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nir/uub: improve ior/ixor with constant sources

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Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35514>
This commit is contained in:
Rhys Perry 2025-06-13 11:13:00 +01:00 • committed by Marge Bot
parent ae6ad8977b
commit f3b7ac730c
1 changed files with 10 additions and 2 deletions
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12
src/compiler/nir/nir_range_analysis.c
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@ -1862,9 +1862,17 @@ get_alu_uub(struct analysis_state *state, struct uub_query q, uint32_t *result,
break;
}
case nir_op_ior:
case nir_op_ixor:
*result = bitmask(util_last_bit64(src[0])) | bitmask(util_last_bit64(src[1]));
case nir_op_ixor: {
nir_scalar src0_scalar = nir_scalar_chase_alu_src(q.scalar, 0);
nir_scalar src1_scalar = nir_scalar_chase_alu_src(q.scalar, 1);
if (nir_scalar_is_const(src0_scalar))
*result = bitmask(util_last_bit64(src[1])) | nir_scalar_as_uint(src0_scalar);
else if (nir_scalar_is_const(src1_scalar))
*result = bitmask(util_last_bit64(src[0])) | nir_scalar_as_uint(src1_scalar);
else
*result = bitmask(util_last_bit64(src[0])) | bitmask(util_last_bit64(src[1]));
break;
}
case nir_op_ishl: {
uint32_t src1 = MIN2(src[1], q.scalar.def->bit_size - 1u);
if (util_last_bit64(src[0]) + src1 <= q.scalar.def->bit_size) /* check overflow */