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 void
  81 print_mem_expr (outfile, expr)
  82      FILE *outfile;
  83      tree expr;
  84 {
  85   if (TREE_CODE (expr) == COMPONENT_REF)
  86     {
  87       if (TREE_OPERAND (expr, 0))
  88         print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  89       else
  90         fputs (" <variable>", outfile);
  91       if (DECL_NAME (TREE_OPERAND (expr, 1)))
  92         fprintf (outfile, ".%s",
  93                  IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
  94     }
  95   else if (DECL_NAME (expr))
  96     fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
  97   else if (TREE_CODE (expr) == RESULT_DECL)
  98     fputs (" <result>", outfile);
  99   else
 100     fputs (" <anonymous>", outfile);
 101 }
 102
 103 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
 104
 105 static void
 106 print_rtx (in_rtx)
 107      rtx in_rtx;
 108 {
 109   int i = 0;
 110   int j;
 111   const char *format_ptr;
 112   int is_insn;
 113   rtx tem;
 114
 115   if (sawclose)
 116     {
 117       if (flag_simple)
 118         fputc (' ', outfile);
 119       else
 120         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 121       sawclose = 0;
 122     }
 123
 124   if (in_rtx == 0)
 125     {
 126       fputs ("(nil)", outfile);
 127       sawclose = 1;
 128       return;
 129     }
 130   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 131     {
 132        fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
 133        sawclose = 1;
 134        return;
 135     }
 136
 137   is_insn = INSN_P (in_rtx);
 138
 139   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 140      in separate nodes and therefore have to handle them special here.  */
 141   if (dump_for_graph
 142       && (is_insn || GET_CODE (in_rtx) == NOTE
 143           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 144     {
 145       i = 3;
 146       indent = 0;
 147     }
 148   else
 149     {
 150       /* Print name of expression code.  */
 151       if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
 152         fputc ('(', outfile);
 153       else
 154         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 155
 156       if (! flag_simple)
 157         {
 158           if (RTX_FLAG (in_rtx, in_struct))
 159             fputs ("/s", outfile);
 160
 161           if (RTX_FLAG (in_rtx, volatil))
 162             fputs ("/v", outfile);
 163
 164           if (RTX_FLAG (in_rtx, unchanging))
 165             fputs ("/u", outfile);
 166
 167           if (RTX_FLAG (in_rtx, integrated))
 168             fputs ("/i", outfile);
 169
 170           if (RTX_FLAG (in_rtx, frame_related))
 171             fputs ("/f", outfile);
 172
 173           if (RTX_FLAG (in_rtx, jump))
 174             fputs ("/j", outfile);
 175
 176           if (RTX_FLAG (in_rtx, call))
 177             fputs ("/c", outfile);
 178
 179           if (GET_MODE (in_rtx) != VOIDmode)
 180             {
 181               /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 182               if (GET_CODE (in_rtx) == EXPR_LIST
 183                   || GET_CODE (in_rtx) == INSN_LIST)
 184                 fprintf (outfile, ":%s",
 185                          GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 186               else
 187                 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 188             }
 189         }
 190     }
 191
 192   /* Get the format string and skip the first elements if we have handled
 193      them already.  */
 194   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 195   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 196     switch (*format_ptr++)
 197       {
 198         const char *str;
 199
 200       case 'T':
 201         str = XTMPL (in_rtx, i);
 202         goto string;
 203
 204       case 'S':
 205       case 's':
 206         str = XSTR (in_rtx, i);
 207       string:
 208
 209         if (str == 0)
 210           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 211         else
 212           {
 213             if (dump_for_graph)
 214               fprintf (outfile, " (\\\"%s\\\")", str);
 215             else
 216               fprintf (outfile, " (\"%s\")", str);
 217           }
 218         sawclose = 1;
 219         break;
 220
 221         /* 0 indicates a field for internal use that should not be printed.
 222            An exception is the third field of a NOTE, where it indicates
 223            that the field has several different valid contents.  */
 224       case '0':
 225         if (i == 1 && GET_CODE (in_rtx) == REG)
 226           {
 227             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 228               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 229             break;
 230           }
 231         if (i == 3 && GET_CODE (in_rtx) == NOTE)
 232           {
 233             switch (NOTE_LINE_NUMBER (in_rtx))
 234               {
 235               case NOTE_INSN_EH_REGION_BEG:
 236               case NOTE_INSN_EH_REGION_END:
 237                 if (flag_dump_unnumbered)
 238                   fprintf (outfile, " #");
 239                 else
 240                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 241                 sawclose = 1;
 242                 break;
 243
 244               case NOTE_INSN_BLOCK_BEG:
 245               case NOTE_INSN_BLOCK_END:
 246                 fprintf (outfile, " ");
 247                 if (flag_dump_unnumbered)
 248                   fprintf (outfile, "#");
 249                 else
 250                   fprintf (outfile, HOST_PTR_PRINTF,
 251                            (char *) NOTE_BLOCK (in_rtx));
 252                 sawclose = 1;
 253                 break;
 254
 255               case NOTE_INSN_BASIC_BLOCK:
 256                 {
 257                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 258                   if (bb != 0)
 259                     fprintf (outfile, " [bb %d]", bb->index);
 260                   break;
 261                 }
 262
 263               case NOTE_INSN_EXPECTED_VALUE:
 264                 indent += 2;
 265                 if (!sawclose)
 266                   fprintf (outfile, " ");
 267                 print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
 268                 indent -= 2;
 269                 break;
 270
 271               case NOTE_INSN_DELETED_LABEL:
 272                 if (NOTE_SOURCE_FILE (in_rtx))
 273                   fprintf (outfile, " (\"%s\")", NOTE_SOURCE_FILE (in_rtx));
 274                 else
 275                   fprintf (outfile, " \"\"");
 276                 break;
 277
 278               case NOTE_INSN_PREDICTION:
 279                 if (NOTE_PREDICTION (in_rtx))
 280                   fprintf (outfile, " [ %d %d ] ",
 281                            (int)NOTE_PREDICTION_ALG (in_rtx),
 282                            (int) NOTE_PREDICTION_FLAGS (in_rtx));
 283                 else
 284                   fprintf (outfile, " [ ERROR ]");
 285                 break;
 286
 287               default:
 288                 {
 289                   const char * const str = X0STR (in_rtx, i);
 290
 291                   if (NOTE_LINE_NUMBER (in_rtx) < 0)
 292                     ;
 293                   else if (str == 0)
 294                     fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 295                   else
 296                     {
 297                       if (dump_for_graph)
 298                         fprintf (outfile, " (\\\"%s\\\")", str);
 299                       else
 300                         fprintf (outfile, " (\"%s\")", str);
 301                     }
 302                   break;
 303                 }
 304               }
 305           }
 306         break;
 307
 308       case 'e':
 309       do_e:
 310         indent += 2;
 311         if (!sawclose)
 312           fprintf (outfile, " ");
 313         print_rtx (XEXP (in_rtx, i));
 314         indent -= 2;
 315         break;
 316
 317       case 'E':
 318       case 'V':
 319         indent += 2;
 320         if (sawclose)
 321           {
 322             fprintf (outfile, "\n%s%*s",
 323                      print_rtx_head, indent * 2, "");
 324             sawclose = 0;
 325           }
 326         fputs (" [", outfile);
 327         if (NULL != XVEC (in_rtx, i))
 328           {
 329             indent += 2;
 330             if (XVECLEN (in_rtx, i))
 331               sawclose = 1;
 332
 333             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 334               print_rtx (XVECEXP (in_rtx, i, j));
 335
 336             indent -= 2;
 337           }
 338         if (sawclose)
 339           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 340
 341         fputs ("]", outfile);
 342         sawclose = 1;
 343         indent -= 2;
 344         break;
 345
 346       case 'w':
 347         if (! flag_simple)
 348           fprintf (outfile, " ");
 349         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 350         if (! flag_simple)
 351           {
 352             fprintf (outfile, " [");
 353             fprintf (outfile, HOST_WIDE_INT_PRINT_HEX, XWINT (in_rtx, i));
 354             fprintf (outfile, "]");
 355           }
 356         break;
 357
 358       case 'i':
 359         if (i == 5 && GET_CODE (in_rtx) == NOTE)
 360           {
 361             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 362                other times often contains garbage from INSN->NOTE death.  */
 363             if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
 364               fprintf (outfile, " %d",  XINT (in_rtx, i));
 365           }
 366         else
 367           {
 368             int value = XINT (in_rtx, i);
 369             const char *name;
 370
 371             if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
 372               {
 373                 fputc (' ', outfile);
 374                 DEBUG_PRINT_REG (in_rtx, 0, outfile);
 375               }
 376             else if (GET_CODE (in_rtx) == REG
 377                      && value <= LAST_VIRTUAL_REGISTER)
 378               {
 379                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 380                   fprintf (outfile, " %d virtual-incoming-args", value);
 381                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 382                   fprintf (outfile, " %d virtual-stack-vars", value);
 383                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 384                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 385                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 386                   fprintf (outfile, " %d virtual-outgoing-args", value);
 387                 else if (value == VIRTUAL_CFA_REGNUM)
 388                   fprintf (outfile, " %d virtual-cfa", value);
 389                 else
 390                   fprintf (outfile, " %d virtual-reg-%d", value,
 391                            value-FIRST_VIRTUAL_REGISTER);
 392               }
 393             else if (flag_dump_unnumbered
 394                      && (is_insn || GET_CODE (in_rtx) == NOTE))
 395               fputc ('#', outfile);
 396             else
 397               fprintf (outfile, " %d", value);
 398
 399             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 400                 && XINT (in_rtx, i) >= 0
 401                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 402               fprintf (outfile, " {%s}", name);
 403             sawclose = 0;
 404           }
 405         break;
 406
 407       /* Print NOTE_INSN names rather than integer codes.  */
 408
 409       case 'n':
 410         if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
 411             && XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
 412           fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 413         else
 414           fprintf (outfile, " %d", XINT (in_rtx, i));
 415         sawclose = 0;
 416         break;
 417
 418       case 'u':
 419         if (XEXP (in_rtx, i) != NULL)
 420           {
 421             rtx sub = XEXP (in_rtx, i);
 422             enum rtx_code subc = GET_CODE (sub);
 423
 424             if (GET_CODE (in_rtx) == LABEL_REF)
 425               {
 426                 if (subc == NOTE
 427                     && NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
 428                   {
 429                     if (flag_dump_unnumbered)
 430                       fprintf (outfile, " [# deleted]");
 431                     else
 432                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 433                     sawclose = 0;
 434                     break;
 435                   }
 436
 437                 if (subc != CODE_LABEL)
 438                   goto do_e;
 439               }
 440
 441             if (flag_dump_unnumbered)
 442               fputs (" #", outfile);
 443             else
 444               fprintf (outfile, " %d", INSN_UID (sub));
 445           }
 446         else
 447           fputs (" 0", outfile);
 448         sawclose = 0;
 449         break;
 450
 451       case 'b':
 452         if (XBITMAP (in_rtx, i) == NULL)
 453           fputs (" {null}", outfile);
 454         else
 455           bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
 456         sawclose = 0;
 457         break;
 458
 459       case 't':
 460         putc (' ', outfile);
 461         fprintf (outfile, HOST_PTR_PRINTF, (char *) XTREE (in_rtx, i));
 462         break;
 463
 464       case '*':
 465         fputs (" Unknown", outfile);
 466         sawclose = 0;
 467         break;
 468
 469       case 'B':
 470         if (XBBDEF (in_rtx, i))
 471           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 472         break;
 473
 474       default:
 475         fprintf (stderr,
 476                  "switch format wrong in rtl.print_rtx(). format was: %c.\n",
 477                  format_ptr[-1]);
 478         abort ();
 479       }
 480
 481   switch (GET_CODE (in_rtx))
 482     {
 483     case MEM:
 484       fputs (" [", outfile);
 485       fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
 486
 487       if (MEM_EXPR (in_rtx))
 488         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 489
 490       if (MEM_OFFSET (in_rtx))
 491         {
 492           fputc ('+', outfile);
 493           fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 494                    INTVAL (MEM_OFFSET (in_rtx)));
 495         }
 496
 497       if (MEM_SIZE (in_rtx))
 498         {
 499           fputs (" S", outfile);
 500           fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 501                    INTVAL (MEM_SIZE (in_rtx)));
 502         }
 503
 504       if (MEM_ALIGN (in_rtx) != 1)
 505         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 506
 507       fputc (']', outfile);
 508       break;
 509
 510 #if 0
 511     /* It would be nice to do this, but it would require real.o to
 512        be linked into the MD-generator programs.  Maybe we should
 513        do that.  -zw 2002-03-03  */
 514     case CONST_DOUBLE:
 515       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 516         {
 517           REAL_VALUE_TYPE val;
 518           char s[30];
 519
 520           REAL_VALUE_FROM_CONST_DOUBLE (val, in_rtx);
 521           REAL_VALUE_TO_DECIMAL (val, "%.16g", s);
 522           fprintf (outfile, " [%s]", s);
 523         }
 524       break;
 525 #endif
 526
 527     case CODE_LABEL:
 528       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 529       if (LABEL_ALTERNATE_NAME (in_rtx))
 530         fprintf (outfile, " [alternate name: %s]",
 531                  LABEL_ALTERNATE_NAME (in_rtx));
 532       break;
 533
 534     case CALL_PLACEHOLDER:
 535       if (debug_call_placeholder_verbose)
 536         {
 537           fputs (" (cond [\n  (const_string \"normal\") (sequence [", outfile);
 538           for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 539             {
 540               fputs ("\n    ", outfile);
 541               print_inline_rtx (outfile, tem, 4);
 542             }
 543
 544           tem = XEXP (in_rtx, 1);
 545           if (tem)
 546             fputs ("\n    ])\n  (const_string \"tail_call\") (sequence [",
 547                    outfile);
 548           for (; tem != 0; tem = NEXT_INSN (tem))
 549             {
 550               fputs ("\n    ", outfile);
 551               print_inline_rtx (outfile, tem, 4);
 552             }
 553
 554           tem = XEXP (in_rtx, 2);
 555           if (tem)
 556             fputs ("\n    ])\n  (const_string \"tail_recursion\") (sequence [",
 557                    outfile);
 558           for (; tem != 0; tem = NEXT_INSN (tem))
 559             {
 560               fputs ("\n    ", outfile);
 561               print_inline_rtx (outfile, tem, 4);
 562             }
 563
 564           fputs ("\n    ])\n  ])", outfile);
 565           break;
 566         }
 567
 568       for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 569         if (GET_CODE (tem) == CALL_INSN)
 570           {
 571             fprintf (outfile, " ");
 572             print_rtx (tem);
 573             break;
 574           }
 575       break;
 576
 577     default:
 578       break;
 579     }
 580
 581   if (dump_for_graph
 582       && (is_insn || GET_CODE (in_rtx) == NOTE
 583           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 584     sawclose = 0;
 585   else
 586     {
 587       fputc (')', outfile);
 588       sawclose = 1;
 589     }
 590 }
 591
 592 /* Print an rtx on the current line of FILE.  Initially indent IND
 593    characters.  */
 594
 595 void
 596 print_inline_rtx (outf, x, ind)
 597      FILE *outf;
 598      rtx x;
 599      int ind;
 600 {
 601   int oldsaw = sawclose;
 602   int oldindent = indent;
 603
 604   sawclose = 0;
 605   indent = ind;
 606   outfile = outf;
 607   print_rtx (x);
 608   sawclose = oldsaw;
 609   indent = oldindent;
 610 }
 611
 612 /* Call this function from the debugger to see what X looks like.  */
 613
 614 void
 615 debug_rtx (x)
 616      rtx x;
 617 {
 618   outfile = stderr;
 619   sawclose = 0;
 620   print_rtx (x);
 621   fprintf (stderr, "\n");
 622 }
 623
 624 /* Count of rtx's to print with debug_rtx_list.
 625    This global exists because gdb user defined commands have no arguments.  */
 626
 627 int debug_rtx_count = 0;        /* 0 is treated as equivalent to 1 */
 628
 629 /* Call this function to print list from X on.
 630
 631    N is a count of the rtx's to print. Positive values print from the specified
 632    rtx on.  Negative values print a window around the rtx.
 633    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 634
 635 void
 636 debug_rtx_list (x, n)
 637      rtx x;
 638      int n;
 639 {
 640   int i,count;
 641   rtx insn;
 642
 643   count = n == 0 ? 1 : n < 0 ? -n : n;
 644
 645   /* If we are printing a window, back up to the start.  */
 646
 647   if (n < 0)
 648     for (i = count / 2; i > 0; i--)
 649       {
 650         if (PREV_INSN (x) == 0)
 651           break;
 652         x = PREV_INSN (x);
 653       }
 654
 655   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 656     {
 657       debug_rtx (insn);
 658       fprintf (stderr, "\n");
 659     }
 660 }
 661
 662 /* Call this function to print an rtx list from START to END inclusive.  */
 663
 664 void
 665 debug_rtx_range (start, end)
 666      rtx start, end;
 667 {
 668   while (1)
 669     {
 670       debug_rtx (start);
 671       fprintf (stderr, "\n");
 672       if (!start || start == end)
 673         break;
 674       start = NEXT_INSN (start);
 675     }
 676 }
 677
 678 /* Call this function to search an rtx list to find one with insn uid UID,
 679    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 680    The found insn is returned to enable further debugging analysis.  */
 681
 682 rtx
 683 debug_rtx_find (x, uid)
 684      rtx x;
 685      int uid;
 686 {
 687   while (x != 0 && INSN_UID (x) != uid)
 688     x = NEXT_INSN (x);
 689   if (x != 0)
 690     {
 691       debug_rtx_list (x, debug_rtx_count);
 692       return x;
 693     }
 694   else
 695     {
 696       fprintf (stderr, "insn uid %d not found\n", uid);
 697       return 0;
 698     }
 699 }
 700
 701 /* External entry point for printing a chain of insns
 702    starting with RTX_FIRST onto file OUTF.
 703    A blank line separates insns.
 704
 705    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 706
 707 void
 708 print_rtl (outf, rtx_first)
 709      FILE *outf;
 710      rtx rtx_first;
 711 {
 712   rtx tmp_rtx;
 713
 714   outfile = outf;
 715   sawclose = 0;
 716
 717   if (rtx_first == 0)
 718     {
 719       fputs (print_rtx_head, outf);
 720       fputs ("(nil)\n", outf);
 721     }
 722   else
 723     switch (GET_CODE (rtx_first))
 724       {
 725       case INSN:
 726       case JUMP_INSN:
 727       case CALL_INSN:
 728       case NOTE:
 729       case CODE_LABEL:
 730       case BARRIER:
 731         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 732           if (! flag_dump_unnumbered
 733               || GET_CODE (tmp_rtx) != NOTE || NOTE_LINE_NUMBER (tmp_rtx) < 0)
 734             {
 735               fputs (print_rtx_head, outfile);
 736               print_rtx (tmp_rtx);
 737               fprintf (outfile, "\n");
 738             }
 739         break;
 740
 741       default:
 742         fputs (print_rtx_head, outfile);
 743         print_rtx (rtx_first);
 744       }
 745 }
 746
 747 /* Like print_rtx, except specify a file.  */
 748 /* Return nonzero if we actually printed anything.  */
 749
 750 int
 751 print_rtl_single (outf, x)
 752      FILE *outf;
 753      rtx x;
 754 {
 755   outfile = outf;
 756   sawclose = 0;
 757   if (! flag_dump_unnumbered
 758       || GET_CODE (x) != NOTE || NOTE_LINE_NUMBER (x) < 0)
 759     {
 760       fputs (print_rtx_head, outfile);
 761       print_rtx (x);
 762       putc ('\n', outf);
 763       return 1;
 764     }
 765   return 0;
 766 }
 767
 768
 769 /* Like print_rtl except without all the detail; for example,
 770    if RTX is a CONST_INT then print in decimal format.  */
 771
 772 void
 773 print_simple_rtl (outf, x)
 774      FILE *outf;
 775      rtx x;
 776 {
 777   flag_simple = 1;
 778   print_rtl (outf, x);
 779   flag_simple = 0;
 780 }