[PATCH] D148931: [SCEV] Don't blindly transfer nowrap flags to pre-inc addrec

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev added a comment.

I don't quite understand your example. Two AddRecs with same start/step bound to one loop with different flags simply cannot exist, it would be one entity in UniqueSCEVs. And if we were able to infer `nuw` it for it in some situation, it means we have proven that it does not overflow (meaning that the loop doesn't make more than UINT_MAX iterations) regardless of uses.



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Comment at: llvm/test/Analysis/ScalarEvolution/different-loops-recs.ll:1
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 2
 ; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
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Precommit check regeneration?


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https://reviews.llvm.org/D148931