gcc/print-rtl.c

   1 /* Print RTL for GCC.
   2    Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000, 2002, 2003, 2004
   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 "coretypes.h"
  26 #include "tm.h"
  27 #include "rtl.h"
  28
  29 /* We don't want the tree code checking code for the access to the
  30    DECL_NAME to be included in the gen* programs.  */
  31 #undef ENABLE_TREE_CHECKING
  32 #include "tree.h"
  33 #include "real.h"
  34 #include "flags.h"
  35 #include "hard-reg-set.h"
  36 #include "basic-block.h"
  37 #include "tm_p.h"
  38
  39 static FILE *outfile;
  40
  41 static int sawclose = 0;
  42
  43 static int indent;
  44
  45 static void print_rtx (rtx);
  46
  47 /* String printed at beginning of each RTL when it is dumped.
  48    This string is set to ASM_COMMENT_START when the RTL is dumped in
  49    the assembly output file.  */
  50 const char *print_rtx_head = "";
  51
  52 /* Nonzero means suppress output of instruction numbers and line number
  53    notes in debugging dumps.
  54    This must be defined here so that programs like gencodes can be linked.  */
  55 int flag_dump_unnumbered = 0;
  56
  57 /* Nonzero means use simplified format without flags, modes, etc.  */
  58 int flag_simple = 0;
  59
  60 /* Nonzero if we are dumping graphical description.  */
  61 int dump_for_graph;
  62
  63 void
  64 print_mem_expr (FILE *outfile, tree expr)
  65 {
  66   if (TREE_CODE (expr) == COMPONENT_REF)
  67     {
  68       if (TREE_OPERAND (expr, 0))
  69         print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  70       else
  71         fputs (" <variable>", outfile);
  72       if (DECL_NAME (TREE_OPERAND (expr, 1)))
  73         fprintf (outfile, ".%s",
  74                  IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
  75     }
  76   else if (TREE_CODE (expr) == INDIRECT_REF)
  77     {
  78       fputs (" (*", outfile);
  79       print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  80       fputs (")", outfile);
  81     }
  82   else if (DECL_NAME (expr))
  83     fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
  84   else if (TREE_CODE (expr) == RESULT_DECL)
  85     fputs (" <result>", outfile);
  86   else
  87     fputs (" <anonymous>", outfile);
  88 }
  89
  90 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  91
  92 static void
  93 print_rtx (rtx in_rtx)
  94 {
  95   int i = 0;
  96   int j;
  97   const char *format_ptr;
  98   int is_insn;
  99
 100   if (sawclose)
 101     {
 102       if (flag_simple)
 103         fputc (' ', outfile);
 104       else
 105         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 106       sawclose = 0;
 107     }
 108
 109   if (in_rtx == 0)
 110     {
 111       fputs ("(nil)", outfile);
 112       sawclose = 1;
 113       return;
 114     }
 115   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 116     {
 117        fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
 118        sawclose = 1;
 119        return;
 120     }
 121
 122   is_insn = INSN_P (in_rtx);
 123
 124   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 125      in separate nodes and therefore have to handle them special here.  */
 126   if (dump_for_graph
 127       && (is_insn || NOTE_P (in_rtx)
 128           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 129     {
 130       i = 3;
 131       indent = 0;
 132     }
 133   else
 134     {
 135       /* Print name of expression code.  */
 136       if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
 137         fputc ('(', outfile);
 138       else
 139         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 140
 141       if (! flag_simple)
 142         {
 143           if (RTX_FLAG (in_rtx, in_struct))
 144             fputs ("/s", outfile);
 145
 146           if (RTX_FLAG (in_rtx, volatil))
 147             fputs ("/v", outfile);
 148
 149           if (RTX_FLAG (in_rtx, unchanging))
 150             fputs ("/u", outfile);
 151
 152           if (RTX_FLAG (in_rtx, frame_related))
 153             fputs ("/f", outfile);
 154
 155           if (RTX_FLAG (in_rtx, jump))
 156             fputs ("/j", outfile);
 157
 158           if (RTX_FLAG (in_rtx, call))
 159             fputs ("/c", outfile);
 160
 161           if (RTX_FLAG (in_rtx, return_val))
 162             fputs ("/i", outfile);
 163
 164           if (GET_MODE (in_rtx) != VOIDmode)
 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                 fprintf (outfile, ":%s",
 170                          GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 171               else
 172                 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 173             }
 174         }
 175     }
 176
 177 #ifndef GENERATOR_FILE
 178   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 179     i = 5;
 180 #endif
 181
 182   /* Get the format string and skip the first elements if we have handled
 183      them already.  */
 184   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 185   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 186     switch (*format_ptr++)
 187       {
 188         const char *str;
 189
 190       case 'T':
 191         str = XTMPL (in_rtx, i);
 192         goto string;
 193
 194       case 'S':
 195       case 's':
 196         str = XSTR (in_rtx, i);
 197       string:
 198
 199         if (str == 0)
 200           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 201         else
 202           {
 203             if (dump_for_graph)
 204               fprintf (outfile, " (\\\"%s\\\")", str);
 205             else
 206               fprintf (outfile, " (\"%s\")", str);
 207           }
 208         sawclose = 1;
 209         break;
 210
 211         /* 0 indicates a field for internal use that should not be printed.
 212            An exception is the third field of a NOTE, where it indicates
 213            that the field has several different valid contents.  */
 214       case '0':
 215         if (i == 1 && REG_P (in_rtx))
 216           {
 217             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 218               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 219           }
 220 #ifndef GENERATOR_FILE
 221         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 222           {
 223             int flags = SYMBOL_REF_FLAGS (in_rtx);
 224             if (flags)
 225               fprintf (outfile, " [flags 0x%x]", flags);
 226           }
 227         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 228           {
 229             tree decl = SYMBOL_REF_DECL (in_rtx);
 230             if (decl)
 231               print_node_brief (outfile, "", decl, 0);
 232           }
 233 #endif
 234         else if (i == 4 && NOTE_P (in_rtx))
 235           {
 236             switch (NOTE_LINE_NUMBER (in_rtx))
 237               {
 238               case NOTE_INSN_EH_REGION_BEG:
 239               case NOTE_INSN_EH_REGION_END:
 240                 if (flag_dump_unnumbered)
 241                   fprintf (outfile, " #");
 242                 else
 243                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 244                 sawclose = 1;
 245                 break;
 246
 247               case NOTE_INSN_BLOCK_BEG:
 248               case NOTE_INSN_BLOCK_END:
 249                 fprintf (outfile, " ");
 250                 if (flag_dump_unnumbered)
 251                   fprintf (outfile, "#");
 252                 else
 253                   fprintf (outfile, HOST_PTR_PRINTF,
 254                            (char *) NOTE_BLOCK (in_rtx));
 255                 sawclose = 1;
 256                 break;
 257
 258               case NOTE_INSN_BASIC_BLOCK:
 259                 {
 260                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 261                   if (bb != 0)
 262                     fprintf (outfile, " [bb %d]", bb->index);
 263                   break;
 264                 }
 265
 266               case NOTE_INSN_EXPECTED_VALUE:
 267                 indent += 2;
 268                 if (!sawclose)
 269                   fprintf (outfile, " ");
 270                 print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
 271                 indent -= 2;
 272                 break;
 273
 274               case NOTE_INSN_DELETED_LABEL:
 275                 {
 276                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 277                   if (label)
 278                     fprintf (outfile, " (\"%s\")", label);
 279                   else
 280                     fprintf (outfile, " \"\"");
 281                 }
 282                 break;
 283
 284               case NOTE_INSN_UNLIKELY_EXECUTED_CODE:
 285                 {
 286                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 287                   if (bb != 0)
 288                     fprintf (outfile, " [bb %d]", bb->index);
 289                   break;
 290                 }
 291
 292               case NOTE_INSN_VAR_LOCATION:
 293                 fprintf (outfile, " (");
 294                 print_mem_expr (outfile, NOTE_VAR_LOCATION_DECL (in_rtx));
 295                 fprintf (outfile, " ");
 296                 print_rtx (NOTE_VAR_LOCATION_LOC (in_rtx));
 297                 fprintf (outfile, ")");
 298                 break;
 299
 300               default:
 301                 {
 302                   const char * const str = X0STR (in_rtx, i);
 303
 304                   if (NOTE_LINE_NUMBER (in_rtx) < 0)
 305                     ;
 306                   else if (str == 0)
 307                     fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 308                   else
 309                     {
 310                       if (dump_for_graph)
 311                         fprintf (outfile, " (\\\"%s\\\")", str);
 312                       else
 313                         fprintf (outfile, " (\"%s\")", str);
 314                     }
 315                   break;
 316                 }
 317               }
 318           }
 319         break;
 320
 321       case 'e':
 322       do_e:
 323         indent += 2;
 324         if (!sawclose)
 325           fprintf (outfile, " ");
 326         print_rtx (XEXP (in_rtx, i));
 327         indent -= 2;
 328         break;
 329
 330       case 'E':
 331       case 'V':
 332         indent += 2;
 333         if (sawclose)
 334           {
 335             fprintf (outfile, "\n%s%*s",
 336                      print_rtx_head, indent * 2, "");
 337             sawclose = 0;
 338           }
 339         fputs (" [", outfile);
 340         if (NULL != XVEC (in_rtx, i))
 341           {
 342             indent += 2;
 343             if (XVECLEN (in_rtx, i))
 344               sawclose = 1;
 345
 346             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 347               print_rtx (XVECEXP (in_rtx, i, j));
 348
 349             indent -= 2;
 350           }
 351         if (sawclose)
 352           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 353
 354         fputs ("]", outfile);
 355         sawclose = 1;
 356         indent -= 2;
 357         break;
 358
 359       case 'w':
 360         if (! flag_simple)
 361           fprintf (outfile, " ");
 362         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 363         if (! flag_simple)
 364           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 365                    XWINT (in_rtx, i));
 366         break;
 367
 368       case 'i':
 369         if (i == 4 && INSN_P (in_rtx))
 370           {
 371 #ifndef GENERATOR_FILE
 372             /*  Pretty-print insn locators.  Ignore scoping as it is mostly
 373                 redundant with line number information and do not print anything
 374                 when there is no location information available.  */
 375             if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
 376               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 377 #endif
 378           }
 379         else if (i == 6 && NOTE_P (in_rtx))
 380           {
 381             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 382                other times often contains garbage from INSN->NOTE death.  */
 383             if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
 384               fprintf (outfile, " %d",  XINT (in_rtx, i));
 385           }
 386         else
 387           {
 388             int value = XINT (in_rtx, i);
 389             const char *name;
 390
 391 #ifndef GENERATOR_FILE
 392             if (REG_P (in_rtx) && value < FIRST_PSEUDO_REGISTER)
 393               fprintf (outfile, " %d %s", REGNO (in_rtx),
 394                        reg_names[REGNO (in_rtx)]);
 395             else if (REG_P (in_rtx)
 396                      && value <= LAST_VIRTUAL_REGISTER)
 397               {
 398                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 399                   fprintf (outfile, " %d virtual-incoming-args", value);
 400                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 401                   fprintf (outfile, " %d virtual-stack-vars", value);
 402                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 403                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 404                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 405                   fprintf (outfile, " %d virtual-outgoing-args", value);
 406                 else if (value == VIRTUAL_CFA_REGNUM)
 407                   fprintf (outfile, " %d virtual-cfa", value);
 408                 else
 409                   fprintf (outfile, " %d virtual-reg-%d", value,
 410                            value-FIRST_VIRTUAL_REGISTER);
 411               }
 412             else
 413 #endif
 414               if (flag_dump_unnumbered
 415                      && (is_insn || NOTE_P (in_rtx)))
 416               fputc ('#', outfile);
 417             else
 418               fprintf (outfile, " %d", value);
 419
 420             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 421               {
 422                 fputs (" [", outfile);
 423                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 424                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 425                 if (REG_EXPR (in_rtx))
 426                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 427
 428                 if (REG_OFFSET (in_rtx))
 429                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 430                            REG_OFFSET (in_rtx));
 431                 fputs (" ]", outfile);
 432               }
 433
 434             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 435                 && XINT (in_rtx, i) >= 0
 436                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 437               fprintf (outfile, " {%s}", name);
 438             sawclose = 0;
 439           }
 440         break;
 441
 442       /* Print NOTE_INSN names rather than integer codes.  */
 443
 444       case 'n':
 445         if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
 446             && XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
 447           fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 448         else
 449           fprintf (outfile, " %d", XINT (in_rtx, i));
 450         sawclose = 0;
 451         break;
 452
 453       case 'u':
 454         if (XEXP (in_rtx, i) != NULL)
 455           {
 456             rtx sub = XEXP (in_rtx, i);
 457             enum rtx_code subc = GET_CODE (sub);
 458
 459             if (GET_CODE (in_rtx) == LABEL_REF)
 460               {
 461                 if (subc == NOTE
 462                     && NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
 463                   {
 464                     if (flag_dump_unnumbered)
 465                       fprintf (outfile, " [# deleted]");
 466                     else
 467                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 468                     sawclose = 0;
 469                     break;
 470                   }
 471
 472                 if (subc != CODE_LABEL)
 473                   goto do_e;
 474               }
 475
 476             if (flag_dump_unnumbered)
 477               fputs (" #", outfile);
 478             else
 479               fprintf (outfile, " %d", INSN_UID (sub));
 480           }
 481         else
 482           fputs (" 0", outfile);
 483         sawclose = 0;
 484         break;
 485
 486       case 'b':
 487 #ifdef GENERATOR_FILE
 488         fputs (" {bitmap}", outfile);
 489 #else
 490         if (XBITMAP (in_rtx, i) == NULL)
 491           fputs (" {null}", outfile);
 492         else
 493           bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
 494 #endif
 495         sawclose = 0;
 496         break;
 497
 498       case 't':
 499         fprintf (outfile, " " HOST_PTR_PRINTF, (void *) XTREE (in_rtx, i));
 500         break;
 501
 502       case '*':
 503         fputs (" Unknown", outfile);
 504         sawclose = 0;
 505         break;
 506
 507       case 'B':
 508         if (XBBDEF (in_rtx, i))
 509           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 510         break;
 511
 512       default:
 513         fprintf (stderr,
 514                  "switch format wrong in rtl.print_rtx(). format was: %c.\n",
 515                  format_ptr[-1]);
 516         abort ();
 517       }
 518
 519   switch (GET_CODE (in_rtx))
 520     {
 521 #ifndef GENERATOR_FILE
 522     case MEM:
 523       fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
 524
 525       if (MEM_EXPR (in_rtx))
 526         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 527
 528       if (MEM_OFFSET (in_rtx))
 529         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 530                  INTVAL (MEM_OFFSET (in_rtx)));
 531
 532       if (MEM_SIZE (in_rtx))
 533         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 534                  INTVAL (MEM_SIZE (in_rtx)));
 535
 536       if (MEM_ALIGN (in_rtx) != 1)
 537         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 538
 539       fputc (']', outfile);
 540       break;
 541
 542     case CONST_DOUBLE:
 543       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 544         {
 545           char s[60];
 546
 547           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 548                            sizeof (s), 0, 1);
 549           fprintf (outfile, " %s", s);
 550
 551           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 552                                sizeof (s), 0, 1);
 553           fprintf (outfile, " [%s]", s);
 554         }
 555       break;
 556 #endif
 557
 558     case CODE_LABEL:
 559       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 560       switch (LABEL_KIND (in_rtx))
 561         {
 562           case LABEL_NORMAL: break;
 563           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 564           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 565           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 566           default: abort();
 567         }
 568       break;
 569
 570     default:
 571       break;
 572     }
 573
 574   if (dump_for_graph
 575       && (is_insn || NOTE_P (in_rtx)
 576           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 577     sawclose = 0;
 578   else
 579     {
 580       fputc (')', outfile);
 581       sawclose = 1;
 582     }
 583 }
 584
 585 /* Print an rtx on the current line of FILE.  Initially indent IND
 586    characters.  */
 587
 588 void
 589 print_inline_rtx (FILE *outf, rtx x, int ind)
 590 {
 591   int oldsaw = sawclose;
 592   int oldindent = indent;
 593
 594   sawclose = 0;
 595   indent = ind;
 596   outfile = outf;
 597   print_rtx (x);
 598   sawclose = oldsaw;
 599   indent = oldindent;
 600 }
 601
 602 /* Call this function from the debugger to see what X looks like.  */
 603
 604 void
 605 debug_rtx (rtx x)
 606 {
 607   outfile = stderr;
 608   sawclose = 0;
 609   print_rtx (x);
 610   fprintf (stderr, "\n");
 611 }
 612
 613 /* Count of rtx's to print with debug_rtx_list.
 614    This global exists because gdb user defined commands have no arguments.  */
 615
 616 int debug_rtx_count = 0;        /* 0 is treated as equivalent to 1 */
 617
 618 /* Call this function to print list from X on.
 619
 620    N is a count of the rtx's to print. Positive values print from the specified
 621    rtx on.  Negative values print a window around the rtx.
 622    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 623
 624 void
 625 debug_rtx_list (rtx x, int n)
 626 {
 627   int i,count;
 628   rtx insn;
 629
 630   count = n == 0 ? 1 : n < 0 ? -n : n;
 631
 632   /* If we are printing a window, back up to the start.  */
 633
 634   if (n < 0)
 635     for (i = count / 2; i > 0; i--)
 636       {
 637         if (PREV_INSN (x) == 0)
 638           break;
 639         x = PREV_INSN (x);
 640       }
 641
 642   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 643     {
 644       debug_rtx (insn);
 645       fprintf (stderr, "\n");
 646     }
 647 }
 648
 649 /* Call this function to print an rtx list from START to END inclusive.  */
 650
 651 void
 652 debug_rtx_range (rtx start, rtx end)
 653 {
 654   while (1)
 655     {
 656       debug_rtx (start);
 657       fprintf (stderr, "\n");
 658       if (!start || start == end)
 659         break;
 660       start = NEXT_INSN (start);
 661     }
 662 }
 663
 664 /* Call this function to search an rtx list to find one with insn uid UID,
 665    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 666    The found insn is returned to enable further debugging analysis.  */
 667
 668 rtx
 669 debug_rtx_find (rtx x, int uid)
 670 {
 671   while (x != 0 && INSN_UID (x) != uid)
 672     x = NEXT_INSN (x);
 673   if (x != 0)
 674     {
 675       debug_rtx_list (x, debug_rtx_count);
 676       return x;
 677     }
 678   else
 679     {
 680       fprintf (stderr, "insn uid %d not found\n", uid);
 681       return 0;
 682     }
 683 }
 684
 685 /* External entry point for printing a chain of insns
 686    starting with RTX_FIRST onto file OUTF.
 687    A blank line separates insns.
 688
 689    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 690
 691 void
 692 print_rtl (FILE *outf, rtx rtx_first)
 693 {
 694   rtx tmp_rtx;
 695
 696   outfile = outf;
 697   sawclose = 0;
 698
 699   if (rtx_first == 0)
 700     {
 701       fputs (print_rtx_head, outf);
 702       fputs ("(nil)\n", outf);
 703     }
 704   else
 705     switch (GET_CODE (rtx_first))
 706       {
 707       case INSN:
 708       case JUMP_INSN:
 709       case CALL_INSN:
 710       case NOTE:
 711       case CODE_LABEL:
 712       case BARRIER:
 713         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 714           if (! flag_dump_unnumbered
 715               || !NOTE_P (tmp_rtx) || NOTE_LINE_NUMBER (tmp_rtx) < 0)
 716             {
 717               fputs (print_rtx_head, outfile);
 718               print_rtx (tmp_rtx);
 719               fprintf (outfile, "\n");
 720             }
 721         break;
 722
 723       default:
 724         fputs (print_rtx_head, outfile);
 725         print_rtx (rtx_first);
 726       }
 727 }
 728
 729 /* Like print_rtx, except specify a file.  */
 730 /* Return nonzero if we actually printed anything.  */
 731
 732 int
 733 print_rtl_single (FILE *outf, rtx x)
 734 {
 735   outfile = outf;
 736   sawclose = 0;
 737   if (! flag_dump_unnumbered
 738       || !NOTE_P (x) || NOTE_LINE_NUMBER (x) < 0)
 739     {
 740       fputs (print_rtx_head, outfile);
 741       print_rtx (x);
 742       putc ('\n', outf);
 743       return 1;
 744     }
 745   return 0;
 746 }
 747
 748
 749 /* Like print_rtl except without all the detail; for example,
 750    if RTX is a CONST_INT then print in decimal format.  */
 751
 752 void
 753 print_simple_rtl (FILE *outf, rtx x)
 754 {
 755   flag_simple = 1;
 756   print_rtl (outf, x);
 757   flag_simple = 0;
 758 }