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 /* Nonzero means suppress output of instruction numbers
  62    in debugging dumps.
  63    This must be defined here so that programs like gencodes can be linked.  */
  64 int flag_dump_unnumbered = 0;
  65
  66 /* Nonzero means suppress output of instruction numbers for previous
  67    and next insns in debugging dumps.
  68    This must be defined here so that programs like gencodes can be linked.  */
  69 int flag_dump_unnumbered_links = 0;
  70
  71 /* Nonzero means use simplified format without flags, modes, etc.  */
  72 int flag_simple = 0;
  73
  74 /* Nonzero if we are dumping graphical description.  */
  75 int dump_for_graph;
  76
  77 #ifndef GENERATOR_FILE
  78 void
  79 print_mem_expr (FILE *outfile, const_tree expr)
  80 {
  81   fputc (' ', outfile);
  82   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  83 }
  84 #endif
  85
  86 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  87
  88 static void
  89 print_rtx (const_rtx in_rtx)
  90 {
  91   int i = 0;
  92   int j;
  93   const char *format_ptr;
  94   int is_insn;
  95
  96   if (sawclose)
  97     {
  98       if (flag_simple)
  99         fputc (' ', outfile);
 100       else
 101         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 102       sawclose = 0;
 103     }
 104
 105   if (in_rtx == 0)
 106     {
 107       fputs ("(nil)", outfile);
 108       sawclose = 1;
 109       return;
 110     }
 111   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 112     {
 113        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 114                 print_rtx_head, indent * 2, "");
 115        sawclose = 1;
 116        return;
 117     }
 118
 119   is_insn = INSN_P (in_rtx);
 120
 121   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 122      in separate nodes and therefore have to handle them special here.  */
 123   if (dump_for_graph
 124       && (is_insn || NOTE_P (in_rtx)
 125           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 126     {
 127       i = 3;
 128       indent = 0;
 129     }
 130   else
 131     {
 132       /* Print name of expression code.  */
 133       if (flag_simple && CONST_INT_P (in_rtx))
 134         fputc ('(', outfile);
 135       else
 136         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 137
 138       if (! flag_simple)
 139         {
 140           if (RTX_FLAG (in_rtx, in_struct))
 141             fputs ("/s", outfile);
 142
 143           if (RTX_FLAG (in_rtx, volatil))
 144             fputs ("/v", outfile);
 145
 146           if (RTX_FLAG (in_rtx, unchanging))
 147             fputs ("/u", outfile);
 148
 149           if (RTX_FLAG (in_rtx, frame_related))
 150             fputs ("/f", outfile);
 151
 152           if (RTX_FLAG (in_rtx, jump))
 153             fputs ("/j", outfile);
 154
 155           if (RTX_FLAG (in_rtx, call))
 156             fputs ("/c", outfile);
 157
 158           if (RTX_FLAG (in_rtx, return_val))
 159             fputs ("/i", outfile);
 160
 161           /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 162           if ((GET_CODE (in_rtx) == EXPR_LIST
 163                || GET_CODE (in_rtx) == INSN_LIST)
 164               && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 165             fprintf (outfile, ":%s",
 166                      GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 167
 168           /* For other rtl, print the mode if it's not VOID.  */
 169           else if (GET_MODE (in_rtx) != VOIDmode)
 170             fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 171
 172 #ifndef GENERATOR_FILE
 173           if (GET_CODE (in_rtx) == VAR_LOCATION)
 174             {
 175               if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 176                 fputs (" <debug string placeholder>", outfile);
 177               else
 178                 print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 179               fputc (' ', outfile);
 180               print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 181               if (PAT_VAR_LOCATION_STATUS (in_rtx)
 182                   == VAR_INIT_STATUS_UNINITIALIZED)
 183                 fprintf (outfile, " [uninit]");
 184               sawclose = 1;
 185               i = GET_RTX_LENGTH (VAR_LOCATION);
 186             }
 187 #endif
 188         }
 189     }
 190
 191 #ifndef GENERATOR_FILE
 192   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 193     i = 5;
 194 #endif
 195
 196   /* Get the format string and skip the first elements if we have handled
 197      them already.  */
 198   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 199   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 200     switch (*format_ptr++)
 201       {
 202         const char *str;
 203
 204       case 'T':
 205         str = XTMPL (in_rtx, i);
 206         goto string;
 207
 208       case 'S':
 209       case 's':
 210         str = XSTR (in_rtx, i);
 211       string:
 212
 213         if (str == 0)
 214           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 215         else
 216           {
 217             if (dump_for_graph)
 218               fprintf (outfile, " (\\\"%s\\\")", str);
 219             else
 220               fprintf (outfile, " (\"%s\")", str);
 221           }
 222         sawclose = 1;
 223         break;
 224
 225         /* 0 indicates a field for internal use that should not be printed.
 226            An exception is the third field of a NOTE, where it indicates
 227            that the field has several different valid contents.  */
 228       case '0':
 229         if (i == 1 && REG_P (in_rtx))
 230           {
 231             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 232               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 233           }
 234 #ifndef GENERATOR_FILE
 235         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 236           {
 237             int flags = SYMBOL_REF_FLAGS (in_rtx);
 238             if (flags)
 239               fprintf (outfile, " [flags %#x]", flags);
 240           }
 241         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 242           {
 243             tree decl = SYMBOL_REF_DECL (in_rtx);
 244             if (decl)
 245               print_node_brief (outfile, "", decl, dump_flags);
 246           }
 247 #endif
 248         else if (i == 4 && NOTE_P (in_rtx))
 249           {
 250             switch (NOTE_KIND (in_rtx))
 251               {
 252               case NOTE_INSN_EH_REGION_BEG:
 253               case NOTE_INSN_EH_REGION_END:
 254                 if (flag_dump_unnumbered)
 255                   fprintf (outfile, " #");
 256                 else
 257                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 258                 sawclose = 1;
 259                 break;
 260
 261               case NOTE_INSN_BLOCK_BEG:
 262               case NOTE_INSN_BLOCK_END:
 263 #ifndef GENERATOR_FILE
 264                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 265 #endif
 266                 sawclose = 1;
 267                 break;
 268
 269               case NOTE_INSN_BASIC_BLOCK:
 270                 {
 271 #ifndef GENERATOR_FILE
 272                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 273                   if (bb != 0)
 274                     fprintf (outfile, " [bb %d]", bb->index);
 275 #endif
 276                   break;
 277                 }
 278
 279               case NOTE_INSN_DELETED_LABEL:
 280                 {
 281                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 282                   if (label)
 283                     fprintf (outfile, " (\"%s\")", label);
 284                   else
 285                     fprintf (outfile, " \"\"");
 286                 }
 287                 break;
 288
 289               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 290                 {
 291 #ifndef GENERATOR_FILE
 292                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 293                   if (bb != 0)
 294                     fprintf (outfile, " [bb %d]", bb->index);
 295 #endif
 296                   break;
 297                 }
 298
 299               case NOTE_INSN_VAR_LOCATION:
 300 #ifndef GENERATOR_FILE
 301                 fputc (' ', outfile);
 302                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 303 #endif
 304                 break;
 305
 306               default:
 307                 break;
 308               }
 309           }
 310         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 311           /* Output the JUMP_LABEL reference.  */
 312           fprintf (outfile, "\n%s%*s -> %d", print_rtx_head, indent * 2, "",
 313                    INSN_UID (JUMP_LABEL (in_rtx)));
 314         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 315           {
 316 #ifndef GENERATOR_FILE
 317             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 318
 319             fprintf (outfile, " %u:%u", val->uid, val->hash);
 320             dump_addr (outfile, " @", in_rtx);
 321             dump_addr (outfile, "/", (void*)val);
 322 #endif
 323           }
 324         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 325           {
 326 #ifndef GENERATOR_FILE
 327             fprintf (outfile, " D#%i",
 328                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 329 #endif
 330           }
 331         break;
 332
 333       case 'e':
 334       do_e:
 335         indent += 2;
 336         if (i == 7 && INSN_P (in_rtx))
 337           /* Put REG_NOTES on their own line.  */
 338           fprintf (outfile, "\n%s%*s",
 339                    print_rtx_head, indent * 2, "");
 340         if (!sawclose)
 341           fprintf (outfile, " ");
 342         print_rtx (XEXP (in_rtx, i));
 343         indent -= 2;
 344         break;
 345
 346       case 'E':
 347       case 'V':
 348         indent += 2;
 349         if (sawclose)
 350           {
 351             fprintf (outfile, "\n%s%*s",
 352                      print_rtx_head, indent * 2, "");
 353             sawclose = 0;
 354           }
 355         fputs (" [", outfile);
 356         if (NULL != XVEC (in_rtx, i))
 357           {
 358             indent += 2;
 359             if (XVECLEN (in_rtx, i))
 360               sawclose = 1;
 361
 362             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 363               print_rtx (XVECEXP (in_rtx, i, j));
 364
 365             indent -= 2;
 366           }
 367         if (sawclose)
 368           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 369
 370         fputs ("]", outfile);
 371         sawclose = 1;
 372         indent -= 2;
 373         break;
 374
 375       case 'w':
 376         if (! flag_simple)
 377           fprintf (outfile, " ");
 378         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 379         if (! flag_simple)
 380           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 381                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 382         break;
 383
 384       case 'i':
 385         if (i == 5 && INSN_P (in_rtx))
 386           {
 387 #ifndef GENERATOR_FILE
 388             /*  Pretty-print insn locators.  Ignore scoping as it is mostly
 389                 redundant with line number information and do not print anything
 390                 when there is no location information available.  */
 391             if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
 392               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 393 #endif
 394           }
 395         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 396           {
 397 #ifndef GENERATOR_FILE
 398             fprintf (outfile, " %s:%i",
 399                      locator_file (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 400                      locator_line (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 401 #endif
 402           }
 403         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 404           {
 405 #ifndef GENERATOR_FILE
 406             fprintf (outfile, " %s:%i",
 407                      locator_file (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 408                      locator_line (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 409 #endif
 410           }
 411         else if (i == 6 && NOTE_P (in_rtx))
 412           {
 413             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 414                other times often contains garbage from INSN->NOTE death.  */
 415             if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL)
 416               fprintf (outfile, " %d",  XINT (in_rtx, i));
 417           }
 418 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 419         else if (i == 1
 420                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 421                  && XINT (in_rtx, 1) >= 0
 422                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 423           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 424 #endif
 425 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 426         else if (i == 1
 427                  && (GET_CODE (in_rtx) == UNSPEC
 428                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 429                  && XINT (in_rtx, 1) >= 0
 430                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 431           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 432 #endif
 433         else
 434           {
 435             int value = XINT (in_rtx, i);
 436             const char *name;
 437
 438 #ifndef GENERATOR_FILE
 439             if (REG_P (in_rtx) && value < FIRST_PSEUDO_REGISTER)
 440               fprintf (outfile, " %d %s", REGNO (in_rtx),
 441                        reg_names[REGNO (in_rtx)]);
 442             else if (REG_P (in_rtx)
 443                      && value <= LAST_VIRTUAL_REGISTER)
 444               {
 445                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 446                   fprintf (outfile, " %d virtual-incoming-args", value);
 447                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 448                   fprintf (outfile, " %d virtual-stack-vars", value);
 449                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 450                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 451                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 452                   fprintf (outfile, " %d virtual-outgoing-args", value);
 453                 else if (value == VIRTUAL_CFA_REGNUM)
 454                   fprintf (outfile, " %d virtual-cfa", value);
 455                 else
 456                   fprintf (outfile, " %d virtual-reg-%d", value,
 457                            value-FIRST_VIRTUAL_REGISTER);
 458               }
 459             else
 460 #endif
 461               if (flag_dump_unnumbered
 462                      && (is_insn || NOTE_P (in_rtx)))
 463               fputc ('#', outfile);
 464             else
 465               fprintf (outfile, " %d", value);
 466
 467 #ifndef GENERATOR_FILE
 468             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 469               {
 470                 fputs (" [", outfile);
 471                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 472                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 473                 if (REG_EXPR (in_rtx))
 474                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 475
 476                 if (REG_OFFSET (in_rtx))
 477                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 478                            REG_OFFSET (in_rtx));
 479                 fputs (" ]", outfile);
 480               }
 481 #endif
 482
 483             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 484                 && XINT (in_rtx, i) >= 0
 485                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 486               fprintf (outfile, " {%s}", name);
 487             sawclose = 0;
 488           }
 489         break;
 490
 491       /* Print NOTE_INSN names rather than integer codes.  */
 492
 493       case 'n':
 494         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 495         sawclose = 0;
 496         break;
 497
 498       case 'u':
 499         if (XEXP (in_rtx, i) != NULL)
 500           {
 501             rtx sub = XEXP (in_rtx, i);
 502             enum rtx_code subc = GET_CODE (sub);
 503
 504             if (GET_CODE (in_rtx) == LABEL_REF)
 505               {
 506                 if (subc == NOTE
 507                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 508                   {
 509                     if (flag_dump_unnumbered)
 510                       fprintf (outfile, " [# deleted]");
 511                     else
 512                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 513                     sawclose = 0;
 514                     break;
 515                   }
 516
 517                 if (subc != CODE_LABEL)
 518                   goto do_e;
 519               }
 520
 521             if (flag_dump_unnumbered
 522                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 523                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 524                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 525               fputs (" #", outfile);
 526             else
 527               fprintf (outfile, " %d", INSN_UID (sub));
 528           }
 529         else
 530           fputs (" 0", outfile);
 531         sawclose = 0;
 532         break;
 533
 534       case 't':
 535 #ifndef GENERATOR_FILE
 536         dump_addr (outfile, " ", XTREE (in_rtx, i));
 537 #endif
 538         break;
 539
 540       case '*':
 541         fputs (" Unknown", outfile);
 542         sawclose = 0;
 543         break;
 544
 545       case 'B':
 546 #ifndef GENERATOR_FILE
 547         if (XBBDEF (in_rtx, i))
 548           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 549 #endif
 550         break;
 551
 552       default:
 553         gcc_unreachable ();
 554       }
 555
 556   switch (GET_CODE (in_rtx))
 557     {
 558 #ifndef GENERATOR_FILE
 559     case MEM:
 560       if (__builtin_expect (final_insns_dump_p, false))
 561         fprintf (outfile, " [");
 562       else
 563         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 564                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 565
 566       if (MEM_EXPR (in_rtx))
 567         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 568
 569       if (MEM_OFFSET (in_rtx))
 570         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 571                  INTVAL (MEM_OFFSET (in_rtx)));
 572
 573       if (MEM_SIZE (in_rtx))
 574         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 575                  INTVAL (MEM_SIZE (in_rtx)));
 576
 577       if (MEM_ALIGN (in_rtx) != 1)
 578         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 579
 580       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 581         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 582
 583       fputc (']', outfile);
 584       break;
 585
 586     case CONST_DOUBLE:
 587       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 588         {
 589           char s[60];
 590
 591           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 592                            sizeof (s), 0, 1);
 593           fprintf (outfile, " %s", s);
 594
 595           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 596                                sizeof (s), 0, 1);
 597           fprintf (outfile, " [%s]", s);
 598         }
 599       break;
 600 #endif
 601
 602     case CODE_LABEL:
 603       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 604       switch (LABEL_KIND (in_rtx))
 605         {
 606           case LABEL_NORMAL: break;
 607           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 608           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 609           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 610           default: gcc_unreachable ();
 611         }
 612       break;
 613
 614     default:
 615       break;
 616     }
 617
 618   if (dump_for_graph
 619       && (is_insn || NOTE_P (in_rtx)
 620           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 621     sawclose = 0;
 622   else
 623     {
 624       fputc (')', outfile);
 625       sawclose = 1;
 626     }
 627 }
 628
 629 /* Print an rtx on the current line of FILE.  Initially indent IND
 630    characters.  */
 631
 632 void
 633 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 634 {
 635   int oldsaw = sawclose;
 636   int oldindent = indent;
 637
 638   sawclose = 0;
 639   indent = ind;
 640   outfile = outf;
 641   print_rtx (x);
 642   sawclose = oldsaw;
 643   indent = oldindent;
 644 }
 645
 646 /* Call this function from the debugger to see what X looks like.  */
 647
 648 DEBUG_FUNCTION void
 649 debug_rtx (const_rtx x)
 650 {
 651   outfile = stderr;
 652   sawclose = 0;
 653   print_rtx (x);
 654   fprintf (stderr, "\n");
 655 }
 656
 657 /* Count of rtx's to print with debug_rtx_list.
 658    This global exists because gdb user defined commands have no arguments.  */
 659
 660 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 661
 662 /* Call this function to print list from X on.
 663
 664    N is a count of the rtx's to print. Positive values print from the specified
 665    rtx on.  Negative values print a window around the rtx.
 666    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 667
 668 DEBUG_FUNCTION void
 669 debug_rtx_list (const_rtx x, int n)
 670 {
 671   int i,count;
 672   const_rtx insn;
 673
 674   count = n == 0 ? 1 : n < 0 ? -n : n;
 675
 676   /* If we are printing a window, back up to the start.  */
 677
 678   if (n < 0)
 679     for (i = count / 2; i > 0; i--)
 680       {
 681         if (PREV_INSN (x) == 0)
 682           break;
 683         x = PREV_INSN (x);
 684       }
 685
 686   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 687     {
 688       debug_rtx (insn);
 689       fprintf (stderr, "\n");
 690     }
 691 }
 692
 693 /* Call this function to print an rtx list from START to END inclusive.  */
 694
 695 DEBUG_FUNCTION void
 696 debug_rtx_range (const_rtx start, const_rtx end)
 697 {
 698   while (1)
 699     {
 700       debug_rtx (start);
 701       fprintf (stderr, "\n");
 702       if (!start || start == end)
 703         break;
 704       start = NEXT_INSN (start);
 705     }
 706 }
 707
 708 /* Call this function to search an rtx list to find one with insn uid UID,
 709    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 710    The found insn is returned to enable further debugging analysis.  */
 711
 712 DEBUG_FUNCTION const_rtx
 713 debug_rtx_find (const_rtx x, int uid)
 714 {
 715   while (x != 0 && INSN_UID (x) != uid)
 716     x = NEXT_INSN (x);
 717   if (x != 0)
 718     {
 719       debug_rtx_list (x, debug_rtx_count);
 720       return x;
 721     }
 722   else
 723     {
 724       fprintf (stderr, "insn uid %d not found\n", uid);
 725       return 0;
 726     }
 727 }
 728
 729 /* External entry point for printing a chain of insns
 730    starting with RTX_FIRST onto file OUTF.
 731    A blank line separates insns.
 732
 733    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 734
 735 void
 736 print_rtl (FILE *outf, const_rtx rtx_first)
 737 {
 738   const_rtx tmp_rtx;
 739
 740   outfile = outf;
 741   sawclose = 0;
 742
 743   if (rtx_first == 0)
 744     {
 745       fputs (print_rtx_head, outf);
 746       fputs ("(nil)\n", outf);
 747     }
 748   else
 749     switch (GET_CODE (rtx_first))
 750       {
 751       case INSN:
 752       case JUMP_INSN:
 753       case CALL_INSN:
 754       case NOTE:
 755       case CODE_LABEL:
 756       case BARRIER:
 757         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 758           {
 759             fputs (print_rtx_head, outfile);
 760             print_rtx (tmp_rtx);
 761             fprintf (outfile, "\n");
 762           }
 763         break;
 764
 765       default:
 766         fputs (print_rtx_head, outfile);
 767         print_rtx (rtx_first);
 768       }
 769 }
 770
 771 /* Like print_rtx, except specify a file.  */
 772 /* Return nonzero if we actually printed anything.  */
 773
 774 int
 775 print_rtl_single (FILE *outf, const_rtx x)
 776 {
 777   outfile = outf;
 778   sawclose = 0;
 779   fputs (print_rtx_head, outfile);
 780   print_rtx (x);
 781   putc ('\n', outf);
 782   return 1;
 783 }
 784
 785
 786 /* Like print_rtl except without all the detail; for example,
 787    if RTX is a CONST_INT then print in decimal format.  */
 788
 789 void
 790 print_simple_rtl (FILE *outf, const_rtx x)
 791 {
 792   flag_simple = 1;
 793   print_rtl (outf, x);
 794   flag_simple = 0;
 795 }