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...all FunctionPasses. > One thing I have noticed is that addPreserved() doesn't seem to really > do anything. I would have thought it would be used in helping > determine the last users of a pass, but that doesn't appear to be the > case. It seems to mess with a structure called InheritedAnalysis, but > that in turn is never really used for anything. I've also noticed that addPreserved doesn't seem to do anything. Even if I say a pass preserves another pass, the other pass gets run again. > I've noticed that if you have a Module Pass (e.g., GlobalsModRef) that > is...

Ok, I've been struggling with this for two days and hopefully someone can help me out. I have a set of passes, analysis passes A, B, C, D and transformation passes E and F. Pass C depends on pass A and pass D depends on pass B. Pass E depends on C and D and does not preserve any analysis pass. Pass F depeds on pass A and pass C. Pass F runs after pass E. Graphically the dependency graph