[PATCH] D145326: [InstCombine] Transform `(shift X, Or(Y, BitWidth-1))` -> `(shift X,BitWidth-1)`

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp:492
+      NewShiftOp->setHasNoSignedWrap(I.hasNoSignedWrap());
+    }
+    return NewShiftOp;
----------------
Can also propagate the `exact` flag. At which point using `replaceOperand()` might actually be cleaner for once.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145326/new/

https://reviews.llvm.org/D145326