Inspection of industrial code for syntactical loop analysis

Flow analysis can be used in WCET analysis to, e.g., determine loop bounds and infeasible paths. Such infor- mation can be used by low level analysis and for actual WCET calculation. An efficient flow analysis method is syntactical analysis. This method identifies certain pre- defined syntactical constructs. It is not reasonable to believe that we will be able to use syntactical analysis to identify all conceivable constructs. Therefore we need to learn which to prioritize. This paper suggests methods for inspection of indus- trial code to record properties of code that will give hints how to design a syntactical analysis. We describe the code properties to analyze, and present preliminary re- sults for some industrial real-time code.