[PATCH] D142539: [NFC][AArch64] Use optional returns in target parser instead of 'invalid' objects

[Lucas Prates via Phabricator via cfe-commits]

pratlucas created this revision.
Herald added subscribers: hiraditya, kristof.beyls.
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pratlucas requested review of this revision.
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This updates the parsing methods in AArch64's Target Parser to make use
of optional returns instead of "invalid" enum values, making the API's
behaviour clearer.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D142539

Files:
  clang/lib/Basic/Targets/AArch64.cpp
  clang/lib/Driver/ToolChains/Arch/AArch64.cpp
  llvm/include/llvm/TargetParser/AArch64TargetParser.h
  llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  llvm/lib/TargetParser/AArch64TargetParser.cpp
  llvm/unittests/TargetParser/TargetParserTest.cpp

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