if !ok || len(c.Args) != 1 {
			break
		}
		if !p.isType(c.Fun) && !p.isUnsafeData(c.Fun, false) {
			break
		}
		px = &c.Args[0]
	}
	if _, ok := (*px).(*ast.SliceExpr); !ok {
		return false
	}

	fmt.Fprintf(sb, "_cgoSlice%d := %s; ", i, gofmtPos(*px, (*px).Pos()))

	origX := *px
	*px = ast.NewIdent(fmt.Sprintf("_cgoSlice%d", i))