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 "print-tree.h"
  38 #include "flags.h"
  39 #include "hard-reg-set.h"
  40 #include "basic-block.h"
  41 #include "diagnostic.h"
  42 #include "tree-pretty-print.h"
  43 #include "cselib.h"
  44 #include "dumpfile.h"   /* for dump_flags */
  45 #include "dwarf2out.h"
  46 #endif
  47
  48 static FILE *outfile;
  49
  50 static int sawclose = 0;
  51
  52 static int indent;
  53
  54 static void print_rtx (const_rtx);
  55
  56 /* String printed at beginning of each RTL when it is dumped.
  57    This string is set to ASM_COMMENT_START when the RTL is dumped in
  58    the assembly output file.  */
  59 const char *print_rtx_head = "";
  60
  61 #ifdef GENERATOR_FILE
  62 /* These are defined from the .opt file when not used in generator
  63    programs.  */
  64
  65 /* Nonzero means suppress output of instruction numbers
  66    in debugging dumps.
  67    This must be defined here so that programs like gencodes can be linked.  */
  68 int flag_dump_unnumbered = 0;
  69
  70 /* Nonzero means suppress output of instruction numbers for previous
  71    and next insns in debugging dumps.
  72    This must be defined here so that programs like gencodes can be linked.  */
  73 int flag_dump_unnumbered_links = 0;
  74 #endif
  75
  76 /* Nonzero means use simplified format without flags, modes, etc.  */
  77 int flag_simple = 0;
  78
  79 #ifndef GENERATOR_FILE
  80 void
  81 print_mem_expr (FILE *outfile, const_tree expr)
  82 {
  83   fputc (' ', outfile);
  84   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  85 }
  86 #endif
  87
  88 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  89
  90 static void
  91 print_rtx (const_rtx in_rtx)
  92 {
  93   int i = 0;
  94   int j;
  95   const char *format_ptr;
  96   int is_insn;
  97
  98   if (sawclose)
  99     {
 100       if (flag_simple)
 101         fputc (' ', outfile);
 102       else
 103         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 104       sawclose = 0;
 105     }
 106
 107   if (in_rtx == 0)
 108     {
 109       fputs ("(nil)", outfile);
 110       sawclose = 1;
 111       return;
 112     }
 113   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 114     {
 115        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 116                 print_rtx_head, indent * 2, "");
 117        sawclose = 1;
 118        return;
 119     }
 120
 121   is_insn = INSN_P (in_rtx);
 122
 123   /* Print name of expression code.  */
 124   if (flag_simple && CONST_INT_P (in_rtx))
 125     fputc ('(', outfile);
 126   else
 127     fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 128
 129   if (! flag_simple)
 130     {
 131       if (RTX_FLAG (in_rtx, in_struct))
 132         fputs ("/s", outfile);
 133
 134       if (RTX_FLAG (in_rtx, volatil))
 135         fputs ("/v", outfile);
 136
 137       if (RTX_FLAG (in_rtx, unchanging))
 138         fputs ("/u", outfile);
 139
 140       if (RTX_FLAG (in_rtx, frame_related))
 141         fputs ("/f", outfile);
 142
 143       if (RTX_FLAG (in_rtx, jump))
 144         fputs ("/j", outfile);
 145
 146       if (RTX_FLAG (in_rtx, call))
 147         fputs ("/c", outfile);
 148
 149       if (RTX_FLAG (in_rtx, return_val))
 150         fputs ("/i", outfile);
 151
 152       /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 153       if ((GET_CODE (in_rtx) == EXPR_LIST
 154            || GET_CODE (in_rtx) == INSN_LIST
 155            || GET_CODE (in_rtx) == INT_LIST)
 156           && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 157         fprintf (outfile, ":%s",
 158                  GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 159
 160       /* For other rtl, print the mode if it's not VOID.  */
 161       else if (GET_MODE (in_rtx) != VOIDmode)
 162         fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 163
 164 #ifndef GENERATOR_FILE
 165       if (GET_CODE (in_rtx) == VAR_LOCATION)
 166         {
 167           if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 168             fputs (" <debug string placeholder>", outfile);
 169           else
 170             print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 171           fputc (' ', outfile);
 172           print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 173           if (PAT_VAR_LOCATION_STATUS (in_rtx)
 174               == VAR_INIT_STATUS_UNINITIALIZED)
 175             fprintf (outfile, " [uninit]");
 176           sawclose = 1;
 177           i = GET_RTX_LENGTH (VAR_LOCATION);
 178         }
 179 #endif
 180     }
 181
 182 #ifndef GENERATOR_FILE
 183   if (CONST_DOUBLE_AS_FLOAT_P (in_rtx))
 184     i = 5;
 185 #endif
 186
 187   /* Get the format string and skip the first elements if we have handled
 188      them already.  */
 189   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 190   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 191     switch (*format_ptr++)
 192       {
 193         const char *str;
 194
 195       case 'T':
 196         str = XTMPL (in_rtx, i);
 197         goto string;
 198
 199       case 'S':
 200       case 's':
 201         str = XSTR (in_rtx, i);
 202       string:
 203
 204         if (str == 0)
 205           fputs (" \"\"", outfile);
 206         else
 207           fprintf (outfile, " (\"%s\")", str);
 208         sawclose = 1;
 209         break;
 210
 211         /* 0 indicates a field for internal use that should not be printed.
 212            An exception is the third field of a NOTE, where it indicates
 213            that the field has several different valid contents.  */
 214       case '0':
 215         if (i == 1 && REG_P (in_rtx))
 216           {
 217             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 218               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 219           }
 220 #ifndef GENERATOR_FILE
 221         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 222           {
 223             int flags = SYMBOL_REF_FLAGS (in_rtx);
 224             if (flags)
 225               fprintf (outfile, " [flags %#x]", flags);
 226           }
 227         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 228           {
 229             tree decl = SYMBOL_REF_DECL (in_rtx);
 230             if (decl)
 231               print_node_brief (outfile, "", decl, dump_flags);
 232           }
 233 #endif
 234         else if (i == 4 && NOTE_P (in_rtx))
 235           {
 236             switch (NOTE_KIND (in_rtx))
 237               {
 238               case NOTE_INSN_EH_REGION_BEG:
 239               case NOTE_INSN_EH_REGION_END:
 240                 if (flag_dump_unnumbered)
 241                   fprintf (outfile, " #");
 242                 else
 243                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 244                 sawclose = 1;
 245                 break;
 246
 247               case NOTE_INSN_BLOCK_BEG:
 248               case NOTE_INSN_BLOCK_END:
 249 #ifndef GENERATOR_FILE
 250                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 251 #endif
 252                 sawclose = 1;
 253                 break;
 254
 255               case NOTE_INSN_BASIC_BLOCK:
 256                 {
 257 #ifndef GENERATOR_FILE
 258                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 259                   if (bb != 0)
 260                     fprintf (outfile, " [bb %d]", bb->index);
 261 #endif
 262                   break;
 263                 }
 264
 265               case NOTE_INSN_DELETED_LABEL:
 266               case NOTE_INSN_DELETED_DEBUG_LABEL:
 267                 {
 268                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 269                   if (label)
 270                     fprintf (outfile, " (\"%s\")", label);
 271                   else
 272                     fprintf (outfile, " \"\"");
 273                 }
 274                 break;
 275
 276               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 277                 {
 278 #ifndef GENERATOR_FILE
 279                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 280                   if (bb != 0)
 281                     fprintf (outfile, " [bb %d]", bb->index);
 282 #endif
 283                   break;
 284                 }
 285
 286               case NOTE_INSN_VAR_LOCATION:
 287               case NOTE_INSN_CALL_ARG_LOCATION:
 288 #ifndef GENERATOR_FILE
 289                 fputc (' ', outfile);
 290                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 291 #endif
 292                 break;
 293
 294               case NOTE_INSN_CFI:
 295 #ifndef GENERATOR_FILE
 296                 fputc ('\n', outfile);
 297                 output_cfi_directive (outfile, NOTE_CFI (in_rtx));
 298                 fputc ('\t', outfile);
 299 #endif
 300                 break;
 301
 302               default:
 303                 break;
 304               }
 305           }
 306         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 307           {
 308             /* Output the JUMP_LABEL reference.  */
 309             fprintf (outfile, "\n%s%*s -> ", print_rtx_head, indent * 2, "");
 310             if (GET_CODE (JUMP_LABEL (in_rtx)) == RETURN)
 311               fprintf (outfile, "return");
 312             else if (GET_CODE (JUMP_LABEL (in_rtx)) == SIMPLE_RETURN)
 313               fprintf (outfile, "simple_return");
 314             else
 315               fprintf (outfile, "%d", INSN_UID (JUMP_LABEL (in_rtx)));
 316           }
 317         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 318           {
 319 #ifndef GENERATOR_FILE
 320             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 321
 322             fprintf (outfile, " %u:%u", val->uid, val->hash);
 323             dump_addr (outfile, " @", in_rtx);
 324             dump_addr (outfile, "/", (void*)val);
 325 #endif
 326           }
 327         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 328           {
 329 #ifndef GENERATOR_FILE
 330             fprintf (outfile, " D#%i",
 331                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 332 #endif
 333           }
 334         else if (i == 0 && GET_CODE (in_rtx) == ENTRY_VALUE)
 335           {
 336             indent += 2;
 337             if (!sawclose)
 338               fprintf (outfile, " ");
 339             print_rtx (ENTRY_VALUE_EXP (in_rtx));
 340             indent -= 2;
 341           }
 342         break;
 343
 344       case 'e':
 345       do_e:
 346         indent += 2;
 347         if (i == 7 && INSN_P (in_rtx))
 348           /* Put REG_NOTES on their own line.  */
 349           fprintf (outfile, "\n%s%*s",
 350                    print_rtx_head, indent * 2, "");
 351         if (!sawclose)
 352           fprintf (outfile, " ");
 353         print_rtx (XEXP (in_rtx, i));
 354         indent -= 2;
 355         break;
 356
 357       case 'E':
 358       case 'V':
 359         indent += 2;
 360         if (sawclose)
 361           {
 362             fprintf (outfile, "\n%s%*s",
 363                      print_rtx_head, indent * 2, "");
 364             sawclose = 0;
 365           }
 366         fputs (" [", outfile);
 367         if (NULL != XVEC (in_rtx, i))
 368           {
 369             indent += 2;
 370             if (XVECLEN (in_rtx, i))
 371               sawclose = 1;
 372
 373             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 374               print_rtx (XVECEXP (in_rtx, i, j));
 375
 376             indent -= 2;
 377           }
 378         if (sawclose)
 379           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 380
 381         fputs ("]", outfile);
 382         sawclose = 1;
 383         indent -= 2;
 384         break;
 385
 386       case 'w':
 387         if (! flag_simple)
 388           fprintf (outfile, " ");
 389         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 390         if (! flag_simple)
 391           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 392                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 393         break;
 394
 395       case 'i':
 396         if (i == 5 && INSN_P (in_rtx))
 397           {
 398 #ifndef GENERATOR_FILE
 399             /*  Pretty-print insn locations.  Ignore scoping as it is mostly
 400                 redundant with line number information and do not print anything
 401                 when there is no location information available.  */
 402             if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
 403               fprintf (outfile, " %s:%i", insn_file (in_rtx),
 404                        insn_line (in_rtx));
 405 #endif
 406           }
 407         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 408           {
 409 #ifndef GENERATOR_FILE
 410             fprintf (outfile, " %s:%i",
 411                      LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 412                      LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 413 #endif
 414           }
 415         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 416           {
 417 #ifndef GENERATOR_FILE
 418             fprintf (outfile, " %s:%i",
 419                      LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 420                      LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 421 #endif
 422           }
 423         else if (i == 6 && NOTE_P (in_rtx))
 424           {
 425             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 426                other times often contains garbage from INSN->NOTE death.  */
 427             if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
 428                 || NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
 429               fprintf (outfile, " %d",  XINT (in_rtx, i));
 430           }
 431 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 432         else if (i == 1
 433                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 434                  && XINT (in_rtx, 1) >= 0
 435                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 436           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 437 #endif
 438 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 439         else if (i == 1
 440                  && (GET_CODE (in_rtx) == UNSPEC
 441                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 442                  && XINT (in_rtx, 1) >= 0
 443                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 444           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 445 #endif
 446         else
 447           {
 448             int value = XINT (in_rtx, i);
 449             const char *name;
 450
 451 #ifndef GENERATOR_FILE
 452             if (REG_P (in_rtx) && (unsigned) value < FIRST_PSEUDO_REGISTER)
 453               fprintf (outfile, " %d %s", value, reg_names[value]);
 454             else if (REG_P (in_rtx)
 455                      && (unsigned) value <= LAST_VIRTUAL_REGISTER)
 456               {
 457                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 458                   fprintf (outfile, " %d virtual-incoming-args", value);
 459                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 460                   fprintf (outfile, " %d virtual-stack-vars", value);
 461                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 462                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 463                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 464                   fprintf (outfile, " %d virtual-outgoing-args", value);
 465                 else if (value == VIRTUAL_CFA_REGNUM)
 466                   fprintf (outfile, " %d virtual-cfa", value);
 467                 else if (value == VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM)
 468                   fprintf (outfile, " %d virtual-preferred-stack-boundary",
 469                            value);
 470                 else
 471                   fprintf (outfile, " %d virtual-reg-%d", value,
 472                            value-FIRST_VIRTUAL_REGISTER);
 473               }
 474             else
 475 #endif
 476               if (flag_dump_unnumbered
 477                      && (is_insn || NOTE_P (in_rtx)))
 478               fputc ('#', outfile);
 479             else
 480               fprintf (outfile, " %d", value);
 481
 482 #ifndef GENERATOR_FILE
 483             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 484               {
 485                 fputs (" [", outfile);
 486                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 487                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 488                 if (REG_EXPR (in_rtx))
 489                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 490
 491                 if (REG_OFFSET (in_rtx))
 492                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 493                            REG_OFFSET (in_rtx));
 494                 fputs (" ]", outfile);
 495               }
 496 #endif
 497
 498             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 499                 && XINT (in_rtx, i) >= 0
 500                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 501               fprintf (outfile, " {%s}", name);
 502             sawclose = 0;
 503           }
 504         break;
 505
 506       /* Print NOTE_INSN names rather than integer codes.  */
 507
 508       case 'n':
 509         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 510         sawclose = 0;
 511         break;
 512
 513       case 'u':
 514         if (XEXP (in_rtx, i) != NULL)
 515           {
 516             rtx sub = XEXP (in_rtx, i);
 517             enum rtx_code subc = GET_CODE (sub);
 518
 519             if (GET_CODE (in_rtx) == LABEL_REF)
 520               {
 521                 if (subc == NOTE
 522                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 523                   {
 524                     if (flag_dump_unnumbered)
 525                       fprintf (outfile, " [# deleted]");
 526                     else
 527                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 528                     sawclose = 0;
 529                     break;
 530                   }
 531
 532                 if (subc != CODE_LABEL)
 533                   goto do_e;
 534               }
 535
 536             if (flag_dump_unnumbered
 537                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 538                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 539                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 540               fputs (" #", outfile);
 541             else
 542               fprintf (outfile, " %d", INSN_UID (sub));
 543           }
 544         else
 545           fputs (" 0", outfile);
 546         sawclose = 0;
 547         break;
 548
 549       case 't':
 550 #ifndef GENERATOR_FILE
 551         if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
 552           print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
 553         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_PARAMETER_REF)
 554           print_mem_expr (outfile, DEBUG_PARAMETER_REF_DECL (in_rtx));
 555         else
 556           dump_addr (outfile, " ", XTREE (in_rtx, i));
 557 #endif
 558         break;
 559
 560       case '*':
 561         fputs (" Unknown", outfile);
 562         sawclose = 0;
 563         break;
 564
 565       case 'B':
 566 #ifndef GENERATOR_FILE
 567         if (XBBDEF (in_rtx, i))
 568           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 569 #endif
 570         break;
 571
 572       default:
 573         gcc_unreachable ();
 574       }
 575
 576   switch (GET_CODE (in_rtx))
 577     {
 578 #ifndef GENERATOR_FILE
 579     case MEM:
 580       if (__builtin_expect (final_insns_dump_p, false))
 581         fprintf (outfile, " [");
 582       else
 583         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 584                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 585
 586       if (MEM_EXPR (in_rtx))
 587         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 588
 589       if (MEM_OFFSET_KNOWN_P (in_rtx))
 590         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC, MEM_OFFSET (in_rtx));
 591
 592       if (MEM_SIZE_KNOWN_P (in_rtx))
 593         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC, MEM_SIZE (in_rtx));
 594
 595       if (MEM_ALIGN (in_rtx) != 1)
 596         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 597
 598       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 599         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 600
 601       fputc (']', outfile);
 602       break;
 603
 604     case CONST_DOUBLE:
 605       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 606         {
 607           char s[60];
 608
 609           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 610                            sizeof (s), 0, 1);
 611           fprintf (outfile, " %s", s);
 612
 613           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 614                                sizeof (s), 0, 1);
 615           fprintf (outfile, " [%s]", s);
 616         }
 617       break;
 618 #endif
 619
 620     case CODE_LABEL:
 621       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 622       switch (LABEL_KIND (in_rtx))
 623         {
 624           case LABEL_NORMAL: break;
 625           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 626           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 627           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 628           default: gcc_unreachable ();
 629         }
 630       break;
 631
 632     default:
 633       break;
 634     }
 635
 636   fputc (')', outfile);
 637   sawclose = 1;
 638 }
 639
 640 /* Print an rtx on the current line of FILE.  Initially indent IND
 641    characters.  */
 642
 643 void
 644 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 645 {
 646   int oldsaw = sawclose;
 647   int oldindent = indent;
 648
 649   sawclose = 0;
 650   indent = ind;
 651   outfile = outf;
 652   print_rtx (x);
 653   sawclose = oldsaw;
 654   indent = oldindent;
 655 }
 656
 657 /* Call this function from the debugger to see what X looks like.  */
 658
 659 DEBUG_FUNCTION void
 660 debug_rtx (const_rtx x)
 661 {
 662   outfile = stderr;
 663   sawclose = 0;
 664   print_rtx (x);
 665   fprintf (stderr, "\n");
 666 }
 667
 668 /* Dump rtx REF.  */
 669
 670 DEBUG_FUNCTION void
 671 debug (const rtx_def &ref)
 672 {
 673   debug_rtx (&ref);
 674 }
 675
 676 DEBUG_FUNCTION void
 677 debug (const rtx_def *ptr)
 678 {
 679   if (ptr)
 680     debug (*ptr);
 681   else
 682     fprintf (stderr, "<nil>\n");
 683 }
 684
 685 /* Count of rtx's to print with debug_rtx_list.
 686    This global exists because gdb user defined commands have no arguments.  */
 687
 688 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 689
 690 /* Call this function to print list from X on.
 691
 692    N is a count of the rtx's to print. Positive values print from the specified
 693    rtx on.  Negative values print a window around the rtx.
 694    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 695
 696 DEBUG_FUNCTION void
 697 debug_rtx_list (const_rtx x, int n)
 698 {
 699   int i,count;
 700   const_rtx insn;
 701
 702   count = n == 0 ? 1 : n < 0 ? -n : n;
 703
 704   /* If we are printing a window, back up to the start.  */
 705
 706   if (n < 0)
 707     for (i = count / 2; i > 0; i--)
 708       {
 709         if (PREV_INSN (x) == 0)
 710           break;
 711         x = PREV_INSN (x);
 712       }
 713
 714   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 715     {
 716       debug_rtx (insn);
 717       fprintf (stderr, "\n");
 718     }
 719 }
 720
 721 /* Call this function to print an rtx list from START to END inclusive.  */
 722
 723 DEBUG_FUNCTION void
 724 debug_rtx_range (const_rtx start, const_rtx end)
 725 {
 726   while (1)
 727     {
 728       debug_rtx (start);
 729       fprintf (stderr, "\n");
 730       if (!start || start == end)
 731         break;
 732       start = NEXT_INSN (start);
 733     }
 734 }
 735
 736 /* Call this function to search an rtx list to find one with insn uid UID,
 737    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 738    The found insn is returned to enable further debugging analysis.  */
 739
 740 DEBUG_FUNCTION const_rtx
 741 debug_rtx_find (const_rtx x, int uid)
 742 {
 743   while (x != 0 && INSN_UID (x) != uid)
 744     x = NEXT_INSN (x);
 745   if (x != 0)
 746     {
 747       debug_rtx_list (x, debug_rtx_count);
 748       return x;
 749     }
 750   else
 751     {
 752       fprintf (stderr, "insn uid %d not found\n", uid);
 753       return 0;
 754     }
 755 }
 756
 757 /* External entry point for printing a chain of insns
 758    starting with RTX_FIRST onto file OUTF.
 759    A blank line separates insns.
 760
 761    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 762
 763 void
 764 print_rtl (FILE *outf, const_rtx rtx_first)
 765 {
 766   const_rtx tmp_rtx;
 767
 768   outfile = outf;
 769   sawclose = 0;
 770
 771   if (rtx_first == 0)
 772     {
 773       fputs (print_rtx_head, outf);
 774       fputs ("(nil)\n", outf);
 775     }
 776   else
 777     switch (GET_CODE (rtx_first))
 778       {
 779       case INSN:
 780       case JUMP_INSN:
 781       case CALL_INSN:
 782       case NOTE:
 783       case CODE_LABEL:
 784       case JUMP_TABLE_DATA:
 785       case BARRIER:
 786         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 787           {
 788             fputs (print_rtx_head, outfile);
 789             print_rtx (tmp_rtx);
 790             fprintf (outfile, "\n");
 791           }
 792         break;
 793
 794       default:
 795         fputs (print_rtx_head, outfile);
 796         print_rtx (rtx_first);
 797       }
 798 }
 799
 800 /* Like print_rtx, except specify a file.  */
 801 /* Return nonzero if we actually printed anything.  */
 802
 803 int
 804 print_rtl_single (FILE *outf, const_rtx x)
 805 {
 806   return print_rtl_single_with_indent (outf, x, 0);
 807 }
 808
 809 /* Like print_rtl_single, except specify a file and indentation.  */
 810
 811 int
 812 print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
 813 {
 814   int old_indent = indent;
 815   char *s_indent = (char *) alloca ((size_t) ind + 1);
 816   memset ((void *) s_indent, ' ', (size_t) ind);
 817   s_indent[ind] = '\0';
 818
 819   indent = ind;
 820   outfile = outf;
 821   sawclose = 0;
 822   fputs (s_indent, outfile);
 823   fputs (print_rtx_head, outfile);
 824   print_rtx (x);
 825   putc ('\n', outf);
 826   indent = old_indent;
 827   return 1;
 828 }
 829
 830
 831 /* Like print_rtl except without all the detail; for example,
 832    if RTX is a CONST_INT then print in decimal format.  */
 833
 834 void
 835 print_simple_rtl (FILE *outf, const_rtx x)
 836 {
 837   flag_simple = 1;
 838   print_rtl (outf, x);
 839   flag_simple = 0;
 840 }