}

type partsByVarOffset struct {
	slotIDs []SlotID
	slots   []LocalSlot
}

func (a partsByVarOffset) Len() int { return len(a.slotIDs) }
func (a partsByVarOffset) Less(i, j int) bool {
	return varOffset(a.slots[a.slotIDs[i]]) < varOffset(a.slots[a.slotIDs[j]])
}
func (a partsByVarOffset) Swap(i, j int) { a.slotIDs[i], a.slotIDs[j] = a.slotIDs[j], a.slotIDs[i] }

	// Loop backward through sa, always tracking
	// the next index to populate from sa[:numLMS].
	// When we get to one, populate it.
	// Zero the rest of the slots; they have dead values in them.
	x := numLMS - 1
	saX := sa[x]
	c := text[saX]
	b := bucket[c] - 1
	bucket[c] = b

	for i := len(sa) - 1; i >= 0; i-- {
		if i != int(b) {
			sa[i] = 0

//	   Scan the mspan's free bitmap to find a free slot.
//	   If there is a free slot, allocate it.
//	   This can all be done without acquiring a lock.
//
//	2. If the mspan has no free slots, obtain a new mspan
//	   from the mcentral's list of mspans of the required size
//	   class that have free space.
//	   Obtaining a whole span amortizes the cost of locking
//	   the mcentral.
//

  //        variables are removed from the loop variabled during
  //        canonicalizationW, we need to create new operand/result slots. The
  //        input operands for these slots are the read values
  //        prior to the op, and all references to these are replaced by the
  //        corresponding slot argument. We need to generate writes following

	// excludes these objects (and hence only goes up between GCs).
	//
	// To reduce contention, this is updated only when obtaining a span
	// from an mcentral and at this point it counts all of the unallocated
	// slots in that span (which will be allocated before that mcache
	// obtains another span from that mcentral). Hence, it slightly
	// overestimates the "true" live heap size. It's better to overestimate

		m.mask = 1
	} else {
		m.mask = m.mask << 1
	}
	m.index++
}

// clobberdeadPtr is a special value that is used by the compiler to
// clobber dead stack slots, when -clobberdead flag is set.
const clobberdeadPtr = uintptr(0xdeaddead | 0xdeaddead<<((^uintptr(0)>>63)*32))

// badPointer throws bad pointer in heap panic.
func badPointer(s *mspan, p, refBase, refOff uintptr) {

					// any safepoint. Just use a type big enough to hold any register.
					t := LocalSlot{N: e.s.f.NewLocal(c.Pos, types.Int64), Type: types.Int64}
					// TODO: reuse these slots. They'll need to be erased first.
					e.set(t, vid, x, false, c.Pos)
					if e.s.f.pass.debug > regDebug {
						fmt.Printf("  SPILL %s->%s %s\n", r, t, x.LongString())
					}
				}

		// since we may have stopped while this function was
		// setting up a call.
		//
		// TODO: We could narrow this down if the compiler
		// produced a single map per function of stack slots
		// and registers that ever contain a pointer.
		if frame.varp != 0 {
			size := frame.varp - frame.sp
			if size > 0 {
				scanConservative(frame.sp, size, nil, gcw, state)
			}
		}

	if p == nil {
		return
	}

	liveInfo := funcdata(f, abi.FUNCDATA_ArgLiveInfo)
	liveIdx := pcdatavalue(f, abi.PCDATA_ArgLiveIndex, pc)
	startOffset := uint8(0xff) // smallest offset that needs liveness info (slots with a lower offset is always live)
	if liveInfo != nil {
		startOffset = *(*uint8)(liveInfo)
	}

	isLive := func(off, slotIdx uint8) bool {
		if liveInfo == nil || liveIdx <= 0 {

		// any situation where a pointer is suspect.
		s.state.set(mSpanInUse)
	}

	// Publish the span in various locations.

	// This is safe to call without the lock held because the slots
	// related to this span will only ever be read or modified by
	// this thread until pointers into the span are published (and
	// we execute a publication barrier at the end of this function