Max Kazantsev f10500e220 [IndVars] Use isLoopBackedgeGuardedByCond for last iteration check ...

Use more context to prove contextual facts about the last iteration. It is
only executed when the backedge is taken, so we can use `isLoopBackedgeGuardedByCond`
to make this check.

Differential Revision: https://reviews.llvm.org/D91535
Reviewed By: skatkov

2020-11-26 12:37:21 +07:00

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