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 /* Nonzero to dump all call_placeholder alternatives.  */
  64 static int debug_call_placeholder_verbose;
  65
  66 void
  67 print_mem_expr (FILE *outfile, tree expr)
  68 {
  69   if (TREE_CODE (expr) == COMPONENT_REF)
  70     {
  71       if (TREE_OPERAND (expr, 0))
  72         print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  73       else
  74         fputs (" <variable>", outfile);
  75       if (DECL_NAME (TREE_OPERAND (expr, 1)))
  76         fprintf (outfile, ".%s",
  77                  IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
  78     }
  79   else if (TREE_CODE (expr) == INDIRECT_REF)
  80     {
  81       fputs (" (*", outfile);
  82       print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  83       fputs (")", outfile);
  84     }
  85   else if (DECL_NAME (expr))
  86     fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
  87   else if (TREE_CODE (expr) == RESULT_DECL)
  88     fputs (" <result>", outfile);
  89   else
  90     fputs (" <anonymous>", outfile);
  91 }
  92
  93 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  94
  95 static void
  96 print_rtx (rtx in_rtx)
  97 {
  98   int i = 0;
  99   int j;
 100   const char *format_ptr;
 101   int is_insn;
 102   rtx tem;
 103
 104   if (sawclose)
 105     {
 106       if (flag_simple)
 107         fputc (' ', outfile);
 108       else
 109         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 110       sawclose = 0;
 111     }
 112
 113   if (in_rtx == 0)
 114     {
 115       fputs ("(nil)", outfile);
 116       sawclose = 1;
 117       return;
 118     }
 119   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 120     {
 121        fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
 122        sawclose = 1;
 123        return;
 124     }
 125
 126   is_insn = INSN_P (in_rtx);
 127
 128   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 129      in separate nodes and therefore have to handle them special here.  */
 130   if (dump_for_graph
 131       && (is_insn || GET_CODE (in_rtx) == NOTE
 132           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 133     {
 134       i = 3;
 135       indent = 0;
 136     }
 137   else
 138     {
 139       /* Print name of expression code.  */
 140       if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
 141         fputc ('(', outfile);
 142       else
 143         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 144
 145       if (! flag_simple)
 146         {
 147           if (RTX_FLAG (in_rtx, in_struct))
 148             fputs ("/s", outfile);
 149
 150           if (RTX_FLAG (in_rtx, volatil))
 151             fputs ("/v", outfile);
 152
 153           if (RTX_FLAG (in_rtx, unchanging))
 154             fputs ("/u", outfile);
 155
 156           if (RTX_FLAG (in_rtx, frame_related))
 157             fputs ("/f", outfile);
 158
 159           if (RTX_FLAG (in_rtx, jump))
 160             fputs ("/j", outfile);
 161
 162           if (RTX_FLAG (in_rtx, call))
 163             fputs ("/c", outfile);
 164
 165           if (RTX_FLAG (in_rtx, return_val))
 166             fputs ("/i", outfile);
 167
 168           if (GET_MODE (in_rtx) != VOIDmode)
 169             {
 170               /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 171               if (GET_CODE (in_rtx) == EXPR_LIST
 172                   || GET_CODE (in_rtx) == INSN_LIST)
 173                 fprintf (outfile, ":%s",
 174                          GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 175               else
 176                 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 177             }
 178         }
 179     }
 180
 181 #ifndef GENERATOR_FILE
 182   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 183     i = 5;
 184 #endif
 185
 186   /* Get the format string and skip the first elements if we have handled
 187      them already.  */
 188   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 189   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 190     switch (*format_ptr++)
 191       {
 192         const char *str;
 193
 194       case 'T':
 195         str = XTMPL (in_rtx, i);
 196         goto string;
 197
 198       case 'S':
 199       case 's':
 200         str = XSTR (in_rtx, i);
 201       string:
 202
 203         if (str == 0)
 204           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 205         else
 206           {
 207             if (dump_for_graph)
 208               fprintf (outfile, " (\\\"%s\\\")", str);
 209             else
 210               fprintf (outfile, " (\"%s\")", str);
 211           }
 212         sawclose = 1;
 213         break;
 214
 215         /* 0 indicates a field for internal use that should not be printed.
 216            An exception is the third field of a NOTE, where it indicates
 217            that the field has several different valid contents.  */
 218       case '0':
 219         if (i == 1 && GET_CODE (in_rtx) == REG)
 220           {
 221             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 222               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 223           }
 224 #ifndef GENERATOR_FILE
 225         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 226           {
 227             int flags = SYMBOL_REF_FLAGS (in_rtx);
 228             if (flags)
 229               fprintf (outfile, " [flags 0x%x]", flags);
 230           }
 231         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 232           {
 233             tree decl = SYMBOL_REF_DECL (in_rtx);
 234             if (decl)
 235               print_node_brief (outfile, "", decl, 0);
 236           }
 237 #endif
 238         else if (i == 4 && GET_CODE (in_rtx) == NOTE)
 239           {
 240             switch (NOTE_LINE_NUMBER (in_rtx))
 241               {
 242               case NOTE_INSN_EH_REGION_BEG:
 243               case NOTE_INSN_EH_REGION_END:
 244                 if (flag_dump_unnumbered)
 245                   fprintf (outfile, " #");
 246                 else
 247                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 248                 sawclose = 1;
 249                 break;
 250
 251               case NOTE_INSN_BLOCK_BEG:
 252               case NOTE_INSN_BLOCK_END:
 253                 fprintf (outfile, " ");
 254                 if (flag_dump_unnumbered)
 255                   fprintf (outfile, "#");
 256                 else
 257                   fprintf (outfile, HOST_PTR_PRINTF,
 258                            (char *) NOTE_BLOCK (in_rtx));
 259                 sawclose = 1;
 260                 break;
 261
 262               case NOTE_INSN_BASIC_BLOCK:
 263                 {
 264                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 265                   if (bb != 0)
 266                     fprintf (outfile, " [bb %d]", bb->index);
 267                   break;
 268                 }
 269
 270               case NOTE_INSN_EXPECTED_VALUE:
 271                 indent += 2;
 272                 if (!sawclose)
 273                   fprintf (outfile, " ");
 274                 print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
 275                 indent -= 2;
 276                 break;
 277
 278               case NOTE_INSN_DELETED_LABEL:
 279                 if (NOTE_SOURCE_FILE (in_rtx))
 280                   fprintf (outfile, " (\"%s\")", NOTE_SOURCE_FILE (in_rtx));
 281                 else
 282                   fprintf (outfile, " \"\"");
 283                 break;
 284
 285               case NOTE_INSN_PREDICTION:
 286                 if (NOTE_PREDICTION (in_rtx))
 287                   fprintf (outfile, " [ %d %d ] ",
 288                            (int)NOTE_PREDICTION_ALG (in_rtx),
 289                            (int) NOTE_PREDICTION_FLAGS (in_rtx));
 290                 else
 291                   fprintf (outfile, " [ ERROR ]");
 292                 break;
 293
 294               case NOTE_INSN_UNLIKELY_EXECUTED_CODE:
 295                 {
 296                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 297                   if (bb != 0)
 298                     fprintf (outfile, " [bb %d]", bb->index);
 299                   break;
 300                 }
 301
 302               case NOTE_INSN_VAR_LOCATION:
 303                 fprintf (outfile, " (");
 304                 print_mem_expr (outfile, NOTE_VAR_LOCATION_DECL (in_rtx));
 305                 fprintf (outfile, " ");
 306                 print_rtx (NOTE_VAR_LOCATION_LOC (in_rtx));
 307                 fprintf (outfile, ")");
 308                 break;
 309
 310               default:
 311                 {
 312                   const char * const str = X0STR (in_rtx, i);
 313
 314                   if (NOTE_LINE_NUMBER (in_rtx) < 0)
 315                     ;
 316                   else if (str == 0)
 317                     fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 318                   else
 319                     {
 320                       if (dump_for_graph)
 321                         fprintf (outfile, " (\\\"%s\\\")", str);
 322                       else
 323                         fprintf (outfile, " (\"%s\")", str);
 324                     }
 325                   break;
 326                 }
 327               }
 328           }
 329         break;
 330
 331       case 'e':
 332       do_e:
 333         indent += 2;
 334         if (!sawclose)
 335           fprintf (outfile, " ");
 336         print_rtx (XEXP (in_rtx, i));
 337         indent -= 2;
 338         break;
 339
 340       case 'E':
 341       case 'V':
 342         indent += 2;
 343         if (sawclose)
 344           {
 345             fprintf (outfile, "\n%s%*s",
 346                      print_rtx_head, indent * 2, "");
 347             sawclose = 0;
 348           }
 349         fputs (" [", outfile);
 350         if (NULL != XVEC (in_rtx, i))
 351           {
 352             indent += 2;
 353             if (XVECLEN (in_rtx, i))
 354               sawclose = 1;
 355
 356             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 357               print_rtx (XVECEXP (in_rtx, i, j));
 358
 359             indent -= 2;
 360           }
 361         if (sawclose)
 362           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 363
 364         fputs ("]", outfile);
 365         sawclose = 1;
 366         indent -= 2;
 367         break;
 368
 369       case 'w':
 370         if (! flag_simple)
 371           fprintf (outfile, " ");
 372         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 373         if (! flag_simple)
 374           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 375                    XWINT (in_rtx, i));
 376         break;
 377
 378       case 'i':
 379         if (i == 4 && INSN_P (in_rtx))
 380           {
 381 #ifndef GENERATOR_FILE
 382             /*  Pretty-print insn locators.  Ignore scoping as it is mostly
 383                 redundant with line number information and do not print anything
 384                 when there is no location information available.  */
 385             if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
 386               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 387 #endif
 388           }
 389         else if (i == 6 && GET_CODE (in_rtx) == NOTE)
 390           {
 391             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 392                other times often contains garbage from INSN->NOTE death.  */
 393             if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
 394               fprintf (outfile, " %d",  XINT (in_rtx, i));
 395           }
 396         else
 397           {
 398             int value = XINT (in_rtx, i);
 399             const char *name;
 400
 401 #ifndef GENERATOR_FILE
 402             if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
 403               fprintf (outfile, " %d %s", REGNO (in_rtx),
 404                        reg_names[REGNO (in_rtx)]);
 405             else if (GET_CODE (in_rtx) == REG
 406                      && value <= LAST_VIRTUAL_REGISTER)
 407               {
 408                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 409                   fprintf (outfile, " %d virtual-incoming-args", value);
 410                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 411                   fprintf (outfile, " %d virtual-stack-vars", value);
 412                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 413                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 414                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 415                   fprintf (outfile, " %d virtual-outgoing-args", value);
 416                 else if (value == VIRTUAL_CFA_REGNUM)
 417                   fprintf (outfile, " %d virtual-cfa", value);
 418                 else
 419                   fprintf (outfile, " %d virtual-reg-%d", value,
 420                            value-FIRST_VIRTUAL_REGISTER);
 421               }
 422             else
 423 #endif
 424               if (flag_dump_unnumbered
 425                      && (is_insn || GET_CODE (in_rtx) == NOTE))
 426               fputc ('#', outfile);
 427             else
 428               fprintf (outfile, " %d", value);
 429
 430             if (GET_CODE (in_rtx) == REG && REG_ATTRS (in_rtx))
 431               {
 432                 fputs (" [", outfile);
 433                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 434                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 435                 if (REG_EXPR (in_rtx))
 436                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 437
 438                 if (REG_OFFSET (in_rtx))
 439                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 440                            REG_OFFSET (in_rtx));
 441                 fputs (" ]", outfile);
 442               }
 443
 444             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 445                 && XINT (in_rtx, i) >= 0
 446                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 447               fprintf (outfile, " {%s}", name);
 448             sawclose = 0;
 449           }
 450         break;
 451
 452       /* Print NOTE_INSN names rather than integer codes.  */
 453
 454       case 'n':
 455         if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
 456             && XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
 457           fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 458         else
 459           fprintf (outfile, " %d", XINT (in_rtx, i));
 460         sawclose = 0;
 461         break;
 462
 463       case 'u':
 464         if (XEXP (in_rtx, i) != NULL)
 465           {
 466             rtx sub = XEXP (in_rtx, i);
 467             enum rtx_code subc = GET_CODE (sub);
 468
 469             if (GET_CODE (in_rtx) == LABEL_REF)
 470               {
 471                 if (subc == NOTE
 472                     && NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
 473                   {
 474                     if (flag_dump_unnumbered)
 475                       fprintf (outfile, " [# deleted]");
 476                     else
 477                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 478                     sawclose = 0;
 479                     break;
 480                   }
 481
 482                 if (subc != CODE_LABEL)
 483                   goto do_e;
 484               }
 485
 486             if (flag_dump_unnumbered)
 487               fputs (" #", outfile);
 488             else
 489               fprintf (outfile, " %d", INSN_UID (sub));
 490           }
 491         else
 492           fputs (" 0", outfile);
 493         sawclose = 0;
 494         break;
 495
 496       case 'b':
 497         if (XBITMAP (in_rtx, i) == NULL)
 498           fputs (" {null}", outfile);
 499         else
 500           bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
 501         sawclose = 0;
 502         break;
 503
 504       case 't':
 505         fprintf (outfile, " " HOST_PTR_PRINTF, (void *) XTREE (in_rtx, i));
 506         break;
 507
 508       case '*':
 509         fputs (" Unknown", outfile);
 510         sawclose = 0;
 511         break;
 512
 513       case 'B':
 514         if (XBBDEF (in_rtx, i))
 515           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 516         break;
 517
 518       default:
 519         fprintf (stderr,
 520                  "switch format wrong in rtl.print_rtx(). format was: %c.\n",
 521                  format_ptr[-1]);
 522         abort ();
 523       }
 524
 525   switch (GET_CODE (in_rtx))
 526     {
 527 #ifndef GENERATOR_FILE
 528     case MEM:
 529       fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
 530
 531       if (MEM_EXPR (in_rtx))
 532         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 533
 534       if (MEM_OFFSET (in_rtx))
 535         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 536                  INTVAL (MEM_OFFSET (in_rtx)));
 537
 538       if (MEM_SIZE (in_rtx))
 539         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 540                  INTVAL (MEM_SIZE (in_rtx)));
 541
 542       if (MEM_ALIGN (in_rtx) != 1)
 543         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 544
 545       fputc (']', outfile);
 546       break;
 547
 548     case CONST_DOUBLE:
 549       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 550         {
 551           char s[60];
 552
 553           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 554                            sizeof (s), 0, 1);
 555           fprintf (outfile, " %s", s);
 556
 557           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 558                                sizeof (s), 0, 1);
 559           fprintf (outfile, " [%s]", s);
 560         }
 561       break;
 562 #endif
 563
 564     case CODE_LABEL:
 565       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 566       switch (LABEL_KIND (in_rtx))
 567         {
 568           case LABEL_NORMAL: break;
 569           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 570           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 571           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 572           default: abort();
 573         }
 574       break;
 575
 576     case CALL_PLACEHOLDER:
 577       if (debug_call_placeholder_verbose)
 578         {
 579           fputs (" (cond [\n  (const_string \"normal\") (sequence [", outfile);
 580           for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 581             {
 582               fputs ("\n    ", outfile);
 583               print_inline_rtx (outfile, tem, 4);
 584             }
 585
 586           tem = XEXP (in_rtx, 1);
 587           if (tem)
 588             fputs ("\n    ])\n  (const_string \"tail_call\") (sequence [",
 589                    outfile);
 590           for (; tem != 0; tem = NEXT_INSN (tem))
 591             {
 592               fputs ("\n    ", outfile);
 593               print_inline_rtx (outfile, tem, 4);
 594             }
 595
 596           tem = XEXP (in_rtx, 2);
 597           if (tem)
 598             fputs ("\n    ])\n  (const_string \"tail_recursion\") (sequence [",
 599                    outfile);
 600           for (; tem != 0; tem = NEXT_INSN (tem))
 601             {
 602               fputs ("\n    ", outfile);
 603               print_inline_rtx (outfile, tem, 4);
 604             }
 605
 606           fputs ("\n    ])\n  ])", outfile);
 607           break;
 608         }
 609
 610       for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 611         if (GET_CODE (tem) == CALL_INSN)
 612           {
 613             fprintf (outfile, " ");
 614             print_rtx (tem);
 615             break;
 616           }
 617       break;
 618
 619     default:
 620       break;
 621     }
 622
 623   if (dump_for_graph
 624       && (is_insn || GET_CODE (in_rtx) == NOTE
 625           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 626     sawclose = 0;
 627   else
 628     {
 629       fputc (')', outfile);
 630       sawclose = 1;
 631     }
 632 }
 633
 634 /* Print an rtx on the current line of FILE.  Initially indent IND
 635    characters.  */
 636
 637 void
 638 print_inline_rtx (FILE *outf, rtx x, int ind)
 639 {
 640   int oldsaw = sawclose;
 641   int oldindent = indent;
 642
 643   sawclose = 0;
 644   indent = ind;
 645   outfile = outf;
 646   print_rtx (x);
 647   sawclose = oldsaw;
 648   indent = oldindent;
 649 }
 650
 651 /* Call this function from the debugger to see what X looks like.  */
 652
 653 void
 654 debug_rtx (rtx x)
 655 {
 656   outfile = stderr;
 657   sawclose = 0;
 658   print_rtx (x);
 659   fprintf (stderr, "\n");
 660 }
 661
 662 /* Count of rtx's to print with debug_rtx_list.
 663    This global exists because gdb user defined commands have no arguments.  */
 664
 665 int debug_rtx_count = 0;        /* 0 is treated as equivalent to 1 */
 666
 667 /* Call this function to print list from X on.
 668
 669    N is a count of the rtx's to print. Positive values print from the specified
 670    rtx on.  Negative values print a window around the rtx.
 671    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 672
 673 void
 674 debug_rtx_list (rtx x, int n)
 675 {
 676   int i,count;
 677   rtx insn;
 678
 679   count = n == 0 ? 1 : n < 0 ? -n : n;
 680
 681   /* If we are printing a window, back up to the start.  */
 682
 683   if (n < 0)
 684     for (i = count / 2; i > 0; i--)
 685       {
 686         if (PREV_INSN (x) == 0)
 687           break;
 688         x = PREV_INSN (x);
 689       }
 690
 691   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 692     {
 693       debug_rtx (insn);
 694       fprintf (stderr, "\n");
 695     }
 696 }
 697
 698 /* Call this function to print an rtx list from START to END inclusive.  */
 699
 700 void
 701 debug_rtx_range (rtx start, rtx end)
 702 {
 703   while (1)
 704     {
 705       debug_rtx (start);
 706       fprintf (stderr, "\n");
 707       if (!start || start == end)
 708         break;
 709       start = NEXT_INSN (start);
 710     }
 711 }
 712
 713 /* Call this function to search an rtx list to find one with insn uid UID,
 714    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 715    The found insn is returned to enable further debugging analysis.  */
 716
 717 rtx
 718 debug_rtx_find (rtx x, int uid)
 719 {
 720   while (x != 0 && INSN_UID (x) != uid)
 721     x = NEXT_INSN (x);
 722   if (x != 0)
 723     {
 724       debug_rtx_list (x, debug_rtx_count);
 725       return x;
 726     }
 727   else
 728     {
 729       fprintf (stderr, "insn uid %d not found\n", uid);
 730       return 0;
 731     }
 732 }
 733
 734 /* External entry point for printing a chain of insns
 735    starting with RTX_FIRST onto file OUTF.
 736    A blank line separates insns.
 737
 738    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 739
 740 void
 741 print_rtl (FILE *outf, rtx rtx_first)
 742 {
 743   rtx tmp_rtx;
 744
 745   outfile = outf;
 746   sawclose = 0;
 747
 748   if (rtx_first == 0)
 749     {
 750       fputs (print_rtx_head, outf);
 751       fputs ("(nil)\n", outf);
 752     }
 753   else
 754     switch (GET_CODE (rtx_first))
 755       {
 756       case INSN:
 757       case JUMP_INSN:
 758       case CALL_INSN:
 759       case NOTE:
 760       case CODE_LABEL:
 761       case BARRIER:
 762         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 763           if (! flag_dump_unnumbered
 764               || GET_CODE (tmp_rtx) != NOTE || NOTE_LINE_NUMBER (tmp_rtx) < 0)
 765             {
 766               fputs (print_rtx_head, outfile);
 767               print_rtx (tmp_rtx);
 768               fprintf (outfile, "\n");
 769             }
 770         break;
 771
 772       default:
 773         fputs (print_rtx_head, outfile);
 774         print_rtx (rtx_first);
 775       }
 776 }
 777
 778 /* Like print_rtx, except specify a file.  */
 779 /* Return nonzero if we actually printed anything.  */
 780
 781 int
 782 print_rtl_single (FILE *outf, rtx x)
 783 {
 784   outfile = outf;
 785   sawclose = 0;
 786   if (! flag_dump_unnumbered
 787       || GET_CODE (x) != NOTE || NOTE_LINE_NUMBER (x) < 0)
 788     {
 789       fputs (print_rtx_head, outfile);
 790       print_rtx (x);
 791       putc ('\n', outf);
 792       return 1;
 793     }
 794   return 0;
 795 }
 796
 797
 798 /* Like print_rtl except without all the detail; for example,
 799    if RTX is a CONST_INT then print in decimal format.  */
 800
 801 void
 802 print_simple_rtl (FILE *outf, rtx x)
 803 {
 804   flag_simple = 1;
 805   print_rtl (outf, x);
 806   flag_simple = 0;
 807 }