/* RTL utility routines.
Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005, 2006 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. */
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)),
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
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
- && GET_CODE (XEXP (XEXP (orig, 0), 1)) == CONST_INT);
+ && CONST_INT_P(XEXP (XEXP (orig, 0), 1)));
}
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:
{
const unsigned int size = rtx_size (orig);
rtx const copy = (rtx) ggc_alloc_zone_pass_stat (size, &rtl_zone);
- return memcpy (copy, orig, size);
+ 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 (const_rtx x, const_rtx y)
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;
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)