{"panicunsafeslicenilptr", funcTag, 9},
	{"unsafestringcheckptr", funcTag, 122},
	{"panicunsafestringlen", funcTag, 9},
	{"panicunsafestringnilptr", funcTag, 9},
	{"memmove", funcTag, 123},
	{"memclrNoHeapPointers", funcTag, 124},
	{"memclrHasPointers", funcTag, 124},
	{"memequal", funcTag, 125},
	{"memequal0", funcTag, 126},
	{"memequal8", funcTag, 126},
	{"memequal16", funcTag, 126},
	{"memequal32", funcTag, 126},

			k.str = nil
			e := add(unsafe.Pointer(b), dataOffset+abi.MapBucketCount*2*goarch.PtrSize+i*uintptr(t.ValueSize))
			if t.Elem.Pointers() {
				memclrHasPointers(e, t.Elem.Size_)
			} else {
				memclrNoHeapPointers(e, t.Elem.Size_)
			}
			b.tophash[i] = emptyOne
			// If the bucket now ends in a bunch of emptyOne states,
			// change those to emptyRest states.
			if i == abi.MapBucketCount-1 {

If memory is not in a type-safe state, meaning it potentially contains
"garbage" because it was just allocated and it is being initialized
for first use, then it must be *zero-initialized* using
`memclrNoHeapPointers` or non-pointer writes. This does not perform
write barriers.

If memory is already in a type-safe state and is simply being set to
the zero value, this must be done using regular writes, `typedmemclr`,

func mdump(m *MemStats) {
	assertWorldStopped()

	// make sure we're done sweeping
	for _, s := range mheap_.allspans {
		if s.state.get() == mSpanInUse {
			s.ensureSwept()
		}
	}
	memclrNoHeapPointers(unsafe.Pointer(&typecache), unsafe.Sizeof(typecache))
	dwrite(unsafe.Pointer(&dumphdr[0]), uintptr(len(dumphdr)))
	dumpparams()
	dumpitabs()
	dumpobjs()
	dumpgs()
	dumpms()
	dumproots()

	// are always fully cleared when reused.
	h = h.pad(s, typ.Size_-typ.PtrBytes)
	h.flush(s, uintptr(ptr), typ.Size_)

	if typ.Kind_&abi.KindGCProg != 0 {
		// Zero out temporary ptrmask buffer inside object.
		memclrNoHeapPointers(ptr, (gcProgBits+7)/8)
	}

	// Update the PtrBytes value in the type information. After this
	// point, the GC will observe the new bitmap.
	s.largeType.PtrBytes = uintptr(ptr) - base + typ.PtrBytes

	// hn := l2 * sizeof(elem(s))
	hn := typecheck.Conv(ir.NewBinaryExpr(base.Pos, ir.OMUL, l2, ir.NewInt(base.Pos, elemtype.Size())), types.Types[types.TUINTPTR])

	clrname := "memclrNoHeapPointers"
	hasPointers := elemtype.HasPointers()
	if hasPointers {
		clrname = "memclrHasPointers"
		ir.CurFunc.SetWBPos(n.Pos())
	}

	var clr ir.Nodes
	clrfn := mkcall(clrname, nil, &clr, hp, hn)

				var ready atomic.Uint32
				go func() {
					sp := unsafe.Pointer(&src[0])
					dp := unsafe.Pointer(&dst[0])
					ready.Store(1)
					for i := 0; i < 10000; i++ {
						Memmove(dp, sp, sz)
						MemclrNoHeapPointers(dp, sz)
					}
					ready.Store(2)
				}()

				for ready.Load() == 0 {
					Gosched()
				}

				for ready.Load() != 2 {
					for i := range dst {
						p := dst[i]

	n := stk.hi - stk.lo
	if n&(n-1) != 0 {
		throw("stack not a power of 2")
	}
	if stk.lo+n < stk.hi {
		throw("bad stack size")
	}
	if stackDebug >= 1 {
		println("stackfree", v, n)
		memclrNoHeapPointers(v, n) // for testing, clobber stack data
	}
	if debug.efence != 0 || stackFromSystem != 0 {
		if debug.efence != 0 || stackFaultOnFree != 0 {
			sysFault(v, n)
		} else {