g(collect)
	return pats
}

// A generator is a function that calls its argument with the strings that it
// generates.
type generator func(collect func(string))

// genConst generates a single constant string.
func genConst(s string) generator {
	return func(collect func(string)) {
		collect(s)
	}
}

// genChoice generates all the strings in its argument.
func genChoice(choices []string) generator {

(SGTconst [c] (MOVBUreg _)) && 0xff < c => (MOVVconst [1])
(SGTconst [c] (MOVBUreg _)) && c < 0 => (MOVVconst [0])
(SGTUconst [c] (MOVBUreg _)) && 0xff < uint64(c) => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && 0x7fff < c => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && c <= -0x8000 => (MOVVconst [0])
(SGTconst [c] (MOVHUreg _)) && 0xffff < c => (MOVVconst [1])
(SGTconst [c] (MOVHUreg _)) && c < 0 => (MOVVconst [0])

(SGTconst [c] (MOVBUreg _)) && 0xff < c => (MOVVconst [1])
(SGTconst [c] (MOVBUreg _)) && c < 0 => (MOVVconst [0])
(SGTUconst [c] (MOVBUreg _)) && 0xff < uint64(c) => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && 0x7fff < c => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && c <= -0x8000 => (MOVVconst [0])
(SGTconst [c] (MOVHUreg _)) && 0xffff < c => (MOVVconst [1])
(SGTconst [c] (MOVHUreg _)) && c < 0 => (MOVVconst [0])

	// )
	if expr != "" {
		buf.WriteByte(')')
	}

	return buf.String()
}

func (x *operand) String() string {
	return operandString(x, nil)
}

// setConst sets x to the untyped constant for literal lit.
func (x *operand) setConst(k token.Token, lit string) {
	var kind BasicKind
	switch k {
	case token.INT:
		kind = UntypedInt
	case token.FLOAT:
		kind = UntypedFloat
	case token.IMAG:

	// )
	if expr != "" {
		buf.WriteByte(')')
	}

	return buf.String()
}

func (x *operand) String() string {
	return operandString(x, nil)
}

// setConst sets x to the untyped constant for literal lit.
func (x *operand) setConst(k syntax.LitKind, lit string) {
	var kind BasicKind
	switch k {
	case syntax.IntLit:
		kind = UntypedInt
	case syntax.FloatLit:
		kind = UntypedFloat

      const bool use_const = entry.second;
      const string camel_case_name = ToCamelCase(api_def_attr.rename_to());
      const string suffix =
          (camel_case_name == op_info.op_name || camel_case_name == "Attrs")
              ? "_"
              : "";
      const string attr_func_def = strings::StrCat(
          camel_case_name, suffix, "(", use_const ? "const " : "",

	v_0 := v.Args[0]
	// match: (SLLconst [c] (MOVDconst [d]))
	// result: (MOVDconst [d<<uint64(c)])
	for {
		c := auxIntToInt64(v.AuxInt)
		if v_0.Op != OpARM64MOVDconst {
			break
		}
		d := auxIntToInt64(v_0.AuxInt)
		v.reset(OpARM64MOVDconst)
		v.AuxInt = int64ToAuxInt(d << uint64(c))
		return true
	}
	// match: (SLLconst [c] (SRLconst [c] x))
	// cond: 0 < c && c < 64

	//
	//  res := lattice{constant, nil}
	// 	switch op {
	// 	case OpAdd16:
	//		res.val = newConst(argLt1.val.AuxInt16() + argLt2.val.AuxInt16())
	// 	case OpAdd32:
	// 		res.val = newConst(argLt1.val.AuxInt32() + argLt2.val.AuxInt32())
	//	case OpDiv8:
	//		if !isDivideByZero(argLt2.val.AuxInt8()) {
	//			res.val = newConst(argLt1.val.AuxInt8() / argLt2.val.AuxInt8())
	//		}
	//  ...
	// 	}
	//

                                                        compressed_data);
        auto s_qconst =
            builder.create<SparseQConstOp>(op->getLoc(), cst.getQtypeAttr(),
                                           cst.getValue(), s_param, new_value);
        value.replaceAllUsesWith(s_qconst.getResult());
        cst.erase();
      }

      if (result.needs_densify) {

	{"false", UntypedBool, constant.MakeBool(false)},
	{"iota", UntypedInt, constant.MakeInt64(0)},
}

func defPredeclaredConsts() {
	for _, c := range predeclaredConsts {
		def(NewConst(nopos, nil, c.name, Typ[c.kind], c.val))
	}
}

func defPredeclaredNil() {
	def(&Nil{object{name: "nil", typ: Typ[UntypedNil], color_: black}})
}

// A builtinId is the id of a builtin function.