diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 3ad050f..cfe0f19 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5978,8 +5978,11 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest, GET_MODE_MASK (mode), 0)); /* We can truncate a constant value and return it. */ - if (CONST_INT_P (XEXP (x, 0))) - return gen_int_mode (INTVAL (XEXP (x, 0)), mode); + { + poly_int64 c; + if (poly_int_rtx_p (XEXP (x, 0), &c)) + return gen_int_mode (c, mode); + } /* Similarly to what we do in simplify-rtx.c, a truncate of a register whose value is a comparison can be replaced with a subreg if @@ -8700,6 +8703,7 @@ force_int_to_mode (rtx x, scalar_int_mode mode, scalar_int_mode xmode, int next_select = just_select || code == XOR || code == NOT || code == NEG; unsigned HOST_WIDE_INT fuller_mask; rtx op0, op1, temp; + poly_int64 const_op0; /* When we have an arithmetic operation, or a shift whose count we do not know, we need to assume that all bits up to the highest-order @@ -8823,8 +8827,8 @@ force_int_to_mode (rtx x, scalar_int_mode mode, scalar_int_mode xmode, case MINUS: /* If X is (minus C Y) where C's least set bit is larger than any bit in the mask, then we may replace with (neg Y). */ - if (CONST_INT_P (XEXP (x, 0)) - && least_bit_hwi (UINTVAL (XEXP (x, 0))) > mask) + if (poly_int_rtx_p (XEXP (x, 0), &const_op0) + && (unsigned HOST_WIDE_INT) known_alignment (const_op0) > mask) { x = simplify_gen_unary (NEG, xmode, XEXP (x, 1), xmode); return force_to_mode (x, mode, mask, next_select); |