[PATCH] D86726: [InstCombine]: Transform 1.0/sqrt(X) * X to X/sqrt(X) and X * 1.0/sqrt(X) to X/sqrt(X)

[Noel Grandin via Phabricator via llvm-commits]

grandinj added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp:552
+
+    // X * 1.0/sqrt(X) = X/sqrt(X).
+    if (match(Op1, (m_FDiv(m_SpecificFP(1.0), m_Value(Y)))) &&
----------------
Just a drive-by commentator: I am surprised there is not an existing transform which does
   1 * X ==> X
   X * 1 ==> X
   X / 1 ==> X


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D86726/new/

https://reviews.llvm.org/D86726