Copyright 2009 The Go Authors. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
Malloc small size classes. See malloc.go for overview. See also mksizeclasses.go for how we decide what size classes to use.

package runtime
Returns size of the memory block that mallocgc will allocate if you ask for the size.
func ( uintptr) uintptr {
	if  < _MaxSmallSize {
		if  <= smallSizeMax-8 {
			return uintptr(class_to_size[size_to_class8[divRoundUp(, smallSizeDiv)]])
		} else {
			return uintptr(class_to_size[size_to_class128[divRoundUp(-smallSizeMax, largeSizeDiv)]])
		}
	}
	if +_PageSize <  {
		return 
	}
	return alignUp(, _PageSize)