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