[PATCH] D75698: [analyzer][WIP] Suppress bug reports where a tracked expression's latest value change was a result of an invalidation

[Kristóf Umann via Phabricator via cfe-commits]

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In D75698#1908335 <https://reviews.llvm.org/D75698#1908335>, @NoQ wrote:

> In my head this patch should ideally be reduced to a single if-statement: "This value is a `SymbolDerived` //therefore// it was produced by invalidation".


Getting to this point already forced me to learn a lot about the inner workings of the analyzer, and I suspect I have quite a bit of work ahead of me still. Infact, I'm not even sure what `SymbolDerived` is. I suspect this approach should be abandoned then?

> It's harder than that, of course, because some derived symbols are legitimate (i.e., values returned through out-parameters). But this is a separate problem: instead of producing anonymous conjured symbols, invalidation should produce richer symbols that explain what kind of invalidation has happened and which specific effect of this invalidation is represented by this symbol. Or we could instead make better symbols for representing out-parameters.

Alright, I've got some learning to then :) Thanks!


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