1 /* Top level of GCC compilers (cc1, cc1plus, etc.) 2 Copyright (C) 1987-2018 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 /* This is the top level of cc1/c++. 21 It parses command args, opens files, invokes the various passes 22 in the proper order, and counts the time used by each. 23 Error messages and low-level interface to malloc also handled here. */ 24 25 #include "config.h" 26 #include "system.h" 27 #include "coretypes.h" 28 #include "backend.h" 29 #include "target.h" 30 #include "rtl.h" 31 #include "tree.h" 32 #include "gimple.h" 33 #include "alloc-pool.h" 34 #include "timevar.h" 35 #include "memmodel.h" 36 #include "tm_p.h" 37 #include "optabs-libfuncs.h" 38 #include "insn-config.h" 39 #include "ira.h" 40 #include "recog.h" 41 #include "cgraph.h" 42 #include "coverage.h" 43 #include "diagnostic.h" 44 #include "varasm.h" 45 #include "tree-inline.h" 46 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */ 47 #include "version.h" 48 #include "flags.h" 49 #include "insn-attr.h" 50 #include "output.h" 51 #include "toplev.h" 52 #include "expr.h" 53 #include "intl.h" 54 #include "tree-diagnostic.h" 55 #include "params.h" 56 #include "reload.h" 57 #include "lra.h" 58 #include "dwarf2asm.h" 59 #include "debug.h" 60 #include "common/common-target.h" 61 #include "langhooks.h" 62 #include "cfgloop.h" /* for init_set_costs */ 63 #include "hosthooks.h" 64 #include "opts.h" 65 #include "opts-diagnostic.h" 66 #include "stringpool.h" 67 #include "attribs.h" 68 #include "asan.h" 69 #include "tsan.h" 70 #include "plugin.h" 71 #include "context.h" 72 #include "pass_manager.h" 73 #include "auto-profile.h" 74 #include "dwarf2out.h" 75 #include "ipa-reference.h" 76 #include "symbol-summary.h" 77 #include "tree-vrp.h" 78 #include "ipa-prop.h" 79 #include "gcse.h" 80 #include "tree-chkp.h" 81 #include "omp-offload.h" 82 #include "hsa-common.h" 83 #include "edit-context.h" 84 #include "tree-pass.h" 85 #include "dumpfile.h" 86 #include "ipa-fnsummary.h" 87 88 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) 89 #include "dbxout.h" 90 #endif 91 92 #ifdef XCOFF_DEBUGGING_INFO 93 #include "xcoffout.h" /* Needed for external data declarations. */ 94 #endif 95 96 #include "selftest.h" 97 98 #ifdef HAVE_isl 99 #include <isl/version.h> 100 #endif 101 102 static void general_init (const char *, bool); 103 static void do_compile (); 104 static void process_options (void); 105 static void backend_init (void); 106 static int lang_dependent_init (const char *); 107 static void init_asm_output (const char *); 108 static void finalize (bool); 109 110 static void crash_signal (int) ATTRIBUTE_NORETURN; 111 static void compile_file (void); 112 113 /* True if we don't need a backend (e.g. preprocessing only). */ 114 static bool no_backend; 115 116 /* Length of line when printing switch values. */ 117 #define MAX_LINE 75 118 119 /* Decoded options, and number of such options. */ 120 struct cl_decoded_option *save_decoded_options; 121 unsigned int save_decoded_options_count; 122 123 /* Used to enable -fvar-tracking, -fweb and -frename-registers according 124 to optimize in process_options (). */ 125 #define AUTODETECT_VALUE 2 126 127 /* Debug hooks - dependent upon command line options. */ 128 129 const struct gcc_debug_hooks *debug_hooks; 130 131 /* The FUNCTION_DECL for the function currently being compiled, 132 or 0 if between functions. */ 133 tree current_function_decl; 134 135 /* Set to the FUNC_BEGIN label of the current function, or NULL 136 if none. */ 137 const char * current_function_func_begin_label; 138 139 /* A random sequence of characters, unless overridden by user. */ 140 static const char *flag_random_seed; 141 142 /* A local time stamp derived from the time of compilation. It will be 143 zero if the system cannot provide a time. It will be -1u, if the 144 user has specified a particular random seed. */ 145 unsigned local_tick; 146 147 /* Random number for this compilation */ 148 HOST_WIDE_INT random_seed; 149 150 /* -f flags. */ 151 152 /* When non-NULL, indicates that whenever space is allocated on the 153 stack, the resulting stack pointer must not pass this 154 address---that is, for stacks that grow downward, the stack pointer 155 must always be greater than or equal to this address; for stacks 156 that grow upward, the stack pointer must be less than this address. 157 At present, the rtx may be either a REG or a SYMBOL_REF, although 158 the support provided depends on the backend. */ 159 rtx stack_limit_rtx; 160 161 struct target_flag_state default_target_flag_state; 162 #if SWITCHABLE_TARGET 163 struct target_flag_state *this_target_flag_state = &default_target_flag_state; 164 #else 165 #define this_target_flag_state (&default_target_flag_state) 166 #endif 167 168 /* The user symbol prefix after having resolved same. */ 169 const char *user_label_prefix; 170 171 /* Output files for assembler code (real compiler output) 172 and debugging dumps. */ 173 174 FILE *asm_out_file; 175 FILE *aux_info_file; 176 FILE *stack_usage_file = NULL; 177 178 /* The current working directory of a translation. It's generally the 179 directory from which compilation was initiated, but a preprocessed 180 file may specify the original directory in which it was 181 created. */ 182 183 static const char *src_pwd; 184 185 /* Initialize src_pwd with the given string, and return true. If it 186 was already initialized, return false. As a special case, it may 187 be called with a NULL argument to test whether src_pwd has NOT been 188 initialized yet. */ 189 190 bool 191 set_src_pwd (const char *pwd) 192 { 193 if (src_pwd) 194 { 195 if (strcmp (src_pwd, pwd) == 0) 196 return true; 197 else 198 return false; 199 } 200 201 src_pwd = xstrdup (pwd); 202 return true; 203 } 204 205 /* Return the directory from which the translation unit was initiated, 206 in case set_src_pwd() was not called before to assign it a 207 different value. */ 208 209 const char * 210 get_src_pwd (void) 211 { 212 if (! src_pwd) 213 { 214 src_pwd = getpwd (); 215 if (!src_pwd) 216 src_pwd = "."; 217 } 218 219 return src_pwd; 220 } 221 222 /* Called when the start of a function definition is parsed, 223 this function prints on stderr the name of the function. */ 224 void 225 announce_function (tree decl) 226 { 227 if (!quiet_flag) 228 { 229 if (rtl_dump_and_exit) 230 fprintf (stderr, "%s ", 231 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl)))); 232 else 233 fprintf (stderr, " %s", 234 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2))); 235 fflush (stderr); 236 pp_needs_newline (global_dc->printer) = true; 237 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL); 238 } 239 } 240 241 /* Initialize local_tick with the time of day, or -1 if 242 flag_random_seed is set. */ 243 244 static void 245 init_local_tick (void) 246 { 247 if (!flag_random_seed) 248 { 249 #ifdef HAVE_GETTIMEOFDAY 250 { 251 struct timeval tv; 252 253 gettimeofday (&tv, NULL); 254 local_tick = (unsigned) tv.tv_sec * 1000 + tv.tv_usec / 1000; 255 } 256 #else 257 { 258 time_t now = time (NULL); 259 260 if (now != (time_t)-1) 261 local_tick = (unsigned) now; 262 } 263 #endif 264 } 265 else 266 local_tick = -1; 267 } 268 269 /* Obtain the random_seed. Unless NOINIT, initialize it if 270 it's not provided in the command line. */ 271 272 HOST_WIDE_INT 273 get_random_seed (bool noinit) 274 { 275 if (!random_seed && !noinit) 276 { 277 int fd = open ("/dev/urandom", O_RDONLY); 278 if (fd >= 0) 279 { 280 if (read (fd, &random_seed, sizeof (random_seed)) 281 != sizeof (random_seed)) 282 random_seed = 0; 283 close (fd); 284 } 285 if (!random_seed) 286 random_seed = local_tick ^ getpid (); 287 } 288 return random_seed; 289 } 290 291 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */ 292 293 void 294 set_random_seed (const char *val) 295 { 296 flag_random_seed = val; 297 if (flag_random_seed) 298 { 299 char *endp; 300 301 /* When the driver passed in a hex number don't crc it again */ 302 random_seed = strtoul (flag_random_seed, &endp, 0); 303 if (!(endp > flag_random_seed && *endp == 0)) 304 random_seed = crc32_string (0, flag_random_seed); 305 } 306 } 307 308 /* Handler for fatal signals, such as SIGSEGV. These are transformed 309 into ICE messages, which is much more user friendly. In case the 310 error printer crashes, reset the signal to prevent infinite recursion. */ 311 312 static void 313 crash_signal (int signo) 314 { 315 signal (signo, SIG_DFL); 316 317 /* If we crashed while processing an ASM statement, then be a little more 318 graceful. It's most likely the user's fault. */ 319 if (this_is_asm_operands) 320 { 321 output_operand_lossage ("unrecoverable error"); 322 exit (FATAL_EXIT_CODE); 323 } 324 325 internal_error ("%s", strsignal (signo)); 326 } 327 328 /* A subroutine of wrapup_global_declarations. We've come to the end of 329 the compilation unit. All deferred variables should be undeferred, 330 and all incomplete decls should be finalized. */ 331 332 void 333 wrapup_global_declaration_1 (tree decl) 334 { 335 /* We're not deferring this any longer. Assignment is conditional to 336 avoid needlessly dirtying PCH pages. */ 337 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS) 338 && DECL_DEFER_OUTPUT (decl) != 0) 339 DECL_DEFER_OUTPUT (decl) = 0; 340 341 if (VAR_P (decl) && DECL_SIZE (decl) == 0) 342 lang_hooks.finish_incomplete_decl (decl); 343 } 344 345 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL 346 needs to be output. Return true if it is output. */ 347 348 bool 349 wrapup_global_declaration_2 (tree decl) 350 { 351 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl) 352 || (VAR_P (decl) && DECL_HAS_VALUE_EXPR_P (decl))) 353 return false; 354 355 /* Don't write out static consts, unless we still need them. 356 357 We also keep static consts if not optimizing (for debugging), 358 unless the user specified -fno-keep-static-consts. 359 ??? They might be better written into the debug information. 360 This is possible when using DWARF. 361 362 A language processor that wants static constants to be always 363 written out (even if it is not used) is responsible for 364 calling rest_of_decl_compilation itself. E.g. the C front-end 365 calls rest_of_decl_compilation from finish_decl. 366 One motivation for this is that is conventional in some 367 environments to write things like: 368 static const char rcsid[] = "... version string ..."; 369 intending to force the string to be in the executable. 370 371 A language processor that would prefer to have unneeded 372 static constants "optimized away" would just defer writing 373 them out until here. E.g. C++ does this, because static 374 constants are often defined in header files. 375 376 ??? A tempting alternative (for both C and C++) would be 377 to force a constant to be written if and only if it is 378 defined in a main file, as opposed to an include file. */ 379 380 if (VAR_P (decl) && TREE_STATIC (decl)) 381 { 382 varpool_node *node; 383 bool needed = true; 384 node = varpool_node::get (decl); 385 386 if (!node && flag_ltrans) 387 needed = false; 388 else if (node && node->definition) 389 needed = false; 390 else if (node && node->alias) 391 needed = false; 392 else if (!symtab->global_info_ready 393 && (TREE_USED (decl) 394 || TREE_USED (DECL_ASSEMBLER_NAME (decl)))) 395 /* needed */; 396 else if (node && node->analyzed) 397 /* needed */; 398 else if (DECL_COMDAT (decl)) 399 needed = false; 400 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl) 401 && (optimize || !flag_keep_static_consts 402 || DECL_ARTIFICIAL (decl))) 403 needed = false; 404 405 if (needed) 406 { 407 rest_of_decl_compilation (decl, 1, 1); 408 return true; 409 } 410 } 411 412 return false; 413 } 414 415 /* Do any final processing required for the declarations in VEC, of 416 which there are LEN. We write out inline functions and variables 417 that have been deferred until this point, but which are required. 418 Returns nonzero if anything was put out. */ 419 420 bool 421 wrapup_global_declarations (tree *vec, int len) 422 { 423 bool reconsider, output_something = false; 424 int i; 425 426 for (i = 0; i < len; i++) 427 wrapup_global_declaration_1 (vec[i]); 428 429 /* Now emit any global variables or functions that we have been 430 putting off. We need to loop in case one of the things emitted 431 here references another one which comes earlier in the list. */ 432 do 433 { 434 reconsider = false; 435 for (i = 0; i < len; i++) 436 reconsider |= wrapup_global_declaration_2 (vec[i]); 437 if (reconsider) 438 output_something = true; 439 } 440 while (reconsider); 441 442 return output_something; 443 } 444 445 /* Compile an entire translation unit. Write a file of assembly 446 output and various debugging dumps. */ 447 448 static void 449 compile_file (void) 450 { 451 timevar_start (TV_PHASE_PARSING); 452 timevar_push (TV_PARSE_GLOBAL); 453 454 /* Parse entire file and generate initial debug information. */ 455 lang_hooks.parse_file (); 456 457 timevar_pop (TV_PARSE_GLOBAL); 458 timevar_stop (TV_PHASE_PARSING); 459 460 if (flag_dump_locations) 461 dump_location_info (stderr); 462 463 /* Compilation is now finished except for writing 464 what's left of the symbol table output. */ 465 466 if (flag_syntax_only || flag_wpa) 467 return; 468 469 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack 470 and this shouldn't influence any types built by the middle-end 471 from now on (like gcov_info_type). */ 472 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT; 473 474 ggc_protect_identifiers = false; 475 476 /* Run the actual compilation process. */ 477 if (!in_lto_p) 478 { 479 timevar_start (TV_PHASE_OPT_GEN); 480 symtab->finalize_compilation_unit (); 481 timevar_stop (TV_PHASE_OPT_GEN); 482 } 483 484 /* Perform any post compilation-proper parser cleanups and 485 processing. This is currently only needed for the C++ parser, 486 which can be hopefully cleaned up so this hook is no longer 487 necessary. */ 488 if (lang_hooks.decls.post_compilation_parsing_cleanups) 489 lang_hooks.decls.post_compilation_parsing_cleanups (); 490 491 if (seen_error ()) 492 return; 493 494 timevar_start (TV_PHASE_LATE_ASM); 495 496 /* Compilation unit is finalized. When producing non-fat LTO object, we are 497 basically finished. */ 498 if (in_lto_p || !flag_lto || flag_fat_lto_objects) 499 { 500 /* File-scope initialization for AddressSanitizer. */ 501 if (flag_sanitize & SANITIZE_ADDRESS) 502 asan_finish_file (); 503 504 if (flag_sanitize & SANITIZE_THREAD) 505 tsan_finish_file (); 506 507 if (flag_check_pointer_bounds) 508 chkp_finish_file (); 509 510 omp_finish_file (); 511 512 hsa_output_brig (); 513 514 output_shared_constant_pool (); 515 output_object_blocks (); 516 finish_tm_clone_pairs (); 517 518 /* Write out any pending weak symbol declarations. */ 519 weak_finish (); 520 521 /* This must be at the end before unwind and debug info. 522 Some target ports emit PIC setup thunks here. */ 523 targetm.asm_out.code_end (); 524 525 /* Do dbx symbols. */ 526 timevar_push (TV_SYMOUT); 527 528 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO 529 dwarf2out_frame_finish (); 530 #endif 531 532 (*debug_hooks->finish) (main_input_filename); 533 timevar_pop (TV_SYMOUT); 534 535 /* Output some stuff at end of file if nec. */ 536 537 dw2_output_indirect_constants (); 538 539 /* Flush any pending external directives. */ 540 process_pending_assemble_externals (); 541 } 542 543 /* Emit LTO marker if LTO info has been previously emitted. This is 544 used by collect2 to determine whether an object file contains IL. 545 We used to emit an undefined reference here, but this produces 546 link errors if an object file with IL is stored into a shared 547 library without invoking lto1. */ 548 if (flag_generate_lto || flag_generate_offload) 549 { 550 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON 551 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE, 552 "__gnu_lto_v1", 553 HOST_WIDE_INT_1U, 8); 554 #elif defined ASM_OUTPUT_ALIGNED_COMMON 555 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1", 556 HOST_WIDE_INT_1U, 8); 557 #else 558 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1", 559 HOST_WIDE_INT_1U, 560 HOST_WIDE_INT_1U); 561 #endif 562 } 563 564 /* Let linker plugin know that this is a slim object and must be LTOed 565 even when user did not ask for it. */ 566 if (flag_generate_lto && !flag_fat_lto_objects) 567 { 568 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON 569 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE, "__gnu_lto_slim", 570 HOST_WIDE_INT_1U, 8); 571 #elif defined ASM_OUTPUT_ALIGNED_COMMON 572 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_slim", 573 HOST_WIDE_INT_1U, 8); 574 #else 575 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_slim", 576 HOST_WIDE_INT_1U, 577 HOST_WIDE_INT_1U); 578 #endif 579 } 580 581 /* Attach a special .ident directive to the end of the file to identify 582 the version of GCC which compiled this code. The format of the .ident 583 string is patterned after the ones produced by native SVR4 compilers. */ 584 if (!flag_no_ident) 585 { 586 const char *pkg_version = "(GNU) "; 587 char *ident_str; 588 589 if (strcmp ("(GCC) ", pkgversion_string)) 590 pkg_version = pkgversion_string; 591 592 ident_str = ACONCAT (("GCC: ", pkg_version, version_string, NULL)); 593 targetm.asm_out.output_ident (ident_str); 594 } 595 596 /* Auto profile finalization. */ 597 if (flag_auto_profile) 598 end_auto_profile (); 599 600 /* Invoke registered plugin callbacks. */ 601 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL); 602 603 /* This must be at the end. Some target ports emit end of file directives 604 into the assembly file here, and hence we can not output anything to the 605 assembly file after this point. */ 606 targetm.asm_out.file_end (); 607 608 timevar_stop (TV_PHASE_LATE_ASM); 609 } 610 611 /* Print version information to FILE. 612 Each line begins with INDENT (for the case where FILE is the 613 assembler output file). 614 615 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler 616 proper and can print pertinent state (e.g. params and plugins). 617 618 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the 619 compiler, and we don't hold the mutex on the compiler's global state: 620 we can't print params and plugins, since they might not be initialized, 621 or might be being manipulated by a compile running in another 622 thread. */ 623 624 void 625 print_version (FILE *file, const char *indent, bool show_global_state) 626 { 627 static const char fmt1[] = 628 #ifdef __GNUC__ 629 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ") 630 #else 631 N_("%s%s%s %sversion %s (%s) compiled by CC, ") 632 #endif 633 ; 634 static const char fmt2[] = 635 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n"); 636 static const char fmt3[] = 637 N_("%s%swarning: %s header version %s differs from library version %s.\n"); 638 static const char fmt4[] = 639 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n"); 640 #ifndef __VERSION__ 641 #define __VERSION__ "[?]" 642 #endif 643 fprintf (file, 644 file == stderr ? _(fmt1) : fmt1, 645 indent, *indent != 0 ? " " : "", 646 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME, 647 indent, __VERSION__); 648 649 /* We need to stringify the GMP macro values. Ugh, gmp_version has 650 two string formats, "i.j.k" and "i.j" when k is zero. As of 651 gmp-4.3.0, GMP always uses the 3 number format. */ 652 #define GCC_GMP_STRINGIFY_VERSION3(X) #X 653 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X) 654 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z)) 655 #define GCC_GMP_VERSION \ 656 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL) 657 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0 658 #define GCC_GMP_STRINGIFY_VERSION \ 659 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \ 660 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) 661 #else 662 #define GCC_GMP_STRINGIFY_VERSION \ 663 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \ 664 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \ 665 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL) 666 #endif 667 fprintf (file, 668 file == stderr ? _(fmt2) : fmt2, 669 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING, 670 #ifndef HAVE_isl 671 "none" 672 #else 673 isl_version () 674 #endif 675 ); 676 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version)) 677 fprintf (file, 678 file == stderr ? _(fmt3) : fmt3, 679 indent, *indent != 0 ? " " : "", 680 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version); 681 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ())) 682 fprintf (file, 683 file == stderr ? _(fmt3) : fmt3, 684 indent, *indent != 0 ? " " : "", 685 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ()); 686 if (strcmp (MPC_VERSION_STRING, mpc_get_version ())) 687 fprintf (file, 688 file == stderr ? _(fmt3) : fmt3, 689 indent, *indent != 0 ? " " : "", 690 "MPC", MPC_VERSION_STRING, mpc_get_version ()); 691 692 if (show_global_state) 693 { 694 fprintf (file, 695 file == stderr ? _(fmt4) : fmt4, 696 indent, *indent != 0 ? " " : "", 697 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE)); 698 699 print_plugins_versions (file, indent); 700 } 701 } 702 703 static int 704 print_to_asm_out_file (print_switch_type type, const char * text) 705 { 706 bool prepend_sep = true; 707 708 switch (type) 709 { 710 case SWITCH_TYPE_LINE_END: 711 putc ('\n', asm_out_file); 712 return 1; 713 714 case SWITCH_TYPE_LINE_START: 715 fputs (ASM_COMMENT_START, asm_out_file); 716 return strlen (ASM_COMMENT_START); 717 718 case SWITCH_TYPE_DESCRIPTIVE: 719 if (ASM_COMMENT_START[0] == 0) 720 prepend_sep = false; 721 /* FALLTHRU */ 722 case SWITCH_TYPE_PASSED: 723 case SWITCH_TYPE_ENABLED: 724 if (prepend_sep) 725 fputc (' ', asm_out_file); 726 fputs (text, asm_out_file); 727 /* No need to return the length here as 728 print_single_switch has already done it. */ 729 return 0; 730 731 default: 732 return -1; 733 } 734 } 735 736 static int 737 print_to_stderr (print_switch_type type, const char * text) 738 { 739 switch (type) 740 { 741 case SWITCH_TYPE_LINE_END: 742 putc ('\n', stderr); 743 return 1; 744 745 case SWITCH_TYPE_LINE_START: 746 return 0; 747 748 case SWITCH_TYPE_PASSED: 749 case SWITCH_TYPE_ENABLED: 750 fputc (' ', stderr); 751 /* FALLTHRU */ 752 753 case SWITCH_TYPE_DESCRIPTIVE: 754 fputs (text, stderr); 755 /* No need to return the length here as 756 print_single_switch has already done it. */ 757 return 0; 758 759 default: 760 return -1; 761 } 762 } 763 764 /* Print an option value and return the adjusted position in the line. 765 ??? print_fn doesn't handle errors, eg disk full; presumably other 766 code will catch a disk full though. */ 767 768 static int 769 print_single_switch (print_switch_fn_type print_fn, 770 int pos, 771 print_switch_type type, 772 const char * text) 773 { 774 /* The ultrix fprintf returns 0 on success, so compute the result 775 we want here since we need it for the following test. The +1 776 is for the separator character that will probably be emitted. */ 777 int len = strlen (text) + 1; 778 779 if (pos != 0 780 && pos + len > MAX_LINE) 781 { 782 print_fn (SWITCH_TYPE_LINE_END, NULL); 783 pos = 0; 784 } 785 786 if (pos == 0) 787 pos += print_fn (SWITCH_TYPE_LINE_START, NULL); 788 789 print_fn (type, text); 790 return pos + len; 791 } 792 793 /* Print active target switches using PRINT_FN. 794 POS is the current cursor position and MAX is the size of a "line". 795 Each line begins with INDENT and ends with TERM. 796 Each switch is separated from the next by SEP. */ 797 798 static void 799 print_switch_values (print_switch_fn_type print_fn) 800 { 801 int pos = 0; 802 size_t j; 803 804 /* Print the options as passed. */ 805 pos = print_single_switch (print_fn, pos, 806 SWITCH_TYPE_DESCRIPTIVE, _("options passed: ")); 807 808 for (j = 1; j < save_decoded_options_count; j++) 809 { 810 switch (save_decoded_options[j].opt_index) 811 { 812 case OPT_o: 813 case OPT_d: 814 case OPT_dumpbase: 815 case OPT_dumpdir: 816 case OPT_auxbase: 817 case OPT_quiet: 818 case OPT_version: 819 /* Ignore these. */ 820 continue; 821 } 822 823 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, 824 save_decoded_options[j].orig_option_with_args_text); 825 } 826 827 if (pos > 0) 828 print_fn (SWITCH_TYPE_LINE_END, NULL); 829 830 /* Print the -f and -m options that have been enabled. 831 We don't handle language specific options but printing argv 832 should suffice. */ 833 pos = print_single_switch (print_fn, 0, 834 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: ")); 835 836 for (j = 0; j < cl_options_count; j++) 837 if (cl_options[j].cl_report 838 && option_enabled (j, &global_options) > 0) 839 pos = print_single_switch (print_fn, pos, 840 SWITCH_TYPE_ENABLED, cl_options[j].opt_text); 841 842 print_fn (SWITCH_TYPE_LINE_END, NULL); 843 } 844 845 /* Open assembly code output file. Do this even if -fsyntax-only is 846 on, because then the driver will have provided the name of a 847 temporary file or bit bucket for us. NAME is the file specified on 848 the command line, possibly NULL. */ 849 static void 850 init_asm_output (const char *name) 851 { 852 if (name == NULL && asm_file_name == 0) 853 asm_out_file = stdout; 854 else 855 { 856 if (asm_file_name == 0) 857 { 858 int len = strlen (dump_base_name); 859 char *dumpname = XNEWVEC (char, len + 6); 860 861 memcpy (dumpname, dump_base_name, len + 1); 862 strip_off_ending (dumpname, len); 863 strcat (dumpname, ".s"); 864 asm_file_name = dumpname; 865 } 866 if (!strcmp (asm_file_name, "-")) 867 asm_out_file = stdout; 868 else if (!canonical_filename_eq (asm_file_name, name) 869 || !strcmp (asm_file_name, HOST_BIT_BUCKET)) 870 asm_out_file = fopen (asm_file_name, "w"); 871 else 872 /* Use UNKOWN_LOCATION to prevent gcc from printing the first 873 line in the current file. */ 874 fatal_error (UNKNOWN_LOCATION, 875 "input file %qs is the same as output file", 876 asm_file_name); 877 if (asm_out_file == 0) 878 fatal_error (UNKNOWN_LOCATION, 879 "can%'t open %qs for writing: %m", asm_file_name); 880 } 881 882 if (!flag_syntax_only) 883 { 884 targetm.asm_out.file_start (); 885 886 if (flag_record_gcc_switches) 887 { 888 if (targetm.asm_out.record_gcc_switches) 889 { 890 /* Let the target know that we are about to start recording. */ 891 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE, 892 NULL); 893 /* Now record the switches. */ 894 print_switch_values (targetm.asm_out.record_gcc_switches); 895 /* Let the target know that the recording is over. */ 896 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE, 897 NULL); 898 } 899 else 900 inform (UNKNOWN_LOCATION, 901 "-frecord-gcc-switches is not supported by " 902 "the current target"); 903 } 904 905 if (flag_verbose_asm) 906 { 907 /* Print the list of switches in effect 908 into the assembler file as comments. */ 909 print_version (asm_out_file, ASM_COMMENT_START, true); 910 print_switch_values (print_to_asm_out_file); 911 putc ('\n', asm_out_file); 912 } 913 } 914 } 915 916 /* A helper function; used as the reallocator function for cpp's line 917 table. */ 918 static void * 919 realloc_for_line_map (void *ptr, size_t len) 920 { 921 return ggc_realloc (ptr, len); 922 } 923 924 /* A helper function: used as the allocator function for 925 identifier_to_locale. */ 926 static void * 927 alloc_for_identifier_to_locale (size_t len) 928 { 929 return ggc_alloc_atomic (len); 930 } 931 932 /* Output stack usage information. */ 933 void 934 output_stack_usage (void) 935 { 936 static bool warning_issued = false; 937 enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED }; 938 const char *stack_usage_kind_str[] = { 939 "static", 940 "dynamic", 941 "dynamic,bounded" 942 }; 943 HOST_WIDE_INT stack_usage = current_function_static_stack_size; 944 enum stack_usage_kind_type stack_usage_kind; 945 946 if (stack_usage < 0) 947 { 948 if (!warning_issued) 949 { 950 warning (0, "stack usage computation not supported for this target"); 951 warning_issued = true; 952 } 953 return; 954 } 955 956 stack_usage_kind = STATIC; 957 958 /* Add the maximum amount of space pushed onto the stack. */ 959 if (maybe_ne (current_function_pushed_stack_size, 0)) 960 { 961 HOST_WIDE_INT extra; 962 if (current_function_pushed_stack_size.is_constant (&extra)) 963 { 964 stack_usage += extra; 965 stack_usage_kind = DYNAMIC_BOUNDED; 966 } 967 else 968 { 969 extra = constant_lower_bound (current_function_pushed_stack_size); 970 stack_usage += extra; 971 stack_usage_kind = DYNAMIC; 972 } 973 } 974 975 /* Now on to the tricky part: dynamic stack allocation. */ 976 if (current_function_allocates_dynamic_stack_space) 977 { 978 if (stack_usage_kind != DYNAMIC) 979 { 980 if (current_function_has_unbounded_dynamic_stack_size) 981 stack_usage_kind = DYNAMIC; 982 else 983 stack_usage_kind = DYNAMIC_BOUNDED; 984 } 985 986 /* Add the size even in the unbounded case, this can't hurt. */ 987 stack_usage += current_function_dynamic_stack_size; 988 } 989 990 if (flag_stack_usage) 991 { 992 expanded_location loc 993 = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); 994 /* We don't want to print the full qualified name because it can be long, 995 so we strip the scope prefix, but we may need to deal with the suffix 996 created by the compiler. */ 997 const char *suffix 998 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), '.'); 999 const char *name 1000 = lang_hooks.decl_printable_name (current_function_decl, 2); 1001 if (suffix) 1002 { 1003 const char *dot = strchr (name, '.'); 1004 while (dot && strcasecmp (dot, suffix) != 0) 1005 { 1006 name = dot + 1; 1007 dot = strchr (name, '.'); 1008 } 1009 } 1010 else 1011 { 1012 const char *dot = strrchr (name, '.'); 1013 if (dot) 1014 name = dot + 1; 1015 } 1016 1017 fprintf (stack_usage_file, 1018 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC"\t%s\n", 1019 lbasename (loc.file), 1020 loc.line, 1021 loc.column, 1022 name, 1023 stack_usage, 1024 stack_usage_kind_str[stack_usage_kind]); 1025 } 1026 1027 if (warn_stack_usage >= 0) 1028 { 1029 const location_t loc = DECL_SOURCE_LOCATION (current_function_decl); 1030 1031 if (stack_usage_kind == DYNAMIC) 1032 warning_at (loc, OPT_Wstack_usage_, "stack usage might be unbounded"); 1033 else if (stack_usage > warn_stack_usage) 1034 { 1035 if (stack_usage_kind == DYNAMIC_BOUNDED) 1036 warning_at (loc, 1037 OPT_Wstack_usage_, "stack usage might be %wd bytes", 1038 stack_usage); 1039 else 1040 warning_at (loc, OPT_Wstack_usage_, "stack usage is %wd bytes", 1041 stack_usage); 1042 } 1043 } 1044 } 1045 1046 /* Open an auxiliary output file. */ 1047 static FILE * 1048 open_auxiliary_file (const char *ext) 1049 { 1050 char *filename; 1051 FILE *file; 1052 1053 filename = concat (aux_base_name, ".", ext, NULL); 1054 file = fopen (filename, "w"); 1055 if (!file) 1056 fatal_error (input_location, "can%'t open %s for writing: %m", filename); 1057 free (filename); 1058 return file; 1059 } 1060 1061 /* Alternative diagnostics callback for reentered ICE reporting. */ 1062 1063 static void 1064 internal_error_reentered (diagnostic_context *, const char *, va_list *) 1065 { 1066 /* Flush the dump file if emergency_dump_function itself caused an ICE. */ 1067 if (dump_file) 1068 fflush (dump_file); 1069 } 1070 1071 /* Auxiliary callback for the diagnostics code. */ 1072 1073 static void 1074 internal_error_function (diagnostic_context *, const char *, va_list *) 1075 { 1076 global_dc->internal_error = internal_error_reentered; 1077 warn_if_plugins (); 1078 emergency_dump_function (); 1079 } 1080 1081 /* Initialization of the front end environment, before command line 1082 options are parsed. Signal handlers, internationalization etc. 1083 ARGV0 is main's argv[0]. */ 1084 static void 1085 general_init (const char *argv0, bool init_signals) 1086 { 1087 const char *p; 1088 1089 p = argv0 + strlen (argv0); 1090 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1])) 1091 --p; 1092 progname = p; 1093 1094 xmalloc_set_program_name (progname); 1095 1096 hex_init (); 1097 1098 /* Unlock the stdio streams. */ 1099 unlock_std_streams (); 1100 1101 gcc_init_libintl (); 1102 1103 identifier_to_locale_alloc = alloc_for_identifier_to_locale; 1104 identifier_to_locale_free = ggc_free; 1105 1106 /* Initialize the diagnostics reporting machinery, so option parsing 1107 can give warnings and errors. */ 1108 diagnostic_initialize (global_dc, N_OPTS); 1109 /* Set a default printer. Language specific initializations will 1110 override it later. */ 1111 tree_diagnostics_defaults (global_dc); 1112 1113 global_dc->show_caret 1114 = global_options_init.x_flag_diagnostics_show_caret; 1115 global_dc->show_option_requested 1116 = global_options_init.x_flag_diagnostics_show_option; 1117 global_dc->show_column 1118 = global_options_init.x_flag_show_column; 1119 global_dc->internal_error = internal_error_function; 1120 global_dc->option_enabled = option_enabled; 1121 global_dc->option_state = &global_options; 1122 global_dc->option_name = option_name; 1123 1124 if (init_signals) 1125 { 1126 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */ 1127 #ifdef SIGSEGV 1128 signal (SIGSEGV, crash_signal); 1129 #endif 1130 #ifdef SIGILL 1131 signal (SIGILL, crash_signal); 1132 #endif 1133 #ifdef SIGBUS 1134 signal (SIGBUS, crash_signal); 1135 #endif 1136 #ifdef SIGABRT 1137 signal (SIGABRT, crash_signal); 1138 #endif 1139 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT) 1140 signal (SIGIOT, crash_signal); 1141 #endif 1142 #ifdef SIGFPE 1143 signal (SIGFPE, crash_signal); 1144 #endif 1145 1146 /* Other host-specific signal setup. */ 1147 (*host_hooks.extra_signals)(); 1148 } 1149 1150 /* Initialize the garbage-collector, string pools and tree type hash 1151 table. */ 1152 init_ggc (); 1153 init_stringpool (); 1154 input_location = UNKNOWN_LOCATION; 1155 line_table = ggc_alloc<line_maps> (); 1156 linemap_init (line_table, BUILTINS_LOCATION); 1157 line_table->reallocator = realloc_for_line_map; 1158 line_table->round_alloc_size = ggc_round_alloc_size; 1159 line_table->default_range_bits = 5; 1160 init_ttree (); 1161 1162 /* Initialize register usage now so switches may override. */ 1163 init_reg_sets (); 1164 1165 /* Register the language-independent parameters. */ 1166 global_init_params (); 1167 1168 /* This must be done after global_init_params but before argument 1169 processing. */ 1170 init_ggc_heuristics (); 1171 1172 /* Create the singleton holder for global state. This creates the 1173 dump manager. */ 1174 g = new gcc::context (); 1175 1176 /* Allow languages and middle-end to register their dumps before the 1177 optimization passes. */ 1178 g->get_dumps ()->register_dumps (); 1179 1180 /* Create the passes. */ 1181 g->set_passes (new gcc::pass_manager (g)); 1182 1183 symtab = new (ggc_cleared_alloc <symbol_table> ()) symbol_table (); 1184 1185 statistics_early_init (); 1186 finish_params (); 1187 } 1188 1189 /* Return true if the current target supports -fsection-anchors. */ 1190 1191 static bool 1192 target_supports_section_anchors_p (void) 1193 { 1194 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0) 1195 return false; 1196 1197 if (targetm.asm_out.output_anchor == NULL) 1198 return false; 1199 1200 return true; 1201 } 1202 1203 /* Default the align_* variables to 1 if they're still unset, and 1204 set up the align_*_log variables. */ 1205 static void 1206 init_alignments (void) 1207 { 1208 if (align_loops <= 0) 1209 align_loops = 1; 1210 if (align_loops_max_skip > align_loops) 1211 align_loops_max_skip = align_loops - 1; 1212 align_loops_log = floor_log2 (align_loops * 2 - 1); 1213 if (align_jumps <= 0) 1214 align_jumps = 1; 1215 if (align_jumps_max_skip > align_jumps) 1216 align_jumps_max_skip = align_jumps - 1; 1217 align_jumps_log = floor_log2 (align_jumps * 2 - 1); 1218 if (align_labels <= 0) 1219 align_labels = 1; 1220 align_labels_log = floor_log2 (align_labels * 2 - 1); 1221 if (align_labels_max_skip > align_labels) 1222 align_labels_max_skip = align_labels - 1; 1223 if (align_functions <= 0) 1224 align_functions = 1; 1225 align_functions_log = floor_log2 (align_functions * 2 - 1); 1226 } 1227 1228 /* Process the options that have been parsed. */ 1229 static void 1230 process_options (void) 1231 { 1232 /* Just in case lang_hooks.post_options ends up calling a debug_hook. 1233 This can happen with incorrect pre-processed input. */ 1234 debug_hooks = &do_nothing_debug_hooks; 1235 1236 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT; 1237 1238 /* Allow the front end to perform consistency checks and do further 1239 initialization based on the command line options. This hook also 1240 sets the original filename if appropriate (e.g. foo.i -> foo.c) 1241 so we can correctly initialize debug output. */ 1242 no_backend = lang_hooks.post_options (&main_input_filename); 1243 1244 /* Some machines may reject certain combinations of options. */ 1245 location_t saved_location = input_location; 1246 input_location = UNKNOWN_LOCATION; 1247 targetm.target_option.override (); 1248 input_location = saved_location; 1249 1250 if (flag_diagnostics_generate_patch) 1251 global_dc->edit_context_ptr = new edit_context (); 1252 1253 /* Avoid any informative notes in the second run of -fcompare-debug. */ 1254 if (flag_compare_debug) 1255 diagnostic_inhibit_notes (global_dc); 1256 1257 if (flag_section_anchors && !target_supports_section_anchors_p ()) 1258 { 1259 warning_at (UNKNOWN_LOCATION, OPT_fsection_anchors, 1260 "this target does not support %qs", 1261 "-fsection-anchors"); 1262 flag_section_anchors = 0; 1263 } 1264 1265 if (flag_short_enums == 2) 1266 flag_short_enums = targetm.default_short_enums (); 1267 1268 /* Set aux_base_name if not already set. */ 1269 if (aux_base_name) 1270 ; 1271 else if (main_input_filename) 1272 { 1273 char *name = xstrdup (lbasename (main_input_filename)); 1274 1275 strip_off_ending (name, strlen (name)); 1276 aux_base_name = name; 1277 } 1278 else 1279 aux_base_name = "gccaux"; 1280 1281 #ifndef HAVE_isl 1282 if (flag_graphite 1283 || flag_loop_nest_optimize 1284 || flag_graphite_identity 1285 || flag_loop_parallelize_all) 1286 sorry ("Graphite loop optimizations cannot be used (isl is not available) " 1287 "(-fgraphite, -fgraphite-identity, -floop-nest-optimize, " 1288 "-floop-parallelize-all)"); 1289 #endif 1290 1291 if (flag_cf_protection != CF_NONE 1292 && !(flag_cf_protection & CF_SET)) 1293 { 1294 if (flag_cf_protection == CF_FULL) 1295 { 1296 error_at (UNKNOWN_LOCATION, 1297 "%<-fcf-protection=full%> is not supported for this " 1298 "target"); 1299 flag_cf_protection = CF_NONE; 1300 } 1301 if (flag_cf_protection == CF_BRANCH) 1302 { 1303 error_at (UNKNOWN_LOCATION, 1304 "%<-fcf-protection=branch%> is not supported for this " 1305 "target"); 1306 flag_cf_protection = CF_NONE; 1307 } 1308 if (flag_cf_protection == CF_RETURN) 1309 { 1310 error_at (UNKNOWN_LOCATION, 1311 "%<-fcf-protection=return%> is not supported for this " 1312 "target"); 1313 flag_cf_protection = CF_NONE; 1314 } 1315 } 1316 1317 if (flag_check_pointer_bounds) 1318 { 1319 if (targetm.chkp_bound_mode () == VOIDmode) 1320 { 1321 error_at (UNKNOWN_LOCATION, 1322 "%<-fcheck-pointer-bounds%> is not supported for this " 1323 "target"); 1324 flag_check_pointer_bounds = 0; 1325 } 1326 1327 if (flag_sanitize & SANITIZE_BOUNDS_STRICT) 1328 { 1329 error_at (UNKNOWN_LOCATION, 1330 "%<-fcheck-pointer-bounds%> is not supported with " 1331 "%<-fsanitize=bounds-strict%>"); 1332 flag_check_pointer_bounds = 0; 1333 } 1334 else if (flag_sanitize & SANITIZE_BOUNDS) 1335 { 1336 error_at (UNKNOWN_LOCATION, 1337 "%<-fcheck-pointer-bounds%> is not supported with " 1338 "%<-fsanitize=bounds%>"); 1339 flag_check_pointer_bounds = 0; 1340 } 1341 1342 if (flag_sanitize & SANITIZE_ADDRESS) 1343 { 1344 error_at (UNKNOWN_LOCATION, 1345 "%<-fcheck-pointer-bounds%> is not supported with " 1346 "Address Sanitizer"); 1347 flag_check_pointer_bounds = 0; 1348 } 1349 1350 if (flag_sanitize & SANITIZE_THREAD) 1351 { 1352 error_at (UNKNOWN_LOCATION, 1353 "%<-fcheck-pointer-bounds%> is not supported with " 1354 "Thread Sanitizer"); 1355 1356 flag_check_pointer_bounds = 0; 1357 } 1358 } 1359 1360 /* One region RA really helps to decrease the code size. */ 1361 if (flag_ira_region == IRA_REGION_AUTODETECT) 1362 flag_ira_region 1363 = optimize_size || !optimize ? IRA_REGION_ONE : IRA_REGION_MIXED; 1364 1365 if (!abi_version_at_least (2)) 1366 { 1367 /* -fabi-version=1 support was removed after GCC 4.9. */ 1368 error_at (UNKNOWN_LOCATION, 1369 "%<-fabi-version=1%> is no longer supported"); 1370 flag_abi_version = 2; 1371 } 1372 1373 /* Unrolling all loops implies that standard loop unrolling must also 1374 be done. */ 1375 if (flag_unroll_all_loops) 1376 flag_unroll_loops = 1; 1377 1378 /* web and rename-registers help when run after loop unrolling. */ 1379 if (flag_web == AUTODETECT_VALUE) 1380 flag_web = flag_unroll_loops; 1381 1382 if (flag_rename_registers == AUTODETECT_VALUE) 1383 flag_rename_registers = flag_unroll_loops; 1384 1385 if (flag_non_call_exceptions) 1386 flag_asynchronous_unwind_tables = 1; 1387 if (flag_asynchronous_unwind_tables) 1388 flag_unwind_tables = 1; 1389 1390 if (flag_value_profile_transformations) 1391 flag_profile_values = 1; 1392 1393 /* Warn about options that are not supported on this machine. */ 1394 #ifndef INSN_SCHEDULING 1395 if (flag_schedule_insns || flag_schedule_insns_after_reload) 1396 warning_at (UNKNOWN_LOCATION, 0, 1397 "instruction scheduling not supported on this target machine"); 1398 #endif 1399 if (!DELAY_SLOTS && flag_delayed_branch) 1400 warning_at (UNKNOWN_LOCATION, 0, 1401 "this target machine does not have delayed branches"); 1402 1403 user_label_prefix = USER_LABEL_PREFIX; 1404 if (flag_leading_underscore != -1) 1405 { 1406 /* If the default prefix is more complicated than "" or "_", 1407 issue a warning and ignore this option. */ 1408 if (user_label_prefix[0] == 0 || 1409 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0)) 1410 { 1411 user_label_prefix = flag_leading_underscore ? "_" : ""; 1412 } 1413 else 1414 warning_at (UNKNOWN_LOCATION, 0, 1415 "-f%sleading-underscore not supported on this " 1416 "target machine", flag_leading_underscore ? "" : "no-"); 1417 } 1418 1419 /* If we are in verbose mode, write out the version and maybe all the 1420 option flags in use. */ 1421 if (version_flag) 1422 { 1423 print_version (stderr, "", true); 1424 if (! quiet_flag) 1425 print_switch_values (print_to_stderr); 1426 } 1427 1428 if (flag_syntax_only) 1429 { 1430 write_symbols = NO_DEBUG; 1431 profile_flag = 0; 1432 } 1433 1434 if (flag_gtoggle) 1435 { 1436 if (debug_info_level == DINFO_LEVEL_NONE) 1437 { 1438 debug_info_level = DINFO_LEVEL_NORMAL; 1439 1440 if (write_symbols == NO_DEBUG) 1441 write_symbols = PREFERRED_DEBUGGING_TYPE; 1442 } 1443 else 1444 debug_info_level = DINFO_LEVEL_NONE; 1445 } 1446 1447 if (flag_dump_final_insns && !flag_syntax_only && !no_backend) 1448 { 1449 FILE *final_output = fopen (flag_dump_final_insns, "w"); 1450 if (!final_output) 1451 { 1452 error_at (UNKNOWN_LOCATION, 1453 "could not open final insn dump file %qs: %m", 1454 flag_dump_final_insns); 1455 flag_dump_final_insns = NULL; 1456 } 1457 else if (fclose (final_output)) 1458 { 1459 error_at (UNKNOWN_LOCATION, 1460 "could not close zeroed insn dump file %qs: %m", 1461 flag_dump_final_insns); 1462 flag_dump_final_insns = NULL; 1463 } 1464 } 1465 1466 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging 1467 level is 0. */ 1468 if (debug_info_level == DINFO_LEVEL_NONE) 1469 write_symbols = NO_DEBUG; 1470 1471 if (write_symbols == NO_DEBUG) 1472 ; 1473 #if defined(DBX_DEBUGGING_INFO) 1474 else if (write_symbols == DBX_DEBUG) 1475 debug_hooks = &dbx_debug_hooks; 1476 #endif 1477 #if defined(XCOFF_DEBUGGING_INFO) 1478 else if (write_symbols == XCOFF_DEBUG) 1479 debug_hooks = &xcoff_debug_hooks; 1480 #endif 1481 #ifdef DWARF2_DEBUGGING_INFO 1482 else if (write_symbols == DWARF2_DEBUG) 1483 debug_hooks = &dwarf2_debug_hooks; 1484 #endif 1485 #ifdef VMS_DEBUGGING_INFO 1486 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) 1487 debug_hooks = &vmsdbg_debug_hooks; 1488 #endif 1489 #ifdef DWARF2_LINENO_DEBUGGING_INFO 1490 else if (write_symbols == DWARF2_DEBUG) 1491 debug_hooks = &dwarf2_lineno_debug_hooks; 1492 #endif 1493 else 1494 error_at (UNKNOWN_LOCATION, 1495 "target system does not support the %qs debug format", 1496 debug_type_names[write_symbols]); 1497 1498 /* We know which debug output will be used so we can set flag_var_tracking 1499 and flag_var_tracking_uninit if the user has not specified them. */ 1500 if (debug_info_level < DINFO_LEVEL_NORMAL 1501 || debug_hooks->var_location == do_nothing_debug_hooks.var_location) 1502 { 1503 if (flag_var_tracking == 1 1504 || flag_var_tracking_uninit == 1) 1505 { 1506 if (debug_info_level < DINFO_LEVEL_NORMAL) 1507 warning_at (UNKNOWN_LOCATION, 0, 1508 "variable tracking requested, but useless unless " 1509 "producing debug info"); 1510 else 1511 warning_at (UNKNOWN_LOCATION, 0, 1512 "variable tracking requested, but not supported " 1513 "by this debug format"); 1514 } 1515 flag_var_tracking = 0; 1516 flag_var_tracking_uninit = 0; 1517 } 1518 1519 /* The debug hooks are used to implement -fdump-go-spec because it 1520 gives a simple and stable API for all the information we need to 1521 dump. */ 1522 if (flag_dump_go_spec != NULL) 1523 debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks); 1524 1525 /* If the user specifically requested variable tracking with tagging 1526 uninitialized variables, we need to turn on variable tracking. 1527 (We already determined above that variable tracking is feasible.) */ 1528 if (flag_var_tracking_uninit == 1) 1529 flag_var_tracking = 1; 1530 1531 if (flag_var_tracking == AUTODETECT_VALUE) 1532 flag_var_tracking = optimize >= 1; 1533 1534 if (flag_var_tracking_uninit == AUTODETECT_VALUE) 1535 flag_var_tracking_uninit = flag_var_tracking; 1536 1537 if (flag_var_tracking_assignments == AUTODETECT_VALUE) 1538 flag_var_tracking_assignments 1539 = (flag_var_tracking 1540 && !(flag_selective_scheduling || flag_selective_scheduling2)); 1541 1542 if (flag_var_tracking_assignments_toggle) 1543 flag_var_tracking_assignments = !flag_var_tracking_assignments; 1544 1545 if (flag_var_tracking_assignments && !flag_var_tracking) 1546 flag_var_tracking = flag_var_tracking_assignments = -1; 1547 1548 if (flag_var_tracking_assignments 1549 && (flag_selective_scheduling || flag_selective_scheduling2)) 1550 warning_at (UNKNOWN_LOCATION, 0, 1551 "var-tracking-assignments changes selective scheduling"); 1552 1553 if (debug_nonbind_markers_p == AUTODETECT_VALUE) 1554 debug_nonbind_markers_p 1555 = (optimize 1556 && debug_info_level >= DINFO_LEVEL_NORMAL 1557 && (write_symbols == DWARF2_DEBUG 1558 || write_symbols == VMS_AND_DWARF2_DEBUG) 1559 && !(flag_selective_scheduling || flag_selective_scheduling2)); 1560 1561 if (dwarf2out_as_loc_support == AUTODETECT_VALUE) 1562 dwarf2out_as_loc_support 1563 = dwarf2out_default_as_loc_support (); 1564 if (dwarf2out_as_locview_support == AUTODETECT_VALUE) 1565 dwarf2out_as_locview_support 1566 = dwarf2out_default_as_locview_support (); 1567 1568 if (debug_variable_location_views == AUTODETECT_VALUE) 1569 { 1570 debug_variable_location_views 1571 = (flag_var_tracking 1572 && debug_info_level >= DINFO_LEVEL_NORMAL 1573 && (write_symbols == DWARF2_DEBUG 1574 || write_symbols == VMS_AND_DWARF2_DEBUG) 1575 && !dwarf_strict 1576 && dwarf2out_as_loc_support 1577 && dwarf2out_as_locview_support); 1578 } 1579 else if (debug_variable_location_views == -1 && dwarf_version != 5) 1580 { 1581 warning_at (UNKNOWN_LOCATION, 0, 1582 "without -gdwarf-5, -gvariable-location-views=incompat5 " 1583 "is equivalent to -gvariable-location-views"); 1584 debug_variable_location_views = 1; 1585 } 1586 1587 if (debug_internal_reset_location_views == 2) 1588 { 1589 debug_internal_reset_location_views 1590 = (debug_variable_location_views 1591 && targetm.reset_location_view); 1592 } 1593 else if (debug_internal_reset_location_views 1594 && !debug_variable_location_views) 1595 { 1596 warning_at (UNKNOWN_LOCATION, 0, 1597 "-ginternal-reset-location-views is forced disabled " 1598 "without -gvariable-location-views"); 1599 debug_internal_reset_location_views = 0; 1600 } 1601 1602 if (debug_inline_points == AUTODETECT_VALUE) 1603 debug_inline_points = debug_variable_location_views; 1604 else if (debug_inline_points && !debug_nonbind_markers_p) 1605 { 1606 warning_at (UNKNOWN_LOCATION, 0, 1607 "-ginline-points is forced disabled without " 1608 "-gstatement-frontiers"); 1609 debug_inline_points = 0; 1610 } 1611 1612 if (flag_tree_cselim == AUTODETECT_VALUE) 1613 { 1614 if (HAVE_conditional_move) 1615 flag_tree_cselim = 1; 1616 else 1617 flag_tree_cselim = 0; 1618 } 1619 1620 /* If auxiliary info generation is desired, open the output file. 1621 This goes in the same directory as the source file--unlike 1622 all the other output files. */ 1623 if (flag_gen_aux_info) 1624 { 1625 aux_info_file = fopen (aux_info_file_name, "w"); 1626 if (aux_info_file == 0) 1627 fatal_error (UNKNOWN_LOCATION, 1628 "can%'t open %s: %m", aux_info_file_name); 1629 } 1630 1631 if (!targetm_common.have_named_sections) 1632 { 1633 if (flag_function_sections) 1634 { 1635 warning_at (UNKNOWN_LOCATION, 0, 1636 "-ffunction-sections not supported for this target"); 1637 flag_function_sections = 0; 1638 } 1639 if (flag_data_sections) 1640 { 1641 warning_at (UNKNOWN_LOCATION, 0, 1642 "-fdata-sections not supported for this target"); 1643 flag_data_sections = 0; 1644 } 1645 } 1646 1647 if (flag_prefetch_loop_arrays > 0 && !targetm.code_for_prefetch) 1648 { 1649 warning_at (UNKNOWN_LOCATION, 0, 1650 "-fprefetch-loop-arrays not supported for this target"); 1651 flag_prefetch_loop_arrays = 0; 1652 } 1653 else if (flag_prefetch_loop_arrays > 0 && !targetm.have_prefetch ()) 1654 { 1655 warning_at (UNKNOWN_LOCATION, 0, 1656 "-fprefetch-loop-arrays not supported for this target " 1657 "(try -march switches)"); 1658 flag_prefetch_loop_arrays = 0; 1659 } 1660 1661 /* This combination of options isn't handled for i386 targets and doesn't 1662 make much sense anyway, so don't allow it. */ 1663 if (flag_prefetch_loop_arrays > 0 && optimize_size) 1664 { 1665 warning_at (UNKNOWN_LOCATION, 0, 1666 "-fprefetch-loop-arrays is not supported with -Os"); 1667 flag_prefetch_loop_arrays = 0; 1668 } 1669 1670 /* The presence of IEEE signaling NaNs, implies all math can trap. */ 1671 if (flag_signaling_nans) 1672 flag_trapping_math = 1; 1673 1674 /* We cannot reassociate if we want traps or signed zeros. */ 1675 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros)) 1676 { 1677 warning_at (UNKNOWN_LOCATION, 0, 1678 "-fassociative-math disabled; other options take " 1679 "precedence"); 1680 flag_associative_math = 0; 1681 } 1682 1683 /* -fstack-clash-protection is not currently supported on targets 1684 where the stack grows up. */ 1685 if (flag_stack_clash_protection && !STACK_GROWS_DOWNWARD) 1686 { 1687 warning_at (UNKNOWN_LOCATION, 0, 1688 "%<-fstack-clash-protection%> is not supported on targets " 1689 "where the stack grows from lower to higher addresses"); 1690 flag_stack_clash_protection = 0; 1691 } 1692 1693 /* We can not support -fstack-check= and -fstack-clash-protection at 1694 the same time. */ 1695 if (flag_stack_check != NO_STACK_CHECK && flag_stack_clash_protection) 1696 { 1697 warning_at (UNKNOWN_LOCATION, 0, 1698 "%<-fstack-check=%> and %<-fstack-clash_protection%> are " 1699 "mutually exclusive. Disabling %<-fstack-check=%>"); 1700 flag_stack_check = NO_STACK_CHECK; 1701 } 1702 1703 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */ 1704 if (flag_cx_limited_range) 1705 flag_complex_method = 0; 1706 1707 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */ 1708 if (flag_cx_fortran_rules) 1709 flag_complex_method = 1; 1710 1711 /* Targets must be able to place spill slots at lower addresses. If the 1712 target already uses a soft frame pointer, the transition is trivial. */ 1713 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect) 1714 { 1715 warning_at (UNKNOWN_LOCATION, 0, 1716 "-fstack-protector not supported for this target"); 1717 flag_stack_protect = 0; 1718 } 1719 if (!flag_stack_protect) 1720 warn_stack_protect = 0; 1721 1722 /* Address Sanitizer needs porting to each target architecture. */ 1723 1724 if ((flag_sanitize & SANITIZE_ADDRESS) 1725 && !FRAME_GROWS_DOWNWARD) 1726 { 1727 warning_at (UNKNOWN_LOCATION, 0, 1728 "-fsanitize=address and -fsanitize=kernel-address " 1729 "are not supported for this target"); 1730 flag_sanitize &= ~SANITIZE_ADDRESS; 1731 } 1732 1733 if ((flag_sanitize & SANITIZE_USER_ADDRESS) 1734 && targetm.asan_shadow_offset == NULL) 1735 { 1736 warning_at (UNKNOWN_LOCATION, 0, 1737 "-fsanitize=address not supported for this target"); 1738 flag_sanitize &= ~SANITIZE_ADDRESS; 1739 } 1740 1741 /* Do not use IPA optimizations for register allocation if profiler is active 1742 or patchable function entries are inserted for run-time instrumentation 1743 or port does not emit prologue and epilogue as RTL. */ 1744 if (profile_flag || function_entry_patch_area_size 1745 || !targetm.have_prologue () || !targetm.have_epilogue ()) 1746 flag_ipa_ra = 0; 1747 1748 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error 1749 have not been set. */ 1750 if (!global_options_set.x_warnings_are_errors 1751 && warn_coverage_mismatch 1752 && (global_dc->classify_diagnostic[OPT_Wcoverage_mismatch] == 1753 DK_UNSPECIFIED)) 1754 diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_mismatch, 1755 DK_ERROR, UNKNOWN_LOCATION); 1756 1757 /* Save the current optimization options. */ 1758 optimization_default_node = build_optimization_node (&global_options); 1759 optimization_current_node = optimization_default_node; 1760 1761 /* Please don't change global_options after this point, those changes won't 1762 be reflected in optimization_{default,current}_node. */ 1763 } 1764 1765 /* This function can be called multiple times to reinitialize the compiler 1766 back end when register classes or instruction sets have changed, 1767 before each function. */ 1768 static void 1769 backend_init_target (void) 1770 { 1771 /* Initialize alignment variables. */ 1772 init_alignments (); 1773 1774 /* This depends on stack_pointer_rtx. */ 1775 init_fake_stack_mems (); 1776 1777 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is 1778 mode-dependent. */ 1779 init_alias_target (); 1780 1781 /* Depends on HARD_FRAME_POINTER_REGNUM. */ 1782 if (!ira_use_lra_p) 1783 init_reload (); 1784 1785 /* Depends on the enabled attribute. */ 1786 recog_init (); 1787 1788 /* The following initialization functions need to generate rtl, so 1789 provide a dummy function context for them. */ 1790 init_dummy_function_start (); 1791 1792 /* rtx_cost is mode-dependent, so cached values need to be recomputed 1793 on a mode change. */ 1794 init_expmed (); 1795 init_lower_subreg (); 1796 init_set_costs (); 1797 1798 init_expr_target (); 1799 ira_init (); 1800 1801 /* We may need to recompute regno_save_code[] and regno_restore_code[] 1802 after a mode change as well. */ 1803 caller_save_initialized_p = false; 1804 1805 expand_dummy_function_end (); 1806 } 1807 1808 /* Initialize the compiler back end. This function is called only once, 1809 when starting the compiler. */ 1810 static void 1811 backend_init (void) 1812 { 1813 init_emit_once (); 1814 1815 init_rtlanal (); 1816 init_inline_once (); 1817 init_varasm_once (); 1818 save_register_info (); 1819 1820 /* Middle end needs this initialization for default mem attributes 1821 used by early calls to make_decl_rtl. */ 1822 init_emit_regs (); 1823 1824 /* Middle end needs this initialization for mode tables used to assign 1825 modes to vector variables. */ 1826 init_regs (); 1827 } 1828 1829 /* Initialize excess precision settings. 1830 1831 We have no need to modify anything here, just keep track of what the 1832 user requested. We'll figure out any appropriate relaxations 1833 later. */ 1834 1835 static void 1836 init_excess_precision (void) 1837 { 1838 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT); 1839 flag_excess_precision = flag_excess_precision_cmdline; 1840 } 1841 1842 /* Initialize things that are both lang-dependent and target-dependent. 1843 This function can be called more than once if target parameters change. */ 1844 static void 1845 lang_dependent_init_target (void) 1846 { 1847 /* This determines excess precision settings. */ 1848 init_excess_precision (); 1849 1850 /* This creates various _DECL nodes, so needs to be called after the 1851 front end is initialized. It also depends on the HAVE_xxx macros 1852 generated from the target machine description. */ 1853 init_optabs (); 1854 1855 gcc_assert (!this_target_rtl->target_specific_initialized); 1856 } 1857 1858 /* Perform initializations that are lang-dependent or target-dependent. 1859 but matters only for late optimizations and RTL generation. */ 1860 1861 static int rtl_initialized; 1862 1863 void 1864 initialize_rtl (void) 1865 { 1866 auto_timevar tv (g_timer, TV_INITIALIZE_RTL); 1867 1868 /* Initialization done just once per compilation, but delayed 1869 till code generation. */ 1870 if (!rtl_initialized) 1871 ira_init_once (); 1872 rtl_initialized = true; 1873 1874 /* Target specific RTL backend initialization. */ 1875 if (!this_target_rtl->target_specific_initialized) 1876 { 1877 backend_init_target (); 1878 this_target_rtl->target_specific_initialized = true; 1879 } 1880 } 1881 1882 /* Language-dependent initialization. Returns nonzero on success. */ 1883 static int 1884 lang_dependent_init (const char *name) 1885 { 1886 location_t save_loc = input_location; 1887 if (dump_base_name == 0) 1888 dump_base_name = name && name[0] ? name : "gccdump"; 1889 1890 /* Other front-end initialization. */ 1891 input_location = BUILTINS_LOCATION; 1892 if (lang_hooks.init () == 0) 1893 return 0; 1894 input_location = save_loc; 1895 1896 if (!flag_wpa) 1897 { 1898 init_asm_output (name); 1899 1900 /* If stack usage information is desired, open the output file. */ 1901 if (flag_stack_usage) 1902 stack_usage_file = open_auxiliary_file ("su"); 1903 } 1904 1905 /* This creates various _DECL nodes, so needs to be called after the 1906 front end is initialized. */ 1907 init_eh (); 1908 1909 /* Do the target-specific parts of the initialization. */ 1910 lang_dependent_init_target (); 1911 1912 if (!flag_wpa) 1913 { 1914 /* If dbx symbol table desired, initialize writing it and output the 1915 predefined types. */ 1916 timevar_push (TV_SYMOUT); 1917 1918 /* Now we have the correct original filename, we can initialize 1919 debug output. */ 1920 (*debug_hooks->init) (name); 1921 1922 timevar_pop (TV_SYMOUT); 1923 } 1924 1925 return 1; 1926 } 1927 1928 1929 /* Reinitialize everything when target parameters, such as register usage, 1930 have changed. */ 1931 void 1932 target_reinit (void) 1933 { 1934 struct rtl_data saved_x_rtl; 1935 rtx *saved_regno_reg_rtx; 1936 tree saved_optimization_current_node; 1937 struct target_optabs *saved_this_fn_optabs; 1938 1939 /* Temporarily switch to the default optimization node, so that 1940 *this_target_optabs is set to the default, not reflecting 1941 whatever a previous function used for the optimize 1942 attribute. */ 1943 saved_optimization_current_node = optimization_current_node; 1944 saved_this_fn_optabs = this_fn_optabs; 1945 if (saved_optimization_current_node != optimization_default_node) 1946 { 1947 optimization_current_node = optimization_default_node; 1948 cl_optimization_restore 1949 (&global_options, 1950 TREE_OPTIMIZATION (optimization_default_node)); 1951 } 1952 this_fn_optabs = this_target_optabs; 1953 1954 /* Save *crtl and regno_reg_rtx around the reinitialization 1955 to allow target_reinit being called even after prepare_function_start. */ 1956 saved_regno_reg_rtx = regno_reg_rtx; 1957 if (saved_regno_reg_rtx) 1958 { 1959 saved_x_rtl = *crtl; 1960 memset (crtl, '\0', sizeof (*crtl)); 1961 regno_reg_rtx = NULL; 1962 } 1963 1964 this_target_rtl->target_specific_initialized = false; 1965 1966 /* This initializes hard_frame_pointer, and calls init_reg_modes_target() 1967 to initialize reg_raw_mode[]. */ 1968 init_emit_regs (); 1969 1970 /* This invokes target hooks to set fixed_reg[] etc, which is 1971 mode-dependent. */ 1972 init_regs (); 1973 1974 /* Reinitialize lang-dependent parts. */ 1975 lang_dependent_init_target (); 1976 1977 /* Restore the original optimization node. */ 1978 if (saved_optimization_current_node != optimization_default_node) 1979 { 1980 optimization_current_node = saved_optimization_current_node; 1981 cl_optimization_restore (&global_options, 1982 TREE_OPTIMIZATION (optimization_current_node)); 1983 } 1984 this_fn_optabs = saved_this_fn_optabs; 1985 1986 /* Restore regno_reg_rtx at the end, as free_after_compilation from 1987 expand_dummy_function_end clears it. */ 1988 if (saved_regno_reg_rtx) 1989 { 1990 *crtl = saved_x_rtl; 1991 regno_reg_rtx = saved_regno_reg_rtx; 1992 saved_regno_reg_rtx = NULL; 1993 } 1994 } 1995 1996 void 1997 dump_memory_report (bool final) 1998 { 1999 dump_line_table_statistics (); 2000 ggc_print_statistics (); 2001 stringpool_statistics (); 2002 dump_tree_statistics (); 2003 dump_gimple_statistics (); 2004 dump_rtx_statistics (); 2005 dump_alloc_pool_statistics (); 2006 dump_bitmap_statistics (); 2007 dump_hash_table_loc_statistics (); 2008 dump_vec_loc_statistics (); 2009 dump_ggc_loc_statistics (final); 2010 dump_alias_stats (stderr); 2011 dump_pta_stats (stderr); 2012 } 2013 2014 /* Clean up: close opened files, etc. */ 2015 2016 static void 2017 finalize (bool no_backend) 2018 { 2019 /* Close the dump files. */ 2020 if (flag_gen_aux_info) 2021 { 2022 fclose (aux_info_file); 2023 aux_info_file = NULL; 2024 if (seen_error ()) 2025 unlink (aux_info_file_name); 2026 } 2027 2028 /* Close non-debugging input and output files. Take special care to note 2029 whether fclose returns an error, since the pages might still be on the 2030 buffer chain while the file is open. */ 2031 2032 if (asm_out_file) 2033 { 2034 if (ferror (asm_out_file) != 0) 2035 fatal_error (input_location, "error writing to %s: %m", asm_file_name); 2036 if (fclose (asm_out_file) != 0) 2037 fatal_error (input_location, "error closing %s: %m", asm_file_name); 2038 asm_out_file = NULL; 2039 } 2040 2041 if (stack_usage_file) 2042 { 2043 fclose (stack_usage_file); 2044 stack_usage_file = NULL; 2045 } 2046 2047 if (seen_error ()) 2048 coverage_remove_note_file (); 2049 2050 if (!no_backend) 2051 { 2052 statistics_fini (); 2053 2054 g->get_passes ()->finish_optimization_passes (); 2055 2056 lra_finish_once (); 2057 } 2058 2059 if (mem_report) 2060 dump_memory_report (true); 2061 2062 if (profile_report) 2063 dump_profile_report (); 2064 2065 /* Language-specific end of compilation actions. */ 2066 lang_hooks.finish (); 2067 } 2068 2069 static bool 2070 standard_type_bitsize (int bitsize) 2071 { 2072 /* As a special exception, we always want __int128 enabled if possible. */ 2073 if (bitsize == 128) 2074 return false; 2075 if (bitsize == CHAR_TYPE_SIZE 2076 || bitsize == SHORT_TYPE_SIZE 2077 || bitsize == INT_TYPE_SIZE 2078 || bitsize == LONG_TYPE_SIZE 2079 || bitsize == LONG_LONG_TYPE_SIZE) 2080 return true; 2081 return false; 2082 } 2083 2084 /* Initialize the compiler, and compile the input file. */ 2085 static void 2086 do_compile () 2087 { 2088 process_options (); 2089 2090 /* Don't do any more if an error has already occurred. */ 2091 if (!seen_error ()) 2092 { 2093 int i; 2094 2095 timevar_start (TV_PHASE_SETUP); 2096 2097 /* This must be run always, because it is needed to compute the FP 2098 predefined macros, such as __LDBL_MAX__, for targets using non 2099 default FP formats. */ 2100 init_adjust_machine_modes (); 2101 init_derived_machine_modes (); 2102 2103 /* This must happen after the backend has a chance to process 2104 command line options, but before the parsers are 2105 initialized. */ 2106 for (i = 0; i < NUM_INT_N_ENTS; i ++) 2107 if (targetm.scalar_mode_supported_p (int_n_data[i].m) 2108 && ! standard_type_bitsize (int_n_data[i].bitsize)) 2109 int_n_enabled_p[i] = true; 2110 else 2111 int_n_enabled_p[i] = false; 2112 2113 /* Set up the back-end if requested. */ 2114 if (!no_backend) 2115 backend_init (); 2116 2117 /* Language-dependent initialization. Returns true on success. */ 2118 if (lang_dependent_init (main_input_filename)) 2119 { 2120 /* Initialize yet another pass. */ 2121 2122 ggc_protect_identifiers = true; 2123 2124 symtab->initialize (); 2125 init_final (main_input_filename); 2126 coverage_init (aux_base_name); 2127 statistics_init (); 2128 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL); 2129 2130 timevar_stop (TV_PHASE_SETUP); 2131 2132 compile_file (); 2133 } 2134 else 2135 { 2136 timevar_stop (TV_PHASE_SETUP); 2137 } 2138 2139 timevar_start (TV_PHASE_FINALIZE); 2140 2141 finalize (no_backend); 2142 2143 timevar_stop (TV_PHASE_FINALIZE); 2144 } 2145 } 2146 2147 toplev::toplev (timer *external_timer, 2148 bool init_signals) 2149 : m_use_TV_TOTAL (external_timer == NULL), 2150 m_init_signals (init_signals) 2151 { 2152 if (external_timer) 2153 g_timer = external_timer; 2154 } 2155 2156 toplev::~toplev () 2157 { 2158 if (g_timer && m_use_TV_TOTAL) 2159 { 2160 g_timer->stop (TV_TOTAL); 2161 g_timer->print (stderr); 2162 delete g_timer; 2163 g_timer = NULL; 2164 } 2165 } 2166 2167 /* Potentially call timevar_init (which will create g_timevars if it 2168 doesn't already exist). */ 2169 2170 void 2171 toplev::start_timevars () 2172 { 2173 if (time_report || !quiet_flag || flag_detailed_statistics) 2174 timevar_init (); 2175 2176 timevar_start (TV_TOTAL); 2177 } 2178 2179 /* Handle -fself-test. */ 2180 2181 void 2182 toplev::run_self_tests () 2183 { 2184 if (no_backend) 2185 { 2186 error_at (UNKNOWN_LOCATION, "self-tests incompatible with -E"); 2187 return; 2188 } 2189 #if CHECKING_P 2190 /* Reset some state. */ 2191 input_location = UNKNOWN_LOCATION; 2192 bitmap_obstack_initialize (NULL); 2193 2194 /* Run the tests; any failures will lead to an abort of the process. 2195 Use "make selftests-gdb" to run under the debugger. */ 2196 ::selftest::run_tests (); 2197 2198 /* Cleanup. */ 2199 bitmap_obstack_release (NULL); 2200 #else 2201 inform (UNKNOWN_LOCATION, "self-tests are not enabled in this build"); 2202 #endif /* #if CHECKING_P */ 2203 } 2204 2205 /* Entry point of cc1, cc1plus, jc1, f771, etc. 2206 Exit code is FATAL_EXIT_CODE if can't open files or if there were 2207 any errors, or SUCCESS_EXIT_CODE if compilation succeeded. 2208 2209 It is not safe to call this function more than once. */ 2210 2211 int 2212 toplev::main (int argc, char **argv) 2213 { 2214 /* Parsing and gimplification sometimes need quite large stack. 2215 Increase stack size limits if possible. */ 2216 stack_limit_increase (64 * 1024 * 1024); 2217 2218 expandargv (&argc, &argv); 2219 2220 /* Initialization of GCC's environment, and diagnostics. */ 2221 general_init (argv[0], m_init_signals); 2222 2223 /* One-off initialization of options that does not need to be 2224 repeated when options are added for particular functions. */ 2225 init_options_once (); 2226 init_opts_obstack (); 2227 2228 /* Initialize global options structures; this must be repeated for 2229 each structure used for parsing options. */ 2230 init_options_struct (&global_options, &global_options_set); 2231 lang_hooks.init_options_struct (&global_options); 2232 2233 /* Convert the options to an array. */ 2234 decode_cmdline_options_to_array_default_mask (argc, 2235 CONST_CAST2 (const char **, 2236 char **, argv), 2237 &save_decoded_options, 2238 &save_decoded_options_count); 2239 2240 /* Perform language-specific options initialization. */ 2241 lang_hooks.init_options (save_decoded_options_count, save_decoded_options); 2242 2243 /* Parse the options and do minimal processing; basically just 2244 enough to default flags appropriately. */ 2245 decode_options (&global_options, &global_options_set, 2246 save_decoded_options, save_decoded_options_count, 2247 UNKNOWN_LOCATION, global_dc, 2248 targetm.target_option.override); 2249 2250 handle_common_deferred_options (); 2251 2252 init_local_tick (); 2253 2254 initialize_plugins (); 2255 2256 if (version_flag) 2257 print_version (stderr, "", true); 2258 2259 if (help_flag) 2260 print_plugins_help (stderr, ""); 2261 2262 /* Exit early if we can (e.g. -help). */ 2263 if (!exit_after_options) 2264 { 2265 if (m_use_TV_TOTAL) 2266 start_timevars (); 2267 do_compile (); 2268 } 2269 2270 if (warningcount || errorcount || werrorcount) 2271 print_ignored_options (); 2272 2273 if (flag_self_test) 2274 run_self_tests (); 2275 2276 /* Invoke registered plugin callbacks if any. Some plugins could 2277 emit some diagnostics here. */ 2278 invoke_plugin_callbacks (PLUGIN_FINISH, NULL); 2279 2280 if (flag_diagnostics_generate_patch) 2281 { 2282 gcc_assert (global_dc->edit_context_ptr); 2283 2284 pretty_printer pp; 2285 pp_show_color (&pp) = pp_show_color (global_dc->printer); 2286 global_dc->edit_context_ptr->print_diff (&pp, true); 2287 pp_flush (&pp); 2288 } 2289 2290 diagnostic_finish (global_dc); 2291 2292 finalize_plugins (); 2293 2294 after_memory_report = true; 2295 2296 if (seen_error () || werrorcount) 2297 return (FATAL_EXIT_CODE); 2298 2299 return (SUCCESS_EXIT_CODE); 2300 } 2301 2302 /* For those that want to, this function aims to clean up enough state that 2303 you can call toplev::main again. */ 2304 void 2305 toplev::finalize (void) 2306 { 2307 rtl_initialized = false; 2308 this_target_rtl->target_specific_initialized = false; 2309 2310 /* Needs to be called before cgraph_c_finalize since it uses symtab. */ 2311 ipa_reference_c_finalize (); 2312 ipa_fnsummary_c_finalize (); 2313 2314 cgraph_c_finalize (); 2315 cgraphunit_c_finalize (); 2316 dwarf2out_c_finalize (); 2317 gcse_c_finalize (); 2318 ipa_cp_c_finalize (); 2319 ira_costs_c_finalize (); 2320 params_c_finalize (); 2321 2322 finalize_options_struct (&global_options); 2323 finalize_options_struct (&global_options_set); 2324 2325 /* save_decoded_options uses opts_obstack, so these must 2326 be cleaned up together. */ 2327 obstack_free (&opts_obstack, NULL); 2328 XDELETEVEC (save_decoded_options); 2329 save_decoded_options = NULL; 2330 save_decoded_options_count = 0; 2331 2332 /* Clean up the context (and pass_manager etc). */ 2333 delete g; 2334 g = NULL; 2335 2336 } 2337