[PATCH] D140796: [ValueTracking] Improve ComputeNumSignBits to handle Trunc

[Owen Anderson via Phabricator via llvm-commits]

resistor updated this revision to Diff 485839.
resistor added a comment.

Update for test comments and add tests.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D140796/new/

https://reviews.llvm.org/D140796

Files:
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/test/Transforms/InstCombine/high-bit-signmask-with-trunc.ll
  llvm/test/Transforms/InstCombine/negated-bitmask.ll
  llvm/test/Transforms/InstCombine/vector-trunc.ll

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