[PATCH] D104648: [Mem2Reg] Use poison instead of undef for read of uninitialized memory

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune added a comment.

Or, can we temporarily mark an alloca with `!has_bitfield` if it had bitfields in C & make mem2reg use poison only when uninitialized memory is read, for a while?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D104648/new/

https://reviews.llvm.org/D104648