Driver: Handle -Xarch_, including warning for nasty -Xarch_ use cases
we aren't going to support. For example:
  clang -Xarch_i386 -S -Xarch_i386 -o -Xarch_i386 myi386asm.s ...


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67680 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed