[PATCH] D85533: [InstCombine] Optimize select(freeze(icmp eq/ne x, y), x, y)

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp:2543
+    auto *NewFr = Builder.CreateFreeze(Pred == ICmpInst::ICMP_EQ ?
+                                       FalseVal : TrueVal);
+    NewFr->takeName(&Sel);
----------------
Why is it necessary to freeze the result? Alive accepts this without the freeze as well: https://alive2.llvm.org/ce/z/X49hNE


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D85533/new/

https://reviews.llvm.org/D85533