[PATCH] D140324: [SDAG] neg x with only low bit demanded is x

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp:2635
+    // neg x with only low bit demanded is simply x.
+    // add 0, x with only low bit demanded is simply x
+    if (DemandedBits.isOne() &&
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ISD::MUL has a fallthrough into this block. I don't think this is correct for it.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D140324/new/

https://reviews.llvm.org/D140324