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 /* 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 "real.h"
  40 #include "flags.h"
  41 #include "hard-reg-set.h"
  42 #include "basic-block.h"
  43 #endif
  44
  45 static FILE *outfile;
  46
  47 static int sawclose = 0;
  48
  49 static int indent;
  50
  51 static void print_rtx (rtx);
  52
  53 /* String printed at beginning of each RTL when it is dumped.
  54    This string is set to ASM_COMMENT_START when the RTL is dumped in
  55    the assembly output file.  */
  56 const char *print_rtx_head = "";
  57
  58 /* Nonzero means suppress output of instruction numbers and line number
  59    notes in debugging dumps.
  60    This must be defined here so that programs like gencodes can be linked.  */
  61 int flag_dump_unnumbered = 0;
  62
  63 /* Nonzero means use simplified format without flags, modes, etc.  */
  64 int flag_simple = 0;
  65
  66 /* Nonzero if we are dumping graphical description.  */
  67 int dump_for_graph;
  68
  69 #ifndef GENERATOR_FILE
  70 void
  71 print_mem_expr (FILE *outfile, tree expr)
  72 {
  73   if (TREE_CODE (expr) == COMPONENT_REF)
  74     {
  75       if (TREE_OPERAND (expr, 0))
  76         print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  77       else
  78         fputs (" <variable>", outfile);
  79       if (DECL_NAME (TREE_OPERAND (expr, 1)))
  80         fprintf (outfile, ".%s",
  81                  IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
  82     }
  83   else if (TREE_CODE (expr) == INDIRECT_REF)
  84     {
  85       fputs (" (*", outfile);
  86       print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  87       fputs (")", outfile);
  88     }
  89   else if (DECL_NAME (expr))
  90     fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
  91   else if (TREE_CODE (expr) == RESULT_DECL)
  92     fputs (" <result>", outfile);
  93   else
  94     fputs (" <anonymous>", outfile);
  95 }
  96 #endif
  97
  98 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  99
 100 static void
 101 print_rtx (rtx in_rtx)
 102 {
 103   int i = 0;
 104   int j;
 105   const char *format_ptr;
 106   int is_insn;
 107
 108   if (sawclose)
 109     {
 110       if (flag_simple)
 111         fputc (' ', outfile);
 112       else
 113         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 114       sawclose = 0;
 115     }
 116
 117   if (in_rtx == 0)
 118     {
 119       fputs ("(nil)", outfile);
 120       sawclose = 1;
 121       return;
 122     }
 123   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 124     {
 125        fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
 126        sawclose = 1;
 127        return;
 128     }
 129
 130   is_insn = INSN_P (in_rtx);
 131
 132   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 133      in separate nodes and therefore have to handle them special here.  */
 134   if (dump_for_graph
 135       && (is_insn || NOTE_P (in_rtx)
 136           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 137     {
 138       i = 3;
 139       indent = 0;
 140     }
 141   else
 142     {
 143       /* Print name of expression code.  */
 144       if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
 145         fputc ('(', outfile);
 146       else
 147         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 148
 149       if (! flag_simple)
 150         {
 151           if (RTX_FLAG (in_rtx, in_struct))
 152             fputs ("/s", outfile);
 153
 154           if (RTX_FLAG (in_rtx, volatil))
 155             fputs ("/v", outfile);
 156
 157           if (RTX_FLAG (in_rtx, unchanging))
 158             fputs ("/u", outfile);
 159
 160           if (RTX_FLAG (in_rtx, frame_related))
 161             fputs ("/f", outfile);
 162
 163           if (RTX_FLAG (in_rtx, jump))
 164             fputs ("/j", outfile);
 165
 166           if (RTX_FLAG (in_rtx, call))
 167             fputs ("/c", outfile);
 168
 169           if (RTX_FLAG (in_rtx, return_val))
 170             fputs ("/i", outfile);
 171
 172           if (GET_MODE (in_rtx) != VOIDmode)
 173             {
 174               /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 175               if (GET_CODE (in_rtx) == EXPR_LIST
 176                   || GET_CODE (in_rtx) == INSN_LIST)
 177                 fprintf (outfile, ":%s",
 178                          GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 179               else
 180                 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 181             }
 182         }
 183     }
 184
 185 #ifndef GENERATOR_FILE
 186   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 187     i = 5;
 188 #endif
 189
 190   /* Get the format string and skip the first elements if we have handled
 191      them already.  */
 192   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 193   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 194     switch (*format_ptr++)
 195       {
 196         const char *str;
 197
 198       case 'T':
 199         str = XTMPL (in_rtx, i);
 200         goto string;
 201
 202       case 'S':
 203       case 's':
 204         str = XSTR (in_rtx, i);
 205       string:
 206
 207         if (str == 0)
 208           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 209         else
 210           {
 211             if (dump_for_graph)
 212               fprintf (outfile, " (\\\"%s\\\")", str);
 213             else
 214               fprintf (outfile, " (\"%s\")", str);
 215           }
 216         sawclose = 1;
 217         break;
 218
 219         /* 0 indicates a field for internal use that should not be printed.
 220            An exception is the third field of a NOTE, where it indicates
 221            that the field has several different valid contents.  */
 222       case '0':
 223         if (i == 1 && REG_P (in_rtx))
 224           {
 225             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 226               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 227           }
 228 #ifndef GENERATOR_FILE
 229         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 230           {
 231             int flags = SYMBOL_REF_FLAGS (in_rtx);
 232             if (flags)
 233               fprintf (outfile, " [flags 0x%x]", flags);
 234           }
 235         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 236           {
 237             tree decl = SYMBOL_REF_DECL (in_rtx);
 238             if (decl)
 239               print_node_brief (outfile, "", decl, 0);
 240           }
 241 #endif
 242         else if (i == 4 && NOTE_P (in_rtx))
 243           {
 244             switch (NOTE_LINE_NUMBER (in_rtx))
 245               {
 246               case NOTE_INSN_EH_REGION_BEG:
 247               case NOTE_INSN_EH_REGION_END:
 248                 if (flag_dump_unnumbered)
 249                   fprintf (outfile, " #");
 250                 else
 251                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 252                 sawclose = 1;
 253                 break;
 254
 255               case NOTE_INSN_BLOCK_BEG:
 256               case NOTE_INSN_BLOCK_END:
 257                 fprintf (outfile, " ");
 258                 if (flag_dump_unnumbered)
 259                   fprintf (outfile, "#");
 260                 else
 261                   fprintf (outfile, HOST_PTR_PRINTF,
 262                            (char *) NOTE_BLOCK (in_rtx));
 263                 sawclose = 1;
 264                 break;
 265
 266               case NOTE_INSN_BASIC_BLOCK:
 267                 {
 268 #ifndef GENERATOR_FILE
 269                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 270                   if (bb != 0)
 271                     fprintf (outfile, " [bb %d]", bb->index);
 272 #endif
 273                   break;
 274                 }
 275
 276               case NOTE_INSN_EXPECTED_VALUE:
 277                 indent += 2;
 278                 if (!sawclose)
 279                   fprintf (outfile, " ");
 280                 print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
 281                 indent -= 2;
 282                 break;
 283
 284               case NOTE_INSN_DELETED_LABEL:
 285                 {
 286                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 287                   if (label)
 288                     fprintf (outfile, " (\"%s\")", label);
 289                   else
 290                     fprintf (outfile, " \"\"");
 291                 }
 292                 break;
 293
 294               case NOTE_INSN_UNLIKELY_EXECUTED_CODE:
 295                 {
 296 #ifndef GENERATOR_FILE
 297                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 298                   if (bb != 0)
 299                     fprintf (outfile, " [bb %d]", bb->index);
 300 #endif
 301                   break;
 302                 }
 303
 304               case NOTE_INSN_VAR_LOCATION:
 305 #ifndef GENERATOR_FILE
 306                 fprintf (outfile, " (");
 307                 print_mem_expr (outfile, NOTE_VAR_LOCATION_DECL (in_rtx));
 308                 fprintf (outfile, " ");
 309                 print_rtx (NOTE_VAR_LOCATION_LOC (in_rtx));
 310                 fprintf (outfile, ")");
 311 #endif
 312                 break;
 313
 314               default:
 315                 {
 316                   const char * const str = X0STR (in_rtx, i);
 317
 318                   if (NOTE_LINE_NUMBER (in_rtx) < 0)
 319                     ;
 320                   else if (str == 0)
 321                     fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 322                   else
 323                     {
 324                       if (dump_for_graph)
 325                         fprintf (outfile, " (\\\"%s\\\")", str);
 326                       else
 327                         fprintf (outfile, " (\"%s\")", str);
 328                     }
 329                   break;
 330                 }
 331               }
 332           }
 333         break;
 334
 335       case 'e':
 336       do_e:
 337         indent += 2;
 338         if (!sawclose)
 339           fprintf (outfile, " ");
 340         print_rtx (XEXP (in_rtx, i));
 341         indent -= 2;
 342         break;
 343
 344       case 'E':
 345       case 'V':
 346         indent += 2;
 347         if (sawclose)
 348           {
 349             fprintf (outfile, "\n%s%*s",
 350                      print_rtx_head, indent * 2, "");
 351             sawclose = 0;
 352           }
 353         fputs (" [", outfile);
 354         if (NULL != XVEC (in_rtx, i))
 355           {
 356             indent += 2;
 357             if (XVECLEN (in_rtx, i))
 358               sawclose = 1;
 359
 360             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 361               print_rtx (XVECEXP (in_rtx, i, j));
 362
 363             indent -= 2;
 364           }
 365         if (sawclose)
 366           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 367
 368         fputs ("]", outfile);
 369         sawclose = 1;
 370         indent -= 2;
 371         break;
 372
 373       case 'w':
 374         if (! flag_simple)
 375           fprintf (outfile, " ");
 376         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 377         if (! flag_simple)
 378           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 379                    XWINT (in_rtx, i));
 380         break;
 381
 382       case 'i':
 383         if (i == 4 && INSN_P (in_rtx))
 384           {
 385 #ifndef GENERATOR_FILE
 386             /*  Pretty-print insn locators.  Ignore scoping as it is mostly
 387                 redundant with line number information and do not print anything
 388                 when there is no location information available.  */
 389             if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
 390               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 391 #endif
 392           }
 393         else if (i == 6 && NOTE_P (in_rtx))
 394           {
 395             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 396                other times often contains garbage from INSN->NOTE death.  */
 397             if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
 398               fprintf (outfile, " %d",  XINT (in_rtx, i));
 399           }
 400         else
 401           {
 402             int value = XINT (in_rtx, i);
 403             const char *name;
 404
 405 #ifndef GENERATOR_FILE
 406             if (REG_P (in_rtx) && value < FIRST_PSEUDO_REGISTER)
 407               fprintf (outfile, " %d %s", REGNO (in_rtx),
 408                        reg_names[REGNO (in_rtx)]);
 409             else if (REG_P (in_rtx)
 410                      && value <= LAST_VIRTUAL_REGISTER)
 411               {
 412                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 413                   fprintf (outfile, " %d virtual-incoming-args", value);
 414                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 415                   fprintf (outfile, " %d virtual-stack-vars", value);
 416                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 417                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 418                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 419                   fprintf (outfile, " %d virtual-outgoing-args", value);
 420                 else if (value == VIRTUAL_CFA_REGNUM)
 421                   fprintf (outfile, " %d virtual-cfa", value);
 422                 else
 423                   fprintf (outfile, " %d virtual-reg-%d", value,
 424                            value-FIRST_VIRTUAL_REGISTER);
 425               }
 426             else
 427 #endif
 428               if (flag_dump_unnumbered
 429                      && (is_insn || NOTE_P (in_rtx)))
 430               fputc ('#', outfile);
 431             else
 432               fprintf (outfile, " %d", value);
 433
 434 #ifndef GENERATOR_FILE
 435             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 436               {
 437                 fputs (" [", outfile);
 438                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 439                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 440                 if (REG_EXPR (in_rtx))
 441                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 442
 443                 if (REG_OFFSET (in_rtx))
 444                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 445                            REG_OFFSET (in_rtx));
 446                 fputs (" ]", outfile);
 447               }
 448 #endif
 449
 450             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 451                 && XINT (in_rtx, i) >= 0
 452                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 453               fprintf (outfile, " {%s}", name);
 454             sawclose = 0;
 455           }
 456         break;
 457
 458       /* Print NOTE_INSN names rather than integer codes.  */
 459
 460       case 'n':
 461         if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
 462             && XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
 463           fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 464         else
 465           fprintf (outfile, " %d", XINT (in_rtx, i));
 466         sawclose = 0;
 467         break;
 468
 469       case 'u':
 470         if (XEXP (in_rtx, i) != NULL)
 471           {
 472             rtx sub = XEXP (in_rtx, i);
 473             enum rtx_code subc = GET_CODE (sub);
 474
 475             if (GET_CODE (in_rtx) == LABEL_REF)
 476               {
 477                 if (subc == NOTE
 478                     && NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
 479                   {
 480                     if (flag_dump_unnumbered)
 481                       fprintf (outfile, " [# deleted]");
 482                     else
 483                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 484                     sawclose = 0;
 485                     break;
 486                   }
 487
 488                 if (subc != CODE_LABEL)
 489                   goto do_e;
 490               }
 491
 492             if (flag_dump_unnumbered)
 493               fputs (" #", outfile);
 494             else
 495               fprintf (outfile, " %d", INSN_UID (sub));
 496           }
 497         else
 498           fputs (" 0", outfile);
 499         sawclose = 0;
 500         break;
 501
 502       case 'b':
 503 #ifndef GENERATOR_FILE
 504         if (XBITMAP (in_rtx, i) == NULL)
 505           fputs (" {null}", outfile);
 506         else
 507           bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
 508 #endif
 509         sawclose = 0;
 510         break;
 511
 512       case 't':
 513         fprintf (outfile, " " HOST_PTR_PRINTF, (void *) XTREE (in_rtx, i));
 514         break;
 515
 516       case '*':
 517         fputs (" Unknown", outfile);
 518         sawclose = 0;
 519         break;
 520
 521       case 'B':
 522 #ifndef GENERATOR_FILE
 523         if (XBBDEF (in_rtx, i))
 524           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 525 #endif
 526         break;
 527
 528       default:
 529         fprintf (stderr,
 530                  "switch format wrong in rtl.print_rtx(). format was: %c.\n",
 531                  format_ptr[-1]);
 532         abort ();
 533       }
 534
 535   switch (GET_CODE (in_rtx))
 536     {
 537 #ifndef GENERATOR_FILE
 538     case MEM:
 539       fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
 540
 541       if (MEM_EXPR (in_rtx))
 542         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 543
 544       if (MEM_OFFSET (in_rtx))
 545         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 546                  INTVAL (MEM_OFFSET (in_rtx)));
 547
 548       if (MEM_SIZE (in_rtx))
 549         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 550                  INTVAL (MEM_SIZE (in_rtx)));
 551
 552       if (MEM_ALIGN (in_rtx) != 1)
 553         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 554
 555       fputc (']', outfile);
 556       break;
 557
 558     case CONST_DOUBLE:
 559       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 560         {
 561           char s[60];
 562
 563           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 564                            sizeof (s), 0, 1);
 565           fprintf (outfile, " %s", s);
 566
 567           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 568                                sizeof (s), 0, 1);
 569           fprintf (outfile, " [%s]", s);
 570         }
 571       break;
 572 #endif
 573
 574     case CODE_LABEL:
 575       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 576       switch (LABEL_KIND (in_rtx))
 577         {
 578           case LABEL_NORMAL: break;
 579           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 580           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 581           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 582           default: abort();
 583         }
 584       break;
 585
 586     default:
 587       break;
 588     }
 589
 590   if (dump_for_graph
 591       && (is_insn || NOTE_P (in_rtx)
 592           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 593     sawclose = 0;
 594   else
 595     {
 596       fputc (')', outfile);
 597       sawclose = 1;
 598     }
 599 }
 600
 601 /* Print an rtx on the current line of FILE.  Initially indent IND
 602    characters.  */
 603
 604 void
 605 print_inline_rtx (FILE *outf, rtx x, int ind)
 606 {
 607   int oldsaw = sawclose;
 608   int oldindent = indent;
 609
 610   sawclose = 0;
 611   indent = ind;
 612   outfile = outf;
 613   print_rtx (x);
 614   sawclose = oldsaw;
 615   indent = oldindent;
 616 }
 617
 618 /* Call this function from the debugger to see what X looks like.  */
 619
 620 void
 621 debug_rtx (rtx x)
 622 {
 623   outfile = stderr;
 624   sawclose = 0;
 625   print_rtx (x);
 626   fprintf (stderr, "\n");
 627 }
 628
 629 /* Count of rtx's to print with debug_rtx_list.
 630    This global exists because gdb user defined commands have no arguments.  */
 631
 632 int debug_rtx_count = 0;        /* 0 is treated as equivalent to 1 */
 633
 634 /* Call this function to print list from X on.
 635
 636    N is a count of the rtx's to print. Positive values print from the specified
 637    rtx on.  Negative values print a window around the rtx.
 638    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 639
 640 void
 641 debug_rtx_list (rtx x, int n)
 642 {
 643   int i,count;
 644   rtx insn;
 645
 646   count = n == 0 ? 1 : n < 0 ? -n : n;
 647
 648   /* If we are printing a window, back up to the start.  */
 649
 650   if (n < 0)
 651     for (i = count / 2; i > 0; i--)
 652       {
 653         if (PREV_INSN (x) == 0)
 654           break;
 655         x = PREV_INSN (x);
 656       }
 657
 658   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 659     {
 660       debug_rtx (insn);
 661       fprintf (stderr, "\n");
 662     }
 663 }
 664
 665 /* Call this function to print an rtx list from START to END inclusive.  */
 666
 667 void
 668 debug_rtx_range (rtx start, rtx end)
 669 {
 670   while (1)
 671     {
 672       debug_rtx (start);
 673       fprintf (stderr, "\n");
 674       if (!start || start == end)
 675         break;
 676       start = NEXT_INSN (start);
 677     }
 678 }
 679
 680 /* Call this function to search an rtx list to find one with insn uid UID,
 681    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 682    The found insn is returned to enable further debugging analysis.  */
 683
 684 rtx
 685 debug_rtx_find (rtx x, 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 (FILE *outf, rtx rtx_first)
 709 {
 710   rtx tmp_rtx;
 711
 712   outfile = outf;
 713   sawclose = 0;
 714
 715   if (rtx_first == 0)
 716     {
 717       fputs (print_rtx_head, outf);
 718       fputs ("(nil)\n", outf);
 719     }
 720   else
 721     switch (GET_CODE (rtx_first))
 722       {
 723       case INSN:
 724       case JUMP_INSN:
 725       case CALL_INSN:
 726       case NOTE:
 727       case CODE_LABEL:
 728       case BARRIER:
 729         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 730           if (! flag_dump_unnumbered
 731               || !NOTE_P (tmp_rtx) || NOTE_LINE_NUMBER (tmp_rtx) < 0)
 732             {
 733               fputs (print_rtx_head, outfile);
 734               print_rtx (tmp_rtx);
 735               fprintf (outfile, "\n");
 736             }
 737         break;
 738
 739       default:
 740         fputs (print_rtx_head, outfile);
 741         print_rtx (rtx_first);
 742       }
 743 }
 744
 745 /* Like print_rtx, except specify a file.  */
 746 /* Return nonzero if we actually printed anything.  */
 747
 748 int
 749 print_rtl_single (FILE *outf, rtx x)
 750 {
 751   outfile = outf;
 752   sawclose = 0;
 753   if (! flag_dump_unnumbered
 754       || !NOTE_P (x) || NOTE_LINE_NUMBER (x) < 0)
 755     {
 756       fputs (print_rtx_head, outfile);
 757       print_rtx (x);
 758       putc ('\n', outf);
 759       return 1;
 760     }
 761   return 0;
 762 }
 763
 764
 765 /* Like print_rtl except without all the detail; for example,
 766    if RTX is a CONST_INT then print in decimal format.  */
 767
 768 void
 769 print_simple_rtl (FILE *outf, rtx x)
 770 {
 771   flag_simple = 1;
 772   print_rtl (outf, x);
 773   flag_simple = 0;
 774 }