[PATCH] D149325: [DAG] Do not call computeKnownBits from isKnownToBeAPowerOfTwo

[Jay Foad via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGfdc0d5f3999a: [DAG] Do not call computeKnownBits from isKnownToBeAPowerOfTwo (authored by foad).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149325/new/

https://reviews.llvm.org/D149325

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp


Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
===================================================================
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -4022,10 +4022,7 @@
 
   // More could be done here, though the above checks are enough
   // to handle some common cases.
-
-  // Fall back to computeKnownBits to catch other known cases.
-  KnownBits Known = computeKnownBits(Val);
-  return (Known.countMaxPopulation() == 1) && (Known.countMinPopulation() == 1);
+  return false;
 }
 
 unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, unsigned Depth) const {


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