br_status bool_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * const * args, expr_ref & result) { SASSERT(f->get_family_id() == m().get_basic_family_id()); switch (f->get_decl_kind()) { case OP_EQ: case OP_IFF: SASSERT(num_args == 2); return mk_eq_core(args[0], args[1], result); case OP_DISTINCT: return mk_distinct_core(num_args, args, result); case OP_AND: return mk_and_core(num_args, args, result); case OP_OR: return mk_or_core(num_args, args, result); case OP_NOT: SASSERT(num_args == 1); return mk_not_core(args[0], result); case OP_ITE: SASSERT(num_args == 3); return mk_ite_core(args[0], args[1], args[2], result); case OP_IMPLIES: SASSERT(num_args == 2); mk_implies(args[0], args[1], result); return BR_DONE; case OP_XOR: SASSERT(num_args == 2); mk_xor(args[0], args[1], result); return BR_DONE; default: return BR_FAILED; } }
bool basic_simplifier_plugin::reduce(func_decl * f, unsigned num_args, expr * const * args, expr_ref & result) { set_reduce_invoked(); SASSERT(f->get_family_id() == m_manager.get_basic_family_id()); basic_op_kind k = static_cast<basic_op_kind>(f->get_decl_kind()); switch (k) { case OP_FALSE: case OP_TRUE: return false; case OP_EQ: SASSERT(num_args == 2); mk_eq(args[0], args[1], result); return true; case OP_DISTINCT: mk_distinct(num_args, args, result); return true; case OP_ITE: SASSERT(num_args == 3); mk_ite(args[0], args[1], args[2], result); return true; case OP_AND: mk_and(num_args, args, result); return true; case OP_OR: mk_or(num_args, args, result); return true; case OP_IMPLIES: mk_implies(args[0], args[1], result); return true; case OP_IFF: mk_iff(args[0], args[1], result); return true; case OP_XOR: mk_xor(args[0], args[1], result); return true; case OP_NOT: SASSERT(num_args == 1); mk_not(args[0], result); return true; default: UNREACHABLE(); return false; } }
void mk_xor3(expr * a, expr * b, expr * c, expr_ref & r) { expr_ref tmp(m()); mk_xor(b, c, tmp); mk_xor(a, tmp, r); }