[PATCH] D80744: DAGCombiner optimization for pow(x, 0.75) even in case massv function is asked

[Qing Shan Zhang via Phabricator via llvm-commits]

steven.zhang added a comment.

What we are doing is as follows:
llvm.pow(IR) --> FPOW(ISD) --> __powf4_P8/9(ISD/IR)

It makes more sense to do it in the IR pass from what I see. And then, you can query the TargetLibraryInfoImpl::isFunctionVectorizable(name) instead of the option. Maybe, we can do it in ppc pass: PPCLowerMASSVEntries which did something like:

  __sind2_massv --> __sind2_P9 for a Power9 subtarget.

Does it make sense ?


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https://reviews.llvm.org/D80744