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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal">(fairly new around here, apologies if the question has an obvious answer)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve been studying the structure of the new PassManager in the hopes of using it soon. After watching a couple of talks (Chandler / Sergeev), I decided to start with the Concept/Model classes in PassManagerInternal.h<o:p></o:p></p>
<p class="MsoNormal">While I could make sense of almost everything there, two details caught my attention:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">1- The PassConcept abstract class has a function `run = 0;` which returns an object of type `PreservedAnalysis`. Such object is forward-declared in this header, but it is defined in PassManager.h This is the only place in the file where
we reference this class.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, right after, we define the PassModel class which derives from PassConcept, and one of its template parameters is a typename `PreservedAnalysisT`. The implementation of the `run` method uses the keyword override and it returns an
object of type `PreservedAnalysisT`. <o:p></o:p></p>
<p class="MsoNormal">This should raise a warning if PreservedAnalysisT != PreservedAnalysis. Is this intentional? My naive intuition is that we should have removed PreservedAnalysisT from the template and used PreservedAnalysis. However, everywhere else in
the file PreservedAnalysisT is used as template parameter.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Am I missing something obvious?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2- A similar issue arises when using AnalysisManager. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Both PassConcept and PassModel have a template typename `AnalysisManagerT`.<o:p></o:p></p>
<p class="MsoNormal">However, AnalysisPassConcept and AnalysisPassModel have no such template parameter; instead, they use the forward-declared AnalysisManager type, defined in PassManager.h<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Again, is there a particular reason for this apparent inconsistency?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks! <o:p></o:p></p>
<p class="MsoNormal">--<o:p></o:p></p>
<p class="MsoNormal">Felipe de Azevedo Piovezan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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