diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 43 |
1 files changed, 18 insertions, 25 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 5eeeeda..85a2f50 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -414,13 +414,12 @@ static struct undobuf undobuf; static int n_occurrences; -static rtx reg_nonzero_bits_for_combine (const_rtx, machine_mode, const_rtx, - machine_mode, - unsigned HOST_WIDE_INT, +static rtx reg_nonzero_bits_for_combine (const_rtx, scalar_int_mode, + scalar_int_mode, unsigned HOST_WIDE_INT *); -static rtx reg_num_sign_bit_copies_for_combine (const_rtx, machine_mode, const_rtx, - machine_mode, - unsigned int, unsigned int *); +static rtx reg_num_sign_bit_copies_for_combine (const_rtx, scalar_int_mode, + scalar_int_mode, + unsigned int *); static void do_SUBST (rtx *, rtx); static void do_SUBST_INT (int *, int); static void init_reg_last (void); @@ -10035,17 +10034,15 @@ simplify_and_const_int (rtx x, scalar_int_mode mode, rtx varop, return x; } -/* Given a REG, X, compute which bits in X can be nonzero. +/* Given a REG X of mode XMODE, compute which bits in X can be nonzero. We don't care about bits outside of those defined in MODE. For most X this is simply GET_MODE_MASK (GET_MODE (MODE)), but if X is a shift, AND, or zero_extract, we can do better. */ static rtx -reg_nonzero_bits_for_combine (const_rtx x, machine_mode mode, - const_rtx known_x ATTRIBUTE_UNUSED, - machine_mode known_mode ATTRIBUTE_UNUSED, - unsigned HOST_WIDE_INT known_ret ATTRIBUTE_UNUSED, +reg_nonzero_bits_for_combine (const_rtx x, scalar_int_mode xmode, + scalar_int_mode mode, unsigned HOST_WIDE_INT *nonzero) { rtx tem; @@ -10086,8 +10083,7 @@ reg_nonzero_bits_for_combine (const_rtx x, machine_mode mode, if (tem) { if (SHORT_IMMEDIATES_SIGN_EXTEND) - tem = sign_extend_short_imm (tem, GET_MODE (x), - GET_MODE_PRECISION (mode)); + tem = sign_extend_short_imm (tem, xmode, GET_MODE_PRECISION (mode)); return tem; } @@ -10096,9 +10092,9 @@ reg_nonzero_bits_for_combine (const_rtx x, machine_mode mode, { unsigned HOST_WIDE_INT mask = rsp->nonzero_bits; - if (GET_MODE_PRECISION (GET_MODE (x)) < GET_MODE_PRECISION (mode)) + if (GET_MODE_PRECISION (xmode) < GET_MODE_PRECISION (mode)) /* We don't know anything about the upper bits. */ - mask |= GET_MODE_MASK (mode) ^ GET_MODE_MASK (GET_MODE (x)); + mask |= GET_MODE_MASK (mode) ^ GET_MODE_MASK (xmode); *nonzero &= mask; } @@ -10106,17 +10102,14 @@ reg_nonzero_bits_for_combine (const_rtx x, machine_mode mode, return NULL; } -/* 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. */ +/* Given a reg X of mode XMODE, 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; the returned value will always be between 1 and the + number of bits in MODE. */ static rtx -reg_num_sign_bit_copies_for_combine (const_rtx x, machine_mode mode, - const_rtx known_x ATTRIBUTE_UNUSED, - machine_mode known_mode - ATTRIBUTE_UNUSED, - unsigned int known_ret ATTRIBUTE_UNUSED, +reg_num_sign_bit_copies_for_combine (const_rtx x, scalar_int_mode xmode, + scalar_int_mode mode, unsigned int *result) { rtx tem; @@ -10145,7 +10138,7 @@ reg_num_sign_bit_copies_for_combine (const_rtx x, machine_mode mode, return tem; if (nonzero_sign_valid && rsp->sign_bit_copies != 0 - && GET_MODE_PRECISION (GET_MODE (x)) == GET_MODE_PRECISION (mode)) + && GET_MODE_PRECISION (xmode) == GET_MODE_PRECISION (mode)) *result = rsp->sign_bit_copies; return NULL; |