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Therefore unless - * arg2 is constant, we can't infer anything from it. - */ - if (ti_is_const(t2)) { - uint64_t v2 =3D ti_const_val(t2); - if (fold_affected_mask(ctx, op, z_mask & v2)) { - return true; - } - z_mask &=3D ~v2; + /* Affected bits are those not known zero, masked by those known zero.= */ + if (fold_affected_mask(ctx, op, t1->z_mask & t2->z_mask)) { + return true; } =20 + z_mask =3D t1->z_mask & ~t2->o_mask; + o_mask =3D t1->o_mask & ~t2->z_mask; s_mask =3D t1->s_mask & t2->s_mask; - return fold_masks_zs(ctx, op, z_mask, s_mask); + + return fold_masks_zos(ctx, op, z_mask, o_mask, s_mask); } =20 static bool fold_bitsel_vec(OptContext *ctx, TCGOp *op) --=20 2.43.0