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            || GET_CODE (in_rtx) == INT_LIST)
 155           && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 156         fprintf (outfile, ":%s",
 157                  GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 158
 159       /* For other rtl, print the mode if it's not VOID.  */
 160       else if (GET_MODE (in_rtx) != VOIDmode)
 161         fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 162
 163 #ifndef GENERATOR_FILE
 164       if (GET_CODE (in_rtx) == VAR_LOCATION)
 165         {
 166           if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 167             fputs (" <debug string placeholder>", outfile);
 168           else
 169             print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 170           fputc (' ', outfile);
 171           print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 172           if (PAT_VAR_LOCATION_STATUS (in_rtx)
 173               == VAR_INIT_STATUS_UNINITIALIZED)
 174             fprintf (outfile, " [uninit]");
 175           sawclose = 1;
 176           i = GET_RTX_LENGTH (VAR_LOCATION);
 177         }
 178 #endif
 179     }
 180
 181 #ifndef GENERATOR_FILE
 182   if (CONST_DOUBLE_AS_FLOAT_P (in_rtx))
 183     i = 5;
 184 #endif
 185
 186   /* Get the format string and skip the first elements if we have handled
 187      them already.  */
 188   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 189   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 190     switch (*format_ptr++)
 191       {
 192         const char *str;
 193
 194       case 'T':
 195         str = XTMPL (in_rtx, i);
 196         goto string;
 197
 198       case 'S':
 199       case 's':
 200         str = XSTR (in_rtx, i);
 201       string:
 202
 203         if (str == 0)
 204           fputs (" \"\"", outfile);
 205         else
 206           fprintf (outfile, " (\"%s\")", str);
 207         sawclose = 1;
 208         break;
 209
 210         /* 0 indicates a field for internal use that should not be printed.
 211            An exception is the third field of a NOTE, where it indicates
 212            that the field has several different valid contents.  */
 213       case '0':
 214         if (i == 1 && REG_P (in_rtx))
 215           {
 216             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 217               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 218           }
 219 #ifndef GENERATOR_FILE
 220         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 221           {
 222             int flags = SYMBOL_REF_FLAGS (in_rtx);
 223             if (flags)
 224               fprintf (outfile, " [flags %#x]", flags);
 225           }
 226         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 227           {
 228             tree decl = SYMBOL_REF_DECL (in_rtx);
 229             if (decl)
 230               print_node_brief (outfile, "", decl, dump_flags);
 231           }
 232 #endif
 233         else if (i == 4 && NOTE_P (in_rtx))
 234           {
 235             switch (NOTE_KIND (in_rtx))
 236               {
 237               case NOTE_INSN_EH_REGION_BEG:
 238               case NOTE_INSN_EH_REGION_END:
 239                 if (flag_dump_unnumbered)
 240                   fprintf (outfile, " #");
 241                 else
 242                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 243                 sawclose = 1;
 244                 break;
 245
 246               case NOTE_INSN_BLOCK_BEG:
 247               case NOTE_INSN_BLOCK_END:
 248 #ifndef GENERATOR_FILE
 249                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 250 #endif
 251                 sawclose = 1;
 252                 break;
 253
 254               case NOTE_INSN_BASIC_BLOCK:
 255                 {
 256 #ifndef GENERATOR_FILE
 257                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 258                   if (bb != 0)
 259                     fprintf (outfile, " [bb %d]", bb->index);
 260 #endif
 261                   break;
 262                 }
 263
 264               case NOTE_INSN_DELETED_LABEL:
 265               case NOTE_INSN_DELETED_DEBUG_LABEL:
 266                 {
 267                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 268                   if (label)
 269                     fprintf (outfile, " (\"%s\")", label);
 270                   else
 271                     fprintf (outfile, " \"\"");
 272                 }
 273                 break;
 274
 275               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 276                 {
 277 #ifndef GENERATOR_FILE
 278                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 279                   if (bb != 0)
 280                     fprintf (outfile, " [bb %d]", bb->index);
 281 #endif
 282                   break;
 283                 }
 284
 285               case NOTE_INSN_VAR_LOCATION:
 286               case NOTE_INSN_CALL_ARG_LOCATION:
 287 #ifndef GENERATOR_FILE
 288                 fputc (' ', outfile);
 289                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 290 #endif
 291                 break;
 292
 293               case NOTE_INSN_CFI:
 294 #ifndef GENERATOR_FILE
 295                 fputc ('\n', outfile);
 296                 output_cfi_directive (outfile, NOTE_CFI (in_rtx));
 297                 fputc ('\t', outfile);
 298 #endif
 299                 break;
 300
 301               default:
 302                 break;
 303               }
 304           }
 305         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 306           {
 307             /* Output the JUMP_LABEL reference.  */
 308             fprintf (outfile, "\n%s%*s -> ", print_rtx_head, indent * 2, "");
 309             if (GET_CODE (JUMP_LABEL (in_rtx)) == RETURN)
 310               fprintf (outfile, "return");
 311             else if (GET_CODE (JUMP_LABEL (in_rtx)) == SIMPLE_RETURN)
 312               fprintf (outfile, "simple_return");
 313             else
 314               fprintf (outfile, "%d", INSN_UID (JUMP_LABEL (in_rtx)));
 315           }
 316         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 317           {
 318 #ifndef GENERATOR_FILE
 319             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 320
 321             fprintf (outfile, " %u:%u", val->uid, val->hash);
 322             dump_addr (outfile, " @", in_rtx);
 323             dump_addr (outfile, "/", (void*)val);
 324 #endif
 325           }
 326         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 327           {
 328 #ifndef GENERATOR_FILE
 329             fprintf (outfile, " D#%i",
 330                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 331 #endif
 332           }
 333         else if (i == 0 && GET_CODE (in_rtx) == ENTRY_VALUE)
 334           {
 335             indent += 2;
 336             if (!sawclose)
 337               fprintf (outfile, " ");
 338             print_rtx (ENTRY_VALUE_EXP (in_rtx));
 339             indent -= 2;
 340           }
 341         break;
 342
 343       case 'e':
 344       do_e:
 345         indent += 2;
 346         if (i == 7 && INSN_P (in_rtx))
 347           /* Put REG_NOTES on their own line.  */
 348           fprintf (outfile, "\n%s%*s",
 349                    print_rtx_head, indent * 2, "");
 350         if (!sawclose)
 351           fprintf (outfile, " ");
 352         print_rtx (XEXP (in_rtx, i));
 353         indent -= 2;
 354         break;
 355
 356       case 'E':
 357       case 'V':
 358         indent += 2;
 359         if (sawclose)
 360           {
 361             fprintf (outfile, "\n%s%*s",
 362                      print_rtx_head, indent * 2, "");
 363             sawclose = 0;
 364           }
 365         fputs (" [", outfile);
 366         if (NULL != XVEC (in_rtx, i))
 367           {
 368             indent += 2;
 369             if (XVECLEN (in_rtx, i))
 370               sawclose = 1;
 371
 372             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 373               print_rtx (XVECEXP (in_rtx, i, j));
 374
 375             indent -= 2;
 376           }
 377         if (sawclose)
 378           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 379
 380         fputs ("]", outfile);
 381         sawclose = 1;
 382         indent -= 2;
 383         break;
 384
 385       case 'w':
 386         if (! flag_simple)
 387           fprintf (outfile, " ");
 388         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 389         if (! flag_simple)
 390           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 391                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 392         break;
 393
 394       case 'i':
 395         if (i == 5 && INSN_P (in_rtx))
 396           {
 397 #ifndef GENERATOR_FILE
 398             /*  Pretty-print insn locations.  Ignore scoping as it is mostly
 399                 redundant with line number information and do not print anything
 400                 when there is no location information available.  */
 401             if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
 402               fprintf (outfile, " %s:%i", insn_file (in_rtx),
 403                        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 /* Dump rtx REF.  */
 668
 669 DEBUG_FUNCTION void
 670 debug (const rtx_def &ref)
 671 {
 672   debug_rtx (&ref);
 673 }
 674
 675 DEBUG_FUNCTION void
 676 debug (const rtx_def *ptr)
 677 {
 678   if (ptr)
 679     debug (*ptr);
 680   else
 681     fprintf (stderr, "<nil>\n");
 682 }
 683
 684 /* Count of rtx's to print with debug_rtx_list.
 685    This global exists because gdb user defined commands have no arguments.  */
 686
 687 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 688
 689 /* Call this function to print list from X on.
 690
 691    N is a count of the rtx's to print. Positive values print from the specified
 692    rtx on.  Negative values print a window around the rtx.
 693    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 694
 695 DEBUG_FUNCTION void
 696 debug_rtx_list (const_rtx x, int n)
 697 {
 698   int i,count;
 699   const_rtx insn;
 700
 701   count = n == 0 ? 1 : n < 0 ? -n : n;
 702
 703   /* If we are printing a window, back up to the start.  */
 704
 705   if (n < 0)
 706     for (i = count / 2; i > 0; i--)
 707       {
 708         if (PREV_INSN (x) == 0)
 709           break;
 710         x = PREV_INSN (x);
 711       }
 712
 713   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 714     {
 715       debug_rtx (insn);
 716       fprintf (stderr, "\n");
 717     }
 718 }
 719
 720 /* Call this function to print an rtx list from START to END inclusive.  */
 721
 722 DEBUG_FUNCTION void
 723 debug_rtx_range (const_rtx start, const_rtx end)
 724 {
 725   while (1)
 726     {
 727       debug_rtx (start);
 728       fprintf (stderr, "\n");
 729       if (!start || start == end)
 730         break;
 731       start = NEXT_INSN (start);
 732     }
 733 }
 734
 735 /* Call this function to search an rtx list to find one with insn uid UID,
 736    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 737    The found insn is returned to enable further debugging analysis.  */
 738
 739 DEBUG_FUNCTION const_rtx
 740 debug_rtx_find (const_rtx x, int uid)
 741 {
 742   while (x != 0 && INSN_UID (x) != uid)
 743     x = NEXT_INSN (x);
 744   if (x != 0)
 745     {
 746       debug_rtx_list (x, debug_rtx_count);
 747       return x;
 748     }
 749   else
 750     {
 751       fprintf (stderr, "insn uid %d not found\n", uid);
 752       return 0;
 753     }
 754 }
 755
 756 /* External entry point for printing a chain of insns
 757    starting with RTX_FIRST onto file OUTF.
 758    A blank line separates insns.
 759
 760    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 761
 762 void
 763 print_rtl (FILE *outf, const_rtx rtx_first)
 764 {
 765   const_rtx tmp_rtx;
 766
 767   outfile = outf;
 768   sawclose = 0;
 769
 770   if (rtx_first == 0)
 771     {
 772       fputs (print_rtx_head, outf);
 773       fputs ("(nil)\n", outf);
 774     }
 775   else
 776     switch (GET_CODE (rtx_first))
 777       {
 778       case INSN:
 779       case JUMP_INSN:
 780       case CALL_INSN:
 781       case NOTE:
 782       case CODE_LABEL:
 783       case JUMP_TABLE_DATA:
 784       case BARRIER:
 785         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 786           {
 787             fputs (print_rtx_head, outfile);
 788             print_rtx (tmp_rtx);
 789             fprintf (outfile, "\n");
 790           }
 791         break;
 792
 793       default:
 794         fputs (print_rtx_head, outfile);
 795         print_rtx (rtx_first);
 796       }
 797 }
 798
 799 /* Like print_rtx, except specify a file.  */
 800 /* Return nonzero if we actually printed anything.  */
 801
 802 int
 803 print_rtl_single (FILE *outf, const_rtx x)
 804 {
 805   return print_rtl_single_with_indent (outf, x, 0);
 806 }
 807
 808 /* Like print_rtl_single, except specify a file and indentation.  */
 809
 810 int
 811 print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
 812 {
 813   int old_indent = indent;
 814   char *s_indent = (char *) alloca ((size_t) ind + 1);
 815   memset ((void *) s_indent, ' ', (size_t) ind);
 816   s_indent[ind] = '\0';
 817
 818   indent = ind;
 819   outfile = outf;
 820   sawclose = 0;
 821   fputs (s_indent, outfile);
 822   fputs (print_rtx_head, outfile);
 823   print_rtx (x);
 824   putc ('\n', outf);
 825   indent = old_indent;
 826   return 1;
 827 }
 828
 829
 830 /* Like print_rtl except without all the detail; for example,
 831    if RTX is a CONST_INT then print in decimal format.  */
 832
 833 void
 834 print_simple_rtl (FILE *outf, const_rtx x)
 835 {
 836   flag_simple = 1;
 837   print_rtl (outf, x);
 838   flag_simple = 0;
 839 }