[PATCH] D105392: [InstCombine] Add optimization to prevent poison from being propagated.

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstructionCombining.cpp:3539
+  // the OrigOp is only used by the freeze.
+  if (!OrigOpInst || !OrigOpInst->hasOneUse() || isa<PHINode>(OrigOp) ||
+      canCreateUndefOrPoison(dyn_cast<Operator>(OrigOp)))
----------------
The one-use check may need refinement given `freezeDominatedUses()`


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105392/new/

https://reviews.llvm.org/D105392