[PATCH] D61573: Add FNeg support to InstructionSimplify

[Cameron McInally via Phabricator via llvm-commits]

cameron.mcinally created this revision.
cameron.mcinally added reviewers: spatel, arsenm, kpn, andrew.w.kaylor, craig.topper.
Herald added subscribers: llvm-commits, hiraditya, wdng.
Herald added a project: LLVM.

This is the last chunk separated from the larger D61419 <https://reviews.llvm.org/D61419>...

Add FNeg support to InstructionSimplify. There is only one xform included in this patch:

  fneg (fneg X) -> X

We only have FP UnOps right now, but I added framework stubs for Integer UnOps also. That keeps the code inline with the BinOps functions. If anyone feels strongly against it, I will remove them.

I took a liberty with the added test and will comment inline so that it's clear for review purposes.


Repository:
  rL LLVM

https://reviews.llvm.org/D61573

Files:
  llvm/include/llvm/Analysis/InstructionSimplify.h
  llvm/lib/Analysis/InstructionSimplify.cpp
  llvm/test/Analysis/ConstantFolding/fneg.ll

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