gcc/rtl.c

   1 /* RTL utility routines.
   2    Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002
   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 #include "config.h"
  23 #include "system.h"
  24 #include "rtl.h"
  25 #include "real.h"
  26 #include "ggc.h"
  27 #include "errors.h"
  28
  29 \f
  30 /* Indexed by rtx code, gives number of operands for an rtx with that code.
  31    Does NOT include rtx header data (code and links).  */
  32
  33 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   sizeof FORMAT - 1 ,
  34
  35 const unsigned char rtx_length[NUM_RTX_CODE] = {
  36 #include "rtl.def"
  37 };
  38
  39 #undef DEF_RTL_EXPR
  40
  41 /* Indexed by rtx code, gives the name of that kind of rtx, as a C string.  */
  42
  43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   NAME ,
  44
  45 const char * const rtx_name[NUM_RTX_CODE] = {
  46 #include "rtl.def"              /* rtl expressions are documented here */
  47 };
  48
  49 #undef DEF_RTL_EXPR
  50
  51 /* Indexed by machine mode, gives the name of that machine mode.
  52    This name does not include the letters "mode".  */
  53
  54 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  NAME,
  55
  56 const char * const mode_name[NUM_MACHINE_MODES] = {
  57 #include "machmode.def"
  58 };
  59
  60 #undef DEF_MACHMODE
  61
  62 /* Indexed by machine mode, gives the class mode for GET_MODE_CLASS.  */
  63
  64 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  CLASS,
  65
  66 const enum mode_class mode_class[NUM_MACHINE_MODES] = {
  67 #include "machmode.def"
  68 };
  69
  70 #undef DEF_MACHMODE
  71
  72 /* Indexed by machine mode, gives the length of the mode, in bits.
  73    GET_MODE_BITSIZE uses this.  */
  74
  75 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  BITSIZE,
  76
  77 const unsigned short mode_bitsize[NUM_MACHINE_MODES] = {
  78 #include "machmode.def"
  79 };
  80
  81 #undef DEF_MACHMODE
  82
  83 /* Indexed by machine mode, gives the length of the mode, in bytes.
  84    GET_MODE_SIZE uses this.  */
  85
  86 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  SIZE,
  87
  88 const unsigned char mode_size[NUM_MACHINE_MODES] = {
  89 #include "machmode.def"
  90 };
  91
  92 #undef DEF_MACHMODE
  93
  94 /* Indexed by machine mode, gives the length of the mode's subunit.
  95    GET_MODE_UNIT_SIZE uses this.  */
  96
  97 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  UNIT,
  98
  99 const unsigned char mode_unit_size[NUM_MACHINE_MODES] = {
 100 #include "machmode.def"         /* machine modes are documented here */
 101 };
 102
 103 #undef DEF_MACHMODE
 104
 105 /* Indexed by machine mode, gives next wider natural mode
 106    (QI -> HI -> SI -> DI, etc.)  Widening multiply instructions
 107    use this.  */
 108
 109 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  \
 110   (unsigned char) WIDER,
 111
 112 const unsigned char mode_wider_mode[NUM_MACHINE_MODES] = {
 113 #include "machmode.def"         /* machine modes are documented here */
 114 };
 115
 116 #undef DEF_MACHMODE
 117
 118 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER)  \
 119   ((BITSIZE) >= HOST_BITS_PER_WIDE_INT) ? ~(unsigned HOST_WIDE_INT) 0 : ((unsigned HOST_WIDE_INT) 1 << (BITSIZE)) - 1,
 120
 121 /* Indexed by machine mode, gives mask of significant bits in mode.  */
 122
 123 const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES] = {
 124 #include "machmode.def"
 125 };
 126
 127 #undef DEF_MACHMODE
 128
 129 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER, INNER) INNER,
 130
 131 /* Indexed by machine mode, gives the mode of the inner elements in a
 132    vector type.  */
 133
 134 const enum machine_mode inner_mode_array[NUM_MACHINE_MODES] = {
 135 #include "machmode.def"
 136 };
 137
 138 /* Indexed by mode class, gives the narrowest mode for each class.
 139    The Q modes are always of width 1 (2 for complex) - it is impossible
 140    for any mode to be narrower.
 141
 142    Note that we use QImode instead of BImode for MODE_INT, since
 143    otherwise the middle end will try to use it for bitfields in
 144    structures and the like, which we do not want.  Only the target
 145    md file should generate BImode widgets.  */
 146
 147 const enum machine_mode class_narrowest_mode[(int) MAX_MODE_CLASS] = {
 148     /* MODE_RANDOM */           VOIDmode,
 149     /* MODE_INT */              QImode,
 150     /* MODE_FLOAT */            QFmode,
 151     /* MODE_PARTIAL_INT */      PQImode,
 152     /* MODE_CC */               CCmode,
 153     /* MODE_COMPLEX_INT */      CQImode,
 154     /* MODE_COMPLEX_FLOAT */    QCmode,
 155     /* MODE_VECTOR_INT */       V1DImode,
 156     /* MODE_VECTOR_FLOAT */     V2SFmode
 157 };
 158
 159
 160 /* Indexed by rtx code, gives a sequence of operand-types for
 161    rtx's of that code.  The sequence is a C string in which
 162    each character describes one operand.  */
 163
 164 const char * const rtx_format[NUM_RTX_CODE] = {
 165   /* "*" undefined.
 166          can cause a warning message
 167      "0" field is unused (or used in a phase-dependent manner)
 168          prints nothing
 169      "i" an integer
 170          prints the integer
 171      "n" like "i", but prints entries from `note_insn_name'
 172      "w" an integer of width HOST_BITS_PER_WIDE_INT
 173          prints the integer
 174      "s" a pointer to a string
 175          prints the string
 176      "S" like "s", but optional:
 177          the containing rtx may end before this operand
 178      "T" like "s", but treated specially by the RTL reader;
 179          only found in machine description patterns.
 180      "e" a pointer to an rtl expression
 181          prints the expression
 182      "E" a pointer to a vector that points to a number of rtl expressions
 183          prints a list of the rtl expressions
 184      "V" like "E", but optional:
 185          the containing rtx may end before this operand
 186      "u" a pointer to another insn
 187          prints the uid of the insn.
 188      "b" is a pointer to a bitmap header.
 189      "B" is a basic block pointer.
 190      "t" is a tree pointer.  */
 191
 192 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   FORMAT ,
 193 #include "rtl.def"              /* rtl expressions are defined here */
 194 #undef DEF_RTL_EXPR
 195 };
 196
 197 /* Indexed by rtx code, gives a character representing the "class" of
 198    that rtx code.  See rtl.def for documentation on the defined classes.  */
 199
 200 const char rtx_class[NUM_RTX_CODE] = {
 201 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   CLASS,
 202 #include "rtl.def"              /* rtl expressions are defined here */
 203 #undef DEF_RTL_EXPR
 204 };
 205
 206 /* Names for kinds of NOTEs and REG_NOTEs.  */
 207
 208 const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS] =
 209 {
 210   "", "NOTE_INSN_DELETED",
 211   "NOTE_INSN_BLOCK_BEG", "NOTE_INSN_BLOCK_END",
 212   "NOTE_INSN_LOOP_BEG", "NOTE_INSN_LOOP_END",
 213   "NOTE_INSN_LOOP_CONT", "NOTE_INSN_LOOP_VTOP",
 214   "NOTE_INSN_LOOP_END_TOP_COND", "NOTE_INSN_FUNCTION_END",
 215   "NOTE_INSN_PROLOGUE_END", "NOTE_INSN_EPILOGUE_BEG",
 216   "NOTE_INSN_DELETED_LABEL", "NOTE_INSN_FUNCTION_BEG",
 217   "NOTE_INSN_EH_REGION_BEG", "NOTE_INSN_EH_REGION_END",
 218   "NOTE_INSN_REPEATED_LINE_NUMBER",
 219   "NOTE_INSN_BASIC_BLOCK", "NOTE_INSN_EXPECTED_VALUE",
 220   "NOTE_INSN_PREDICTION"
 221 };
 222
 223 const char * const reg_note_name[] =
 224 {
 225   "", "REG_DEAD", "REG_INC", "REG_EQUIV", "REG_EQUAL",
 226   "REG_WAS_0", "REG_RETVAL", "REG_LIBCALL", "REG_NONNEG",
 227   "REG_NO_CONFLICT", "REG_UNUSED", "REG_CC_SETTER", "REG_CC_USER",
 228   "REG_LABEL", "REG_DEP_ANTI", "REG_DEP_OUTPUT", "REG_BR_PROB",
 229   "REG_EXEC_COUNT", "REG_NOALIAS", "REG_SAVE_AREA", "REG_BR_PRED",
 230   "REG_FRAME_RELATED_EXPR", "REG_EH_CONTEXT", "REG_EH_REGION",
 231   "REG_SAVE_NOTE", "REG_MAYBE_DEAD", "REG_NORETURN",
 232   "REG_NON_LOCAL_GOTO", "REG_SETJMP", "REG_ALWAYS_RETURN",
 233   "REG_VTABLE_REF"
 234 };
 235
 236 \f
 237 /* Allocate an rtx vector of N elements.
 238    Store the length, and initialize all elements to zero.  */
 239
 240 rtvec
 241 rtvec_alloc (n)
 242      int n;
 243 {
 244   rtvec rt;
 245
 246   rt = ggc_alloc_rtvec (n);
 247   /* clear out the vector */
 248   memset (&rt->elem[0], 0, n * sizeof (rtx));
 249
 250   PUT_NUM_ELEM (rt, n);
 251   return rt;
 252 }
 253
 254 /* Allocate an rtx of code CODE.  The CODE is stored in the rtx;
 255    all the rest is initialized to zero.  */
 256
 257 rtx
 258 rtx_alloc (code)
 259   RTX_CODE code;
 260 {
 261   rtx rt;
 262   int n = GET_RTX_LENGTH (code);
 263
 264   rt = ggc_alloc_rtx (n);
 265
 266   /* We want to clear everything up to the FLD array.  Normally, this
 267      is one int, but we don't want to assume that and it isn't very
 268      portable anyway; this is.  */
 269
 270   memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));
 271   PUT_CODE (rt, code);
 272   return rt;
 273 }
 274
 275 \f
 276 /* Create a new copy of an rtx.
 277    Recursively copies the operands of the rtx,
 278    except for those few rtx codes that are sharable.  */
 279
 280 rtx
 281 copy_rtx (orig)
 282      rtx orig;
 283 {
 284   rtx copy;
 285   int i, j;
 286   RTX_CODE code;
 287   const char *format_ptr;
 288
 289   code = GET_CODE (orig);
 290
 291   switch (code)
 292     {
 293     case REG:
 294     case QUEUED:
 295     case CONST_INT:
 296     case CONST_DOUBLE:
 297     case CONST_VECTOR:
 298     case SYMBOL_REF:
 299     case CODE_LABEL:
 300     case PC:
 301     case CC0:
 302     case SCRATCH:
 303       /* SCRATCH must be shared because they represent distinct values.  */
 304     case ADDRESSOF:
 305       return orig;
 306
 307     case CONST:
 308       /* CONST can be shared if it contains a SYMBOL_REF.  If it contains
 309          a LABEL_REF, it isn't sharable.  */
 310       if (GET_CODE (XEXP (orig, 0)) == PLUS
 311           && GET_CODE (XEXP (XEXP (orig, 0), 0)) == SYMBOL_REF
 312           && GET_CODE (XEXP (XEXP (orig, 0), 1)) == CONST_INT)
 313         return orig;
 314       break;
 315
 316       /* A MEM with a constant address is not sharable.  The problem is that
 317          the constant address may need to be reloaded.  If the mem is shared,
 318          then reloading one copy of this mem will cause all copies to appear
 319          to have been reloaded.  */
 320
 321     default:
 322       break;
 323     }
 324
 325   copy = rtx_alloc (code);
 326
 327   /* Copy the various flags, and other information.  We assume that
 328      all fields need copying, and then clear the fields that should
 329      not be copied.  That is the sensible default behavior, and forces
 330      us to explicitly document why we are *not* copying a flag.  */
 331   memcpy (copy, orig, sizeof (struct rtx_def) - sizeof (rtunion));
 332
 333   /* We do not copy the USED flag, which is used as a mark bit during
 334      walks over the RTL.  */
 335   RTX_FLAG (copy, used) = 0;
 336
 337   /* We do not copy FRAME_RELATED for INSNs.  */
 338   if (GET_RTX_CLASS (code) == 'i')
 339     RTX_FLAG (copy, frame_related) = 0;
 340   RTX_FLAG (copy, jump) = RTX_FLAG (orig, jump);
 341   RTX_FLAG (copy, call) = RTX_FLAG (orig, call);
 342
 343   format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
 344
 345   for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
 346     {
 347       copy->fld[i] = orig->fld[i];
 348       switch (*format_ptr++)
 349         {
 350         case 'e':
 351           if (XEXP (orig, i) != NULL)
 352             XEXP (copy, i) = copy_rtx (XEXP (orig, i));
 353           break;
 354
 355         case 'E':
 356         case 'V':
 357           if (XVEC (orig, i) != NULL)
 358             {
 359               XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
 360               for (j = 0; j < XVECLEN (copy, i); j++)
 361                 XVECEXP (copy, i, j) = copy_rtx (XVECEXP (orig, i, j));
 362             }
 363           break;
 364
 365         case 't':
 366         case 'w':
 367         case 'i':
 368         case 's':
 369         case 'S':
 370         case 'T':
 371         case 'u':
 372         case 'B':
 373         case '0':
 374           /* These are left unchanged.  */
 375           break;
 376
 377         default:
 378           abort ();
 379         }
 380     }
 381   return copy;
 382 }
 383
 384 /* Create a new copy of an rtx.  Only copy just one level.  */
 385
 386 rtx
 387 shallow_copy_rtx (orig)
 388      rtx orig;
 389 {
 390   RTX_CODE code = GET_CODE (orig);
 391   size_t n = GET_RTX_LENGTH (code);
 392   rtx copy = ggc_alloc_rtx (n);
 393
 394   memcpy (copy, orig,
 395           sizeof (struct rtx_def) + sizeof (rtunion) * (n - 1));
 396
 397   return copy;
 398 }
 399
 400 /* Return the alignment of MODE. This will be bounded by 1 and
 401    BIGGEST_ALIGNMENT.  */
 402
 403 unsigned int
 404 get_mode_alignment (mode)
 405      enum machine_mode mode;
 406 {
 407   unsigned int alignment;
 408
 409   if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT
 410       || GET_MODE_CLASS (mode) == MODE_COMPLEX_INT)
 411     alignment = GET_MODE_UNIT_SIZE (mode);
 412   else
 413     alignment = GET_MODE_SIZE (mode);
 414
 415   /* Extract the LSB of the size.  */
 416   alignment = alignment & -alignment;
 417   alignment *= BITS_PER_UNIT;
 418
 419   alignment = MIN (BIGGEST_ALIGNMENT, MAX (1, alignment));
 420   return alignment;
 421 }
 422 \f
 423 /* This is 1 until after the rtl generation pass.  */
 424 int rtx_equal_function_value_matters;
 425
 426 /* Nonzero when we are generating CONCATs.  */
 427 int generating_concat_p;
 428 \f
 429 /* Return 1 if X and Y are identical-looking rtx's.
 430    This is the Lisp function EQUAL for rtx arguments.  */
 431
 432 int
 433 rtx_equal_p (x, y)
 434      rtx x, y;
 435 {
 436   int i;
 437   int j;
 438   enum rtx_code code;
 439   const char *fmt;
 440
 441   if (x == y)
 442     return 1;
 443   if (x == 0 || y == 0)
 444     return 0;
 445
 446   code = GET_CODE (x);
 447   /* Rtx's of different codes cannot be equal.  */
 448   if (code != GET_CODE (y))
 449     return 0;
 450
 451   /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.
 452      (REG:SI x) and (REG:HI x) are NOT equivalent.  */
 453
 454   if (GET_MODE (x) != GET_MODE (y))
 455     return 0;
 456
 457   /* Some RTL can be compared nonrecursively.  */
 458   switch (code)
 459     {
 460     case REG:
 461       /* Until rtl generation is complete, don't consider a reference
 462          to the return register of the current function the same as
 463          the return from a called function.  This eases the job of
 464          function integration.  Once the distinction is no longer
 465          needed, they can be considered equivalent.  */
 466       return (REGNO (x) == REGNO (y)
 467               && (! rtx_equal_function_value_matters
 468                   || REG_FUNCTION_VALUE_P (x) == REG_FUNCTION_VALUE_P (y)));
 469
 470     case LABEL_REF:
 471       return XEXP (x, 0) == XEXP (y, 0);
 472
 473     case SYMBOL_REF:
 474       return XSTR (x, 0) == XSTR (y, 0);
 475
 476     case SCRATCH:
 477     case CONST_DOUBLE:
 478     case CONST_INT:
 479     case CONST_VECTOR:
 480       return 0;
 481
 482     default:
 483       break;
 484     }
 485
 486   /* Compare the elements.  If any pair of corresponding elements
 487      fail to match, return 0 for the whole things.  */
 488
 489   fmt = GET_RTX_FORMAT (code);
 490   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
 491     {
 492       switch (fmt[i])
 493         {
 494         case 'w':
 495           if (XWINT (x, i) != XWINT (y, i))
 496             return 0;
 497           break;
 498
 499         case 'n':
 500         case 'i':
 501           if (XINT (x, i) != XINT (y, i))
 502             return 0;
 503           break;
 504
 505         case 'V':
 506         case 'E':
 507           /* Two vectors must have the same length.  */
 508           if (XVECLEN (x, i) != XVECLEN (y, i))
 509             return 0;
 510
 511           /* And the corresponding elements must match.  */
 512           for (j = 0; j < XVECLEN (x, i); j++)
 513             if (rtx_equal_p (XVECEXP (x, i, j), XVECEXP (y, i, j)) == 0)
 514               return 0;
 515           break;
 516
 517         case 'e':
 518           if (rtx_equal_p (XEXP (x, i), XEXP (y, i)) == 0)
 519             return 0;
 520           break;
 521
 522         case 'S':
 523         case 's':
 524           if ((XSTR (x, i) || XSTR (y, i))
 525               && (! XSTR (x, i) || ! XSTR (y, i)
 526                   || strcmp (XSTR (x, i), XSTR (y, i))))
 527             return 0;
 528           break;
 529
 530         case 'u':
 531           /* These are just backpointers, so they don't matter.  */
 532           break;
 533
 534         case '0':
 535         case 't':
 536           break;
 537
 538           /* It is believed that rtx's at this level will never
 539              contain anything but integers and other rtx's,
 540              except for within LABEL_REFs and SYMBOL_REFs.  */
 541         default:
 542           abort ();
 543         }
 544     }
 545   return 1;
 546 }
 547 \f
 548 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
 549 void
 550 rtl_check_failed_bounds (r, n, file, line, func)
 551     rtx r;
 552     int n;
 553     const char *file;
 554     int line;
 555     const char *func;
 556 {
 557   internal_error
 558     ("RTL check: access of elt %d of `%s' with last elt %d in %s, at %s:%d",
 559      n, GET_RTX_NAME (GET_CODE (r)), GET_RTX_LENGTH (GET_CODE (r)) - 1,
 560      func, trim_filename (file), line);
 561 }
 562
 563 void
 564 rtl_check_failed_type1 (r, n, c1, file, line, func)
 565     rtx r;
 566     int n;
 567     int c1;
 568     const char *file;
 569     int line;
 570     const char *func;
 571 {
 572   internal_error
 573     ("RTL check: expected elt %d type '%c', have '%c' (rtx %s) in %s, at %s:%d",
 574      n, c1, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)),
 575      func, trim_filename (file), line);
 576 }
 577
 578 void
 579 rtl_check_failed_type2 (r, n, c1, c2, file, line, func)
 580     rtx r;
 581     int n;
 582     int c1;
 583     int c2;
 584     const char *file;
 585     int line;
 586     const char *func;
 587 {
 588   internal_error
 589     ("RTL check: expected elt %d type '%c' or '%c', have '%c' (rtx %s) in %s, at %s:%d",
 590      n, c1, c2, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)),
 591      func, trim_filename (file), line);
 592 }
 593
 594 void
 595 rtl_check_failed_code1 (r, code, file, line, func)
 596     rtx r;
 597     enum rtx_code code;
 598     const char *file;
 599     int line;
 600     const char *func;
 601 {
 602   internal_error ("RTL check: expected code `%s', have `%s' in %s, at %s:%d",
 603                   GET_RTX_NAME (code), GET_RTX_NAME (GET_CODE (r)), func,
 604                   trim_filename (file), line);
 605 }
 606
 607 void
 608 rtl_check_failed_code2 (r, code1, code2, file, line, func)
 609     rtx r;
 610     enum rtx_code code1, code2;
 611     const char *file;
 612     int line;
 613     const char *func;
 614 {
 615   internal_error
 616     ("RTL check: expected code `%s' or `%s', have `%s' in %s, at %s:%d",
 617      GET_RTX_NAME (code1), GET_RTX_NAME (code2), GET_RTX_NAME (GET_CODE (r)),
 618      func, trim_filename (file), line);
 619 }
 620
 621 /* XXX Maybe print the vector?  */
 622 void
 623 rtvec_check_failed_bounds (r, n, file, line, func)
 624     rtvec r;
 625     int n;
 626     const char *file;
 627     int line;
 628     const char *func;
 629 {
 630   internal_error
 631     ("RTL check: access of elt %d of vector with last elt %d in %s, at %s:%d",
 632      n, GET_NUM_ELEM (r) - 1, func, trim_filename (file), line);
 633 }
 634 #endif /* ENABLE_RTL_CHECKING */
 635
 636 #if defined ENABLE_RTL_FLAG_CHECKING
 637 void
 638 rtl_check_failed_flag (name, r, file, line, func)
 639     const char *name;
 640     rtx r;
 641     const char *file;
 642     int line;
 643     const char *func;
 644 {
 645   internal_error
 646     ("RTL flag check: %s used with unexpected rtx code `%s' in %s, at %s:%d",
 647      name, GET_RTX_NAME (GET_CODE (r)), func, trim_filename (file), line);
 648 }
 649 #endif /* ENABLE_RTL_FLAG_CHECKING */