[PATCH] D157717: [X86][Codegen] Remove dead code for ADCX/ADOX

[Kan Shengchen via Phabricator via llvm-commits]

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There is no pattern for ADCX/ADOX and they are never selected during
ISEL. So we remove the predicate in TD and cases in some MIR
optimizations in this patch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157717

Files:
  llvm/lib/Target/X86/X86FlagsCopyLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/lib/Target/X86/X86InstrArithmetic.td
  llvm/lib/Target/X86/X86InstrInfo.cpp
  llvm/test/CodeGen/X86/adx-commute.mir
  llvm/test/CodeGen/X86/flags-copy-lowering.mir
  llvm/test/CodeGen/X86/stack-folding-adx.mir

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