var p *notInHeap
	systemstack(func() {
		p = persistentalloc1(size, align, sysStat)
	})
	return unsafe.Pointer(p)
}

// Must run on system stack because stack growth can (re)invoke it.
// See issue 9174.
//
//go:systemstack
func persistentalloc1(size, align uintptr, sysStat *sysMemStat) *notInHeap {
	const (

	h := new(hmap)
	h.hash0 = uint32(rand())
	return h
}

// makemap implements Go map creation for make(map[k]v, hint).
// If the compiler has determined that the map or the first bucket
// can be created on the stack, h and/or bucket may be non-nil.
// If h != nil, the map can be created directly in h.
// If h.buckets != nil, bucket pointed to can be used as the first bucket.
//
// makemap should be an internal detail,

	if isSamePtr(p1, p2) {
		return !overlap(off1, n1, off2, n2)
	}
	// p1 and p2 are not the same, so if they are both OpAddrs then
	// they point to different variables.
	// If one pointer is on the stack and the other is an argument
	// then they can't overlap.
	switch p1.Op {
	case OpAddr, OpLocalAddr:
		if p2.Op == OpAddr || p2.Op == OpLocalAddr || p2.Op == OpSP {
			return true
		}

			t.Errorf("The result t2: %+v after Unmarshal is not matched original t1: %+v", t2, t1)
		}
	}
}

func TestUnmarshalTextAllocations(t *testing.T) {
	in := []byte(testdataRFC3339UTC) // short enough to be stack allocated
	if allocs := testing.AllocsPerRun(100, func() {
		var t Time
		t.UnmarshalText(in)
	}); allocs != 0 {
		t.Errorf("got %v allocs, want 0 allocs", allocs)
	}
}

			// This command-timeout code adapted from cmd/go/test.go
			// Note: the Go command uses a more sophisticated timeout
			// strategy, first sending SIGQUIT (if appropriate for the
			// OS in question) to try to trigger a stack trace, then
			// finally much later SIGKILL. If timeouts prove to be a
			// common problem here, it would be worth porting over
			// that code as well. See https://do.dev/issue/50973
			// for more discussion.

	t         *abi.Type
	framePool *sync.Pool
	abid      abiDesc
}

var layoutCache sync.Map // map[layoutKey]layoutType

// funcLayout computes a struct type representing the layout of the
// stack-assigned function arguments and return values for the function
// type t.
// If rcvr != nil, rcvr specifies the type of the receiver.
// The returned type exists only for GC, so we only fill out GC relevant info.