[PATCH] D149195: [SelectionDAG] Limit max recursion in `isKnownNeverZero` and `isKnownToBeAPowerOfTwo`

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:3979
+bool SelectionDAG::isKnownToBeAPowerOfTwo(SDValue Val, unsigned Depth) const {
+  if (Depth++ >= MaxRecursionDepth)
+    return false; // Limit search depth.
----------------
In the existing SelectionDAG recursion methods, we don't increment Depth here but in the recursive calls to make it more obvious (and avoids any messy Depth - 1 hacks)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149195/new/

https://reviews.llvm.org/D149195