[PATCH] D62444: [CostModel] Add really basic support for being able to query the cost of the FNeg instruction.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel, andrew.w.kaylor, cameron.mcinally.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

This reuses the getArithmeticInstrCost, but passes dummy values of the second
operand flags.

The X86 costs are wrong and can be improved in a follow up. I just wanted to
stop it from reporting an unknown cost first.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D62444

Files:
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/X86/arith-fp.ll

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