[PATCH] D76707: [DAGCombine] Add basic optimizations for FREEZE in SelDag

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:11593
+  if (N0.getOpcode() == ISD::FREEZE)
+    return DAG.getFreeze(N0.getOperand(0));
+
----------------
Why are we creating a new `freeze x` when we already have `freeze x` in the form of `N0`?
(if it's due to the freeze semantics, please explain that in the code comment)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76707/new/

https://reviews.llvm.org/D76707