[PATCH] D98410: [ConstantFold] Handle undef/poison when constant folding smul_fix/smul_fix_sat

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope created this revision.
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Do constant folding according to

  posion * C -> poison
  C * poison -> poison
  undef * C -> 0
  C * undef -> 0

for smul_fix and smul_fix_sat intrinsics (for any scale).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D98410

Files:
  llvm/lib/Analysis/ConstantFolding.cpp
  llvm/test/Transforms/InstSimplify/ConstProp/smul-fix-sat.ll
  llvm/test/Transforms/InstSimplify/ConstProp/smul-fix.ll

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