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
   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 "tree-pass.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 /* Nonzero if we are dumping graphical description.  */
  80 int dump_for_graph;
  81
  82 #ifndef GENERATOR_FILE
  83 void
  84 print_mem_expr (FILE *outfile, const_tree expr)
  85 {
  86   fputc (' ', outfile);
  87   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  88 }
  89 #endif
  90
  91 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  92
  93 static void
  94 print_rtx (const_rtx in_rtx)
  95 {
  96   int i = 0;
  97   int j;
  98   const char *format_ptr;
  99   int is_insn;
 100
 101   if (sawclose)
 102     {
 103       if (flag_simple)
 104         fputc (' ', outfile);
 105       else
 106         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 107       sawclose = 0;
 108     }
 109
 110   if (in_rtx == 0)
 111     {
 112       fputs ("(nil)", outfile);
 113       sawclose = 1;
 114       return;
 115     }
 116   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 117     {
 118        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 119                 print_rtx_head, indent * 2, "");
 120        sawclose = 1;
 121        return;
 122     }
 123
 124   is_insn = INSN_P (in_rtx);
 125
 126   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 127      in separate nodes and therefore have to handle them special here.  */
 128   if (dump_for_graph
 129       && (is_insn || NOTE_P (in_rtx)
 130           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 131     {
 132       i = 3;
 133       indent = 0;
 134     }
 135   else
 136     {
 137       /* Print name of expression code.  */
 138       if (flag_simple && CONST_INT_P (in_rtx))
 139         fputc ('(', outfile);
 140       else
 141         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 142
 143       if (! flag_simple)
 144         {
 145           if (RTX_FLAG (in_rtx, in_struct))
 146             fputs ("/s", outfile);
 147
 148           if (RTX_FLAG (in_rtx, volatil))
 149             fputs ("/v", outfile);
 150
 151           if (RTX_FLAG (in_rtx, unchanging))
 152             fputs ("/u", outfile);
 153
 154           if (RTX_FLAG (in_rtx, frame_related))
 155             fputs ("/f", outfile);
 156
 157           if (RTX_FLAG (in_rtx, jump))
 158             fputs ("/j", outfile);
 159
 160           if (RTX_FLAG (in_rtx, call))
 161             fputs ("/c", outfile);
 162
 163           if (RTX_FLAG (in_rtx, return_val))
 164             fputs ("/i", outfile);
 165
 166           /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 167           if ((GET_CODE (in_rtx) == EXPR_LIST
 168                || GET_CODE (in_rtx) == INSN_LIST)
 169               && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 170             fprintf (outfile, ":%s",
 171                      GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 172
 173           /* For other rtl, print the mode if it's not VOID.  */
 174           else if (GET_MODE (in_rtx) != VOIDmode)
 175             fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 176
 177 #ifndef GENERATOR_FILE
 178           if (GET_CODE (in_rtx) == VAR_LOCATION)
 179             {
 180               if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 181                 fputs (" <debug string placeholder>", outfile);
 182               else
 183                 print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 184               fputc (' ', outfile);
 185               print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 186               if (PAT_VAR_LOCATION_STATUS (in_rtx)
 187                   == VAR_INIT_STATUS_UNINITIALIZED)
 188                 fprintf (outfile, " [uninit]");
 189               sawclose = 1;
 190               i = GET_RTX_LENGTH (VAR_LOCATION);
 191             }
 192 #endif
 193         }
 194     }
 195
 196 #ifndef GENERATOR_FILE
 197   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 198     i = 5;
 199 #endif
 200
 201   /* Get the format string and skip the first elements if we have handled
 202      them already.  */
 203   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 204   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 205     switch (*format_ptr++)
 206       {
 207         const char *str;
 208
 209       case 'T':
 210         str = XTMPL (in_rtx, i);
 211         goto string;
 212
 213       case 'S':
 214       case 's':
 215         str = XSTR (in_rtx, i);
 216       string:
 217
 218         if (str == 0)
 219           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 220         else
 221           {
 222             if (dump_for_graph)
 223               fprintf (outfile, " (\\\"%s\\\")", str);
 224             else
 225               fprintf (outfile, " (\"%s\")", str);
 226           }
 227         sawclose = 1;
 228         break;
 229
 230         /* 0 indicates a field for internal use that should not be printed.
 231            An exception is the third field of a NOTE, where it indicates
 232            that the field has several different valid contents.  */
 233       case '0':
 234         if (i == 1 && REG_P (in_rtx))
 235           {
 236             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 237               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 238           }
 239 #ifndef GENERATOR_FILE
 240         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 241           {
 242             int flags = SYMBOL_REF_FLAGS (in_rtx);
 243             if (flags)
 244               fprintf (outfile, " [flags %#x]", flags);
 245           }
 246         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 247           {
 248             tree decl = SYMBOL_REF_DECL (in_rtx);
 249             if (decl)
 250               print_node_brief (outfile, "", decl, dump_flags);
 251           }
 252 #endif
 253         else if (i == 4 && NOTE_P (in_rtx))
 254           {
 255             switch (NOTE_KIND (in_rtx))
 256               {
 257               case NOTE_INSN_EH_REGION_BEG:
 258               case NOTE_INSN_EH_REGION_END:
 259                 if (flag_dump_unnumbered)
 260                   fprintf (outfile, " #");
 261                 else
 262                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 263                 sawclose = 1;
 264                 break;
 265
 266               case NOTE_INSN_BLOCK_BEG:
 267               case NOTE_INSN_BLOCK_END:
 268 #ifndef GENERATOR_FILE
 269                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 270 #endif
 271                 sawclose = 1;
 272                 break;
 273
 274               case NOTE_INSN_BASIC_BLOCK:
 275                 {
 276 #ifndef GENERATOR_FILE
 277                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 278                   if (bb != 0)
 279                     fprintf (outfile, " [bb %d]", bb->index);
 280 #endif
 281                   break;
 282                 }
 283
 284               case NOTE_INSN_DELETED_LABEL:
 285                 {
 286                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 287                   if (label)
 288                     fprintf (outfile, " (\"%s\")", label);
 289                   else
 290                     fprintf (outfile, " \"\"");
 291                 }
 292                 break;
 293
 294               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 295                 {
 296 #ifndef GENERATOR_FILE
 297                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 298                   if (bb != 0)
 299                     fprintf (outfile, " [bb %d]", bb->index);
 300 #endif
 301                   break;
 302                 }
 303
 304               case NOTE_INSN_VAR_LOCATION:
 305 #ifndef GENERATOR_FILE
 306                 fputc (' ', outfile);
 307                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 308 #endif
 309                 break;
 310
 311               default:
 312                 break;
 313               }
 314           }
 315         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 316           /* Output the JUMP_LABEL reference.  */
 317           fprintf (outfile, "\n%s%*s -> %d", print_rtx_head, indent * 2, "",
 318                    INSN_UID (JUMP_LABEL (in_rtx)));
 319         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 320           {
 321 #ifndef GENERATOR_FILE
 322             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 323
 324             fprintf (outfile, " %u:%u", val->uid, val->hash);
 325             dump_addr (outfile, " @", in_rtx);
 326             dump_addr (outfile, "/", (void*)val);
 327 #endif
 328           }
 329         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 330           {
 331 #ifndef GENERATOR_FILE
 332             fprintf (outfile, " D#%i",
 333                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 334 #endif
 335           }
 336         break;
 337
 338       case 'e':
 339       do_e:
 340         indent += 2;
 341         if (i == 7 && INSN_P (in_rtx))
 342           /* Put REG_NOTES on their own line.  */
 343           fprintf (outfile, "\n%s%*s",
 344                    print_rtx_head, indent * 2, "");
 345         if (!sawclose)
 346           fprintf (outfile, " ");
 347         print_rtx (XEXP (in_rtx, i));
 348         indent -= 2;
 349         break;
 350
 351       case 'E':
 352       case 'V':
 353         indent += 2;
 354         if (sawclose)
 355           {
 356             fprintf (outfile, "\n%s%*s",
 357                      print_rtx_head, indent * 2, "");
 358             sawclose = 0;
 359           }
 360         fputs (" [", outfile);
 361         if (NULL != XVEC (in_rtx, i))
 362           {
 363             indent += 2;
 364             if (XVECLEN (in_rtx, i))
 365               sawclose = 1;
 366
 367             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 368               print_rtx (XVECEXP (in_rtx, i, j));
 369
 370             indent -= 2;
 371           }
 372         if (sawclose)
 373           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 374
 375         fputs ("]", outfile);
 376         sawclose = 1;
 377         indent -= 2;
 378         break;
 379
 380       case 'w':
 381         if (! flag_simple)
 382           fprintf (outfile, " ");
 383         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 384         if (! flag_simple)
 385           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 386                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 387         break;
 388
 389       case 'i':
 390         if (i == 5 && INSN_P (in_rtx))
 391           {
 392 #ifndef GENERATOR_FILE
 393             /*  Pretty-print insn locators.  Ignore scoping as it is mostly
 394                 redundant with line number information and do not print anything
 395                 when there is no location information available.  */
 396             if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
 397               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 398 #endif
 399           }
 400         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 401           {
 402 #ifndef GENERATOR_FILE
 403             fprintf (outfile, " %s:%i",
 404                      locator_file (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 405                      locator_line (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 406 #endif
 407           }
 408         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 409           {
 410 #ifndef GENERATOR_FILE
 411             fprintf (outfile, " %s:%i",
 412                      locator_file (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 413                      locator_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               fprintf (outfile, " %d",  XINT (in_rtx, i));
 422           }
 423 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 424         else if (i == 1
 425                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 426                  && XINT (in_rtx, 1) >= 0
 427                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 428           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 429 #endif
 430 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 431         else if (i == 1
 432                  && (GET_CODE (in_rtx) == UNSPEC
 433                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 434                  && XINT (in_rtx, 1) >= 0
 435                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 436           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 437 #endif
 438         else
 439           {
 440             int value = XINT (in_rtx, i);
 441             const char *name;
 442
 443 #ifndef GENERATOR_FILE
 444             if (REG_P (in_rtx) && value < FIRST_PSEUDO_REGISTER)
 445               fprintf (outfile, " %d %s", REGNO (in_rtx),
 446                        reg_names[REGNO (in_rtx)]);
 447             else if (REG_P (in_rtx)
 448                      && 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
 461                   fprintf (outfile, " %d virtual-reg-%d", value,
 462                            value-FIRST_VIRTUAL_REGISTER);
 463               }
 464             else
 465 #endif
 466               if (flag_dump_unnumbered
 467                      && (is_insn || NOTE_P (in_rtx)))
 468               fputc ('#', outfile);
 469             else
 470               fprintf (outfile, " %d", value);
 471
 472 #ifndef GENERATOR_FILE
 473             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 474               {
 475                 fputs (" [", outfile);
 476                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 477                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 478                 if (REG_EXPR (in_rtx))
 479                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 480
 481                 if (REG_OFFSET (in_rtx))
 482                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 483                            REG_OFFSET (in_rtx));
 484                 fputs (" ]", outfile);
 485               }
 486 #endif
 487
 488             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 489                 && XINT (in_rtx, i) >= 0
 490                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 491               fprintf (outfile, " {%s}", name);
 492             sawclose = 0;
 493           }
 494         break;
 495
 496       /* Print NOTE_INSN names rather than integer codes.  */
 497
 498       case 'n':
 499         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 500         sawclose = 0;
 501         break;
 502
 503       case 'u':
 504         if (XEXP (in_rtx, i) != NULL)
 505           {
 506             rtx sub = XEXP (in_rtx, i);
 507             enum rtx_code subc = GET_CODE (sub);
 508
 509             if (GET_CODE (in_rtx) == LABEL_REF)
 510               {
 511                 if (subc == NOTE
 512                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 513                   {
 514                     if (flag_dump_unnumbered)
 515                       fprintf (outfile, " [# deleted]");
 516                     else
 517                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 518                     sawclose = 0;
 519                     break;
 520                   }
 521
 522                 if (subc != CODE_LABEL)
 523                   goto do_e;
 524               }
 525
 526             if (flag_dump_unnumbered
 527                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 528                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 529                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 530               fputs (" #", outfile);
 531             else
 532               fprintf (outfile, " %d", INSN_UID (sub));
 533           }
 534         else
 535           fputs (" 0", outfile);
 536         sawclose = 0;
 537         break;
 538
 539       case 't':
 540 #ifndef GENERATOR_FILE
 541         if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
 542           print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
 543         else
 544           dump_addr (outfile, " ", XTREE (in_rtx, i));
 545 #endif
 546         break;
 547
 548       case '*':
 549         fputs (" Unknown", outfile);
 550         sawclose = 0;
 551         break;
 552
 553       case 'B':
 554 #ifndef GENERATOR_FILE
 555         if (XBBDEF (in_rtx, i))
 556           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 557 #endif
 558         break;
 559
 560       default:
 561         gcc_unreachable ();
 562       }
 563
 564   switch (GET_CODE (in_rtx))
 565     {
 566 #ifndef GENERATOR_FILE
 567     case MEM:
 568       if (__builtin_expect (final_insns_dump_p, false))
 569         fprintf (outfile, " [");
 570       else
 571         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 572                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 573
 574       if (MEM_EXPR (in_rtx))
 575         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 576
 577       if (MEM_OFFSET (in_rtx))
 578         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 579                  INTVAL (MEM_OFFSET (in_rtx)));
 580
 581       if (MEM_SIZE (in_rtx))
 582         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 583                  INTVAL (MEM_SIZE (in_rtx)));
 584
 585       if (MEM_ALIGN (in_rtx) != 1)
 586         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 587
 588       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 589         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 590
 591       fputc (']', outfile);
 592       break;
 593
 594     case CONST_DOUBLE:
 595       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 596         {
 597           char s[60];
 598
 599           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 600                            sizeof (s), 0, 1);
 601           fprintf (outfile, " %s", s);
 602
 603           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 604                                sizeof (s), 0, 1);
 605           fprintf (outfile, " [%s]", s);
 606         }
 607       break;
 608 #endif
 609
 610     case CODE_LABEL:
 611       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 612       switch (LABEL_KIND (in_rtx))
 613         {
 614           case LABEL_NORMAL: break;
 615           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 616           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 617           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 618           default: gcc_unreachable ();
 619         }
 620       break;
 621
 622     default:
 623       break;
 624     }
 625
 626   if (dump_for_graph
 627       && (is_insn || NOTE_P (in_rtx)
 628           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 629     sawclose = 0;
 630   else
 631     {
 632       fputc (')', outfile);
 633       sawclose = 1;
 634     }
 635 }
 636
 637 /* Print an rtx on the current line of FILE.  Initially indent IND
 638    characters.  */
 639
 640 void
 641 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 642 {
 643   int oldsaw = sawclose;
 644   int oldindent = indent;
 645
 646   sawclose = 0;
 647   indent = ind;
 648   outfile = outf;
 649   print_rtx (x);
 650   sawclose = oldsaw;
 651   indent = oldindent;
 652 }
 653
 654 /* Call this function from the debugger to see what X looks like.  */
 655
 656 DEBUG_FUNCTION void
 657 debug_rtx (const_rtx x)
 658 {
 659   outfile = stderr;
 660   sawclose = 0;
 661   print_rtx (x);
 662   fprintf (stderr, "\n");
 663 }
 664
 665 /* Count of rtx's to print with debug_rtx_list.
 666    This global exists because gdb user defined commands have no arguments.  */
 667
 668 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 669
 670 /* Call this function to print list from X on.
 671
 672    N is a count of the rtx's to print. Positive values print from the specified
 673    rtx on.  Negative values print a window around the rtx.
 674    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 675
 676 DEBUG_FUNCTION void
 677 debug_rtx_list (const_rtx x, int n)
 678 {
 679   int i,count;
 680   const_rtx insn;
 681
 682   count = n == 0 ? 1 : n < 0 ? -n : n;
 683
 684   /* If we are printing a window, back up to the start.  */
 685
 686   if (n < 0)
 687     for (i = count / 2; i > 0; i--)
 688       {
 689         if (PREV_INSN (x) == 0)
 690           break;
 691         x = PREV_INSN (x);
 692       }
 693
 694   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 695     {
 696       debug_rtx (insn);
 697       fprintf (stderr, "\n");
 698     }
 699 }
 700
 701 /* Call this function to print an rtx list from START to END inclusive.  */
 702
 703 DEBUG_FUNCTION void
 704 debug_rtx_range (const_rtx start, const_rtx end)
 705 {
 706   while (1)
 707     {
 708       debug_rtx (start);
 709       fprintf (stderr, "\n");
 710       if (!start || start == end)
 711         break;
 712       start = NEXT_INSN (start);
 713     }
 714 }
 715
 716 /* Call this function to search an rtx list to find one with insn uid UID,
 717    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 718    The found insn is returned to enable further debugging analysis.  */
 719
 720 DEBUG_FUNCTION const_rtx
 721 debug_rtx_find (const_rtx x, int uid)
 722 {
 723   while (x != 0 && INSN_UID (x) != uid)
 724     x = NEXT_INSN (x);
 725   if (x != 0)
 726     {
 727       debug_rtx_list (x, debug_rtx_count);
 728       return x;
 729     }
 730   else
 731     {
 732       fprintf (stderr, "insn uid %d not found\n", uid);
 733       return 0;
 734     }
 735 }
 736
 737 /* External entry point for printing a chain of insns
 738    starting with RTX_FIRST onto file OUTF.
 739    A blank line separates insns.
 740
 741    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 742
 743 void
 744 print_rtl (FILE *outf, const_rtx rtx_first)
 745 {
 746   const_rtx tmp_rtx;
 747
 748   outfile = outf;
 749   sawclose = 0;
 750
 751   if (rtx_first == 0)
 752     {
 753       fputs (print_rtx_head, outf);
 754       fputs ("(nil)\n", outf);
 755     }
 756   else
 757     switch (GET_CODE (rtx_first))
 758       {
 759       case INSN:
 760       case JUMP_INSN:
 761       case CALL_INSN:
 762       case NOTE:
 763       case CODE_LABEL:
 764       case BARRIER:
 765         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 766           {
 767             fputs (print_rtx_head, outfile);
 768             print_rtx (tmp_rtx);
 769             fprintf (outfile, "\n");
 770           }
 771         break;
 772
 773       default:
 774         fputs (print_rtx_head, outfile);
 775         print_rtx (rtx_first);
 776       }
 777 }
 778
 779 /* Like print_rtx, except specify a file.  */
 780 /* Return nonzero if we actually printed anything.  */
 781
 782 int
 783 print_rtl_single (FILE *outf, const_rtx x)
 784 {
 785   outfile = outf;
 786   sawclose = 0;
 787   fputs (print_rtx_head, outfile);
 788   print_rtx (x);
 789   putc ('\n', outf);
 790   return 1;
 791 }
 792
 793
 794 /* Like print_rtl except without all the detail; for example,
 795    if RTX is a CONST_INT then print in decimal format.  */
 796
 797 void
 798 print_simple_rtl (FILE *outf, const_rtx x)
 799 {
 800   flag_simple = 1;
 801   print_rtl (outf, x);
 802   flag_simple = 0;
 803 }