gcc/sched-vis.c

   1 /* Instruction scheduling pass.
   2    Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   4    Contributed by Michael Tiemann (tiemann@cygnus.com) Enhanced by,
   5    and currently maintained by, Jim Wilson (wilson@cygnus.com)
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22 \f
  23 #include "config.h"
  24 #include "system.h"
  25 #include "coretypes.h"
  26 #include "tm.h"
  27 #include "rtl.h"
  28 #include "obstack.h"
  29 #include "hard-reg-set.h"
  30 #include "basic-block.h"
  31 #include "real.h"
  32 #include "insn-attr.h"
  33 #include "sched-int.h"
  34 #include "tree-pass.h"
  35
  36 static char *safe_concat (char *, char *, const char *);
  37
  38 #define BUF_LEN 2048
  39
  40 static char *
  41 safe_concat (char *buf, char *cur, const char *str)
  42 {
  43   char *end = buf + BUF_LEN - 2;        /* Leave room for null.  */
  44   int c;
  45
  46   if (cur > end)
  47     {
  48       *end = '\0';
  49       return end;
  50     }
  51
  52   while (cur < end && (c = *str++) != '\0')
  53     *cur++ = c;
  54
  55   *cur = '\0';
  56   return cur;
  57 }
  58
  59 /* This recognizes rtx, I classified as expressions.  These are always
  60    represent some action on values or results of other expression, that
  61    may be stored in objects representing values.  */
  62
  63 static void
  64 print_exp (char *buf, const_rtx x, int verbose)
  65 {
  66   char tmp[BUF_LEN];
  67   const char *st[4];
  68   char *cur = buf;
  69   const char *fun = (char *) 0;
  70   const char *sep;
  71   rtx op[4];
  72   int i;
  73
  74   for (i = 0; i < 4; i++)
  75     {
  76       st[i] = (char *) 0;
  77       op[i] = NULL_RTX;
  78     }
  79
  80   switch (GET_CODE (x))
  81     {
  82     case PLUS:
  83       op[0] = XEXP (x, 0);
  84       if (GET_CODE (XEXP (x, 1)) == CONST_INT
  85           && INTVAL (XEXP (x, 1)) < 0)
  86         {
  87           st[1] = "-";
  88           op[1] = GEN_INT (-INTVAL (XEXP (x, 1)));
  89         }
  90       else
  91         {
  92           st[1] = "+";
  93           op[1] = XEXP (x, 1);
  94         }
  95       break;
  96     case LO_SUM:
  97       op[0] = XEXP (x, 0);
  98       st[1] = "+low(";
  99       op[1] = XEXP (x, 1);
 100       st[2] = ")";
 101       break;
 102     case MINUS:
 103       op[0] = XEXP (x, 0);
 104       st[1] = "-";
 105       op[1] = XEXP (x, 1);
 106       break;
 107     case COMPARE:
 108       fun = "cmp";
 109       op[0] = XEXP (x, 0);
 110       op[1] = XEXP (x, 1);
 111       break;
 112     case NEG:
 113       st[0] = "-";
 114       op[0] = XEXP (x, 0);
 115       break;
 116     case MULT:
 117       op[0] = XEXP (x, 0);
 118       st[1] = "*";
 119       op[1] = XEXP (x, 1);
 120       break;
 121     case DIV:
 122       op[0] = XEXP (x, 0);
 123       st[1] = "/";
 124       op[1] = XEXP (x, 1);
 125       break;
 126     case UDIV:
 127       fun = "udiv";
 128       op[0] = XEXP (x, 0);
 129       op[1] = XEXP (x, 1);
 130       break;
 131     case MOD:
 132       op[0] = XEXP (x, 0);
 133       st[1] = "%";
 134       op[1] = XEXP (x, 1);
 135       break;
 136     case UMOD:
 137       fun = "umod";
 138       op[0] = XEXP (x, 0);
 139       op[1] = XEXP (x, 1);
 140       break;
 141     case SMIN:
 142       fun = "smin";
 143       op[0] = XEXP (x, 0);
 144       op[1] = XEXP (x, 1);
 145       break;
 146     case SMAX:
 147       fun = "smax";
 148       op[0] = XEXP (x, 0);
 149       op[1] = XEXP (x, 1);
 150       break;
 151     case UMIN:
 152       fun = "umin";
 153       op[0] = XEXP (x, 0);
 154       op[1] = XEXP (x, 1);
 155       break;
 156     case UMAX:
 157       fun = "umax";
 158       op[0] = XEXP (x, 0);
 159       op[1] = XEXP (x, 1);
 160       break;
 161     case NOT:
 162       st[0] = "!";
 163       op[0] = XEXP (x, 0);
 164       break;
 165     case AND:
 166       op[0] = XEXP (x, 0);
 167       st[1] = "&";
 168       op[1] = XEXP (x, 1);
 169       break;
 170     case IOR:
 171       op[0] = XEXP (x, 0);
 172       st[1] = "|";
 173       op[1] = XEXP (x, 1);
 174       break;
 175     case XOR:
 176       op[0] = XEXP (x, 0);
 177       st[1] = "^";
 178       op[1] = XEXP (x, 1);
 179       break;
 180     case ASHIFT:
 181       op[0] = XEXP (x, 0);
 182       st[1] = "<<";
 183       op[1] = XEXP (x, 1);
 184       break;
 185     case LSHIFTRT:
 186       op[0] = XEXP (x, 0);
 187       st[1] = " 0>>";
 188       op[1] = XEXP (x, 1);
 189       break;
 190     case ASHIFTRT:
 191       op[0] = XEXP (x, 0);
 192       st[1] = ">>";
 193       op[1] = XEXP (x, 1);
 194       break;
 195     case ROTATE:
 196       op[0] = XEXP (x, 0);
 197       st[1] = "<-<";
 198       op[1] = XEXP (x, 1);
 199       break;
 200     case ROTATERT:
 201       op[0] = XEXP (x, 0);
 202       st[1] = ">->";
 203       op[1] = XEXP (x, 1);
 204       break;
 205     case ABS:
 206       fun = "abs";
 207       op[0] = XEXP (x, 0);
 208       break;
 209     case SQRT:
 210       fun = "sqrt";
 211       op[0] = XEXP (x, 0);
 212       break;
 213     case FFS:
 214       fun = "ffs";
 215       op[0] = XEXP (x, 0);
 216       break;
 217     case EQ:
 218       op[0] = XEXP (x, 0);
 219       st[1] = "==";
 220       op[1] = XEXP (x, 1);
 221       break;
 222     case NE:
 223       op[0] = XEXP (x, 0);
 224       st[1] = "!=";
 225       op[1] = XEXP (x, 1);
 226       break;
 227     case GT:
 228       op[0] = XEXP (x, 0);
 229       st[1] = ">";
 230       op[1] = XEXP (x, 1);
 231       break;
 232     case GTU:
 233       fun = "gtu";
 234       op[0] = XEXP (x, 0);
 235       op[1] = XEXP (x, 1);
 236       break;
 237     case LT:
 238       op[0] = XEXP (x, 0);
 239       st[1] = "<";
 240       op[1] = XEXP (x, 1);
 241       break;
 242     case LTU:
 243       fun = "ltu";
 244       op[0] = XEXP (x, 0);
 245       op[1] = XEXP (x, 1);
 246       break;
 247     case GE:
 248       op[0] = XEXP (x, 0);
 249       st[1] = ">=";
 250       op[1] = XEXP (x, 1);
 251       break;
 252     case GEU:
 253       fun = "geu";
 254       op[0] = XEXP (x, 0);
 255       op[1] = XEXP (x, 1);
 256       break;
 257     case LE:
 258       op[0] = XEXP (x, 0);
 259       st[1] = "<=";
 260       op[1] = XEXP (x, 1);
 261       break;
 262     case LEU:
 263       fun = "leu";
 264       op[0] = XEXP (x, 0);
 265       op[1] = XEXP (x, 1);
 266       break;
 267     case SIGN_EXTRACT:
 268       fun = (verbose) ? "sign_extract" : "sxt";
 269       op[0] = XEXP (x, 0);
 270       op[1] = XEXP (x, 1);
 271       op[2] = XEXP (x, 2);
 272       break;
 273     case ZERO_EXTRACT:
 274       fun = (verbose) ? "zero_extract" : "zxt";
 275       op[0] = XEXP (x, 0);
 276       op[1] = XEXP (x, 1);
 277       op[2] = XEXP (x, 2);
 278       break;
 279     case SIGN_EXTEND:
 280       fun = (verbose) ? "sign_extend" : "sxn";
 281       op[0] = XEXP (x, 0);
 282       break;
 283     case ZERO_EXTEND:
 284       fun = (verbose) ? "zero_extend" : "zxn";
 285       op[0] = XEXP (x, 0);
 286       break;
 287     case FLOAT_EXTEND:
 288       fun = (verbose) ? "float_extend" : "fxn";
 289       op[0] = XEXP (x, 0);
 290       break;
 291     case TRUNCATE:
 292       fun = (verbose) ? "trunc" : "trn";
 293       op[0] = XEXP (x, 0);
 294       break;
 295     case FLOAT_TRUNCATE:
 296       fun = (verbose) ? "float_trunc" : "ftr";
 297       op[0] = XEXP (x, 0);
 298       break;
 299     case FLOAT:
 300       fun = (verbose) ? "float" : "flt";
 301       op[0] = XEXP (x, 0);
 302       break;
 303     case UNSIGNED_FLOAT:
 304       fun = (verbose) ? "uns_float" : "ufl";
 305       op[0] = XEXP (x, 0);
 306       break;
 307     case FIX:
 308       fun = "fix";
 309       op[0] = XEXP (x, 0);
 310       break;
 311     case UNSIGNED_FIX:
 312       fun = (verbose) ? "uns_fix" : "ufx";
 313       op[0] = XEXP (x, 0);
 314       break;
 315     case PRE_DEC:
 316       st[0] = "--";
 317       op[0] = XEXP (x, 0);
 318       break;
 319     case PRE_INC:
 320       st[0] = "++";
 321       op[0] = XEXP (x, 0);
 322       break;
 323     case POST_DEC:
 324       op[0] = XEXP (x, 0);
 325       st[1] = "--";
 326       break;
 327     case POST_INC:
 328       op[0] = XEXP (x, 0);
 329       st[1] = "++";
 330       break;
 331     case PRE_MODIFY:
 332       st[0] = "pre ";
 333       op[0] = XEXP (XEXP (x, 1), 0);
 334       st[1] = "+=";
 335       op[1] = XEXP (XEXP (x, 1), 1);
 336       break;
 337     case POST_MODIFY:
 338       st[0] = "post ";
 339       op[0] = XEXP (XEXP (x, 1), 0);
 340       st[1] = "+=";
 341       op[1] = XEXP (XEXP (x, 1), 1);
 342       break;
 343     case CALL:
 344       st[0] = "call ";
 345       op[0] = XEXP (x, 0);
 346       if (verbose)
 347         {
 348           st[1] = " argc:";
 349           op[1] = XEXP (x, 1);
 350         }
 351       break;
 352     case IF_THEN_ELSE:
 353       st[0] = "{(";
 354       op[0] = XEXP (x, 0);
 355       st[1] = ")?";
 356       op[1] = XEXP (x, 1);
 357       st[2] = ":";
 358       op[2] = XEXP (x, 2);
 359       st[3] = "}";
 360       break;
 361     case TRAP_IF:
 362       fun = "trap_if";
 363       op[0] = TRAP_CONDITION (x);
 364       break;
 365     case PREFETCH:
 366       fun = "prefetch";
 367       op[0] = XEXP (x, 0);
 368       op[1] = XEXP (x, 1);
 369       op[2] = XEXP (x, 2);
 370       break;
 371     case UNSPEC:
 372     case UNSPEC_VOLATILE:
 373       {
 374         cur = safe_concat (buf, cur, "unspec");
 375         if (GET_CODE (x) == UNSPEC_VOLATILE)
 376           cur = safe_concat (buf, cur, "/v");
 377         cur = safe_concat (buf, cur, "[");
 378         sep = "";
 379         for (i = 0; i < XVECLEN (x, 0); i++)
 380           {
 381             print_pattern (tmp, XVECEXP (x, 0, i), verbose);
 382             cur = safe_concat (buf, cur, sep);
 383             cur = safe_concat (buf, cur, tmp);
 384             sep = ",";
 385           }
 386         cur = safe_concat (buf, cur, "] ");
 387         sprintf (tmp, "%d", XINT (x, 1));
 388         cur = safe_concat (buf, cur, tmp);
 389       }
 390       break;
 391     default:
 392       /* If (verbose) debug_rtx (x);  */
 393       st[0] = GET_RTX_NAME (GET_CODE (x));
 394       break;
 395     }
 396
 397   /* Print this as a function?  */
 398   if (fun)
 399     {
 400       cur = safe_concat (buf, cur, fun);
 401       cur = safe_concat (buf, cur, "(");
 402     }
 403
 404   for (i = 0; i < 4; i++)
 405     {
 406       if (st[i])
 407         cur = safe_concat (buf, cur, st[i]);
 408
 409       if (op[i])
 410         {
 411           if (fun && i != 0)
 412             cur = safe_concat (buf, cur, ",");
 413
 414           print_value (tmp, op[i], verbose);
 415           cur = safe_concat (buf, cur, tmp);
 416         }
 417     }
 418
 419   if (fun)
 420     cur = safe_concat (buf, cur, ")");
 421 }               /* print_exp */
 422
 423 /* Prints rtxes, I customarily classified as values.  They're constants,
 424    registers, labels, symbols and memory accesses.  */
 425
 426 void
 427 print_value (char *buf, const_rtx x, int verbose)
 428 {
 429   char t[BUF_LEN];
 430   char *cur = buf;
 431
 432   switch (GET_CODE (x))
 433     {
 434     case CONST_INT:
 435       sprintf (t, HOST_WIDE_INT_PRINT_HEX,
 436                (unsigned HOST_WIDE_INT) INTVAL (x));
 437       cur = safe_concat (buf, cur, t);
 438       break;
 439     case CONST_DOUBLE:
 440       if (FLOAT_MODE_P (GET_MODE (x)))
 441         real_to_decimal (t, CONST_DOUBLE_REAL_VALUE (x), sizeof (t), 0, 1);
 442       else
 443         sprintf (t,
 444                  "<" HOST_WIDE_INT_PRINT_HEX "," HOST_WIDE_INT_PRINT_HEX ">",
 445                  (unsigned HOST_WIDE_INT) CONST_DOUBLE_LOW (x),
 446                  (unsigned HOST_WIDE_INT) CONST_DOUBLE_HIGH (x));
 447       cur = safe_concat (buf, cur, t);
 448       break;
 449     case CONST_FIXED:
 450       fixed_to_decimal (t, CONST_FIXED_VALUE (x), sizeof (t));
 451       cur = safe_concat (buf, cur, t);
 452       break;
 453     case CONST_STRING:
 454       cur = safe_concat (buf, cur, "\"");
 455       cur = safe_concat (buf, cur, XSTR (x, 0));
 456       cur = safe_concat (buf, cur, "\"");
 457       break;
 458     case SYMBOL_REF:
 459       cur = safe_concat (buf, cur, "`");
 460       cur = safe_concat (buf, cur, XSTR (x, 0));
 461       cur = safe_concat (buf, cur, "'");
 462       break;
 463     case LABEL_REF:
 464       sprintf (t, "L%d", INSN_UID (XEXP (x, 0)));
 465       cur = safe_concat (buf, cur, t);
 466       break;
 467     case CONST:
 468       print_value (t, XEXP (x, 0), verbose);
 469       cur = safe_concat (buf, cur, "const(");
 470       cur = safe_concat (buf, cur, t);
 471       cur = safe_concat (buf, cur, ")");
 472       break;
 473     case HIGH:
 474       print_value (t, XEXP (x, 0), verbose);
 475       cur = safe_concat (buf, cur, "high(");
 476       cur = safe_concat (buf, cur, t);
 477       cur = safe_concat (buf, cur, ")");
 478       break;
 479     case REG:
 480       if (REGNO (x) < FIRST_PSEUDO_REGISTER)
 481         {
 482           int c = reg_names[REGNO (x)][0];
 483           if (ISDIGIT (c))
 484             cur = safe_concat (buf, cur, "%");
 485
 486           cur = safe_concat (buf, cur, reg_names[REGNO (x)]);
 487         }
 488       else
 489         {
 490           sprintf (t, "r%d", REGNO (x));
 491           cur = safe_concat (buf, cur, t);
 492         }
 493       if (verbose
 494 #ifdef INSN_SCHEDULING
 495           && !current_sched_info
 496 #endif
 497          )
 498         {
 499           sprintf (t, ":%s", GET_MODE_NAME (GET_MODE (x)));
 500           cur = safe_concat (buf, cur, t);
 501         }
 502       break;
 503     case SUBREG:
 504       print_value (t, SUBREG_REG (x), verbose);
 505       cur = safe_concat (buf, cur, t);
 506       sprintf (t, "#%d", SUBREG_BYTE (x));
 507       cur = safe_concat (buf, cur, t);
 508       break;
 509     case SCRATCH:
 510       cur = safe_concat (buf, cur, "scratch");
 511       break;
 512     case CC0:
 513       cur = safe_concat (buf, cur, "cc0");
 514       break;
 515     case PC:
 516       cur = safe_concat (buf, cur, "pc");
 517       break;
 518     case MEM:
 519       print_value (t, XEXP (x, 0), verbose);
 520       cur = safe_concat (buf, cur, "[");
 521       cur = safe_concat (buf, cur, t);
 522       cur = safe_concat (buf, cur, "]");
 523       break;
 524     default:
 525       print_exp (t, x, verbose);
 526       cur = safe_concat (buf, cur, t);
 527       break;
 528     }
 529 }                               /* print_value */
 530
 531 /* The next step in insn detalization, its pattern recognition.  */
 532
 533 void
 534 print_pattern (char *buf, const_rtx x, int verbose)
 535 {
 536   char t1[BUF_LEN], t2[BUF_LEN], t3[BUF_LEN];
 537
 538   switch (GET_CODE (x))
 539     {
 540     case SET:
 541       print_value (t1, SET_DEST (x), verbose);
 542       print_value (t2, SET_SRC (x), verbose);
 543       sprintf (buf, "%s=%s", t1, t2);
 544       break;
 545     case RETURN:
 546       sprintf (buf, "return");
 547       break;
 548     case CALL:
 549       print_exp (buf, x, verbose);
 550       break;
 551     case CLOBBER:
 552       print_value (t1, XEXP (x, 0), verbose);
 553       sprintf (buf, "clobber %s", t1);
 554       break;
 555     case USE:
 556       print_value (t1, XEXP (x, 0), verbose);
 557       sprintf (buf, "use %s", t1);
 558       break;
 559     case COND_EXEC:
 560       if (GET_CODE (COND_EXEC_TEST (x)) == NE
 561           && XEXP (COND_EXEC_TEST (x), 1) == const0_rtx)
 562         print_value (t1, XEXP (COND_EXEC_TEST (x), 0), verbose);
 563       else if (GET_CODE (COND_EXEC_TEST (x)) == EQ
 564                && XEXP (COND_EXEC_TEST (x), 1) == const0_rtx)
 565         {
 566           t1[0] = '!';
 567           print_value (t1 + 1, XEXP (COND_EXEC_TEST (x), 0), verbose);
 568         }
 569       else
 570         print_value (t1, COND_EXEC_TEST (x), verbose);
 571       print_pattern (t2, COND_EXEC_CODE (x), verbose);
 572       sprintf (buf, "(%s) %s", t1, t2);
 573       break;
 574     case PARALLEL:
 575       {
 576         int i;
 577
 578         sprintf (t1, "{");
 579         for (i = 0; i < XVECLEN (x, 0); i++)
 580           {
 581             print_pattern (t2, XVECEXP (x, 0, i), verbose);
 582             sprintf (t3, "%s%s;", t1, t2);
 583             strcpy (t1, t3);
 584           }
 585         sprintf (buf, "%s}", t1);
 586       }
 587       break;
 588     case SEQUENCE:
 589       /* Should never see SEQUENCE codes until after reorg.  */
 590       gcc_unreachable ();
 591     case ASM_INPUT:
 592       sprintf (buf, "asm {%s}", XSTR (x, 0));
 593       break;
 594     case ADDR_VEC:
 595       break;
 596     case ADDR_DIFF_VEC:
 597       print_value (buf, XEXP (x, 0), verbose);
 598       break;
 599     case TRAP_IF:
 600       print_value (t1, TRAP_CONDITION (x), verbose);
 601       sprintf (buf, "trap_if %s", t1);
 602       break;
 603     case UNSPEC:
 604       {
 605         int i;
 606
 607         sprintf (t1, "unspec{");
 608         for (i = 0; i < XVECLEN (x, 0); i++)
 609           {
 610             print_pattern (t2, XVECEXP (x, 0, i), verbose);
 611             sprintf (t3, "%s%s;", t1, t2);
 612             strcpy (t1, t3);
 613           }
 614         sprintf (buf, "%s}", t1);
 615       }
 616       break;
 617     case UNSPEC_VOLATILE:
 618       {
 619         int i;
 620
 621         sprintf (t1, "unspec/v{");
 622         for (i = 0; i < XVECLEN (x, 0); i++)
 623           {
 624             print_pattern (t2, XVECEXP (x, 0, i), verbose);
 625             sprintf (t3, "%s%s;", t1, t2);
 626             strcpy (t1, t3);
 627           }
 628         sprintf (buf, "%s}", t1);
 629       }
 630       break;
 631     default:
 632       print_value (buf, x, verbose);
 633     }
 634 }                               /* print_pattern */
 635
 636 /* This is the main function in rtl visualization mechanism. It
 637    accepts an rtx and tries to recognize it as an insn, then prints it
 638    properly in human readable form, resembling assembler mnemonics.
 639    For every insn it prints its UID and BB the insn belongs too.
 640    (Probably the last "option" should be extended somehow, since it
 641    depends now on sched.c inner variables ...)  */
 642
 643 void
 644 print_insn (char *buf, const_rtx x, int verbose)
 645 {
 646   char t[BUF_LEN];
 647   const_rtx insn = x;
 648
 649   switch (GET_CODE (x))
 650     {
 651     case INSN:
 652       print_pattern (t, PATTERN (x), verbose);
 653 #ifdef INSN_SCHEDULING
 654       if (verbose && current_sched_info)
 655         sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (x, 1),
 656                  t);
 657       else
 658 #endif
 659         sprintf (buf, " %4d %s", INSN_UID (x), t);
 660       break;
 661     case JUMP_INSN:
 662       print_pattern (t, PATTERN (x), verbose);
 663 #ifdef INSN_SCHEDULING
 664       if (verbose && current_sched_info)
 665         sprintf (buf, "%s: jump %s", (*current_sched_info->print_insn) (x, 1),
 666                  t);
 667       else
 668 #endif
 669         sprintf (buf, " %4d %s", INSN_UID (x), t);
 670       break;
 671     case CALL_INSN:
 672       x = PATTERN (insn);
 673       if (GET_CODE (x) == PARALLEL)
 674         {
 675           x = XVECEXP (x, 0, 0);
 676           print_pattern (t, x, verbose);
 677         }
 678       else
 679         strcpy (t, "call <...>");
 680 #ifdef INSN_SCHEDULING
 681       if (verbose && current_sched_info)
 682         sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (insn, 1), t);
 683       else
 684 #endif
 685         sprintf (buf, " %4d %s", INSN_UID (insn), t);
 686       break;
 687     case CODE_LABEL:
 688       sprintf (buf, "L%d:", INSN_UID (x));
 689       break;
 690     case BARRIER:
 691       sprintf (buf, "i%4d: barrier", INSN_UID (x));
 692       break;
 693     case NOTE:
 694       sprintf (buf, " %4d %s", INSN_UID (x),
 695                GET_NOTE_INSN_NAME (NOTE_KIND (x)));
 696       break;
 697     default:
 698       sprintf (buf, "i%4d  <What %s?>", INSN_UID (x),
 699                GET_RTX_NAME (GET_CODE (x)));
 700     }
 701 }                               /* print_insn */
 702
 703 /* Emit a slim dump of X (an insn) to the file F, including any register
 704    note attached to the instruction.  */
 705 void
 706 dump_insn_slim (FILE *f, rtx x)
 707 {
 708   char t[BUF_LEN + 32];
 709   rtx note;
 710
 711   print_insn (t, x, 1);
 712   fputs (t, f);
 713   putc ('\n', f);
 714   if (INSN_P (x) && REG_NOTES (x))
 715     for (note = REG_NOTES (x); note; note = XEXP (note, 1))
 716       {
 717         print_value (t, XEXP (note, 0), 1);
 718         fprintf (f, "      %s: %s\n",
 719                  GET_REG_NOTE_NAME (REG_NOTE_KIND (note)), t);
 720       }
 721 }
 722
 723 /* Emit a slim dump of X (an insn) to stderr.  */
 724 void
 725 debug_insn_slim (rtx x)
 726 {
 727   dump_insn_slim (stderr, x);
 728 }
 729
 730 /* Provide a slim dump the instruction chain starting at FIRST to F, honoring
 731    the dump flags given in FLAGS.  Currently, TDF_BLOCKS and TDF_DETAILS
 732    include more information on the basic blocks.  */
 733 void
 734 print_rtl_slim_with_bb (FILE *f, rtx first, int flags)
 735 {
 736   print_rtl_slim (f, first, NULL, -1, flags);
 737 }
 738
 739 /* Same as above, but stop at LAST or when COUNT == 0.
 740    If COUNT < 0 it will stop only at LAST or NULL rtx.  */
 741 void
 742 print_rtl_slim (FILE *f, rtx first, rtx last, int count, int flags)
 743 {
 744   basic_block current_bb = NULL;
 745   rtx insn, tail;
 746
 747   tail = last ? NEXT_INSN (last) : NULL_RTX;
 748   for (insn = first;
 749        (insn != NULL) && (insn != tail) && (count != 0);
 750        insn = NEXT_INSN (insn))
 751     {
 752       if ((flags & TDF_BLOCKS)
 753           && (INSN_P (insn) || GET_CODE (insn) == NOTE)
 754           && BLOCK_FOR_INSN (insn)
 755           && !current_bb)
 756         {
 757           current_bb = BLOCK_FOR_INSN (insn);
 758           dump_bb_info (current_bb, true, false, flags, ";; ", f);
 759         }
 760
 761       dump_insn_slim (f, insn);
 762
 763       if ((flags & TDF_BLOCKS)
 764           && current_bb
 765           && insn == BB_END (current_bb))
 766         {
 767           dump_bb_info (current_bb, false, true, flags, ";; ", f);
 768           current_bb = NULL;
 769         }
 770       if (count > 0)
 771         count--;
 772     }
 773 }
 774
 775 void
 776 debug_bb_slim (struct basic_block_def *bb)
 777 {
 778   print_rtl_slim (stderr, BB_HEAD (bb), BB_END (bb), -1, 32);
 779 }
 780
 781 void
 782 debug_bb_n_slim (int n)
 783 {
 784   struct basic_block_def *bb = BASIC_BLOCK (n);
 785   debug_bb_slim (bb);
 786 }
 787