[PATCH] D139772: InstSimplify: Add basic folding of llvm.is.fpclass intrinsic

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: sepavloff, spatel, kpn, andrew.w.kaylor, jcranmer-intel, jyknight.
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arsenm requested review of this revision.
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Copied from the existing llvm.amdgcn.class handling; eventually I will
fold that to the generic intrinsic when legal. The tests should
probably move into an instsimplify only test.


https://reviews.llvm.org/D139772

Files:
  llvm/lib/Analysis/ConstantFolding.cpp
  llvm/lib/Analysis/InstructionSimplify.cpp
  llvm/test/CodeGen/AMDGPU/llvm.is.fpclass.f16.ll
  llvm/test/Transforms/InstCombine/is_fpclass.ll

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