// First, see if it is already spilled before it may be live. Look for a spill
		// in the entry block up to the first safepoint.
		type nameOff struct {
			n   *ir.Name
			off int64
		}
		partLiveArgsSpilled := make(map[nameOff]bool)
		for _, v := range f.Entry.Values {
			if v.Op.IsCall() {
				break
			}
			if v.Op != ssa.OpStoreReg || v.Args[0].Op != ssa.OpArgIntReg {
				continue
			}