[PATCH] D139363: [SDAG] try to convert bit set/clear to signbit test when trunc is free

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

What about if we limited this to just feeding select / brcond ?



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Comment at: llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp:3725
+  auto *AndC = dyn_cast<ConstantSDNode>(N0.getOperand(1));
+  if (AndC && N0.hasOneUse() && isNullConstant(N1) &&
+      AndC->getAPIntValue().isPowerOf2()) {
----------------
Move hasOneUse() to end of the if() condition as its heaviest test? 


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D139363/new/

https://reviews.llvm.org/D139363