[PATCH] D47156: [DAGCombiner] isAllOnesConstantOrAllOnesSplatConstant(): look through bitcasts

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:917
+  if (N.getOpcode() == ISD::BITCAST)
+    return isAllOnesConstantOrAllOnesSplatConstant(N.getOperand(0));
   unsigned BitWidth = N.getScalarValueSizeInBits();
----------------
Don't make it recursive:
```
while (N.getOpcode() == ISD::BITCAST)
  N = N->getOperand(0);
```




Repository:
  rL LLVM

https://reviews.llvm.org/D47156