gcc/print-rtl.c

   1 /* Print RTL for GNU C Compiler.
   2    Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000, 2002, 2003
   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
  38 /* How to print out a register name.
  39    We don't use PRINT_REG because some definitions of PRINT_REG
  40    don't work here.  */
  41 #ifndef DEBUG_PRINT_REG
  42 #define DEBUG_PRINT_REG(RTX, CODE, FILE) \
  43   fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)])
  44 #endif
  45
  46 /* Array containing all of the register names */
  47
  48 #ifdef DEBUG_REGISTER_NAMES
  49 static const char * const debug_reg_names[] = DEBUG_REGISTER_NAMES;
  50 #define reg_names debug_reg_names
  51 #else
  52 const char * reg_names[] = REGISTER_NAMES;
  53 #endif
  54
  55 static FILE *outfile;
  56
  57 static int sawclose = 0;
  58
  59 static int indent;
  60
  61 static void print_rtx           PARAMS ((rtx));
  62
  63 /* String printed at beginning of each RTL when it is dumped.
  64    This string is set to ASM_COMMENT_START when the RTL is dumped in
  65    the assembly output file.  */
  66 const char *print_rtx_head = "";
  67
  68 /* Nonzero means suppress output of instruction numbers and line number
  69    notes in debugging dumps.
  70    This must be defined here so that programs like gencodes can be linked.  */
  71 int flag_dump_unnumbered = 0;
  72
  73 /* Nonzero means use simplified format without flags, modes, etc.  */
  74 int flag_simple = 0;
  75
  76 /* Nonzero if we are dumping graphical description.  */
  77 int dump_for_graph;
  78
  79 /* Nonzero to dump all call_placeholder alternatives.  */
  80 static int debug_call_placeholder_verbose;
  81
  82 void
  83 print_mem_expr (outfile, expr)
  84      FILE *outfile;
  85      tree expr;
  86 {
  87   if (TREE_CODE (expr) == COMPONENT_REF)
  88     {
  89       if (TREE_OPERAND (expr, 0))
  90         print_mem_expr (outfile, TREE_OPERAND (expr, 0));
  91       else
  92         fputs (" <variable>", outfile);
  93       if (DECL_NAME (TREE_OPERAND (expr, 1)))
  94         fprintf (outfile, ".%s",
  95                  IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
  96     }
  97   else if (TREE_CODE (expr) == INDIRECT_REF)
  98     {
  99       fputs (" (*", outfile);
 100       print_mem_expr (outfile, TREE_OPERAND (expr, 0));
 101       fputs (")", outfile);
 102     }
 103   else if (DECL_NAME (expr))
 104     fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
 105   else if (TREE_CODE (expr) == RESULT_DECL)
 106     fputs (" <result>", outfile);
 107   else
 108     fputs (" <anonymous>", outfile);
 109 }
 110
 111 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
 112
 113 static void
 114 print_rtx (in_rtx)
 115      rtx in_rtx;
 116 {
 117   int i = 0;
 118   int j;
 119   const char *format_ptr;
 120   int is_insn;
 121   rtx tem;
 122
 123   if (sawclose)
 124     {
 125       if (flag_simple)
 126         fputc (' ', outfile);
 127       else
 128         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 129       sawclose = 0;
 130     }
 131
 132   if (in_rtx == 0)
 133     {
 134       fputs ("(nil)", outfile);
 135       sawclose = 1;
 136       return;
 137     }
 138   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 139     {
 140        fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
 141        sawclose = 1;
 142        return;
 143     }
 144
 145   is_insn = INSN_P (in_rtx);
 146
 147   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 148      in separate nodes and therefore have to handle them special here.  */
 149   if (dump_for_graph
 150       && (is_insn || GET_CODE (in_rtx) == NOTE
 151           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 152     {
 153       i = 3;
 154       indent = 0;
 155     }
 156   else
 157     {
 158       /* Print name of expression code.  */
 159       if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
 160         fputc ('(', outfile);
 161       else
 162         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 163
 164       if (! flag_simple)
 165         {
 166           if (RTX_FLAG (in_rtx, in_struct))
 167             fputs ("/s", outfile);
 168
 169           if (RTX_FLAG (in_rtx, volatil))
 170             fputs ("/v", outfile);
 171
 172           if (RTX_FLAG (in_rtx, unchanging))
 173             fputs ("/u", outfile);
 174
 175           if (RTX_FLAG (in_rtx, integrated))
 176             fputs ("/i", outfile);
 177
 178           if (RTX_FLAG (in_rtx, frame_related))
 179             fputs ("/f", outfile);
 180
 181           if (RTX_FLAG (in_rtx, jump))
 182             fputs ("/j", outfile);
 183
 184           if (RTX_FLAG (in_rtx, call))
 185             fputs ("/c", outfile);
 186
 187           if (GET_MODE (in_rtx) != VOIDmode)
 188             {
 189               /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 190               if (GET_CODE (in_rtx) == EXPR_LIST
 191                   || GET_CODE (in_rtx) == INSN_LIST)
 192                 fprintf (outfile, ":%s",
 193                          GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 194               else
 195                 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 196             }
 197         }
 198     }
 199
 200 #ifndef GENERATOR_FILE
 201   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 202     i = 5;
 203 #endif
 204
 205   /* Get the format string and skip the first elements if we have handled
 206      them already.  */
 207   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 208   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 209     switch (*format_ptr++)
 210       {
 211         const char *str;
 212
 213       case 'T':
 214         str = XTMPL (in_rtx, i);
 215         goto string;
 216
 217       case 'S':
 218       case 's':
 219         str = XSTR (in_rtx, i);
 220       string:
 221
 222         if (str == 0)
 223           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 224         else
 225           {
 226             if (dump_for_graph)
 227               fprintf (outfile, " (\\\"%s\\\")", str);
 228             else
 229               fprintf (outfile, " (\"%s\")", str);
 230           }
 231         sawclose = 1;
 232         break;
 233
 234         /* 0 indicates a field for internal use that should not be printed.
 235            An exception is the third field of a NOTE, where it indicates
 236            that the field has several different valid contents.  */
 237       case '0':
 238         if (i == 1 && GET_CODE (in_rtx) == REG)
 239           {
 240             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 241               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 242           }
 243 #ifndef GENERATOR_FILE
 244         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 245           {
 246             int flags = SYMBOL_REF_FLAGS (in_rtx);
 247             if (flags)
 248               fprintf (outfile, " [flags 0x%x]", flags);
 249           }
 250         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 251           {
 252             tree decl = SYMBOL_REF_DECL (in_rtx);
 253             if (decl)
 254               print_node_brief (outfile, "", decl, 0);
 255           }
 256 #endif
 257         else if (i == 4 && GET_CODE (in_rtx) == NOTE)
 258           {
 259             switch (NOTE_LINE_NUMBER (in_rtx))
 260               {
 261               case NOTE_INSN_EH_REGION_BEG:
 262               case NOTE_INSN_EH_REGION_END:
 263                 if (flag_dump_unnumbered)
 264                   fprintf (outfile, " #");
 265                 else
 266                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 267                 sawclose = 1;
 268                 break;
 269
 270               case NOTE_INSN_BLOCK_BEG:
 271               case NOTE_INSN_BLOCK_END:
 272                 fprintf (outfile, " ");
 273                 if (flag_dump_unnumbered)
 274                   fprintf (outfile, "#");
 275                 else
 276                   fprintf (outfile, HOST_PTR_PRINTF,
 277                            (char *) NOTE_BLOCK (in_rtx));
 278                 sawclose = 1;
 279                 break;
 280
 281               case NOTE_INSN_BASIC_BLOCK:
 282                 {
 283                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 284                   if (bb != 0)
 285                     fprintf (outfile, " [bb %d]", bb->index);
 286                   break;
 287                 }
 288
 289               case NOTE_INSN_EXPECTED_VALUE:
 290                 indent += 2;
 291                 if (!sawclose)
 292                   fprintf (outfile, " ");
 293                 print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
 294                 indent -= 2;
 295                 break;
 296
 297               case NOTE_INSN_DELETED_LABEL:
 298                 if (NOTE_SOURCE_FILE (in_rtx))
 299                   fprintf (outfile, " (\"%s\")", NOTE_SOURCE_FILE (in_rtx));
 300                 else
 301                   fprintf (outfile, " \"\"");
 302                 break;
 303
 304               case NOTE_INSN_PREDICTION:
 305                 if (NOTE_PREDICTION (in_rtx))
 306                   fprintf (outfile, " [ %d %d ] ",
 307                            (int)NOTE_PREDICTION_ALG (in_rtx),
 308                            (int) NOTE_PREDICTION_FLAGS (in_rtx));
 309                 else
 310                   fprintf (outfile, " [ ERROR ]");
 311                 break;
 312
 313               default:
 314                 {
 315                   const char * const str = X0STR (in_rtx, i);
 316
 317                   if (NOTE_LINE_NUMBER (in_rtx) < 0)
 318                     ;
 319                   else if (str == 0)
 320                     fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 321                   else
 322                     {
 323                       if (dump_for_graph)
 324                         fprintf (outfile, " (\\\"%s\\\")", str);
 325                       else
 326                         fprintf (outfile, " (\"%s\")", str);
 327                     }
 328                   break;
 329                 }
 330               }
 331           }
 332         break;
 333
 334       case 'e':
 335       do_e:
 336         indent += 2;
 337         if (!sawclose)
 338           fprintf (outfile, " ");
 339         print_rtx (XEXP (in_rtx, i));
 340         indent -= 2;
 341         break;
 342
 343       case 'E':
 344       case 'V':
 345         indent += 2;
 346         if (sawclose)
 347           {
 348             fprintf (outfile, "\n%s%*s",
 349                      print_rtx_head, indent * 2, "");
 350             sawclose = 0;
 351           }
 352         fputs (" [", outfile);
 353         if (NULL != XVEC (in_rtx, i))
 354           {
 355             indent += 2;
 356             if (XVECLEN (in_rtx, i))
 357               sawclose = 1;
 358
 359             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 360               print_rtx (XVECEXP (in_rtx, i, j));
 361
 362             indent -= 2;
 363           }
 364         if (sawclose)
 365           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 366
 367         fputs ("]", outfile);
 368         sawclose = 1;
 369         indent -= 2;
 370         break;
 371
 372       case 'w':
 373         if (! flag_simple)
 374           fprintf (outfile, " ");
 375         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 376         if (! flag_simple)
 377           {
 378             fprintf (outfile, " [");
 379             fprintf (outfile, HOST_WIDE_INT_PRINT_HEX, XWINT (in_rtx, i));
 380             fprintf (outfile, "]");
 381           }
 382         break;
 383
 384       case 'i':
 385         if (i == 6 && GET_CODE (in_rtx) == NOTE)
 386           {
 387             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 388                other times often contains garbage from INSN->NOTE death.  */
 389             if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
 390               fprintf (outfile, " %d",  XINT (in_rtx, i));
 391           }
 392         else
 393           {
 394             int value = XINT (in_rtx, i);
 395             const char *name;
 396
 397             if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
 398               {
 399                 fputc (' ', outfile);
 400                 DEBUG_PRINT_REG (in_rtx, 0, outfile);
 401               }
 402             else if (GET_CODE (in_rtx) == REG
 403                      && value <= LAST_VIRTUAL_REGISTER)
 404               {
 405                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 406                   fprintf (outfile, " %d virtual-incoming-args", value);
 407                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 408                   fprintf (outfile, " %d virtual-stack-vars", value);
 409                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 410                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 411                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 412                   fprintf (outfile, " %d virtual-outgoing-args", value);
 413                 else if (value == VIRTUAL_CFA_REGNUM)
 414                   fprintf (outfile, " %d virtual-cfa", value);
 415                 else
 416                   fprintf (outfile, " %d virtual-reg-%d", value,
 417                            value-FIRST_VIRTUAL_REGISTER);
 418               }
 419             else if (flag_dump_unnumbered
 420                      && (is_insn || GET_CODE (in_rtx) == NOTE))
 421               fputc ('#', outfile);
 422             else
 423               fprintf (outfile, " %d", value);
 424
 425             if (GET_CODE (in_rtx) == REG && REG_ATTRS (in_rtx))
 426               {
 427                 fputs (" [", outfile);
 428                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 429                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 430                 if (REG_EXPR (in_rtx))
 431                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 432
 433                 if (REG_OFFSET (in_rtx))
 434                   {
 435                     fputc ('+', outfile);
 436                     fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 437                              REG_OFFSET (in_rtx));
 438                   }
 439                 fputs (" ]", outfile);
 440               }
 441
 442             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 443                 && XINT (in_rtx, i) >= 0
 444                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 445               fprintf (outfile, " {%s}", name);
 446             sawclose = 0;
 447           }
 448         break;
 449
 450       /* Print NOTE_INSN names rather than integer codes.  */
 451
 452       case 'n':
 453         if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
 454             && XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
 455           fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 456         else
 457           fprintf (outfile, " %d", XINT (in_rtx, i));
 458         sawclose = 0;
 459         break;
 460
 461       case 'u':
 462         if (XEXP (in_rtx, i) != NULL)
 463           {
 464             rtx sub = XEXP (in_rtx, i);
 465             enum rtx_code subc = GET_CODE (sub);
 466
 467             if (GET_CODE (in_rtx) == LABEL_REF)
 468               {
 469                 if (subc == NOTE
 470                     && NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
 471                   {
 472                     if (flag_dump_unnumbered)
 473                       fprintf (outfile, " [# deleted]");
 474                     else
 475                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 476                     sawclose = 0;
 477                     break;
 478                   }
 479
 480                 if (subc != CODE_LABEL)
 481                   goto do_e;
 482               }
 483
 484             if (flag_dump_unnumbered)
 485               fputs (" #", outfile);
 486             else
 487               fprintf (outfile, " %d", INSN_UID (sub));
 488           }
 489         else
 490           fputs (" 0", outfile);
 491         sawclose = 0;
 492         break;
 493
 494       case 'b':
 495         if (XBITMAP (in_rtx, i) == NULL)
 496           fputs (" {null}", outfile);
 497         else
 498           bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
 499         sawclose = 0;
 500         break;
 501
 502       case 't':
 503         putc (' ', outfile);
 504         fprintf (outfile, HOST_PTR_PRINTF, (char *) XTREE (in_rtx, i));
 505         break;
 506
 507       case '*':
 508         fputs (" Unknown", outfile);
 509         sawclose = 0;
 510         break;
 511
 512       case 'B':
 513         if (XBBDEF (in_rtx, i))
 514           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 515         break;
 516
 517       default:
 518         fprintf (stderr,
 519                  "switch format wrong in rtl.print_rtx(). format was: %c.\n",
 520                  format_ptr[-1]);
 521         abort ();
 522       }
 523
 524   switch (GET_CODE (in_rtx))
 525     {
 526 #ifndef GENERATOR_FILE
 527     case MEM:
 528       fputs (" [", outfile);
 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         {
 536           fputc ('+', outfile);
 537           fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 538                    INTVAL (MEM_OFFSET (in_rtx)));
 539         }
 540
 541       if (MEM_SIZE (in_rtx))
 542         {
 543           fputs (" S", outfile);
 544           fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
 545                    INTVAL (MEM_SIZE (in_rtx)));
 546         }
 547
 548       if (MEM_ALIGN (in_rtx) != 1)
 549         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 550
 551       fputc (']', outfile);
 552       break;
 553
 554     case CONST_DOUBLE:
 555       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 556         {
 557           char s[60];
 558
 559           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 560                            sizeof (s), 0, 1);
 561           fprintf (outfile, " %s", s);
 562
 563           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 564                                sizeof (s), 0, 1);
 565           fprintf (outfile, " [%s]", s);
 566         }
 567       break;
 568 #endif
 569
 570     case CODE_LABEL:
 571       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 572       switch (LABEL_KIND (in_rtx))
 573         {
 574           case LABEL_NORMAL: break;
 575           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 576           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 577           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 578           default: abort();
 579         }
 580       break;
 581
 582     case CALL_PLACEHOLDER:
 583       if (debug_call_placeholder_verbose)
 584         {
 585           fputs (" (cond [\n  (const_string \"normal\") (sequence [", outfile);
 586           for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 587             {
 588               fputs ("\n    ", outfile);
 589               print_inline_rtx (outfile, tem, 4);
 590             }
 591
 592           tem = XEXP (in_rtx, 1);
 593           if (tem)
 594             fputs ("\n    ])\n  (const_string \"tail_call\") (sequence [",
 595                    outfile);
 596           for (; tem != 0; tem = NEXT_INSN (tem))
 597             {
 598               fputs ("\n    ", outfile);
 599               print_inline_rtx (outfile, tem, 4);
 600             }
 601
 602           tem = XEXP (in_rtx, 2);
 603           if (tem)
 604             fputs ("\n    ])\n  (const_string \"tail_recursion\") (sequence [",
 605                    outfile);
 606           for (; tem != 0; tem = NEXT_INSN (tem))
 607             {
 608               fputs ("\n    ", outfile);
 609               print_inline_rtx (outfile, tem, 4);
 610             }
 611
 612           fputs ("\n    ])\n  ])", outfile);
 613           break;
 614         }
 615
 616       for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
 617         if (GET_CODE (tem) == CALL_INSN)
 618           {
 619             fprintf (outfile, " ");
 620             print_rtx (tem);
 621             break;
 622           }
 623       break;
 624
 625     default:
 626       break;
 627     }
 628
 629   if (dump_for_graph
 630       && (is_insn || GET_CODE (in_rtx) == NOTE
 631           || GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
 632     sawclose = 0;
 633   else
 634     {
 635       fputc (')', outfile);
 636       sawclose = 1;
 637     }
 638 }
 639
 640 /* Print an rtx on the current line of FILE.  Initially indent IND
 641    characters.  */
 642
 643 void
 644 print_inline_rtx (outf, x, ind)
 645      FILE *outf;
 646      rtx x;
 647      int ind;
 648 {
 649   int oldsaw = sawclose;
 650   int oldindent = indent;
 651
 652   sawclose = 0;
 653   indent = ind;
 654   outfile = outf;
 655   print_rtx (x);
 656   sawclose = oldsaw;
 657   indent = oldindent;
 658 }
 659
 660 /* Call this function from the debugger to see what X looks like.  */
 661
 662 void
 663 debug_rtx (x)
 664      rtx x;
 665 {
 666   outfile = stderr;
 667   sawclose = 0;
 668   print_rtx (x);
 669   fprintf (stderr, "\n");
 670 }
 671
 672 /* Count of rtx's to print with debug_rtx_list.
 673    This global exists because gdb user defined commands have no arguments.  */
 674
 675 int debug_rtx_count = 0;        /* 0 is treated as equivalent to 1 */
 676
 677 /* Call this function to print list from X on.
 678
 679    N is a count of the rtx's to print. Positive values print from the specified
 680    rtx on.  Negative values print a window around the rtx.
 681    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 682
 683 void
 684 debug_rtx_list (x, n)
 685      rtx x;
 686      int n;
 687 {
 688   int i,count;
 689   rtx insn;
 690
 691   count = n == 0 ? 1 : n < 0 ? -n : n;
 692
 693   /* If we are printing a window, back up to the start.  */
 694
 695   if (n < 0)
 696     for (i = count / 2; i > 0; i--)
 697       {
 698         if (PREV_INSN (x) == 0)
 699           break;
 700         x = PREV_INSN (x);
 701       }
 702
 703   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 704     {
 705       debug_rtx (insn);
 706       fprintf (stderr, "\n");
 707     }
 708 }
 709
 710 /* Call this function to print an rtx list from START to END inclusive.  */
 711
 712 void
 713 debug_rtx_range (start, end)
 714      rtx start, end;
 715 {
 716   while (1)
 717     {
 718       debug_rtx (start);
 719       fprintf (stderr, "\n");
 720       if (!start || start == end)
 721         break;
 722       start = NEXT_INSN (start);
 723     }
 724 }
 725
 726 /* Call this function to search an rtx list to find one with insn uid UID,
 727    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 728    The found insn is returned to enable further debugging analysis.  */
 729
 730 rtx
 731 debug_rtx_find (x, uid)
 732      rtx x;
 733      int uid;
 734 {
 735   while (x != 0 && INSN_UID (x) != uid)
 736     x = NEXT_INSN (x);
 737   if (x != 0)
 738     {
 739       debug_rtx_list (x, debug_rtx_count);
 740       return x;
 741     }
 742   else
 743     {
 744       fprintf (stderr, "insn uid %d not found\n", uid);
 745       return 0;
 746     }
 747 }
 748
 749 /* External entry point for printing a chain of insns
 750    starting with RTX_FIRST onto file OUTF.
 751    A blank line separates insns.
 752
 753    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 754
 755 void
 756 print_rtl (outf, rtx_first)
 757      FILE *outf;
 758      rtx rtx_first;
 759 {
 760   rtx tmp_rtx;
 761
 762   outfile = outf;
 763   sawclose = 0;
 764
 765   if (rtx_first == 0)
 766     {
 767       fputs (print_rtx_head, outf);
 768       fputs ("(nil)\n", outf);
 769     }
 770   else
 771     switch (GET_CODE (rtx_first))
 772       {
 773       case INSN:
 774       case JUMP_INSN:
 775       case CALL_INSN:
 776       case NOTE:
 777       case CODE_LABEL:
 778       case BARRIER:
 779         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 780           if (! flag_dump_unnumbered
 781               || GET_CODE (tmp_rtx) != NOTE || NOTE_LINE_NUMBER (tmp_rtx) < 0)
 782             {
 783               fputs (print_rtx_head, outfile);
 784               print_rtx (tmp_rtx);
 785               fprintf (outfile, "\n");
 786             }
 787         break;
 788
 789       default:
 790         fputs (print_rtx_head, outfile);
 791         print_rtx (rtx_first);
 792       }
 793 }
 794
 795 /* Like print_rtx, except specify a file.  */
 796 /* Return nonzero if we actually printed anything.  */
 797
 798 int
 799 print_rtl_single (outf, x)
 800      FILE *outf;
 801      rtx x;
 802 {
 803   outfile = outf;
 804   sawclose = 0;
 805   if (! flag_dump_unnumbered
 806       || GET_CODE (x) != NOTE || NOTE_LINE_NUMBER (x) < 0)
 807     {
 808       fputs (print_rtx_head, outfile);
 809       print_rtx (x);
 810       putc ('\n', outf);
 811       return 1;
 812     }
 813   return 0;
 814 }
 815
 816
 817 /* Like print_rtl except without all the detail; for example,
 818    if RTX is a CONST_INT then print in decimal format.  */
 819
 820 void
 821 print_simple_rtl (outf, x)
 822      FILE *outf;
 823      rtx x;
 824 {
 825   flag_simple = 1;
 826   print_rtl (outf, x);
 827   flag_simple = 0;
 828 }