slmap  map[slotKey]SlKeyIdx
	slkeys []LocalSlot
}

func newSlotCanonicalizer() *slotCanonicalizer {
	return &slotCanonicalizer{
		slmap:  make(map[slotKey]SlKeyIdx),
		slkeys: []LocalSlot{LocalSlot{N: nil}},
	}
}

type SlKeyIdx uint32

const noSlot = SlKeyIdx(0)

// slotKey is a type-insensitive encapsulation of a LocalSlot; it
// is used to key a map within slotCanonicalizer.

			// of narrowing conversions).
			x = e.p.NewValue1(pos, OpStoreReg, loc.(LocalSlot).Type, x)
		}
	} else {
		// Emit move from src to dst.
		_, srcReg := src.(*Register)
		if srcReg {
			if dstReg {
				x = e.p.NewValue1(pos, OpCopy, c.Type, c)
			} else {
				x = e.p.NewValue1(pos, OpStoreReg, loc.(LocalSlot).Type, c)
			}
		} else {
			if dstReg {