fn:         fn,
		f:          f,
		vars:       vars,
		idx:        idx,
		stkptrsize: stkptrsize,
	}

	// Significant sources of allocation are kept in the ssa.Cache
	// and reused. Surprisingly, the bit vectors themselves aren't
	// a major source of allocation, but the liveness maps are.
	if lc, _ := f.Cache.Liveness.(*livenessFuncCache); lc == nil {
		// Prep the cache so liveness can fill it later.

	Count   uint8
}

type HDDriveID struct {
	Config         uint16
	Cyls           uint16
	Reserved2      uint16
	Heads          uint16
	Track_bytes    uint16
	Sector_bytes   uint16
	Sectors        uint16
	Vendor0        uint16
	Vendor1        uint16
	Vendor2        uint16
	Serial_no      [20]uint8
	Buf_type       uint16
	Buf_size       uint16
	Ecc_bytes      uint16