[PATCH] D151690: [LoopIdiom] Freeze BitPos if !isGuaranteedNotToBeUndefOrPoison

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp:2403
+        BitMaskI->getOperand(1) == BitPos &&
+        "The case BitPos may undef is only existed in this specific pattern");
+    FreezeInst *BitPosFrozen =
----------------
Maybe it would be more robust to RAUW all uses instead?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151690/new/

https://reviews.llvm.org/D151690