[PATCH] D125983: [DeadArgElim] Use poison instead of undef as placeholder for dead arguments

[Nuno Lopes via Phabricator via llvm-commits]

nlopes created this revision.
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DeadArgElim uses undef values as placeholder for dead arguments. Let's switch that to poison as it doesn't matter which value we use and we get one step closer of getting rid of undef.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125983

Files:
  llvm/lib/Transforms/IPO/DeadArgumentElimination.cpp
  llvm/test/Transforms/DeadArgElim/NoundefAttrs.ll
  llvm/test/Transforms/DeadArgElim/aggregates.ll
  llvm/test/Transforms/DeadArgElim/byref.ll
  llvm/test/Transforms/DeadArgElim/dbginfo-update-dbgval-local.ll
  llvm/test/Transforms/DeadArgElim/dbginfo-update-dbgval.ll
  llvm/test/Transforms/DeadArgElim/deadexternal.ll
  llvm/test/Transforms/DeadArgElim/fct_ptr.ll
  llvm/test/Transforms/DeadArgElim/opaque-ptr.ll
  llvm/test/Transforms/DeadArgElim/variadic_safety.ll

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