gcc/print-rtl.c

   1 /* Print RTL for GNU C Compiler.
   2    Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "rtl.h"
  26
  27 /* We don't want the tree code checking code for the access to the
  28    DECL_NAME to be included in the gen* programs.  */
  29 #undef ENABLE_TREE_CHECKING
  30 #include "tree.h"
  31 #include "real.h"
  32 #include "flags.h"
  33 #include "hard-reg-set.h"
  34 #include "basic-block.h"
  35
  36 /* How to print out a register name.
  37    We don't use PRINT_REG because some definitions of PRINT_REG
  38    don't work here.  */
  39 #ifndef DEBUG_PRINT_REG
  40 #define DEBUG_PRINT_REG(RTX, CODE, FILE) \
  41   fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)])
  42 #endif
  43
  44 /* Array containing all of the register names */
  45
  46 #ifdef DEBUG_REGISTER_NAMES
  47 static const char * const debug_reg_names[] = DEBUG_REGISTER_NAMES;
  48 #define reg_names debug_reg_names
  49 #else
  50 const char * reg_names[] = REGISTER_NAMES;
  51 #endif
  52
  53 static FILE *outfile;
  54
  55 static int sawclose = 0;
  56
  57 static int indent;
  58
  59 static void print_rtx           PARAMS ((rtx));
  60
  61 /* String printed at beginning of each RTL when it is dumped.
  62    This string is set to ASM_COMMENT_START when the RTL is dumped in
  63    the assembly output file.  */
  64 const char *print_rtx_head = "";
  65
  66 /* Nonzero means suppress output of instruction numbers and line number
  67    notes in debugging dumps.
  68    This must be defined here so that programs like gencodes can be linked.  */
  69 int flag_dump_unnumbered = 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 /* Nonzero to dump all call_placeholder alternatives.  */
  78 static int debug_call_placeholder_verbose;
  79
  80 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  81
  82 static void
  83 print_rtx (in_rtx)
  84      rtx in_rtx;
  85 {
  86   int i = 0;
  87   int j;
  88   const char *format_ptr;
  89   int is_insn;
  90   rtx tem;
  91
  92   if (sawclose)
  93     {
  94       if (flag_simple)
  95         fputc (' ', outfile);
  96       else
  97         fprintf (outfile, "\n%s%*s",
  98                  print_rtx_head, indent * 2, "");
  99       sawclose = 0;
 100     }
 101
 102   if (in_rtx == 0)
 103     {
 104       fputs ("(nil)", outfile);
 105       sawclose = 1;
 106       return;
 107     }
 108
 109   is_insn = (INSN_P (in_rtx));
 110
 111   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 112      in separate nodes and therefore have to handle them special here.  */
 113   if (dump_for_graph &&
 114       (is_insn || GET_CODE (in_rtx) == NOTE || GET_CODE (in_rtx) == CODE_LABEL
 115        || GET_CODE (in_rtx) == BARRIER))
 116     {
 117       i = 3;
 118       indent = 0;
 119     }
 120   else
 121     {
 122       /* print name of expression code */
 123       if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
 124         fputc ('(', outfile);
 125       else
 126         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 127
 128       if (! flag_simple)
 129         {
 130           if (in_rtx->in_struct)
 131             fputs ("/s", outfile);
 132
 133           if (in_rtx->volatil)
 134             fputs ("/v", outfile);
 135
 136           if (in_rtx->unchanging)
 137             fputs ("/u", outfile);
 138
 139           if (in_rtx->integrated)
 140             fputs ("/i", outfile);
 141
 142           if (in_rtx->frame_related)
 143             fputs ("/f", outfile);
 144
 145           if (in_rtx->jump)
 146             fputs ("/j", outfile);
 147
 148           if (in_rtx->call)
 149             fputs ("/c", outfile);
 150
 151           if (GET_MODE (in_rtx) != VOIDmode)
 152             {
 153               /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 154               if (GET_CODE (in_rtx) == EXPR_LIST
 155                   || GET_CODE (in_rtx) == INSN_LIST)
 156                 fprintf (outfile, ":%s",
 157                          GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 158               else
 159                 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 160             }
 161         }
 162     }
 163
 164   /* Get the format string and skip the first elements if we have handled
 165      them already.  */
 166   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 167
 168   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 169     switch (*format_ptr++)
 170       {
 171         const char *str;
 172
 173       case 'T':
 174         str = XTMPL (in_rtx, i);
 175         goto string;
 176
 177       case 'S':
 178       case 's':
 179         str = XSTR (in_rtx, i);
 180       string:
 181
 182         if (str == 0)
 183           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 184         else
 185           {
 186             if (dump_for_graph)
 187               fprintf (outfile, " (\\\"%s\\\")", str);
 188             else
 189               fprintf (outfile, " (\"%s\")", str);
 190           }
 191         sawclose = 1;
 192         break;
 193
 194         /* 0 indicates a field for internal use that should not be printed.
 195            An exception is the third field of a NOTE, where it indicates
 196            that the field has several different valid contents.  */
 197       case '0':
 198         if (i == 1 && GET_CODE (in_rtx) == REG)
 199           {
 200             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 201               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 202             break;
 203           }
 204         if (i == 3 && GET_CODE (in_rtx) == NOTE)
 205           {
 206             switch (NOTE_LINE_NUMBER (in_rtx))
 207               {
 208               case NOTE_INSN_EH_REGION_BEG:
 209               case NOTE_INSN_EH_REGION_END:
 210                 if (flag_dump_unnumbered)
 211                   fprintf (outfile, " #");
 212                 else
 213                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 214                 sawclose = 1;
 215                 break;
 216
 217               case NOTE_INSN_BLOCK_BEG:
 218               case NOTE_INSN_BLOCK_END:
 219                 fprintf (outfile, " ");
 220                 if (flag_dump_unnumbered)
 221                   fprintf (outfile, "#");
 222                 else
 223                   fprintf (outfile, HOST_PTR_PRINTF,
 224                            (char *) NOTE_BLOCK (in_rtx));
 225                 sawclose = 1;
 226                 break;
 227
 228               case NOTE_INSN_RANGE_BEG:
 229               case NOTE_INSN_RANGE_END:
 230               case NOTE_INSN_LIVE:
 231                 indent += 2;
 232                 if (!sawclose)
 233                   fprintf (outfile, " ");
 234                 print_rtx (NOTE_RANGE_INFO (in_rtx));
 235                 indent -= 2;
 236                 break;
 237
 238               case NOTE_INSN_BASIC_BLOCK:
 239                 {
 240                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 241                   if (bb != 0)
 242                     fprintf (outfile, " [bb %d]", bb->index);
 243                   break;
 244                 }
 245
 246               case NOTE_INSN_EXPECTED_VALUE:
 247                 indent += 2;
 248                 if (!sawclose)
 249                   fprintf (outfile, " ");
 250                 print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
 251                 indent -= 2;
 252                 break;
 253
 254               case NOTE_INSN_DELETED_LABEL:
 255                 if (NOTE_SOURCE_FILE (in_rtx))
 256                   fprintf (outfile, " (\"%s\")", NOTE_SOURCE_FILE (in_rtx));
 257                 else
 258                   fprintf (outfile, " \"\"");
 259                 break;
 260
 261               default:
 262                 {
 263                   const char * const str = X0STR (in_rtx, i);
 264
 265                   if (NOTE_LINE_NUMBER (in_rtx) < 0)
 266                     ;
 267                   else if (str == 0)
 268                     fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 269                   else
 270                     {
 271                       if (dump_for_graph)
 272                         fprintf (outfile, " (\\\"%s\\\")", str);
 273                       else
 274                         fprintf (outfile, " (\"%s\")", str);
 275                     }
 276                   break;
 277                 }
 278               }
 279           }
 280         break;
 281
 282       case 'e':
 283       do_e:
 284         indent += 2;
 285         if (!sawclose)
 286           fprintf (outfile, " ");
 287         print_rtx (XEXP (in_rtx, i));
 288         indent -= 2;
 289         break;
 290
 291       case 'E':
 292       case 'V':
 293         indent += 2;
 294         if (sawclose)
 295           {
 296             fprintf (outfile, "\n%s%*s",
 297                      print_rtx_head, indent * 2, "");
 298             sawclose = 0;
 299           }
 300         fputs ("[ ", outfile);
 301         if (NULL != XVEC (in_rtx, i))
 302           {
 303             indent += 2;
 304             if (XVECLEN (in_rtx, i))
 305               sawclose = 1;
 306
 307             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 308               print_rtx (XVECEXP (in_rtx, i, j));
 309
 310             indent -= 2;
 311           }
 312         if (sawclose)
 313           fprintf (outfile, "\n%s%*s",
 314                    print_rtx_head, indent * 2, "");
 315
 316         fputs ("] ", outfile);
 317         sawclose = 1;
 318         indent -= 2;
 319         break;
 320
 321       case 'w':
 322         if (! flag_simple)
 323           fprintf (outfile, " ");
 324         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 325         if (! flag_simple)
 326           {
 327             fprintf (outfile, " [");
 328             fprintf (outfile, HOST_WIDE_INT_PRINT_HEX, XWINT (in_rtx, i));
 329             fprintf (outfile, "]");
 330           }
 331         break;
 332
 333       case 'i':
 334         if (i == 5 && GET_CODE (in_rtx) == NOTE)
 335           {
 336             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 337                other times often contains garbage from INSN->NOTE death.  */
 338             if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
 339               fprintf (outfile, " %d",  XINT (in_rtx, i));
 340           }
 341         else
 342           {
 343             int value = XINT (in_rtx, i);
 344             const char *name;
 345
 346             if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
 347               {
 348                 fputc (' ', outfile);
 349                 DEBUG_PRINT_REG (in_rtx, 0, outfile);
 350               }
 351             else if (GET_CODE (in_rtx) == REG
 352                      && value <= LAST_VIRTUAL_REGISTER)
 353               {
 354                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 355                   fprintf (outfile, " %d virtual-incoming-args", value);
 356                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 357                   fprintf (outfile, " %d virtual-stack-vars", value);
 358                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 359                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 360                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 361                   fprintf (outfile, " %d virtual-outgoing-args", value);
 362                 else if (value == VIRTUAL_CFA_REGNUM)
 363                   fprintf (outfile, " %d virtual-cfa", value);
 364                 else
 365                   fprintf (outfile, " %d virtual-reg-%d", value,
 366                            value-FIRST_VIRTUAL_REGISTER);
 367               }
 368             else if (flag_dump_unnumbered
 369                      && (is_insn || GET_CODE (in_rtx) == NOTE))
 370               fputc ('#', outfile);
 371             else
 372               fprintf (outfile, " %d", value);
 373
 374             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 375                 && XINT (in_rtx, i) >= 0
 376                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 377               fprintf (outfile, " {%s}", name);
 378             sawclose = 0;
 379           }
 380         break;
 381
 382       /* Print NOTE_INSN names rather than integer codes.  */
 383
 384       case 'n':
 385         if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
 386             && XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
 387           fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 388         else
 389           fprintf (outfile, " %d", XINT (in_rtx, i));
 390         sawclose = 0;
 391         break;
 392
 393       case 'u':
 394         if (XEXP (in_rtx, i) != NULL)
 395           {
 396             rtx sub = XEXP (in_rtx, i);
 397             enum rtx_code subc = GET_CODE (sub);
 398
 399             if (GET_CODE (in_rtx) == LABEL_REF)
 400               {
 401                 if (subc == NOTE
 402                     && NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
 403                   {
 404                     if (flag_dump_unnumbered)
 405                       fprintf (outfile, " [# deleted]");
 406                     else
 407                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 408                     sawclose = 0;
 409                     break;
 410                   }
 411
 412                 if (subc != CODE_LABEL)
 413                   goto do_e;
 414               }
 415
 416             if (flag_dump_unnumbered)
 417               fputs (" #", outfile);
 418             else
 419               fprintf (outfile, " %d", INSN_UID (sub));
 420           }
 421         else
 422           fputs (" 0", outfile);
 423         sawclose = 0;
 424         break;
 425
 426       case 'b':
 427         if (XBITMAP (in_rtx, i) == NULL)
 428           fputs (" {null}", outfile);
 429         else
 430           bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
 431         sawclose = 0;
 432         break;
 433
 434       case 't':
 435         putc (' ', outfile);
 436         fprintf (outfile, HOST_PTR_PRINTF, (char *) XTREE (in_rtx, i));
 437         break;
 438
 439       case '*':
 440         fputs (" Unknown", outfile);
 441         sawclose = 0;
 442         break;
 443
 444       default:
 445         fprintf (stderr,
 446                  "switch format wrong in rtl.print_rtx(). format was: %c.\n",
 447                  format_ptr[-1]);
 448         abort ();
 449       }
 450
 451   switch (GET_CODE (in_rtx))
 452     {
 453     case MEM:
 454       fputs (" [", outfile);
 455       fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
 456       if (MEM_DECL (in_rtx) && DECL_NAME (MEM_DECL (in_rtx)))
 457         fprintf (outfile, " %s",
 458                  IDENTIFIER_POINTER (DECL_NAME (MEM_DECL (in_rtx))));
 459
 460       if (MEM_OFFSET (in_rtx))
 461         {
 462           fputc ('+', outfile);
 463           fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 464                    INTVAL (MEM_OFFSET (in_rtx)));
 465         }
 466
 467       if (MEM_SIZE (in_rtx))
 468         {
 469           fputs (" S", outfile);
 470           fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 471                    INTVAL (MEM_SIZE (in_rtx)));
 472         }
 473
 474       if (MEM_ALIGN (in_rtx) != 1)
 475         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 476
 477       fputc (']', outfile);
 478       break;
 479
 480 #if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT && MAX_LONG_DOUBLE_TYPE_SIZE == 64
 481     case CONST_DOUBLE:
 482       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 483         {
 484           double val;
 485           REAL_VALUE_FROM_CONST_DOUBLE (val, in_rtx);
 486           fprintf (outfile, " [%.16g]", val);
 487         }
 488       break;
 489 #endif
 490
 491     case CODE_LABEL:
 492       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 493       if (LABEL_ALTERNATE_NAME (in_rtx))
 494         fprintf (outfile, " [alternate name: %s]",
 495                  LABEL_ALTERNATE_NAME (in_rtx));
 496       break;
 497
 498     case CALL_PLACEHOLDER:
 499       if (debug_call_placeholder_verbose)
 500         {
 501           fputs (" (cond [\n  (const_string \"normal\") (sequence [", outfile);
 502           for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 503             {
 504               fputs ("\n    ", outfile);
 505               print_inline_rtx (outfile, tem, 4);
 506             }
 507
 508           tem = XEXP (in_rtx, 1);
 509           if (tem)
 510             fputs ("\n    ])\n  (const_string \"tail_call\") (sequence [", outfile);
 511           for (; tem != 0; tem = NEXT_INSN (tem))
 512             {
 513               fputs ("\n    ", outfile);
 514               print_inline_rtx (outfile, tem, 4);
 515             }
 516
 517           tem = XEXP (in_rtx, 2);
 518           if (tem)
 519             fputs ("\n    ])\n  (const_string \"tail_recursion\") (sequence [", outfile);
 520           for (; tem != 0; tem = NEXT_INSN (tem))
 521             {
 522               fputs ("\n    ", outfile);
 523               print_inline_rtx (outfile, tem, 4);
 524             }
 525
 526           fputs ("\n    ])\n  ])", outfile);
 527           break;
 528         }
 529
 530       for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 531         if (GET_CODE (tem) == CALL_INSN)
 532           {
 533             fprintf (outfile, " ");
 534             print_rtx (tem);
 535             break;
 536           }
 537       break;
 538
 539     default:
 540       break;
 541     }
 542
 543   if (dump_for_graph
 544       && (is_insn || GET_CODE (in_rtx) == NOTE
 545           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 546     sawclose = 0;
 547   else
 548     {
 549       fputc (')', outfile);
 550       sawclose = 1;
 551     }
 552 }
 553
 554 /* Print an rtx on the current line of FILE.  Initially indent IND
 555    characters.  */
 556
 557 void
 558 print_inline_rtx (outf, x, ind)
 559      FILE *outf;
 560      rtx x;
 561      int ind;
 562 {
 563   int oldsaw = sawclose;
 564   int oldindent = indent;
 565
 566   sawclose = 0;
 567   indent = ind;
 568   outfile = outf;
 569   print_rtx (x);
 570   sawclose = oldsaw;
 571   indent = oldindent;
 572 }
 573
 574 /* Call this function from the debugger to see what X looks like.  */
 575
 576 void
 577 debug_rtx (x)
 578      rtx x;
 579 {
 580   outfile = stderr;
 581   print_rtx (x);
 582   fprintf (stderr, "\n");
 583 }
 584
 585 /* Count of rtx's to print with debug_rtx_list.
 586    This global exists because gdb user defined commands have no arguments.  */
 587
 588 int debug_rtx_count = 0;        /* 0 is treated as equivalent to 1 */
 589
 590 /* Call this function to print list from X on.
 591
 592    N is a count of the rtx's to print. Positive values print from the specified
 593    rtx on.  Negative values print a window around the rtx.
 594    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 595
 596 void
 597 debug_rtx_list (x, n)
 598      rtx x;
 599      int n;
 600 {
 601   int i,count;
 602   rtx insn;
 603
 604   count = n == 0 ? 1 : n < 0 ? -n : n;
 605
 606   /* If we are printing a window, back up to the start.  */
 607
 608   if (n < 0)
 609     for (i = count / 2; i > 0; i--)
 610       {
 611         if (PREV_INSN (x) == 0)
 612           break;
 613         x = PREV_INSN (x);
 614       }
 615
 616   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 617     debug_rtx (insn);
 618 }
 619
 620 /* Call this function to print an rtx list from START to END inclusive.  */
 621
 622 void
 623 debug_rtx_range (start, end)
 624      rtx start, end;
 625 {
 626   while (1)
 627     {
 628       debug_rtx (start);
 629       if (!start || start == end)
 630         break;
 631       start = NEXT_INSN (start);
 632     }
 633 }
 634
 635 /* Call this function to search an rtx list to find one with insn uid UID,
 636    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 637    The found insn is returned to enable further debugging analysis.  */
 638
 639 rtx
 640 debug_rtx_find (x, uid)
 641      rtx x;
 642      int uid;
 643 {
 644   while (x != 0 && INSN_UID (x) != uid)
 645     x = NEXT_INSN (x);
 646   if (x != 0)
 647     {
 648       debug_rtx_list (x, debug_rtx_count);
 649       return x;
 650     }
 651   else
 652     {
 653       fprintf (stderr, "insn uid %d not found\n", uid);
 654       return 0;
 655     }
 656 }
 657
 658 /* External entry point for printing a chain of insns
 659    starting with RTX_FIRST onto file OUTF.
 660    A blank line separates insns.
 661
 662    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 663
 664 void
 665 print_rtl (outf, rtx_first)
 666      FILE *outf;
 667      rtx rtx_first;
 668 {
 669   rtx tmp_rtx;
 670
 671   outfile = outf;
 672   sawclose = 0;
 673
 674   if (rtx_first == 0)
 675     {
 676       fputs (print_rtx_head, outf);
 677       fputs ("(nil)\n", outf);
 678     }
 679   else
 680     switch (GET_CODE (rtx_first))
 681       {
 682       case INSN:
 683       case JUMP_INSN:
 684       case CALL_INSN:
 685       case NOTE:
 686       case CODE_LABEL:
 687       case BARRIER:
 688         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 689           if (! flag_dump_unnumbered
 690               || GET_CODE (tmp_rtx) != NOTE || NOTE_LINE_NUMBER (tmp_rtx) < 0)
 691             {
 692               fputs (print_rtx_head, outfile);
 693               print_rtx (tmp_rtx);
 694               fprintf (outfile, "\n");
 695             }
 696         break;
 697
 698       default:
 699         fputs (print_rtx_head, outfile);
 700         print_rtx (rtx_first);
 701       }
 702 }
 703
 704 /* Like print_rtx, except specify a file.  */
 705 /* Return nonzero if we actually printed anything.  */
 706
 707 int
 708 print_rtl_single (outf, x)
 709      FILE *outf;
 710      rtx x;
 711 {
 712   outfile = outf;
 713   sawclose = 0;
 714   if (! flag_dump_unnumbered
 715       || GET_CODE (x) != NOTE || NOTE_LINE_NUMBER (x) < 0)
 716     {
 717       fputs (print_rtx_head, outfile);
 718       print_rtx (x);
 719       putc ('\n', outf);
 720       return 1;
 721     }
 722   return 0;
 723 }
 724
 725
 726 /* Like print_rtl except without all the detail; for example,
 727    if RTX is a CONST_INT then print in decimal format.  */
 728
 729 void
 730 print_simple_rtl (outf, x)
 731      FILE *outf;
 732      rtx x;
 733 {
 734   flag_simple = 1;
 735   print_rtl (outf, x);
 736   flag_simple = 0;
 737 }