/* RTL utility routines.
Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* This file is compiled twice: once for the generator programs
once for the compiler. */
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
-#include "real.h"
#include "ggc.h"
#ifdef GENERATOR_FILE
# include "errors.h"
const unsigned char rtx_code_size[NUM_RTX_CODE] = {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) \
- ((ENUM) == CONST_INT || (ENUM) == CONST_DOUBLE \
+ ((ENUM) == CONST_INT || (ENUM) == CONST_DOUBLE || (ENUM) == CONST_FIXED\
? RTX_HDR_SIZE + (sizeof FORMAT - 1) * sizeof (HOST_WIDE_INT) \
: RTX_HDR_SIZE + (sizeof FORMAT - 1) * sizeof (rtunion)),
#undef DEF_RTL_EXPR
};
-/* Make sure all NOTE_INSN_* values are negative. */
-extern char NOTE_INSN_MAX_isnt_negative_adjust_NOTE_INSN_BIAS
-[NOTE_INSN_MAX < 0 ? 1 : -1];
-
/* Names for kinds of NOTEs and REG_NOTEs. */
-const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS] =
+const char * const note_insn_name[NOTE_INSN_MAX] =
{
- "",
#define DEF_INSN_NOTE(NAME) #NAME,
#include "insn-notes.def"
#undef DEF_INSN_NOTE
return rt;
}
+/* Create a bitwise copy of VEC. */
+
+rtvec
+shallow_copy_rtvec (rtvec vec)
+{
+ rtvec newvec;
+ int n;
+
+ n = GET_NUM_ELEM (vec);
+ newvec = rtvec_alloc (n);
+ memcpy (&newvec->elem[0], &vec->elem[0], sizeof (rtx) * n);
+ return newvec;
+}
+
/* Return the number of bytes occupied by rtx value X. */
unsigned int
-rtx_size (rtx x)
+rtx_size (const_rtx x)
{
if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_HAS_BLOCK_INFO_P (x))
return RTX_HDR_SIZE + sizeof (struct block_symbol);
}
\f
+/* Return true if ORIG is a sharable CONST. */
+
+bool
+shared_const_p (const_rtx orig)
+{
+ gcc_assert (GET_CODE (orig) == CONST);
+
+ /* CONST can be shared if it contains a SYMBOL_REF. If it contains
+ a LABEL_REF, it isn't sharable. */
+ return (GET_CODE (XEXP (orig, 0)) == PLUS
+ && GET_CODE (XEXP (XEXP (orig, 0), 0)) == SYMBOL_REF
+ && CONST_INT_P(XEXP (XEXP (orig, 0), 1)));
+}
+
+
/* Create a new copy of an rtx.
Recursively copies the operands of the rtx,
except for those few rtx codes that are sharable. */
switch (code)
{
case REG:
+ case DEBUG_EXPR:
+ case VALUE:
case CONST_INT:
case CONST_DOUBLE:
+ case CONST_FIXED:
case CONST_VECTOR:
case SYMBOL_REF:
case CODE_LABEL:
break;
case CONST:
- /* CONST can be shared if it contains a SYMBOL_REF. If it contains
- a LABEL_REF, it isn't sharable. */
- if (GET_CODE (XEXP (orig, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (orig, 0), 0)) == SYMBOL_REF
- && GET_CODE (XEXP (XEXP (orig, 0), 1)) == CONST_INT)
+ if (shared_const_p (orig))
return orig;
break;
/* Create a new copy of an rtx. Only copy just one level. */
rtx
-shallow_copy_rtx_stat (rtx orig MEM_STAT_DECL)
+shallow_copy_rtx_stat (const_rtx orig MEM_STAT_DECL)
{
- unsigned int size;
- rtx copy;
-
- size = rtx_size (orig);
- copy = (rtx) ggc_alloc_zone_pass_stat (size, &rtl_zone);
- memcpy (copy, orig, size);
- return copy;
+ const unsigned int size = rtx_size (orig);
+ rtx const copy = (rtx) ggc_alloc_zone_pass_stat (size, &rtl_zone);
+ return (rtx) memcpy (copy, orig, size);
}
\f
/* Nonzero when we are generating CONCATs. */
int currently_expanding_to_rtl;
\f
+
+/* Same as rtx_equal_p, but call CB on each pair of rtx if CB is not NULL.
+ When the callback returns true, we continue with the new pair.
+ Whenever changing this function check if rtx_equal_p below doesn't need
+ changing as well. */
+
+int
+rtx_equal_p_cb (const_rtx x, const_rtx y, rtx_equal_p_callback_function cb)
+{
+ int i;
+ int j;
+ enum rtx_code code;
+ const char *fmt;
+ rtx nx, ny;
+
+ if (x == y)
+ return 1;
+ if (x == 0 || y == 0)
+ return 0;
+
+ /* Invoke the callback first. */
+ if (cb != NULL
+ && ((*cb) (&x, &y, &nx, &ny)))
+ return rtx_equal_p_cb (nx, ny, cb);
+
+ code = GET_CODE (x);
+ /* Rtx's of different codes cannot be equal. */
+ if (code != GET_CODE (y))
+ return 0;
+
+ /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.
+ (REG:SI x) and (REG:HI x) are NOT equivalent. */
+
+ if (GET_MODE (x) != GET_MODE (y))
+ return 0;
+
+ /* MEMs refering to different address space are not equivalent. */
+ if (code == MEM && MEM_ADDR_SPACE (x) != MEM_ADDR_SPACE (y))
+ return 0;
+
+ /* Some RTL can be compared nonrecursively. */
+ switch (code)
+ {
+ case REG:
+ return (REGNO (x) == REGNO (y));
+
+ case LABEL_REF:
+ return XEXP (x, 0) == XEXP (y, 0);
+
+ case SYMBOL_REF:
+ return XSTR (x, 0) == XSTR (y, 0);
+
+ case DEBUG_EXPR:
+ case VALUE:
+ case SCRATCH:
+ case CONST_DOUBLE:
+ case CONST_INT:
+ case CONST_FIXED:
+ return 0;
+
+ default:
+ break;
+ }
+
+ /* Compare the elements. If any pair of corresponding elements
+ fail to match, return 0 for the whole thing. */
+
+ fmt = GET_RTX_FORMAT (code);
+ for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
+ {
+ switch (fmt[i])
+ {
+ case 'w':
+ if (XWINT (x, i) != XWINT (y, i))
+ return 0;
+ break;
+
+ case 'n':
+ case 'i':
+ if (XINT (x, i) != XINT (y, i))
+ return 0;
+ break;
+
+ case 'V':
+ case 'E':
+ /* Two vectors must have the same length. */
+ if (XVECLEN (x, i) != XVECLEN (y, i))
+ return 0;
+
+ /* And the corresponding elements must match. */
+ for (j = 0; j < XVECLEN (x, i); j++)
+ if (rtx_equal_p_cb (XVECEXP (x, i, j),
+ XVECEXP (y, i, j), cb) == 0)
+ return 0;
+ break;
+
+ case 'e':
+ if (rtx_equal_p_cb (XEXP (x, i), XEXP (y, i), cb) == 0)
+ return 0;
+ break;
+
+ case 'S':
+ case 's':
+ if ((XSTR (x, i) || XSTR (y, i))
+ && (! XSTR (x, i) || ! XSTR (y, i)
+ || strcmp (XSTR (x, i), XSTR (y, i))))
+ return 0;
+ break;
+
+ case 'u':
+ /* These are just backpointers, so they don't matter. */
+ break;
+
+ case '0':
+ case 't':
+ break;
+
+ /* It is believed that rtx's at this level will never
+ contain anything but integers and other rtx's,
+ except for within LABEL_REFs and SYMBOL_REFs. */
+ default:
+ gcc_unreachable ();
+ }
+ }
+ return 1;
+}
+
/* Return 1 if X and Y are identical-looking rtx's.
- This is the Lisp function EQUAL for rtx arguments. */
+ This is the Lisp function EQUAL for rtx arguments.
+ Whenever changing this function check if rtx_equal_p_cb above doesn't need
+ changing as well. */
int
-rtx_equal_p (rtx x, rtx y)
+rtx_equal_p (const_rtx x, const_rtx y)
{
int i;
int j;
if (GET_MODE (x) != GET_MODE (y))
return 0;
+ /* MEMs refering to different address space are not equivalent. */
+ if (code == MEM && MEM_ADDR_SPACE (x) != MEM_ADDR_SPACE (y))
+ return 0;
+
/* Some RTL can be compared nonrecursively. */
switch (code)
{
case SYMBOL_REF:
return XSTR (x, 0) == XSTR (y, 0);
+ case DEBUG_EXPR:
+ case VALUE:
case SCRATCH:
case CONST_DOUBLE:
case CONST_INT:
+ case CONST_FIXED:
return 0;
default:
/* And the corresponding elements must match. */
for (j = 0; j < XVECLEN (x, i); j++)
- if (rtx_equal_p (XVECEXP (x, i, j), XVECEXP (y, i, j)) == 0)
+ if (rtx_equal_p (XVECEXP (x, i, j), XVECEXP (y, i, j)) == 0)
return 0;
break;
return 1;
}
-void dump_rtx_statistics (void)
+void
+dump_rtx_statistics (void)
{
#ifdef GATHER_STATISTICS
int i;
fprintf (stderr, "%-20s %7d %10d\n",
"Total", total_counts, total_sizes);
fprintf (stderr, "---------------------------------------\n");
-#endif
+#endif
}
\f
#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
void
-rtl_check_failed_bounds (rtx r, int n, const char *file, int line,
+rtl_check_failed_bounds (const_rtx r, int n, const char *file, int line,
const char *func)
{
internal_error
}
void
-rtl_check_failed_type1 (rtx r, int n, int c1, const char *file, int line,
+rtl_check_failed_type1 (const_rtx r, int n, int c1, const char *file, int line,
const char *func)
{
internal_error
}
void
-rtl_check_failed_type2 (rtx r, int n, int c1, int c2, const char *file,
+rtl_check_failed_type2 (const_rtx r, int n, int c1, int c2, const char *file,
int line, const char *func)
{
internal_error
}
void
-rtl_check_failed_code1 (rtx r, enum rtx_code code, const char *file,
+rtl_check_failed_code1 (const_rtx r, enum rtx_code code, const char *file,
int line, const char *func)
{
internal_error ("RTL check: expected code '%s', have '%s' in %s, at %s:%d",
}
void
-rtl_check_failed_code2 (rtx r, enum rtx_code code1, enum rtx_code code2,
+rtl_check_failed_code2 (const_rtx r, enum rtx_code code1, enum rtx_code code2,
const char *file, int line, const char *func)
{
internal_error
}
void
-rtl_check_failed_code_mode (rtx r, enum rtx_code code, enum machine_mode mode,
+rtl_check_failed_code_mode (const_rtx r, enum rtx_code code, enum machine_mode mode,
bool not_mode, const char *file, int line,
const char *func)
{
/* XXX Maybe print the vector? */
void
-rtvec_check_failed_bounds (rtvec r, int n, const char *file, int line,
+rtvec_check_failed_bounds (const_rtvec r, int n, const char *file, int line,
const char *func)
{
internal_error
#if defined ENABLE_RTL_FLAG_CHECKING
void
-rtl_check_failed_flag (const char *name, rtx r, const char *file,
+rtl_check_failed_flag (const char *name, const_rtx r, const char *file,
int line, const char *func)
{
internal_error
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