[PATCH] D156579: InstCombine: Fold fneg (ldexp x, n) -> ldexp (fneg x), n

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp:2532
 
-  if (match(FNeg, m_OneUse(m_FDiv(m_Value(X), m_Value(Y)))))
+  if (match(FNeg, m_FDiv(m_Value(X), m_Value(Y))))
     return BinaryOperator::CreateFDivFMF(Builder.CreateFNegFMF(X, &I), Y, &I);
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goldstein.w.n wrote:
> Seems like 2 changes at once? The change to oneuse checks of `(fneg (fmul/fdiv))` and the new transform. Maybe split?
It's not behaviorally changing, it's just avoiding repeating it 3x


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D156579/new/

https://reviews.llvm.org/D156579