1 /* RTL utility routines.
2 Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GCC.
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 3, or (at your option) any later
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
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 /* This file is compiled twice: once for the generator programs
22 once for the compiler. */
30 #include "coretypes.h"
42 /* Indexed by rtx code, gives number of operands for an rtx with that code.
43 Does NOT include rtx header data (code and links). */
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) sizeof FORMAT - 1 ,
47 const unsigned char rtx_length[NUM_RTX_CODE] = {
53 /* Indexed by rtx code, gives the name of that kind of rtx, as a C string. */
55 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) NAME ,
57 const char * const rtx_name[NUM_RTX_CODE] = {
58 #include "rtl.def" /* rtl expressions are documented here */
63 /* Indexed by rtx code, gives a sequence of operand-types for
64 rtx's of that code. The sequence is a C string in which
65 each character describes one operand. */
67 const char * const rtx_format[NUM_RTX_CODE] = {
69 can cause a warning message
70 "0" field is unused (or used in a phase-dependent manner)
74 "n" like "i", but prints entries from `note_insn_name'
75 "w" an integer of width HOST_BITS_PER_WIDE_INT
77 "s" a pointer to a string
79 "S" like "s", but optional:
80 the containing rtx may end before this operand
81 "T" like "s", but treated specially by the RTL reader;
82 only found in machine description patterns.
83 "e" a pointer to an rtl expression
85 "E" a pointer to a vector that points to a number of rtl expressions
86 prints a list of the rtl expressions
87 "V" like "E", but optional:
88 the containing rtx may end before this operand
89 "u" a pointer to another insn
90 prints the uid of the insn.
91 "b" is a pointer to a bitmap header.
92 "B" is a basic block pointer.
93 "t" is a tree pointer. */
95 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) FORMAT ,
96 #include "rtl.def" /* rtl expressions are defined here */
100 /* Indexed by rtx code, gives a character representing the "class" of
101 that rtx code. See rtl.def for documentation on the defined classes. */
103 const enum rtx_class rtx_class[NUM_RTX_CODE] = {
104 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) CLASS,
105 #include "rtl.def" /* rtl expressions are defined here */
109 /* Indexed by rtx code, gives the size of the rtx in bytes. */
111 const unsigned char rtx_code_size[NUM_RTX_CODE] = {
112 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) \
113 ((ENUM) == CONST_INT || (ENUM) == CONST_DOUBLE || (ENUM) == CONST_FIXED\
114 ? RTX_HDR_SIZE + (sizeof FORMAT - 1) * sizeof (HOST_WIDE_INT) \
115 : RTX_HDR_SIZE + (sizeof FORMAT - 1) * sizeof (rtunion)),
121 /* Names for kinds of NOTEs and REG_NOTEs. */
123 const char * const note_insn_name[NOTE_INSN_MAX] =
125 #define DEF_INSN_NOTE(NAME) #NAME,
126 #include "insn-notes.def"
130 const char * const reg_note_name[REG_NOTE_MAX] =
132 #define DEF_REG_NOTE(NAME) #NAME,
133 #include "reg-notes.def"
137 #ifdef GATHER_STATISTICS
138 static int rtx_alloc_counts[(int) LAST_AND_UNUSED_RTX_CODE];
139 static int rtx_alloc_sizes[(int) LAST_AND_UNUSED_RTX_CODE];
140 static int rtvec_alloc_counts;
141 static int rtvec_alloc_sizes;
145 /* Allocate an rtx vector of N elements.
146 Store the length, and initialize all elements to zero. */
153 rt = ggc_alloc_rtvec (n);
154 /* Clear out the vector. */
155 memset (&rt->elem[0], 0, n * sizeof (rtx));
157 PUT_NUM_ELEM (rt, n);
159 #ifdef GATHER_STATISTICS
160 rtvec_alloc_counts++;
161 rtvec_alloc_sizes += n * sizeof (rtx);
167 /* Return the number of bytes occupied by rtx value X. */
170 rtx_size (const_rtx x)
172 if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_HAS_BLOCK_INFO_P (x))
173 return RTX_HDR_SIZE + sizeof (struct block_symbol);
174 return RTX_CODE_SIZE (GET_CODE (x));
177 /* Allocate an rtx of code CODE. The CODE is stored in the rtx;
178 all the rest is initialized to zero. */
181 rtx_alloc_stat (RTX_CODE code MEM_STAT_DECL)
185 rt = (rtx) ggc_alloc_zone_pass_stat (RTX_CODE_SIZE (code), &rtl_zone);
187 /* We want to clear everything up to the FLD array. Normally, this
188 is one int, but we don't want to assume that and it isn't very
189 portable anyway; this is. */
191 memset (rt, 0, RTX_HDR_SIZE);
194 #ifdef GATHER_STATISTICS
195 rtx_alloc_counts[code]++;
196 rtx_alloc_sizes[code] += RTX_CODE_SIZE (code);
203 /* Return true if ORIG is a sharable CONST. */
206 shared_const_p (const_rtx orig)
208 gcc_assert (GET_CODE (orig) == CONST);
210 /* CONST can be shared if it contains a SYMBOL_REF. If it contains
211 a LABEL_REF, it isn't sharable. */
212 return (GET_CODE (XEXP (orig, 0)) == PLUS
213 && GET_CODE (XEXP (XEXP (orig, 0), 0)) == SYMBOL_REF
214 && GET_CODE (XEXP (XEXP (orig, 0), 1)) == CONST_INT);
218 /* Create a new copy of an rtx.
219 Recursively copies the operands of the rtx,
220 except for those few rtx codes that are sharable. */
228 const char *format_ptr;
230 code = GET_CODE (orig);
244 /* SCRATCH must be shared because they represent distinct values. */
247 if (REG_P (XEXP (orig, 0)) && REGNO (XEXP (orig, 0)) < FIRST_PSEUDO_REGISTER)
252 if (shared_const_p (orig))
256 /* A MEM with a constant address is not sharable. The problem is that
257 the constant address may need to be reloaded. If the mem is shared,
258 then reloading one copy of this mem will cause all copies to appear
259 to have been reloaded. */
265 /* Copy the various flags, fields, and other information. We assume
266 that all fields need copying, and then clear the fields that should
267 not be copied. That is the sensible default behavior, and forces
268 us to explicitly document why we are *not* copying a flag. */
269 copy = shallow_copy_rtx (orig);
271 /* We do not copy the USED flag, which is used as a mark bit during
272 walks over the RTL. */
273 RTX_FLAG (copy, used) = 0;
275 /* We do not copy FRAME_RELATED for INSNs. */
277 RTX_FLAG (copy, frame_related) = 0;
278 RTX_FLAG (copy, jump) = RTX_FLAG (orig, jump);
279 RTX_FLAG (copy, call) = RTX_FLAG (orig, call);
281 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
283 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
284 switch (*format_ptr++)
287 if (XEXP (orig, i) != NULL)
288 XEXP (copy, i) = copy_rtx (XEXP (orig, i));
293 if (XVEC (orig, i) != NULL)
295 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
296 for (j = 0; j < XVECLEN (copy, i); j++)
297 XVECEXP (copy, i, j) = copy_rtx (XVECEXP (orig, i, j));
310 /* These are left unchanged. */
319 /* Create a new copy of an rtx. Only copy just one level. */
322 shallow_copy_rtx_stat (const_rtx orig MEM_STAT_DECL)
324 const unsigned int size = rtx_size (orig);
325 rtx const copy = (rtx) ggc_alloc_zone_pass_stat (size, &rtl_zone);
326 return (rtx) memcpy (copy, orig, size);
329 /* Nonzero when we are generating CONCATs. */
330 int generating_concat_p;
332 /* Nonzero when we are expanding trees to RTL. */
333 int currently_expanding_to_rtl;
337 /* Same as rtx_equal_p, but call CB on each pair of rtx if CB is not NULL.
338 When the callback returns true, we continue with the new pair. */
341 rtx_equal_p_cb (const_rtx x, const_rtx y, rtx_equal_p_callback_function cb)
351 if (x == 0 || y == 0)
354 /* Invoke the callback first. */
356 && ((*cb) (&x, &y, &nx, &ny)))
357 return rtx_equal_p_cb (nx, ny, cb);
360 /* Rtx's of different codes cannot be equal. */
361 if (code != GET_CODE (y))
364 /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.
365 (REG:SI x) and (REG:HI x) are NOT equivalent. */
367 if (GET_MODE (x) != GET_MODE (y))
370 /* Some RTL can be compared nonrecursively. */
374 return (REGNO (x) == REGNO (y));
377 return XEXP (x, 0) == XEXP (y, 0);
380 return XSTR (x, 0) == XSTR (y, 0);
392 /* Compare the elements. If any pair of corresponding elements
393 fail to match, return 0 for the whole thing. */
395 fmt = GET_RTX_FORMAT (code);
396 for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
401 if (XWINT (x, i) != XWINT (y, i))
407 if (XINT (x, i) != XINT (y, i))
409 #ifndef GENERATOR_FILE
410 if (((code == ASM_OPERANDS && i == 5)
411 || (code == ASM_INPUT && i == 1))
412 && locator_eq (XINT (x, i), XINT (y, i)))
421 /* Two vectors must have the same length. */
422 if (XVECLEN (x, i) != XVECLEN (y, i))
425 /* And the corresponding elements must match. */
426 for (j = 0; j < XVECLEN (x, i); j++)
427 if (rtx_equal_p_cb (XVECEXP (x, i, j),
428 XVECEXP (y, i, j), cb) == 0)
433 if (rtx_equal_p_cb (XEXP (x, i), XEXP (y, i), cb) == 0)
439 if ((XSTR (x, i) || XSTR (y, i))
440 && (! XSTR (x, i) || ! XSTR (y, i)
441 || strcmp (XSTR (x, i), XSTR (y, i))))
446 /* These are just backpointers, so they don't matter. */
453 /* It is believed that rtx's at this level will never
454 contain anything but integers and other rtx's,
455 except for within LABEL_REFs and SYMBOL_REFs. */
463 /* Return 1 if X and Y are identical-looking rtx's.
464 This is the Lisp function EQUAL for rtx arguments. */
467 rtx_equal_p (const_rtx x, const_rtx y)
469 return rtx_equal_p_cb (x, y, NULL);
473 dump_rtx_statistics (void)
475 #ifdef GATHER_STATISTICS
477 int total_counts = 0;
479 fprintf (stderr, "\nRTX Kind Count Bytes\n");
480 fprintf (stderr, "---------------------------------------\n");
481 for (i = 0; i < LAST_AND_UNUSED_RTX_CODE; i++)
482 if (rtx_alloc_counts[i])
484 fprintf (stderr, "%-20s %7d %10d\n", GET_RTX_NAME (i),
485 rtx_alloc_counts[i], rtx_alloc_sizes[i]);
486 total_counts += rtx_alloc_counts[i];
487 total_sizes += rtx_alloc_sizes[i];
489 if (rtvec_alloc_counts)
491 fprintf (stderr, "%-20s %7d %10d\n", "rtvec",
492 rtvec_alloc_counts, rtvec_alloc_sizes);
493 total_counts += rtvec_alloc_counts;
494 total_sizes += rtvec_alloc_sizes;
496 fprintf (stderr, "---------------------------------------\n");
497 fprintf (stderr, "%-20s %7d %10d\n",
498 "Total", total_counts, total_sizes);
499 fprintf (stderr, "---------------------------------------\n");
503 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
505 rtl_check_failed_bounds (const_rtx r, int n, const char *file, int line,
509 ("RTL check: access of elt %d of '%s' with last elt %d in %s, at %s:%d",
510 n, GET_RTX_NAME (GET_CODE (r)), GET_RTX_LENGTH (GET_CODE (r)) - 1,
511 func, trim_filename (file), line);
515 rtl_check_failed_type1 (const_rtx r, int n, int c1, const char *file, int line,
519 ("RTL check: expected elt %d type '%c', have '%c' (rtx %s) in %s, at %s:%d",
520 n, c1, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)),
521 func, trim_filename (file), line);
525 rtl_check_failed_type2 (const_rtx r, int n, int c1, int c2, const char *file,
526 int line, const char *func)
529 ("RTL check: expected elt %d type '%c' or '%c', have '%c' (rtx %s) in %s, at %s:%d",
530 n, c1, c2, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)),
531 func, trim_filename (file), line);
535 rtl_check_failed_code1 (const_rtx r, enum rtx_code code, const char *file,
536 int line, const char *func)
538 internal_error ("RTL check: expected code '%s', have '%s' in %s, at %s:%d",
539 GET_RTX_NAME (code), GET_RTX_NAME (GET_CODE (r)), func,
540 trim_filename (file), line);
544 rtl_check_failed_code2 (const_rtx r, enum rtx_code code1, enum rtx_code code2,
545 const char *file, int line, const char *func)
548 ("RTL check: expected code '%s' or '%s', have '%s' in %s, at %s:%d",
549 GET_RTX_NAME (code1), GET_RTX_NAME (code2), GET_RTX_NAME (GET_CODE (r)),
550 func, trim_filename (file), line);
554 rtl_check_failed_code_mode (const_rtx r, enum rtx_code code, enum machine_mode mode,
555 bool not_mode, const char *file, int line,
558 internal_error ((not_mode
559 ? ("RTL check: expected code '%s' and not mode '%s', "
560 "have code '%s' and mode '%s' in %s, at %s:%d")
561 : ("RTL check: expected code '%s' and mode '%s', "
562 "have code '%s' and mode '%s' in %s, at %s:%d")),
563 GET_RTX_NAME (code), GET_MODE_NAME (mode),
564 GET_RTX_NAME (GET_CODE (r)), GET_MODE_NAME (GET_MODE (r)),
565 func, trim_filename (file), line);
568 /* Report that line LINE of FILE tried to access the block symbol fields
569 of a non-block symbol. FUNC is the function that contains the line. */
572 rtl_check_failed_block_symbol (const char *file, int line, const char *func)
575 ("RTL check: attempt to treat non-block symbol as a block symbol "
576 "in %s, at %s:%d", func, trim_filename (file), line);
579 /* XXX Maybe print the vector? */
581 rtvec_check_failed_bounds (const_rtvec r, int n, const char *file, int line,
585 ("RTL check: access of elt %d of vector with last elt %d in %s, at %s:%d",
586 n, GET_NUM_ELEM (r) - 1, func, trim_filename (file), line);
588 #endif /* ENABLE_RTL_CHECKING */
590 #if defined ENABLE_RTL_FLAG_CHECKING
592 rtl_check_failed_flag (const char *name, const_rtx r, const char *file,
593 int line, const char *func)
596 ("RTL flag check: %s used with unexpected rtx code '%s' in %s, at %s:%d",
597 name, GET_RTX_NAME (GET_CODE (r)), func, trim_filename (file), line);
599 #endif /* ENABLE_RTL_FLAG_CHECKING */