[PATCH] D47041: [ValueTracking] Teach computeKnownBits that the result of an absolute value pattern that uses nsw flag is always positive.

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 148113.
craig.topper added a comment.

Add a simple test case to show (abs(x)) > 0 is always true.


https://reviews.llvm.org/D47041

Files:
  lib/Analysis/ValueTracking.cpp
  lib/Transforms/InstCombine/InstCombineAddSub.cpp
  test/Transforms/InstCombine/abs-1.ll
  test/Transforms/InstCombine/abs_abs.ll

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