Eli Friedman 5d5b08761f [DependenceAnalysis] Guard analysis using getPointerBase(). ...

D104806 broke some uses of getMinusSCEV() in DependenceAnalysis:
subtraction with different pointer bases returns a SCEVCouldNotCompute.
Make sure we avoid cases involving such subtractions.

Differential Revision: https://reviews.llvm.org/D106099

2021-07-15 14:57:32 -07:00

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