[PATCH] D30311: [ValueTracking] Don't do an unchecked shift in ComputeNumSignBits

[Sanjoy Das via Phabricator via llvm-commits]

sanjoy updated this revision to Diff 89763.
sanjoy added a comment.

- Address review


https://reviews.llvm.org/D30311

Files:
  lib/Analysis/ValueTracking.cpp
  test/Transforms/IndVarSimplify/pr32045.ll
  unittests/Analysis/ValueTrackingTest.cpp

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