In previous work Bruynooghe, Janssens and Kågedal developed a live-structure analysis for Mercury which detects memory cells available for reuse. Separate compilation of modules is an essential ingredient of a language such as Mercury which supports programming in the large. Hence, to be practical, a live-structure analysis also has to be module based. This paper develops a modular live-structure analysis and extends it with a modular reuse analysis. It also describes preliminary results obtained with a first prototype of the module based analysis.