[PATCH] D13613: [SCEV] Mark AddExprs as nsw or nuw if legal

[Sanjoy Das via llvm-commits]

sanjoy created this revision.
sanjoy added reviewers: atrick, hfinkel, nlewycky.
sanjoy added a subscriber: llvm-commits.
Herald added a subscriber: sanjoy.

This uses `ScalarEvolution::getRange` and not potentially control
dependent `nsw` and `nuw` bits on the arithmetic instruction.

http://reviews.llvm.org/D13613

Files:
  lib/Analysis/ScalarEvolution.cpp
  test/Analysis/Delinearization/multidim_ivs_and_integer_offsets_3d.ll
  test/Analysis/Delinearization/multidim_ivs_and_integer_offsets_nts_3d.ll
  test/Analysis/ScalarEvolution/infer-prestart-no-wrap.ll
  test/Analysis/ScalarEvolution/min-max-exprs.ll
  test/Analysis/ScalarEvolution/no-wrap-add-exprs.ll
  test/Transforms/LoopStrengthReduce/quadradic-exit-value.ll

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