[PATCH] D61888: TableGen: support #ifndef in addition to #ifdef

[Tim Northover via Phabricator via llvm-commits]

t.p.northover created this revision.
Herald added subscribers: hiraditya, mcrosier.
Herald added a project: LLVM.

TableGen's preprocessor currently only supports #ifdef, but we have a situation where #ifndef would be more convenient. So this patch adds support.


Repository:
  rL LLVM

https://reviews.llvm.org/D61888

Files:
  llvm/lib/TableGen/TGLexer.cpp
  llvm/lib/TableGen/TGLexer.h
  llvm/test/TableGen/prep-diag5.td
  llvm/test/TableGen/prep-ifndef-diag-1.td
  llvm/test/TableGen/prep-ifndef-diag-2.td
  llvm/test/TableGen/prep-ifndef.td

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