Kaoru FUZITA <******@****.***> 1449710642 +0900

				nre = new(Regexp)
				*nre = *re
				nre.Rune = nil
				nre.Sub = append(nre.Sub0[:0], re.Sub[:i]...)
			}
			if nre != re {
				nre.Sub = append(nre.Sub, nsub)
			}
		}
		return nre

	case OpStar, OpPlus, OpQuest:
		sub := re.Sub[0].Simplify()
		return simplify1(re.Op, re.Flags, sub, re)

	case OpRepeat:
		// Special special case: x{0} matches the empty string
		// and doesn't even need to consider x.

			Valu("store1", OpStore, types.TypeMem, 0, c.config.Types.Bool, "addr1", "v", "zero1"),
			Valu("store2", OpStore, types.TypeMem, 0, c.config.Types.Bool, "addr2", "v", "store1"),
			Valu("store3", OpStore, types.TypeMem, 0, c.config.Types.Bool, "addr1", "v", "store2"),
			Valu("store4", OpStore, types.TypeMem, 0, c.config.Types.Bool, "addr3", "v", "store3"),
			Goto("exit")),

	if err != nil {
		t.Fatal(err)
	}

	var operr error
	err = wconn.Write(func(s uintptr) bool {
		_, operr = syscall.Write(syscallDescriptor(s), []byte{'b'})
		return operr != syscall.EAGAIN
	})
	if err != nil {
		t.Fatal(err)
	}
	if operr != nil {
		t.Fatal(err)
	}

	var n int
	buf := make([]byte, 1)
	err = rconn.Read(func(s uintptr) bool {
		n, operr = syscall.Read(syscallDescriptor(s), buf)

		buf.WriteString(arg.String())
	}
	return buf.String()
}

// An Op is an instruction operation.
type Op uint16

func (o Op) String() string {
	if int(o) >= len(opstr) || opstr[o] == "" {
		return fmt.Sprintf("Op(%d)", int(o))
	}
	return opstr[o]
}

// An Arg is a single instruction argument, one of these types: Reg, CondReg, SpReg, Imm, PCRel, Label, or Offset.
type Arg interface {
	IsArg()
	String() string
}

	// Operations related URLs for istio.io
	// #####################################

	// OpsURL is a base URL for operations related docs
	OpsURL = fmt.Sprintf("%s%s", DocsURL, "ops/")

	// DeploymentRequirements should generate
	// https://istio.io/v1.7/docs/ops/deployment/requirements/
	DeploymentRequirements = fmt.Sprintf("%s%s", OpsURL, "deployment/requirements/")

	// ProtocolSelection should generate

	_ = x[OpAnyChar-6]
	_ = x[OpBeginLine-7]
	_ = x[OpEndLine-8]
	_ = x[OpBeginText-9]
	_ = x[OpEndText-10]
	_ = x[OpWordBoundary-11]
	_ = x[OpNoWordBoundary-12]
	_ = x[OpCapture-13]
	_ = x[OpStar-14]
	_ = x[OpPlus-15]
	_ = x[OpQuest-16]
	_ = x[OpRepeat-17]
	_ = x[OpConcat-18]
	_ = x[OpAlternate-19]
	_ = x[opPseudo-128]
}

const (

			Valu("sp", OpSP, c.config.Types.Uintptr, 0, nil),
			Valu("v", OpConstNil, ptrType, 0, nil),
			Valu("addr1", OpAddr, ptrType, 0, nil, "sb"),
			Valu("wb2", OpStore, types.TypeMem, 0, ptrType, "addr1", "v", "wb1"),
			Valu("wb1", OpStore, types.TypeMem, 0, ptrType, "addr1", "v", "start"), // wb1 and wb2 are out of order
			Goto("exit")),
		Bloc("exit",
			Exit("wb2")))

	CheckFunc(fun.f)
	writebarrier(fun.f)

// are not a dense packing from 0 to N, although the
// density is high, probably at least 90%.

func (op Op) String() string {
	if op >= Op(len(opstr)) || opstr[op] == "" {
		return fmt.Sprintf("Op(%d)", int(op))
	}
	return opstr[op]
}

// An Inst is a single instruction.
type Inst struct {
	Op   Op     // Opcode mnemonic
	Enc  uint32 // Raw encoding bits.

				valn("store", i-1, 4)),
			Valu(valn("store", i, 1), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 1),
				valn("v", i, 0), valn("zero", i, 1)),
			Valu(valn("store", i, 2), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 2),
				valn("v", i, 0), valn("store", i, 1)),
			Valu(valn("store", i, 3), OpStore, types.TypeMem, 0, elemType, valn("addr", i, 1),
				valn("v", i, 0), valn("store", i, 2)),