[PATCH] D143198: DAG: Lower is.fpclass fcInf to fcmp of fabs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: jcranmer-intel, sepavloff, scanon, andrew.w.kaylor, kpn.
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InstCombine should have taken care of this, but I think
this is more useful in the future when the expansion
tries to handle multiple cases at a time with fcmp.

      

x87 looks worse to me but the only thing I know about it is that
I aggressively do not care about it.


https://reviews.llvm.org/D143198

Files:
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/test/CodeGen/PowerPC/is_fpclass.ll
  llvm/test/CodeGen/X86/is_fpclass-fp80.ll
  llvm/test/CodeGen/X86/is_fpclass.ll

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