[PATCH] D144777: [InstCombine] Fold signbit test of a pow2 or zero

[Sanjay Patel via Phabricator via llvm-commits]

spatel added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp:1826
   bool TrueIfNeg;
   if (isSignBitCheck(Pred, C, TrueIfNeg)) {
     // ((X - 1) & ~X) <  0 --> X == 0
----------------
Re-use this logic (put the new code inside of here)?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D144777/new/

https://reviews.llvm.org/D144777