gcc/print-rtl.c

   1 /* Print RTL for GCC.
   2    Copyright (C) 1987-2014 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 bool in_call_function_usage;
  55
  56 static void print_rtx (const_rtx);
  57
  58 /* String printed at beginning of each RTL when it is dumped.
  59    This string is set to ASM_COMMENT_START when the RTL is dumped in
  60    the assembly output file.  */
  61 const char *print_rtx_head = "";
  62
  63 #ifdef GENERATOR_FILE
  64 /* These are defined from the .opt file when not used in generator
  65    programs.  */
  66
  67 /* Nonzero means suppress output of instruction numbers
  68    in debugging dumps.
  69    This must be defined here so that programs like gencodes can be linked.  */
  70 int flag_dump_unnumbered = 0;
  71
  72 /* Nonzero means suppress output of instruction numbers for previous
  73    and next insns in debugging dumps.
  74    This must be defined here so that programs like gencodes can be linked.  */
  75 int flag_dump_unnumbered_links = 0;
  76 #endif
  77
  78 /* Nonzero means use simplified format without flags, modes, etc.  */
  79 int flag_simple = 0;
  80
  81 #ifndef GENERATOR_FILE
  82 void
  83 print_mem_expr (FILE *outfile, const_tree expr)
  84 {
  85   fputc (' ', outfile);
  86   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  87 }
  88 #endif
  89
  90 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  91
  92 static void
  93 print_rtx (const_rtx in_rtx)
  94 {
  95   int i = 0;
  96   int j;
  97   const char *format_ptr;
  98   int is_insn;
  99
 100   if (sawclose)
 101     {
 102       if (flag_simple)
 103         fputc (' ', outfile);
 104       else
 105         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 106       sawclose = 0;
 107     }
 108
 109   if (in_rtx == 0)
 110     {
 111       fputs ("(nil)", outfile);
 112       sawclose = 1;
 113       return;
 114     }
 115   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 116     {
 117        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 118                 print_rtx_head, indent * 2, "");
 119        sawclose = 1;
 120        return;
 121     }
 122
 123   is_insn = INSN_P (in_rtx);
 124
 125   /* Print name of expression code.  */
 126   if (flag_simple && CONST_INT_P (in_rtx))
 127     fputc ('(', outfile);
 128   else
 129     fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 130
 131   if (! flag_simple)
 132     {
 133       if (RTX_FLAG (in_rtx, in_struct))
 134         fputs ("/s", outfile);
 135
 136       if (RTX_FLAG (in_rtx, volatil))
 137         fputs ("/v", outfile);
 138
 139       if (RTX_FLAG (in_rtx, unchanging))
 140         fputs ("/u", outfile);
 141
 142       if (RTX_FLAG (in_rtx, frame_related))
 143         fputs ("/f", outfile);
 144
 145       if (RTX_FLAG (in_rtx, jump))
 146         fputs ("/j", outfile);
 147
 148       if (RTX_FLAG (in_rtx, call))
 149         fputs ("/c", outfile);
 150
 151       if (RTX_FLAG (in_rtx, return_val))
 152         fputs ("/i", outfile);
 153
 154       /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 155       if ((GET_CODE (in_rtx) == EXPR_LIST
 156            || GET_CODE (in_rtx) == INSN_LIST
 157            || GET_CODE (in_rtx) == INT_LIST)
 158           && (int)GET_MODE (in_rtx) < REG_NOTE_MAX
 159           && !in_call_function_usage)
 160         fprintf (outfile, ":%s",
 161                  GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 162
 163       /* For other rtl, print the mode if it's not VOID.  */
 164       else if (GET_MODE (in_rtx) != VOIDmode)
 165         fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 166
 167 #ifndef GENERATOR_FILE
 168       if (GET_CODE (in_rtx) == VAR_LOCATION)
 169         {
 170           if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 171             fputs (" <debug string placeholder>", outfile);
 172           else
 173             print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 174           fputc (' ', outfile);
 175           print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 176           if (PAT_VAR_LOCATION_STATUS (in_rtx)
 177               == VAR_INIT_STATUS_UNINITIALIZED)
 178             fprintf (outfile, " [uninit]");
 179           sawclose = 1;
 180           i = GET_RTX_LENGTH (VAR_LOCATION);
 181         }
 182 #endif
 183     }
 184
 185 #ifndef GENERATOR_FILE
 186   if (CONST_DOUBLE_AS_FLOAT_P (in_rtx))
 187     i = 5;
 188 #endif
 189
 190   /* Get the format string and skip the first elements if we have handled
 191      them already.  */
 192   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 193   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 194     switch (*format_ptr++)
 195       {
 196         const char *str;
 197
 198       case 'T':
 199         str = XTMPL (in_rtx, i);
 200         goto string;
 201
 202       case 'S':
 203       case 's':
 204         str = XSTR (in_rtx, i);
 205       string:
 206
 207         if (str == 0)
 208           fputs (" \"\"", outfile);
 209         else
 210           fprintf (outfile, " (\"%s\")", str);
 211         sawclose = 1;
 212         break;
 213
 214         /* 0 indicates a field for internal use that should not be printed.
 215            An exception is the third field of a NOTE, where it indicates
 216            that the field has several different valid contents.  */
 217       case '0':
 218 #ifndef GENERATOR_FILE
 219         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         else if (i == 4 && NOTE_P (in_rtx))
 232           {
 233             switch (NOTE_KIND (in_rtx))
 234               {
 235               case NOTE_INSN_EH_REGION_BEG:
 236               case NOTE_INSN_EH_REGION_END:
 237                 if (flag_dump_unnumbered)
 238                   fprintf (outfile, " #");
 239                 else
 240                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 241                 sawclose = 1;
 242                 break;
 243
 244               case NOTE_INSN_BLOCK_BEG:
 245               case NOTE_INSN_BLOCK_END:
 246                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 247                 sawclose = 1;
 248                 break;
 249
 250               case NOTE_INSN_BASIC_BLOCK:
 251                 {
 252                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 253                   if (bb != 0)
 254                     fprintf (outfile, " [bb %d]", bb->index);
 255                   break;
 256                 }
 257
 258               case NOTE_INSN_DELETED_LABEL:
 259               case NOTE_INSN_DELETED_DEBUG_LABEL:
 260                 {
 261                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 262                   if (label)
 263                     fprintf (outfile, " (\"%s\")", label);
 264                   else
 265                     fprintf (outfile, " \"\"");
 266                 }
 267                 break;
 268
 269               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 270                 {
 271                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 272                   if (bb != 0)
 273                     fprintf (outfile, " [bb %d]", bb->index);
 274                   break;
 275                 }
 276
 277               case NOTE_INSN_VAR_LOCATION:
 278               case NOTE_INSN_CALL_ARG_LOCATION:
 279                 fputc (' ', outfile);
 280                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 281                 break;
 282
 283               case NOTE_INSN_CFI:
 284                 fputc ('\n', outfile);
 285                 output_cfi_directive (outfile, NOTE_CFI (in_rtx));
 286                 fputc ('\t', outfile);
 287                 break;
 288
 289               default:
 290                 break;
 291               }
 292           }
 293         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 294           {
 295             /* Output the JUMP_LABEL reference.  */
 296             fprintf (outfile, "\n%s%*s -> ", print_rtx_head, indent * 2, "");
 297             if (GET_CODE (JUMP_LABEL (in_rtx)) == RETURN)
 298               fprintf (outfile, "return");
 299             else if (GET_CODE (JUMP_LABEL (in_rtx)) == SIMPLE_RETURN)
 300               fprintf (outfile, "simple_return");
 301             else
 302               fprintf (outfile, "%d", INSN_UID (JUMP_LABEL (in_rtx)));
 303           }
 304         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 305           {
 306             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 307
 308             fprintf (outfile, " %u:%u", val->uid, val->hash);
 309             dump_addr (outfile, " @", in_rtx);
 310             dump_addr (outfile, "/", (void*)val);
 311           }
 312         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 313           {
 314             fprintf (outfile, " D#%i",
 315                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 316           }
 317         else if (i == 0 && GET_CODE (in_rtx) == ENTRY_VALUE)
 318           {
 319             indent += 2;
 320             if (!sawclose)
 321               fprintf (outfile, " ");
 322             print_rtx (ENTRY_VALUE_EXP (in_rtx));
 323             indent -= 2;
 324           }
 325 #endif
 326         break;
 327
 328       case 'e':
 329       do_e:
 330         indent += 2;
 331         if (i == 7 && INSN_P (in_rtx))
 332           /* Put REG_NOTES on their own line.  */
 333           fprintf (outfile, "\n%s%*s",
 334                    print_rtx_head, indent * 2, "");
 335         if (!sawclose)
 336           fprintf (outfile, " ");
 337         if (i == 8 && CALL_P (in_rtx))
 338           {
 339             in_call_function_usage = true;
 340             print_rtx (XEXP (in_rtx, i));
 341             in_call_function_usage = false;
 342           }
 343         else
 344           print_rtx (XEXP (in_rtx, i));
 345         indent -= 2;
 346         break;
 347
 348       case 'E':
 349       case 'V':
 350         indent += 2;
 351         if (sawclose)
 352           {
 353             fprintf (outfile, "\n%s%*s",
 354                      print_rtx_head, indent * 2, "");
 355             sawclose = 0;
 356           }
 357         fputs (" [", outfile);
 358         if (NULL != XVEC (in_rtx, i))
 359           {
 360             indent += 2;
 361             if (XVECLEN (in_rtx, i))
 362               sawclose = 1;
 363
 364             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 365               print_rtx (XVECEXP (in_rtx, i, j));
 366
 367             indent -= 2;
 368           }
 369         if (sawclose)
 370           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 371
 372         fputs ("]", outfile);
 373         sawclose = 1;
 374         indent -= 2;
 375         break;
 376
 377       case 'w':
 378         if (! flag_simple)
 379           fprintf (outfile, " ");
 380         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 381         if (! flag_simple)
 382           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 383                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 384         break;
 385
 386       case 'i':
 387         if (i == 5 && INSN_P (in_rtx))
 388           {
 389 #ifndef GENERATOR_FILE
 390             /*  Pretty-print insn locations.  Ignore scoping as it is mostly
 391                 redundant with line number information and do not print anything
 392                 when there is no location information available.  */
 393             if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
 394               fprintf (outfile, " %s:%i", insn_file (in_rtx),
 395                        insn_line (in_rtx));
 396 #endif
 397           }
 398         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 399           {
 400 #ifndef GENERATOR_FILE
 401             if (ASM_OPERANDS_SOURCE_LOCATION (in_rtx) != UNKNOWN_LOCATION)
 402               fprintf (outfile, " %s:%i",
 403                        LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 404                        LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 405 #endif
 406           }
 407         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 408           {
 409 #ifndef GENERATOR_FILE
 410             if (ASM_INPUT_SOURCE_LOCATION (in_rtx) != UNKNOWN_LOCATION)
 411               fprintf (outfile, " %s:%i",
 412                        LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 413                        LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 414 #endif
 415           }
 416         else if (i == 6 && NOTE_P (in_rtx))
 417           {
 418             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 419                other times often contains garbage from INSN->NOTE death.  */
 420             if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
 421                 || NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
 422               fprintf (outfile, " %d",  XINT (in_rtx, i));
 423           }
 424 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 425         else if (i == 1
 426                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 427                  && XINT (in_rtx, 1) >= 0
 428                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 429           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 430 #endif
 431 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 432         else if (i == 1
 433                  && (GET_CODE (in_rtx) == UNSPEC
 434                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 435                  && XINT (in_rtx, 1) >= 0
 436                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 437           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 438 #endif
 439         else
 440           {
 441             int value = XINT (in_rtx, i);
 442             const char *name;
 443
 444 #ifndef GENERATOR_FILE
 445             if (REG_P (in_rtx) && (unsigned) value < FIRST_PSEUDO_REGISTER)
 446               fprintf (outfile, " %d %s", value, reg_names[value]);
 447             else if (REG_P (in_rtx)
 448                      && (unsigned) value <= LAST_VIRTUAL_REGISTER)
 449               {
 450                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 451                   fprintf (outfile, " %d virtual-incoming-args", value);
 452                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 453                   fprintf (outfile, " %d virtual-stack-vars", value);
 454                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 455                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 456                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 457                   fprintf (outfile, " %d virtual-outgoing-args", value);
 458                 else if (value == VIRTUAL_CFA_REGNUM)
 459                   fprintf (outfile, " %d virtual-cfa", value);
 460                 else if (value == VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM)
 461                   fprintf (outfile, " %d virtual-preferred-stack-boundary",
 462                            value);
 463                 else
 464                   fprintf (outfile, " %d virtual-reg-%d", value,
 465                            value-FIRST_VIRTUAL_REGISTER);
 466               }
 467             else
 468 #endif
 469               if (flag_dump_unnumbered
 470                      && (is_insn || NOTE_P (in_rtx)))
 471               fputc ('#', outfile);
 472             else
 473               fprintf (outfile, " %d", value);
 474
 475 #ifndef GENERATOR_FILE
 476             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 477               {
 478                 fputs (" [", outfile);
 479                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 480                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 481                 if (REG_EXPR (in_rtx))
 482                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 483
 484                 if (REG_OFFSET (in_rtx))
 485                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 486                            REG_OFFSET (in_rtx));
 487                 fputs (" ]", outfile);
 488               }
 489             if (REG_P (in_rtx) && REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 490               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 491 #endif
 492
 493             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 494                 && XINT (in_rtx, i) >= 0
 495                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 496               fprintf (outfile, " {%s}", name);
 497             sawclose = 0;
 498           }
 499         break;
 500
 501       /* Print NOTE_INSN names rather than integer codes.  */
 502
 503       case 'n':
 504         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 505         sawclose = 0;
 506         break;
 507
 508       case 'u':
 509         if (XEXP (in_rtx, i) != NULL)
 510           {
 511             rtx sub = XEXP (in_rtx, i);
 512             enum rtx_code subc = GET_CODE (sub);
 513
 514             if (GET_CODE (in_rtx) == LABEL_REF)
 515               {
 516                 if (subc == NOTE
 517                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 518                   {
 519                     if (flag_dump_unnumbered)
 520                       fprintf (outfile, " [# deleted]");
 521                     else
 522                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 523                     sawclose = 0;
 524                     break;
 525                   }
 526
 527                 if (subc != CODE_LABEL)
 528                   goto do_e;
 529               }
 530
 531             if (flag_dump_unnumbered
 532                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 533                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 534                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 535               fputs (" #", outfile);
 536             else
 537               fprintf (outfile, " %d", INSN_UID (sub));
 538           }
 539         else
 540           fputs (" 0", outfile);
 541         sawclose = 0;
 542         break;
 543
 544       case 't':
 545 #ifndef GENERATOR_FILE
 546         if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
 547           print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
 548         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_PARAMETER_REF)
 549           print_mem_expr (outfile, DEBUG_PARAMETER_REF_DECL (in_rtx));
 550         else
 551           dump_addr (outfile, " ", XTREE (in_rtx, i));
 552 #endif
 553         break;
 554
 555       case '*':
 556         fputs (" Unknown", outfile);
 557         sawclose = 0;
 558         break;
 559
 560       case 'B':
 561 #ifndef GENERATOR_FILE
 562         if (XBBDEF (in_rtx, i))
 563           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 564 #endif
 565         break;
 566
 567       default:
 568         gcc_unreachable ();
 569       }
 570
 571   switch (GET_CODE (in_rtx))
 572     {
 573 #ifndef GENERATOR_FILE
 574     case MEM:
 575       if (__builtin_expect (final_insns_dump_p, false))
 576         fprintf (outfile, " [");
 577       else
 578         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 579                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 580
 581       if (MEM_EXPR (in_rtx))
 582         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 583       else
 584         fputc (' ', outfile);
 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
 616     case CONST_WIDE_INT:
 617       fprintf (outfile, " ");
 618       cwi_output_hex (outfile, in_rtx);
 619       break;
 620 #endif
 621
 622     case CODE_LABEL:
 623       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 624       switch (LABEL_KIND (in_rtx))
 625         {
 626           case LABEL_NORMAL: break;
 627           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 628           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 629           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 630           default: gcc_unreachable ();
 631         }
 632       break;
 633
 634     default:
 635       break;
 636     }
 637
 638   fputc (')', outfile);
 639   sawclose = 1;
 640 }
 641
 642 /* Print an rtx on the current line of FILE.  Initially indent IND
 643    characters.  */
 644
 645 void
 646 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 647 {
 648   int oldsaw = sawclose;
 649   int oldindent = indent;
 650
 651   sawclose = 0;
 652   indent = ind;
 653   outfile = outf;
 654   print_rtx (x);
 655   sawclose = oldsaw;
 656   indent = oldindent;
 657 }
 658
 659 /* Call this function from the debugger to see what X looks like.  */
 660
 661 DEBUG_FUNCTION void
 662 debug_rtx (const_rtx x)
 663 {
 664   outfile = stderr;
 665   sawclose = 0;
 666   print_rtx (x);
 667   fprintf (stderr, "\n");
 668 }
 669
 670 /* Dump rtx REF.  */
 671
 672 DEBUG_FUNCTION void
 673 debug (const rtx_def &ref)
 674 {
 675   debug_rtx (&ref);
 676 }
 677
 678 DEBUG_FUNCTION void
 679 debug (const rtx_def *ptr)
 680 {
 681   if (ptr)
 682     debug (*ptr);
 683   else
 684     fprintf (stderr, "<nil>\n");
 685 }
 686
 687 /* Count of rtx's to print with debug_rtx_list.
 688    This global exists because gdb user defined commands have no arguments.  */
 689
 690 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 691
 692 /* Call this function to print list from X on.
 693
 694    N is a count of the rtx's to print. Positive values print from the specified
 695    rtx on.  Negative values print a window around the rtx.
 696    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 697
 698 DEBUG_FUNCTION void
 699 debug_rtx_list (const_rtx x, int n)
 700 {
 701   int i,count;
 702   const_rtx insn;
 703
 704   count = n == 0 ? 1 : n < 0 ? -n : n;
 705
 706   /* If we are printing a window, back up to the start.  */
 707
 708   if (n < 0)
 709     for (i = count / 2; i > 0; i--)
 710       {
 711         if (PREV_INSN (x) == 0)
 712           break;
 713         x = PREV_INSN (x);
 714       }
 715
 716   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 717     {
 718       debug_rtx (insn);
 719       fprintf (stderr, "\n");
 720     }
 721 }
 722
 723 /* Call this function to print an rtx list from START to END inclusive.  */
 724
 725 DEBUG_FUNCTION void
 726 debug_rtx_range (const_rtx start, const_rtx end)
 727 {
 728   while (1)
 729     {
 730       debug_rtx (start);
 731       fprintf (stderr, "\n");
 732       if (!start || start == end)
 733         break;
 734       start = NEXT_INSN (start);
 735     }
 736 }
 737
 738 /* Call this function to search an rtx list to find one with insn uid UID,
 739    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 740    The found insn is returned to enable further debugging analysis.  */
 741
 742 DEBUG_FUNCTION const_rtx
 743 debug_rtx_find (const_rtx x, int uid)
 744 {
 745   while (x != 0 && INSN_UID (x) != uid)
 746     x = NEXT_INSN (x);
 747   if (x != 0)
 748     {
 749       debug_rtx_list (x, debug_rtx_count);
 750       return x;
 751     }
 752   else
 753     {
 754       fprintf (stderr, "insn uid %d not found\n", uid);
 755       return 0;
 756     }
 757 }
 758
 759 /* External entry point for printing a chain of insns
 760    starting with RTX_FIRST onto file OUTF.
 761    A blank line separates insns.
 762
 763    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 764
 765 void
 766 print_rtl (FILE *outf, const_rtx rtx_first)
 767 {
 768   const_rtx tmp_rtx;
 769
 770   outfile = outf;
 771   sawclose = 0;
 772
 773   if (rtx_first == 0)
 774     {
 775       fputs (print_rtx_head, outf);
 776       fputs ("(nil)\n", outf);
 777     }
 778   else
 779     switch (GET_CODE (rtx_first))
 780       {
 781       case INSN:
 782       case JUMP_INSN:
 783       case CALL_INSN:
 784       case NOTE:
 785       case CODE_LABEL:
 786       case JUMP_TABLE_DATA:
 787       case BARRIER:
 788         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 789           {
 790             fputs (print_rtx_head, outfile);
 791             print_rtx (tmp_rtx);
 792             fprintf (outfile, "\n");
 793           }
 794         break;
 795
 796       default:
 797         fputs (print_rtx_head, outfile);
 798         print_rtx (rtx_first);
 799       }
 800 }
 801
 802 /* Like print_rtx, except specify a file.  */
 803 /* Return nonzero if we actually printed anything.  */
 804
 805 int
 806 print_rtl_single (FILE *outf, const_rtx x)
 807 {
 808   return print_rtl_single_with_indent (outf, x, 0);
 809 }
 810
 811 /* Like print_rtl_single, except specify a file and indentation.  */
 812
 813 int
 814 print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
 815 {
 816   int old_indent = indent;
 817   char *s_indent = (char *) alloca ((size_t) ind + 1);
 818   memset ((void *) s_indent, ' ', (size_t) ind);
 819   s_indent[ind] = '\0';
 820
 821   indent = ind;
 822   outfile = outf;
 823   sawclose = 0;
 824   fputs (s_indent, outfile);
 825   fputs (print_rtx_head, outfile);
 826   print_rtx (x);
 827   putc ('\n', outf);
 828   indent = old_indent;
 829   return 1;
 830 }
 831
 832
 833 /* Like print_rtl except without all the detail; for example,
 834    if RTX is a CONST_INT then print in decimal format.  */
 835
 836 void
 837 print_simple_rtl (FILE *outf, const_rtx x)
 838 {
 839   flag_simple = 1;
 840   print_rtl (outf, x);
 841   flag_simple = 0;
 842 }