Function parse_fcmp

tools/alive_parser.cpp:1050–1092

}

static unique_ptr<Instr> parse_fcmp(string_view name) {
  // fcmp cond ty %a, &b
  FCmp::Cond cond = FCmp::OEQ;
  auto cond_t = *tokenizer;
  switch (cond_t) {
  case OEQ:   cond = FCmp::OEQ; break;
  case OGT:   cond = FCmp::OGT; break;
  case OGE:   cond = FCmp::OGE; break;
  case OLT:   cond = FCmp::OLT; break;
  case OLE:   cond = FCmp::OLE; break;
  case ONE:   cond = FCmp::ONE; break;
  case ORD:   cond = FCmp::ORD; break;
  case UEQ:   cond = FCmp::UEQ; break;
  case UGT:   cond = FCmp::UGT; break;
  case UGE:   cond = FCmp::UGE; break;
  case ULT:   cond = FCmp::ULT; break;
  case ULE:   cond = FCmp::ULE; break;
  case UNE:   cond = FCmp::UNE; break;
  case UNO:   cond = FCmp::UNO; break;
  case TRUE:                    break;
  case FALSE:                   break;
  default:
    error("Expected fcmp cond", cond_t);
  }

  auto &ty = parse_type();
  auto &a = parse_operand(ty);
  parse_comma();
  auto &b = parse_operand(ty);
  auto &bool_ty = *int_types[1].get();

  switch (cond_t) {
  case TRUE:
  case FALSE:
    return make_unique<UnaryOp>(bool_ty, string(name),
                                get_constant(cond_t == TRUE, bool_ty),
                                UnaryOp::Copy);
  default:
    return make_unique<FCmp>(bool_ty, string(name), cond, a, b,
                             parse_fast_math(FCMP), FpExceptionMode(), false);
  }
  UNREACHABLE();
}

static unique_ptr<Instr> parse_freeze(string_view name) {
  // freeze ty %op