[PATCH] D64869: [SCEV] get more accurate range for AddExpr with NW flag

[Nikita Popov via Phabricator via llvm-commits]

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`makeGuaranteedNoWrapRegion()` cannot be used to constrain input ranges. E.g. consider that the RHS is [UINT_MAX-1, UINT_MAX]. Then the GWNR is just [0, 0], even though 1 would be a legal value for LHS (assuming the RHS is UINT_MAX-1).


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https://reviews.llvm.org/D64869