gcc/print-rtl.c

   1 /* Print RTL for GCC.
   2    Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000, 2002, 2003,
   3    2004, 2005, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 /* This file is compiled twice: once for the generator programs,
  23    once for the compiler.  */
  24 #ifdef GENERATOR_FILE
  25 #include "bconfig.h"
  26 #else
  27 #include "config.h"
  28 #endif
  29
  30 #include "system.h"
  31 #include "coretypes.h"
  32 #include "tm.h"
  33 #include "rtl.h"
  34
  35 /* These headers all define things which are not available in
  36    generator programs.  */
  37 #ifndef GENERATOR_FILE
  38 #include "tree.h"
  39 #include "flags.h"
  40 #include "hard-reg-set.h"
  41 #include "basic-block.h"
  42 #include "diagnostic.h"
  43 #include "tree-pretty-print.h"
  44 #include "cselib.h"
  45 #include "dumpfile.h"   /* for dump_flags */
  46 #include "dwarf2out.h"
  47 #endif
  48
  49 static FILE *outfile;
  50
  51 static int sawclose = 0;
  52
  53 static int indent;
  54
  55 static void print_rtx (const_rtx);
  56
  57 /* String printed at beginning of each RTL when it is dumped.
  58    This string is set to ASM_COMMENT_START when the RTL is dumped in
  59    the assembly output file.  */
  60 const char *print_rtx_head = "";
  61
  62 #ifdef GENERATOR_FILE
  63 /* These are defined from the .opt file when not used in generator
  64    programs.  */
  65
  66 /* Nonzero means suppress output of instruction numbers
  67    in debugging dumps.
  68    This must be defined here so that programs like gencodes can be linked.  */
  69 int flag_dump_unnumbered = 0;
  70
  71 /* Nonzero means suppress output of instruction numbers for previous
  72    and next insns in debugging dumps.
  73    This must be defined here so that programs like gencodes can be linked.  */
  74 int flag_dump_unnumbered_links = 0;
  75 #endif
  76
  77 /* Nonzero means use simplified format without flags, modes, etc.  */
  78 int flag_simple = 0;
  79
  80 #ifndef GENERATOR_FILE
  81 void
  82 print_mem_expr (FILE *outfile, const_tree expr)
  83 {
  84   fputc (' ', outfile);
  85   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  86 }
  87 #endif
  88
  89 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  90
  91 static void
  92 print_rtx (const_rtx in_rtx)
  93 {
  94   int i = 0;
  95   int j;
  96   const char *format_ptr;
  97   int is_insn;
  98
  99   if (sawclose)
 100     {
 101       if (flag_simple)
 102         fputc (' ', outfile);
 103       else
 104         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 105       sawclose = 0;
 106     }
 107
 108   if (in_rtx == 0)
 109     {
 110       fputs ("(nil)", outfile);
 111       sawclose = 1;
 112       return;
 113     }
 114   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 115     {
 116        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 117                 print_rtx_head, indent * 2, "");
 118        sawclose = 1;
 119        return;
 120     }
 121
 122   is_insn = INSN_P (in_rtx);
 123
 124   /* Print name of expression code.  */
 125   if (flag_simple && CONST_INT_P (in_rtx))
 126     fputc ('(', outfile);
 127   else
 128     fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 129
 130   if (! flag_simple)
 131     {
 132       if (RTX_FLAG (in_rtx, in_struct))
 133         fputs ("/s", outfile);
 134
 135       if (RTX_FLAG (in_rtx, volatil))
 136         fputs ("/v", outfile);
 137
 138       if (RTX_FLAG (in_rtx, unchanging))
 139         fputs ("/u", outfile);
 140
 141       if (RTX_FLAG (in_rtx, frame_related))
 142         fputs ("/f", outfile);
 143
 144       if (RTX_FLAG (in_rtx, jump))
 145         fputs ("/j", outfile);
 146
 147       if (RTX_FLAG (in_rtx, call))
 148         fputs ("/c", outfile);
 149
 150       if (RTX_FLAG (in_rtx, return_val))
 151         fputs ("/i", outfile);
 152
 153       /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 154       if ((GET_CODE (in_rtx) == EXPR_LIST
 155            || GET_CODE (in_rtx) == INSN_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), insn_line (in_rtx));
 404 #endif
 405           }
 406         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 407           {
 408 #ifndef GENERATOR_FILE
 409             fprintf (outfile, " %s:%i",
 410                      LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 411                      LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 412 #endif
 413           }
 414         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 415           {
 416 #ifndef GENERATOR_FILE
 417             fprintf (outfile, " %s:%i",
 418                      LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 419                      LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 420 #endif
 421           }
 422         else if (i == 6 && NOTE_P (in_rtx))
 423           {
 424             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 425                other times often contains garbage from INSN->NOTE death.  */
 426             if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
 427                 || NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
 428               fprintf (outfile, " %d",  XINT (in_rtx, i));
 429           }
 430 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 431         else if (i == 1
 432                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 433                  && XINT (in_rtx, 1) >= 0
 434                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 435           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 436 #endif
 437 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 438         else if (i == 1
 439                  && (GET_CODE (in_rtx) == UNSPEC
 440                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 441                  && XINT (in_rtx, 1) >= 0
 442                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 443           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 444 #endif
 445         else
 446           {
 447             int value = XINT (in_rtx, i);
 448             const char *name;
 449
 450 #ifndef GENERATOR_FILE
 451             if (REG_P (in_rtx) && (unsigned) value < FIRST_PSEUDO_REGISTER)
 452               fprintf (outfile, " %d %s", value, reg_names[value]);
 453             else if (REG_P (in_rtx)
 454                      && (unsigned) value <= LAST_VIRTUAL_REGISTER)
 455               {
 456                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 457                   fprintf (outfile, " %d virtual-incoming-args", value);
 458                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 459                   fprintf (outfile, " %d virtual-stack-vars", value);
 460                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 461                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 462                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 463                   fprintf (outfile, " %d virtual-outgoing-args", value);
 464                 else if (value == VIRTUAL_CFA_REGNUM)
 465                   fprintf (outfile, " %d virtual-cfa", value);
 466                 else if (value == VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM)
 467                   fprintf (outfile, " %d virtual-preferred-stack-boundary",
 468                            value);
 469                 else
 470                   fprintf (outfile, " %d virtual-reg-%d", value,
 471                            value-FIRST_VIRTUAL_REGISTER);
 472               }
 473             else
 474 #endif
 475               if (flag_dump_unnumbered
 476                      && (is_insn || NOTE_P (in_rtx)))
 477               fputc ('#', outfile);
 478             else
 479               fprintf (outfile, " %d", value);
 480
 481 #ifndef GENERATOR_FILE
 482             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 483               {
 484                 fputs (" [", outfile);
 485                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 486                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 487                 if (REG_EXPR (in_rtx))
 488                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 489
 490                 if (REG_OFFSET (in_rtx))
 491                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 492                            REG_OFFSET (in_rtx));
 493                 fputs (" ]", outfile);
 494               }
 495 #endif
 496
 497             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 498                 && XINT (in_rtx, i) >= 0
 499                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 500               fprintf (outfile, " {%s}", name);
 501             sawclose = 0;
 502           }
 503         break;
 504
 505       /* Print NOTE_INSN names rather than integer codes.  */
 506
 507       case 'n':
 508         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 509         sawclose = 0;
 510         break;
 511
 512       case 'u':
 513         if (XEXP (in_rtx, i) != NULL)
 514           {
 515             rtx sub = XEXP (in_rtx, i);
 516             enum rtx_code subc = GET_CODE (sub);
 517
 518             if (GET_CODE (in_rtx) == LABEL_REF)
 519               {
 520                 if (subc == NOTE
 521                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 522                   {
 523                     if (flag_dump_unnumbered)
 524                       fprintf (outfile, " [# deleted]");
 525                     else
 526                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 527                     sawclose = 0;
 528                     break;
 529                   }
 530
 531                 if (subc != CODE_LABEL)
 532                   goto do_e;
 533               }
 534
 535             if (flag_dump_unnumbered
 536                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 537                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 538                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 539               fputs (" #", outfile);
 540             else
 541               fprintf (outfile, " %d", INSN_UID (sub));
 542           }
 543         else
 544           fputs (" 0", outfile);
 545         sawclose = 0;
 546         break;
 547
 548       case 't':
 549 #ifndef GENERATOR_FILE
 550         if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
 551           print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
 552         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_PARAMETER_REF)
 553           print_mem_expr (outfile, DEBUG_PARAMETER_REF_DECL (in_rtx));
 554         else
 555           dump_addr (outfile, " ", XTREE (in_rtx, i));
 556 #endif
 557         break;
 558
 559       case '*':
 560         fputs (" Unknown", outfile);
 561         sawclose = 0;
 562         break;
 563
 564       case 'B':
 565 #ifndef GENERATOR_FILE
 566         if (XBBDEF (in_rtx, i))
 567           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 568 #endif
 569         break;
 570
 571       default:
 572         gcc_unreachable ();
 573       }
 574
 575   switch (GET_CODE (in_rtx))
 576     {
 577 #ifndef GENERATOR_FILE
 578     case MEM:
 579       if (__builtin_expect (final_insns_dump_p, false))
 580         fprintf (outfile, " [");
 581       else
 582         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 583                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 584
 585       if (MEM_EXPR (in_rtx))
 586         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 587
 588       if (MEM_OFFSET_KNOWN_P (in_rtx))
 589         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC, MEM_OFFSET (in_rtx));
 590
 591       if (MEM_SIZE_KNOWN_P (in_rtx))
 592         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC, MEM_SIZE (in_rtx));
 593
 594       if (MEM_ALIGN (in_rtx) != 1)
 595         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 596
 597       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 598         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 599
 600       fputc (']', outfile);
 601       break;
 602
 603     case CONST_DOUBLE:
 604       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 605         {
 606           char s[60];
 607
 608           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 609                            sizeof (s), 0, 1);
 610           fprintf (outfile, " %s", s);
 611
 612           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 613                                sizeof (s), 0, 1);
 614           fprintf (outfile, " [%s]", s);
 615         }
 616       break;
 617 #endif
 618
 619     case CODE_LABEL:
 620       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 621       switch (LABEL_KIND (in_rtx))
 622         {
 623           case LABEL_NORMAL: break;
 624           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 625           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 626           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 627           default: gcc_unreachable ();
 628         }
 629       break;
 630
 631     default:
 632       break;
 633     }
 634
 635   fputc (')', outfile);
 636   sawclose = 1;
 637 }
 638
 639 /* Print an rtx on the current line of FILE.  Initially indent IND
 640    characters.  */
 641
 642 void
 643 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 644 {
 645   int oldsaw = sawclose;
 646   int oldindent = indent;
 647
 648   sawclose = 0;
 649   indent = ind;
 650   outfile = outf;
 651   print_rtx (x);
 652   sawclose = oldsaw;
 653   indent = oldindent;
 654 }
 655
 656 /* Call this function from the debugger to see what X looks like.  */
 657
 658 DEBUG_FUNCTION void
 659 debug_rtx (const_rtx x)
 660 {
 661   outfile = stderr;
 662   sawclose = 0;
 663   print_rtx (x);
 664   fprintf (stderr, "\n");
 665 }
 666
 667 /* Count of rtx's to print with debug_rtx_list.
 668    This global exists because gdb user defined commands have no arguments.  */
 669
 670 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 671
 672 /* Call this function to print list from X on.
 673
 674    N is a count of the rtx's to print. Positive values print from the specified
 675    rtx on.  Negative values print a window around the rtx.
 676    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 677
 678 DEBUG_FUNCTION void
 679 debug_rtx_list (const_rtx x, int n)
 680 {
 681   int i,count;
 682   const_rtx insn;
 683
 684   count = n == 0 ? 1 : n < 0 ? -n : n;
 685
 686   /* If we are printing a window, back up to the start.  */
 687
 688   if (n < 0)
 689     for (i = count / 2; i > 0; i--)
 690       {
 691         if (PREV_INSN (x) == 0)
 692           break;
 693         x = PREV_INSN (x);
 694       }
 695
 696   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 697     {
 698       debug_rtx (insn);
 699       fprintf (stderr, "\n");
 700     }
 701 }
 702
 703 /* Call this function to print an rtx list from START to END inclusive.  */
 704
 705 DEBUG_FUNCTION void
 706 debug_rtx_range (const_rtx start, const_rtx end)
 707 {
 708   while (1)
 709     {
 710       debug_rtx (start);
 711       fprintf (stderr, "\n");
 712       if (!start || start == end)
 713         break;
 714       start = NEXT_INSN (start);
 715     }
 716 }
 717
 718 /* Call this function to search an rtx list to find one with insn uid UID,
 719    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 720    The found insn is returned to enable further debugging analysis.  */
 721
 722 DEBUG_FUNCTION const_rtx
 723 debug_rtx_find (const_rtx x, int uid)
 724 {
 725   while (x != 0 && INSN_UID (x) != uid)
 726     x = NEXT_INSN (x);
 727   if (x != 0)
 728     {
 729       debug_rtx_list (x, debug_rtx_count);
 730       return x;
 731     }
 732   else
 733     {
 734       fprintf (stderr, "insn uid %d not found\n", uid);
 735       return 0;
 736     }
 737 }
 738
 739 /* External entry point for printing a chain of insns
 740    starting with RTX_FIRST onto file OUTF.
 741    A blank line separates insns.
 742
 743    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 744
 745 void
 746 print_rtl (FILE *outf, const_rtx rtx_first)
 747 {
 748   const_rtx tmp_rtx;
 749
 750   outfile = outf;
 751   sawclose = 0;
 752
 753   if (rtx_first == 0)
 754     {
 755       fputs (print_rtx_head, outf);
 756       fputs ("(nil)\n", outf);
 757     }
 758   else
 759     switch (GET_CODE (rtx_first))
 760       {
 761       case INSN:
 762       case JUMP_INSN:
 763       case CALL_INSN:
 764       case NOTE:
 765       case CODE_LABEL:
 766       case BARRIER:
 767         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 768           {
 769             fputs (print_rtx_head, outfile);
 770             print_rtx (tmp_rtx);
 771             fprintf (outfile, "\n");
 772           }
 773         break;
 774
 775       default:
 776         fputs (print_rtx_head, outfile);
 777         print_rtx (rtx_first);
 778       }
 779 }
 780
 781 /* Like print_rtx, except specify a file.  */
 782 /* Return nonzero if we actually printed anything.  */
 783
 784 int
 785 print_rtl_single (FILE *outf, const_rtx x)
 786 {
 787   return print_rtl_single_with_indent (outf, x, 0);
 788 }
 789
 790 /* Like print_rtl_single, except specify a file and indentation.  */
 791
 792 int
 793 print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
 794 {
 795   int old_indent = indent;
 796   char *s_indent = (char *) alloca ((size_t) ind + 1);
 797   memset ((void *) s_indent, ' ', (size_t) ind);
 798   s_indent[ind] = '\0';
 799
 800   indent = ind;
 801   outfile = outf;
 802   sawclose = 0;
 803   fputs (s_indent, outfile);
 804   fputs (print_rtx_head, outfile);
 805   print_rtx (x);
 806   putc ('\n', outf);
 807   indent = old_indent;
 808   return 1;
 809 }
 810
 811
 812 /* Like print_rtl except without all the detail; for example,
 813    if RTX is a CONST_INT then print in decimal format.  */
 814
 815 void
 816 print_simple_rtl (FILE *outf, const_rtx x)
 817 {
 818   flag_simple = 1;
 819   print_rtl (outf, x);
 820   flag_simple = 0;
 821 }