C++: Don't generate IR for functions with bad ASTs#517
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This change provides a mechanism by which a query can tell the IR package to only create IR for certain functions. This is mostly useful for "PrintIR.qll", which uses this feature to avoid the expense of creating IR for functions that aren't going to be printed.
An slightly invalid AST can cause IR construction to generate extremely bad IR. This change provides a single place to detect invalid ASTs, and to skip IR construction for the affected functions.
jbj
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This test was failing due to a semantic merge conflict between github#509, which added `UninitializedInstruction`, and github#517, which added new test code that would get `UninitializedInstruction`s in it after merging with github#509.
cklin
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…nder-odasa Unify two implementations of GetExtractorPath
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Many of the IR sanity check failures I've hit when running on real-world snapshots are due to the original ASTs being ill-formed in one way or another. This PR provides a filtering mechanism to avoid generating IR for functions that match an
isInvalidFunctionpredicate, and then implements that predicate to filter out the issues that I already know about. I'll open an individual extractor bug for each of these.See individual commit messages for more detail.