gcc/print-rtl.c

   1 /* Print RTL for GCC.
   2    Copyright (C) 1987-2013 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 file is compiled twice: once for the generator programs,
  21    once for the compiler.  */
  22 #ifdef GENERATOR_FILE
  23 #include "bconfig.h"
  24 #else
  25 #include "config.h"
  26 #endif
  27
  28 #include "system.h"
  29 #include "coretypes.h"
  30 #include "tm.h"
  31 #include "rtl.h"
  32
  33 /* These headers all define things which are not available in
  34    generator programs.  */
  35 #ifndef GENERATOR_FILE
  36 #include "tree.h"
  37 #include "flags.h"
  38 #include "hard-reg-set.h"
  39 #include "basic-block.h"
  40 #include "diagnostic.h"
  41 #include "tree-pretty-print.h"
  42 #include "cselib.h"
  43 #include "dumpfile.h"   /* for dump_flags */
  44 #include "dwarf2out.h"
  45 #endif
  46
  47 static FILE *outfile;
  48
  49 static int sawclose = 0;
  50
  51 static int indent;
  52
  53 static void print_rtx (const_rtx);
  54
  55 /* String printed at beginning of each RTL when it is dumped.
  56    This string is set to ASM_COMMENT_START when the RTL is dumped in
  57    the assembly output file.  */
  58 const char *print_rtx_head = "";
  59
  60 #ifdef GENERATOR_FILE
  61 /* These are defined from the .opt file when not used in generator
  62    programs.  */
  63
  64 /* Nonzero means suppress output of instruction numbers
  65    in debugging dumps.
  66    This must be defined here so that programs like gencodes can be linked.  */
  67 int flag_dump_unnumbered = 0;
  68
  69 /* Nonzero means suppress output of instruction numbers for previous
  70    and next insns in debugging dumps.
  71    This must be defined here so that programs like gencodes can be linked.  */
  72 int flag_dump_unnumbered_links = 0;
  73 #endif
  74
  75 /* Nonzero means use simplified format without flags, modes, etc.  */
  76 int flag_simple = 0;
  77
  78 #ifndef GENERATOR_FILE
  79 void
  80 print_mem_expr (FILE *outfile, const_tree expr)
  81 {
  82   fputc (' ', outfile);
  83   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  84 }
  85 #endif
  86
  87 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  88
  89 static void
  90 print_rtx (const_rtx in_rtx)
  91 {
  92   int i = 0;
  93   int j;
  94   const char *format_ptr;
  95   int is_insn;
  96
  97   if (sawclose)
  98     {
  99       if (flag_simple)
 100         fputc (' ', outfile);
 101       else
 102         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 103       sawclose = 0;
 104     }
 105
 106   if (in_rtx == 0)
 107     {
 108       fputs ("(nil)", outfile);
 109       sawclose = 1;
 110       return;
 111     }
 112   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 113     {
 114        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 115                 print_rtx_head, indent * 2, "");
 116        sawclose = 1;
 117        return;
 118     }
 119
 120   is_insn = INSN_P (in_rtx);
 121
 122   /* Print name of expression code.  */
 123   if (flag_simple && CONST_INT_P (in_rtx))
 124     fputc ('(', outfile);
 125   else
 126     fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 127
 128   if (! flag_simple)
 129     {
 130       if (RTX_FLAG (in_rtx, in_struct))
 131         fputs ("/s", outfile);
 132
 133       if (RTX_FLAG (in_rtx, volatil))
 134         fputs ("/v", outfile);
 135
 136       if (RTX_FLAG (in_rtx, unchanging))
 137         fputs ("/u", outfile);
 138
 139       if (RTX_FLAG (in_rtx, frame_related))
 140         fputs ("/f", outfile);
 141
 142       if (RTX_FLAG (in_rtx, jump))
 143         fputs ("/j", outfile);
 144
 145       if (RTX_FLAG (in_rtx, call))
 146         fputs ("/c", outfile);
 147
 148       if (RTX_FLAG (in_rtx, return_val))
 149         fputs ("/i", outfile);
 150
 151       /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 152       if ((GET_CODE (in_rtx) == EXPR_LIST
 153            || GET_CODE (in_rtx) == INSN_LIST)
 154           && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 155         fprintf (outfile, ":%s",
 156                  GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 157
 158       /* For other rtl, print the mode if it's not VOID.  */
 159       else if (GET_MODE (in_rtx) != VOIDmode)
 160         fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 161
 162 #ifndef GENERATOR_FILE
 163       if (GET_CODE (in_rtx) == VAR_LOCATION)
 164         {
 165           if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 166             fputs (" <debug string placeholder>", outfile);
 167           else
 168             print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 169           fputc (' ', outfile);
 170           print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 171           if (PAT_VAR_LOCATION_STATUS (in_rtx)
 172               == VAR_INIT_STATUS_UNINITIALIZED)
 173             fprintf (outfile, " [uninit]");
 174           sawclose = 1;
 175           i = GET_RTX_LENGTH (VAR_LOCATION);
 176         }
 177 #endif
 178     }
 179
 180 #ifndef GENERATOR_FILE
 181   if (CONST_DOUBLE_AS_FLOAT_P (in_rtx))
 182     i = 5;
 183 #endif
 184
 185   /* Get the format string and skip the first elements if we have handled
 186      them already.  */
 187   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 188   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 189     switch (*format_ptr++)
 190       {
 191         const char *str;
 192
 193       case 'T':
 194         str = XTMPL (in_rtx, i);
 195         goto string;
 196
 197       case 'S':
 198       case 's':
 199         str = XSTR (in_rtx, i);
 200       string:
 201
 202         if (str == 0)
 203           fputs (" \"\"", outfile);
 204         else
 205           fprintf (outfile, " (\"%s\")", str);
 206         sawclose = 1;
 207         break;
 208
 209         /* 0 indicates a field for internal use that should not be printed.
 210            An exception is the third field of a NOTE, where it indicates
 211            that the field has several different valid contents.  */
 212       case '0':
 213         if (i == 1 && REG_P (in_rtx))
 214           {
 215             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 216               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 217           }
 218 #ifndef GENERATOR_FILE
 219         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 220           {
 221             int flags = SYMBOL_REF_FLAGS (in_rtx);
 222             if (flags)
 223               fprintf (outfile, " [flags %#x]", flags);
 224           }
 225         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 226           {
 227             tree decl = SYMBOL_REF_DECL (in_rtx);
 228             if (decl)
 229               print_node_brief (outfile, "", decl, dump_flags);
 230           }
 231 #endif
 232         else if (i == 4 && NOTE_P (in_rtx))
 233           {
 234             switch (NOTE_KIND (in_rtx))
 235               {
 236               case NOTE_INSN_EH_REGION_BEG:
 237               case NOTE_INSN_EH_REGION_END:
 238                 if (flag_dump_unnumbered)
 239                   fprintf (outfile, " #");
 240                 else
 241                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 242                 sawclose = 1;
 243                 break;
 244
 245               case NOTE_INSN_BLOCK_BEG:
 246               case NOTE_INSN_BLOCK_END:
 247 #ifndef GENERATOR_FILE
 248                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 249 #endif
 250                 sawclose = 1;
 251                 break;
 252
 253               case NOTE_INSN_BASIC_BLOCK:
 254                 {
 255 #ifndef GENERATOR_FILE
 256                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 257                   if (bb != 0)
 258                     fprintf (outfile, " [bb %d]", bb->index);
 259 #endif
 260                   break;
 261                 }
 262
 263               case NOTE_INSN_DELETED_LABEL:
 264               case NOTE_INSN_DELETED_DEBUG_LABEL:
 265                 {
 266                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 267                   if (label)
 268                     fprintf (outfile, " (\"%s\")", label);
 269                   else
 270                     fprintf (outfile, " \"\"");
 271                 }
 272                 break;
 273
 274               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 275                 {
 276 #ifndef GENERATOR_FILE
 277                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 278                   if (bb != 0)
 279                     fprintf (outfile, " [bb %d]", bb->index);
 280 #endif
 281                   break;
 282                 }
 283
 284               case NOTE_INSN_VAR_LOCATION:
 285               case NOTE_INSN_CALL_ARG_LOCATION:
 286 #ifndef GENERATOR_FILE
 287                 fputc (' ', outfile);
 288                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 289 #endif
 290                 break;
 291
 292               case NOTE_INSN_CFI:
 293 #ifndef GENERATOR_FILE
 294                 fputc ('\n', outfile);
 295                 output_cfi_directive (outfile, NOTE_CFI (in_rtx));
 296                 fputc ('\t', outfile);
 297 #endif
 298                 break;
 299
 300               default:
 301                 break;
 302               }
 303           }
 304         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 305           {
 306             /* Output the JUMP_LABEL reference.  */
 307             fprintf (outfile, "\n%s%*s -> ", print_rtx_head, indent * 2, "");
 308             if (GET_CODE (JUMP_LABEL (in_rtx)) == RETURN)
 309               fprintf (outfile, "return");
 310             else if (GET_CODE (JUMP_LABEL (in_rtx)) == SIMPLE_RETURN)
 311               fprintf (outfile, "simple_return");
 312             else
 313               fprintf (outfile, "%d", INSN_UID (JUMP_LABEL (in_rtx)));
 314           }
 315         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 316           {
 317 #ifndef GENERATOR_FILE
 318             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 319
 320             fprintf (outfile, " %u:%u", val->uid, val->hash);
 321             dump_addr (outfile, " @", in_rtx);
 322             dump_addr (outfile, "/", (void*)val);
 323 #endif
 324           }
 325         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 326           {
 327 #ifndef GENERATOR_FILE
 328             fprintf (outfile, " D#%i",
 329                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 330 #endif
 331           }
 332         else if (i == 0 && GET_CODE (in_rtx) == ENTRY_VALUE)
 333           {
 334             indent += 2;
 335             if (!sawclose)
 336               fprintf (outfile, " ");
 337             print_rtx (ENTRY_VALUE_EXP (in_rtx));
 338             indent -= 2;
 339           }
 340         break;
 341
 342       case 'e':
 343       do_e:
 344         indent += 2;
 345         if (i == 7 && INSN_P (in_rtx))
 346           /* Put REG_NOTES on their own line.  */
 347           fprintf (outfile, "\n%s%*s",
 348                    print_rtx_head, indent * 2, "");
 349         if (!sawclose)
 350           fprintf (outfile, " ");
 351         print_rtx (XEXP (in_rtx, i));
 352         indent -= 2;
 353         break;
 354
 355       case 'E':
 356       case 'V':
 357         indent += 2;
 358         if (sawclose)
 359           {
 360             fprintf (outfile, "\n%s%*s",
 361                      print_rtx_head, indent * 2, "");
 362             sawclose = 0;
 363           }
 364         fputs (" [", outfile);
 365         if (NULL != XVEC (in_rtx, i))
 366           {
 367             indent += 2;
 368             if (XVECLEN (in_rtx, i))
 369               sawclose = 1;
 370
 371             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 372               print_rtx (XVECEXP (in_rtx, i, j));
 373
 374             indent -= 2;
 375           }
 376         if (sawclose)
 377           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 378
 379         fputs ("]", outfile);
 380         sawclose = 1;
 381         indent -= 2;
 382         break;
 383
 384       case 'w':
 385         if (! flag_simple)
 386           fprintf (outfile, " ");
 387         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 388         if (! flag_simple)
 389           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 390                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 391         break;
 392
 393       case 'i':
 394         if (i == 5 && INSN_P (in_rtx))
 395           {
 396 #ifndef GENERATOR_FILE
 397             /*  Pretty-print insn locations.  Ignore scoping as it is mostly
 398                 redundant with line number information and do not print anything
 399                 when there is no location information available.  */
 400             if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
 401               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 402 #endif
 403           }
 404         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 405           {
 406 #ifndef GENERATOR_FILE
 407             fprintf (outfile, " %s:%i",
 408                      LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 409                      LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 410 #endif
 411           }
 412         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 413           {
 414 #ifndef GENERATOR_FILE
 415             fprintf (outfile, " %s:%i",
 416                      LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 417                      LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 418 #endif
 419           }
 420         else if (i == 6 && NOTE_P (in_rtx))
 421           {
 422             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 423                other times often contains garbage from INSN->NOTE death.  */
 424             if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
 425                 || NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
 426               fprintf (outfile, " %d",  XINT (in_rtx, i));
 427           }
 428 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 429         else if (i == 1
 430                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 431                  && XINT (in_rtx, 1) >= 0
 432                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 433           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 434 #endif
 435 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 436         else if (i == 1
 437                  && (GET_CODE (in_rtx) == UNSPEC
 438                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 439                  && XINT (in_rtx, 1) >= 0
 440                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 441           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 442 #endif
 443         else
 444           {
 445             int value = XINT (in_rtx, i);
 446             const char *name;
 447
 448 #ifndef GENERATOR_FILE
 449             if (REG_P (in_rtx) && (unsigned) value < FIRST_PSEUDO_REGISTER)
 450               fprintf (outfile, " %d %s", value, reg_names[value]);
 451             else if (REG_P (in_rtx)
 452                      && (unsigned) value <= LAST_VIRTUAL_REGISTER)
 453               {
 454                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 455                   fprintf (outfile, " %d virtual-incoming-args", value);
 456                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 457                   fprintf (outfile, " %d virtual-stack-vars", value);
 458                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 459                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 460                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 461                   fprintf (outfile, " %d virtual-outgoing-args", value);
 462                 else if (value == VIRTUAL_CFA_REGNUM)
 463                   fprintf (outfile, " %d virtual-cfa", value);
 464                 else if (value == VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM)
 465                   fprintf (outfile, " %d virtual-preferred-stack-boundary",
 466                            value);
 467                 else
 468                   fprintf (outfile, " %d virtual-reg-%d", value,
 469                            value-FIRST_VIRTUAL_REGISTER);
 470               }
 471             else
 472 #endif
 473               if (flag_dump_unnumbered
 474                      && (is_insn || NOTE_P (in_rtx)))
 475               fputc ('#', outfile);
 476             else
 477               fprintf (outfile, " %d", value);
 478
 479 #ifndef GENERATOR_FILE
 480             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 481               {
 482                 fputs (" [", outfile);
 483                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 484                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 485                 if (REG_EXPR (in_rtx))
 486                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 487
 488                 if (REG_OFFSET (in_rtx))
 489                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 490                            REG_OFFSET (in_rtx));
 491                 fputs (" ]", outfile);
 492               }
 493 #endif
 494
 495             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 496                 && XINT (in_rtx, i) >= 0
 497                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 498               fprintf (outfile, " {%s}", name);
 499             sawclose = 0;
 500           }
 501         break;
 502
 503       /* Print NOTE_INSN names rather than integer codes.  */
 504
 505       case 'n':
 506         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 507         sawclose = 0;
 508         break;
 509
 510       case 'u':
 511         if (XEXP (in_rtx, i) != NULL)
 512           {
 513             rtx sub = XEXP (in_rtx, i);
 514             enum rtx_code subc = GET_CODE (sub);
 515
 516             if (GET_CODE (in_rtx) == LABEL_REF)
 517               {
 518                 if (subc == NOTE
 519                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 520                   {
 521                     if (flag_dump_unnumbered)
 522                       fprintf (outfile, " [# deleted]");
 523                     else
 524                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 525                     sawclose = 0;
 526                     break;
 527                   }
 528
 529                 if (subc != CODE_LABEL)
 530                   goto do_e;
 531               }
 532
 533             if (flag_dump_unnumbered
 534                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 535                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 536                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 537               fputs (" #", outfile);
 538             else
 539               fprintf (outfile, " %d", INSN_UID (sub));
 540           }
 541         else
 542           fputs (" 0", outfile);
 543         sawclose = 0;
 544         break;
 545
 546       case 't':
 547 #ifndef GENERATOR_FILE
 548         if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
 549           print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
 550         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_PARAMETER_REF)
 551           print_mem_expr (outfile, DEBUG_PARAMETER_REF_DECL (in_rtx));
 552         else
 553           dump_addr (outfile, " ", XTREE (in_rtx, i));
 554 #endif
 555         break;
 556
 557       case '*':
 558         fputs (" Unknown", outfile);
 559         sawclose = 0;
 560         break;
 561
 562       case 'B':
 563 #ifndef GENERATOR_FILE
 564         if (XBBDEF (in_rtx, i))
 565           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 566 #endif
 567         break;
 568
 569       default:
 570         gcc_unreachable ();
 571       }
 572
 573   switch (GET_CODE (in_rtx))
 574     {
 575 #ifndef GENERATOR_FILE
 576     case MEM:
 577       if (__builtin_expect (final_insns_dump_p, false))
 578         fprintf (outfile, " [");
 579       else
 580         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 581                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 582
 583       if (MEM_EXPR (in_rtx))
 584         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 585
 586       if (MEM_OFFSET_KNOWN_P (in_rtx))
 587         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC, MEM_OFFSET (in_rtx));
 588
 589       if (MEM_SIZE_KNOWN_P (in_rtx))
 590         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC, MEM_SIZE (in_rtx));
 591
 592       if (MEM_ALIGN (in_rtx) != 1)
 593         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 594
 595       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 596         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 597
 598       fputc (']', outfile);
 599       break;
 600
 601     case CONST_DOUBLE:
 602       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 603         {
 604           char s[60];
 605
 606           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 607                            sizeof (s), 0, 1);
 608           fprintf (outfile, " %s", s);
 609
 610           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 611                                sizeof (s), 0, 1);
 612           fprintf (outfile, " [%s]", s);
 613         }
 614       break;
 615 #endif
 616
 617     case CODE_LABEL:
 618       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 619       switch (LABEL_KIND (in_rtx))
 620         {
 621           case LABEL_NORMAL: break;
 622           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 623           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 624           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 625           default: gcc_unreachable ();
 626         }
 627       break;
 628
 629     default:
 630       break;
 631     }
 632
 633   fputc (')', outfile);
 634   sawclose = 1;
 635 }
 636
 637 /* Print an rtx on the current line of FILE.  Initially indent IND
 638    characters.  */
 639
 640 void
 641 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 642 {
 643   int oldsaw = sawclose;
 644   int oldindent = indent;
 645
 646   sawclose = 0;
 647   indent = ind;
 648   outfile = outf;
 649   print_rtx (x);
 650   sawclose = oldsaw;
 651   indent = oldindent;
 652 }
 653
 654 /* Call this function from the debugger to see what X looks like.  */
 655
 656 DEBUG_FUNCTION void
 657 debug_rtx (const_rtx x)
 658 {
 659   outfile = stderr;
 660   sawclose = 0;
 661   print_rtx (x);
 662   fprintf (stderr, "\n");
 663 }
 664
 665 /* Count of rtx's to print with debug_rtx_list.
 666    This global exists because gdb user defined commands have no arguments.  */
 667
 668 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 669
 670 /* Call this function to print list from X on.
 671
 672    N is a count of the rtx's to print. Positive values print from the specified
 673    rtx on.  Negative values print a window around the rtx.
 674    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 675
 676 DEBUG_FUNCTION void
 677 debug_rtx_list (const_rtx x, int n)
 678 {
 679   int i,count;
 680   const_rtx insn;
 681
 682   count = n == 0 ? 1 : n < 0 ? -n : n;
 683
 684   /* If we are printing a window, back up to the start.  */
 685
 686   if (n < 0)
 687     for (i = count / 2; i > 0; i--)
 688       {
 689         if (PREV_INSN (x) == 0)
 690           break;
 691         x = PREV_INSN (x);
 692       }
 693
 694   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 695     {
 696       debug_rtx (insn);
 697       fprintf (stderr, "\n");
 698     }
 699 }
 700
 701 /* Call this function to print an rtx list from START to END inclusive.  */
 702
 703 DEBUG_FUNCTION void
 704 debug_rtx_range (const_rtx start, const_rtx end)
 705 {
 706   while (1)
 707     {
 708       debug_rtx (start);
 709       fprintf (stderr, "\n");
 710       if (!start || start == end)
 711         break;
 712       start = NEXT_INSN (start);
 713     }
 714 }
 715
 716 /* Call this function to search an rtx list to find one with insn uid UID,
 717    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 718    The found insn is returned to enable further debugging analysis.  */
 719
 720 DEBUG_FUNCTION const_rtx
 721 debug_rtx_find (const_rtx x, int uid)
 722 {
 723   while (x != 0 && INSN_UID (x) != uid)
 724     x = NEXT_INSN (x);
 725   if (x != 0)
 726     {
 727       debug_rtx_list (x, debug_rtx_count);
 728       return x;
 729     }
 730   else
 731     {
 732       fprintf (stderr, "insn uid %d not found\n", uid);
 733       return 0;
 734     }
 735 }
 736
 737 /* External entry point for printing a chain of insns
 738    starting with RTX_FIRST onto file OUTF.
 739    A blank line separates insns.
 740
 741    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 742
 743 void
 744 print_rtl (FILE *outf, const_rtx rtx_first)
 745 {
 746   const_rtx tmp_rtx;
 747
 748   outfile = outf;
 749   sawclose = 0;
 750
 751   if (rtx_first == 0)
 752     {
 753       fputs (print_rtx_head, outf);
 754       fputs ("(nil)\n", outf);
 755     }
 756   else
 757     switch (GET_CODE (rtx_first))
 758       {
 759       case INSN:
 760       case JUMP_INSN:
 761       case CALL_INSN:
 762       case NOTE:
 763       case CODE_LABEL:
 764       case BARRIER:
 765         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 766           {
 767             fputs (print_rtx_head, outfile);
 768             print_rtx (tmp_rtx);
 769             fprintf (outfile, "\n");
 770           }
 771         break;
 772
 773       default:
 774         fputs (print_rtx_head, outfile);
 775         print_rtx (rtx_first);
 776       }
 777 }
 778
 779 /* Like print_rtx, except specify a file.  */
 780 /* Return nonzero if we actually printed anything.  */
 781
 782 int
 783 print_rtl_single (FILE *outf, const_rtx x)
 784 {
 785   return print_rtl_single_with_indent (outf, x, 0);
 786 }
 787
 788 /* Like print_rtl_single, except specify a file and indentation.  */
 789
 790 int
 791 print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
 792 {
 793   int old_indent = indent;
 794   char *s_indent = (char *) alloca ((size_t) ind + 1);
 795   memset ((void *) s_indent, ' ', (size_t) ind);
 796   s_indent[ind] = '\0';
 797
 798   indent = ind;
 799   outfile = outf;
 800   sawclose = 0;
 801   fputs (s_indent, outfile);
 802   fputs (print_rtx_head, outfile);
 803   print_rtx (x);
 804   putc ('\n', outf);
 805   indent = old_indent;
 806   return 1;
 807 }
 808
 809
 810 /* Like print_rtl except without all the detail; for example,
 811    if RTX is a CONST_INT then print in decimal format.  */
 812
 813 void
 814 print_simple_rtl (FILE *outf, const_rtx x)
 815 {
 816   flag_simple = 1;
 817   print_rtl (outf, x);
 818   flag_simple = 0;
 819 }