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 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 #endif
 490
 491             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 492                 && XINT (in_rtx, i) >= 0
 493                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 494               fprintf (outfile, " {%s}", name);
 495             sawclose = 0;
 496           }
 497         break;
 498
 499       /* Print NOTE_INSN names rather than integer codes.  */
 500
 501       case 'n':
 502         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 503         sawclose = 0;
 504         break;
 505
 506       case 'u':
 507         if (XEXP (in_rtx, i) != NULL)
 508           {
 509             rtx sub = XEXP (in_rtx, i);
 510             enum rtx_code subc = GET_CODE (sub);
 511
 512             if (GET_CODE (in_rtx) == LABEL_REF)
 513               {
 514                 if (subc == NOTE
 515                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 516                   {
 517                     if (flag_dump_unnumbered)
 518                       fprintf (outfile, " [# deleted]");
 519                     else
 520                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 521                     sawclose = 0;
 522                     break;
 523                   }
 524
 525                 if (subc != CODE_LABEL)
 526                   goto do_e;
 527               }
 528
 529             if (flag_dump_unnumbered
 530                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 531                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 532                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 533               fputs (" #", outfile);
 534             else
 535               fprintf (outfile, " %d", INSN_UID (sub));
 536           }
 537         else
 538           fputs (" 0", outfile);
 539         sawclose = 0;
 540         break;
 541
 542       case 't':
 543 #ifndef GENERATOR_FILE
 544         if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
 545           print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
 546         else
 547           dump_addr (outfile, " ", XTREE (in_rtx, i));
 548 #endif
 549         break;
 550
 551       case '*':
 552         fputs (" Unknown", outfile);
 553         sawclose = 0;
 554         break;
 555
 556       case 'B':
 557 #ifndef GENERATOR_FILE
 558         if (XBBDEF (in_rtx, i))
 559           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 560 #endif
 561         break;
 562
 563       default:
 564         gcc_unreachable ();
 565       }
 566
 567   switch (GET_CODE (in_rtx))
 568     {
 569 #ifndef GENERATOR_FILE
 570     case MEM:
 571       if (__builtin_expect (final_insns_dump_p, false))
 572         fprintf (outfile, " [");
 573       else
 574         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 575                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 576
 577       if (MEM_EXPR (in_rtx))
 578         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 579
 580       if (MEM_OFFSET (in_rtx))
 581         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 582                  INTVAL (MEM_OFFSET (in_rtx)));
 583
 584       if (MEM_SIZE (in_rtx))
 585         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 586                  INTVAL (MEM_SIZE (in_rtx)));
 587
 588       if (MEM_ALIGN (in_rtx) != 1)
 589         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 590
 591       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 592         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 593
 594       fputc (']', outfile);
 595       break;
 596
 597     case CONST_DOUBLE:
 598       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 599         {
 600           char s[60];
 601
 602           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 603                            sizeof (s), 0, 1);
 604           fprintf (outfile, " %s", s);
 605
 606           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 607                                sizeof (s), 0, 1);
 608           fprintf (outfile, " [%s]", s);
 609         }
 610       break;
 611 #endif
 612
 613     case CODE_LABEL:
 614       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 615       switch (LABEL_KIND (in_rtx))
 616         {
 617           case LABEL_NORMAL: break;
 618           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 619           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 620           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 621           default: gcc_unreachable ();
 622         }
 623       break;
 624
 625     default:
 626       break;
 627     }
 628
 629   if (dump_for_graph
 630       && (is_insn || NOTE_P (in_rtx)
 631           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 632     sawclose = 0;
 633   else
 634     {
 635       fputc (')', outfile);
 636       sawclose = 1;
 637     }
 638 }
 639
 640 /* Print an rtx on the current line of FILE.  Initially indent IND
 641    characters.  */
 642
 643 void
 644 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 645 {
 646   int oldsaw = sawclose;
 647   int oldindent = indent;
 648
 649   sawclose = 0;
 650   indent = ind;
 651   outfile = outf;
 652   print_rtx (x);
 653   sawclose = oldsaw;
 654   indent = oldindent;
 655 }
 656
 657 /* Call this function from the debugger to see what X looks like.  */
 658
 659 DEBUG_FUNCTION void
 660 debug_rtx (const_rtx x)
 661 {
 662   outfile = stderr;
 663   sawclose = 0;
 664   print_rtx (x);
 665   fprintf (stderr, "\n");
 666 }
 667
 668 /* Count of rtx's to print with debug_rtx_list.
 669    This global exists because gdb user defined commands have no arguments.  */
 670
 671 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 672
 673 /* Call this function to print list from X on.
 674
 675    N is a count of the rtx's to print. Positive values print from the specified
 676    rtx on.  Negative values print a window around the rtx.
 677    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 678
 679 DEBUG_FUNCTION void
 680 debug_rtx_list (const_rtx x, int n)
 681 {
 682   int i,count;
 683   const_rtx insn;
 684
 685   count = n == 0 ? 1 : n < 0 ? -n : n;
 686
 687   /* If we are printing a window, back up to the start.  */
 688
 689   if (n < 0)
 690     for (i = count / 2; i > 0; i--)
 691       {
 692         if (PREV_INSN (x) == 0)
 693           break;
 694         x = PREV_INSN (x);
 695       }
 696
 697   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 698     {
 699       debug_rtx (insn);
 700       fprintf (stderr, "\n");
 701     }
 702 }
 703
 704 /* Call this function to print an rtx list from START to END inclusive.  */
 705
 706 DEBUG_FUNCTION void
 707 debug_rtx_range (const_rtx start, const_rtx end)
 708 {
 709   while (1)
 710     {
 711       debug_rtx (start);
 712       fprintf (stderr, "\n");
 713       if (!start || start == end)
 714         break;
 715       start = NEXT_INSN (start);
 716     }
 717 }
 718
 719 /* Call this function to search an rtx list to find one with insn uid UID,
 720    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 721    The found insn is returned to enable further debugging analysis.  */
 722
 723 DEBUG_FUNCTION const_rtx
 724 debug_rtx_find (const_rtx x, int uid)
 725 {
 726   while (x != 0 && INSN_UID (x) != uid)
 727     x = NEXT_INSN (x);
 728   if (x != 0)
 729     {
 730       debug_rtx_list (x, debug_rtx_count);
 731       return x;
 732     }
 733   else
 734     {
 735       fprintf (stderr, "insn uid %d not found\n", uid);
 736       return 0;
 737     }
 738 }
 739
 740 /* External entry point for printing a chain of insns
 741    starting with RTX_FIRST onto file OUTF.
 742    A blank line separates insns.
 743
 744    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 745
 746 void
 747 print_rtl (FILE *outf, const_rtx rtx_first)
 748 {
 749   const_rtx tmp_rtx;
 750
 751   outfile = outf;
 752   sawclose = 0;
 753
 754   if (rtx_first == 0)
 755     {
 756       fputs (print_rtx_head, outf);
 757       fputs ("(nil)\n", outf);
 758     }
 759   else
 760     switch (GET_CODE (rtx_first))
 761       {
 762       case INSN:
 763       case JUMP_INSN:
 764       case CALL_INSN:
 765       case NOTE:
 766       case CODE_LABEL:
 767       case BARRIER:
 768         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 769           {
 770             fputs (print_rtx_head, outfile);
 771             print_rtx (tmp_rtx);
 772             fprintf (outfile, "\n");
 773           }
 774         break;
 775
 776       default:
 777         fputs (print_rtx_head, outfile);
 778         print_rtx (rtx_first);
 779       }
 780 }
 781
 782 /* Like print_rtx, except specify a file.  */
 783 /* Return nonzero if we actually printed anything.  */
 784
 785 int
 786 print_rtl_single (FILE *outf, const_rtx x)
 787 {
 788   outfile = outf;
 789   sawclose = 0;
 790   fputs (print_rtx_head, outfile);
 791   print_rtx (x);
 792   putc ('\n', outf);
 793   return 1;
 794 }
 795
 796
 797 /* Like print_rtl except without all the detail; for example,
 798    if RTX is a CONST_INT then print in decimal format.  */
 799
 800 void
 801 print_simple_rtl (FILE *outf, const_rtx x)
 802 {
 803   flag_simple = 1;
 804   print_rtl (outf, x);
 805   flag_simple = 0;
 806 }