704 #endif | |
| 705 fprintf (file, | |
| 706 file == stderr ? _(fmt1) : fmt1, | |
| 707 indent, *indent != 0 ? " " : "", | |
| 708 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME, | |
| 709 indent, __VERSION__); | |
| 710 | |
| 711 /* We need to stringify the GMP macro values. Ugh, gmp_version has | |
|
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712 two string formats, "i.j.k" and "i.j" when k is zero. As of |
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713 gmp-4.3.0, GMP always uses the 3 number format. */ |
| 0 | 714 #define GCC_GMP_STRINGIFY_VERSION3(X) #X |
| 715 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X) | |
|
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716 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z)) |
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717 #define GCC_GMP_VERSION \ |
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718 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL) |
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719 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0 |
| 0 | 720 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \ |
| 721 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) | |
| 722 #else | |
| 723 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \ | |
| 724 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \ | |
| 725 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL) | |
| 726 #endif | |
| 727 fprintf (file, | |
| 728 file == stderr ? _(fmt2) : fmt2, | |
|
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729 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING); |
| 0 | 730 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version)) |
| 731 fprintf (file, | |
| 732 file == stderr ? _(fmt3) : fmt3, | |
| 733 indent, *indent != 0 ? " " : "", | |
| 734 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version); | |
| 735 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ())) | |
| 736 fprintf (file, | |
| 737 file == stderr ? _(fmt3) : fmt3, | |
| 738 indent, *indent != 0 ? " " : "", | |
| 739 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ()); | |
|
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740 if (strcmp (MPC_VERSION_STRING, mpc_get_version ())) |
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741 fprintf (file, |
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742 file == stderr ? _(fmt3) : fmt3, |
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743 indent, *indent != 0 ? " " : "", |
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744 "MPC", MPC_VERSION_STRING, mpc_get_version ()); |
| 0 | 745 fprintf (file, |
| 746 file == stderr ? _(fmt4) : fmt4, | |
| 747 indent, *indent != 0 ? " " : "", | |
| 748 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE)); | |
|
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749 |
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750 print_plugins_versions (file, indent); |
| 0 | 751 } |
| 752 | |
| 753 #ifdef ASM_COMMENT_START | |
| 754 static int | |
| 755 print_to_asm_out_file (print_switch_type type, const char * text) | |
| 756 { | |
| 757 bool prepend_sep = true; | |
| 758 | |
| 759 switch (type) | |
| 760 { | |
| 761 case SWITCH_TYPE_LINE_END: | |
| 762 putc ('\n', asm_out_file); | |
| 763 return 1; | |
| 764 | |
| 765 case SWITCH_TYPE_LINE_START: | |
| 766 fputs (ASM_COMMENT_START, asm_out_file); | |
| 767 return strlen (ASM_COMMENT_START); | |
| 768 | |
| 769 case SWITCH_TYPE_DESCRIPTIVE: | |
| 770 if (ASM_COMMENT_START[0] == 0) | |
| 771 prepend_sep = false; | |
| 772 /* Drop through. */ | |
| 773 case SWITCH_TYPE_PASSED: | |
| 774 case SWITCH_TYPE_ENABLED: | |
| 775 if (prepend_sep) | |
| 776 fputc (' ', asm_out_file); | |
|
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777 fputs (text, asm_out_file); |
| 0 | 778 /* No need to return the length here as |
| 779 print_single_switch has already done it. */ | |
| 780 return 0; | |
| 781 | |
| 782 default: | |
| 783 return -1; | |
| 784 } | |
| 785 } | |
| 786 #endif | |
| 787 | |
| 788 static int | |
| 789 print_to_stderr (print_switch_type type, const char * text) | |
| 790 { | |
| 791 switch (type) | |
| 792 { | |
| 793 case SWITCH_TYPE_LINE_END: | |
| 794 putc ('\n', stderr); | |
| 795 return 1; | |
| 796 | |
| 797 case SWITCH_TYPE_LINE_START: | |
| 798 return 0; | |
|
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799 |
| 0 | 800 case SWITCH_TYPE_PASSED: |
| 801 case SWITCH_TYPE_ENABLED: | |
| 802 fputc (' ', stderr); | |
| 803 /* Drop through. */ | |
| 804 | |
| 805 case SWITCH_TYPE_DESCRIPTIVE: | |
|
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806 fputs (text, stderr); |
| 0 | 807 /* No need to return the length here as |
| 808 print_single_switch has already done it. */ | |
| 809 return 0; | |
| 810 | |
| 811 default: | |
| 812 return -1; | |
| 813 } | |
| 814 } | |
| 815 | |
| 816 /* Print an option value and return the adjusted position in the line. | |
| 817 ??? print_fn doesn't handle errors, eg disk full; presumably other | |
| 818 code will catch a disk full though. */ | |
| 819 | |
| 820 static int | |
| 821 print_single_switch (print_switch_fn_type print_fn, | |
| 822 int pos, | |
| 823 print_switch_type type, | |
| 824 const char * text) | |
| 825 { | |
| 826 /* The ultrix fprintf returns 0 on success, so compute the result | |
| 827 we want here since we need it for the following test. The +1 | |
| 828 is for the separator character that will probably be emitted. */ | |
| 829 int len = strlen (text) + 1; | |
| 830 | |
| 831 if (pos != 0 | |
| 832 && pos + len > MAX_LINE) | |
| 833 { | |
| 834 print_fn (SWITCH_TYPE_LINE_END, NULL); | |
| 835 pos = 0; | |
| 836 } | |
| 837 | |
| 838 if (pos == 0) | |
| 839 pos += print_fn (SWITCH_TYPE_LINE_START, NULL); | |
| 840 | |
| 841 print_fn (type, text); | |
| 842 return pos + len; | |
| 843 } | |
| 844 | |
| 845 /* Print active target switches using PRINT_FN. | |
| 846 POS is the current cursor position and MAX is the size of a "line". | |
| 847 Each line begins with INDENT and ends with TERM. | |
| 848 Each switch is separated from the next by SEP. */ | |
| 849 | |
| 850 static void | |
| 851 print_switch_values (print_switch_fn_type print_fn) | |
| 852 { | |
| 853 int pos = 0; | |
| 854 size_t j; | |
| 855 | |
| 856 /* Fill in the -frandom-seed option, if the user didn't pass it, so | |
| 857 that it can be printed below. This helps reproducibility. */ | |
| 858 if (!flag_random_seed) | |
| 859 init_random_seed (); | |
| 860 | |
| 861 /* Print the options as passed. */ | |
| 862 pos = print_single_switch (print_fn, pos, | |
| 863 SWITCH_TYPE_DESCRIPTIVE, _("options passed: ")); | |
| 864 | |
|
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865 for (j = 1; j < save_decoded_options_count; j++) |
| 0 | 866 { |
|
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867 switch (save_decoded_options[j].opt_index) |
| 0 | 868 { |
|
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869 case OPT_o: |
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870 case OPT_d: |
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871 case OPT_dumpbase: |
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872 case OPT_dumpdir: |
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873 case OPT_auxbase: |
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874 case OPT_quiet: |
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875 case OPT_version: |
| 0 | 876 /* Ignore these. */ |
|
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877 continue; |
| 0 | 878 } |
| 879 | |
|
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880 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, |
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881 save_decoded_options[j].orig_option_with_args_text); |
| 0 | 882 } |
| 883 | |
| 884 if (pos > 0) | |
| 885 print_fn (SWITCH_TYPE_LINE_END, NULL); | |
| 886 | |
| 887 /* Print the -f and -m options that have been enabled. | |
| 888 We don't handle language specific options but printing argv | |
| 889 should suffice. */ | |
| 890 pos = print_single_switch (print_fn, 0, | |
| 891 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: ")); | |
| 892 | |
| 893 for (j = 0; j < cl_options_count; j++) | |
| 894 if ((cl_options[j].flags & CL_REPORT) | |
|
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895 && option_enabled (j, &global_options) > 0) |
| 0 | 896 pos = print_single_switch (print_fn, pos, |
| 897 SWITCH_TYPE_ENABLED, cl_options[j].opt_text); | |
| 898 | |
| 899 print_fn (SWITCH_TYPE_LINE_END, NULL); | |
| 900 } | |
| 901 | |
| 902 /* Open assembly code output file. Do this even if -fsyntax-only is | |
| 903 on, because then the driver will have provided the name of a | |
| 904 temporary file or bit bucket for us. NAME is the file specified on | |
| 905 the command line, possibly NULL. */ | |
| 906 static void | |
| 907 init_asm_output (const char *name) | |
| 908 { | |
| 909 if (name == NULL && asm_file_name == 0) | |
| 910 asm_out_file = stdout; | |
| 911 else | |
| 912 { | |
| 913 if (asm_file_name == 0) | |
| 914 { | |
| 915 int len = strlen (dump_base_name); | |
| 916 char *dumpname = XNEWVEC (char, len + 6); | |
| 917 | |
| 918 memcpy (dumpname, dump_base_name, len + 1); | |
| 919 strip_off_ending (dumpname, len); | |
| 920 strcat (dumpname, ".s"); | |
| 921 asm_file_name = dumpname; | |
| 922 } | |
| 923 if (!strcmp (asm_file_name, "-")) | |
| 924 asm_out_file = stdout; | |
| 925 else | |
| 926 asm_out_file = fopen (asm_file_name, "w+b"); | |
| 927 if (asm_out_file == 0) | |
| 928 fatal_error ("can%'t open %s for writing: %m", asm_file_name); | |
| 929 } | |
| 930 | |
| 931 if (!flag_syntax_only) | |
| 932 { | |
| 933 targetm.asm_out.file_start (); | |
| 934 | |
| 935 if (flag_record_gcc_switches) | |
| 936 { | |
| 937 if (targetm.asm_out.record_gcc_switches) | |
| 938 { | |
| 939 /* Let the target know that we are about to start recording. */ | |
| 940 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE, | |
| 941 NULL); | |
| 942 /* Now record the switches. */ | |
| 943 print_switch_values (targetm.asm_out.record_gcc_switches); | |
| 944 /* Let the target know that the recording is over. */ | |
| 945 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE, | |
| 946 NULL); | |
| 947 } | |
| 948 else | |
| 949 inform (input_location, "-frecord-gcc-switches is not supported by the current target"); | |
| 950 } | |
| 951 | |
| 952 #ifdef ASM_COMMENT_START | |
| 953 if (flag_verbose_asm) | |
| 954 { | |
| 955 /* Print the list of switches in effect | |
| 956 into the assembler file as comments. */ | |
| 957 print_version (asm_out_file, ASM_COMMENT_START); | |
| 958 print_switch_values (print_to_asm_out_file); | |
|
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959 putc ('\n', asm_out_file); |
| 0 | 960 } |
| 961 #endif | |
| 962 } | |
| 963 } | |
| 964 | |
| 965 /* Default tree printer. Handles declarations only. */ | |
|
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966 bool |
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967 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec, |
| 0 | 968 int precision, bool wide, bool set_locus, bool hash) |
| 969 { | |
| 970 tree t; | |
| 971 | |
| 972 /* FUTURE: %+x should set the locus. */ | |
| 973 if (precision != 0 || wide || hash) | |
| 974 return false; | |
| 975 | |
| 976 switch (*spec) | |
| 977 { | |
|
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978 case 'E': |
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979 t = va_arg (*text->args_ptr, tree); |
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980 if (TREE_CODE (t) == IDENTIFIER_NODE) |
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981 { |
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982 pp_identifier (pp, IDENTIFIER_POINTER (t)); |
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983 return true; |
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984 } |
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985 break; |
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986 |
| 0 | 987 case 'D': |
| 988 t = va_arg (*text->args_ptr, tree); | |
| 989 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t)) | |
| 990 t = DECL_DEBUG_EXPR (t); | |
| 991 break; | |
| 992 | |
| 993 case 'F': | |
| 994 case 'T': | |
| 995 t = va_arg (*text->args_ptr, tree); | |
| 996 break; | |
| 997 | |
|
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998 case 'K': |
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999 percent_K_format (text); |
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1000 return true; |
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1001 |
| 0 | 1002 default: |
| 1003 return false; | |
| 1004 } | |
| 1005 | |
| 1006 if (set_locus && text->locus) | |
| 1007 *text->locus = DECL_SOURCE_LOCATION (t); | |
| 1008 | |
| 1009 if (DECL_P (t)) | |
| 1010 { | |
| 1011 const char *n = DECL_NAME (t) | |
|
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1012 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2)) |
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1013 : _("<anonymous>"); |
| 0 | 1014 pp_string (pp, n); |
| 1015 } | |
| 1016 else | |
| 1017 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0); | |
| 1018 | |
| 1019 return true; | |
| 1020 } | |
| 1021 | |
| 1022 /* A helper function; used as the reallocator function for cpp's line | |
| 1023 table. */ | |
| 1024 static void * | |
| 1025 realloc_for_line_map (void *ptr, size_t len) | |
| 1026 { | |
|
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1027 return GGC_RESIZEVAR (void, ptr, len); |
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1028 } |
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1029 |
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1030 /* A helper function: used as the allocator function for |
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1031 identifier_to_locale. */ |
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1032 static void * |
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1033 alloc_for_identifier_to_locale (size_t len) |
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1034 { |
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1035 return ggc_alloc_atomic (len); |
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1036 } |
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1037 |
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1038 /* Output stack usage information. */ |
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1039 void |
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1040 output_stack_usage (void) |
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1041 { |
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1042 static bool warning_issued = false; |
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1043 enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED }; |
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1044 const char *stack_usage_kind_str[] = { |
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1045 "static", |
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1046 "dynamic", |
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1047 "dynamic,bounded" |
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1048 }; |
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1049 HOST_WIDE_INT stack_usage = current_function_static_stack_size; |
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1050 enum stack_usage_kind_type stack_usage_kind; |
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1051 expanded_location loc; |
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1052 const char *raw_id, *id; |
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1053 |
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1054 if (stack_usage < 0) |
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1055 { |
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1056 if (!warning_issued) |
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1057 { |
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1058 warning (0, "-fstack-usage not supported for this target"); |
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1059 warning_issued = true; |
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1060 } |
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1061 return; |
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1062 } |
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1063 |
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1064 stack_usage_kind = STATIC; |
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1065 |
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1066 /* Add the maximum amount of space pushed onto the stack. */ |
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1067 if (current_function_pushed_stack_size > 0) |
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1068 { |
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1069 stack_usage += current_function_pushed_stack_size; |
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1070 stack_usage_kind = DYNAMIC_BOUNDED; |
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1071 } |
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1072 |
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1073 /* Now on to the tricky part: dynamic stack allocation. */ |
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1074 if (current_function_allocates_dynamic_stack_space) |
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1075 { |
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1076 if (current_function_has_unbounded_dynamic_stack_size) |
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1077 stack_usage_kind = DYNAMIC; |
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1078 else |
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1079 stack_usage_kind = DYNAMIC_BOUNDED; |
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1080 |
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1081 /* Add the size even in the unbounded case, this can't hurt. */ |
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1082 stack_usage += current_function_dynamic_stack_size; |
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1083 } |
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1084 |
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1085 loc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
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1086 |
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1087 /* Strip the scope prefix if any. */ |
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1088 raw_id = lang_hooks.decl_printable_name (current_function_decl, 2); |
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1089 id = strrchr (raw_id, '.'); |
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1090 if (id) |
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1091 id++; |
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1092 else |
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1093 id = raw_id; |
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1094 |
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1095 fprintf (stack_usage_file, |
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1096 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC"\t%s\n", |
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1097 lbasename (loc.file), |
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1098 loc.line, |
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1099 loc.column, |
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1100 id, |
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1101 stack_usage, |
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1102 stack_usage_kind_str[stack_usage_kind]); |
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1103 } |
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1104 |
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1105 /* Open an auxiliary output file. */ |
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1106 static FILE * |
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1107 open_auxiliary_file (const char *ext) |
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1108 { |
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1109 char *filename; |
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1110 FILE *file; |
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1111 |
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1112 filename = concat (aux_base_name, ".", ext, NULL); |
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1113 file = fopen (filename, "w"); |
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1114 if (!file) |
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1115 fatal_error ("can%'t open %s for writing: %m", filename); |
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1116 free (filename); |
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1117 return file; |
| 0 | 1118 } |
| 1119 | |
| 1120 /* Initialization of the front end environment, before command line | |
| 1121 options are parsed. Signal handlers, internationalization etc. | |
| 1122 ARGV0 is main's argv[0]. */ | |
| 1123 static void | |
| 1124 general_init (const char *argv0) | |
| 1125 { | |
| 1126 const char *p; | |
| 1127 | |
| 1128 p = argv0 + strlen (argv0); | |
| 1129 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1])) | |
| 1130 --p; | |
| 1131 progname = p; | |
| 1132 | |
| 1133 xmalloc_set_program_name (progname); | |
| 1134 | |
| 1135 hex_init (); | |
| 1136 | |
| 1137 /* Unlock the stdio streams. */ | |
| 1138 unlock_std_streams (); | |
| 1139 | |
| 1140 gcc_init_libintl (); | |
| 1141 | |
|
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1142 identifier_to_locale_alloc = alloc_for_identifier_to_locale; |
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1143 identifier_to_locale_free = ggc_free; |
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1144 |
| 0 | 1145 /* Initialize the diagnostics reporting machinery, so option parsing |
| 1146 can give warnings and errors. */ | |
|
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1147 diagnostic_initialize (global_dc, N_OPTS); |
|
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1148 diagnostic_starter (global_dc) = default_tree_diagnostic_starter; |
| 0 | 1149 /* Set a default printer. Language specific initializations will |
| 1150 override it later. */ | |
| 1151 pp_format_decoder (global_dc->printer) = &default_tree_printer; | |
|
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1152 global_dc->show_option_requested |
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1153 = global_options_init.x_flag_diagnostics_show_option; |
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1154 global_dc->show_column |
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1155 = global_options_init.x_flag_show_column; |
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1156 global_dc->internal_error = plugins_internal_error_function; |
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1157 global_dc->option_enabled = option_enabled; |
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1158 global_dc->option_state = &global_options; |
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1159 global_dc->option_name = option_name; |
| 0 | 1160 |
| 1161 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */ | |
| 1162 #ifdef SIGSEGV | |
| 1163 signal (SIGSEGV, crash_signal); | |
| 1164 #endif | |
| 1165 #ifdef SIGILL | |
| 1166 signal (SIGILL, crash_signal); | |
| 1167 #endif | |
| 1168 #ifdef SIGBUS | |
| 1169 signal (SIGBUS, crash_signal); | |
| 1170 #endif | |
| 1171 #ifdef SIGABRT | |
| 1172 signal (SIGABRT, crash_signal); | |
| 1173 #endif | |
| 1174 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT) | |
| 1175 signal (SIGIOT, crash_signal); | |
| 1176 #endif | |
| 1177 #ifdef SIGFPE | |
| 1178 signal (SIGFPE, crash_signal); | |
| 1179 #endif | |
| 1180 | |
| 1181 /* Other host-specific signal setup. */ | |
| 1182 (*host_hooks.extra_signals)(); | |
| 1183 | |
| 1184 /* Initialize the garbage-collector, string pools and tree type hash | |
| 1185 table. */ | |
| 1186 init_ggc (); | |
| 1187 init_stringpool (); | |
|
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1188 line_table = ggc_alloc_line_maps (); |
| 0 | 1189 linemap_init (line_table); |
| 1190 line_table->reallocator = realloc_for_line_map; | |
| 1191 init_ttree (); | |
| 1192 | |
| 1193 /* Initialize register usage now so switches may override. */ | |
| 1194 init_reg_sets (); | |
| 1195 | |
| 1196 /* Register the language-independent parameters. */ | |
| 1197 add_params (lang_independent_params, LAST_PARAM); | |
|
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1198 targetm.target_option.default_params (); |
| 0 | 1199 |
| 1200 /* This must be done after add_params but before argument processing. */ | |
| 1201 init_ggc_heuristics(); | |
| 1202 init_optimization_passes (); | |
| 1203 statistics_early_init (); | |
|
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1204 finish_params (); |
| 0 | 1205 } |
| 1206 | |
| 1207 /* Return true if the current target supports -fsection-anchors. */ | |
| 1208 | |
| 1209 static bool | |
| 1210 target_supports_section_anchors_p (void) | |
| 1211 { | |
| 1212 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0) | |
| 1213 return false; | |
| 1214 | |
| 1215 if (targetm.asm_out.output_anchor == NULL) | |
| 1216 return false; | |
| 1217 | |
| 1218 return true; | |
| 1219 } | |
| 1220 | |
| 1221 /* Default the align_* variables to 1 if they're still unset, and | |
| 1222 set up the align_*_log variables. */ | |
| 1223 static void | |
| 1224 init_alignments (void) | |
| 1225 { | |
| 1226 if (align_loops <= 0) | |
| 1227 align_loops = 1; | |
| 1228 if (align_loops_max_skip > align_loops) | |
| 1229 align_loops_max_skip = align_loops - 1; | |
| 1230 align_loops_log = floor_log2 (align_loops * 2 - 1); | |
| 1231 if (align_jumps <= 0) | |
| 1232 align_jumps = 1; | |
| 1233 if (align_jumps_max_skip > align_jumps) | |
| 1234 align_jumps_max_skip = align_jumps - 1; | |
| 1235 align_jumps_log = floor_log2 (align_jumps * 2 - 1); | |
| 1236 if (align_labels <= 0) | |
| 1237 align_labels = 1; | |
| 1238 align_labels_log = floor_log2 (align_labels * 2 - 1); | |
| 1239 if (align_labels_max_skip > align_labels) | |
| 1240 align_labels_max_skip = align_labels - 1; | |
| 1241 if (align_functions <= 0) | |
| 1242 align_functions = 1; | |
| 1243 align_functions_log = floor_log2 (align_functions * 2 - 1); | |
| 1244 } | |
| 1245 | |
| 1246 /* Process the options that have been parsed. */ | |
| 1247 static void | |
| 1248 process_options (void) | |
| 1249 { | |
| 1250 /* Just in case lang_hooks.post_options ends up calling a debug_hook. | |
| 1251 This can happen with incorrect pre-processed input. */ | |
| 1252 debug_hooks = &do_nothing_debug_hooks; | |
| 1253 | |
|
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1254 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT; |
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1255 |
| 0 | 1256 /* This replaces set_Wunused. */ |
| 1257 if (warn_unused_function == -1) | |
| 1258 warn_unused_function = warn_unused; | |
| 1259 if (warn_unused_label == -1) | |
| 1260 warn_unused_label = warn_unused; | |
| 1261 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */ | |
| 1262 if (warn_unused_parameter == -1) | |
| 1263 warn_unused_parameter = (warn_unused && extra_warnings); | |
| 1264 if (warn_unused_variable == -1) | |
| 1265 warn_unused_variable = warn_unused; | |
|
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1266 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are |
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1267 enabled. */ |
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1268 if (warn_unused_but_set_parameter == -1) |
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1269 warn_unused_but_set_parameter = (warn_unused && extra_warnings); |
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1270 if (warn_unused_but_set_variable == -1) |
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1271 warn_unused_but_set_variable = warn_unused; |
| 0 | 1272 if (warn_unused_value == -1) |
| 1273 warn_unused_value = warn_unused; | |
| 1274 | |
|
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1275 /* This replaces set_Wextra. */ |
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1276 if (warn_uninitialized == -1) |
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1277 warn_uninitialized = extra_warnings; |
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1278 |
| 0 | 1279 /* Allow the front end to perform consistency checks and do further |
| 1280 initialization based on the command line options. This hook also | |
| 1281 sets the original filename if appropriate (e.g. foo.i -> foo.c) | |
| 1282 so we can correctly initialize debug output. */ | |
| 1283 no_backend = lang_hooks.post_options (&main_input_filename); | |
| 1284 | |
| 1285 /* Some machines may reject certain combinations of options. */ | |
|
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1286 targetm.target_option.override (); |
| 0 | 1287 |
|
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1288 /* Avoid any informative notes in the second run of -fcompare-debug. */ |
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1289 if (flag_compare_debug) |
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1290 diagnostic_inhibit_notes (global_dc); |
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1291 |
| 0 | 1292 if (flag_section_anchors && !target_supports_section_anchors_p ()) |
| 1293 { | |
| 1294 warning (OPT_fsection_anchors, | |
| 1295 "this target does not support %qs", "-fsection-anchors"); | |
| 1296 flag_section_anchors = 0; | |
| 1297 } | |
| 1298 | |
| 1299 if (flag_short_enums == 2) | |
| 1300 flag_short_enums = targetm.default_short_enums (); | |
| 1301 | |
| 1302 /* Set aux_base_name if not already set. */ | |
| 1303 if (aux_base_name) | |
| 1304 ; | |
| 1305 else if (main_input_filename) | |
| 1306 { | |
| 1307 char *name = xstrdup (lbasename (main_input_filename)); | |
| 1308 | |
| 1309 strip_off_ending (name, strlen (name)); | |
| 1310 aux_base_name = name; | |
| 1311 } | |
| 1312 else | |
| 1313 aux_base_name = "gccaux"; | |
| 1314 | |
| 1315 #ifndef HAVE_cloog | |
| 1316 if (flag_graphite | |
|
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1317 || flag_graphite_identity |
| 0 | 1318 || flag_loop_block |
|
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1319 || flag_loop_flatten |
| 0 | 1320 || flag_loop_interchange |
| 1321 || flag_loop_strip_mine | |
|
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1322 || flag_loop_parallelize_all) |
|
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1323 sorry ("Graphite loop optimizations cannot be used (-fgraphite, " |
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1324 "-fgraphite-identity, -floop-block, -floop-flatten, " |
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1325 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, " |
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1326 "and -ftree-loop-linear)"); |
| 0 | 1327 #endif |
| 1328 | |
| 1329 /* Unrolling all loops implies that standard loop unrolling must also | |
| 1330 be done. */ | |
| 1331 if (flag_unroll_all_loops) | |
| 1332 flag_unroll_loops = 1; | |
| 1333 | |
|
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1334 /* web and rename-registers help when run after loop unrolling. */ |
| 0 | 1335 if (flag_web == AUTODETECT_VALUE) |
| 1336 flag_web = flag_unroll_loops || flag_peel_loops; | |
|
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1337 |
| 0 | 1338 if (flag_rename_registers == AUTODETECT_VALUE) |
| 1339 flag_rename_registers = flag_unroll_loops || flag_peel_loops; | |
| 1340 | |
| 1341 if (flag_non_call_exceptions) | |
| 1342 flag_asynchronous_unwind_tables = 1; | |
| 1343 if (flag_asynchronous_unwind_tables) | |
| 1344 flag_unwind_tables = 1; | |
| 1345 | |
| 1346 if (flag_value_profile_transformations) | |
| 1347 flag_profile_values = 1; | |
| 1348 | |
| 1349 /* Warn about options that are not supported on this machine. */ | |
| 1350 #ifndef INSN_SCHEDULING | |
| 1351 if (flag_schedule_insns || flag_schedule_insns_after_reload) | |
| 1352 warning (0, "instruction scheduling not supported on this target machine"); | |
| 1353 #endif | |
| 1354 #ifndef DELAY_SLOTS | |
| 1355 if (flag_delayed_branch) | |
| 1356 warning (0, "this target machine does not have delayed branches"); | |
| 1357 #endif | |
| 1358 | |
| 1359 user_label_prefix = USER_LABEL_PREFIX; | |
| 1360 if (flag_leading_underscore != -1) | |
| 1361 { | |
| 1362 /* If the default prefix is more complicated than "" or "_", | |
| 1363 issue a warning and ignore this option. */ | |
| 1364 if (user_label_prefix[0] == 0 || | |
| 1365 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0)) | |
| 1366 { | |
| 1367 user_label_prefix = flag_leading_underscore ? "_" : ""; | |
| 1368 } | |
| 1369 else | |
| 1370 warning (0, "-f%sleading-underscore not supported on this target machine", | |
| 1371 flag_leading_underscore ? "" : "no-"); | |
| 1372 } | |
| 1373 | |
| 1374 /* If we are in verbose mode, write out the version and maybe all the | |
| 1375 option flags in use. */ | |
| 1376 if (version_flag) | |
| 1377 { | |
| 1378 print_version (stderr, ""); | |
| 1379 if (! quiet_flag) | |
| 1380 print_switch_values (print_to_stderr); | |
| 1381 } | |
| 1382 | |
| 1383 if (flag_syntax_only) | |
| 1384 { | |
| 1385 write_symbols = NO_DEBUG; | |
| 1386 profile_flag = 0; | |
| 1387 } | |
| 1388 | |
|
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1389 if (flag_gtoggle) |
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1390 { |
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1391 if (debug_info_level == DINFO_LEVEL_NONE) |
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1392 { |
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1393 debug_info_level = DINFO_LEVEL_NORMAL; |
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1394 |
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1395 if (write_symbols == NO_DEBUG) |
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1396 write_symbols = PREFERRED_DEBUGGING_TYPE; |
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1397 } |
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1398 else |
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1399 debug_info_level = DINFO_LEVEL_NONE; |
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1400 } |
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1401 |
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1402 if (flag_dump_final_insns && !flag_syntax_only && !no_backend) |
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1403 { |
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1404 FILE *final_output = fopen (flag_dump_final_insns, "w"); |
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1405 if (!final_output) |
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1406 { |
|
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1407 error ("could not open final insn dump file %qs: %m", |
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1408 flag_dump_final_insns); |
|
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1409 flag_dump_final_insns = NULL; |
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1410 } |
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1411 else if (fclose (final_output)) |
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1412 { |
|
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1413 error ("could not close zeroed insn dump file %qs: %m", |
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1414 flag_dump_final_insns); |
|
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1415 flag_dump_final_insns = NULL; |
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1416 } |
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1417 } |
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1418 |
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1419 /* Unless over-ridden for the target, assume that all DWARF levels |
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1420 may be emitted, if DWARF2_DEBUG is selected. */ |
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1421 if (dwarf_strict < 0) |
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1422 dwarf_strict = 0; |
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1423 |
| 0 | 1424 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging |
| 1425 level is 0. */ | |
| 1426 if (debug_info_level == DINFO_LEVEL_NONE) | |
| 1427 write_symbols = NO_DEBUG; | |
| 1428 | |
| 1429 if (write_symbols == NO_DEBUG) | |
| 1430 ; | |
| 1431 #if defined(DBX_DEBUGGING_INFO) | |
| 1432 else if (write_symbols == DBX_DEBUG) | |
| 1433 debug_hooks = &dbx_debug_hooks; | |
| 1434 #endif | |
| 1435 #if defined(XCOFF_DEBUGGING_INFO) | |
| 1436 else if (write_symbols == XCOFF_DEBUG) | |
| 1437 debug_hooks = &xcoff_debug_hooks; | |
| 1438 #endif | |
| 1439 #ifdef SDB_DEBUGGING_INFO | |
| 1440 else if (write_symbols == SDB_DEBUG) | |
| 1441 debug_hooks = &sdb_debug_hooks; | |
| 1442 #endif | |
| 1443 #ifdef DWARF2_DEBUGGING_INFO | |
| 1444 else if (write_symbols == DWARF2_DEBUG) | |
| 1445 debug_hooks = &dwarf2_debug_hooks; | |
| 1446 #endif | |
| 1447 #ifdef VMS_DEBUGGING_INFO | |
| 1448 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
| 1449 debug_hooks = &vmsdbg_debug_hooks; | |
| 1450 #endif | |
| 1451 else | |
| 1452 error ("target system does not support the \"%s\" debug format", | |
| 1453 debug_type_names[write_symbols]); | |
| 1454 | |
|
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1455 /* We know which debug output will be used so we can set flag_var_tracking |
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1456 and flag_var_tracking_uninit if the user has not specified them. */ |
| 0 | 1457 if (debug_info_level < DINFO_LEVEL_NORMAL |
| 1458 || debug_hooks->var_location == do_nothing_debug_hooks.var_location) | |
| 1459 { | |
| 1460 if (flag_var_tracking == 1 | |
| 1461 || flag_var_tracking_uninit == 1) | |
| 1462 { | |
| 1463 if (debug_info_level < DINFO_LEVEL_NORMAL) | |
| 1464 warning (0, "variable tracking requested, but useless unless " | |
| 1465 "producing debug info"); | |
| 1466 else | |
| 1467 warning (0, "variable tracking requested, but not supported " | |
| 1468 "by this debug format"); | |
| 1469 } | |
| 1470 flag_var_tracking = 0; | |
| 1471 flag_var_tracking_uninit = 0; | |
| 1472 } | |
| 1473 | |
|
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1474 /* The debug hooks are used to implement -fdump-go-spec because it |
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1475 gives a simple and stable API for all the information we need to |
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1476 dump. */ |
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1477 if (flag_dump_go_spec != NULL) |
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1478 debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks); |
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1479 |
|
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1480 /* If the user specifically requested variable tracking with tagging |
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1481 uninitialized variables, we need to turn on variable tracking. |
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1482 (We already determined above that variable tracking is feasible.) */ |
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1483 if (flag_var_tracking_uninit) |
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1484 flag_var_tracking = 1; |
| 0 | 1485 |
| 1486 if (flag_var_tracking == AUTODETECT_VALUE) | |
| 1487 flag_var_tracking = optimize >= 1; | |
| 1488 | |
|
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1489 if (flag_var_tracking_assignments == AUTODETECT_VALUE) |
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1490 flag_var_tracking_assignments = flag_var_tracking |
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1491 && !(flag_selective_scheduling || flag_selective_scheduling2); |
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1492 |
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1493 if (flag_var_tracking_assignments_toggle) |
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1494 flag_var_tracking_assignments = !flag_var_tracking_assignments; |
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1495 |
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1496 if (flag_var_tracking_assignments && !flag_var_tracking) |
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1497 flag_var_tracking = flag_var_tracking_assignments = -1; |
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1498 |
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1499 if (flag_var_tracking_assignments |
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1500 && (flag_selective_scheduling || flag_selective_scheduling2)) |
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1501 warning (0, "var-tracking-assignments changes selective scheduling"); |
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1502 |
| 0 | 1503 if (flag_tree_cselim == AUTODETECT_VALUE) |
| 1504 #ifdef HAVE_conditional_move | |
| 1505 flag_tree_cselim = 1; | |
| 1506 #else | |
| 1507 flag_tree_cselim = 0; | |
| 1508 #endif | |
| 1509 | |
| 1510 /* If auxiliary info generation is desired, open the output file. | |
| 1511 This goes in the same directory as the source file--unlike | |
| 1512 all the other output files. */ | |
| 1513 if (flag_gen_aux_info) | |
| 1514 { | |
| 1515 aux_info_file = fopen (aux_info_file_name, "w"); | |
| 1516 if (aux_info_file == 0) | |
| 1517 fatal_error ("can%'t open %s: %m", aux_info_file_name); | |
| 1518 } | |
| 1519 | |
| 1520 if (! targetm.have_named_sections) | |
| 1521 { | |
| 1522 if (flag_function_sections) | |
| 1523 { | |
| 1524 warning (0, "-ffunction-sections not supported for this target"); | |
| 1525 flag_function_sections = 0; | |
| 1526 } | |
| 1527 if (flag_data_sections) | |
| 1528 { | |
| 1529 warning (0, "-fdata-sections not supported for this target"); | |
| 1530 flag_data_sections = 0; | |
| 1531 } | |
| 1532 } | |
| 1533 | |
| 1534 if (flag_function_sections && profile_flag) | |
| 1535 { | |
| 1536 warning (0, "-ffunction-sections disabled; it makes profiling impossible"); | |
| 1537 flag_function_sections = 0; | |
| 1538 } | |
| 1539 | |
| 1540 #ifndef HAVE_prefetch | |
|
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1541 if (flag_prefetch_loop_arrays > 0) |
| 0 | 1542 { |
| 1543 warning (0, "-fprefetch-loop-arrays not supported for this target"); | |
| 1544 flag_prefetch_loop_arrays = 0; | |
| 1545 } | |
| 1546 #else | |
|
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1547 if (flag_prefetch_loop_arrays > 0 && !HAVE_prefetch) |
| 0 | 1548 { |
| 1549 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)"); | |
| 1550 flag_prefetch_loop_arrays = 0; | |
| 1551 } | |
| 1552 #endif | |
| 1553 | |
| 1554 /* This combination of options isn't handled for i386 targets and doesn't | |
| 1555 make much sense anyway, so don't allow it. */ | |
|
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1556 if (flag_prefetch_loop_arrays > 0 && optimize_size) |
| 0 | 1557 { |
| 1558 warning (0, "-fprefetch-loop-arrays is not supported with -Os"); | |
| 1559 flag_prefetch_loop_arrays = 0; | |
| 1560 } | |
| 1561 | |
| 1562 /* The presence of IEEE signaling NaNs, implies all math can trap. */ | |
| 1563 if (flag_signaling_nans) | |
| 1564 flag_trapping_math = 1; | |
| 1565 | |
|
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1566 /* We cannot reassociate if we want traps or signed zeros. */ |
| 0 | 1567 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros)) |
| 1568 { | |
| 1569 warning (0, "-fassociative-math disabled; other options take precedence"); | |
| 1570 flag_associative_math = 0; | |
| 1571 } | |
| 1572 | |
| 1573 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */ | |
| 1574 if (flag_cx_limited_range) | |
| 1575 flag_complex_method = 0; | |
| 1576 | |
| 1577 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */ | |
| 1578 if (flag_cx_fortran_rules) | |
| 1579 flag_complex_method = 1; | |
| 1580 | |
| 1581 /* Targets must be able to place spill slots at lower addresses. If the | |
| 1582 target already uses a soft frame pointer, the transition is trivial. */ | |
| 1583 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect) | |
| 1584 { | |
| 1585 warning (0, "-fstack-protector not supported for this target"); | |
| 1586 flag_stack_protect = 0; | |
| 1587 } | |
| 1588 if (!flag_stack_protect) | |
| 1589 warn_stack_protect = 0; | |
| 1590 | |
| 1591 /* ??? Unwind info is not correct around the CFG unless either a frame | |
| 1592 pointer is present or A_O_A is set. Fixing this requires rewriting | |
| 1593 unwind info generation to be aware of the CFG and propagating states | |
| 1594 around edges. */ | |
| 1595 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS | |
| 1596 && flag_omit_frame_pointer) | |
| 1597 { | |
| 1598 warning (0, "unwind tables currently require a frame pointer " | |
| 1599 "for correctness"); | |
| 1600 flag_omit_frame_pointer = 0; | |
| 1601 } | |
|
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1602 |
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1603 /* Save the current optimization options. */ |
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1604 optimization_default_node = build_optimization_node (); |
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1605 optimization_current_node = optimization_default_node; |
| 0 | 1606 } |
| 1607 | |
| 1608 /* This function can be called multiple times to reinitialize the compiler | |
| 1609 back end when register classes or instruction sets have changed, | |
| 1610 before each function. */ | |
| 1611 static void | |
| 1612 backend_init_target (void) | |
| 1613 { | |
| 1614 /* Initialize alignment variables. */ | |
| 1615 init_alignments (); | |
| 1616 | |
| 1617 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target() | |
| 1618 to initialize reg_raw_mode[]. */ | |
| 1619 init_emit_regs (); | |
| 1620 | |
| 1621 /* This invokes target hooks to set fixed_reg[] etc, which is | |
| 1622 mode-dependent. */ | |
| 1623 init_regs (); | |
| 1624 | |
| 1625 /* This depends on stack_pointer_rtx. */ | |
| 1626 init_fake_stack_mems (); | |
| 1627 | |
| 1628 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is | |
| 1629 mode-dependent. */ | |
| 1630 init_alias_target (); | |
| 1631 | |
| 1632 /* Depends on HARD_FRAME_POINTER_REGNUM. */ | |
| 1633 init_reload (); | |
| 1634 | |
| 1635 /* The following initialization functions need to generate rtl, so | |
| 1636 provide a dummy function context for them. */ | |
| 1637 init_dummy_function_start (); | |
| 1638 | |
| 1639 /* rtx_cost is mode-dependent, so cached values need to be recomputed | |
| 1640 on a mode change. */ | |
| 1641 init_expmed (); | |
| 1642 | |
| 1643 /* We may need to recompute regno_save_code[] and regno_restore_code[] | |
| 1644 after a mode change as well. */ | |
|
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1645 caller_save_initialized_p = false; |
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1646 |
| 0 | 1647 expand_dummy_function_end (); |
| 1648 } | |
| 1649 | |
| 1650 /* Initialize the compiler back end. This function is called only once, | |
| 1651 when starting the compiler. */ | |
| 1652 static void | |
| 1653 backend_init (void) | |
| 1654 { | |
|
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1655 init_emit_once (); |
| 0 | 1656 |
| 1657 init_rtlanal (); | |
| 1658 init_inline_once (); | |
| 1659 init_varasm_once (); | |
| 1660 save_register_info (); | |
| 1661 | |
| 1662 /* Initialize the target-specific back end pieces. */ | |
| 1663 ira_init_once (); | |
| 1664 backend_init_target (); | |
| 1665 } | |
| 1666 | |
|
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1667 /* Initialize excess precision settings. */ |
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1668 static void |
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1669 init_excess_precision (void) |
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1670 { |
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1671 /* Adjust excess precision handling based on the target options. If |
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1672 the front end cannot handle it, flag_excess_precision_cmdline |
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1673 will already have been set accordingly in the post_options |
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1674 hook. */ |
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|
1675 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT); |
|
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1676 flag_excess_precision = flag_excess_precision_cmdline; |
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1677 if (flag_unsafe_math_optimizations) |
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1678 flag_excess_precision = EXCESS_PRECISION_FAST; |
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1679 if (flag_excess_precision == EXCESS_PRECISION_STANDARD) |
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|
1680 { |
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1681 int flt_eval_method = TARGET_FLT_EVAL_METHOD; |
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|
1682 switch (flt_eval_method) |
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1683 { |
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1684 case -1: |
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1685 case 0: |
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1686 /* Either the target acts unpredictably (-1) or has all the |
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1687 operations required not to have excess precision (0). */ |
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1688 flag_excess_precision = EXCESS_PRECISION_FAST; |
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1689 break; |
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1690 case 1: |
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1691 case 2: |
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1692 /* In these cases, predictable excess precision makes |
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1693 sense. */ |
|
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1694 break; |
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1695 default: |
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1696 /* Any other implementation-defined FLT_EVAL_METHOD values |
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1697 require the compiler to handle the associated excess |
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1698 precision rules in excess_precision_type. */ |
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1699 gcc_unreachable (); |
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1700 } |
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1701 } |
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1702 } |
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1703 |
| 0 | 1704 /* Initialize things that are both lang-dependent and target-dependent. |
| 1705 This function can be called more than once if target parameters change. */ | |
| 1706 static void | |
| 1707 lang_dependent_init_target (void) | |
| 1708 { | |
|
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1709 /* This determines excess precision settings. */ |
|
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1710 init_excess_precision (); |
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1711 |
| 0 | 1712 /* This creates various _DECL nodes, so needs to be called after the |
| 1713 front end is initialized. It also depends on the HAVE_xxx macros | |
| 1714 generated from the target machine description. */ | |
| 1715 init_optabs (); | |
| 1716 | |
| 1717 /* The following initialization functions need to generate rtl, so | |
| 1718 provide a dummy function context for them. */ | |
| 1719 init_dummy_function_start (); | |
| 1720 | |
| 1721 /* Do the target-specific parts of expr initialization. */ | |
| 1722 init_expr_target (); | |
| 1723 | |
| 1724 /* Although the actions of these functions are language-independent, | |
| 1725 they use optabs, so we cannot call them from backend_init. */ | |
| 1726 init_set_costs (); | |
| 1727 ira_init (); | |
| 1728 | |
| 1729 expand_dummy_function_end (); | |
| 1730 } | |
| 1731 | |
| 1732 /* Language-dependent initialization. Returns nonzero on success. */ | |
| 1733 static int | |
| 1734 lang_dependent_init (const char *name) | |
| 1735 { | |
| 1736 location_t save_loc = input_location; | |
| 1737 if (dump_base_name == 0) | |
| 1738 dump_base_name = name && name[0] ? name : "gccdump"; | |
| 1739 | |
| 1740 /* Other front-end initialization. */ | |
| 1741 input_location = BUILTINS_LOCATION; | |
| 1742 if (lang_hooks.init () == 0) | |
| 1743 return 0; | |
| 1744 input_location = save_loc; | |
| 1745 | |
| 1746 init_asm_output (name); | |
| 1747 | |
|
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1748 /* If stack usage information is desired, open the output file. */ |
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1749 if (flag_stack_usage) |
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1750 stack_usage_file = open_auxiliary_file ("su"); |
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1751 |
| 0 | 1752 /* This creates various _DECL nodes, so needs to be called after the |
| 1753 front end is initialized. */ | |
| 1754 init_eh (); | |
| 1755 | |
| 1756 /* Do the target-specific parts of the initialization. */ | |
| 1757 lang_dependent_init_target (); | |
| 1758 | |
| 1759 /* If dbx symbol table desired, initialize writing it and output the | |
| 1760 predefined types. */ | |
| 1761 timevar_push (TV_SYMOUT); | |
| 1762 | |
| 1763 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO | |
| 1764 if (dwarf2out_do_frame ()) | |
| 1765 dwarf2out_frame_init (); | |
| 1766 #endif | |
| 1767 | |
| 1768 /* Now we have the correct original filename, we can initialize | |
| 1769 debug output. */ | |
| 1770 (*debug_hooks->init) (name); | |
| 1771 | |
| 1772 timevar_pop (TV_SYMOUT); | |
| 1773 | |
| 1774 return 1; | |
| 1775 } | |
| 1776 | |
| 1777 | |
| 1778 /* Reinitialize everything when target parameters, such as register usage, | |
| 1779 have changed. */ | |
| 1780 void | |
| 1781 target_reinit (void) | |
| 1782 { | |
|
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1783 struct rtl_data saved_x_rtl; |
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1784 rtx *saved_regno_reg_rtx; |
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1785 |
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1786 /* Save *crtl and regno_reg_rtx around the reinitialization |
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1787 to allow target_reinit being called even after prepare_function_start. */ |
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1788 saved_regno_reg_rtx = regno_reg_rtx; |
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1789 if (saved_regno_reg_rtx) |
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1790 { |
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1791 saved_x_rtl = *crtl; |
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1792 memset (crtl, '\0', sizeof (*crtl)); |
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1793 regno_reg_rtx = NULL; |
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1794 } |
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1795 |
| 0 | 1796 /* Reinitialize RTL backend. */ |
| 1797 backend_init_target (); | |
| 1798 | |
| 1799 /* Reinitialize lang-dependent parts. */ | |
| 1800 lang_dependent_init_target (); | |
|
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1801 |
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1802 /* And restore it at the end, as free_after_compilation from |
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1803 expand_dummy_function_end clears it. */ |
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1804 if (saved_regno_reg_rtx) |
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1805 { |
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1806 *crtl = saved_x_rtl; |
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1807 regno_reg_rtx = saved_regno_reg_rtx; |
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1808 saved_regno_reg_rtx = NULL; |
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1809 } |
| 0 | 1810 } |
| 1811 | |
| 1812 void | |
| 1813 dump_memory_report (bool final) | |
| 1814 { | |
| 1815 ggc_print_statistics (); | |
| 1816 stringpool_statistics (); | |
| 1817 dump_tree_statistics (); | |
| 1818 dump_gimple_statistics (); | |
| 1819 dump_rtx_statistics (); | |
| 1820 dump_alloc_pool_statistics (); | |
| 1821 dump_bitmap_statistics (); | |
| 1822 dump_vec_loc_statistics (); | |
| 1823 dump_ggc_loc_statistics (final); | |
|
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1824 dump_alias_stats (stderr); |
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1825 dump_pta_stats (stderr); |
| 0 | 1826 } |
| 1827 | |
| 1828 /* Clean up: close opened files, etc. */ | |
| 1829 | |
| 1830 static void | |
|
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1831 finalize (bool no_backend) |
| 0 | 1832 { |
| 1833 /* Close the dump files. */ | |
| 1834 if (flag_gen_aux_info) | |
| 1835 { | |
| 1836 fclose (aux_info_file); | |
|
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1837 if (seen_error ()) |
| 0 | 1838 unlink (aux_info_file_name); |
| 1839 } | |
| 1840 | |
| 1841 /* Close non-debugging input and output files. Take special care to note | |
| 1842 whether fclose returns an error, since the pages might still be on the | |
| 1843 buffer chain while the file is open. */ | |
| 1844 | |
| 1845 if (asm_out_file) | |
| 1846 { | |
| 1847 if (ferror (asm_out_file) != 0) | |
| 1848 fatal_error ("error writing to %s: %m", asm_file_name); | |
| 1849 if (fclose (asm_out_file) != 0) | |
| 1850 fatal_error ("error closing %s: %m", asm_file_name); | |
|
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1851 if (flag_wpa) |
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1852 unlink_if_ordinary (asm_file_name); |
| 0 | 1853 } |
| 1854 | |
|
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1855 if (stack_usage_file) |
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1856 fclose (stack_usage_file); |
| 0 | 1857 |
|
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1858 if (!no_backend) |
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1859 { |
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1860 statistics_fini (); |
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1861 |
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1862 finish_optimization_passes (); |
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1863 |
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1864 ira_finish_once (); |
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1865 } |
| 0 | 1866 |
| 1867 if (mem_report) | |
| 1868 dump_memory_report (true); | |
| 1869 | |
| 1870 /* Language-specific end of compilation actions. */ | |
| 1871 lang_hooks.finish (); | |
| 1872 } | |
| 1873 | |
| 1874 /* Initialize the compiler, and compile the input file. */ | |
| 1875 static void | |
| 1876 do_compile (void) | |
| 1877 { | |
| 1878 /* Initialize timing first. The C front ends read the main file in | |
| 1879 the post_options hook, and C++ does file timings. */ | |
| 1880 if (time_report || !quiet_flag || flag_detailed_statistics) | |
| 1881 timevar_init (); | |
| 1882 timevar_start (TV_TOTAL); | |
| 1883 | |
| 1884 process_options (); | |
| 1885 | |
| 1886 /* Don't do any more if an error has already occurred. */ | |
|
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1887 if (!seen_error ()) |
| 0 | 1888 { |
| 1889 /* This must be run always, because it is needed to compute the FP | |
| 1890 predefined macros, such as __LDBL_MAX__, for targets using non | |
| 1891 default FP formats. */ | |
| 1892 init_adjust_machine_modes (); | |
| 1893 | |
| 1894 /* Set up the back-end if requested. */ | |
| 1895 if (!no_backend) | |
| 1896 backend_init (); | |
| 1897 | |
| 1898 /* Language-dependent initialization. Returns true on success. */ | |
| 1899 if (lang_dependent_init (main_input_filename)) | |
| 1900 compile_file (); | |
| 1901 | |
|
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1902 finalize (no_backend); |
| 0 | 1903 } |
| 1904 | |
| 1905 /* Stop timing and print the times. */ | |
| 1906 timevar_stop (TV_TOTAL); | |
| 1907 timevar_print (stderr); | |
| 1908 } | |
| 1909 | |
| 1910 /* Entry point of cc1, cc1plus, jc1, f771, etc. | |
| 1911 Exit code is FATAL_EXIT_CODE if can't open files or if there were | |
| 1912 any errors, or SUCCESS_EXIT_CODE if compilation succeeded. | |
| 1913 | |
| 1914 It is not safe to call this function more than once. */ | |
| 1915 | |
| 1916 int | |
|
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1917 toplev_main (int argc, char **argv) |
| 0 | 1918 { |
|
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1919 expandargv (&argc, &argv); |
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1920 |
| 0 | 1921 /* Initialization of GCC's environment, and diagnostics. */ |
| 1922 general_init (argv[0]); | |
| 1923 | |
|
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1924 /* One-off initialization of options that does not need to be |
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1925 repeated when options are added for particular functions. */ |
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1926 init_options_once (); |
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1927 |
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1928 /* Initialize global options structures; this must be repeated for |
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1929 each structure used for parsing options. */ |
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1930 init_options_struct (&global_options, &global_options_set); |
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1931 lang_hooks.init_options_struct (&global_options); |
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1932 |
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1933 /* Convert the options to an array. */ |
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1934 decode_cmdline_options_to_array_default_mask (argc, |
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1935 CONST_CAST2 (const char **, |
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1936 char **, argv), |
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1937 &save_decoded_options, |
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1938 &save_decoded_options_count); |
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1939 |
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1940 /* Perform language-specific options initialization. */ |
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1941 lang_hooks.init_options (save_decoded_options_count, save_decoded_options); |
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1942 |
| 0 | 1943 /* Parse the options and do minimal processing; basically just |
| 1944 enough to default flags appropriately. */ | |
|
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1945 decode_options (&global_options, &global_options_set, |
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1946 save_decoded_options, save_decoded_options_count, |
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1947 UNKNOWN_LOCATION, global_dc); |
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1948 |
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1949 handle_common_deferred_options (); |
| 0 | 1950 |
| 1951 init_local_tick (); | |
| 1952 | |
|
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1953 initialize_plugins (); |
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1954 |
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1955 if (version_flag) |
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1956 print_version (stderr, ""); |
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1957 |
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1958 if (help_flag) |
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1959 print_plugins_help (stderr, ""); |
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1960 |
| 0 | 1961 /* Exit early if we can (e.g. -help). */ |
| 1962 if (!exit_after_options) | |
| 1963 do_compile (); | |
| 1964 | |
|
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1965 if (warningcount || errorcount) |
| 0 | 1966 print_ignored_options (); |
|
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1967 diagnostic_finish (global_dc); |
| 0 | 1968 |
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1969 /* Invoke registered plugin callbacks if any. */ |
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1970 invoke_plugin_callbacks (PLUGIN_FINISH, NULL); |
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1971 |
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1972 finalize_plugins (); |
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1973 if (seen_error ()) |
| 0 | 1974 return (FATAL_EXIT_CODE); |
| 1975 | |
| 1976 return (SUCCESS_EXIT_CODE); | |
| 1977 } |