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2015-03-02 Ed Schonberg <schonberg@adacore.com> * sem_ch8.adb (Available_Subtype): Optimization in Find_Selected_Component: when safe, use existing subtype of array component, possibly discriminant-dependent, rather than creating new subtype declaration for it. In this fashion different occurrences of the component have the same subtype, rather than just equivalent ones. Simplifies value tracing in GNATProve. From-SVN: r221100
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