(IMake _typ (StructMake1 val)) => (IMake _typ val)
(StructSelect [0] (IData x)) => (IData x)

(StructSelect (StructMake1 x)) => x
(StructSelect [0] (StructMake2 x _)) => x
(StructSelect [1] (StructMake2 _ x)) => x
(StructSelect [0] (StructMake3 x _ _)) => x
(StructSelect [1] (StructMake3 _ x _)) => x
(StructSelect [2] (StructMake3 _ _ x)) => x
(StructSelect [0] (StructMake4 x _ _ _)) => x
(StructSelect [1] (StructMake4 _ x _ _)) => x

func rewriteValuedec_OpStructSelect(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	// match: (StructSelect [0] (IData x))
	// result: (IData x)
	for {
		if auxIntToInt64(v.AuxInt) != 0 || v_0.Op != OpIData {
			break
		}
		x := v_0.Args[0]
		v.reset(OpIData)
		v.AddArg(x)
		return true
	}
	// match: (StructSelect (StructMake1 x))
	// result: x
	for {
		if v_0.Op != OpStructMake1 {
			break
		}

// struct operations
(StructSelect (StructMake1 x)) => x
(StructSelect [0] (StructMake2 x _)) => x
(StructSelect [1] (StructMake2 _ x)) => x
(StructSelect [0] (StructMake3 x _ _)) => x
(StructSelect [1] (StructMake3 _ x _)) => x
(StructSelect [2] (StructMake3 _ _ x)) => x
(StructSelect [0] (StructMake4 x _ _ _)) => x
(StructSelect [1] (StructMake4 _ x _ _)) => x
(StructSelect [2] (StructMake4 _ _ x _)) => x

	{name: "StructMake3", argLength: 3},                // arg0..2=field0..2.  Returns struct.
	{name: "StructMake4", argLength: 4},                // arg0..3=field0..3.  Returns struct.
	{name: "StructSelect", argLength: 1, aux: "Int64"}, // arg0=struct, auxint=field index.  Returns the auxint'th field.

	// Arrays
	{name: "ArrayMake0"},                              // Returns array with 0 elements

}
func rewriteValuegeneric_OpStructSelect(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	// match: (StructSelect (StructMake1 x))
	// result: x
	for {
		if v_0.Op != OpStructMake1 {
			break
		}
		x := v_0.Args[0]
		v.copyOf(x)
		return true
	}
	// match: (StructSelect [0] (StructMake2 x _))
	// result: x
	for {
		if auxIntToInt64(v.AuxInt) != 0 || v_0.Op != OpStructMake2 {

	},
	{
		name:    "StructMake3",
		argLen:  3,
		generic: true,
	},
	{
		name:    "StructMake4",
		argLen:  4,
		generic: true,
	},
	{
		name:    "StructSelect",
		auxType: auxInt64,
		argLen:  1,
		generic: true,
	},
	{
		name:    "ArrayMake0",
		argLen:  0,
		generic: true,
	},
	{
		name:    "ArrayMake1",