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52240399f9
Fixes a corner case of the analysis: previously GlobalValues could be affected by assumptions, but were not tracked within AffectedValues. This patch allows assumptions which affect a given GlobalValue to be looked up via `assumptionsFor()`. A small update to llvm/test/Analysis/ScalarEvolution/ranges.ll was necessary due to knowledge about a global value now being propagated from AssumptionCache -> ValueTracking -> ScalarEvolution.