[PATCH] D147421: [BPF] Fix assembly parsing errors for atomic_fetch_* instructions

[Eduard Zingerman via Phabricator via llvm-commits]

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Fixes BPF assembler parsing errors for the following instructions:

- atomic_fetch_add
- atomic_fetch_and
- atomic_fetch_xor
- atomic_fetch_or
- cmpxchg32_32
- cmpxchg_64
- xchg32_32
- xchg_64

Also add a test to verify that all instructions could be assembled and disassembled.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147421

Files:
  llvm/lib/Target/BPF/AsmParser/BPFAsmParser.cpp
  llvm/test/CodeGen/BPF/assembler-disassembler.s

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