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

[Venkataramanan Kumar via Phabricator via llvm-commits]

venkataramanan.kumar.llvm added a comment.

Folding is not happening when the number of uses for the divide operand (say 1.0/something) is more than one.

The test case I added is same as below
ref: https://godbolt.org/z/xKh1n1  
here 1/sqrt(x) is used more than once  and the folding is not happening.

As I said this patch does not have the usage restriction and folds the particular case  of x *1/sqrt(x) to x/sqrt(x) and later we will optimize the divide away to sqrt(x).


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D86726/new/

https://reviews.llvm.org/D86726