[PATCH] D143180: DAG: Expand legalization of is.fpclass to fcmp for DAZ

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: jcranmer-intel, sepavloff, kpn, andrew.w.kaylor.
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Try to use a compare with 0 if DAZ is assumed.
FPClassTest really needs to be marked as a bimask enum, but the API
 for that is currently broken.


https://reviews.llvm.org/D143180

Files:
  llvm/include/llvm/ADT/FloatingPointMode.h
  llvm/include/llvm/CodeGen/CodeGenCommonISel.h
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/CodeGenCommonISel.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/test/CodeGen/X86/is_fpclass.ll
  llvm/unittests/ADT/FloatingPointMode.cpp

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