livenessMap Map
	stackMapSet bvecSet
	stackMaps   []bitvec.BitVec

	cache progeffectscache

	// partLiveArgs includes input arguments (PPARAM) that may
	// be partially live. That is, it is considered live because
	// a part of it is used, but we may not initialize all parts.
	partLiveArgs map[*ir.Name]bool

	doClobber     bool // Whether to clobber dead stack slots in this function.

	// Map from GC safe points to liveness index, generated by
	// liveness analysis.
	livenessMap liveness.Map

	// partLiveArgs includes arguments that may be partially live, for which we
	// need to generate instructions that spill the argument registers.
	partLiveArgs map[*ir.Name]bool

	// lineRunStart records the beginning of the current run of instructions
	// within a single block sharing the same line number