gcc/print-rtl.c

   1 /* Print RTL for GCC.
   2    Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000, 2002, 2003,
   3    2004, 2005, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  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 "flags.h"
  40 #include "hard-reg-set.h"
  41 #include "basic-block.h"
  42 #include "diagnostic.h"
  43 #include "tree-pretty-print.h"
  44 #include "cselib.h"
  45 #include "tree-pass.h"
  46 #endif
  47
  48 static FILE *outfile;
  49
  50 static int sawclose = 0;
  51
  52 static int indent;
  53
  54 static void print_rtx (const_rtx);
  55
  56 /* String printed at beginning of each RTL when it is dumped.
  57    This string is set to ASM_COMMENT_START when the RTL is dumped in
  58    the assembly output file.  */
  59 const char *print_rtx_head = "";
  60
  61 /* Nonzero means suppress output of instruction numbers
  62    in debugging dumps.
  63    This must be defined here so that programs like gencodes can be linked.  */
  64 int flag_dump_unnumbered = 0;
  65
  66 /* Nonzero means suppress output of instruction numbers for previous
  67    and next insns in debugging dumps.
  68    This must be defined here so that programs like gencodes can be linked.  */
  69 int flag_dump_unnumbered_links = 0;
  70
  71 /* Nonzero means use simplified format without flags, modes, etc.  */
  72 int flag_simple = 0;
  73
  74 /* Nonzero if we are dumping graphical description.  */
  75 int dump_for_graph;
  76
  77 #ifndef GENERATOR_FILE
  78 void
  79 print_mem_expr (FILE *outfile, const_tree expr)
  80 {
  81   fputc (' ', outfile);
  82   print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
  83 }
  84 #endif
  85
  86 /* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
  87
  88 static void
  89 print_rtx (const_rtx in_rtx)
  90 {
  91   int i = 0;
  92   int j;
  93   const char *format_ptr;
  94   int is_insn;
  95
  96   if (sawclose)
  97     {
  98       if (flag_simple)
  99         fputc (' ', outfile);
 100       else
 101         fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 102       sawclose = 0;
 103     }
 104
 105   if (in_rtx == 0)
 106     {
 107       fputs ("(nil)", outfile);
 108       sawclose = 1;
 109       return;
 110     }
 111   else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
 112     {
 113        fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
 114                 print_rtx_head, indent * 2, "");
 115        sawclose = 1;
 116        return;
 117     }
 118
 119   is_insn = INSN_P (in_rtx);
 120
 121   /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
 122      in separate nodes and therefore have to handle them special here.  */
 123   if (dump_for_graph
 124       && (is_insn || NOTE_P (in_rtx)
 125           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 126     {
 127       i = 3;
 128       indent = 0;
 129     }
 130   else
 131     {
 132       /* Print name of expression code.  */
 133       if (flag_simple && CONST_INT_P (in_rtx))
 134         fputc ('(', outfile);
 135       else
 136         fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
 137
 138       if (! flag_simple)
 139         {
 140           if (RTX_FLAG (in_rtx, in_struct))
 141             fputs ("/s", outfile);
 142
 143           if (RTX_FLAG (in_rtx, volatil))
 144             fputs ("/v", outfile);
 145
 146           if (RTX_FLAG (in_rtx, unchanging))
 147             fputs ("/u", outfile);
 148
 149           if (RTX_FLAG (in_rtx, frame_related))
 150             fputs ("/f", outfile);
 151
 152           if (RTX_FLAG (in_rtx, jump))
 153             fputs ("/j", outfile);
 154
 155           if (RTX_FLAG (in_rtx, call))
 156             fputs ("/c", outfile);
 157
 158           if (RTX_FLAG (in_rtx, return_val))
 159             fputs ("/i", outfile);
 160
 161           /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
 162           if ((GET_CODE (in_rtx) == EXPR_LIST
 163                || GET_CODE (in_rtx) == INSN_LIST)
 164               && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 165             fprintf (outfile, ":%s",
 166                      GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
 167
 168           /* For other rtl, print the mode if it's not VOID.  */
 169           else if (GET_MODE (in_rtx) != VOIDmode)
 170             fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 171
 172 #ifndef GENERATOR_FILE
 173           if (GET_CODE (in_rtx) == VAR_LOCATION)
 174             {
 175               if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
 176                 fputs (" <debug string placeholder>", outfile);
 177               else
 178                 print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
 179               fputc (' ', outfile);
 180               print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
 181               if (PAT_VAR_LOCATION_STATUS (in_rtx)
 182                   == VAR_INIT_STATUS_UNINITIALIZED)
 183                 fprintf (outfile, " [uninit]");
 184               sawclose = 1;
 185               i = GET_RTX_LENGTH (VAR_LOCATION);
 186             }
 187 #endif
 188         }
 189     }
 190
 191 #ifndef GENERATOR_FILE
 192   if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
 193     i = 5;
 194 #endif
 195
 196   /* Get the format string and skip the first elements if we have handled
 197      them already.  */
 198   format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
 199   for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
 200     switch (*format_ptr++)
 201       {
 202         const char *str;
 203
 204       case 'T':
 205         str = XTMPL (in_rtx, i);
 206         goto string;
 207
 208       case 'S':
 209       case 's':
 210         str = XSTR (in_rtx, i);
 211       string:
 212
 213         if (str == 0)
 214           fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
 215         else
 216           {
 217             if (dump_for_graph)
 218               fprintf (outfile, " (\\\"%s\\\")", str);
 219             else
 220               fprintf (outfile, " (\"%s\")", str);
 221           }
 222         sawclose = 1;
 223         break;
 224
 225         /* 0 indicates a field for internal use that should not be printed.
 226            An exception is the third field of a NOTE, where it indicates
 227            that the field has several different valid contents.  */
 228       case '0':
 229         if (i == 1 && REG_P (in_rtx))
 230           {
 231             if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
 232               fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
 233           }
 234 #ifndef GENERATOR_FILE
 235         else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
 236           {
 237             int flags = SYMBOL_REF_FLAGS (in_rtx);
 238             if (flags)
 239               fprintf (outfile, " [flags %#x]", flags);
 240           }
 241         else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
 242           {
 243             tree decl = SYMBOL_REF_DECL (in_rtx);
 244             if (decl)
 245               print_node_brief (outfile, "", decl, dump_flags);
 246           }
 247 #endif
 248         else if (i == 4 && NOTE_P (in_rtx))
 249           {
 250             switch (NOTE_KIND (in_rtx))
 251               {
 252               case NOTE_INSN_EH_REGION_BEG:
 253               case NOTE_INSN_EH_REGION_END:
 254                 if (flag_dump_unnumbered)
 255                   fprintf (outfile, " #");
 256                 else
 257                   fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
 258                 sawclose = 1;
 259                 break;
 260
 261               case NOTE_INSN_BLOCK_BEG:
 262               case NOTE_INSN_BLOCK_END:
 263 #ifndef GENERATOR_FILE
 264                 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
 265 #endif
 266                 sawclose = 1;
 267                 break;
 268
 269               case NOTE_INSN_BASIC_BLOCK:
 270                 {
 271 #ifndef GENERATOR_FILE
 272                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 273                   if (bb != 0)
 274                     fprintf (outfile, " [bb %d]", bb->index);
 275 #endif
 276                   break;
 277                 }
 278
 279               case NOTE_INSN_DELETED_LABEL:
 280                 {
 281                   const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
 282                   if (label)
 283                     fprintf (outfile, " (\"%s\")", label);
 284                   else
 285                     fprintf (outfile, " \"\"");
 286                 }
 287                 break;
 288
 289               case NOTE_INSN_SWITCH_TEXT_SECTIONS:
 290                 {
 291 #ifndef GENERATOR_FILE
 292                   basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
 293                   if (bb != 0)
 294                     fprintf (outfile, " [bb %d]", bb->index);
 295 #endif
 296                   break;
 297                 }
 298
 299               case NOTE_INSN_VAR_LOCATION:
 300 #ifndef GENERATOR_FILE
 301                 fputc (' ', outfile);
 302                 print_rtx (NOTE_VAR_LOCATION (in_rtx));
 303 #endif
 304                 break;
 305
 306               default:
 307                 break;
 308               }
 309           }
 310         else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
 311           /* Output the JUMP_LABEL reference.  */
 312           fprintf (outfile, "\n%s%*s -> %d", print_rtx_head, indent * 2, "",
 313                    INSN_UID (JUMP_LABEL (in_rtx)));
 314         else if (i == 0 && GET_CODE (in_rtx) == VALUE)
 315           {
 316 #ifndef GENERATOR_FILE
 317             cselib_val *val = CSELIB_VAL_PTR (in_rtx);
 318
 319             fprintf (outfile, " %u:%u", val->uid, val->hash);
 320             dump_addr (outfile, " @", in_rtx);
 321             dump_addr (outfile, "/", (void*)val);
 322 #endif
 323           }
 324         else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
 325           {
 326 #ifndef GENERATOR_FILE
 327             fprintf (outfile, " D#%i",
 328                      DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
 329 #endif
 330           }
 331         break;
 332
 333       case 'e':
 334       do_e:
 335         indent += 2;
 336         if (!sawclose)
 337           fprintf (outfile, " ");
 338         print_rtx (XEXP (in_rtx, i));
 339         indent -= 2;
 340         break;
 341
 342       case 'E':
 343       case 'V':
 344         indent += 2;
 345         if (sawclose)
 346           {
 347             fprintf (outfile, "\n%s%*s",
 348                      print_rtx_head, indent * 2, "");
 349             sawclose = 0;
 350           }
 351         fputs (" [", outfile);
 352         if (NULL != XVEC (in_rtx, i))
 353           {
 354             indent += 2;
 355             if (XVECLEN (in_rtx, i))
 356               sawclose = 1;
 357
 358             for (j = 0; j < XVECLEN (in_rtx, i); j++)
 359               print_rtx (XVECEXP (in_rtx, i, j));
 360
 361             indent -= 2;
 362           }
 363         if (sawclose)
 364           fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
 365
 366         fputs ("]", outfile);
 367         sawclose = 1;
 368         indent -= 2;
 369         break;
 370
 371       case 'w':
 372         if (! flag_simple)
 373           fprintf (outfile, " ");
 374         fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
 375         if (! flag_simple)
 376           fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
 377                    (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
 378         break;
 379
 380       case 'i':
 381         if (i == 4 && INSN_P (in_rtx))
 382           {
 383 #ifndef GENERATOR_FILE
 384             /*  Pretty-print insn locators.  Ignore scoping as it is mostly
 385                 redundant with line number information and do not print anything
 386                 when there is no location information available.  */
 387             if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
 388               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 389 #endif
 390           }
 391         else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
 392           {
 393 #ifndef GENERATOR_FILE
 394             fprintf (outfile, " %s:%i",
 395                      locator_file (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
 396                      locator_line (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 397 #endif
 398           }
 399         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 400           {
 401 #ifndef GENERATOR_FILE
 402             fprintf (outfile, " %s:%i",
 403                      locator_file (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
 404                      locator_line (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 405 #endif
 406           }
 407         else if (i == 6 && NOTE_P (in_rtx))
 408           {
 409             /* This field is only used for NOTE_INSN_DELETED_LABEL, and
 410                other times often contains garbage from INSN->NOTE death.  */
 411             if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL)
 412               fprintf (outfile, " %d",  XINT (in_rtx, i));
 413           }
 414 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
 415         else if (i == 1
 416                  && GET_CODE (in_rtx) == UNSPEC_VOLATILE
 417                  && XINT (in_rtx, 1) >= 0
 418                  && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
 419           fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
 420 #endif
 421 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
 422         else if (i == 1
 423                  && (GET_CODE (in_rtx) == UNSPEC
 424                      || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
 425                  && XINT (in_rtx, 1) >= 0
 426                  && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
 427           fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
 428 #endif
 429         else
 430           {
 431             int value = XINT (in_rtx, i);
 432             const char *name;
 433
 434 #ifndef GENERATOR_FILE
 435             if (REG_P (in_rtx) && value < FIRST_PSEUDO_REGISTER)
 436               fprintf (outfile, " %d %s", REGNO (in_rtx),
 437                        reg_names[REGNO (in_rtx)]);
 438             else if (REG_P (in_rtx)
 439                      && value <= LAST_VIRTUAL_REGISTER)
 440               {
 441                 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
 442                   fprintf (outfile, " %d virtual-incoming-args", value);
 443                 else if (value == VIRTUAL_STACK_VARS_REGNUM)
 444                   fprintf (outfile, " %d virtual-stack-vars", value);
 445                 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
 446                   fprintf (outfile, " %d virtual-stack-dynamic", value);
 447                 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
 448                   fprintf (outfile, " %d virtual-outgoing-args", value);
 449                 else if (value == VIRTUAL_CFA_REGNUM)
 450                   fprintf (outfile, " %d virtual-cfa", value);
 451                 else
 452                   fprintf (outfile, " %d virtual-reg-%d", value,
 453                            value-FIRST_VIRTUAL_REGISTER);
 454               }
 455             else
 456 #endif
 457               if (flag_dump_unnumbered
 458                      && (is_insn || NOTE_P (in_rtx)))
 459               fputc ('#', outfile);
 460             else
 461               fprintf (outfile, " %d", value);
 462
 463 #ifndef GENERATOR_FILE
 464             if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
 465               {
 466                 fputs (" [", outfile);
 467                 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
 468                   fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
 469                 if (REG_EXPR (in_rtx))
 470                   print_mem_expr (outfile, REG_EXPR (in_rtx));
 471
 472                 if (REG_OFFSET (in_rtx))
 473                   fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 474                            REG_OFFSET (in_rtx));
 475                 fputs (" ]", outfile);
 476               }
 477 #endif
 478
 479             if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
 480                 && XINT (in_rtx, i) >= 0
 481                 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
 482               fprintf (outfile, " {%s}", name);
 483             sawclose = 0;
 484           }
 485         break;
 486
 487       /* Print NOTE_INSN names rather than integer codes.  */
 488
 489       case 'n':
 490         fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
 491         sawclose = 0;
 492         break;
 493
 494       case 'u':
 495         if (XEXP (in_rtx, i) != NULL)
 496           {
 497             rtx sub = XEXP (in_rtx, i);
 498             enum rtx_code subc = GET_CODE (sub);
 499
 500             if (GET_CODE (in_rtx) == LABEL_REF)
 501               {
 502                 if (subc == NOTE
 503                     && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
 504                   {
 505                     if (flag_dump_unnumbered)
 506                       fprintf (outfile, " [# deleted]");
 507                     else
 508                       fprintf (outfile, " [%d deleted]", INSN_UID (sub));
 509                     sawclose = 0;
 510                     break;
 511                   }
 512
 513                 if (subc != CODE_LABEL)
 514                   goto do_e;
 515               }
 516
 517             if (flag_dump_unnumbered
 518                 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
 519                     && (INSN_P (in_rtx) || NOTE_P (in_rtx)
 520                         || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
 521               fputs (" #", outfile);
 522             else
 523               fprintf (outfile, " %d", INSN_UID (sub));
 524           }
 525         else
 526           fputs (" 0", outfile);
 527         sawclose = 0;
 528         break;
 529
 530       case 't':
 531 #ifndef GENERATOR_FILE
 532         dump_addr (outfile, " ", XTREE (in_rtx, i));
 533 #endif
 534         break;
 535
 536       case '*':
 537         fputs (" Unknown", outfile);
 538         sawclose = 0;
 539         break;
 540
 541       case 'B':
 542 #ifndef GENERATOR_FILE
 543         if (XBBDEF (in_rtx, i))
 544           fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
 545 #endif
 546         break;
 547
 548       default:
 549         gcc_unreachable ();
 550       }
 551
 552   switch (GET_CODE (in_rtx))
 553     {
 554 #ifndef GENERATOR_FILE
 555     case MEM:
 556       if (__builtin_expect (final_insns_dump_p, false))
 557         fprintf (outfile, " [");
 558       else
 559         fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
 560                  (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
 561
 562       if (MEM_EXPR (in_rtx))
 563         print_mem_expr (outfile, MEM_EXPR (in_rtx));
 564
 565       if (MEM_OFFSET (in_rtx))
 566         fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
 567                  INTVAL (MEM_OFFSET (in_rtx)));
 568
 569       if (MEM_SIZE (in_rtx))
 570         fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,
 571                  INTVAL (MEM_SIZE (in_rtx)));
 572
 573       if (MEM_ALIGN (in_rtx) != 1)
 574         fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
 575
 576       if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
 577         fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
 578
 579       fputc (']', outfile);
 580       break;
 581
 582     case CONST_DOUBLE:
 583       if (FLOAT_MODE_P (GET_MODE (in_rtx)))
 584         {
 585           char s[60];
 586
 587           real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 588                            sizeof (s), 0, 1);
 589           fprintf (outfile, " %s", s);
 590
 591           real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
 592                                sizeof (s), 0, 1);
 593           fprintf (outfile, " [%s]", s);
 594         }
 595       break;
 596 #endif
 597
 598     case CODE_LABEL:
 599       fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
 600       switch (LABEL_KIND (in_rtx))
 601         {
 602           case LABEL_NORMAL: break;
 603           case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
 604           case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
 605           case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
 606           default: gcc_unreachable ();
 607         }
 608       break;
 609
 610     default:
 611       break;
 612     }
 613
 614   if (dump_for_graph
 615       && (is_insn || NOTE_P (in_rtx)
 616           || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))
 617     sawclose = 0;
 618   else
 619     {
 620       fputc (')', outfile);
 621       sawclose = 1;
 622     }
 623 }
 624
 625 /* Print an rtx on the current line of FILE.  Initially indent IND
 626    characters.  */
 627
 628 void
 629 print_inline_rtx (FILE *outf, const_rtx x, int ind)
 630 {
 631   int oldsaw = sawclose;
 632   int oldindent = indent;
 633
 634   sawclose = 0;
 635   indent = ind;
 636   outfile = outf;
 637   print_rtx (x);
 638   sawclose = oldsaw;
 639   indent = oldindent;
 640 }
 641
 642 /* Call this function from the debugger to see what X looks like.  */
 643
 644 DEBUG_FUNCTION void
 645 debug_rtx (const_rtx x)
 646 {
 647   outfile = stderr;
 648   sawclose = 0;
 649   print_rtx (x);
 650   fprintf (stderr, "\n");
 651 }
 652
 653 /* Count of rtx's to print with debug_rtx_list.
 654    This global exists because gdb user defined commands have no arguments.  */
 655
 656 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
 657
 658 /* Call this function to print list from X on.
 659
 660    N is a count of the rtx's to print. Positive values print from the specified
 661    rtx on.  Negative values print a window around the rtx.
 662    EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */
 663
 664 DEBUG_FUNCTION void
 665 debug_rtx_list (const_rtx x, int n)
 666 {
 667   int i,count;
 668   const_rtx insn;
 669
 670   count = n == 0 ? 1 : n < 0 ? -n : n;
 671
 672   /* If we are printing a window, back up to the start.  */
 673
 674   if (n < 0)
 675     for (i = count / 2; i > 0; i--)
 676       {
 677         if (PREV_INSN (x) == 0)
 678           break;
 679         x = PREV_INSN (x);
 680       }
 681
 682   for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
 683     {
 684       debug_rtx (insn);
 685       fprintf (stderr, "\n");
 686     }
 687 }
 688
 689 /* Call this function to print an rtx list from START to END inclusive.  */
 690
 691 DEBUG_FUNCTION void
 692 debug_rtx_range (const_rtx start, const_rtx end)
 693 {
 694   while (1)
 695     {
 696       debug_rtx (start);
 697       fprintf (stderr, "\n");
 698       if (!start || start == end)
 699         break;
 700       start = NEXT_INSN (start);
 701     }
 702 }
 703
 704 /* Call this function to search an rtx list to find one with insn uid UID,
 705    and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
 706    The found insn is returned to enable further debugging analysis.  */
 707
 708 DEBUG_FUNCTION const_rtx
 709 debug_rtx_find (const_rtx x, int uid)
 710 {
 711   while (x != 0 && INSN_UID (x) != uid)
 712     x = NEXT_INSN (x);
 713   if (x != 0)
 714     {
 715       debug_rtx_list (x, debug_rtx_count);
 716       return x;
 717     }
 718   else
 719     {
 720       fprintf (stderr, "insn uid %d not found\n", uid);
 721       return 0;
 722     }
 723 }
 724
 725 /* External entry point for printing a chain of insns
 726    starting with RTX_FIRST onto file OUTF.
 727    A blank line separates insns.
 728
 729    If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
 730
 731 void
 732 print_rtl (FILE *outf, const_rtx rtx_first)
 733 {
 734   const_rtx tmp_rtx;
 735
 736   outfile = outf;
 737   sawclose = 0;
 738
 739   if (rtx_first == 0)
 740     {
 741       fputs (print_rtx_head, outf);
 742       fputs ("(nil)\n", outf);
 743     }
 744   else
 745     switch (GET_CODE (rtx_first))
 746       {
 747       case INSN:
 748       case JUMP_INSN:
 749       case CALL_INSN:
 750       case NOTE:
 751       case CODE_LABEL:
 752       case BARRIER:
 753         for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
 754           {
 755             fputs (print_rtx_head, outfile);
 756             print_rtx (tmp_rtx);
 757             fprintf (outfile, "\n");
 758           }
 759         break;
 760
 761       default:
 762         fputs (print_rtx_head, outfile);
 763         print_rtx (rtx_first);
 764       }
 765 }
 766
 767 /* Like print_rtx, except specify a file.  */
 768 /* Return nonzero if we actually printed anything.  */
 769
 770 int
 771 print_rtl_single (FILE *outf, const_rtx x)
 772 {
 773   outfile = outf;
 774   sawclose = 0;
 775   fputs (print_rtx_head, outfile);
 776   print_rtx (x);
 777   putc ('\n', outf);
 778   return 1;
 779 }
 780
 781
 782 /* Like print_rtl except without all the detail; for example,
 783    if RTX is a CONST_INT then print in decimal format.  */
 784
 785 void
 786 print_simple_rtl (FILE *outf, const_rtx x)
 787 {
 788   flag_simple = 1;
 789   print_rtl (outf, x);
 790   flag_simple = 0;
 791 }