static unsigned HOST_WIDE_INT nonzero_bits1 (const_rtx, scalar_int_mode,
const_rtx, machine_mode,
unsigned HOST_WIDE_INT);
-static unsigned int cached_num_sign_bit_copies (const_rtx, machine_mode, const_rtx,
- machine_mode,
+static unsigned int cached_num_sign_bit_copies (const_rtx, scalar_int_mode,
+ const_rtx, machine_mode,
unsigned int);
-static unsigned int num_sign_bit_copies1 (const_rtx, machine_mode, const_rtx,
- machine_mode, unsigned int);
+static unsigned int num_sign_bit_copies1 (const_rtx, scalar_int_mode,
+ const_rtx, machine_mode,
+ unsigned int);
rtx_subrtx_bound_info rtx_all_subrtx_bounds[NUM_RTX_CODE];
rtx_subrtx_bound_info rtx_nonconst_subrtx_bounds[NUM_RTX_CODE];
unsigned int
num_sign_bit_copies (const_rtx x, machine_mode mode)
{
- return cached_num_sign_bit_copies (x, mode, NULL_RTX, VOIDmode, 0);
+ if (mode == VOIDmode)
+ mode = GET_MODE (x);
+ scalar_int_mode int_mode;
+ if (!is_a <scalar_int_mode> (mode, &int_mode))
+ return 1;
+ return cached_num_sign_bit_copies (x, int_mode, NULL_RTX, VOIDmode, 0);
}
/* Return true if nonzero_bits1 might recurse into both operands
first or the second level. */
static unsigned int
-cached_num_sign_bit_copies (const_rtx x, machine_mode mode, const_rtx known_x,
- machine_mode known_mode,
+cached_num_sign_bit_copies (const_rtx x, scalar_int_mode mode,
+ const_rtx known_x, machine_mode known_mode,
unsigned int known_ret)
{
if (x == known_x && mode == known_mode)
}
/* Return the number of bits at the high-order end of X that are known to
- be equal to the sign bit. X will be used in mode MODE; if MODE is
- VOIDmode, X will be used in its own mode. The returned value will always
- be between 1 and the number of bits in MODE. */
+ be equal to the sign bit. X will be used in mode MODE. The returned
+ value will always be between 1 and the number of bits in MODE. */
static unsigned int
-num_sign_bit_copies1 (const_rtx x, machine_mode mode, const_rtx known_x,
+num_sign_bit_copies1 (const_rtx x, scalar_int_mode mode, const_rtx known_x,
machine_mode known_mode,
unsigned int known_ret)
{
enum rtx_code code = GET_CODE (x);
- machine_mode inner_mode;
+ unsigned int bitwidth = GET_MODE_PRECISION (mode);
int num0, num1, result;
unsigned HOST_WIDE_INT nonzero;
- /* If we weren't given a mode, use the mode of X. If the mode is still
- VOIDmode, we don't know anything. Likewise if one of the modes is
- floating-point. */
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
+ if (CONST_INT_P (x))
+ {
+ /* If the constant is negative, take its 1's complement and remask.
+ Then see how many zero bits we have. */
+ nonzero = UINTVAL (x) & GET_MODE_MASK (mode);
+ if (bitwidth <= HOST_BITS_PER_WIDE_INT
+ && (nonzero & (HOST_WIDE_INT_1U << (bitwidth - 1))) != 0)
+ nonzero = (~nonzero) & GET_MODE_MASK (mode);
- gcc_checking_assert (mode != BLKmode);
+ return (nonzero == 0 ? bitwidth : bitwidth - floor_log2 (nonzero) - 1);
+ }
- if (mode == VOIDmode || FLOAT_MODE_P (mode) || FLOAT_MODE_P (GET_MODE (x))
- || VECTOR_MODE_P (GET_MODE (x)) || VECTOR_MODE_P (mode))
+ scalar_int_mode xmode, inner_mode;
+ if (!is_a <scalar_int_mode> (GET_MODE (x), &xmode))
return 1;
+ unsigned int xmode_width = GET_MODE_PRECISION (xmode);
+
/* For a smaller mode, just ignore the high bits. */
- unsigned int bitwidth = GET_MODE_PRECISION (mode);
- if (bitwidth < GET_MODE_PRECISION (GET_MODE (x)))
+ if (bitwidth < xmode_width)
{
- num0 = cached_num_sign_bit_copies (x, GET_MODE (x),
+ num0 = cached_num_sign_bit_copies (x, xmode,
known_x, known_mode, known_ret);
- return MAX (1,
- num0 - (int) (GET_MODE_PRECISION (GET_MODE (x)) - bitwidth));
+ return MAX (1, num0 - (int) (xmode_width - bitwidth));
}
- if (GET_MODE (x) != VOIDmode && bitwidth > GET_MODE_PRECISION (GET_MODE (x)))
+ if (bitwidth > xmode_width)
{
/* If this machine does not do all register operations on the entire
register and MODE is wider than the mode of X, we can say nothing
/* Likewise on machines that do, if the mode of the object is smaller
than a word and loads of that size don't sign extend, we can say
nothing about the high order bits. */
- if (GET_MODE_PRECISION (GET_MODE (x)) < BITS_PER_WORD
- && load_extend_op (GET_MODE (x)) != SIGN_EXTEND)
+ if (xmode_width < BITS_PER_WORD
+ && load_extend_op (xmode) != SIGN_EXTEND)
return 1;
}
we can do this only if the target does not support different pointer
or address modes depending on the address space. */
if (target_default_pointer_address_modes_p ()
- && ! POINTERS_EXTEND_UNSIGNED && GET_MODE (x) == Pmode
+ && ! POINTERS_EXTEND_UNSIGNED && xmode == Pmode
&& mode == Pmode && REG_POINTER (x)
&& !targetm.have_ptr_extend ())
return GET_MODE_PRECISION (Pmode) - GET_MODE_PRECISION (ptr_mode) + 1;
case MEM:
/* Some RISC machines sign-extend all loads of smaller than a word. */
- if (load_extend_op (GET_MODE (x)) == SIGN_EXTEND)
- return MAX (1, ((int) bitwidth
- - (int) GET_MODE_PRECISION (GET_MODE (x)) + 1));
+ if (load_extend_op (xmode) == SIGN_EXTEND)
+ return MAX (1, ((int) bitwidth - (int) xmode_width + 1));
break;
- case CONST_INT:
- /* If the constant is negative, take its 1's complement and remask.
- Then see how many zero bits we have. */
- nonzero = UINTVAL (x) & GET_MODE_MASK (mode);
- if (bitwidth <= HOST_BITS_PER_WIDE_INT
- && (nonzero & (HOST_WIDE_INT_1U << (bitwidth - 1))) != 0)
- nonzero = (~nonzero) & GET_MODE_MASK (mode);
-
- return (nonzero == 0 ? bitwidth : bitwidth - floor_log2 (nonzero) - 1);
-
case SUBREG:
/* If this is a SUBREG for a promoted object that is sign-extended
and we are looking at it in a wider mode, we know that at least the
{
num0 = cached_num_sign_bit_copies (SUBREG_REG (x), mode,
known_x, known_mode, known_ret);
- return MAX ((int) bitwidth
- - (int) GET_MODE_PRECISION (GET_MODE (x)) + 1,
- num0);
+ return MAX ((int) bitwidth - (int) xmode_width + 1, num0);
}
- /* For a smaller object, just ignore the high bits. */
- inner_mode = GET_MODE (SUBREG_REG (x));
- if (bitwidth <= GET_MODE_PRECISION (inner_mode))
+ if (is_a <scalar_int_mode> (GET_MODE (SUBREG_REG (x)), &inner_mode))
{
- num0 = cached_num_sign_bit_copies (SUBREG_REG (x), VOIDmode,
- known_x, known_mode, known_ret);
- return
- MAX (1, num0 - (int) (GET_MODE_PRECISION (inner_mode) - bitwidth));
- }
+ /* For a smaller object, just ignore the high bits. */
+ if (bitwidth <= GET_MODE_PRECISION (inner_mode))
+ {
+ num0 = cached_num_sign_bit_copies (SUBREG_REG (x), inner_mode,
+ known_x, known_mode,
+ known_ret);
+ return MAX (1, num0 - (int) (GET_MODE_PRECISION (inner_mode)
+ - bitwidth));
+ }
- /* For paradoxical SUBREGs on machines where all register operations
- affect the entire register, just look inside. Note that we are
- passing MODE to the recursive call, so the number of sign bit copies
- will remain relative to that mode, not the inner mode. */
-
- /* This works only if loads sign extend. Otherwise, if we get a
- reload for the inner part, it may be loaded from the stack, and
- then we lose all sign bit copies that existed before the store
- to the stack. */
-
- if (WORD_REGISTER_OPERATIONS
- && load_extend_op (inner_mode) == SIGN_EXTEND
- && paradoxical_subreg_p (x)
- && (MEM_P (SUBREG_REG (x)) || REG_P (SUBREG_REG (x))))
- return cached_num_sign_bit_copies (SUBREG_REG (x), mode,
- known_x, known_mode, known_ret);
+ /* For paradoxical SUBREGs on machines where all register operations
+ affect the entire register, just look inside. Note that we are
+ passing MODE to the recursive call, so the number of sign bit
+ copies will remain relative to that mode, not the inner mode. */
+
+ /* This works only if loads sign extend. Otherwise, if we get a
+ reload for the inner part, it may be loaded from the stack, and
+ then we lose all sign bit copies that existed before the store
+ to the stack. */
+
+ if (WORD_REGISTER_OPERATIONS
+ && load_extend_op (inner_mode) == SIGN_EXTEND
+ && paradoxical_subreg_p (x)
+ && (MEM_P (SUBREG_REG (x)) || REG_P (SUBREG_REG (x))))
+ return cached_num_sign_bit_copies (SUBREG_REG (x), mode,
+ known_x, known_mode, known_ret);
+ }
break;
case SIGN_EXTRACT:
break;
case SIGN_EXTEND:
- return (bitwidth - GET_MODE_PRECISION (GET_MODE (XEXP (x, 0)))
- + cached_num_sign_bit_copies (XEXP (x, 0), VOIDmode,
- known_x, known_mode, known_ret));
+ if (is_a <scalar_int_mode> (GET_MODE (XEXP (x, 0)), &inner_mode))
+ return (bitwidth - GET_MODE_PRECISION (inner_mode)
+ + cached_num_sign_bit_copies (XEXP (x, 0), inner_mode,
+ known_x, known_mode, known_ret));
+ break;
case TRUNCATE:
/* For a smaller object, just ignore the high bits. */
- num0 = cached_num_sign_bit_copies (XEXP (x, 0), VOIDmode,
+ inner_mode = as_a <scalar_int_mode> (GET_MODE (XEXP (x, 0)));
+ num0 = cached_num_sign_bit_copies (XEXP (x, 0), inner_mode,
known_x, known_mode, known_ret);
- return MAX (1, (num0 - (int) (GET_MODE_PRECISION (GET_MODE (XEXP (x, 0)))
+ return MAX (1, (num0 - (int) (GET_MODE_PRECISION (inner_mode)
- bitwidth)));
case NOT:
known_x, known_mode, known_ret);
if (CONST_INT_P (XEXP (x, 1))
&& INTVAL (XEXP (x, 1)) > 0
- && INTVAL (XEXP (x, 1)) < GET_MODE_PRECISION (GET_MODE (x)))
+ && INTVAL (XEXP (x, 1)) < xmode_width)
num0 = MIN ((int) bitwidth, num0 + INTVAL (XEXP (x, 1)));
return num0;
if (!CONST_INT_P (XEXP (x, 1))
|| INTVAL (XEXP (x, 1)) < 0
|| INTVAL (XEXP (x, 1)) >= (int) bitwidth
- || INTVAL (XEXP (x, 1)) >= GET_MODE_PRECISION (GET_MODE (x)))
+ || INTVAL (XEXP (x, 1)) >= xmode_width)
return 1;
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
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