getValue
We were building essentially a CP of all control flow nodes:
```
Tuple counts for Essa::AssignmentDefinition::getValue#dispred#f0820431#ff/2@dd1f67vl after 2m45s:
733365 ~6% {3} r1 = JOIN Essa::TEssaNodeDefinition#24e22a14#ffff_30#join_rhs WITH Essa::EssaNodeDefinition::getDefiningNode#dispred#f0820431#ff ON FIRST 1 OUTPUT Lhs.1, Rhs.1, Rhs.0
376588 ~0% {2} r2 = JOIN r1 WITH SsaDefinitions::SsaSource::assignment_definition#9197156e#fff ON FIRST 2 OUTPUT Lhs.2 'this', Rhs.2 'result'
376588 ~0% {3} r3 = JOIN r2 WITH Essa::TEssaNodeDefinition#24e22a14#ffff_30#join_rhs ON FIRST 1 OUTPUT Rhs.1, Lhs.0 'this', Lhs.1 'result'
6965593033 ~2% {3} r4 = JOIN r3 WITH project#SsaDefinitions::SsaSource::assignment_definition#9197156e ON FIRST 1 OUTPUT Lhs.1 'this', Rhs.1, Lhs.2 'result'
376588 ~0% {2} r5 = JOIN r4 WITH Essa::EssaNodeDefinition::getDefiningNode#dispred#f0820431#ff ON FIRST 2 OUTPUT Lhs.0 'this', Lhs.2 'result'
return r5
```
We first tried preventing the join on `result`, but this caused the
characteristic predicate to blow up instead. Finally, we figured just
putting the `value` part in a field would be sufficient, and this did
the trick.
CodeQL
This open source repository contains the standard CodeQL libraries and queries that power GitHub Advanced Security and the other application security products that GitHub makes available to its customers worldwide. For the queries, libraries, and extractor that power Go analysis, visit the CodeQL for Go repository.
How do I learn CodeQL and run queries?
There is extensive documentation on getting started with writing CodeQL. You can use the CodeQL for Visual Studio Code extension or the interactive query console on LGTM.com (Semmle Legacy product) to try out your queries on any open source project that's currently being analyzed.
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License
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CodeQL for Visual Studio Code
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