tree f2c91fcf489f0d844e69fdf7a7672104ed0de626
parent 05a2d7fcc159bed9366069f7c8caa6283ea1e3c6
author Nemanja Ivanovic <nemanja.i.ibm@gmail.com> 1549655458 +0000
committer Nemanja Ivanovic <nemanja.i.ibm@gmail.com> 1549655458 +0000

[DAGCombine] Optimize pow(X, 0.75) to sqrt(X) * sqrt(sqrt(X))

The sqrt case is faster and we already do this for the case where
the exponent is 0.25. This adds the 0.75 case which is also not
sensitive to signed zeros.

Patch by Whitney Tsang (Whitney)

Differential revision: https://reviews.llvm.org/D57434


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353557 91177308-0d34-0410-b5e6-96231b3b80d8