Vocabularycompiler.cfg.instructionsClass descriptionA tuple that holds info necessary for a gc cycle to figure out where the gc root pointers are. It has the following slots:
| gc-roots | sequence of vregs or spill-slots |
| derived-roots | An assoc of pairs of vregs or spill slots. |
The 'gc-roots' and 'derived-roots' slots are initially vreg integers referencing objects that are live during the gc call and needs to be spilled so that they can be traced. In the
emit-gc-map-insn word in
compiler.cfg.linear-scan.assignment they are converted to spill slots which the collector is able to trace.
See alsoemit-gc-info-bitmap,
fill-gc-mapDefinition