#include "config.h"
#include "system.h"
#include "rtl.h"
#include "tree.h"
#include "tm_p.h"
#include "regs.h"
#include "hard-reg-set.h"
#include "flags.h"
#include "real.h"
#include "insn-config.h"
#include "recog.h"
#include "function.h"
#include "expr.h"
#include "toplev.h"
#include "output.h"
#include "ggc.h"
#define NONZERO_BASE_PLUS_P(X) \
((X) == frame_pointer_rtx || (X) == hard_frame_pointer_rtx \
|| (X) == virtual_stack_vars_rtx \
|| (X) == virtual_incoming_args_rtx \
|| (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == CONST_INT \
&& (XEXP (X, 0) == frame_pointer_rtx \
|| XEXP (X, 0) == hard_frame_pointer_rtx \
|| ((X) == arg_pointer_rtx \
&& fixed_regs[ARG_POINTER_REGNUM]) \
|| XEXP (X, 0) == virtual_stack_vars_rtx \
|| XEXP (X, 0) == virtual_incoming_args_rtx)) \
|| (X) == stack_pointer_rtx \
|| (X) == virtual_stack_dynamic_rtx \
|| (X) == virtual_outgoing_args_rtx \
|| (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == CONST_INT \
&& (XEXP (X, 0) == stack_pointer_rtx \
|| XEXP (X, 0) == virtual_stack_dynamic_rtx \
|| XEXP (X, 0) == virtual_outgoing_args_rtx)) \
|| GET_CODE (X) == ADDRESSOF)
#define HWI_SIGN_EXTEND(low) \
((((HOST_WIDE_INT) low) < 0) ? ((HOST_WIDE_INT) -1) : ((HOST_WIDE_INT) 0))
static rtx neg_const_int PARAMS ((enum machine_mode, rtx));
static int simplify_plus_minus_op_data_cmp PARAMS ((const void *,
const void *));
static rtx simplify_plus_minus PARAMS ((enum rtx_code,
enum machine_mode, rtx,
rtx, int));
static rtx
neg_const_int (mode, i)
enum machine_mode mode;
rtx i;
{
return gen_int_mode (- INTVAL (i), mode);
}
rtx
simplify_gen_binary (code, mode, op0, op1)
enum rtx_code code;
enum machine_mode mode;
rtx op0, op1;
{
rtx tem;
if (GET_RTX_CLASS (code) == 'c'
&& swap_commutative_operands_p (op0, op1))
tem = op0, op0 = op1, op1 = tem;
tem = simplify_binary_operation (code, mode, op0, op1);
if (tem)
return tem;
if (code == PLUS || code == MINUS)
{
tem = simplify_plus_minus (code, mode, op0, op1, 1);
if (tem)
return tem;
}
return gen_rtx_fmt_ee (code, mode, op0, op1);
}
rtx
avoid_constant_pool_reference (x)
rtx x;
{
rtx c, addr;
enum machine_mode cmode;
if (GET_CODE (x) != MEM)
return x;
addr = XEXP (x, 0);
if (GET_CODE (addr) == LO_SUM)
addr = XEXP (addr, 1);
if (GET_CODE (addr) != SYMBOL_REF
|| ! CONSTANT_POOL_ADDRESS_P (addr))
return x;
c = get_pool_constant (addr);
cmode = get_pool_mode (addr);
if (cmode != GET_MODE (x))
{
c = simplify_subreg (GET_MODE (x), c, cmode, 0);
return c ? c : x;
}
return c;
}
rtx
simplify_gen_unary (code, mode, op, op_mode)
enum rtx_code code;
enum machine_mode mode;
rtx op;
enum machine_mode op_mode;
{
rtx tem;
if ((tem = simplify_unary_operation (code, mode, op, op_mode)) != 0)
return tem;
return gen_rtx_fmt_e (code, mode, op);
}
rtx
simplify_gen_ternary (code, mode, op0_mode, op0, op1, op2)
enum rtx_code code;
enum machine_mode mode, op0_mode;
rtx op0, op1, op2;
{
rtx tem;
if (0 != (tem = simplify_ternary_operation (code, mode, op0_mode,
op0, op1, op2)))
return tem;
return gen_rtx_fmt_eee (code, mode, op0, op1, op2);
}
rtx
simplify_gen_relational (code, mode, cmp_mode, op0, op1)
enum rtx_code code;
enum machine_mode mode;
enum machine_mode cmp_mode;
rtx op0, op1;
{
rtx tem;
if ((tem = simplify_relational_operation (code, cmp_mode, op0, op1)) != 0)
return tem;
if (op0 == const0_rtx && swap_commutative_operands_p (op0, op1))
tem = op0, op0 = op1, op1 = tem, code = swap_condition (code);
if (GET_CODE (op0) == COMPARE && op1 == const0_rtx)
op1 = XEXP (op0, 1), op0 = XEXP (op0, 0);
if (code == NE && op1 == const0_rtx
&& GET_RTX_CLASS (GET_CODE (op0)) == '<')
return op0;
else if (code == EQ && op1 == const0_rtx)
{
enum rtx_code new = reversed_comparison_code (op0, NULL_RTX);
if (new != UNKNOWN)
{
code = new;
mode = cmp_mode;
op1 = XEXP (op0, 1);
op0 = XEXP (op0, 0);
}
}
if (swap_commutative_operands_p (op0, op1))
tem = op0, op0 = op1, op1 = tem, code = swap_condition (code);
return gen_rtx_fmt_ee (code, mode, op0, op1);
}
rtx
simplify_replace_rtx (x, old, new)
rtx x;
rtx old;
rtx new;
{
enum rtx_code code = GET_CODE (x);
enum machine_mode mode = GET_MODE (x);
if (x == old)
return new;
switch (GET_RTX_CLASS (code))
{
case '1':
{
enum machine_mode op_mode = GET_MODE (XEXP (x, 0));
rtx op = (XEXP (x, 0) == old
? new : simplify_replace_rtx (XEXP (x, 0), old, new));
return simplify_gen_unary (code, mode, op, op_mode);
}
case '2':
case 'c':
return
simplify_gen_binary (code, mode,
simplify_replace_rtx (XEXP (x, 0), old, new),
simplify_replace_rtx (XEXP (x, 1), old, new));
case '<':
{
enum machine_mode op_mode = (GET_MODE (XEXP (x, 0)) != VOIDmode
? GET_MODE (XEXP (x, 0))
: GET_MODE (XEXP (x, 1)));
rtx op0 = simplify_replace_rtx (XEXP (x, 0), old, new);
rtx op1 = simplify_replace_rtx (XEXP (x, 1), old, new);
return
simplify_gen_relational (code, mode,
(op_mode != VOIDmode
? op_mode
: GET_MODE (op0) != VOIDmode
? GET_MODE (op0)
: GET_MODE (op1)),
op0, op1);
}
case '3':
case 'b':
{
enum machine_mode op_mode = GET_MODE (XEXP (x, 0));
rtx op0 = simplify_replace_rtx (XEXP (x, 0), old, new);
return
simplify_gen_ternary (code, mode,
(op_mode != VOIDmode
? op_mode
: GET_MODE (op0)),
op0,
simplify_replace_rtx (XEXP (x, 1), old, new),
simplify_replace_rtx (XEXP (x, 2), old, new));
}
case 'x':
if (code == SUBREG)
{
rtx exp;
exp = simplify_gen_subreg (GET_MODE (x),
simplify_replace_rtx (SUBREG_REG (x),
old, new),
GET_MODE (SUBREG_REG (x)),
SUBREG_BYTE (x));
if (exp)
x = exp;
}
return x;
case 'o':
if (code == MEM)
return replace_equiv_address_nv (x,
simplify_replace_rtx (XEXP (x, 0),
old, new));
else if (code == LO_SUM)
{
rtx op0 = simplify_replace_rtx (XEXP (x, 0), old, new);
rtx op1 = simplify_replace_rtx (XEXP (x, 1), old, new);
if (GET_CODE (op0) == HIGH && rtx_equal_p (XEXP (op0, 0), op1))
return op1;
return gen_rtx_LO_SUM (mode, op0, op1);
}
else if (code == REG)
{
if (REG_P (old) && REGNO (x) == REGNO (old))
return new;
}
return x;
default:
return x;
}
return x;
}
rtx
simplify_unary_operation (code, mode, op, op_mode)
enum rtx_code code;
enum machine_mode mode;
rtx op;
enum machine_mode op_mode;
{
unsigned int width = GET_MODE_BITSIZE (mode);
rtx trueop = avoid_constant_pool_reference (op);
if (code == VEC_DUPLICATE)
{
if (!VECTOR_MODE_P (mode))
abort ();
if (GET_MODE (trueop) != VOIDmode
&& !VECTOR_MODE_P (GET_MODE (trueop))
&& GET_MODE_INNER (mode) != GET_MODE (trueop))
abort ();
if (GET_MODE (trueop) != VOIDmode
&& VECTOR_MODE_P (GET_MODE (trueop))
&& GET_MODE_INNER (mode) != GET_MODE_INNER (GET_MODE (trueop)))
abort ();
if (GET_CODE (trueop) == CONST_INT || GET_CODE (trueop) == CONST_DOUBLE
|| GET_CODE (trueop) == CONST_VECTOR)
{
int elt_size = GET_MODE_SIZE (GET_MODE_INNER (mode));
unsigned n_elts = (GET_MODE_SIZE (mode) / elt_size);
rtvec v = rtvec_alloc (n_elts);
unsigned int i;
if (GET_CODE (trueop) != CONST_VECTOR)
for (i = 0; i < n_elts; i++)
RTVEC_ELT (v, i) = trueop;
else
{
enum machine_mode inmode = GET_MODE (trueop);
int in_elt_size = GET_MODE_SIZE (GET_MODE_INNER (inmode));
unsigned in_n_elts = (GET_MODE_SIZE (inmode) / in_elt_size);
if (in_n_elts >= n_elts || n_elts % in_n_elts)
abort ();
for (i = 0; i < n_elts; i++)
RTVEC_ELT (v, i) = CONST_VECTOR_ELT (trueop, i % in_n_elts);
}
return gen_rtx_CONST_VECTOR (mode, v);
}
}
if (code == FLOAT && GET_MODE (trueop) == VOIDmode
&& (GET_CODE (trueop) == CONST_DOUBLE || GET_CODE (trueop) == CONST_INT))
{
HOST_WIDE_INT hv, lv;
REAL_VALUE_TYPE d;
if (GET_CODE (trueop) == CONST_INT)
lv = INTVAL (trueop), hv = HWI_SIGN_EXTEND (lv);
else
lv = CONST_DOUBLE_LOW (trueop), hv = CONST_DOUBLE_HIGH (trueop);
REAL_VALUE_FROM_INT (d, lv, hv, mode);
d = real_value_truncate (mode, d);
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
else if (code == UNSIGNED_FLOAT && GET_MODE (trueop) == VOIDmode
&& (GET_CODE (trueop) == CONST_DOUBLE
|| GET_CODE (trueop) == CONST_INT))
{
HOST_WIDE_INT hv, lv;
REAL_VALUE_TYPE d;
if (GET_CODE (trueop) == CONST_INT)
lv = INTVAL (trueop), hv = HWI_SIGN_EXTEND (lv);
else
lv = CONST_DOUBLE_LOW (trueop), hv = CONST_DOUBLE_HIGH (trueop);
if (op_mode == VOIDmode)
{
if (hv < 0)
return 0;
}
else if (GET_MODE_BITSIZE (op_mode) >= HOST_BITS_PER_WIDE_INT * 2)
;
else
hv = 0, lv &= GET_MODE_MASK (op_mode);
REAL_VALUE_FROM_UNSIGNED_INT (d, lv, hv, mode);
d = real_value_truncate (mode, d);
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
if (GET_CODE (trueop) == CONST_INT
&& width <= HOST_BITS_PER_WIDE_INT && width > 0)
{
HOST_WIDE_INT arg0 = INTVAL (trueop);
HOST_WIDE_INT val;
switch (code)
{
case NOT:
val = ~ arg0;
break;
case NEG:
val = - arg0;
break;
case ABS:
val = (arg0 >= 0 ? arg0 : - arg0);
break;
case FFS:
arg0 &= GET_MODE_MASK (mode);
val = exact_log2 (arg0 & (- arg0)) + 1;
break;
case TRUNCATE:
val = arg0;
break;
case ZERO_EXTEND:
if (op_mode == VOIDmode)
abort ();
if (GET_MODE_BITSIZE (op_mode) == HOST_BITS_PER_WIDE_INT)
{
if (width != GET_MODE_BITSIZE (op_mode))
abort ();
val = arg0;
}
else if (GET_MODE_BITSIZE (op_mode) < HOST_BITS_PER_WIDE_INT)
val = arg0 & ~((HOST_WIDE_INT) (-1) << GET_MODE_BITSIZE (op_mode));
else
return 0;
break;
case SIGN_EXTEND:
if (op_mode == VOIDmode)
op_mode = mode;
if (GET_MODE_BITSIZE (op_mode) == HOST_BITS_PER_WIDE_INT)
{
if (width != GET_MODE_BITSIZE (op_mode))
abort ();
val = arg0;
}
else if (GET_MODE_BITSIZE (op_mode) < HOST_BITS_PER_WIDE_INT)
{
val
= arg0 & ~((HOST_WIDE_INT) (-1) << GET_MODE_BITSIZE (op_mode));
if (val
& ((HOST_WIDE_INT) 1 << (GET_MODE_BITSIZE (op_mode) - 1)))
val -= (HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (op_mode);
}
else
return 0;
break;
case SQRT:
case FLOAT_EXTEND:
case FLOAT_TRUNCATE:
case SS_TRUNCATE:
case US_TRUNCATE:
return 0;
default:
abort ();
}
val = trunc_int_for_mode (val, mode);
return GEN_INT (val);
}
else if (GET_MODE (trueop) == VOIDmode
&& width <= HOST_BITS_PER_WIDE_INT * 2
&& (GET_CODE (trueop) == CONST_DOUBLE
|| GET_CODE (trueop) == CONST_INT))
{
unsigned HOST_WIDE_INT l1, lv;
HOST_WIDE_INT h1, hv;
if (GET_CODE (trueop) == CONST_DOUBLE)
l1 = CONST_DOUBLE_LOW (trueop), h1 = CONST_DOUBLE_HIGH (trueop);
else
l1 = INTVAL (trueop), h1 = HWI_SIGN_EXTEND (l1);
switch (code)
{
case NOT:
lv = ~ l1;
hv = ~ h1;
break;
case NEG:
neg_double (l1, h1, &lv, &hv);
break;
case ABS:
if (h1 < 0)
neg_double (l1, h1, &lv, &hv);
else
lv = l1, hv = h1;
break;
case FFS:
hv = 0;
if (l1 == 0)
lv = HOST_BITS_PER_WIDE_INT + exact_log2 (h1 & (-h1)) + 1;
else
lv = exact_log2 (l1 & (-l1)) + 1;
break;
case TRUNCATE:
lv = l1, hv = h1;
break;
case ZERO_EXTEND:
if (op_mode == VOIDmode)
abort ();
if (GET_MODE_BITSIZE (op_mode) > HOST_BITS_PER_WIDE_INT)
return 0;
hv = 0;
lv = l1 & GET_MODE_MASK (op_mode);
break;
case SIGN_EXTEND:
if (op_mode == VOIDmode
|| GET_MODE_BITSIZE (op_mode) > HOST_BITS_PER_WIDE_INT)
return 0;
else
{
lv = l1 & GET_MODE_MASK (op_mode);
if (GET_MODE_BITSIZE (op_mode) < HOST_BITS_PER_WIDE_INT
&& (lv & ((HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (op_mode) - 1))) != 0)
lv -= (HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (op_mode);
hv = HWI_SIGN_EXTEND (lv);
}
break;
case SQRT:
return 0;
default:
return 0;
}
return immed_double_const (lv, hv, mode);
}
else if (GET_CODE (trueop) == CONST_DOUBLE
&& GET_MODE_CLASS (mode) == MODE_FLOAT)
{
REAL_VALUE_TYPE d;
REAL_VALUE_FROM_CONST_DOUBLE (d, trueop);
switch (code)
{
case SQRT:
return 0;
case ABS:
d = REAL_VALUE_ABS (d);
break;
case NEG:
d = REAL_VALUE_NEGATE (d);
break;
case FLOAT_TRUNCATE:
d = real_value_truncate (mode, d);
break;
case FLOAT_EXTEND:
break;
case FIX:
real_arithmetic (&d, FIX_TRUNC_EXPR, &d, NULL);
break;
default:
abort ();
}
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
else if (GET_CODE (trueop) == CONST_DOUBLE
&& GET_MODE_CLASS (GET_MODE (trueop)) == MODE_FLOAT
&& GET_MODE_CLASS (mode) == MODE_INT
&& width <= HOST_BITS_PER_WIDE_INT && width > 0)
{
HOST_WIDE_INT i;
REAL_VALUE_TYPE d;
REAL_VALUE_FROM_CONST_DOUBLE (d, trueop);
switch (code)
{
case FIX: i = REAL_VALUE_FIX (d); break;
case UNSIGNED_FIX: i = REAL_VALUE_UNSIGNED_FIX (d); break;
default:
abort ();
}
return gen_int_mode (i, mode);
}
else
{
enum rtx_code reversed;
switch (code)
{
case NOT:
if (GET_CODE (op) == NOT)
return XEXP (op, 0);
if (mode == BImode && GET_RTX_CLASS (GET_CODE (op)) == '<'
&& ((reversed = reversed_comparison_code (op, NULL_RTX))
!= UNKNOWN))
return gen_rtx_fmt_ee (reversed,
op_mode, XEXP (op, 0), XEXP (op, 1));
break;
case NEG:
if (GET_CODE (op) == NEG)
return XEXP (op, 0);
break;
case SIGN_EXTEND:
if (GET_CODE (op) == TRUNCATE
&& GET_MODE (XEXP (op, 0)) == mode
&& GET_CODE (XEXP (op, 0)) == MINUS
&& GET_CODE (XEXP (XEXP (op, 0), 0)) == LABEL_REF
&& GET_CODE (XEXP (XEXP (op, 0), 1)) == LABEL_REF)
return XEXP (op, 0);
#if defined(POINTERS_EXTEND_UNSIGNED) && !defined(HAVE_ptr_extend)
if (! POINTERS_EXTEND_UNSIGNED
&& mode == Pmode && GET_MODE (op) == ptr_mode
&& (CONSTANT_P (op)
|| (GET_CODE (op) == SUBREG
&& GET_CODE (SUBREG_REG (op)) == REG
&& REG_POINTER (SUBREG_REG (op))
&& GET_MODE (SUBREG_REG (op)) == Pmode)))
return convert_memory_address (Pmode, op);
#endif
break;
#if defined(POINTERS_EXTEND_UNSIGNED) && !defined(HAVE_ptr_extend)
case ZERO_EXTEND:
if (POINTERS_EXTEND_UNSIGNED > 0
&& mode == Pmode && GET_MODE (op) == ptr_mode
&& (CONSTANT_P (op)
|| (GET_CODE (op) == SUBREG
&& GET_CODE (SUBREG_REG (op)) == REG
&& REG_POINTER (SUBREG_REG (op))
&& GET_MODE (SUBREG_REG (op)) == Pmode)))
return convert_memory_address (Pmode, op);
break;
#endif
default:
break;
}
return 0;
}
}
rtx
simplify_binary_operation (code, mode, op0, op1)
enum rtx_code code;
enum machine_mode mode;
rtx op0, op1;
{
HOST_WIDE_INT arg0, arg1, arg0s, arg1s;
HOST_WIDE_INT val;
unsigned int width = GET_MODE_BITSIZE (mode);
rtx tem;
rtx trueop0 = avoid_constant_pool_reference (op0);
rtx trueop1 = avoid_constant_pool_reference (op1);
if (flag_ss_const_prop)
{
trueop0 = ss_constant_propagation (trueop0);
trueop1 = ss_constant_propagation (trueop1);
}
if (GET_RTX_CLASS (code) == '<')
abort ();
if (GET_RTX_CLASS (code) == 'c'
&& swap_commutative_operands_p (trueop0, trueop1))
{
tem = op0, op0 = op1, op1 = tem;
tem = trueop0, trueop0 = trueop1, trueop1 = tem;
}
if (GET_MODE_CLASS (mode) == MODE_FLOAT
&& GET_CODE (trueop0) == CONST_DOUBLE
&& GET_CODE (trueop1) == CONST_DOUBLE
&& mode == GET_MODE (op0) && mode == GET_MODE (op1))
{
REAL_VALUE_TYPE f0, f1, value;
REAL_VALUE_FROM_CONST_DOUBLE (f0, trueop0);
REAL_VALUE_FROM_CONST_DOUBLE (f1, trueop1);
f0 = real_value_truncate (mode, f0);
f1 = real_value_truncate (mode, f1);
if (code == DIV
&& !MODE_HAS_INFINITIES (mode)
&& REAL_VALUES_EQUAL (f1, dconst0))
return 0;
REAL_ARITHMETIC (value, rtx_to_tree_code (code), f0, f1);
value = real_value_truncate (mode, value);
return CONST_DOUBLE_FROM_REAL_VALUE (value, mode);
}
if (GET_MODE_CLASS (mode) == MODE_INT
&& width == HOST_BITS_PER_WIDE_INT * 2
&& (GET_CODE (trueop0) == CONST_DOUBLE
|| GET_CODE (trueop0) == CONST_INT)
&& (GET_CODE (trueop1) == CONST_DOUBLE
|| GET_CODE (trueop1) == CONST_INT))
{
unsigned HOST_WIDE_INT l1, l2, lv;
HOST_WIDE_INT h1, h2, hv;
if (GET_CODE (trueop0) == CONST_DOUBLE)
l1 = CONST_DOUBLE_LOW (trueop0), h1 = CONST_DOUBLE_HIGH (trueop0);
else
l1 = INTVAL (trueop0), h1 = HWI_SIGN_EXTEND (l1);
if (GET_CODE (trueop1) == CONST_DOUBLE)
l2 = CONST_DOUBLE_LOW (trueop1), h2 = CONST_DOUBLE_HIGH (trueop1);
else
l2 = INTVAL (trueop1), h2 = HWI_SIGN_EXTEND (l2);
switch (code)
{
case MINUS:
neg_double (l2, h2, &lv, &hv);
l2 = lv, h2 = hv;
case PLUS:
add_double (l1, h1, l2, h2, &lv, &hv);
break;
case MULT:
mul_double (l1, h1, l2, h2, &lv, &hv);
break;
case DIV: case MOD: case UDIV: case UMOD:
return 0;
case AND:
lv = l1 & l2, hv = h1 & h2;
break;
case IOR:
lv = l1 | l2, hv = h1 | h2;
break;
case XOR:
lv = l1 ^ l2, hv = h1 ^ h2;
break;
case SMIN:
if (h1 < h2
|| (h1 == h2
&& ((unsigned HOST_WIDE_INT) l1
< (unsigned HOST_WIDE_INT) l2)))
lv = l1, hv = h1;
else
lv = l2, hv = h2;
break;
case SMAX:
if (h1 > h2
|| (h1 == h2
&& ((unsigned HOST_WIDE_INT) l1
> (unsigned HOST_WIDE_INT) l2)))
lv = l1, hv = h1;
else
lv = l2, hv = h2;
break;
case UMIN:
if ((unsigned HOST_WIDE_INT) h1 < (unsigned HOST_WIDE_INT) h2
|| (h1 == h2
&& ((unsigned HOST_WIDE_INT) l1
< (unsigned HOST_WIDE_INT) l2)))
lv = l1, hv = h1;
else
lv = l2, hv = h2;
break;
case UMAX:
if ((unsigned HOST_WIDE_INT) h1 > (unsigned HOST_WIDE_INT) h2
|| (h1 == h2
&& ((unsigned HOST_WIDE_INT) l1
> (unsigned HOST_WIDE_INT) l2)))
lv = l1, hv = h1;
else
lv = l2, hv = h2;
break;
case LSHIFTRT: case ASHIFTRT:
case ASHIFT:
case ROTATE: case ROTATERT:
#ifdef SHIFT_COUNT_TRUNCATED
if (SHIFT_COUNT_TRUNCATED)
l2 &= (GET_MODE_BITSIZE (mode) - 1), h2 = 0;
#endif
if (h2 != 0 || l2 >= GET_MODE_BITSIZE (mode))
return 0;
if (code == LSHIFTRT || code == ASHIFTRT)
rshift_double (l1, h1, l2, GET_MODE_BITSIZE (mode), &lv, &hv,
code == ASHIFTRT);
else if (code == ASHIFT)
lshift_double (l1, h1, l2, GET_MODE_BITSIZE (mode), &lv, &hv, 1);
else if (code == ROTATE)
lrotate_double (l1, h1, l2, GET_MODE_BITSIZE (mode), &lv, &hv);
else
rrotate_double (l1, h1, l2, GET_MODE_BITSIZE (mode), &lv, &hv);
break;
default:
return 0;
}
return immed_double_const (lv, hv, mode);
}
if (GET_CODE (op0) != CONST_INT || GET_CODE (op1) != CONST_INT
|| width > HOST_BITS_PER_WIDE_INT || width == 0)
{
switch (code)
{
case PLUS:
if (!HONOR_SIGNED_ZEROS (mode) && trueop1 == CONST0_RTX (mode))
return op0;
if (GET_CODE (op0) == NEG)
return simplify_gen_binary (MINUS, mode, op1, XEXP (op0, 0));
else if (GET_CODE (op1) == NEG)
return simplify_gen_binary (MINUS, mode, op0, XEXP (op1, 0));
if (INTEGRAL_MODE_P (mode)
&& GET_CODE (op0) == NOT
&& trueop1 == const1_rtx)
return gen_rtx_NEG (mode, XEXP (op0, 0));
if (CONSTANT_P (op0) && GET_MODE (op0) != VOIDmode
&& GET_CODE (op1) == CONST_INT)
return plus_constant (op0, INTVAL (op1));
else if (CONSTANT_P (op1) && GET_MODE (op1) != VOIDmode
&& GET_CODE (op0) == CONST_INT)
return plus_constant (op1, INTVAL (op0));
if (! FLOAT_MODE_P (mode))
{
HOST_WIDE_INT coeff0 = 1, coeff1 = 1;
rtx lhs = op0, rhs = op1;
int had_mult = 0;
if (GET_CODE (lhs) == NEG)
coeff0 = -1, lhs = XEXP (lhs, 0);
else if (GET_CODE (lhs) == MULT
&& GET_CODE (XEXP (lhs, 1)) == CONST_INT)
{
coeff0 = INTVAL (XEXP (lhs, 1)), lhs = XEXP (lhs, 0);
had_mult = 1;
}
else if (GET_CODE (lhs) == ASHIFT
&& GET_CODE (XEXP (lhs, 1)) == CONST_INT
&& INTVAL (XEXP (lhs, 1)) >= 0
&& INTVAL (XEXP (lhs, 1)) < HOST_BITS_PER_WIDE_INT)
{
coeff0 = ((HOST_WIDE_INT) 1) << INTVAL (XEXP (lhs, 1));
lhs = XEXP (lhs, 0);
}
if (GET_CODE (rhs) == NEG)
coeff1 = -1, rhs = XEXP (rhs, 0);
else if (GET_CODE (rhs) == MULT
&& GET_CODE (XEXP (rhs, 1)) == CONST_INT)
{
coeff1 = INTVAL (XEXP (rhs, 1)), rhs = XEXP (rhs, 0);
had_mult = 1;
}
else if (GET_CODE (rhs) == ASHIFT
&& GET_CODE (XEXP (rhs, 1)) == CONST_INT
&& INTVAL (XEXP (rhs, 1)) >= 0
&& INTVAL (XEXP (rhs, 1)) < HOST_BITS_PER_WIDE_INT)
{
coeff1 = ((HOST_WIDE_INT) 1) << INTVAL (XEXP (rhs, 1));
rhs = XEXP (rhs, 0);
}
if (rtx_equal_p (lhs, rhs))
{
tem = simplify_gen_binary (MULT, mode, lhs,
GEN_INT (coeff0 + coeff1));
return (GET_CODE (tem) == MULT && ! had_mult) ? 0 : tem;
}
}
if (INTEGRAL_MODE_P (mode)
&& (GET_CODE (op0) == PLUS || GET_CODE (op0) == MINUS
|| GET_CODE (op1) == PLUS || GET_CODE (op1) == MINUS
|| (GET_CODE (op0) == CONST
&& GET_CODE (XEXP (op0, 0)) == PLUS)
|| (GET_CODE (op1) == CONST
&& GET_CODE (XEXP (op1, 0)) == PLUS))
&& (tem = simplify_plus_minus (code, mode, op0, op1, 0)) != 0)
return tem;
break;
case COMPARE:
#ifdef HAVE_cc0
if ((TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT
|| ! FLOAT_MODE_P (mode) || flag_unsafe_math_optimizations)
&& trueop1 == CONST0_RTX (mode))
return op0;
#endif
if (((GET_CODE (op0) == GT && GET_CODE (op1) == LT)
|| (GET_CODE (op0) == GTU && GET_CODE (op1) == LTU))
&& XEXP (op0, 1) == const0_rtx && XEXP (op1, 1) == const0_rtx)
{
rtx xop00 = XEXP (op0, 0);
rtx xop10 = XEXP (op1, 0);
#ifdef HAVE_cc0
if (GET_CODE (xop00) == CC0 && GET_CODE (xop10) == CC0)
#else
if (GET_CODE (xop00) == REG && GET_CODE (xop10) == REG
&& GET_MODE (xop00) == GET_MODE (xop10)
&& REGNO (xop00) == REGNO (xop10)
&& GET_MODE_CLASS (GET_MODE (xop00)) == MODE_CC
&& GET_MODE_CLASS (GET_MODE (xop10)) == MODE_CC)
#endif
return xop00;
}
break;
case MINUS:
if (rtx_equal_p (trueop0, trueop1)
&& ! side_effects_p (op0)
&& (! FLOAT_MODE_P (mode) || flag_unsafe_math_optimizations))
return CONST0_RTX (mode);
if (!HONOR_SIGNED_ZEROS (mode) && trueop0 == CONST0_RTX (mode))
return gen_rtx_NEG (mode, op1);
if (trueop0 == constm1_rtx
&& GET_CODE (op1) != SYMBOL_REF )
return gen_rtx_NOT (mode, op1);
if (!(HONOR_SIGNED_ZEROS (mode)
&& HONOR_SIGN_DEPENDENT_ROUNDING (mode))
&& trueop1 == CONST0_RTX (mode))
return op0;
if (! FLOAT_MODE_P (mode))
{
HOST_WIDE_INT coeff0 = 1, coeff1 = 1;
rtx lhs = op0, rhs = op1;
int had_mult = 0;
if (GET_CODE (lhs) == NEG)
coeff0 = -1, lhs = XEXP (lhs, 0);
else if (GET_CODE (lhs) == MULT
&& GET_CODE (XEXP (lhs, 1)) == CONST_INT)
{
coeff0 = INTVAL (XEXP (lhs, 1)), lhs = XEXP (lhs, 0);
had_mult = 1;
}
else if (GET_CODE (lhs) == ASHIFT
&& GET_CODE (XEXP (lhs, 1)) == CONST_INT
&& INTVAL (XEXP (lhs, 1)) >= 0
&& INTVAL (XEXP (lhs, 1)) < HOST_BITS_PER_WIDE_INT)
{
coeff0 = ((HOST_WIDE_INT) 1) << INTVAL (XEXP (lhs, 1));
lhs = XEXP (lhs, 0);
}
if (GET_CODE (rhs) == NEG)
coeff1 = - 1, rhs = XEXP (rhs, 0);
else if (GET_CODE (rhs) == MULT
&& GET_CODE (XEXP (rhs, 1)) == CONST_INT)
{
coeff1 = INTVAL (XEXP (rhs, 1)), rhs = XEXP (rhs, 0);
had_mult = 1;
}
else if (GET_CODE (rhs) == ASHIFT
&& GET_CODE (XEXP (rhs, 1)) == CONST_INT
&& INTVAL (XEXP (rhs, 1)) >= 0
&& INTVAL (XEXP (rhs, 1)) < HOST_BITS_PER_WIDE_INT)
{
coeff1 = ((HOST_WIDE_INT) 1) << INTVAL (XEXP (rhs, 1));
rhs = XEXP (rhs, 0);
}
if (rtx_equal_p (lhs, rhs))
{
tem = simplify_gen_binary (MULT, mode, lhs,
GEN_INT (coeff0 - coeff1));
return (GET_CODE (tem) == MULT && ! had_mult) ? 0 : tem;
}
}
if (GET_CODE (op1) == NEG)
return simplify_gen_binary (PLUS, mode, op0, XEXP (op1, 0));
if (INTEGRAL_MODE_P (mode)
&& (GET_CODE (op0) == PLUS || GET_CODE (op0) == MINUS
|| GET_CODE (op1) == PLUS || GET_CODE (op1) == MINUS
|| (GET_CODE (op0) == CONST
&& GET_CODE (XEXP (op0, 0)) == PLUS)
|| (GET_CODE (op1) == CONST
&& GET_CODE (XEXP (op1, 0)) == PLUS))
&& (tem = simplify_plus_minus (code, mode, op0, op1, 0)) != 0)
return tem;
if (GET_CODE (op1) == CONST_INT && GET_MODE (op0) != VOIDmode)
return simplify_gen_binary (PLUS, mode,
op0,
neg_const_int (mode, op1));
if (GET_CODE (op1) == AND)
{
if (rtx_equal_p (op0, XEXP (op1, 0)))
return simplify_gen_binary (AND, mode, op0,
gen_rtx_NOT (mode, XEXP (op1, 1)));
if (rtx_equal_p (op0, XEXP (op1, 1)))
return simplify_gen_binary (AND, mode, op0,
gen_rtx_NOT (mode, XEXP (op1, 0)));
}
break;
case MULT:
if (trueop1 == constm1_rtx)
{
tem = simplify_unary_operation (NEG, mode, op0, mode);
return tem ? tem : gen_rtx_NEG (mode, op0);
}
if (!HONOR_NANS (mode)
&& !HONOR_SIGNED_ZEROS (mode)
&& trueop1 == CONST0_RTX (mode)
&& ! side_effects_p (op0))
return op1;
if (!HONOR_SNANS (mode)
&& trueop1 == CONST1_RTX (mode))
return op0;
if (GET_CODE (trueop1) == CONST_INT
&& (val = exact_log2 (INTVAL (trueop1))) >= 0
&& (width <= HOST_BITS_PER_WIDE_INT
|| val != HOST_BITS_PER_WIDE_INT - 1)
&& ! rtx_equal_function_value_matters)
return gen_rtx_ASHIFT (mode, op0, GEN_INT (val));
if (GET_CODE (trueop1) == CONST_DOUBLE
&& GET_MODE_CLASS (GET_MODE (trueop1)) == MODE_FLOAT
&& GET_MODE (op0) == mode)
{
REAL_VALUE_TYPE d;
REAL_VALUE_FROM_CONST_DOUBLE (d, trueop1);
if (REAL_VALUES_EQUAL (d, dconst2))
return gen_rtx_PLUS (mode, op0, copy_rtx (op0));
if (REAL_VALUES_EQUAL (d, dconstm1))
return gen_rtx_NEG (mode, op0);
}
break;
case IOR:
if (trueop1 == const0_rtx)
return op0;
if (GET_CODE (trueop1) == CONST_INT
&& ((INTVAL (trueop1) & GET_MODE_MASK (mode))
== GET_MODE_MASK (mode)))
return op1;
if (rtx_equal_p (trueop0, trueop1) && ! side_effects_p (op0))
return op0;
if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1))
|| (GET_CODE (op1) == NOT && rtx_equal_p (XEXP (op1, 0), op0)))
&& ! side_effects_p (op0)
&& GET_MODE_CLASS (mode) != MODE_CC)
return constm1_rtx;
break;
case XOR:
if (trueop1 == const0_rtx)
return op0;
if (GET_CODE (trueop1) == CONST_INT
&& ((INTVAL (trueop1) & GET_MODE_MASK (mode))
== GET_MODE_MASK (mode)))
return gen_rtx_NOT (mode, op0);
if (trueop0 == trueop1 && ! side_effects_p (op0)
&& GET_MODE_CLASS (mode) != MODE_CC)
return const0_rtx;
break;
case AND:
if (trueop1 == const0_rtx && ! side_effects_p (op0))
return const0_rtx;
if (GET_CODE (trueop1) == CONST_INT
&& ((INTVAL (trueop1) & GET_MODE_MASK (mode))
== GET_MODE_MASK (mode)))
return op0;
if (trueop0 == trueop1 && ! side_effects_p (op0)
&& GET_MODE_CLASS (mode) != MODE_CC)
return op0;
if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1))
|| (GET_CODE (op1) == NOT && rtx_equal_p (XEXP (op1, 0), op0)))
&& ! side_effects_p (op0)
&& GET_MODE_CLASS (mode) != MODE_CC)
return const0_rtx;
break;
case UDIV:
if (GET_CODE (trueop1) == CONST_INT
&& (arg1 = exact_log2 (INTVAL (trueop1))) > 0)
return gen_rtx_LSHIFTRT (mode, op0, GEN_INT (arg1));
case DIV:
if (trueop1 == CONST1_RTX (mode))
{
rtx x = gen_lowpart_common (mode, op0);
if (x)
return x;
else if (mode != GET_MODE (op0) && GET_MODE (op0) != VOIDmode)
return gen_lowpart_SUBREG (mode, op0);
else
return op0;
}
if (!HONOR_NANS (mode)
&& !HONOR_SIGNED_ZEROS (mode)
&& trueop0 == CONST0_RTX (mode)
&& ! side_effects_p (op1))
return op0;
else if (GET_CODE (trueop1) == CONST_DOUBLE
&& GET_MODE_CLASS (GET_MODE (trueop1)) == MODE_FLOAT
&& trueop1 != CONST0_RTX (mode)
&& flag_unsafe_math_optimizations)
{
REAL_VALUE_TYPE d;
REAL_VALUE_FROM_CONST_DOUBLE (d, trueop1);
if (! REAL_VALUES_EQUAL (d, dconst0))
{
REAL_ARITHMETIC (d, rtx_to_tree_code (DIV), dconst1, d);
return gen_rtx_MULT (mode, op0,
CONST_DOUBLE_FROM_REAL_VALUE (d, mode));
}
}
break;
case UMOD:
if (GET_CODE (trueop1) == CONST_INT
&& exact_log2 (INTVAL (trueop1)) > 0)
return gen_rtx_AND (mode, op0, GEN_INT (INTVAL (op1) - 1));
case MOD:
if ((trueop0 == const0_rtx || trueop1 == const1_rtx)
&& ! side_effects_p (op0) && ! side_effects_p (op1))
return const0_rtx;
break;
case ROTATERT:
case ROTATE:
if (GET_CODE (trueop0) == CONST_INT && width <= HOST_BITS_PER_WIDE_INT
&& (unsigned HOST_WIDE_INT) INTVAL (trueop0) == GET_MODE_MASK (mode)
&& ! side_effects_p (op1))
return op0;
case ASHIFT:
case ASHIFTRT:
case LSHIFTRT:
if (trueop1 == const0_rtx)
return op0;
if (trueop0 == const0_rtx && ! side_effects_p (op1))
return op0;
break;
case SMIN:
if (width <= HOST_BITS_PER_WIDE_INT && GET_CODE (trueop1) == CONST_INT
&& INTVAL (trueop1) == (HOST_WIDE_INT) 1 << (width -1)
&& ! side_effects_p (op0))
return op1;
else if (rtx_equal_p (trueop0, trueop1) && ! side_effects_p (op0))
return op0;
break;
case SMAX:
if (width <= HOST_BITS_PER_WIDE_INT && GET_CODE (trueop1) == CONST_INT
&& ((unsigned HOST_WIDE_INT) INTVAL (trueop1)
== (unsigned HOST_WIDE_INT) GET_MODE_MASK (mode) >> 1)
&& ! side_effects_p (op0))
return op1;
else if (rtx_equal_p (trueop0, trueop1) && ! side_effects_p (op0))
return op0;
break;
case UMIN:
if (trueop1 == const0_rtx && ! side_effects_p (op0))
return op1;
else if (rtx_equal_p (trueop0, trueop1) && ! side_effects_p (op0))
return op0;
break;
case UMAX:
if (trueop1 == constm1_rtx && ! side_effects_p (op0))
return op1;
else if (rtx_equal_p (trueop0, trueop1) && ! side_effects_p (op0))
return op0;
break;
case SS_PLUS:
case US_PLUS:
case SS_MINUS:
case US_MINUS:
return 0;
case VEC_SELECT:
case VEC_CONCAT:
return 0;
default:
abort ();
}
return 0;
}
arg0 = INTVAL (trueop0);
arg1 = INTVAL (trueop1);
if (width < HOST_BITS_PER_WIDE_INT)
{
arg0 &= ((HOST_WIDE_INT) 1 << width) - 1;
arg1 &= ((HOST_WIDE_INT) 1 << width) - 1;
arg0s = arg0;
if (arg0s & ((HOST_WIDE_INT) 1 << (width - 1)))
arg0s |= ((HOST_WIDE_INT) (-1) << width);
arg1s = arg1;
if (arg1s & ((HOST_WIDE_INT) 1 << (width - 1)))
arg1s |= ((HOST_WIDE_INT) (-1) << width);
}
else
{
arg0s = arg0;
arg1s = arg1;
}
switch (code)
{
case PLUS:
val = arg0s + arg1s;
break;
case MINUS:
val = arg0s - arg1s;
break;
case MULT:
val = arg0s * arg1s;
break;
case DIV:
if (arg1s == 0
|| (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1)
&& arg1s == -1))
return 0;
val = arg0s / arg1s;
break;
case MOD:
if (arg1s == 0
|| (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1)
&& arg1s == -1))
return 0;
val = arg0s % arg1s;
break;
case UDIV:
if (arg1 == 0
|| (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1)
&& arg1s == -1))
return 0;
val = (unsigned HOST_WIDE_INT) arg0 / arg1;
break;
case UMOD:
if (arg1 == 0
|| (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1)
&& arg1s == -1))
return 0;
val = (unsigned HOST_WIDE_INT) arg0 % arg1;
break;
case AND:
val = arg0 & arg1;
break;
case IOR:
val = arg0 | arg1;
break;
case XOR:
val = arg0 ^ arg1;
break;
case LSHIFTRT:
if (arg1 < 0)
return 0;
#ifdef SHIFT_COUNT_TRUNCATED
if (SHIFT_COUNT_TRUNCATED)
arg1 %= width;
#endif
val = ((unsigned HOST_WIDE_INT) arg0) >> arg1;
break;
case ASHIFT:
if (arg1 < 0)
return 0;
#ifdef SHIFT_COUNT_TRUNCATED
if (SHIFT_COUNT_TRUNCATED)
arg1 %= width;
#endif
val = ((unsigned HOST_WIDE_INT) arg0) << arg1;
break;
case ASHIFTRT:
if (arg1 < 0)
return 0;
#ifdef SHIFT_COUNT_TRUNCATED
if (SHIFT_COUNT_TRUNCATED)
arg1 %= width;
#endif
val = arg0s >> arg1;
if (arg0s < 0 && arg1 > 0)
val |= ((HOST_WIDE_INT) -1) << (HOST_BITS_PER_WIDE_INT - arg1);
break;
case ROTATERT:
if (arg1 < 0)
return 0;
arg1 %= width;
val = ((((unsigned HOST_WIDE_INT) arg0) << (width - arg1))
| (((unsigned HOST_WIDE_INT) arg0) >> arg1));
break;
case ROTATE:
if (arg1 < 0)
return 0;
arg1 %= width;
val = ((((unsigned HOST_WIDE_INT) arg0) << arg1)
| (((unsigned HOST_WIDE_INT) arg0) >> (width - arg1)));
break;
case COMPARE:
return 0;
case SMIN:
val = arg0s <= arg1s ? arg0s : arg1s;
break;
case UMIN:
val = ((unsigned HOST_WIDE_INT) arg0
<= (unsigned HOST_WIDE_INT) arg1 ? arg0 : arg1);
break;
case SMAX:
val = arg0s > arg1s ? arg0s : arg1s;
break;
case UMAX:
val = ((unsigned HOST_WIDE_INT) arg0
> (unsigned HOST_WIDE_INT) arg1 ? arg0 : arg1);
break;
default:
abort ();
}
val = trunc_int_for_mode (val, mode);
return GEN_INT (val);
}
struct simplify_plus_minus_op_data
{
rtx op;
int neg;
};
static int
simplify_plus_minus_op_data_cmp (p1, p2)
const void *p1;
const void *p2;
{
const struct simplify_plus_minus_op_data *d1 = p1;
const struct simplify_plus_minus_op_data *d2 = p2;
return (commutative_operand_precedence (d2->op)
- commutative_operand_precedence (d1->op));
}
static rtx
simplify_plus_minus (code, mode, op0, op1, force)
enum rtx_code code;
enum machine_mode mode;
rtx op0, op1;
int force;
{
struct simplify_plus_minus_op_data ops[8];
rtx result, tem;
int n_ops = 2, input_ops = 2, input_consts = 0, n_consts;
int first, negate, changed;
int i, j;
memset ((char *) ops, 0, sizeof ops);
ops[0].op = op0;
ops[0].neg = 0;
ops[1].op = op1;
ops[1].neg = (code == MINUS);
do
{
changed = 0;
for (i = 0; i < n_ops; i++)
{
rtx this_op = ops[i].op;
int this_neg = ops[i].neg;
enum rtx_code this_code = GET_CODE (this_op);
switch (this_code)
{
case PLUS:
case MINUS:
if (n_ops == 7)
return NULL_RTX;
ops[n_ops].op = XEXP (this_op, 1);
ops[n_ops].neg = (this_code == MINUS) ^ this_neg;
n_ops++;
ops[i].op = XEXP (this_op, 0);
input_ops++;
changed = 1;
break;
case NEG:
ops[i].op = XEXP (this_op, 0);
ops[i].neg = ! this_neg;
changed = 1;
break;
case CONST:
if (n_ops < 7
&& GET_CODE (XEXP (this_op, 0)) == PLUS
&& CONSTANT_P (XEXP (XEXP (this_op, 0), 0))
&& CONSTANT_P (XEXP (XEXP (this_op, 0), 1)))
{
ops[i].op = XEXP (XEXP (this_op, 0), 0);
ops[n_ops].op = XEXP (XEXP (this_op, 0), 1);
ops[n_ops].neg = this_neg;
n_ops++;
input_consts++;
changed = 1;
}
break;
case NOT:
if (n_ops != 7)
{
ops[n_ops].op = constm1_rtx;
ops[n_ops++].neg = this_neg;
ops[i].op = XEXP (this_op, 0);
ops[i].neg = !this_neg;
changed = 1;
}
break;
case CONST_INT:
if (this_neg)
{
ops[i].op = neg_const_int (mode, this_op);
ops[i].neg = 0;
changed = 1;
}
break;
default:
break;
}
}
}
while (changed);
if (n_ops <= 2 && !force)
return NULL_RTX;
for (i = 0; i < n_ops; i++)
if (GET_CODE (ops[i].op) == CONST)
input_consts++;
first = 1;
do
{
changed = first;
for (i = 0; i < n_ops - 1; i++)
for (j = i + 1; j < n_ops; j++)
{
rtx lhs = ops[i].op, rhs = ops[j].op;
int lneg = ops[i].neg, rneg = ops[j].neg;
if (lhs != 0 && rhs != 0
&& (! first || (CONSTANT_P (lhs) && CONSTANT_P (rhs))))
{
enum rtx_code ncode = PLUS;
if (lneg != rneg)
{
ncode = MINUS;
if (lneg)
tem = lhs, lhs = rhs, rhs = tem;
}
else if (swap_commutative_operands_p (lhs, rhs))
tem = lhs, lhs = rhs, rhs = tem;
tem = simplify_binary_operation (ncode, mode, lhs, rhs);
if (tem
&& ! (GET_CODE (tem) == CONST
&& GET_CODE (XEXP (tem, 0)) == ncode
&& XEXP (XEXP (tem, 0), 0) == lhs
&& XEXP (XEXP (tem, 0), 1) == rhs)
&& ! (first
&& GET_CODE (tem) == NOT
&& XEXP (tem, 0) == rhs))
{
lneg &= rneg;
if (GET_CODE (tem) == NEG)
tem = XEXP (tem, 0), lneg = !lneg;
if (GET_CODE (tem) == CONST_INT && lneg)
tem = neg_const_int (mode, tem), lneg = 0;
ops[i].op = tem;
ops[i].neg = lneg;
ops[j].op = NULL_RTX;
changed = 1;
}
}
}
first = 0;
}
while (changed);
for (i = 0, j = 0; j < n_ops; j++)
if (ops[j].op)
ops[i++] = ops[j];
n_ops = i;
qsort (ops, n_ops, sizeof (*ops), simplify_plus_minus_op_data_cmp);
if (n_ops > 1
&& GET_CODE (ops[n_ops - 1].op) == CONST_INT
&& CONSTANT_P (ops[n_ops - 2].op))
{
rtx value = ops[n_ops - 1].op;
if (ops[n_ops - 1].neg ^ ops[n_ops - 2].neg)
value = neg_const_int (mode, value);
ops[n_ops - 2].op = plus_constant (ops[n_ops - 2].op, INTVAL (value));
n_ops--;
}
n_consts = 0;
for (i = 0; i < n_ops; i++)
if (GET_CODE (ops[i].op) == CONST)
n_consts++;
if (!force
&& (n_ops + n_consts > input_ops
|| (n_ops + n_consts == input_ops && n_consts <= input_consts)))
return NULL_RTX;
negate = 0;
for (i = 0; i < n_ops && ops[i].neg; i++)
continue;
if (i == n_ops)
{
for (i = 0; i < n_ops; i++)
ops[i].neg = 0;
negate = 1;
}
else if (i != 0)
{
tem = ops[0].op;
ops[0] = ops[i];
ops[i].op = tem;
ops[i].neg = 1;
}
result = ops[0].op;
for (i = 1; i < n_ops; i++)
result = gen_rtx_fmt_ee (ops[i].neg ? MINUS : PLUS,
mode, result, ops[i].op);
return negate ? gen_rtx_NEG (mode, result) : result;
}
rtx
simplify_relational_operation (code, mode, op0, op1)
enum rtx_code code;
enum machine_mode mode;
rtx op0, op1;
{
int equal, op0lt, op0ltu, op1lt, op1ltu;
rtx tem;
rtx trueop0;
rtx trueop1;
if (mode == VOIDmode
&& (GET_MODE (op0) != VOIDmode
|| GET_MODE (op1) != VOIDmode))
abort ();
if (GET_CODE (op0) == COMPARE && op1 == const0_rtx)
op1 = XEXP (op0, 1), op0 = XEXP (op0, 0);
trueop0 = avoid_constant_pool_reference (op0);
trueop1 = avoid_constant_pool_reference (op1);
if (GET_MODE_CLASS (GET_MODE (op0)) == MODE_CC
#ifdef HAVE_cc0
|| op0 == cc0_rtx
#endif
)
return 0;
if (swap_commutative_operands_p (trueop0, trueop1))
{
tem = op0, op0 = op1, op1 = tem;
tem = trueop0, trueop0 = trueop1, trueop1 = tem;
code = swap_condition (code);
}
if (INTEGRAL_MODE_P (mode) && trueop1 != const0_rtx
&& ! ((GET_CODE (op0) == REG || GET_CODE (trueop0) == CONST_INT)
&& (GET_CODE (op1) == REG || GET_CODE (trueop1) == CONST_INT))
&& 0 != (tem = simplify_binary_operation (MINUS, mode, op0, op1))
&& code != GTU && code != GEU && code != LTU && code != LEU)
return simplify_relational_operation (signed_condition (code),
mode, tem, const0_rtx);
if (flag_unsafe_math_optimizations && code == ORDERED)
return const_true_rtx;
if (flag_unsafe_math_optimizations && code == UNORDERED)
return const0_rtx;
if (!HONOR_NANS (GET_MODE (trueop0)) && rtx_equal_p (trueop0, trueop1))
equal = 1, op0lt = 0, op0ltu = 0, op1lt = 0, op1ltu = 0;
else if (GET_CODE (trueop0) == CONST_DOUBLE
&& GET_CODE (trueop1) == CONST_DOUBLE
&& GET_MODE_CLASS (GET_MODE (trueop0)) == MODE_FLOAT)
{
REAL_VALUE_TYPE d0, d1;
REAL_VALUE_FROM_CONST_DOUBLE (d0, trueop0);
REAL_VALUE_FROM_CONST_DOUBLE (d1, trueop1);
if (REAL_VALUE_ISNAN (d0) || REAL_VALUE_ISNAN (d1))
switch (code)
{
case UNEQ:
case UNLT:
case UNGT:
case UNLE:
case UNGE:
case NE:
case UNORDERED:
return const_true_rtx;
case EQ:
case LT:
case GT:
case LE:
case GE:
case LTGT:
case ORDERED:
return const0_rtx;
default:
return 0;
}
equal = REAL_VALUES_EQUAL (d0, d1);
op0lt = op0ltu = REAL_VALUES_LESS (d0, d1);
op1lt = op1ltu = REAL_VALUES_LESS (d1, d0);
}
else if ((GET_MODE_CLASS (mode) == MODE_INT || mode == VOIDmode)
&& (GET_CODE (trueop0) == CONST_DOUBLE
|| GET_CODE (trueop0) == CONST_INT)
&& (GET_CODE (trueop1) == CONST_DOUBLE
|| GET_CODE (trueop1) == CONST_INT))
{
int width = GET_MODE_BITSIZE (mode);
HOST_WIDE_INT l0s, h0s, l1s, h1s;
unsigned HOST_WIDE_INT l0u, h0u, l1u, h1u;
if (GET_CODE (trueop0) == CONST_DOUBLE)
{
l0u = l0s = CONST_DOUBLE_LOW (trueop0);
h0u = h0s = CONST_DOUBLE_HIGH (trueop0);
}
else
{
l0u = l0s = INTVAL (trueop0);
h0u = h0s = HWI_SIGN_EXTEND (l0s);
}
if (GET_CODE (trueop1) == CONST_DOUBLE)
{
l1u = l1s = CONST_DOUBLE_LOW (trueop1);
h1u = h1s = CONST_DOUBLE_HIGH (trueop1);
}
else
{
l1u = l1s = INTVAL (trueop1);
h1u = h1s = HWI_SIGN_EXTEND (l1s);
}
if (width != 0 && width < HOST_BITS_PER_WIDE_INT)
{
l0u &= ((HOST_WIDE_INT) 1 << width) - 1;
l1u &= ((HOST_WIDE_INT) 1 << width) - 1;
if (l0s & ((HOST_WIDE_INT) 1 << (width - 1)))
l0s |= ((HOST_WIDE_INT) (-1) << width);
if (l1s & ((HOST_WIDE_INT) 1 << (width - 1)))
l1s |= ((HOST_WIDE_INT) (-1) << width);
}
if (width != 0 && width <= HOST_BITS_PER_WIDE_INT)
h0u = h1u = 0, h0s = HWI_SIGN_EXTEND (l0s), h1s = HWI_SIGN_EXTEND (l1s);
equal = (h0u == h1u && l0u == l1u);
op0lt = (h0s < h1s || (h0s == h1s && l0u < l1u));
op1lt = (h1s < h0s || (h1s == h0s && l1u < l0u));
op0ltu = (h0u < h1u || (h0u == h1u && l0u < l1u));
op1ltu = (h1u < h0u || (h1u == h0u && l1u < l0u));
}
else
{
switch (code)
{
case EQ:
if (((NONZERO_BASE_PLUS_P (op0) && trueop1 == const0_rtx)
|| GET_CODE (trueop0) == LABEL_REF)
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& op0 != arg_pointer_rtx
#endif
)
return const0_rtx;
break;
case NE:
if (((NONZERO_BASE_PLUS_P (op0) && trueop1 == const0_rtx)
|| GET_CODE (trueop0) == LABEL_REF)
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& op0 != arg_pointer_rtx
#endif
)
return const_true_rtx;
break;
case GEU:
if (trueop1 == const0_rtx)
return const_true_rtx;
break;
case LTU:
if (trueop1 == const0_rtx)
return const0_rtx;
break;
case LEU:
if (GET_CODE (trueop1) == CONST_INT
&& (unsigned HOST_WIDE_INT) INTVAL (trueop1) == GET_MODE_MASK (mode)
&& INTEGRAL_MODE_P (mode))
return const_true_rtx;
break;
case GTU:
if (GET_CODE (trueop1) == CONST_INT
&& (unsigned HOST_WIDE_INT) INTVAL (trueop1) == GET_MODE_MASK (mode)
&& INTEGRAL_MODE_P (mode))
return const0_rtx;
break;
case LT:
if (trueop1 == CONST0_RTX (mode) && !HONOR_SNANS (mode))
{
tem = GET_CODE (trueop0) == FLOAT_EXTEND ? XEXP (trueop0, 0)
: trueop0;
if (GET_CODE (tem) == ABS)
return const0_rtx;
}
break;
case GE:
if (trueop1 == CONST0_RTX (mode) && !HONOR_NANS (mode))
{
tem = GET_CODE (trueop0) == FLOAT_EXTEND ? XEXP (trueop0, 0)
: trueop0;
if (GET_CODE (tem) == ABS)
return const1_rtx;
}
break;
default:
break;
}
return 0;
}
switch (code)
{
case EQ:
case UNEQ:
return equal ? const_true_rtx : const0_rtx;
case NE:
case LTGT:
return ! equal ? const_true_rtx : const0_rtx;
case LT:
case UNLT:
return op0lt ? const_true_rtx : const0_rtx;
case GT:
case UNGT:
return op1lt ? const_true_rtx : const0_rtx;
case LTU:
return op0ltu ? const_true_rtx : const0_rtx;
case GTU:
return op1ltu ? const_true_rtx : const0_rtx;
case LE:
case UNLE:
return equal || op0lt ? const_true_rtx : const0_rtx;
case GE:
case UNGE:
return equal || op1lt ? const_true_rtx : const0_rtx;
case LEU:
return equal || op0ltu ? const_true_rtx : const0_rtx;
case GEU:
return equal || op1ltu ? const_true_rtx : const0_rtx;
case ORDERED:
return const_true_rtx;
case UNORDERED:
return const0_rtx;
default:
abort ();
}
}
rtx
simplify_ternary_operation (code, mode, op0_mode, op0, op1, op2)
enum rtx_code code;
enum machine_mode mode, op0_mode;
rtx op0, op1, op2;
{
unsigned int width = GET_MODE_BITSIZE (mode);
if (width == 0)
width = HOST_BITS_PER_WIDE_INT;
switch (code)
{
case SIGN_EXTRACT:
case ZERO_EXTRACT:
if (GET_CODE (op0) == CONST_INT
&& GET_CODE (op1) == CONST_INT
&& GET_CODE (op2) == CONST_INT
&& ((unsigned) INTVAL (op1) + (unsigned) INTVAL (op2) <= width)
&& width <= (unsigned) HOST_BITS_PER_WIDE_INT)
{
HOST_WIDE_INT val = INTVAL (op0);
if (BITS_BIG_ENDIAN)
val >>= (GET_MODE_BITSIZE (op0_mode)
- INTVAL (op2) - INTVAL (op1));
else
val >>= INTVAL (op2);
if (HOST_BITS_PER_WIDE_INT != INTVAL (op1))
{
val &= ((HOST_WIDE_INT) 1 << INTVAL (op1)) - 1;
if (code == SIGN_EXTRACT
&& (val & ((HOST_WIDE_INT) 1 << (INTVAL (op1) - 1))))
val |= ~ (((HOST_WIDE_INT) 1 << INTVAL (op1)) - 1);
}
if (width < HOST_BITS_PER_WIDE_INT
&& ((val & ((HOST_WIDE_INT) (-1) << (width - 1)))
!= ((HOST_WIDE_INT) (-1) << (width - 1))))
val &= ((HOST_WIDE_INT) 1 << width) - 1;
return GEN_INT (val);
}
break;
case IF_THEN_ELSE:
if (GET_CODE (op0) == CONST_INT)
return op0 != const0_rtx ? op1 : op2;
if (GET_CODE (op0) == NE && ! side_effects_p (op0)
&& !HONOR_NANS (mode)
&& rtx_equal_p (XEXP (op0, 0), op1)
&& rtx_equal_p (XEXP (op0, 1), op2))
return op1;
else if (GET_CODE (op0) == EQ && ! side_effects_p (op0)
&& !HONOR_NANS (mode)
&& rtx_equal_p (XEXP (op0, 1), op1)
&& rtx_equal_p (XEXP (op0, 0), op2))
return op2;
else if (GET_RTX_CLASS (GET_CODE (op0)) == '<' && ! side_effects_p (op0))
{
enum machine_mode cmp_mode = (GET_MODE (XEXP (op0, 0)) == VOIDmode
? GET_MODE (XEXP (op0, 1))
: GET_MODE (XEXP (op0, 0)));
rtx temp;
if (cmp_mode == VOIDmode)
cmp_mode = op0_mode;
temp = simplify_relational_operation (GET_CODE (op0), cmp_mode,
XEXP (op0, 0), XEXP (op0, 1));
if (temp == const0_rtx)
return op2;
else if (temp == const1_rtx)
return op1;
else if (temp)
op0 = temp;
if (GET_CODE (op1) == CONST_INT && GET_CODE (op2) == CONST_INT)
{
HOST_WIDE_INT t = INTVAL (op1);
HOST_WIDE_INT f = INTVAL (op2);
if (t == STORE_FLAG_VALUE && f == 0)
code = GET_CODE (op0);
else if (t == 0 && f == STORE_FLAG_VALUE)
{
enum rtx_code tmp;
tmp = reversed_comparison_code (op0, NULL_RTX);
if (tmp == UNKNOWN)
break;
code = tmp;
}
else
break;
return gen_rtx_fmt_ee (code, mode, XEXP (op0, 0), XEXP (op0, 1));
}
}
break;
case VEC_MERGE:
if (GET_MODE (op0) != mode
|| GET_MODE (op1) != mode
|| !VECTOR_MODE_P (mode))
abort ();
op0 = avoid_constant_pool_reference (op0);
op1 = avoid_constant_pool_reference (op1);
op2 = avoid_constant_pool_reference (op2);
if (GET_CODE (op0) == CONST_VECTOR
&& GET_CODE (op1) == CONST_VECTOR
&& GET_CODE (op2) == CONST_INT)
{
int elt_size = GET_MODE_SIZE (GET_MODE_INNER (mode));
unsigned n_elts = (GET_MODE_SIZE (mode) / elt_size);
rtvec v = rtvec_alloc (n_elts);
unsigned int i;
for (i = 0; i < n_elts; i++)
RTVEC_ELT (v, i) = (INTVAL (op2) & (1 << i)
? CONST_VECTOR_ELT (op0, i)
: CONST_VECTOR_ELT (op1, i));
return gen_rtx_CONST_VECTOR (mode, v);
}
break;
default:
abort ();
}
return 0;
}
rtx
simplify_subreg (outermode, op, innermode, byte)
rtx op;
unsigned int byte;
enum machine_mode outermode, innermode;
{
if (innermode == VOIDmode || outermode == VOIDmode
|| innermode == BLKmode || outermode == BLKmode)
abort ();
if (GET_MODE (op) != innermode
&& GET_MODE (op) != VOIDmode)
abort ();
if (byte % GET_MODE_SIZE (outermode)
|| byte >= GET_MODE_SIZE (innermode))
abort ();
if (outermode == innermode && !byte)
return op;
if (GET_CODE (op) == CONST_VECTOR)
{
int elt_size = GET_MODE_SIZE (GET_MODE_INNER (innermode));
const unsigned int offset = byte / elt_size;
rtx elt;
if (GET_MODE_INNER (innermode) == outermode)
{
elt = CONST_VECTOR_ELT (op, offset);
return copy_rtx (elt);
}
else if (GET_MODE_INNER (innermode) == GET_MODE_INNER (outermode)
&& GET_MODE_SIZE (innermode) > GET_MODE_SIZE (outermode))
{
return (gen_rtx_CONST_VECTOR
(outermode,
gen_rtvec_v (GET_MODE_NUNITS (outermode),
&CONST_VECTOR_ELT (op, offset))));
}
else if (GET_MODE_CLASS (outermode) == MODE_INT
&& (GET_MODE_SIZE (outermode) % elt_size == 0))
{
HOST_WIDE_INT sum = 0, high = 0;
unsigned n_elts = (GET_MODE_SIZE (outermode) / elt_size);
unsigned i = BYTES_BIG_ENDIAN ? offset : offset + n_elts - 1;
unsigned step = BYTES_BIG_ENDIAN ? 1 : -1;
int shift = BITS_PER_UNIT * elt_size;
for (; n_elts--; i += step)
{
elt = CONST_VECTOR_ELT (op, i);
if (GET_CODE (elt) == CONST_DOUBLE
&& GET_MODE_CLASS (GET_MODE (elt)) == MODE_FLOAT)
{
elt = gen_lowpart_common (int_mode_for_mode (GET_MODE (elt)),
elt);
if (! elt)
return NULL_RTX;
}
if (GET_CODE (elt) != CONST_INT)
return NULL_RTX;
if (high >> (HOST_BITS_PER_WIDE_INT - shift))
return NULL_RTX;
high = high << shift | sum >> (HOST_BITS_PER_WIDE_INT - shift);
sum = (sum << shift) + INTVAL (elt);
}
if (GET_MODE_BITSIZE (outermode) <= HOST_BITS_PER_WIDE_INT)
return GEN_INT (trunc_int_for_mode (sum, outermode));
else if (GET_MODE_BITSIZE (outermode) == 2* HOST_BITS_PER_WIDE_INT)
return immed_double_const (sum, high, outermode);
else
return NULL_RTX;
}
else if (GET_MODE_CLASS (outermode) == MODE_INT
&& (elt_size % GET_MODE_SIZE (outermode) == 0))
{
enum machine_mode new_mode
= int_mode_for_mode (GET_MODE_INNER (innermode));
int subbyte = byte % elt_size;
op = simplify_subreg (new_mode, op, innermode, byte - subbyte);
if (! op)
return NULL_RTX;
return simplify_subreg (outermode, op, new_mode, subbyte);
}
else if (GET_MODE_CLASS (outermode) == MODE_INT)
return NULL_RTX;
}
if (CONSTANT_P (op))
{
int offset, part;
unsigned HOST_WIDE_INT val = 0;
if (GET_MODE_CLASS (outermode) == MODE_VECTOR_INT
|| GET_MODE_CLASS (outermode) == MODE_VECTOR_FLOAT)
{
enum machine_mode submode = GET_MODE_INNER (outermode);
int subsize = GET_MODE_UNIT_SIZE (outermode);
int i, elts = GET_MODE_NUNITS (outermode);
rtvec v = rtvec_alloc (elts);
rtx elt;
for (i = 0; i < elts; i++, byte += subsize)
{
if (byte >= GET_MODE_UNIT_SIZE (innermode))
elt = CONST0_RTX (submode);
else
elt = simplify_subreg (submode, op, innermode, byte);
if (! elt)
return NULL_RTX;
RTVEC_ELT (v, i) = elt;
}
return gen_rtx_CONST_VECTOR (outermode, v);
}
if (subreg_lowpart_offset (outermode, innermode) == byte
&& GET_CODE (op) != CONST_VECTOR)
{
rtx new = gen_lowpart_if_possible (outermode, op);
if (new)
return new;
}
if (GET_MODE_SIZE (outermode) == UNITS_PER_WORD
&& GET_MODE_SIZE (innermode) > UNITS_PER_WORD
&& GET_MODE_CLASS (outermode) == MODE_INT)
{
rtx new = constant_subword (op,
(byte / UNITS_PER_WORD),
innermode);
if (new)
return new;
}
if (GET_MODE_CLASS (outermode) != MODE_INT
&& GET_MODE_CLASS (outermode) != MODE_CC)
{
enum machine_mode new_mode = int_mode_for_mode (outermode);
if (new_mode != innermode || byte != 0)
{
op = simplify_subreg (new_mode, op, innermode, byte);
if (! op)
return NULL_RTX;
return simplify_subreg (outermode, op, new_mode, 0);
}
}
offset = byte * BITS_PER_UNIT;
switch (GET_CODE (op))
{
case CONST_DOUBLE:
if (GET_MODE (op) != VOIDmode)
break;
if (HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_INT && GET_MODE_BITSIZE (outermode) >= HOST_BITS_PER_WIDE_INT)
return NULL_RTX;
part = offset >= HOST_BITS_PER_WIDE_INT;
if ((BITS_PER_WORD > HOST_BITS_PER_WIDE_INT
&& BYTES_BIG_ENDIAN)
|| (BITS_PER_WORD <= HOST_BITS_PER_WIDE_INT
&& WORDS_BIG_ENDIAN))
part = !part;
val = part ? CONST_DOUBLE_HIGH (op) : CONST_DOUBLE_LOW (op);
offset %= HOST_BITS_PER_WIDE_INT;
innermode = mode_for_size (HOST_BITS_PER_WIDE_INT, MODE_INT, 0);
case CONST_INT:
if (GET_CODE (op) == CONST_INT)
val = INTVAL (op);
if (GET_MODE_CLASS (outermode) != MODE_INT)
return NULL_RTX;
if (BYTES_BIG_ENDIAN || WORDS_BIG_ENDIAN)
{
if (WORDS_BIG_ENDIAN)
offset = (GET_MODE_BITSIZE (innermode)
- GET_MODE_BITSIZE (outermode) - offset);
if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN
&& GET_MODE_SIZE (outermode) < UNITS_PER_WORD)
offset = (offset + BITS_PER_WORD - GET_MODE_BITSIZE (outermode)
- 2 * (offset % BITS_PER_WORD));
}
if (offset >= HOST_BITS_PER_WIDE_INT)
return ((HOST_WIDE_INT) val < 0) ? constm1_rtx : const0_rtx;
else
{
val >>= offset;
if (GET_MODE_BITSIZE (outermode) < HOST_BITS_PER_WIDE_INT)
val = trunc_int_for_mode (val, outermode);
return GEN_INT (val);
}
default:
break;
}
}
if (GET_CODE (op) == SUBREG)
{
enum machine_mode innermostmode = GET_MODE (SUBREG_REG (op));
int final_offset = byte + SUBREG_BYTE (op);
rtx new;
if (outermode == innermostmode
&& byte == 0 && SUBREG_BYTE (op) == 0)
return SUBREG_REG (op);
if (byte == 0 && GET_MODE_SIZE (innermode) < GET_MODE_SIZE (outermode))
{
int difference = (GET_MODE_SIZE (innermode) - GET_MODE_SIZE (outermode));
if (WORDS_BIG_ENDIAN)
final_offset += (difference / UNITS_PER_WORD) * UNITS_PER_WORD;
if (BYTES_BIG_ENDIAN)
final_offset += difference % UNITS_PER_WORD;
}
if (SUBREG_BYTE (op) == 0
&& GET_MODE_SIZE (innermostmode) < GET_MODE_SIZE (innermode))
{
int difference = (GET_MODE_SIZE (innermostmode) - GET_MODE_SIZE (innermode));
if (WORDS_BIG_ENDIAN)
final_offset += (difference / UNITS_PER_WORD) * UNITS_PER_WORD;
if (BYTES_BIG_ENDIAN)
final_offset += difference % UNITS_PER_WORD;
}
if (GET_MODE_SIZE (innermostmode) > GET_MODE_SIZE (outermode))
{
if (final_offset < 0)
return NULL_RTX;
if (final_offset % GET_MODE_SIZE (outermode)
|| (unsigned) final_offset >= GET_MODE_SIZE (innermostmode))
return NULL_RTX;
}
else
{
int offset = 0;
int difference = (GET_MODE_SIZE (innermostmode) - GET_MODE_SIZE (outermode));
if (WORDS_BIG_ENDIAN)
offset += (difference / UNITS_PER_WORD) * UNITS_PER_WORD;
if (BYTES_BIG_ENDIAN)
offset += difference % UNITS_PER_WORD;
if (offset == final_offset)
final_offset = 0;
else
return NULL_RTX;
}
new = simplify_subreg (outermode, SUBREG_REG (op),
GET_MODE (SUBREG_REG (op)),
final_offset);
if (new)
return new;
return gen_rtx_SUBREG (outermode, SUBREG_REG (op), final_offset);
}
if (REG_P (op)
&& (! REG_FUNCTION_VALUE_P (op)
|| ! rtx_equal_function_value_matters)
&& REGNO (op) < FIRST_PSEUDO_REGISTER
#ifdef CANNOT_CHANGE_MODE_CLASS
&& ! (REG_CANNOT_CHANGE_MODE_P (REGNO (op), innermode, outermode)
&& GET_MODE_CLASS (innermode) != MODE_COMPLEX_INT
&& GET_MODE_CLASS (innermode) != MODE_COMPLEX_FLOAT)
#endif
&& ((reload_completed && !frame_pointer_needed)
|| (REGNO (op) != FRAME_POINTER_REGNUM
#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& REGNO (op) != HARD_FRAME_POINTER_REGNUM
#endif
))
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& REGNO (op) != ARG_POINTER_REGNUM
#endif
&& REGNO (op) != STACK_POINTER_REGNUM)
{
int final_regno = subreg_hard_regno (gen_rtx_SUBREG (outermode, op, byte),
0);
if (HARD_REGNO_MODE_OK (final_regno, outermode)
|| ! HARD_REGNO_MODE_OK (REGNO (op), innermode))
{
rtx x = gen_rtx_REG (outermode, final_regno);
if (subreg_lowpart_offset (outermode, innermode) == byte)
ORIGINAL_REGNO (x) = ORIGINAL_REGNO (op);
return x;
}
}
if (GET_CODE (op) == MEM
&& ! mode_dependent_address_p (XEXP (op, 0))
&& (! MEM_VOLATILE_P (op)
|| ! have_insn_for (SET, innermode))
&& GET_MODE_SIZE (outermode) <= GET_MODE_SIZE (GET_MODE (op)))
return adjust_address_nv (op, outermode, byte);
if (GET_CODE (op) == CONCAT)
{
int is_realpart = byte < GET_MODE_UNIT_SIZE (innermode);
rtx part = is_realpart ? XEXP (op, 0) : XEXP (op, 1);
unsigned int final_offset;
rtx res;
final_offset = byte % (GET_MODE_UNIT_SIZE (innermode));
res = simplify_subreg (outermode, part, GET_MODE (part), final_offset);
if (res)
return res;
return gen_rtx_SUBREG (outermode, part, final_offset);
}
return NULL_RTX;
}
rtx
simplify_gen_subreg (outermode, op, innermode, byte)
rtx op;
unsigned int byte;
enum machine_mode outermode, innermode;
{
rtx new;
if (innermode == VOIDmode || outermode == VOIDmode
|| innermode == BLKmode || outermode == BLKmode)
abort ();
if (GET_MODE (op) != innermode
&& GET_MODE (op) != VOIDmode)
abort ();
if (byte % GET_MODE_SIZE (outermode)
|| byte >= GET_MODE_SIZE (innermode))
abort ();
if (GET_CODE (op) == QUEUED)
return NULL_RTX;
new = simplify_subreg (outermode, op, innermode, byte);
if (new)
return new;
if (GET_CODE (op) == SUBREG || GET_MODE (op) == VOIDmode)
return NULL_RTX;
return gen_rtx_SUBREG (outermode, op, byte);
}
rtx
simplify_rtx (x)
rtx x;
{
enum rtx_code code = GET_CODE (x);
enum machine_mode mode = GET_MODE (x);
switch (GET_RTX_CLASS (code))
{
case '1':
return simplify_unary_operation (code, mode,
XEXP (x, 0), GET_MODE (XEXP (x, 0)));
case 'c':
if (swap_commutative_operands_p (XEXP (x, 0), XEXP (x, 1)))
{
rtx tem;
tem = XEXP (x, 0);
XEXP (x, 0) = XEXP (x, 1);
XEXP (x, 1) = tem;
return simplify_binary_operation (code, mode,
XEXP (x, 0), XEXP (x, 1));
}
case '2':
return simplify_binary_operation (code, mode, XEXP (x, 0), XEXP (x, 1));
case '3':
case 'b':
return simplify_ternary_operation (code, mode, GET_MODE (XEXP (x, 0)),
XEXP (x, 0), XEXP (x, 1),
XEXP (x, 2));
case '<':
return simplify_relational_operation (code,
((GET_MODE (XEXP (x, 0))
!= VOIDmode)
? GET_MODE (XEXP (x, 0))
: GET_MODE (XEXP (x, 1))),
XEXP (x, 0), XEXP (x, 1));
case 'x':
if (code == SUBREG)
return simplify_gen_subreg (mode, SUBREG_REG (x),
GET_MODE (SUBREG_REG (x)),
SUBREG_BYTE (x));
return NULL;
default:
return NULL;
}
}