// See stackalloc.go's {new,put}StackAllocState.
	stackAllocState *stackAllocState

	scrPoset []*poset // scratch poset to be reused

	// Reusable regalloc state.
	regallocValues []valState

	ValueToProgAfter []*obj.Prog
	debugState       debugState

	Liveness interface{} // *gc.livenessFuncCache

	// Free "headers" for use by the allocators in allocators.go.
	// Used to put slices in sync.Pools without allocation.

		progToBlock[s.pp.Next] = f.Blocks[0]
	}

	if base.Ctxt.Flag_locationlists {
		if cap(f.Cache.ValueToProgAfter) < f.NumValues() {
			f.Cache.ValueToProgAfter = make([]*obj.Prog, f.NumValues())
		}
		valueToProgAfter = f.Cache.ValueToProgAfter[:f.NumValues()]
		for i := range valueToProgAfter {
			valueToProgAfter[i] = nil
		}
	}

	// If the very first instruction is not tagged as a statement,