[PATCH] D54274: Constant folding and instcombine for saturating subs

[Nikita Popov via Phabricator via llvm-commits]

nikic updated this revision to Diff 173550.
nikic edited the summary of this revision.
nikic added a comment.

Rebase over APInt patch, implement new undef folds with zero result.


https://reviews.llvm.org/D54274

Files:
  lib/Analysis/ConstantFolding.cpp
  lib/Analysis/InstructionSimplify.cpp
  lib/Analysis/ValueTracking.cpp
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/Transforms/InstCombine/saturating-sub.ll

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