[PATCH] D52304: [X86][BMI1]: X86DAGToDAGISel: select BEXTR from x & ~(-1 << nbits) pattern

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: lib/Target/X86/X86ISelDAGToDAG.cpp:2678
+    ConstantSDNode *ShlCst = dyn_cast<ConstantSDNode>(M0->getOperand(0));
+    if (!ShlCst || !ShlCst->isAllOnesValue())
+      return false;
----------------
ISD::isAllOnesConstant


Repository:
  rL LLVM

https://reviews.llvm.org/D52304