Editing Yhc/RTS/GC (section)

== Move ==

The move phase does two things: it moves all nodes to their new positions and it performs any remaining threaded-pointer updates.

Looking carefully at the description of the sweep phase it can be seen that it will only update program roots and forward pointers in the heap (i.e. pointers to addresses higher than the address of the pointer). However the sweep phase will not have updated backward pointers, although it will have already threaded them.

The only slight complication comes when moving stack nodes as these have an internal pointer structure that needs to be preserved (the chain of stack frames). The move phase thus calls proc_moveStack for these special case nodes, which fixes the frame pointer chains in the stack to be correct for the stack nodes's new location.