int64Val             int64
	uintVal              uint
	uint8Val             uint8
	uint16Val            uint16
	uint32Val            uint32
	uint64Val            uint64
	uintptrVal           uintptr
	float32Val           float32
	float64Val           float64
	stringVal            string
	bytesVal             []byte
	runeVal              rune
	complex64Val         complex64
	complex128Val        complex128

	"unicode"

	"cmd/compile/internal/base"
	"cmd/compile/internal/ir"
	"cmd/compile/internal/types"
)

func roundFloat(v constant.Value, sz int64) constant.Value {
	switch sz {
	case 4:
		f, _ := constant.Float32Val(v)
		return makeFloat64(float64(f))
	case 8:
		f, _ := constant.Float64Val(v)
		return makeFloat64(f)
	}
	base.Fatalf("unexpected size: %v", sz)
	panic("unreachable")
}

	case intVal:
		return x.val.Uint64(), x.val.IsUint64()
	case unknownVal:
		return 0, false
	default:
		panic(fmt.Sprintf("%v not an Int", x))
	}
}

// Float32Val is like [Float64Val] but for float32 instead of float64.
func Float32Val(x Value) (float32, bool) {
	switch x := x.(type) {
	case int64Val:
		f := float32(x)
		return f, int64Val(f) == x
	case intVal:
		f, acc := newFloat().SetInt(x.val).Float32()