1 /* RTL utility routines.
2 Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 && CONST_INT_P(XEXP (XEXP (orig, 0), 1)));
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);
246 /* SCRATCH must be shared because they represent distinct values. */
249 if (REG_P (XEXP (orig, 0)) && REGNO (XEXP (orig, 0)) < FIRST_PSEUDO_REGISTER)
254 if (shared_const_p (orig))
258 /* A MEM with a constant address is not sharable. The problem is that
259 the constant address may need to be reloaded. If the mem is shared,
260 then reloading one copy of this mem will cause all copies to appear
261 to have been reloaded. */
267 /* Copy the various flags, fields, and other information. We assume
268 that all fields need copying, and then clear the fields that should
269 not be copied. That is the sensible default behavior, and forces
270 us to explicitly document why we are *not* copying a flag. */
271 copy = shallow_copy_rtx (orig);
273 /* We do not copy the USED flag, which is used as a mark bit during
274 walks over the RTL. */
275 RTX_FLAG (copy, used) = 0;
277 /* We do not copy FRAME_RELATED for INSNs. */
279 RTX_FLAG (copy, frame_related) = 0;
280 RTX_FLAG (copy, jump) = RTX_FLAG (orig, jump);
281 RTX_FLAG (copy, call) = RTX_FLAG (orig, call);
283 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
285 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
286 switch (*format_ptr++)
289 if (XEXP (orig, i) != NULL)
290 XEXP (copy, i) = copy_rtx (XEXP (orig, i));
295 if (XVEC (orig, i) != NULL)
297 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
298 for (j = 0; j < XVECLEN (copy, i); j++)
299 XVECEXP (copy, i, j) = copy_rtx (XVECEXP (orig, i, j));
312 /* These are left unchanged. */
321 /* Create a new copy of an rtx. Only copy just one level. */
324 shallow_copy_rtx_stat (const_rtx orig MEM_STAT_DECL)
326 const unsigned int size = rtx_size (orig);
327 rtx const copy = (rtx) ggc_alloc_zone_pass_stat (size, &rtl_zone);
328 return (rtx) memcpy (copy, orig, size);
331 /* Nonzero when we are generating CONCATs. */
332 int generating_concat_p;
334 /* Nonzero when we are expanding trees to RTL. */
335 int currently_expanding_to_rtl;
339 /* Same as rtx_equal_p, but call CB on each pair of rtx if CB is not NULL.
340 When the callback returns true, we continue with the new pair.
341 Whenever changing this function check if rtx_equal_p below doesn't need
345 rtx_equal_p_cb (const_rtx x, const_rtx y, rtx_equal_p_callback_function cb)
355 if (x == 0 || y == 0)
358 /* Invoke the callback first. */
360 && ((*cb) (&x, &y, &nx, &ny)))
361 return rtx_equal_p_cb (nx, ny, cb);
364 /* Rtx's of different codes cannot be equal. */
365 if (code != GET_CODE (y))
368 /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.
369 (REG:SI x) and (REG:HI x) are NOT equivalent. */
371 if (GET_MODE (x) != GET_MODE (y))
374 /* Some RTL can be compared nonrecursively. */
378 return (REGNO (x) == REGNO (y));
381 return XEXP (x, 0) == XEXP (y, 0);
384 return XSTR (x, 0) == XSTR (y, 0);
398 /* Compare the elements. If any pair of corresponding elements
399 fail to match, return 0 for the whole thing. */
401 fmt = GET_RTX_FORMAT (code);
402 for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
407 if (XWINT (x, i) != XWINT (y, i))
413 if (XINT (x, i) != XINT (y, i))
419 /* Two vectors must have the same length. */
420 if (XVECLEN (x, i) != XVECLEN (y, i))
423 /* And the corresponding elements must match. */
424 for (j = 0; j < XVECLEN (x, i); j++)
425 if (rtx_equal_p_cb (XVECEXP (x, i, j),
426 XVECEXP (y, i, j), cb) == 0)
431 if (rtx_equal_p_cb (XEXP (x, i), XEXP (y, i), cb) == 0)
437 if ((XSTR (x, i) || XSTR (y, i))
438 && (! XSTR (x, i) || ! XSTR (y, i)
439 || strcmp (XSTR (x, i), XSTR (y, i))))
444 /* These are just backpointers, so they don't matter. */
451 /* It is believed that rtx's at this level will never
452 contain anything but integers and other rtx's,
453 except for within LABEL_REFs and SYMBOL_REFs. */
461 /* Return 1 if X and Y are identical-looking rtx's.
462 This is the Lisp function EQUAL for rtx arguments.
463 Whenever changing this function check if rtx_equal_p_cb above doesn't need
467 rtx_equal_p (const_rtx x, const_rtx y)
476 if (x == 0 || y == 0)
480 /* Rtx's of different codes cannot be equal. */
481 if (code != GET_CODE (y))
484 /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.
485 (REG:SI x) and (REG:HI x) are NOT equivalent. */
487 if (GET_MODE (x) != GET_MODE (y))
490 /* Some RTL can be compared nonrecursively. */
494 return (REGNO (x) == REGNO (y));
497 return XEXP (x, 0) == XEXP (y, 0);
500 return XSTR (x, 0) == XSTR (y, 0);
514 /* Compare the elements. If any pair of corresponding elements
515 fail to match, return 0 for the whole thing. */
517 fmt = GET_RTX_FORMAT (code);
518 for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
523 if (XWINT (x, i) != XWINT (y, i))
529 if (XINT (x, i) != XINT (y, i))
535 /* Two vectors must have the same length. */
536 if (XVECLEN (x, i) != XVECLEN (y, i))
539 /* And the corresponding elements must match. */
540 for (j = 0; j < XVECLEN (x, i); j++)
541 if (rtx_equal_p (XVECEXP (x, i, j), XVECEXP (y, i, j)) == 0)
546 if (rtx_equal_p (XEXP (x, i), XEXP (y, i)) == 0)
552 if ((XSTR (x, i) || XSTR (y, i))
553 && (! XSTR (x, i) || ! XSTR (y, i)
554 || strcmp (XSTR (x, i), XSTR (y, i))))
559 /* These are just backpointers, so they don't matter. */
566 /* It is believed that rtx's at this level will never
567 contain anything but integers and other rtx's,
568 except for within LABEL_REFs and SYMBOL_REFs. */
577 dump_rtx_statistics (void)
579 #ifdef GATHER_STATISTICS
581 int total_counts = 0;
583 fprintf (stderr, "\nRTX Kind Count Bytes\n");
584 fprintf (stderr, "---------------------------------------\n");
585 for (i = 0; i < LAST_AND_UNUSED_RTX_CODE; i++)
586 if (rtx_alloc_counts[i])
588 fprintf (stderr, "%-20s %7d %10d\n", GET_RTX_NAME (i),
589 rtx_alloc_counts[i], rtx_alloc_sizes[i]);
590 total_counts += rtx_alloc_counts[i];
591 total_sizes += rtx_alloc_sizes[i];
593 if (rtvec_alloc_counts)
595 fprintf (stderr, "%-20s %7d %10d\n", "rtvec",
596 rtvec_alloc_counts, rtvec_alloc_sizes);
597 total_counts += rtvec_alloc_counts;
598 total_sizes += rtvec_alloc_sizes;
600 fprintf (stderr, "---------------------------------------\n");
601 fprintf (stderr, "%-20s %7d %10d\n",
602 "Total", total_counts, total_sizes);
603 fprintf (stderr, "---------------------------------------\n");
607 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
609 rtl_check_failed_bounds (const_rtx r, int n, const char *file, int line,
613 ("RTL check: access of elt %d of '%s' with last elt %d in %s, at %s:%d",
614 n, GET_RTX_NAME (GET_CODE (r)), GET_RTX_LENGTH (GET_CODE (r)) - 1,
615 func, trim_filename (file), line);
619 rtl_check_failed_type1 (const_rtx r, int n, int c1, const char *file, int line,
623 ("RTL check: expected elt %d type '%c', have '%c' (rtx %s) in %s, at %s:%d",
624 n, c1, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)),
625 func, trim_filename (file), line);
629 rtl_check_failed_type2 (const_rtx r, int n, int c1, int c2, const char *file,
630 int line, const char *func)
633 ("RTL check: expected elt %d type '%c' or '%c', have '%c' (rtx %s) in %s, at %s:%d",
634 n, c1, c2, GET_RTX_FORMAT (GET_CODE (r))[n], GET_RTX_NAME (GET_CODE (r)),
635 func, trim_filename (file), line);
639 rtl_check_failed_code1 (const_rtx r, enum rtx_code code, const char *file,
640 int line, const char *func)
642 internal_error ("RTL check: expected code '%s', have '%s' in %s, at %s:%d",
643 GET_RTX_NAME (code), GET_RTX_NAME (GET_CODE (r)), func,
644 trim_filename (file), line);
648 rtl_check_failed_code2 (const_rtx r, enum rtx_code code1, enum rtx_code code2,
649 const char *file, int line, const char *func)
652 ("RTL check: expected code '%s' or '%s', have '%s' in %s, at %s:%d",
653 GET_RTX_NAME (code1), GET_RTX_NAME (code2), GET_RTX_NAME (GET_CODE (r)),
654 func, trim_filename (file), line);
658 rtl_check_failed_code_mode (const_rtx r, enum rtx_code code, enum machine_mode mode,
659 bool not_mode, const char *file, int line,
662 internal_error ((not_mode
663 ? ("RTL check: expected code '%s' and not mode '%s', "
664 "have code '%s' and mode '%s' in %s, at %s:%d")
665 : ("RTL check: expected code '%s' and mode '%s', "
666 "have code '%s' and mode '%s' in %s, at %s:%d")),
667 GET_RTX_NAME (code), GET_MODE_NAME (mode),
668 GET_RTX_NAME (GET_CODE (r)), GET_MODE_NAME (GET_MODE (r)),
669 func, trim_filename (file), line);
672 /* Report that line LINE of FILE tried to access the block symbol fields
673 of a non-block symbol. FUNC is the function that contains the line. */
676 rtl_check_failed_block_symbol (const char *file, int line, const char *func)
679 ("RTL check: attempt to treat non-block symbol as a block symbol "
680 "in %s, at %s:%d", func, trim_filename (file), line);
683 /* XXX Maybe print the vector? */
685 rtvec_check_failed_bounds (const_rtvec r, int n, const char *file, int line,
689 ("RTL check: access of elt %d of vector with last elt %d in %s, at %s:%d",
690 n, GET_NUM_ELEM (r) - 1, func, trim_filename (file), line);
692 #endif /* ENABLE_RTL_CHECKING */
694 #if defined ENABLE_RTL_FLAG_CHECKING
696 rtl_check_failed_flag (const char *name, const_rtx r, const char *file,
697 int line, const char *func)
700 ("RTL flag check: %s used with unexpected rtx code '%s' in %s, at %s:%d",
701 name, GET_RTX_NAME (GET_CODE (r)), func, trim_filename (file), line);
703 #endif /* ENABLE_RTL_FLAG_CHECKING */