If("bool1", "b1", "b2")),
		Bloc("b1",
			Valu("ptr1", OpAddr, ptrType, 0, nil, "sb"),
			Goto("checkPtr")),
		Bloc("b2",
			Valu("ptr2", OpAddr, ptrType, 0, nil, "sb"),
			Goto("checkPtr")),
		// both ptr1 and ptr2 are guaranteed non-nil here
		Bloc("checkPtr",
			Valu("phi", OpPhi, ptrType, 0, nil, "ptr1", "ptr2"),
			Valu("bool2", OpIsNonNil, c.config.Types.Bool, 0, nil, "phi"),

	}
}

func decomposeStringPhi(v *Value) {
	types := &v.Block.Func.Config.Types
	ptrType := types.BytePtr
	lenType := types.Int

	ptr := v.Block.NewValue0(v.Pos, OpPhi, ptrType)
	len := v.Block.NewValue0(v.Pos, OpPhi, lenType)
	for _, a := range v.Args {
		ptr.AddArg(a.Block.NewValue1(v.Pos, OpStringPtr, ptrType, a))
		len.AddArg(a.Block.NewValue1(v.Pos, OpStringLen, lenType, a))
	}
	v.reset(OpStringMake)

	arg  unsafe.Pointer // ptr to object (may be a heap pointer)
	nret uintptr        // bytes of return values from fn
	fint *_type         // type of first argument of fn
	ot   *ptrtype       // type of ptr to object (may be a heap pointer)
}

var finalizer1 = [...]byte{
	// Each Finalizer is 5 words, ptr ptr INT ptr ptr (INT = uintptr here)
	// Each byte describes 8 words.

type maptype = abi.MapType

type arraytype = abi.ArrayType

type chantype = abi.ChanType

type slicetype = abi.SliceType

type functype = abi.FuncType

type ptrtype = abi.PtrType

type name = abi.Name

type structtype = abi.StructType

func pkgPath(n name) string {
	if n.Bytes == nil || *n.Data(0)&(1<<2) == 0 {
		return ""
	}
	i, l := n.ReadVarint(1)

// A VoidType represents the C void type.
type VoidType struct {
	CommonType
}

func (t *VoidType) String() string { return "void" }

// A PtrType represents a pointer type.
type PtrType struct {
	CommonType
	Type Type
}

func (t *PtrType) String() string { return "*" + t.Type.String() }

// A StructType represents a struct, union, or C++ class type.
type StructType struct {
	CommonType

	return c, d
}

func (f *Func) SplitSlice(name *LocalSlot) (*LocalSlot, *LocalSlot, *LocalSlot) {
	ptrType := types.NewPtr(name.Type.Elem())
	lenType := types.Types[types.TINT]
	p := f.SplitSlot(name, ".ptr", 0, ptrType)
	l := f.SplitSlot(name, ".len", ptrType.Size(), lenType)
	c := f.SplitSlot(name, ".cap", ptrType.Size()+lenType.Size(), lenType)
	return p, l, c
}

type arrayType = abi.ArrayType

// chanType represents a channel type.
type chanType = abi.ChanType

type funcType = abi.FuncType

type interfaceType = abi.InterfaceType

// ptrType represents a pointer type.
type ptrType = abi.PtrType

// sliceType represents a slice type.
type sliceType = abi.SliceType

// structType represents a struct type.
type structType = abi.StructType

	if t.TFlag&TFlagUncommon == 0 {
		return nil
	}
	switch t.Kind() {
	case Struct:
		return &(*structTypeUncommon)(unsafe.Pointer(t)).u
	case Pointer:
		type u struct {
			PtrType
			u UncommonType
		}
		return &(*u)(unsafe.Pointer(t)).u
	case Func:
		type u struct {
			FuncType
			u UncommonType
		}
		return &(*u)(unsafe.Pointer(t)).u
	case Slice:
		type u struct {

func dumpotherroot(description string, to unsafe.Pointer) {
	dumpint(tagOtherRoot)
	dumpstr(description)
	dumpint(uint64(uintptr(to)))
}

func dumpfinalizer(obj unsafe.Pointer, fn *funcval, fint *_type, ot *ptrtype) {
	dumpint(tagFinalizer)
	dumpint(uint64(uintptr(obj)))
	dumpint(uint64(uintptr(unsafe.Pointer(fn))))
	dumpint(uint64(uintptr(unsafe.Pointer(fn.fn))))
	dumpint(uint64(uintptr(unsafe.Pointer(fint))))

func arena_arena_New(arena unsafe.Pointer, typ any) any {
	t := (*_type)(efaceOf(&typ).data)
	if t.Kind_&abi.KindMask != abi.Pointer {
		throw("arena_New: non-pointer type")
	}
	te := (*ptrtype)(unsafe.Pointer(t)).Elem
	x := ((*userArena)(arena)).new(te)
	var result any
	e := efaceOf(&result)
	e._type = t
	e.data = x
	return result
}