1 /* Allocate and read RTL for GNU C Compiler.
2 Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
33 #define obstack_chunk_alloc xmalloc
34 #define obstack_chunk_free free
37 /* Calculate the format for CONST_DOUBLE. This depends on the relative
38 widths of HOST_WIDE_INT and REAL_VALUE_TYPE.
40 We need to go out to e0wwwww, since REAL_ARITHMETIC assumes 16-bits
41 per element in REAL_VALUE_TYPE.
43 This is duplicated in gengenrtl.c.
45 A number of places assume that there are always at least two 'w'
46 slots in a CONST_DOUBLE, so we provide them even if one would suffice. */
48 #ifdef REAL_ARITHMETIC
49 # if MAX_LONG_DOUBLE_TYPE_SIZE == 96
51 (11*8 + HOST_BITS_PER_WIDE_INT)/HOST_BITS_PER_WIDE_INT
53 # if MAX_LONG_DOUBLE_TYPE_SIZE == 128
55 (19*8 + HOST_BITS_PER_WIDE_INT)/HOST_BITS_PER_WIDE_INT
57 # if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
59 (7*8 + HOST_BITS_PER_WIDE_INT)/HOST_BITS_PER_WIDE_INT
63 #endif /* REAL_ARITHMETIC */
66 # if HOST_BITS_PER_WIDE_INT*2 >= MAX_LONG_DOUBLE_TYPE_SIZE
69 # if HOST_BITS_PER_WIDE_INT*3 >= MAX_LONG_DOUBLE_TYPE_SIZE
72 # if HOST_BITS_PER_WIDE_INT*4 >= MAX_LONG_DOUBLE_TYPE_SIZE
77 #endif /* REAL_WIDTH */
80 # define CONST_DOUBLE_FORMAT "e0ww"
83 # define CONST_DOUBLE_FORMAT "e0ww"
86 # define CONST_DOUBLE_FORMAT "e0www"
89 # define CONST_DOUBLE_FORMAT "e0wwww"
92 # define CONST_DOUBLE_FORMAT "e0wwwww"
94 # define CONST_DOUBLE_FORMAT /* nothing - will cause syntax error */
101 /* Indexed by rtx code, gives number of operands for an rtx with that code.
102 Does NOT include rtx header data (code and links). */
104 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) sizeof FORMAT - 1 ,
106 const int rtx_length[NUM_RTX_CODE + 1] = {
112 /* Indexed by rtx code, gives the name of that kind of rtx, as a C string. */
114 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) NAME ,
116 const char * const rtx_name[] = {
117 #include "rtl.def" /* rtl expressions are documented here */
122 /* Indexed by machine mode, gives the name of that machine mode.
123 This name does not include the letters "mode". */
125 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) NAME,
127 const char * const mode_name[(int) MAX_MACHINE_MODE + 1] = {
128 #include "machmode.def"
129 /* Add an extra field to avoid a core dump if someone tries to convert
130 MAX_MACHINE_MODE to a string. */
136 /* Indexed by machine mode, gives the class mode for GET_MODE_CLASS. */
138 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) CLASS,
140 const enum mode_class mode_class[(int) MAX_MACHINE_MODE] = {
141 #include "machmode.def"
146 /* Indexed by machine mode, gives the length of the mode, in bits.
147 GET_MODE_BITSIZE uses this. */
149 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) BITSIZE,
151 const unsigned int mode_bitsize[(int) MAX_MACHINE_MODE] = {
152 #include "machmode.def"
157 /* Indexed by machine mode, gives the length of the mode, in bytes.
158 GET_MODE_SIZE uses this. */
160 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) SIZE,
162 const unsigned int mode_size[(int) MAX_MACHINE_MODE] = {
163 #include "machmode.def"
168 /* Indexed by machine mode, gives the length of the mode's subunit.
169 GET_MODE_UNIT_SIZE uses this. */
171 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) UNIT,
173 const unsigned int mode_unit_size[(int) MAX_MACHINE_MODE] = {
174 #include "machmode.def" /* machine modes are documented here */
179 /* Indexed by machine mode, gives next wider natural mode
180 (QI -> HI -> SI -> DI, etc.) Widening multiply instructions
183 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) \
184 (unsigned char) WIDER,
186 const unsigned char mode_wider_mode[(int) MAX_MACHINE_MODE] = {
187 #include "machmode.def" /* machine modes are documented here */
192 #define DEF_MACHMODE(SYM, NAME, CLASS, BITSIZE, SIZE, UNIT, WIDER) \
193 ((BITSIZE) >= HOST_BITS_PER_WIDE_INT) ? ~(unsigned HOST_WIDE_INT)0 : ((unsigned HOST_WIDE_INT) 1 << (BITSIZE)) - 1,
195 /* Indexed by machine mode, gives mask of significant bits in mode. */
197 const unsigned HOST_WIDE_INT mode_mask_array[(int) MAX_MACHINE_MODE] = {
198 #include "machmode.def"
201 /* Indexed by mode class, gives the narrowest mode for each class.
202 The Q modes are always of width 1 (2 for complex) - it is impossible
203 for any mode to be narrower.
205 Note that we use QImode instead of BImode for MODE_INT, since
206 otherwise the middle end will try to use it for bitfields in
207 structures and the like, which we do not want. Only the target
208 md file should generate BImode widgets. */
210 const enum machine_mode class_narrowest_mode[(int) MAX_MODE_CLASS] = {
211 /* MODE_RANDOM */ VOIDmode,
212 /* MODE_INT */ QImode,
213 /* MODE_FLOAT */ QFmode,
214 /* MODE_PARTIAL_INT */ PQImode,
215 /* MODE_CC */ CCmode,
216 /* MODE_COMPLEX_INT */ CQImode,
217 /* MODE_COMPLEX_FLOAT */ QCmode,
218 /* MODE_VECTOR_INT */ V2QImode,
219 /* MODE_VECTOR_FLOAT */ V2SFmode
223 /* Indexed by rtx code, gives a sequence of operand-types for
224 rtx's of that code. The sequence is a C string in which
225 each character describes one operand. */
227 const char * const rtx_format[] = {
229 can cause a warning message
230 "0" field is unused (or used in a phase-dependent manner)
234 "n" like "i", but prints entries from `note_insn_name'
235 "w" an integer of width HOST_BITS_PER_WIDE_INT
237 "s" a pointer to a string
239 "S" like "s", but optional:
240 the containing rtx may end before this operand
241 "e" a pointer to an rtl expression
242 prints the expression
243 "E" a pointer to a vector that points to a number of rtl expressions
244 prints a list of the rtl expressions
245 "V" like "E", but optional:
246 the containing rtx may end before this operand
247 "u" a pointer to another insn
248 prints the uid of the insn.
249 "b" is a pointer to a bitmap header.
250 "t" is a tree pointer. */
252 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) FORMAT ,
253 #include "rtl.def" /* rtl expressions are defined here */
257 /* Indexed by rtx code, gives a character representing the "class" of
258 that rtx code. See rtl.def for documentation on the defined classes. */
260 const char rtx_class[] = {
261 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) CLASS,
262 #include "rtl.def" /* rtl expressions are defined here */
266 /* Names for kinds of NOTEs and REG_NOTEs. */
268 const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS] =
270 "", "NOTE_INSN_DELETED",
271 "NOTE_INSN_BLOCK_BEG", "NOTE_INSN_BLOCK_END",
272 "NOTE_INSN_LOOP_BEG", "NOTE_INSN_LOOP_END",
273 "NOTE_INSN_LOOP_CONT", "NOTE_INSN_LOOP_VTOP",
274 "NOTE_INSN_FUNCTION_END", "NOTE_INSN_SETJMP",
275 "NOTE_INSN_PROLOGUE_END", "NOTE_INSN_EPILOGUE_BEG",
276 "NOTE_INSN_DELETED_LABEL", "NOTE_INSN_FUNCTION_BEG",
277 "NOTE_INSN_EH_REGION_BEG", "NOTE_INSN_EH_REGION_END",
278 "NOTE_INSN_REPEATED_LINE_NUMBER", "NOTE_INSN_RANGE_BEG",
279 "NOTE_INSN_RANGE_END", "NOTE_INSN_LIVE",
280 "NOTE_INSN_BASIC_BLOCK", "NOTE_INSN_EXPECTED_VALUE"
283 const char * const reg_note_name[] =
285 "", "REG_DEAD", "REG_INC", "REG_EQUIV", "REG_EQUAL",
286 "REG_WAS_0", "REG_RETVAL", "REG_LIBCALL", "REG_NONNEG",
287 "REG_NO_CONFLICT", "REG_UNUSED", "REG_CC_SETTER", "REG_CC_USER",
288 "REG_LABEL", "REG_DEP_ANTI", "REG_DEP_OUTPUT", "REG_BR_PROB",
289 "REG_EXEC_COUNT", "REG_NOALIAS", "REG_SAVE_AREA", "REG_BR_PRED",
290 "REG_FRAME_RELATED_EXPR", "REG_EH_CONTEXT", "REG_EH_REGION",
291 "REG_EH_RETHROW", "REG_SAVE_NOTE", "REG_MAYBE_DEAD", "REG_NORETURN",
295 static htab_t md_constants;
297 static void fatal_with_file_and_line PARAMS ((FILE *, const char *, ...))
298 ATTRIBUTE_PRINTF_2 ATTRIBUTE_NORETURN;
299 static void fatal_expected_char PARAMS ((FILE *, int, int)) ATTRIBUTE_NORETURN;
300 static void read_name PARAMS ((char *, FILE *));
301 static unsigned def_hash PARAMS ((const void *));
302 static int def_name_eq_p PARAMS ((const void *, const void *));
303 static void read_constants PARAMS ((FILE *infile, char *tmp_char));
306 /* Allocate an rtx vector of N elements.
307 Store the length, and initialize all elements to zero. */
315 rt = ggc_alloc_rtvec (n);
316 /* clear out the vector */
317 memset (&rt->elem[0], 0, n * sizeof (rtx));
319 PUT_NUM_ELEM (rt, n);
323 /* Allocate an rtx of code CODE. The CODE is stored in the rtx;
324 all the rest is initialized to zero. */
331 int n = GET_RTX_LENGTH (code);
333 rt = ggc_alloc_rtx (n);
335 /* We want to clear everything up to the FLD array. Normally, this
336 is one int, but we don't want to assume that and it isn't very
337 portable anyway; this is. */
339 memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));
345 /* Create a new copy of an rtx.
346 Recursively copies the operands of the rtx,
347 except for those few rtx codes that are sharable. */
355 register RTX_CODE code;
356 register const char *format_ptr;
358 code = GET_CODE (orig);
371 /* SCRATCH must be shared because they represent distinct values. */
376 /* CONST can be shared if it contains a SYMBOL_REF. If it contains
377 a LABEL_REF, it isn't sharable. */
378 if (GET_CODE (XEXP (orig, 0)) == PLUS
379 && GET_CODE (XEXP (XEXP (orig, 0), 0)) == SYMBOL_REF
380 && GET_CODE (XEXP (XEXP (orig, 0), 1)) == CONST_INT)
384 /* A MEM with a constant address is not sharable. The problem is that
385 the constant address may need to be reloaded. If the mem is shared,
386 then reloading one copy of this mem will cause all copies to appear
387 to have been reloaded. */
393 copy = rtx_alloc (code);
395 /* Copy the various flags, and other information. We assume that
396 all fields need copying, and then clear the fields that should
397 not be copied. That is the sensible default behavior, and forces
398 us to explicitly document why we are *not* copying a flag. */
399 memcpy (copy, orig, sizeof (struct rtx_def) - sizeof (rtunion));
401 /* We do not copy the USED flag, which is used as a mark bit during
402 walks over the RTL. */
405 /* We do not copy FRAME_RELATED for INSNs. */
406 if (GET_RTX_CLASS (code) == 'i')
407 copy->frame_related = 0;
408 copy->jump = orig->jump;
409 copy->call = orig->call;
411 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
413 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
415 copy->fld[i] = orig->fld[i];
416 switch (*format_ptr++)
419 if (XEXP (orig, i) != NULL)
420 XEXP (copy, i) = copy_rtx (XEXP (orig, i));
425 if (XVEC (orig, i) != NULL)
427 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
428 for (j = 0; j < XVECLEN (copy, i); j++)
429 XVECEXP (copy, i, j) = copy_rtx (XVECEXP (orig, i, j));
440 /* These are left unchanged. */
450 /* Similar to `copy_rtx' except that if MAY_SHARE is present, it is
451 placed in the result directly, rather than being copied. */
454 copy_most_rtx (orig, may_share)
456 register rtx may_share;
460 register RTX_CODE code;
461 register const char *format_ptr;
463 if (orig == may_share)
466 code = GET_CODE (orig);
483 copy = rtx_alloc (code);
484 PUT_MODE (copy, GET_MODE (orig));
485 copy->in_struct = orig->in_struct;
486 copy->volatil = orig->volatil;
487 copy->unchanging = orig->unchanging;
488 copy->integrated = orig->integrated;
490 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
492 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
494 switch (*format_ptr++)
497 XEXP (copy, i) = XEXP (orig, i);
498 if (XEXP (orig, i) != NULL && XEXP (orig, i) != may_share)
499 XEXP (copy, i) = copy_most_rtx (XEXP (orig, i), may_share);
503 XEXP (copy, i) = XEXP (orig, i);
508 XVEC (copy, i) = XVEC (orig, i);
509 if (XVEC (orig, i) != NULL)
511 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
512 for (j = 0; j < XVECLEN (copy, i); j++)
514 = copy_most_rtx (XVECEXP (orig, i, j), may_share);
519 XWINT (copy, i) = XWINT (orig, i);
524 XINT (copy, i) = XINT (orig, i);
528 XTREE (copy, i) = XTREE (orig, i);
533 XSTR (copy, i) = XSTR (orig, i);
537 /* Copy this through the wide int field; that's safest. */
538 X0WINT (copy, i) = X0WINT (orig, i);
548 /* Create a new copy of an rtx. Only copy just one level. */
550 shallow_copy_rtx (orig)
554 register RTX_CODE code = GET_CODE (orig);
555 register rtx copy = rtx_alloc (code);
557 PUT_MODE (copy, GET_MODE (orig));
558 copy->in_struct = orig->in_struct;
559 copy->volatil = orig->volatil;
560 copy->unchanging = orig->unchanging;
561 copy->integrated = orig->integrated;
563 for (i = 0; i < GET_RTX_LENGTH (code); i++)
564 copy->fld[i] = orig->fld[i];
569 /* This is 1 until after the rtl generation pass. */
570 int rtx_equal_function_value_matters;
572 /* Nonzero when we are generating CONCATs. */
573 int generating_concat_p;
575 /* Return 1 if X and Y are identical-looking rtx's.
576 This is the Lisp function EQUAL for rtx arguments. */
584 register enum rtx_code code;
585 register const char *fmt;
589 if (x == 0 || y == 0)
593 /* Rtx's of different codes cannot be equal. */
594 if (code != GET_CODE (y))
597 /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.
598 (REG:SI x) and (REG:HI x) are NOT equivalent. */
600 if (GET_MODE (x) != GET_MODE (y))
603 /* Some RTL can be compared nonrecursively. */
607 /* Until rtl generation is complete, don't consider a reference to the
608 return register of the current function the same as the return from a
609 called function. This eases the job of function integration. Once the
610 distinction is no longer needed, they can be considered equivalent. */
611 return (REGNO (x) == REGNO (y)
612 && (! rtx_equal_function_value_matters
613 || REG_FUNCTION_VALUE_P (x) == REG_FUNCTION_VALUE_P (y)));
616 return XEXP (x, 0) == XEXP (y, 0);
619 return XSTR (x, 0) == XSTR (y, 0);
630 /* Compare the elements. If any pair of corresponding elements
631 fail to match, return 0 for the whole things. */
633 fmt = GET_RTX_FORMAT (code);
634 for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
639 if (XWINT (x, i) != XWINT (y, i))
645 if (XINT (x, i) != XINT (y, i))
651 /* Two vectors must have the same length. */
652 if (XVECLEN (x, i) != XVECLEN (y, i))
655 /* And the corresponding elements must match. */
656 for (j = 0; j < XVECLEN (x, i); j++)
657 if (rtx_equal_p (XVECEXP (x, i, j), XVECEXP (y, i, j)) == 0)
662 if (rtx_equal_p (XEXP (x, i), XEXP (y, i)) == 0)
668 if (strcmp (XSTR (x, i), XSTR (y, i)))
673 /* These are just backpointers, so they don't matter. */
680 /* It is believed that rtx's at this level will never
681 contain anything but integers and other rtx's,
682 except for within LABEL_REFs and SYMBOL_REFs. */
690 /* Subroutines of read_rtx. */
692 /* The current line number for the file. */
693 int read_rtx_lineno = 1;
695 /* The filename for aborting with file and line. */
696 const char *read_rtx_filename = "<unknown>";
699 fatal_with_file_and_line VPARAMS ((FILE *infile, const char *msg, ...))
701 #ifndef ANSI_PROTOTYPES
712 #ifndef ANSI_PROTOTYPES
713 infile = va_arg (ap, FILE *);
714 msg = va_arg (ap, const char *);
717 fprintf (stderr, "%s:%d: ", read_rtx_filename, read_rtx_lineno);
718 vfprintf (stderr, msg, ap);
721 /* Gather some following context. */
722 for (i = 0; i < sizeof(context)-1; ++i)
727 if (c == '\r' || c == '\n')
733 fprintf (stderr, "%s:%d: following context is `%s'\n",
734 read_rtx_filename, read_rtx_lineno, context);
740 /* Dump code after printing a message. Used when read_rtx finds
744 fatal_expected_char (infile, expected_c, actual_c)
746 int expected_c, actual_c;
748 fatal_with_file_and_line (infile, "expected character `%c', found `%c'",
749 expected_c, actual_c);
752 /* Read chars from INFILE until a non-whitespace char
753 and return that. Comments, both Lisp style and C style,
754 are treated as whitespace.
755 Tools such as genflags use this function. */
758 read_skip_spaces (infile)
771 case ' ': case '\t': case '\f': case '\r':
777 while (c != '\n' && c != EOF);
786 fatal_expected_char (infile, '*', c);
789 while ((c = getc (infile)) && c != EOF)
793 else if (prevc == '*' && c == '/')
806 /* Read an rtx code name into the buffer STR[].
807 It is terminated by any of the punctuation chars of rtx printed syntax. */
810 read_name (str, infile)
817 c = read_skip_spaces(infile);
822 if (c == ' ' || c == '\n' || c == '\t' || c == '\f')
824 if (c == ':' || c == ')' || c == ']' || c == '"' || c == '/'
825 || c == '(' || c == '[')
834 fatal_with_file_and_line (infile, "missing name or number");
842 /* Do constant expansion. */
843 struct md_constant *def;
848 struct md_constant tmp_def;
851 def = htab_find (md_constants, &tmp_def);
860 /* Provide a version of a function to read a long long if the system does
862 #if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_LONG && !defined(HAVE_ATOLL) && !defined(HAVE_ATOQ)
868 HOST_WIDE_INT tmp_wide;
880 HOST_WIDE_INT new_wide = tmp_wide*10 + (*p - '0');
881 if (new_wide < tmp_wide)
883 /* Return INT_MAX equiv on overflow. */
884 tmp_wide = (~(unsigned HOST_WIDE_INT)0) >> 1;
892 tmp_wide = -tmp_wide;
897 /* Given a constant definition, return a hash code for its name. */
903 const char *string = ((const struct md_constant *)def)->name;
905 for (result = i = 0;*string++ != '\0'; i++)
906 result += ((unsigned char) *string << (i % CHAR_BIT));
910 /* Given two constant definitions, return true if they have the same name. */
912 def_name_eq_p (def1, def2)
913 const void *def1, *def2;
915 return ! strcmp (((const struct md_constant *)def1)->name,
916 ((const struct md_constant *)def2)->name);
919 /* INFILE is a FILE pointer to read text from. TMP_CHAR is a buffer suitable
920 to read a name or number into. Process a define_constants directive,
921 starting with the optional space after the "define_constants". */
923 read_constants (infile, tmp_char)
930 c = read_skip_spaces (infile);
932 fatal_expected_char (infile, '[', c);
935 defs = htab_create (32, def_hash, def_name_eq_p, (htab_del) 0);
936 /* Disable constant expansion during definition processing. */
938 while ( (c = read_skip_spaces (infile)) != ']')
940 struct md_constant *def;
944 fatal_expected_char (infile, '(', c);
945 def = xmalloc (sizeof (struct md_constant));
946 def->name = tmp_char;
947 read_name (tmp_char, infile);
948 entry_ptr = htab_find_slot (defs, def, TRUE);
950 def->name = xstrdup (tmp_char);
951 c = read_skip_spaces (infile);
953 read_name (tmp_char, infile);
956 def->value = xstrdup (tmp_char);
962 if (strcmp (def->value, tmp_char))
963 fatal_with_file_and_line (infile,
964 "redefinition of %s, was %s, now %s",
965 def->name, def->value, tmp_char);
967 c = read_skip_spaces (infile);
969 fatal_expected_char (infile, ')', c);
972 c = read_skip_spaces (infile);
974 fatal_expected_char (infile, ')', c);
977 /* For every constant definition, call CALLBACK with two arguments:
978 a pointer a pointer to the constant definition and INFO.
979 Stops when CALLBACK returns zero. */
981 traverse_md_constants (callback, info)
986 htab_traverse (md_constants, callback, info);
989 /* Read an rtx in printed representation from INFILE
990 and return an actual rtx in core constructed accordingly.
991 read_rtx is not used in the compiler proper, but rather in
992 the utilities gen*.c that construct C code from machine descriptions. */
998 register int i, j, list_counter;
1000 register const char *format_ptr;
1001 /* tmp_char is a buffer used for reading decimal integers
1002 and names of rtx types and machine modes.
1003 Therefore, 256 must be enough. */
1008 HOST_WIDE_INT tmp_wide;
1010 /* Obstack used for allocating RTL objects. */
1011 static struct obstack rtl_obstack;
1012 static int initialized;
1014 /* Linked list structure for making RTXs: */
1017 struct rtx_list *next;
1018 rtx value; /* Value of this node. */
1022 _obstack_begin (&rtl_obstack,0, 0,
1023 (void *(*) PARAMS ((long))) xmalloc,
1024 (void (*) PARAMS ((void *))) free);
1029 c = read_skip_spaces (infile); /* Should be open paren. */
1031 fatal_expected_char (infile, '(', c);
1033 read_name (tmp_char, infile);
1037 if (! strcmp (tmp_char, "define_constants"))
1039 read_constants (infile, tmp_char);
1042 for (i = 0; i < NUM_RTX_CODE; i++)
1043 if (! strcmp (tmp_char, GET_RTX_NAME (i)))
1045 tmp_code = (RTX_CODE) i; /* get value for name */
1049 if (tmp_code == UNKNOWN)
1050 fatal_with_file_and_line (infile, "unknown rtx code `%s'", tmp_char);
1052 /* (NIL) stands for an expression that isn't there. */
1053 if (tmp_code == NIL)
1055 /* Discard the closeparen. */
1056 while ((c = getc (infile)) && c != ')')
1062 /* If we end up with an insn expression then we free this space below. */
1063 return_rtx = rtx_alloc (tmp_code);
1064 format_ptr = GET_RTX_FORMAT (GET_CODE (return_rtx));
1066 /* If what follows is `: mode ', read it and
1067 store the mode in the rtx. */
1069 i = read_skip_spaces (infile);
1072 read_name (tmp_char, infile);
1073 for (j = 0; j < NUM_MACHINE_MODES; j++)
1074 if (! strcmp (GET_MODE_NAME (j), tmp_char))
1077 if (j == MAX_MACHINE_MODE)
1078 fatal_with_file_and_line (infile, "unknown mode `%s'", tmp_char);
1080 PUT_MODE (return_rtx, (enum machine_mode) j);
1085 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (return_rtx)); i++)
1086 switch (*format_ptr++)
1088 /* 0 means a field for internal use only.
1089 Don't expect it to be present in the input. */
1095 XEXP (return_rtx, i) = read_rtx (infile);
1099 /* 'V' is an optional vector: if a closeparen follows,
1100 just store NULL for this element. */
1101 c = read_skip_spaces (infile);
1105 XVEC (return_rtx, i) = 0;
1108 /* Now process the vector. */
1112 register struct rtx_list *next_rtx, *rtx_list_link;
1113 struct rtx_list *list_rtx = NULL;
1115 c = read_skip_spaces (infile);
1117 fatal_expected_char (infile, '[', c);
1119 /* add expressions to a list, while keeping a count */
1122 while ((c = read_skip_spaces (infile)) && c != ']')
1126 rtx_list_link = (struct rtx_list *)
1127 alloca (sizeof (struct rtx_list));
1128 rtx_list_link->value = read_rtx (infile);
1130 list_rtx = rtx_list_link;
1132 next_rtx->next = rtx_list_link;
1133 next_rtx = rtx_list_link;
1134 rtx_list_link->next = 0;
1136 /* get vector length and allocate it */
1137 XVEC (return_rtx, i) = (list_counter
1138 ? rtvec_alloc (list_counter) : NULL_RTVEC);
1139 if (list_counter > 0)
1141 next_rtx = list_rtx;
1142 for (j = 0; j < list_counter; j++,
1143 next_rtx = next_rtx->next)
1144 XVECEXP (return_rtx, i, j) = next_rtx->value;
1146 /* close bracket gotten */
1151 /* 'S' is an optional string: if a closeparen follows,
1152 just store NULL for this element. */
1153 c = read_skip_spaces (infile);
1157 XSTR (return_rtx, i) = 0;
1164 register char *stringbuf;
1165 int saw_anything = 0;
1167 c = read_skip_spaces (infile);
1171 c = read_skip_spaces (infile);
1174 fatal_expected_char (infile, '"', c);
1178 c = getc (infile); /* Read the string */
1183 c = getc (infile); /* Read the string */
1184 /* \; makes stuff for a C string constant containing
1188 obstack_grow (&rtl_obstack, "\\n\\t", 4);
1197 obstack_1grow (&rtl_obstack, c);
1201 /* For insn patterns, we want to provide a default name
1202 based on the file and line, like "*foo.md:12", if the
1203 given name is blank. These are only for define_insn and
1204 define_insn_and_split, to aid debugging. */
1207 && (GET_CODE (return_rtx) == DEFINE_INSN
1208 || GET_CODE (return_rtx) == DEFINE_INSN_AND_SPLIT))
1211 const char *fn = (read_rtx_filename ? read_rtx_filename : "rtx");
1213 for (slash = fn; *slash; slash ++)
1214 if (*slash == '/' || *slash == '\\' || *slash == ':')
1216 obstack_1grow (&rtl_obstack, '*');
1217 obstack_grow (&rtl_obstack, fn, strlen (fn));
1218 sprintf (line_name, ":%d", read_rtx_lineno);
1219 obstack_grow (&rtl_obstack, line_name, strlen (line_name));
1222 obstack_1grow (&rtl_obstack, 0);
1223 stringbuf = (char *) obstack_finish (&rtl_obstack);
1227 c = read_skip_spaces (infile);
1229 fatal_expected_char (infile, ')', c);
1231 XSTR (return_rtx, i) = stringbuf;
1236 read_name (tmp_char, infile);
1237 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
1238 tmp_wide = atoi (tmp_char);
1240 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
1241 tmp_wide = atol (tmp_char);
1243 /* Prefer atoll over atoq, since the former is in the ISO C99 standard.
1244 But prefer not to use our hand-rolled function above either. */
1245 #if defined(HAVE_ATOLL) || !defined(HAVE_ATOQ)
1246 tmp_wide = atoll (tmp_char);
1248 tmp_wide = atoq (tmp_char);
1252 XWINT (return_rtx, i) = tmp_wide;
1257 read_name (tmp_char, infile);
1258 tmp_int = atoi (tmp_char);
1259 XINT (return_rtx, i) = tmp_int;
1264 "switch format wrong in rtl.read_rtx(). format was: %c.\n",
1266 fprintf (stderr, "\tfile position: %ld\n", ftell (infile));
1270 c = read_skip_spaces (infile);
1272 fatal_expected_char (infile, ')', c);
1277 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
1279 rtl_check_failed_bounds (r, n, file, line, func)
1286 error ("RTL check: access of elt %d of `%s' with last elt %d",
1287 n, GET_RTX_NAME (GET_CODE (r)), GET_RTX_LENGTH (GET_CODE (r))-1);
1288 fancy_abort (file, line, func);
1292 rtl_check_failed_type1 (r, n, c1, file, line, func)
1300 error ("RTL check: expected elt %d type '%c', have '%c' (rtx %s)",
1301 n, c1, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)));
1302 fancy_abort (file, line, func);
1306 rtl_check_failed_type2 (r, n, c1, c2, file, line, func)
1315 error ("RTL check: expected elt %d type '%c' or '%c', have '%c' (rtx %s)",
1317 GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE(r)));
1318 fancy_abort (file, line, func);
1322 rtl_check_failed_code1 (r, code, file, line, func)
1329 error ("RTL check: expected code `%s', have `%s'",
1330 GET_RTX_NAME (code), GET_RTX_NAME (GET_CODE (r)));
1331 fancy_abort (file, line, func);
1335 rtl_check_failed_code2 (r, code1, code2, file, line, func)
1337 enum rtx_code code1, code2;
1342 error ("RTL check: expected code `%s' or `%s', have `%s'",
1343 GET_RTX_NAME (code1), GET_RTX_NAME (code2),
1344 GET_RTX_NAME (GET_CODE (r)));
1345 fancy_abort (file, line, func);
1348 /* XXX Maybe print the vector? */
1350 rtvec_check_failed_bounds (r, n, file, line, func)
1357 error ("RTL check: access of elt %d of vector with last elt %d",
1358 n, GET_NUM_ELEM (r)-1);
1359 fancy_abort (file, line, func);
1361 #endif /* ENABLE_RTL_CHECKING */